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447 lines
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<a href="cp__model__presolve_8cc.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// Copyright 2010-2021 Google LLC</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">// Licensed under the Apache License, Version 2.0 (the "License");</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// you may not use this file except in compliance with the License.</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">// You may obtain a copy of the License at</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">//</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">// http://www.apache.org/licenses/LICENSE-2.0</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">//</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">// Unless required by applicable law or agreed to in writing, software</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">// distributed under the License is distributed on an "AS IS" BASIS,</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment">// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">// See the License for the specific language governing permissions and</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment">// limitations under the License.</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> </div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#include "<a class="code" href="cp__model__presolve_8h.html">ortools/sat/cp_model_presolve.h</a>"</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> </div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include <sys/stat.h></span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> </div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#include <algorithm></span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="preprocessor">#include <cstdint></span></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor">#include <cstdlib></span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#include <deque></span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#include <limits></span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#include <map></span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include <memory></span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include <numeric></span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include <set></span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#include <string></span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#include <utility></span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#include <vector></span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> </div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#include "absl/container/flat_hash_map.h"</span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#include "absl/container/flat_hash_set.h"</span></div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#include "absl/hash/hash.h"</span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#include "absl/random/random.h"</span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor">#include "absl/strings/str_join.h"</span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor">#include "<a class="code" href="integral__types_8h.html">ortools/base/integral_types.h</a>"</span></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="preprocessor">#include "<a class="code" href="base_2logging_8h.html">ortools/base/logging.h</a>"</span></div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="preprocessor">#include "<a class="code" href="map__util_8h.html">ortools/base/map_util.h</a>"</span></div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="preprocessor">#include "<a class="code" href="mathutil_8h.html">ortools/base/mathutil.h</a>"</span></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="preprocessor">#include "<a class="code" href="stl__util_8h.html">ortools/base/stl_util.h</a>"</span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="preprocessor">#include "<a class="code" href="port_2proto__utils_8h.html">ortools/port/proto_utils.h</a>"</span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="preprocessor">#include "<a class="code" href="circuit_8h.html">ortools/sat/circuit.h</a>"</span></div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="preprocessor">#include "<a class="code" href="cp__model_8pb_8h.html">ortools/sat/cp_model.pb.h</a>"</span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="preprocessor">#include "<a class="code" href="cp__model__checker_8h.html">ortools/sat/cp_model_checker.h</a>"</span></div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="preprocessor">#include "<a class="code" href="cp__model__expand_8h.html">ortools/sat/cp_model_expand.h</a>"</span></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="preprocessor">#include "<a class="code" href="cp__model__loader_8h.html">ortools/sat/cp_model_loader.h</a>"</span></div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="preprocessor">#include "<a class="code" href="cp__model__mapping_8h.html">ortools/sat/cp_model_mapping.h</a>"</span></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="preprocessor">#include "<a class="code" href="cp__model__objective_8h.html">ortools/sat/cp_model_objective.h</a>"</span></div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="preprocessor">#include "<a class="code" href="cp__model__symmetries_8h.html">ortools/sat/cp_model_symmetries.h</a>"</span></div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="preprocessor">#include "<a class="code" href="cp__model__utils_8h.html">ortools/sat/cp_model_utils.h</a>"</span></div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="preprocessor">#include "<a class="code" href="diffn__util_8h.html">ortools/sat/diffn_util.h</a>"</span></div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="preprocessor">#include "<a class="code" href="presolve__util_8h.html">ortools/sat/presolve_util.h</a>"</span></div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="preprocessor">#include "<a class="code" href="probing_8h.html">ortools/sat/probing.h</a>"</span></div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="preprocessor">#include "<a class="code" href="sat__base_8h.html">ortools/sat/sat_base.h</a>"</span></div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="preprocessor">#include "<a class="code" href="sat__parameters_8pb_8h.html">ortools/sat/sat_parameters.pb.h</a>"</span></div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="preprocessor">#include "<a class="code" href="simplification_8h.html">ortools/sat/simplification.h</a>"</span></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="preprocessor">#include "<a class="code" href="var__domination_8h.html">ortools/sat/var_domination.h</a>"</span></div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> </div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="keyword">namespace </span><a class="code" href="namespaceoperations__research.html">operations_research</a> {</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="keyword">namespace </span>sat {</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span> </div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="keywordtype">bool</span> CpModelPresolver::RemoveConstraint(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->Clear();</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span> }</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span> </div><div class="line"><a name="l00067"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_cp_model_presolver.html#a6c402792bbe83aa90b75033080755f9b"> 67</a></span> <span class="keywordtype">void</span> <a class="code" href="classoperations__research_1_1sat_1_1_cp_model_presolver.html#a6c402792bbe83aa90b75033080755f9b">CpModelPresolver::RemoveEmptyConstraints</a>() {</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="comment">// Remove all empty constraints. Note that we need to remap the interval</span></div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="comment">// references.</span></div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  std::vector<int> interval_mapping(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#aeaf0da781ca9b370d96b7fbd3f74266a">constraints_size</a>(),</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  -1);</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keywordtype">int</span> new_num_constraints = 0;</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> old_num_non_empty_constraints =</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#aeaf0da781ca9b370d96b7fbd3f74266a">constraints_size</a>();</div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> c = 0; c < old_num_non_empty_constraints; ++c) {</div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="keyword">const</span> <span class="keyword">auto</span> type = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#afce66afa8ae7776a449bba7313ea3559">constraints</a>(c).<a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a5f9869899e2c94786f9709684f1ecc56">constraint_case</a>();</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keywordflow">if</span> (type == ConstraintProto::ConstraintCase::CONSTRAINT_NOT_SET) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keywordflow">if</span> (type == ConstraintProto::ConstraintCase::kInterval) {</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  interval_mapping[c] = new_num_constraints;</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  }</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a9b3e1bc8b76ea7d2614fd7ec2b066039">mutable_constraints</a>(new_num_constraints++)</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  -><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ac7caf1a731f00343e5056d464e74a50b">Swap</a>(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a9b3e1bc8b76ea7d2614fd7ec2b066039">mutable_constraints</a>(c));</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  }</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a9b3e1bc8b76ea7d2614fd7ec2b066039">mutable_constraints</a>()->DeleteSubrange(</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  new_num_constraints, old_num_non_empty_constraints - new_num_constraints);</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="keywordflow">for</span> (<a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html">ConstraintProto</a>& ct_ref :</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  *context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a9b3e1bc8b76ea7d2614fd7ec2b066039">mutable_constraints</a>()) {</div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a81b6165b5a5412969f351d0d343166b9">ApplyToAllIntervalIndices</a>(</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  [&interval_mapping](<span class="keywordtype">int</span>* ref) {</div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  *ref = interval_mapping[*ref];</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <a class="code" href="base_2logging_8h.html#ab25e01a2942b821d66371fc68d53f2eb">CHECK_NE</a>(-1, *ref);</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  },</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  &ct_ref);</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  }</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span> }</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span> </div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="keywordtype">bool</span> CpModelPresolver::PresolveEnforcementLiteral(<a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html">ConstraintProto</a>* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keywordflow">if</span> (!<a class="code" href="namespaceoperations__research_1_1sat.html#a42a3b266d8c6dfab1c14baa6c04e2333">HasEnforcementLiteral</a>(*<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span> </div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keywordtype">int</span> new_size = 0;</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> old_size = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->enforcement_literal().size();</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a> : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->enforcement_literal()) {</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a890f923209473cf55ac002d1b14bd9e2">LiteralIsTrue</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>)) {</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="comment">// We can remove a literal at true.</span></div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"true enforcement literal"</span>);</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  }</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span> </div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a9f3443b281c705edf1779f746637ad9b">LiteralIsFalse</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>)) {</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"false enforcement literal"</span>);</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  }</div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span> </div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a54cf7f0077717d59a828b656b60c1615">VariableIsUniqueAndRemovable</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>)) {</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="comment">// We can simply set it to false and ignore the constraint in this case.</span></div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"enforcement literal not used"</span>);</div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <a class="code" href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a>(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ad0d1a630c07ba2321cf43d97a425bc30">SetLiteralToFalse</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>));</div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  }</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span> </div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="comment">// If the literal only appear in the objective, we might be able to fix it</span></div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="comment">// to false. TODO(user): generalize if the literal always appear with the</span></div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="comment">// same polarity.</span></div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a34e2cd343e0dfb06af9f67df8c4c3502">VariableWithCostIsUniqueAndRemovable</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>)) {</div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <span class="keyword">const</span> int64_t obj_coeff =</div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <a class="code" href="namespacegtl.html#abce27d097bc5680207b294bdad75f59f">gtl::FindOrDie</a>(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a66fc178adf4c7e56b3a6f1a5e052d3e5">ObjectiveMap</a>(), <a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>));</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="keywordflow">if</span> (<a class="code" href="namespaceoperations__research_1_1sat.html#a217338425de4389014563f1f24331713">RefIsPositive</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>) == (obj_coeff > 0)) {</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="comment">// It is just more advantageous to set it to false!</span></div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"enforcement literal with unique direction"</span>);</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <a class="code" href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a>(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ad0d1a630c07ba2321cf43d97a425bc30">SetLiteralToFalse</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>));</div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  }</div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  }</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span> </div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->set_enforcement_literal(new_size++, <a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>);</div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  }</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_enforcement_literal()->Truncate(new_size);</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="keywordflow">return</span> new_size != old_size;</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span> }</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span> </div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span> <span class="keywordtype">bool</span> CpModelPresolver::PresolveBoolXor(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <span class="keywordflow">if</span> (<a class="code" href="namespaceoperations__research_1_1sat.html#a42a3b266d8c6dfab1c14baa6c04e2333">HasEnforcementLiteral</a>(*<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span> </div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <span class="keywordtype">int</span> new_size = 0;</div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <span class="keywordtype">bool</span> changed = <span class="keyword">false</span>;</div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <span class="keywordtype">int</span> num_true_literals = 0;</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <span class="keywordtype">int</span> true_literal = <a class="code" href="alldiff__cst_8cc.html#ad10edae0a852d72fb76afb1c77735045">std::numeric_limits<int32_t>::min</a>();</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a> : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->bool_xor().literals()) {</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="comment">// TODO(user): More generally, if a variable appear in only bool xor</span></div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <span class="comment">// constraints, we can simply eliminate it using linear algebra on Z/2Z.</span></div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <span class="comment">// This should solve in polynomial time the parity-learning*.fzn problems</span></div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="comment">// for instance. This seems low priority, but it is also easy to do. Even</span></div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="comment">// better would be to have a dedicated propagator with all bool_xor</span></div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  <span class="comment">// constraints that do the necessary linear algebra.</span></div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a54cf7f0077717d59a828b656b60c1615">VariableIsUniqueAndRemovable</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>)) {</div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"TODO bool_xor: remove constraint"</span>);</div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  }</div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span> </div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a9f3443b281c705edf1779f746637ad9b">LiteralIsFalse</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>)) {</div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"bool_xor: remove false literal"</span>);</div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  changed = <span class="keyword">true</span>;</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a890f923209473cf55ac002d1b14bd9e2">LiteralIsTrue</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>)) {</div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  true_literal = <a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>; <span class="comment">// Keep if we need to put one back.</span></div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  num_true_literals++;</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  }</div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span> </div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_bool_xor()->set_literals(new_size++, <a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>);</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  }</div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="keywordflow">if</span> (new_size == 1) {</div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"TODO bool_xor: one active literal"</span>);</div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (new_size == 2) {</div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"TODO bool_xor: two active literals"</span>);</div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  }</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  <span class="keywordflow">if</span> (num_true_literals % 2 == 1) {</div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <a class="code" href="base_2logging_8h.html#ab25e01a2942b821d66371fc68d53f2eb">CHECK_NE</a>(true_literal, <a class="code" href="alldiff__cst_8cc.html#ad10edae0a852d72fb76afb1c77735045">std::numeric_limits<int32_t>::min</a>());</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_bool_xor()->set_literals(new_size++, true_literal);</div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  }</div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <span class="keywordflow">if</span> (num_true_literals > 1) {</div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"bool_xor: remove even number of true literals"</span>);</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  changed = <span class="keyword">true</span>;</div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  }</div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_bool_xor()->mutable_literals()->Truncate(new_size);</div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  <span class="keywordflow">return</span> changed;</div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span> }</div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span> </div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span> <span class="keywordtype">bool</span> CpModelPresolver::PresolveBoolOr(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span> </div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  <span class="comment">// Move the enforcement literal inside the clause if any. Note that we do not</span></div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  <span class="comment">// mark this as a change since the literal in the constraint are the same.</span></div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  <span class="keywordflow">if</span> (<a class="code" href="namespaceoperations__research_1_1sat.html#a42a3b266d8c6dfab1c14baa6c04e2333">HasEnforcementLiteral</a>(*<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) {</div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"bool_or: removed enforcement literal"</span>);</div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a> : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->enforcement_literal()) {</div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_bool_or()->add_literals(<a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>));</div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  }</div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->clear_enforcement_literal();</div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  }</div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span> </div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  <span class="comment">// Inspects the literals and deal with fixed ones.</span></div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  <span class="keywordtype">bool</span> changed = <span class="keyword">false</span>;</div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a436752c51b5f6010033151b7bd7966da">tmp_literals</a>.clear();</div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aeb77639debea43978becf1d990581537">tmp_literal_set</a>.clear();</div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a> : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->bool_or().literals()) {</div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a9f3443b281c705edf1779f746637ad9b">LiteralIsFalse</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>)) {</div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  changed = <span class="keyword">true</span>;</div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  }</div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a890f923209473cf55ac002d1b14bd9e2">LiteralIsTrue</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>)) {</div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"bool_or: always true"</span>);</div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  }</div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  <span class="comment">// We can just set the variable to true in this case since it is not</span></div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  <span class="comment">// used in any other constraint (note that we artificially bump the</span></div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <span class="comment">// objective var usage by 1).</span></div><div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a54cf7f0077717d59a828b656b60c1615">VariableIsUniqueAndRemovable</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>)) {</div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"bool_or: singleton"</span>);</div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a37ed950834f3f3b427a707631fd745f4">SetLiteralToTrue</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>)) <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  }</div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aeb77639debea43978becf1d990581537">tmp_literal_set</a>.contains(<a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>))) {</div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"bool_or: always true"</span>);</div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  }</div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span> </div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aeb77639debea43978becf1d990581537">tmp_literal_set</a>.contains(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>)) {</div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  changed = <span class="keyword">true</span>;</div><div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aeb77639debea43978becf1d990581537">tmp_literal_set</a>.insert(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>);</div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a436752c51b5f6010033151b7bd7966da">tmp_literals</a>.push_back(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>);</div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  }</div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  }</div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aeb77639debea43978becf1d990581537">tmp_literal_set</a>.clear();</div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span> </div><div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a436752c51b5f6010033151b7bd7966da">tmp_literals</a>.empty()) {</div><div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"bool_or: empty"</span>);</div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <span class="keywordflow">return</span> context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5aa53538ba8adaa0bea1c3c0727425b0">NotifyThatModelIsUnsat</a>();</div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  }</div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a436752c51b5f6010033151b7bd7966da">tmp_literals</a>.size() == 1) {</div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"bool_or: only one literal"</span>);</div><div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a37ed950834f3f3b427a707631fd745f4">SetLiteralToTrue</a>(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a436752c51b5f6010033151b7bd7966da">tmp_literals</a>[0])) <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  }</div><div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a436752c51b5f6010033151b7bd7966da">tmp_literals</a>.size() == 2) {</div><div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  <span class="comment">// For consistency, we move all "implication" into half-reified bool_and.</span></div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  <span class="comment">// TODO(user): merge by enforcement literal and detect implication cycles.</span></div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"bool_or: implications"</span>);</div><div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->add_enforcement_literal(<a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a436752c51b5f6010033151b7bd7966da">tmp_literals</a>[0]));</div><div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_bool_and()->add_literals(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a436752c51b5f6010033151b7bd7966da">tmp_literals</a>[1]);</div><div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  <span class="keywordflow">return</span> changed;</div><div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  }</div><div class="line"><a name="l00255"></a><span class="lineno"> 255</span> </div><div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  <span class="keywordflow">if</span> (changed) {</div><div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"bool_or: fixed literals"</span>);</div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_bool_or()->mutable_literals()->Clear();</div><div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> lit : context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a436752c51b5f6010033151b7bd7966da">tmp_literals</a>) {</div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_bool_or()->add_literals(lit);</div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  }</div><div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  }</div><div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  <span class="keywordflow">return</span> changed;</div><div class="line"><a name="l00264"></a><span class="lineno"> 264</span> }</div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span> </div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span> <span class="comment">// Note this constraint does not update the constraint graph. Therefore, it</span></div><div class="line"><a name="l00267"></a><span class="lineno"> 267</span> <span class="comment">// assumes that the constraint being marked as false is the constraint being</span></div><div class="line"><a name="l00268"></a><span class="lineno"> 268</span> <span class="comment">// presolved.</span></div><div class="line"><a name="l00269"></a><span class="lineno"> 269</span> ABSL_MUST_USE_RESULT <span class="keywordtype">bool</span> CpModelPresolver::MarkConstraintAsFalse(</div><div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  <span class="keywordflow">if</span> (<a class="code" href="namespaceoperations__research_1_1sat.html#a42a3b266d8c6dfab1c14baa6c04e2333">HasEnforcementLiteral</a>(*<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) {</div><div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  <span class="comment">// Change the constraint to a bool_or.</span></div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_bool_or()->clear_literals();</div><div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> lit : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->enforcement_literal()) {</div><div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_bool_or()->add_literals(<a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(lit));</div><div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  }</div><div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->clear_enforcement_literal();</div><div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  PresolveBoolOr(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  <span class="keywordflow">return</span> context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5aa53538ba8adaa0bea1c3c0727425b0">NotifyThatModelIsUnsat</a>();</div><div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  }</div><div class="line"><a name="l00283"></a><span class="lineno"> 283</span> }</div><div class="line"><a name="l00284"></a><span class="lineno"> 284</span> </div><div class="line"><a name="l00285"></a><span class="lineno"> 285</span> <span class="keywordtype">bool</span> CpModelPresolver::PresolveBoolAnd(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span> </div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  <span class="keywordflow">if</span> (!<a class="code" href="namespaceoperations__research_1_1sat.html#a42a3b266d8c6dfab1c14baa6c04e2333">HasEnforcementLiteral</a>(*<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) {</div><div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"bool_and: non-reified."</span>);</div><div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a> : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->bool_and().literals()) {</div><div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a37ed950834f3f3b427a707631fd745f4">SetLiteralToTrue</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>)) <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  }</div><div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  }</div><div class="line"><a name="l00295"></a><span class="lineno"> 295</span> </div><div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  <span class="keywordtype">bool</span> changed = <span class="keyword">false</span>;</div><div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a436752c51b5f6010033151b7bd7966da">tmp_literals</a>.clear();</div><div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a> : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->bool_and().literals()) {</div><div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a9f3443b281c705edf1779f746637ad9b">LiteralIsFalse</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>)) {</div><div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"bool_and: always false"</span>);</div><div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  <span class="keywordflow">return</span> MarkConstraintAsFalse(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  }</div><div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a890f923209473cf55ac002d1b14bd9e2">LiteralIsTrue</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>)) {</div><div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  changed = <span class="keyword">true</span>;</div><div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  }</div><div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a54cf7f0077717d59a828b656b60c1615">VariableIsUniqueAndRemovable</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>)) {</div><div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  changed = <span class="keyword">true</span>;</div><div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a37ed950834f3f3b427a707631fd745f4">SetLiteralToTrue</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>)) <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  }</div><div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a436752c51b5f6010033151b7bd7966da">tmp_literals</a>.push_back(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>);</div><div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  }</div><div class="line"><a name="l00314"></a><span class="lineno"> 314</span> </div><div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  <span class="comment">// Note that this is not the same behavior as a bool_or:</span></div><div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  <span class="comment">// - bool_or means "at least one", so it is false if empty.</span></div><div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  <span class="comment">// - bool_and means "all literals inside true", so it is true if empty.</span></div><div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a436752c51b5f6010033151b7bd7966da">tmp_literals</a>.empty()) <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l00319"></a><span class="lineno"> 319</span> </div><div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  <span class="keywordflow">if</span> (changed) {</div><div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_bool_and()->mutable_literals()->Clear();</div><div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> lit : context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a436752c51b5f6010033151b7bd7966da">tmp_literals</a>) {</div><div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_bool_and()->add_literals(lit);</div><div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  }</div><div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"bool_and: fixed literals"</span>);</div><div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  }</div><div class="line"><a name="l00327"></a><span class="lineno"> 327</span> </div><div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  <span class="comment">// If a variable can move freely in one direction except for this constraint,</span></div><div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  <span class="comment">// we can make it an equality.</span></div><div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  <span class="comment">//</span></div><div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  <span class="comment">// TODO(user): also consider literal on the other side of the =>.</span></div><div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->enforcement_literal().size() == 1 &&</div><div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->bool_and().literals().size() == 1) {</div><div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> enforcement = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->enforcement_literal(0);</div><div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a34e2cd343e0dfb06af9f67df8c4c3502">VariableWithCostIsUniqueAndRemovable</a>(enforcement)) {</div><div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  <span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = <a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(enforcement);</div><div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  int64_t obj_coeff = <a class="code" href="namespacegtl.html#abce27d097bc5680207b294bdad75f59f">gtl::FindOrDie</a>(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a66fc178adf4c7e56b3a6f1a5e052d3e5">ObjectiveMap</a>(), <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  <span class="keywordflow">if</span> (!<a class="code" href="namespaceoperations__research_1_1sat.html#a217338425de4389014563f1f24331713">RefIsPositive</a>(enforcement)) obj_coeff = -obj_coeff;</div><div class="line"><a name="l00339"></a><span class="lineno"> 339</span> </div><div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  <span class="comment">// The other case where the constraint is redundant is treated elsewhere.</span></div><div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  <span class="keywordflow">if</span> (obj_coeff < 0) {</div><div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"bool_and: dual equality."</span>);</div><div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a8fc1d49d1e1bf7261f15ccc6c23c4b10">StoreBooleanEqualityRelation</a>(enforcement,</div><div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->bool_and().literals(0));</div><div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  }</div><div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  }</div><div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  }</div><div class="line"><a name="l00348"></a><span class="lineno"> 348</span> </div><div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  <span class="keywordflow">return</span> changed;</div><div class="line"><a name="l00350"></a><span class="lineno"> 350</span> }</div><div class="line"><a name="l00351"></a><span class="lineno"> 351</span> </div><div class="line"><a name="l00352"></a><span class="lineno"> 352</span> <span class="keywordtype">bool</span> CpModelPresolver::PresolveAtMostOrExactlyOne(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  <span class="keywordtype">bool</span> is_at_most_one = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->constraint_case() == <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35a60d782b0aafa6f70b6230ffd970b2c6b">ConstraintProto::kAtMostOne</a>;</div><div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  <span class="keyword">const</span> std::string <a class="code" href="default__search_8cc.html#ac673bc430bdc3fdaa09f7becf98ef267">name</a> = is_at_most_one ? <span class="stringliteral">"at_most_one: "</span> : <span class="stringliteral">"exactly_one: "</span>;</div><div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  <span class="keyword">auto</span>* literals = is_at_most_one</div><div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  ? <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_at_most_one()->mutable_literals()</div><div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_exactly_one()->mutable_literals();</div><div class="line"><a name="l00358"></a><span class="lineno"> 358</span> </div><div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  <span class="comment">// Deal with duplicate variable reference.</span></div><div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aeb77639debea43978becf1d990581537">tmp_literal_set</a>.clear();</div><div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a> : *literals) {</div><div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aeb77639debea43978becf1d990581537">tmp_literal_set</a>.contains(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>)) {</div><div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ad0d1a630c07ba2321cf43d97a425bc30">SetLiteralToFalse</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>)) <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(absl::StrCat(<a class="code" href="default__search_8cc.html#ac673bc430bdc3fdaa09f7becf98ef267">name</a>, <span class="stringliteral">"duplicate literals"</span>));</div><div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  }</div><div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aeb77639debea43978becf1d990581537">tmp_literal_set</a>.contains(<a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>))) {</div><div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  <span class="keywordtype">int</span> num_positive = 0;</div><div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  <span class="keywordtype">int</span> num_negative = 0;</div><div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> other : *literals) {</div><div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  <span class="keywordflow">if</span> (<a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(other) != <a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>)) {</div><div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ad0d1a630c07ba2321cf43d97a425bc30">SetLiteralToFalse</a>(other)) <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(absl::StrCat(<a class="code" href="default__search_8cc.html#ac673bc430bdc3fdaa09f7becf98ef267">name</a>, <span class="stringliteral">"x and not(x)"</span>));</div><div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  <span class="keywordflow">if</span> (other == <a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>) {</div><div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  ++num_positive;</div><div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  ++num_negative;</div><div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  }</div><div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  }</div><div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  }</div><div class="line"><a name="l00381"></a><span class="lineno"> 381</span> </div><div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  <span class="comment">// This is tricky for the case where the at most one reduce to (lit,</span></div><div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  <span class="comment">// not(lit), not(lit)) for instance.</span></div><div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  <span class="keywordflow">if</span> (num_positive > 1 && !context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ad0d1a630c07ba2321cf43d97a425bc30">SetLiteralToFalse</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>)) {</div><div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  }</div><div class="line"><a name="l00387"></a><span class="lineno"> 387</span>  <span class="keywordflow">if</span> (num_negative > 1 && !context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a37ed950834f3f3b427a707631fd745f4">SetLiteralToTrue</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>)) {</div><div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  }</div><div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  }</div><div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aeb77639debea43978becf1d990581537">tmp_literal_set</a>.insert(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>);</div><div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  }</div><div class="line"><a name="l00394"></a><span class="lineno"> 394</span> </div><div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  <span class="comment">// Remove fixed variables.</span></div><div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  <span class="keywordtype">bool</span> changed = <span class="keyword">false</span>;</div><div class="line"><a name="l00397"></a><span class="lineno"> 397</span>  <span class="keywordtype">bool</span> transform_to_at_most_one = <span class="keyword">false</span>;</div><div class="line"><a name="l00398"></a><span class="lineno"> 398</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a436752c51b5f6010033151b7bd7966da">tmp_literals</a>.clear();</div><div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a> : *literals) {</div><div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a890f923209473cf55ac002d1b14bd9e2">LiteralIsTrue</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>)) {</div><div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(absl::StrCat(<a class="code" href="default__search_8cc.html#ac673bc430bdc3fdaa09f7becf98ef267">name</a>, <span class="stringliteral">"satisfied"</span>));</div><div class="line"><a name="l00402"></a><span class="lineno"> 402</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> other : *literals) {</div><div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  <span class="keywordflow">if</span> (other != <a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>) {</div><div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ad0d1a630c07ba2321cf43d97a425bc30">SetLiteralToFalse</a>(other)) <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  }</div><div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  }</div><div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  }</div><div class="line"><a name="l00409"></a><span class="lineno"> 409</span> </div><div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a9f3443b281c705edf1779f746637ad9b">LiteralIsFalse</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>)) {</div><div class="line"><a name="l00411"></a><span class="lineno"> 411</span>  changed = <span class="keyword">true</span>;</div><div class="line"><a name="l00412"></a><span class="lineno"> 412</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  }</div><div class="line"><a name="l00414"></a><span class="lineno"> 414</span> </div><div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  <span class="comment">// A singleton variable in an at most one can just be set to zero.</span></div><div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  <span class="comment">//</span></div><div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  <span class="comment">// In an exactly one, it can be left to the postsolve to decide, and the</span></div><div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  <span class="comment">// rest of the constraint can be transformed to an at most one.</span></div><div class="line"><a name="l00419"></a><span class="lineno"> 419</span>  <span class="keywordtype">bool</span> is_removable = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a54cf7f0077717d59a828b656b60c1615">VariableIsUniqueAndRemovable</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>);</div><div class="line"><a name="l00420"></a><span class="lineno"> 420</span>  <span class="keywordflow">if</span> (is_at_most_one && !is_removable &&</div><div class="line"><a name="l00421"></a><span class="lineno"> 421</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a34e2cd343e0dfb06af9f67df8c4c3502">VariableWithCostIsUniqueAndRemovable</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>)) {</div><div class="line"><a name="l00422"></a><span class="lineno"> 422</span>  <span class="keyword">const</span> <span class="keyword">auto</span> it = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a66fc178adf4c7e56b3a6f1a5e052d3e5">ObjectiveMap</a>().find(<a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>));</div><div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  <a class="code" href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a>(it != context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a66fc178adf4c7e56b3a6f1a5e052d3e5">ObjectiveMap</a>().end());</div><div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  <span class="keyword">const</span> int64_t coeff = it->second;</div><div class="line"><a name="l00425"></a><span class="lineno"> 425</span> </div><div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  <span class="comment">// Fixing it to zero need to go in the correct direction.</span></div><div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  is_removable = (coeff > 0) == <a class="code" href="namespaceoperations__research_1_1sat.html#a217338425de4389014563f1f24331713">RefIsPositive</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>);</div><div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  }</div><div class="line"><a name="l00429"></a><span class="lineno"> 429</span> </div><div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  <span class="keywordflow">if</span> (is_removable) {</div><div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  <span class="keywordflow">if</span> (is_at_most_one) {</div><div class="line"><a name="l00432"></a><span class="lineno"> 432</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"at_most_one: singleton"</span>);</div><div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ad0d1a630c07ba2321cf43d97a425bc30">SetLiteralToFalse</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>)) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00434"></a><span class="lineno"> 434</span>  changed = <span class="keyword">true</span>;</div><div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l00436"></a><span class="lineno"> 436</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  changed = <span class="keyword">true</span>;</div><div class="line"><a name="l00438"></a><span class="lineno"> 438</span>  is_at_most_one = <span class="keyword">true</span>;</div><div class="line"><a name="l00439"></a><span class="lineno"> 439</span>  transform_to_at_most_one = <span class="keyword">true</span>;</div><div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  *(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a4b3b9ef9c5f214dd4427daa2646eceda">mapping_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>()) = *<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>;</div><div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"exactly_one: singleton"</span>);</div><div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a6939dc7b9db01cf3deff10405e260461">MarkVariableAsRemoved</a>(<a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>));</div><div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  }</div><div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  }</div><div class="line"><a name="l00446"></a><span class="lineno"> 446</span> </div><div class="line"><a name="l00447"></a><span class="lineno"> 447</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a436752c51b5f6010033151b7bd7966da">tmp_literals</a>.push_back(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>);</div><div class="line"><a name="l00448"></a><span class="lineno"> 448</span>  }</div><div class="line"><a name="l00449"></a><span class="lineno"> 449</span> </div><div class="line"><a name="l00450"></a><span class="lineno"> 450</span>  <span class="keywordflow">if</span> (!is_at_most_one && !transform_to_at_most_one &&</div><div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ae42cae46d8792621471dd137bf9bb3cc">ExploitExactlyOneInObjective</a>(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a436752c51b5f6010033151b7bd7966da">tmp_literals</a>)) {</div><div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"exactly_one: simplified objective"</span>);</div><div class="line"><a name="l00453"></a><span class="lineno"> 453</span>  }</div><div class="line"><a name="l00454"></a><span class="lineno"> 454</span> </div><div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  <span class="keywordflow">if</span> (transform_to_at_most_one) {</div><div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  <a class="code" href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a>(changed);</div><div class="line"><a name="l00457"></a><span class="lineno"> 457</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->Clear();</div><div class="line"><a name="l00458"></a><span class="lineno"> 458</span>  literals = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_at_most_one()->mutable_literals();</div><div class="line"><a name="l00459"></a><span class="lineno"> 459</span>  }</div><div class="line"><a name="l00460"></a><span class="lineno"> 460</span>  <span class="keywordflow">if</span> (changed) {</div><div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  literals->Clear();</div><div class="line"><a name="l00462"></a><span class="lineno"> 462</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> lit : context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a436752c51b5f6010033151b7bd7966da">tmp_literals</a>) {</div><div class="line"><a name="l00463"></a><span class="lineno"> 463</span>  literals->Add(lit);</div><div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  }</div><div class="line"><a name="l00465"></a><span class="lineno"> 465</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(absl::StrCat(<a class="code" href="default__search_8cc.html#ac673bc430bdc3fdaa09f7becf98ef267">name</a>, <span class="stringliteral">"removed literals"</span>));</div><div class="line"><a name="l00466"></a><span class="lineno"> 466</span>  }</div><div class="line"><a name="l00467"></a><span class="lineno"> 467</span>  <span class="keywordflow">return</span> changed;</div><div class="line"><a name="l00468"></a><span class="lineno"> 468</span> }</div><div class="line"><a name="l00469"></a><span class="lineno"> 469</span> </div><div class="line"><a name="l00470"></a><span class="lineno"> 470</span> <span class="keywordtype">bool</span> CpModelPresolver::PresolveAtMostOne(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l00471"></a><span class="lineno"> 471</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  <a class="code" href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a>(!<a class="code" href="namespaceoperations__research_1_1sat.html#a42a3b266d8c6dfab1c14baa6c04e2333">HasEnforcementLiteral</a>(*<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>));</div><div class="line"><a name="l00473"></a><span class="lineno"> 473</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> changed = PresolveAtMostOrExactlyOne(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l00474"></a><span class="lineno"> 474</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->constraint_case() != <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35a60d782b0aafa6f70b6230ffd970b2c6b">ConstraintProto::kAtMostOne</a>) <span class="keywordflow">return</span> changed;</div><div class="line"><a name="l00475"></a><span class="lineno"> 475</span> </div><div class="line"><a name="l00476"></a><span class="lineno"> 476</span>  <span class="comment">// Size zero: ok.</span></div><div class="line"><a name="l00477"></a><span class="lineno"> 477</span>  <span class="keyword">const</span> <span class="keyword">auto</span>& literals = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->at_most_one().literals();</div><div class="line"><a name="l00478"></a><span class="lineno"> 478</span>  <span class="keywordflow">if</span> (literals.empty()) {</div><div class="line"><a name="l00479"></a><span class="lineno"> 479</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"at_most_one: empty or all false"</span>);</div><div class="line"><a name="l00480"></a><span class="lineno"> 480</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l00481"></a><span class="lineno"> 481</span>  }</div><div class="line"><a name="l00482"></a><span class="lineno"> 482</span> </div><div class="line"><a name="l00483"></a><span class="lineno"> 483</span>  <span class="comment">// Size one: always satisfied.</span></div><div class="line"><a name="l00484"></a><span class="lineno"> 484</span>  <span class="keywordflow">if</span> (literals.size() == 1) {</div><div class="line"><a name="l00485"></a><span class="lineno"> 485</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"at_most_one: size one"</span>);</div><div class="line"><a name="l00486"></a><span class="lineno"> 486</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l00487"></a><span class="lineno"> 487</span>  }</div><div class="line"><a name="l00488"></a><span class="lineno"> 488</span> </div><div class="line"><a name="l00489"></a><span class="lineno"> 489</span>  <span class="keywordflow">return</span> changed;</div><div class="line"><a name="l00490"></a><span class="lineno"> 490</span> }</div><div class="line"><a name="l00491"></a><span class="lineno"> 491</span> </div><div class="line"><a name="l00492"></a><span class="lineno"> 492</span> <span class="keywordtype">bool</span> CpModelPresolver::PresolveExactlyOne(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l00493"></a><span class="lineno"> 493</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00494"></a><span class="lineno"> 494</span>  <a class="code" href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a>(!<a class="code" href="namespaceoperations__research_1_1sat.html#a42a3b266d8c6dfab1c14baa6c04e2333">HasEnforcementLiteral</a>(*<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>));</div><div class="line"><a name="l00495"></a><span class="lineno"> 495</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> changed = PresolveAtMostOrExactlyOne(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l00496"></a><span class="lineno"> 496</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->constraint_case() != <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35ad60570d9bed938f8b11385a7ba7f3508">ConstraintProto::kExactlyOne</a>) <span class="keywordflow">return</span> changed;</div><div class="line"><a name="l00497"></a><span class="lineno"> 497</span> </div><div class="line"><a name="l00498"></a><span class="lineno"> 498</span>  <span class="comment">// Size zero: UNSAT.</span></div><div class="line"><a name="l00499"></a><span class="lineno"> 499</span>  <span class="keyword">const</span> <span class="keyword">auto</span>& literals = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->exactly_one().literals();</div><div class="line"><a name="l00500"></a><span class="lineno"> 500</span>  <span class="keywordflow">if</span> (literals.empty()) {</div><div class="line"><a name="l00501"></a><span class="lineno"> 501</span>  <span class="keywordflow">return</span> context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5aa53538ba8adaa0bea1c3c0727425b0">NotifyThatModelIsUnsat</a>(<span class="stringliteral">"exactly_one: empty or all false"</span>);</div><div class="line"><a name="l00502"></a><span class="lineno"> 502</span>  }</div><div class="line"><a name="l00503"></a><span class="lineno"> 503</span> </div><div class="line"><a name="l00504"></a><span class="lineno"> 504</span>  <span class="comment">// Size one: fix variable.</span></div><div class="line"><a name="l00505"></a><span class="lineno"> 505</span>  <span class="keywordflow">if</span> (literals.size() == 1) {</div><div class="line"><a name="l00506"></a><span class="lineno"> 506</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"exactly_one: size one"</span>);</div><div class="line"><a name="l00507"></a><span class="lineno"> 507</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a37ed950834f3f3b427a707631fd745f4">SetLiteralToTrue</a>(literals[0])) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00508"></a><span class="lineno"> 508</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l00509"></a><span class="lineno"> 509</span>  }</div><div class="line"><a name="l00510"></a><span class="lineno"> 510</span> </div><div class="line"><a name="l00511"></a><span class="lineno"> 511</span>  <span class="comment">// Size two: Equivalence.</span></div><div class="line"><a name="l00512"></a><span class="lineno"> 512</span>  <span class="keywordflow">if</span> (literals.size() == 2) {</div><div class="line"><a name="l00513"></a><span class="lineno"> 513</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"exactly_one: size two"</span>);</div><div class="line"><a name="l00514"></a><span class="lineno"> 514</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a8fc1d49d1e1bf7261f15ccc6c23c4b10">StoreBooleanEqualityRelation</a>(literals[0],</div><div class="line"><a name="l00515"></a><span class="lineno"> 515</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(literals[1]));</div><div class="line"><a name="l00516"></a><span class="lineno"> 516</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l00517"></a><span class="lineno"> 517</span>  }</div><div class="line"><a name="l00518"></a><span class="lineno"> 518</span> </div><div class="line"><a name="l00519"></a><span class="lineno"> 519</span>  <span class="keywordflow">return</span> changed;</div><div class="line"><a name="l00520"></a><span class="lineno"> 520</span> }</div><div class="line"><a name="l00521"></a><span class="lineno"> 521</span> </div><div class="line"><a name="l00522"></a><span class="lineno"> 522</span> <span class="keywordtype">bool</span> CpModelPresolver::PresolveIntMax(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l00523"></a><span class="lineno"> 523</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00524"></a><span class="lineno"> 524</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_max().vars().empty()) {</div><div class="line"><a name="l00525"></a><span class="lineno"> 525</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"int_max: no variables!"</span>);</div><div class="line"><a name="l00526"></a><span class="lineno"> 526</span>  <span class="keywordflow">return</span> MarkConstraintAsFalse(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l00527"></a><span class="lineno"> 527</span>  }</div><div class="line"><a name="l00528"></a><span class="lineno"> 528</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> target_ref = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_max().target();</div><div class="line"><a name="l00529"></a><span class="lineno"> 529</span> </div><div class="line"><a name="l00530"></a><span class="lineno"> 530</span>  <span class="comment">// Pass 1, compute the infered min of the target, and remove duplicates.</span></div><div class="line"><a name="l00531"></a><span class="lineno"> 531</span>  int64_t infered_min = <a class="code" href="alldiff__cst_8cc.html#ad10edae0a852d72fb76afb1c77735045">std::numeric_limits<int64_t>::min</a>();</div><div class="line"><a name="l00532"></a><span class="lineno"> 532</span>  int64_t infered_max = <a class="code" href="alldiff__cst_8cc.html#ad10edae0a852d72fb76afb1c77735045">std::numeric_limits<int64_t>::min</a>();</div><div class="line"><a name="l00533"></a><span class="lineno"> 533</span>  <span class="keywordtype">bool</span> contains_target_ref = <span class="keyword">false</span>;</div><div class="line"><a name="l00534"></a><span class="lineno"> 534</span>  <span class="keywordtype">bool</span> contains_negated_target_ref = <span class="keyword">false</span>;</div><div class="line"><a name="l00535"></a><span class="lineno"> 535</span>  std::set<int> used_ref;</div><div class="line"><a name="l00536"></a><span class="lineno"> 536</span>  <span class="keywordtype">int</span> new_size = 0;</div><div class="line"><a name="l00537"></a><span class="lineno"> 537</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> ref : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_max().vars()) {</div><div class="line"><a name="l00538"></a><span class="lineno"> 538</span>  <span class="keywordflow">if</span> (ref == target_ref) contains_target_ref = <span class="keyword">true</span>;</div><div class="line"><a name="l00539"></a><span class="lineno"> 539</span>  <span class="keywordflow">if</span> (<a class="code" href="namespacegtl.html#aae28e97bd1fa93cb0032642550da7455">gtl::ContainsKey</a>(used_ref, ref)) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l00540"></a><span class="lineno"> 540</span>  <span class="keywordflow">if</span> (<a class="code" href="namespacegtl.html#aae28e97bd1fa93cb0032642550da7455">gtl::ContainsKey</a>(used_ref, <a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(ref)) ||</div><div class="line"><a name="l00541"></a><span class="lineno"> 541</span>  ref == <a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(target_ref)) {</div><div class="line"><a name="l00542"></a><span class="lineno"> 542</span>  infered_min = <a class="code" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::max</a>(infered_min, int64_t{0});</div><div class="line"><a name="l00543"></a><span class="lineno"> 543</span>  }</div><div class="line"><a name="l00544"></a><span class="lineno"> 544</span>  <span class="keywordflow">if</span> (ref == <a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(target_ref)) {</div><div class="line"><a name="l00545"></a><span class="lineno"> 545</span>  <span class="comment">// x must be non-negative.</span></div><div class="line"><a name="l00546"></a><span class="lineno"> 546</span>  <span class="comment">// It can be positive if they are other terms, otherwise it must be zero.</span></div><div class="line"><a name="l00547"></a><span class="lineno"> 547</span>  <span class="comment">// TODO(user): more presolve in this case?</span></div><div class="line"><a name="l00548"></a><span class="lineno"> 548</span>  contains_negated_target_ref = <span class="keyword">true</span>;</div><div class="line"><a name="l00549"></a><span class="lineno"> 549</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"int_max: x = max(-x, ...)"</span>);</div><div class="line"><a name="l00550"></a><span class="lineno"> 550</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(</div><div class="line"><a name="l00551"></a><span class="lineno"> 551</span>  target_ref, {0, std::numeric_limits<int64_t>::max()})) {</div><div class="line"><a name="l00552"></a><span class="lineno"> 552</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00553"></a><span class="lineno"> 553</span>  }</div><div class="line"><a name="l00554"></a><span class="lineno"> 554</span>  }</div><div class="line"><a name="l00555"></a><span class="lineno"> 555</span>  used_ref.insert(ref);</div><div class="line"><a name="l00556"></a><span class="lineno"> 556</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_int_max()->set_vars(new_size++, ref);</div><div class="line"><a name="l00557"></a><span class="lineno"> 557</span>  infered_min = <a class="code" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::max</a>(infered_min, context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(ref));</div><div class="line"><a name="l00558"></a><span class="lineno"> 558</span>  infered_max = <a class="code" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::max</a>(infered_max, context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a00f995618e00d575372ff823a12553a9">MaxOf</a>(ref));</div><div class="line"><a name="l00559"></a><span class="lineno"> 559</span>  }</div><div class="line"><a name="l00560"></a><span class="lineno"> 560</span>  <span class="keywordflow">if</span> (new_size < ct->int_max().vars_size()) {</div><div class="line"><a name="l00561"></a><span class="lineno"> 561</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"int_max: removed dup"</span>);</div><div class="line"><a name="l00562"></a><span class="lineno"> 562</span>  }</div><div class="line"><a name="l00563"></a><span class="lineno"> 563</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_int_max()->mutable_vars()->Truncate(new_size);</div><div class="line"><a name="l00564"></a><span class="lineno"> 564</span> </div><div class="line"><a name="l00565"></a><span class="lineno"> 565</span>  <span class="keywordflow">if</span> (contains_target_ref) {</div><div class="line"><a name="l00566"></a><span class="lineno"> 566</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"int_max: x = max(x, ...)"</span>);</div><div class="line"><a name="l00567"></a><span class="lineno"> 567</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> ref : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_max().vars()) {</div><div class="line"><a name="l00568"></a><span class="lineno"> 568</span>  <span class="keywordflow">if</span> (ref == target_ref) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l00569"></a><span class="lineno"> 569</span>  ConstraintProto* new_ct = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>();</div><div class="line"><a name="l00570"></a><span class="lineno"> 570</span>  *new_ct-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a30bb8cd86cbd9eae09b21783f28f8967">mutable_enforcement_literal</a>() = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->enforcement_literal();</div><div class="line"><a name="l00571"></a><span class="lineno"> 571</span>  <span class="keyword">auto</span>* arg = new_ct->mutable_linear();</div><div class="line"><a name="l00572"></a><span class="lineno"> 572</span>  arg->add_vars(target_ref);</div><div class="line"><a name="l00573"></a><span class="lineno"> 573</span>  arg->add_coeffs(1);</div><div class="line"><a name="l00574"></a><span class="lineno"> 574</span>  arg->add_vars(ref);</div><div class="line"><a name="l00575"></a><span class="lineno"> 575</span>  arg->add_coeffs(-1);</div><div class="line"><a name="l00576"></a><span class="lineno"> 576</span>  arg->add_domain(0);</div><div class="line"><a name="l00577"></a><span class="lineno"> 577</span>  arg->add_domain(<a class="code" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::numeric_limits<int64_t>::max</a>());</div><div class="line"><a name="l00578"></a><span class="lineno"> 578</span>  }</div><div class="line"><a name="l00579"></a><span class="lineno"> 579</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l00580"></a><span class="lineno"> 580</span>  }</div><div class="line"><a name="l00581"></a><span class="lineno"> 581</span> </div><div class="line"><a name="l00582"></a><span class="lineno"> 582</span>  <span class="comment">// Compute the infered target_domain.</span></div><div class="line"><a name="l00583"></a><span class="lineno"> 583</span>  Domain infered_domain;</div><div class="line"><a name="l00584"></a><span class="lineno"> 584</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> ref : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_max().vars()) {</div><div class="line"><a name="l00585"></a><span class="lineno"> 585</span>  infered_domain = infered_domain.UnionWith(</div><div class="line"><a name="l00586"></a><span class="lineno"> 586</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(ref).<a class="code" href="classoperations__research_1_1_domain.html#a835826c4c5129b74553042a357a721ff">IntersectionWith</a>({infered_min, infered_max}));</div><div class="line"><a name="l00587"></a><span class="lineno"> 587</span>  }</div><div class="line"><a name="l00588"></a><span class="lineno"> 588</span> </div><div class="line"><a name="l00589"></a><span class="lineno"> 589</span>  <span class="comment">// Update the target domain.</span></div><div class="line"><a name="l00590"></a><span class="lineno"> 590</span>  <span class="keywordtype">bool</span> domain_reduced = <span class="keyword">false</span>;</div><div class="line"><a name="l00591"></a><span class="lineno"> 591</span>  <span class="keywordflow">if</span> (!<a class="code" href="namespaceoperations__research_1_1sat.html#a42a3b266d8c6dfab1c14baa6c04e2333">HasEnforcementLiteral</a>(*<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) {</div><div class="line"><a name="l00592"></a><span class="lineno"> 592</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(target_ref, infered_domain,</div><div class="line"><a name="l00593"></a><span class="lineno"> 593</span>  &domain_reduced)) {</div><div class="line"><a name="l00594"></a><span class="lineno"> 594</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00595"></a><span class="lineno"> 595</span>  }</div><div class="line"><a name="l00596"></a><span class="lineno"> 596</span>  }</div><div class="line"><a name="l00597"></a><span class="lineno"> 597</span> </div><div class="line"><a name="l00598"></a><span class="lineno"> 598</span>  <span class="comment">// If the target is only used here and if</span></div><div class="line"><a name="l00599"></a><span class="lineno"> 599</span>  <span class="comment">// infered_domain ∩ [kint64min, target_ub] ⊂ target_domain</span></div><div class="line"><a name="l00600"></a><span class="lineno"> 600</span>  <span class="comment">// then the constraint is really max(...) <= target_ub and we can simplify it.</span></div><div class="line"><a name="l00601"></a><span class="lineno"> 601</span>  <span class="comment">//</span></div><div class="line"><a name="l00602"></a><span class="lineno"> 602</span>  <span class="comment">// This is not as easy if x = max(-x, ...) so we skip this case.</span></div><div class="line"><a name="l00603"></a><span class="lineno"> 603</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a54cf7f0077717d59a828b656b60c1615">VariableIsUniqueAndRemovable</a>(target_ref) &&</div><div class="line"><a name="l00604"></a><span class="lineno"> 604</span>  !contains_negated_target_ref) {</div><div class="line"><a name="l00605"></a><span class="lineno"> 605</span>  <span class="keyword">const</span> Domain& target_domain = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(target_ref);</div><div class="line"><a name="l00606"></a><span class="lineno"> 606</span>  <span class="keywordflow">if</span> (infered_domain</div><div class="line"><a name="l00607"></a><span class="lineno"> 607</span>  .IntersectionWith(Domain(<a class="code" href="alldiff__cst_8cc.html#ad10edae0a852d72fb76afb1c77735045">std::numeric_limits<int64_t>::min</a>(),</div><div class="line"><a name="l00608"></a><span class="lineno"> 608</span>  target_domain.Max()))</div><div class="line"><a name="l00609"></a><span class="lineno"> 609</span>  .IsIncludedIn(target_domain)) {</div><div class="line"><a name="l00610"></a><span class="lineno"> 610</span>  <span class="keywordflow">if</span> (infered_domain.Max() <= target_domain.Max()) {</div><div class="line"><a name="l00611"></a><span class="lineno"> 611</span>  <span class="comment">// The constraint is always satisfiable.</span></div><div class="line"><a name="l00612"></a><span class="lineno"> 612</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"int_max: always true"</span>);</div><div class="line"><a name="l00613"></a><span class="lineno"> 613</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->enforcement_literal().empty()) {</div><div class="line"><a name="l00614"></a><span class="lineno"> 614</span>  <span class="comment">// The constraint just restrict the upper bound of its variable.</span></div><div class="line"><a name="l00615"></a><span class="lineno"> 615</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> ref : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_max().vars()) {</div><div class="line"><a name="l00616"></a><span class="lineno"> 616</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"int_max: lower than constant"</span>);</div><div class="line"><a name="l00617"></a><span class="lineno"> 617</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(</div><div class="line"><a name="l00618"></a><span class="lineno"> 618</span>  ref, Domain(<a class="code" href="alldiff__cst_8cc.html#ad10edae0a852d72fb76afb1c77735045">std::numeric_limits<int64_t>::min</a>(),</div><div class="line"><a name="l00619"></a><span class="lineno"> 619</span>  target_domain.Max()))) {</div><div class="line"><a name="l00620"></a><span class="lineno"> 620</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00621"></a><span class="lineno"> 621</span>  }</div><div class="line"><a name="l00622"></a><span class="lineno"> 622</span>  }</div><div class="line"><a name="l00623"></a><span class="lineno"> 623</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00624"></a><span class="lineno"> 624</span>  <span class="comment">// We simply transform this into n reified constraints</span></div><div class="line"><a name="l00625"></a><span class="lineno"> 625</span>  <span class="comment">// enforcement => [var_i <= target_domain.Max()].</span></div><div class="line"><a name="l00626"></a><span class="lineno"> 626</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"int_max: reified lower than constant"</span>);</div><div class="line"><a name="l00627"></a><span class="lineno"> 627</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> ref : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_max().vars()) {</div><div class="line"><a name="l00628"></a><span class="lineno"> 628</span>  ConstraintProto* new_ct = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>();</div><div class="line"><a name="l00629"></a><span class="lineno"> 629</span>  *(new_ct->mutable_enforcement_literal()) = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->enforcement_literal();</div><div class="line"><a name="l00630"></a><span class="lineno"> 630</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_linear()->add_vars(ref);</div><div class="line"><a name="l00631"></a><span class="lineno"> 631</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_linear()->add_coeffs(1);</div><div class="line"><a name="l00632"></a><span class="lineno"> 632</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_linear()->add_domain(<a class="code" href="alldiff__cst_8cc.html#ad10edae0a852d72fb76afb1c77735045">std::numeric_limits<int64_t>::min</a>());</div><div class="line"><a name="l00633"></a><span class="lineno"> 633</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_linear()->add_domain(target_domain.Max());</div><div class="line"><a name="l00634"></a><span class="lineno"> 634</span>  }</div><div class="line"><a name="l00635"></a><span class="lineno"> 635</span>  }</div><div class="line"><a name="l00636"></a><span class="lineno"> 636</span> </div><div class="line"><a name="l00637"></a><span class="lineno"> 637</span>  <span class="comment">// In all cases we delete the original constraint.</span></div><div class="line"><a name="l00638"></a><span class="lineno"> 638</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a6939dc7b9db01cf3deff10405e260461">MarkVariableAsRemoved</a>(target_ref);</div><div class="line"><a name="l00639"></a><span class="lineno"> 639</span>  *(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a4b3b9ef9c5f214dd4427daa2646eceda">mapping_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>()) = *<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>;</div><div class="line"><a name="l00640"></a><span class="lineno"> 640</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l00641"></a><span class="lineno"> 641</span>  }</div><div class="line"><a name="l00642"></a><span class="lineno"> 642</span>  }</div><div class="line"><a name="l00643"></a><span class="lineno"> 643</span> </div><div class="line"><a name="l00644"></a><span class="lineno"> 644</span>  <span class="comment">// Pass 2, update the argument domains. Filter them eventually.</span></div><div class="line"><a name="l00645"></a><span class="lineno"> 645</span>  new_size = 0;</div><div class="line"><a name="l00646"></a><span class="lineno"> 646</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> size = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_max().vars_size();</div><div class="line"><a name="l00647"></a><span class="lineno"> 647</span>  <span class="keyword">const</span> int64_t target_max = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a00f995618e00d575372ff823a12553a9">MaxOf</a>(target_ref);</div><div class="line"><a name="l00648"></a><span class="lineno"> 648</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> ref : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_max().vars()) {</div><div class="line"><a name="l00649"></a><span class="lineno"> 649</span>  <span class="keywordflow">if</span> (!<a class="code" href="namespaceoperations__research_1_1sat.html#a42a3b266d8c6dfab1c14baa6c04e2333">HasEnforcementLiteral</a>(*<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) {</div><div class="line"><a name="l00650"></a><span class="lineno"> 650</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(</div><div class="line"><a name="l00651"></a><span class="lineno"> 651</span>  ref, Domain(<a class="code" href="alldiff__cst_8cc.html#ad10edae0a852d72fb76afb1c77735045">std::numeric_limits<int64_t>::min</a>(), target_max),</div><div class="line"><a name="l00652"></a><span class="lineno"> 652</span>  &domain_reduced)) {</div><div class="line"><a name="l00653"></a><span class="lineno"> 653</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00654"></a><span class="lineno"> 654</span>  }</div><div class="line"><a name="l00655"></a><span class="lineno"> 655</span>  }</div><div class="line"><a name="l00656"></a><span class="lineno"> 656</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a00f995618e00d575372ff823a12553a9">MaxOf</a>(ref) >= infered_min) {</div><div class="line"><a name="l00657"></a><span class="lineno"> 657</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_int_max()->set_vars(new_size++, ref);</div><div class="line"><a name="l00658"></a><span class="lineno"> 658</span>  }</div><div class="line"><a name="l00659"></a><span class="lineno"> 659</span>  }</div><div class="line"><a name="l00660"></a><span class="lineno"> 660</span>  <span class="keywordflow">if</span> (domain_reduced) {</div><div class="line"><a name="l00661"></a><span class="lineno"> 661</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"int_max: reduced domains"</span>);</div><div class="line"><a name="l00662"></a><span class="lineno"> 662</span>  }</div><div class="line"><a name="l00663"></a><span class="lineno"> 663</span> </div><div class="line"><a name="l00664"></a><span class="lineno"> 664</span>  <span class="keywordtype">bool</span> modified = <span class="keyword">false</span>;</div><div class="line"><a name="l00665"></a><span class="lineno"> 665</span>  <span class="keywordflow">if</span> (new_size < size) {</div><div class="line"><a name="l00666"></a><span class="lineno"> 666</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"int_max: removed variables"</span>);</div><div class="line"><a name="l00667"></a><span class="lineno"> 667</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_int_max()->mutable_vars()->Truncate(new_size);</div><div class="line"><a name="l00668"></a><span class="lineno"> 668</span>  modified = <span class="keyword">true</span>;</div><div class="line"><a name="l00669"></a><span class="lineno"> 669</span>  }</div><div class="line"><a name="l00670"></a><span class="lineno"> 670</span> </div><div class="line"><a name="l00671"></a><span class="lineno"> 671</span>  <span class="keywordflow">if</span> (new_size == 0) {</div><div class="line"><a name="l00672"></a><span class="lineno"> 672</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"int_max: no variables!"</span>);</div><div class="line"><a name="l00673"></a><span class="lineno"> 673</span>  <span class="keywordflow">return</span> MarkConstraintAsFalse(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l00674"></a><span class="lineno"> 674</span>  }</div><div class="line"><a name="l00675"></a><span class="lineno"> 675</span>  <span class="keywordflow">if</span> (new_size == 1) {</div><div class="line"><a name="l00676"></a><span class="lineno"> 676</span>  <span class="comment">// Convert to an equality. Note that we create a new constraint otherwise it</span></div><div class="line"><a name="l00677"></a><span class="lineno"> 677</span>  <span class="comment">// might not be processed again.</span></div><div class="line"><a name="l00678"></a><span class="lineno"> 678</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"int_max: converted to equality"</span>);</div><div class="line"><a name="l00679"></a><span class="lineno"> 679</span>  ConstraintProto* new_ct = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>();</div><div class="line"><a name="l00680"></a><span class="lineno"> 680</span>  *new_ct = *<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>; <span class="comment">// copy name and potential reification.</span></div><div class="line"><a name="l00681"></a><span class="lineno"> 681</span>  <span class="keyword">auto</span>* arg = new_ct->mutable_linear();</div><div class="line"><a name="l00682"></a><span class="lineno"> 682</span>  arg->add_vars(target_ref);</div><div class="line"><a name="l00683"></a><span class="lineno"> 683</span>  arg->add_coeffs(1);</div><div class="line"><a name="l00684"></a><span class="lineno"> 684</span>  arg->add_vars(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_max().vars(0));</div><div class="line"><a name="l00685"></a><span class="lineno"> 685</span>  arg->add_coeffs(-1);</div><div class="line"><a name="l00686"></a><span class="lineno"> 686</span>  arg->add_domain(0);</div><div class="line"><a name="l00687"></a><span class="lineno"> 687</span>  arg->add_domain(0);</div><div class="line"><a name="l00688"></a><span class="lineno"> 688</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l00689"></a><span class="lineno"> 689</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l00690"></a><span class="lineno"> 690</span>  }</div><div class="line"><a name="l00691"></a><span class="lineno"> 691</span> </div><div class="line"><a name="l00692"></a><span class="lineno"> 692</span>  <span class="comment">// TODO(user): Just port all the presolve above to the lin max presolve, so</span></div><div class="line"><a name="l00693"></a><span class="lineno"> 693</span>  <span class="comment">// we can just convert it and not do anything else.</span></div><div class="line"><a name="l00694"></a><span class="lineno"> 694</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->constraint_case() == <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35a4d3274f97b77566895b3a239ed62bb72">ConstraintProto::kIntMax</a>) {</div><div class="line"><a name="l00695"></a><span class="lineno"> 695</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> convert_result = ConvertIntMax(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l00696"></a><span class="lineno"> 696</span>  <span class="keywordflow">return</span> modified || convert_result;</div><div class="line"><a name="l00697"></a><span class="lineno"> 697</span>  }</div><div class="line"><a name="l00698"></a><span class="lineno"> 698</span> </div><div class="line"><a name="l00699"></a><span class="lineno"> 699</span>  <span class="keywordflow">return</span> modified;</div><div class="line"><a name="l00700"></a><span class="lineno"> 700</span> }</div><div class="line"><a name="l00701"></a><span class="lineno"> 701</span> </div><div class="line"><a name="l00702"></a><span class="lineno"> 702</span> <span class="comment">// Convert to lin_max and presolve lin_max.</span></div><div class="line"><a name="l00703"></a><span class="lineno"> 703</span> <span class="keywordtype">bool</span> CpModelPresolver::PresolveLinMin(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l00704"></a><span class="lineno"> 704</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00705"></a><span class="lineno"> 705</span>  <span class="keyword">const</span> <span class="keyword">auto</span> copy = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->lin_min();</div><div class="line"><a name="l00706"></a><span class="lineno"> 706</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a22efb1995471e34caa35927a9032f5f3">SetToNegatedLinearExpression</a>(copy.target(),</div><div class="line"><a name="l00707"></a><span class="lineno"> 707</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_lin_max()->mutable_target());</div><div class="line"><a name="l00708"></a><span class="lineno"> 708</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> LinearExpressionProto& expr : copy.exprs()) {</div><div class="line"><a name="l00709"></a><span class="lineno"> 709</span>  LinearExpressionProto* <span class="keyword">const</span> new_expr = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_lin_max()->add_exprs();</div><div class="line"><a name="l00710"></a><span class="lineno"> 710</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a22efb1995471e34caa35927a9032f5f3">SetToNegatedLinearExpression</a>(expr, new_expr);</div><div class="line"><a name="l00711"></a><span class="lineno"> 711</span>  }</div><div class="line"><a name="l00712"></a><span class="lineno"> 712</span>  <span class="keywordflow">return</span> PresolveLinMax(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l00713"></a><span class="lineno"> 713</span> }</div><div class="line"><a name="l00714"></a><span class="lineno"> 714</span> </div><div class="line"><a name="l00715"></a><span class="lineno"> 715</span> <span class="comment">// We convert it to a "linear" max which allows to replace affine relation and</span></div><div class="line"><a name="l00716"></a><span class="lineno"> 716</span> <span class="comment">// remove the need to keep them in the model.</span></div><div class="line"><a name="l00717"></a><span class="lineno"> 717</span> <span class="comment">//</span></div><div class="line"><a name="l00718"></a><span class="lineno"> 718</span> <span class="comment">// TODO(user): Move to expand. We also need to convert all the int_max presolve</span></div><div class="line"><a name="l00719"></a><span class="lineno"> 719</span> <span class="comment">// (like the absolute value) that we don't have yet in the lin_max format.</span></div><div class="line"><a name="l00720"></a><span class="lineno"> 720</span> <span class="keywordtype">bool</span> CpModelPresolver::ConvertIntMax(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l00721"></a><span class="lineno"> 721</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00722"></a><span class="lineno"> 722</span>  <span class="keyword">const</span> <span class="keyword">auto</span> copy = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_max();</div><div class="line"><a name="l00723"></a><span class="lineno"> 723</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_lin_max()->mutable_target()->add_vars(copy.target());</div><div class="line"><a name="l00724"></a><span class="lineno"> 724</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_lin_max()->mutable_target()->add_coeffs(1);</div><div class="line"><a name="l00725"></a><span class="lineno"> 725</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> ref : copy.vars()) {</div><div class="line"><a name="l00726"></a><span class="lineno"> 726</span>  LinearExpressionProto* expr = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_lin_max()->add_exprs();</div><div class="line"><a name="l00727"></a><span class="lineno"> 727</span>  expr->add_vars(ref);</div><div class="line"><a name="l00728"></a><span class="lineno"> 728</span>  expr->add_coeffs(1);</div><div class="line"><a name="l00729"></a><span class="lineno"> 729</span>  }</div><div class="line"><a name="l00730"></a><span class="lineno"> 730</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"int_max: converted to lin_max"</span>);</div><div class="line"><a name="l00731"></a><span class="lineno"> 731</span>  <span class="keywordflow">return</span> PresolveLinMax(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l00732"></a><span class="lineno"> 732</span> }</div><div class="line"><a name="l00733"></a><span class="lineno"> 733</span> </div><div class="line"><a name="l00734"></a><span class="lineno"> 734</span> <span class="comment">// TODO(user): Add all the missing presolve from PresolveIntMax().</span></div><div class="line"><a name="l00735"></a><span class="lineno"> 735</span> <span class="keywordtype">bool</span> CpModelPresolver::PresolveLinMax(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l00736"></a><span class="lineno"> 736</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00737"></a><span class="lineno"> 737</span> </div><div class="line"><a name="l00738"></a><span class="lineno"> 738</span>  <span class="comment">// Canonicalize all involved expression.</span></div><div class="line"><a name="l00739"></a><span class="lineno"> 739</span>  <span class="comment">//</span></div><div class="line"><a name="l00740"></a><span class="lineno"> 740</span>  <span class="comment">// TODO(user): If we start to have many constraints like this, we should</span></div><div class="line"><a name="l00741"></a><span class="lineno"> 741</span>  <span class="comment">// use reflexion (see cp_model_util) to do that generically.</span></div><div class="line"><a name="l00742"></a><span class="lineno"> 742</span>  <span class="keywordtype">bool</span> changed = CanonicalizeLinearExpression(</div><div class="line"><a name="l00743"></a><span class="lineno"> 743</span>  *<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>, <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_lin_max()->mutable_target());</div><div class="line"><a name="l00744"></a><span class="lineno"> 744</span>  <span class="keywordflow">for</span> (LinearExpressionProto& exp : *(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_lin_max()->mutable_exprs())) {</div><div class="line"><a name="l00745"></a><span class="lineno"> 745</span>  changed |= CanonicalizeLinearExpression(*<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>, &exp);</div><div class="line"><a name="l00746"></a><span class="lineno"> 746</span>  }</div><div class="line"><a name="l00747"></a><span class="lineno"> 747</span> </div><div class="line"><a name="l00748"></a><span class="lineno"> 748</span>  <span class="comment">// Compute the infered min/max of the target.</span></div><div class="line"><a name="l00749"></a><span class="lineno"> 749</span>  <span class="comment">// Update target domain (if it is not a complex expression).</span></div><div class="line"><a name="l00750"></a><span class="lineno"> 750</span>  <span class="keyword">const</span> LinearExpressionProto& target = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->lin_max().target();</div><div class="line"><a name="l00751"></a><span class="lineno"> 751</span>  {</div><div class="line"><a name="l00752"></a><span class="lineno"> 752</span>  int64_t infered_min = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(target);</div><div class="line"><a name="l00753"></a><span class="lineno"> 753</span>  int64_t infered_max = <a class="code" href="alldiff__cst_8cc.html#ad10edae0a852d72fb76afb1c77735045">std::numeric_limits<int64_t>::min</a>();</div><div class="line"><a name="l00754"></a><span class="lineno"> 754</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> LinearExpressionProto& expr : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->lin_max().exprs()) {</div><div class="line"><a name="l00755"></a><span class="lineno"> 755</span>  infered_min = <a class="code" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::max</a>(infered_min, context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(expr));</div><div class="line"><a name="l00756"></a><span class="lineno"> 756</span>  infered_max = <a class="code" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::max</a>(infered_max, context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a00f995618e00d575372ff823a12553a9">MaxOf</a>(expr));</div><div class="line"><a name="l00757"></a><span class="lineno"> 757</span>  }</div><div class="line"><a name="l00758"></a><span class="lineno"> 758</span> </div><div class="line"><a name="l00759"></a><span class="lineno"> 759</span>  <span class="keywordflow">if</span> (target.vars().empty()) {</div><div class="line"><a name="l00760"></a><span class="lineno"> 760</span>  <span class="keywordflow">if</span> (!Domain(infered_min, infered_max).Contains(target.offset())) {</div><div class="line"><a name="l00761"></a><span class="lineno"> 761</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"lin_max: infeasible"</span>);</div><div class="line"><a name="l00762"></a><span class="lineno"> 762</span>  <span class="keywordflow">return</span> MarkConstraintAsFalse(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l00763"></a><span class="lineno"> 763</span>  }</div><div class="line"><a name="l00764"></a><span class="lineno"> 764</span>  }</div><div class="line"><a name="l00765"></a><span class="lineno"> 765</span>  <span class="keywordflow">if</span> (!<a class="code" href="namespaceoperations__research_1_1sat.html#a42a3b266d8c6dfab1c14baa6c04e2333">HasEnforcementLiteral</a>(*<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) && target.vars().size() <= 1) { <span class="comment">// Affine</span></div><div class="line"><a name="l00766"></a><span class="lineno"> 766</span>  Domain rhs_domain;</div><div class="line"><a name="l00767"></a><span class="lineno"> 767</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> LinearExpressionProto& expr : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->lin_max().exprs()) {</div><div class="line"><a name="l00768"></a><span class="lineno"> 768</span>  rhs_domain = rhs_domain.UnionWith(</div><div class="line"><a name="l00769"></a><span class="lineno"> 769</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ae7450e5b3b9b22663ec7e1fe0d82b6b9">DomainSuperSetOf</a>(expr).<a class="code" href="classoperations__research_1_1_domain.html#a835826c4c5129b74553042a357a721ff">IntersectionWith</a>(</div><div class="line"><a name="l00770"></a><span class="lineno"> 770</span>  {infered_min, infered_max}));</div><div class="line"><a name="l00771"></a><span class="lineno"> 771</span>  }</div><div class="line"><a name="l00772"></a><span class="lineno"> 772</span>  <span class="keywordtype">bool</span> reduced = <span class="keyword">false</span>;</div><div class="line"><a name="l00773"></a><span class="lineno"> 773</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(target, rhs_domain, &reduced)) {</div><div class="line"><a name="l00774"></a><span class="lineno"> 774</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00775"></a><span class="lineno"> 775</span>  }</div><div class="line"><a name="l00776"></a><span class="lineno"> 776</span>  <span class="keywordflow">if</span> (reduced) {</div><div class="line"><a name="l00777"></a><span class="lineno"> 777</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"lin_max: target domain reduced"</span>);</div><div class="line"><a name="l00778"></a><span class="lineno"> 778</span>  }</div><div class="line"><a name="l00779"></a><span class="lineno"> 779</span>  }</div><div class="line"><a name="l00780"></a><span class="lineno"> 780</span>  }</div><div class="line"><a name="l00781"></a><span class="lineno"> 781</span> </div><div class="line"><a name="l00782"></a><span class="lineno"> 782</span>  <span class="comment">// Filter the expressions which are smaller than target_min.</span></div><div class="line"><a name="l00783"></a><span class="lineno"> 783</span>  <span class="keyword">const</span> int64_t target_min = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(target);</div><div class="line"><a name="l00784"></a><span class="lineno"> 784</span>  <span class="keyword">const</span> int64_t target_max = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a00f995618e00d575372ff823a12553a9">MaxOf</a>(target);</div><div class="line"><a name="l00785"></a><span class="lineno"> 785</span>  {</div><div class="line"><a name="l00786"></a><span class="lineno"> 786</span>  <span class="keywordtype">int</span> new_size = 0;</div><div class="line"><a name="l00787"></a><span class="lineno"> 787</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->lin_max().exprs_size(); ++i) {</div><div class="line"><a name="l00788"></a><span class="lineno"> 788</span>  <span class="keyword">const</span> LinearExpressionProto& expr = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->lin_max().exprs(i);</div><div class="line"><a name="l00789"></a><span class="lineno"> 789</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a00f995618e00d575372ff823a12553a9">MaxOf</a>(expr) < target_min) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l00790"></a><span class="lineno"> 790</span>  *<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_lin_max()->mutable_exprs(new_size) = expr;</div><div class="line"><a name="l00791"></a><span class="lineno"> 791</span>  new_size++;</div><div class="line"><a name="l00792"></a><span class="lineno"> 792</span>  }</div><div class="line"><a name="l00793"></a><span class="lineno"> 793</span>  <span class="keywordflow">if</span> (new_size < ct->lin_max().exprs_size()) {</div><div class="line"><a name="l00794"></a><span class="lineno"> 794</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"lin_max: removed exprs"</span>);</div><div class="line"><a name="l00795"></a><span class="lineno"> 795</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_lin_max()->mutable_exprs()->DeleteSubrange(</div><div class="line"><a name="l00796"></a><span class="lineno"> 796</span>  new_size, <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->lin_max().exprs_size() - new_size);</div><div class="line"><a name="l00797"></a><span class="lineno"> 797</span>  changed = <span class="keyword">true</span>;</div><div class="line"><a name="l00798"></a><span class="lineno"> 798</span>  }</div><div class="line"><a name="l00799"></a><span class="lineno"> 799</span>  }</div><div class="line"><a name="l00800"></a><span class="lineno"> 800</span> </div><div class="line"><a name="l00801"></a><span class="lineno"> 801</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->lin_max().exprs().empty()) {</div><div class="line"><a name="l00802"></a><span class="lineno"> 802</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"lin_max: no exprs"</span>);</div><div class="line"><a name="l00803"></a><span class="lineno"> 803</span>  <span class="keywordflow">return</span> MarkConstraintAsFalse(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l00804"></a><span class="lineno"> 804</span>  }</div><div class="line"><a name="l00805"></a><span class="lineno"> 805</span> </div><div class="line"><a name="l00806"></a><span class="lineno"> 806</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->lin_max().exprs().size() == 1) {</div><div class="line"><a name="l00807"></a><span class="lineno"> 807</span>  <span class="comment">// Convert to an equality. Note that we create a new constraint otherwise it</span></div><div class="line"><a name="l00808"></a><span class="lineno"> 808</span>  <span class="comment">// might not be processed again.</span></div><div class="line"><a name="l00809"></a><span class="lineno"> 809</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"lin_max: converted to equality"</span>);</div><div class="line"><a name="l00810"></a><span class="lineno"> 810</span>  ConstraintProto* new_ct = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>();</div><div class="line"><a name="l00811"></a><span class="lineno"> 811</span>  *new_ct = *<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>; <span class="comment">// copy name and potential reification.</span></div><div class="line"><a name="l00812"></a><span class="lineno"> 812</span>  <span class="keyword">auto</span>* arg = new_ct->mutable_linear();</div><div class="line"><a name="l00813"></a><span class="lineno"> 813</span>  <span class="keyword">const</span> LinearExpressionProto& <a class="code" href="constraint__solver_2table_8cc.html#acb18315d548212835cd8ed4287e6c0b6">a</a> = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->lin_max().target();</div><div class="line"><a name="l00814"></a><span class="lineno"> 814</span>  <span class="keyword">const</span> LinearExpressionProto& <a class="code" href="constraint__solver_2table_8cc.html#a9293e4d29cac928301645070dd307683">b</a> = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->lin_max().exprs(0);</div><div class="line"><a name="l00815"></a><span class="lineno"> 815</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < <a class="code" href="constraint__solver_2table_8cc.html#acb18315d548212835cd8ed4287e6c0b6">a</a>.vars().size(); ++i) {</div><div class="line"><a name="l00816"></a><span class="lineno"> 816</span>  arg->add_vars(<a class="code" href="constraint__solver_2table_8cc.html#acb18315d548212835cd8ed4287e6c0b6">a</a>.vars(i));</div><div class="line"><a name="l00817"></a><span class="lineno"> 817</span>  arg->add_coeffs(<a class="code" href="constraint__solver_2table_8cc.html#acb18315d548212835cd8ed4287e6c0b6">a</a>.coeffs(i));</div><div class="line"><a name="l00818"></a><span class="lineno"> 818</span>  }</div><div class="line"><a name="l00819"></a><span class="lineno"> 819</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < <a class="code" href="constraint__solver_2table_8cc.html#a9293e4d29cac928301645070dd307683">b</a>.vars().size(); ++i) {</div><div class="line"><a name="l00820"></a><span class="lineno"> 820</span>  arg->add_vars(<a class="code" href="constraint__solver_2table_8cc.html#a9293e4d29cac928301645070dd307683">b</a>.vars(i));</div><div class="line"><a name="l00821"></a><span class="lineno"> 821</span>  arg->add_coeffs(-<a class="code" href="constraint__solver_2table_8cc.html#a9293e4d29cac928301645070dd307683">b</a>.coeffs(i));</div><div class="line"><a name="l00822"></a><span class="lineno"> 822</span>  }</div><div class="line"><a name="l00823"></a><span class="lineno"> 823</span>  arg->add_domain(<a class="code" href="constraint__solver_2table_8cc.html#a9293e4d29cac928301645070dd307683">b</a>.offset() - <a class="code" href="constraint__solver_2table_8cc.html#acb18315d548212835cd8ed4287e6c0b6">a</a>.offset());</div><div class="line"><a name="l00824"></a><span class="lineno"> 824</span>  arg->add_domain(<a class="code" href="constraint__solver_2table_8cc.html#a9293e4d29cac928301645070dd307683">b</a>.offset() - <a class="code" href="constraint__solver_2table_8cc.html#acb18315d548212835cd8ed4287e6c0b6">a</a>.offset());</div><div class="line"><a name="l00825"></a><span class="lineno"> 825</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l00826"></a><span class="lineno"> 826</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l00827"></a><span class="lineno"> 827</span>  }</div><div class="line"><a name="l00828"></a><span class="lineno"> 828</span> </div><div class="line"><a name="l00829"></a><span class="lineno"> 829</span>  <span class="comment">// Cut everything above the max if possible.</span></div><div class="line"><a name="l00830"></a><span class="lineno"> 830</span>  <span class="comment">// If one of the linear expression has many term and is above the max, we</span></div><div class="line"><a name="l00831"></a><span class="lineno"> 831</span>  <span class="comment">// abort early since none of the other rule can be applied.</span></div><div class="line"><a name="l00832"></a><span class="lineno"> 832</span>  {</div><div class="line"><a name="l00833"></a><span class="lineno"> 833</span>  <span class="keywordtype">bool</span> abort = <span class="keyword">false</span>;</div><div class="line"><a name="l00834"></a><span class="lineno"> 834</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> LinearExpressionProto& expr : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->lin_max().exprs()) {</div><div class="line"><a name="l00835"></a><span class="lineno"> 835</span>  <span class="keyword">const</span> int64_t value_min = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(expr);</div><div class="line"><a name="l00836"></a><span class="lineno"> 836</span>  <span class="keywordtype">bool</span> modified = <span class="keyword">false</span>;</div><div class="line"><a name="l00837"></a><span class="lineno"> 837</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(expr, Domain(value_min, target_max),</div><div class="line"><a name="l00838"></a><span class="lineno"> 838</span>  &modified)) {</div><div class="line"><a name="l00839"></a><span class="lineno"> 839</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00840"></a><span class="lineno"> 840</span>  }</div><div class="line"><a name="l00841"></a><span class="lineno"> 841</span>  <span class="keywordflow">if</span> (modified) {</div><div class="line"><a name="l00842"></a><span class="lineno"> 842</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"lin_max: reduced expression domain."</span>);</div><div class="line"><a name="l00843"></a><span class="lineno"> 843</span>  }</div><div class="line"><a name="l00844"></a><span class="lineno"> 844</span>  <span class="keyword">const</span> int64_t value_max = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a00f995618e00d575372ff823a12553a9">MaxOf</a>(expr);</div><div class="line"><a name="l00845"></a><span class="lineno"> 845</span>  <span class="keywordflow">if</span> (value_max > target_max) {</div><div class="line"><a name="l00846"></a><span class="lineno"> 846</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"TODO lin_max: linear expression above max."</span>);</div><div class="line"><a name="l00847"></a><span class="lineno"> 847</span>  abort = <span class="keyword">true</span>;</div><div class="line"><a name="l00848"></a><span class="lineno"> 848</span>  }</div><div class="line"><a name="l00849"></a><span class="lineno"> 849</span>  }</div><div class="line"><a name="l00850"></a><span class="lineno"> 850</span>  <span class="keywordflow">if</span> (abort) <span class="keywordflow">return</span> changed;</div><div class="line"><a name="l00851"></a><span class="lineno"> 851</span>  }</div><div class="line"><a name="l00852"></a><span class="lineno"> 852</span> </div><div class="line"><a name="l00853"></a><span class="lineno"> 853</span>  <span class="comment">// Deal with fixed target case.</span></div><div class="line"><a name="l00854"></a><span class="lineno"> 854</span>  <span class="keywordflow">if</span> (target_min == target_max) {</div><div class="line"><a name="l00855"></a><span class="lineno"> 855</span>  <span class="keywordtype">bool</span> all_booleans = <span class="keyword">true</span>;</div><div class="line"><a name="l00856"></a><span class="lineno"> 856</span>  std::vector<int> literals;</div><div class="line"><a name="l00857"></a><span class="lineno"> 857</span>  <span class="keyword">const</span> int64_t fixed_target = target_min;</div><div class="line"><a name="l00858"></a><span class="lineno"> 858</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> LinearExpressionProto& expr : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->lin_max().exprs()) {</div><div class="line"><a name="l00859"></a><span class="lineno"> 859</span>  <span class="keyword">const</span> int64_t value_min = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(expr);</div><div class="line"><a name="l00860"></a><span class="lineno"> 860</span>  <span class="keyword">const</span> int64_t value_max = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a00f995618e00d575372ff823a12553a9">MaxOf</a>(expr);</div><div class="line"><a name="l00861"></a><span class="lineno"> 861</span>  <a class="code" href="base_2logging_8h.html#ae4db23f10f5d4aad6d735f5a74cd6f8c">CHECK_LE</a>(value_max, fixed_target) << <span class="stringliteral">"Presolved above"</span>;</div><div class="line"><a name="l00862"></a><span class="lineno"> 862</span>  <span class="keywordflow">if</span> (value_max < fixed_target) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l00863"></a><span class="lineno"> 863</span> </div><div class="line"><a name="l00864"></a><span class="lineno"> 864</span>  <span class="keywordflow">if</span> (value_min == value_max && value_max == fixed_target) {</div><div class="line"><a name="l00865"></a><span class="lineno"> 865</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"lin_max: always satisfied"</span>);</div><div class="line"><a name="l00866"></a><span class="lineno"> 866</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l00867"></a><span class="lineno"> 867</span>  }</div><div class="line"><a name="l00868"></a><span class="lineno"> 868</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#adff3b5f900c3d62132781fc25b54fb1a">ExpressionIsAffineBoolean</a>(expr)) {</div><div class="line"><a name="l00869"></a><span class="lineno"> 869</span>  <a class="code" href="base_2logging_8h.html#a7c0ce053b28d53aa4eaf3eb7fb71663b">CHECK_EQ</a>(value_max, fixed_target);</div><div class="line"><a name="l00870"></a><span class="lineno"> 870</span>  literals.push_back(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ad1cddf8749d0ce1686f1f428926cfb1d">LiteralForExpressionMax</a>(expr));</div><div class="line"><a name="l00871"></a><span class="lineno"> 871</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00872"></a><span class="lineno"> 872</span>  all_booleans = <span class="keyword">false</span>;</div><div class="line"><a name="l00873"></a><span class="lineno"> 873</span>  }</div><div class="line"><a name="l00874"></a><span class="lineno"> 874</span>  }</div><div class="line"><a name="l00875"></a><span class="lineno"> 875</span>  <span class="keywordflow">if</span> (all_booleans) {</div><div class="line"><a name="l00876"></a><span class="lineno"> 876</span>  <span class="keywordflow">if</span> (literals.empty()) {</div><div class="line"><a name="l00877"></a><span class="lineno"> 877</span>  <span class="keywordflow">return</span> MarkConstraintAsFalse(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l00878"></a><span class="lineno"> 878</span>  }</div><div class="line"><a name="l00879"></a><span class="lineno"> 879</span> </div><div class="line"><a name="l00880"></a><span class="lineno"> 880</span>  <span class="comment">// At least one true;</span></div><div class="line"><a name="l00881"></a><span class="lineno"> 881</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"lin_max: fixed target and all booleans"</span>);</div><div class="line"><a name="l00882"></a><span class="lineno"> 882</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> lit : literals) {</div><div class="line"><a name="l00883"></a><span class="lineno"> 883</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_bool_or()->add_literals(lit);</div><div class="line"><a name="l00884"></a><span class="lineno"> 884</span>  }</div><div class="line"><a name="l00885"></a><span class="lineno"> 885</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00886"></a><span class="lineno"> 886</span>  }</div><div class="line"><a name="l00887"></a><span class="lineno"> 887</span>  <span class="keywordflow">return</span> changed;</div><div class="line"><a name="l00888"></a><span class="lineno"> 888</span>  }</div><div class="line"><a name="l00889"></a><span class="lineno"> 889</span> </div><div class="line"><a name="l00890"></a><span class="lineno"> 890</span>  <span class="comment">// If everything is Boolean and affine, do not use a lin max!</span></div><div class="line"><a name="l00891"></a><span class="lineno"> 891</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#adff3b5f900c3d62132781fc25b54fb1a">ExpressionIsAffineBoolean</a>(target)) {</div><div class="line"><a name="l00892"></a><span class="lineno"> 892</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> target_ref = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ad1cddf8749d0ce1686f1f428926cfb1d">LiteralForExpressionMax</a>(target);</div><div class="line"><a name="l00893"></a><span class="lineno"> 893</span> </div><div class="line"><a name="l00894"></a><span class="lineno"> 894</span>  <span class="keywordtype">bool</span> abort = <span class="keyword">false</span>;</div><div class="line"><a name="l00895"></a><span class="lineno"> 895</span> </div><div class="line"><a name="l00896"></a><span class="lineno"> 896</span>  <span class="keywordtype">bool</span> min_is_reachable = <span class="keyword">false</span>;</div><div class="line"><a name="l00897"></a><span class="lineno"> 897</span>  std::vector<int> min_literals;</div><div class="line"><a name="l00898"></a><span class="lineno"> 898</span>  std::vector<int> literals_above_min;</div><div class="line"><a name="l00899"></a><span class="lineno"> 899</span>  std::vector<int> max_literals;</div><div class="line"><a name="l00900"></a><span class="lineno"> 900</span> </div><div class="line"><a name="l00901"></a><span class="lineno"> 901</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> LinearExpressionProto& expr : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->lin_max().exprs()) {</div><div class="line"><a name="l00902"></a><span class="lineno"> 902</span>  <span class="keyword">const</span> int64_t value_min = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(expr);</div><div class="line"><a name="l00903"></a><span class="lineno"> 903</span>  <span class="keyword">const</span> int64_t value_max = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a00f995618e00d575372ff823a12553a9">MaxOf</a>(expr);</div><div class="line"><a name="l00904"></a><span class="lineno"> 904</span> </div><div class="line"><a name="l00905"></a><span class="lineno"> 905</span>  <span class="comment">// This shouldn't happen, but it document the fact.</span></div><div class="line"><a name="l00906"></a><span class="lineno"> 906</span>  <span class="keywordflow">if</span> (value_min > target_min) {</div><div class="line"><a name="l00907"></a><span class="lineno"> 907</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"lin_max: fix target"</span>);</div><div class="line"><a name="l00908"></a><span class="lineno"> 908</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a37ed950834f3f3b427a707631fd745f4">SetLiteralToTrue</a>(target_ref)) <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00909"></a><span class="lineno"> 909</span>  abort = <span class="keyword">true</span>;</div><div class="line"><a name="l00910"></a><span class="lineno"> 910</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00911"></a><span class="lineno"> 911</span>  }</div><div class="line"><a name="l00912"></a><span class="lineno"> 912</span> </div><div class="line"><a name="l00913"></a><span class="lineno"> 913</span>  <span class="comment">// expr is fixed.</span></div><div class="line"><a name="l00914"></a><span class="lineno"> 914</span>  <span class="keywordflow">if</span> (value_min == value_max) {</div><div class="line"><a name="l00915"></a><span class="lineno"> 915</span>  <span class="keywordflow">if</span> (value_min == target_min) min_is_reachable = <span class="keyword">true</span>;</div><div class="line"><a name="l00916"></a><span class="lineno"> 916</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l00917"></a><span class="lineno"> 917</span>  }</div><div class="line"><a name="l00918"></a><span class="lineno"> 918</span> </div><div class="line"><a name="l00919"></a><span class="lineno"> 919</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#adff3b5f900c3d62132781fc25b54fb1a">ExpressionIsAffineBoolean</a>(expr)) {</div><div class="line"><a name="l00920"></a><span class="lineno"> 920</span>  abort = <span class="keyword">true</span>;</div><div class="line"><a name="l00921"></a><span class="lineno"> 921</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00922"></a><span class="lineno"> 922</span>  }</div><div class="line"><a name="l00923"></a><span class="lineno"> 923</span> </div><div class="line"><a name="l00924"></a><span class="lineno"> 924</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> ref = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ad1cddf8749d0ce1686f1f428926cfb1d">LiteralForExpressionMax</a>(expr);</div><div class="line"><a name="l00925"></a><span class="lineno"> 925</span>  <a class="code" href="base_2logging_8h.html#ae4db23f10f5d4aad6d735f5a74cd6f8c">CHECK_LE</a>(value_min, target_min);</div><div class="line"><a name="l00926"></a><span class="lineno"> 926</span>  <span class="keywordflow">if</span> (value_min == target_min) {</div><div class="line"><a name="l00927"></a><span class="lineno"> 927</span>  min_literals.push_back(<a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(ref));</div><div class="line"><a name="l00928"></a><span class="lineno"> 928</span>  }</div><div class="line"><a name="l00929"></a><span class="lineno"> 929</span> </div><div class="line"><a name="l00930"></a><span class="lineno"> 930</span>  <a class="code" href="base_2logging_8h.html#ae4db23f10f5d4aad6d735f5a74cd6f8c">CHECK_LE</a>(value_max, target_max);</div><div class="line"><a name="l00931"></a><span class="lineno"> 931</span>  <span class="keywordflow">if</span> (value_max == target_max) {</div><div class="line"><a name="l00932"></a><span class="lineno"> 932</span>  max_literals.push_back(ref);</div><div class="line"><a name="l00933"></a><span class="lineno"> 933</span>  literals_above_min.push_back(ref);</div><div class="line"><a name="l00934"></a><span class="lineno"> 934</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (value_max > target_min) {</div><div class="line"><a name="l00935"></a><span class="lineno"> 935</span>  literals_above_min.push_back(ref);</div><div class="line"><a name="l00936"></a><span class="lineno"> 936</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (value_max == target_min) {</div><div class="line"><a name="l00937"></a><span class="lineno"> 937</span>  min_literals.push_back(ref);</div><div class="line"><a name="l00938"></a><span class="lineno"> 938</span>  }</div><div class="line"><a name="l00939"></a><span class="lineno"> 939</span>  }</div><div class="line"><a name="l00940"></a><span class="lineno"> 940</span>  <span class="keywordflow">if</span> (!abort) {</div><div class="line"><a name="l00941"></a><span class="lineno"> 941</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"lin_max: all Booleans."</span>);</div><div class="line"><a name="l00942"></a><span class="lineno"> 942</span> </div><div class="line"><a name="l00943"></a><span class="lineno"> 943</span>  <span class="comment">// target_ref => at_least_one(max_literals);</span></div><div class="line"><a name="l00944"></a><span class="lineno"> 944</span>  ConstraintProto* clause = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>();</div><div class="line"><a name="l00945"></a><span class="lineno"> 945</span>  clause-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#acfab2074ffdcaf9686057126c5e29d38">add_enforcement_literal</a>(target_ref);</div><div class="line"><a name="l00946"></a><span class="lineno"> 946</span>  clause->mutable_bool_or();</div><div class="line"><a name="l00947"></a><span class="lineno"> 947</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> lit : max_literals) {</div><div class="line"><a name="l00948"></a><span class="lineno"> 948</span>  clause->mutable_bool_or()->add_literals(lit);</div><div class="line"><a name="l00949"></a><span class="lineno"> 949</span>  }</div><div class="line"><a name="l00950"></a><span class="lineno"> 950</span> </div><div class="line"><a name="l00951"></a><span class="lineno"> 951</span>  <span class="comment">// not(target_ref) => not(lit) for lit in literals_above_min</span></div><div class="line"><a name="l00952"></a><span class="lineno"> 952</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> lit : literals_above_min) {</div><div class="line"><a name="l00953"></a><span class="lineno"> 953</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1aadaad9b8af16ab5a208c682e2e1717">AddImplication</a>(lit, target_ref);</div><div class="line"><a name="l00954"></a><span class="lineno"> 954</span>  }</div><div class="line"><a name="l00955"></a><span class="lineno"> 955</span> </div><div class="line"><a name="l00956"></a><span class="lineno"> 956</span>  <span class="keywordflow">if</span> (!min_is_reachable) {</div><div class="line"><a name="l00957"></a><span class="lineno"> 957</span>  <span class="comment">// not(target_ref) => at_least_one(min_literals).</span></div><div class="line"><a name="l00958"></a><span class="lineno"> 958</span>  ConstraintProto* clause = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>();</div><div class="line"><a name="l00959"></a><span class="lineno"> 959</span>  clause-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#acfab2074ffdcaf9686057126c5e29d38">add_enforcement_literal</a>(<a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(target_ref));</div><div class="line"><a name="l00960"></a><span class="lineno"> 960</span>  clause->mutable_bool_or();</div><div class="line"><a name="l00961"></a><span class="lineno"> 961</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> lit : min_literals) {</div><div class="line"><a name="l00962"></a><span class="lineno"> 962</span>  clause->mutable_bool_or()->add_literals(lit);</div><div class="line"><a name="l00963"></a><span class="lineno"> 963</span>  }</div><div class="line"><a name="l00964"></a><span class="lineno"> 964</span>  }</div><div class="line"><a name="l00965"></a><span class="lineno"> 965</span> </div><div class="line"><a name="l00966"></a><span class="lineno"> 966</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l00967"></a><span class="lineno"> 967</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l00968"></a><span class="lineno"> 968</span>  }</div><div class="line"><a name="l00969"></a><span class="lineno"> 969</span>  }</div><div class="line"><a name="l00970"></a><span class="lineno"> 970</span> </div><div class="line"><a name="l00971"></a><span class="lineno"> 971</span>  <span class="keywordflow">return</span> changed;</div><div class="line"><a name="l00972"></a><span class="lineno"> 972</span> }</div><div class="line"><a name="l00973"></a><span class="lineno"> 973</span> </div><div class="line"><a name="l00974"></a><span class="lineno"> 974</span> <span class="keywordtype">bool</span> CpModelPresolver::PresolveIntAbs(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l00975"></a><span class="lineno"> 975</span>  <a class="code" href="base_2logging_8h.html#a7c0ce053b28d53aa4eaf3eb7fb71663b">CHECK_EQ</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->enforcement_literal_size(), 0);</div><div class="line"><a name="l00976"></a><span class="lineno"> 976</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00977"></a><span class="lineno"> 977</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> target_ref = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_max().target();</div><div class="line"><a name="l00978"></a><span class="lineno"> 978</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = <a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_max().vars(0));</div><div class="line"><a name="l00979"></a><span class="lineno"> 979</span> </div><div class="line"><a name="l00980"></a><span class="lineno"> 980</span>  <span class="comment">// Propagate from the variable domain to the target variable.</span></div><div class="line"><a name="l00981"></a><span class="lineno"> 981</span>  <span class="keyword">const</span> Domain var_domain = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l00982"></a><span class="lineno"> 982</span>  <span class="keyword">const</span> Domain new_target_domain =</div><div class="line"><a name="l00983"></a><span class="lineno"> 983</span>  var_domain.<a class="code" href="classoperations__research_1_1_domain.html#a5919f86aede74172b7fea05ebdb58975">UnionWith</a>(var_domain.Negation())</div><div class="line"><a name="l00984"></a><span class="lineno"> 984</span>  .IntersectionWith({0, <a class="code" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::numeric_limits<int64_t>::max</a>()});</div><div class="line"><a name="l00985"></a><span class="lineno"> 985</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(target_ref).<a class="code" href="classoperations__research_1_1_domain.html#a1f922def1b57974333f228818cd04e68">IsIncludedIn</a>(new_target_domain)) {</div><div class="line"><a name="l00986"></a><span class="lineno"> 986</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(target_ref, new_target_domain)) {</div><div class="line"><a name="l00987"></a><span class="lineno"> 987</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00988"></a><span class="lineno"> 988</span>  }</div><div class="line"><a name="l00989"></a><span class="lineno"> 989</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"int_abs: propagate domain x to abs(x)"</span>);</div><div class="line"><a name="l00990"></a><span class="lineno"> 990</span>  }</div><div class="line"><a name="l00991"></a><span class="lineno"> 991</span> </div><div class="line"><a name="l00992"></a><span class="lineno"> 992</span>  <span class="comment">// Propagate from target domain to variable.</span></div><div class="line"><a name="l00993"></a><span class="lineno"> 993</span>  <span class="keyword">const</span> Domain target_domain = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(target_ref);</div><div class="line"><a name="l00994"></a><span class="lineno"> 994</span>  <span class="keyword">const</span> Domain new_var_domain =</div><div class="line"><a name="l00995"></a><span class="lineno"> 995</span>  target_domain.<a class="code" href="classoperations__research_1_1_domain.html#a5919f86aede74172b7fea05ebdb58975">UnionWith</a>(target_domain.Negation());</div><div class="line"><a name="l00996"></a><span class="lineno"> 996</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>).<a class="code" href="classoperations__research_1_1_domain.html#a1f922def1b57974333f228818cd04e68">IsIncludedIn</a>(new_var_domain)) {</div><div class="line"><a name="l00997"></a><span class="lineno"> 997</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>, new_var_domain)) {</div><div class="line"><a name="l00998"></a><span class="lineno"> 998</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00999"></a><span class="lineno"> 999</span>  }</div><div class="line"><a name="l01000"></a><span class="lineno"> 1000</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"int_abs: propagate domain abs(x) to x"</span>);</div><div class="line"><a name="l01001"></a><span class="lineno"> 1001</span>  }</div><div class="line"><a name="l01002"></a><span class="lineno"> 1002</span> </div><div class="line"><a name="l01003"></a><span class="lineno"> 1003</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) >= 0 && !context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#abb6eb29f56c3a33b8ae1b74b08b755c2">IsFixed</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) {</div><div class="line"><a name="l01004"></a><span class="lineno"> 1004</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"int_abs: converted to equality"</span>);</div><div class="line"><a name="l01005"></a><span class="lineno"> 1005</span>  ConstraintProto* new_ct = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>();</div><div class="line"><a name="l01006"></a><span class="lineno"> 1006</span>  new_ct-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a74f7eb449a6e182b73c8b4a1dbf15ce6">set_name</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->name());</div><div class="line"><a name="l01007"></a><span class="lineno"> 1007</span>  <span class="keyword">auto</span>* arg = new_ct->mutable_linear();</div><div class="line"><a name="l01008"></a><span class="lineno"> 1008</span>  arg->add_vars(target_ref);</div><div class="line"><a name="l01009"></a><span class="lineno"> 1009</span>  arg->add_coeffs(1);</div><div class="line"><a name="l01010"></a><span class="lineno"> 1010</span>  arg->add_vars(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l01011"></a><span class="lineno"> 1011</span>  arg->add_coeffs(-1);</div><div class="line"><a name="l01012"></a><span class="lineno"> 1012</span>  arg->add_domain(0);</div><div class="line"><a name="l01013"></a><span class="lineno"> 1013</span>  arg->add_domain(0);</div><div class="line"><a name="l01014"></a><span class="lineno"> 1014</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l01015"></a><span class="lineno"> 1015</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l01016"></a><span class="lineno"> 1016</span>  }</div><div class="line"><a name="l01017"></a><span class="lineno"> 1017</span> </div><div class="line"><a name="l01018"></a><span class="lineno"> 1018</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a00f995618e00d575372ff823a12553a9">MaxOf</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) <= 0 && !context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#abb6eb29f56c3a33b8ae1b74b08b755c2">IsFixed</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) {</div><div class="line"><a name="l01019"></a><span class="lineno"> 1019</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"int_abs: converted to equality"</span>);</div><div class="line"><a name="l01020"></a><span class="lineno"> 1020</span>  ConstraintProto* new_ct = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>();</div><div class="line"><a name="l01021"></a><span class="lineno"> 1021</span>  new_ct-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a74f7eb449a6e182b73c8b4a1dbf15ce6">set_name</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->name());</div><div class="line"><a name="l01022"></a><span class="lineno"> 1022</span>  <span class="keyword">auto</span>* arg = new_ct->mutable_linear();</div><div class="line"><a name="l01023"></a><span class="lineno"> 1023</span>  arg->add_vars(target_ref);</div><div class="line"><a name="l01024"></a><span class="lineno"> 1024</span>  arg->add_coeffs(1);</div><div class="line"><a name="l01025"></a><span class="lineno"> 1025</span>  arg->add_vars(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l01026"></a><span class="lineno"> 1026</span>  arg->add_coeffs(1);</div><div class="line"><a name="l01027"></a><span class="lineno"> 1027</span>  arg->add_domain(0);</div><div class="line"><a name="l01028"></a><span class="lineno"> 1028</span>  arg->add_domain(0);</div><div class="line"><a name="l01029"></a><span class="lineno"> 1029</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l01030"></a><span class="lineno"> 1030</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l01031"></a><span class="lineno"> 1031</span>  }</div><div class="line"><a name="l01032"></a><span class="lineno"> 1032</span> </div><div class="line"><a name="l01033"></a><span class="lineno"> 1033</span>  <span class="comment">// Remove the abs constraint if the target is removable or fixed, as domains</span></div><div class="line"><a name="l01034"></a><span class="lineno"> 1034</span>  <span class="comment">// have been propagated.</span></div><div class="line"><a name="l01035"></a><span class="lineno"> 1035</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a54cf7f0077717d59a828b656b60c1615">VariableIsUniqueAndRemovable</a>(target_ref) ||</div><div class="line"><a name="l01036"></a><span class="lineno"> 1036</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#abb6eb29f56c3a33b8ae1b74b08b755c2">IsFixed</a>(target_ref)) {</div><div class="line"><a name="l01037"></a><span class="lineno"> 1037</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#abb6eb29f56c3a33b8ae1b74b08b755c2">IsFixed</a>(target_ref)) {</div><div class="line"><a name="l01038"></a><span class="lineno"> 1038</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a6939dc7b9db01cf3deff10405e260461">MarkVariableAsRemoved</a>(target_ref);</div><div class="line"><a name="l01039"></a><span class="lineno"> 1039</span>  *context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a4b3b9ef9c5f214dd4427daa2646eceda">mapping_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>() = *<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>;</div><div class="line"><a name="l01040"></a><span class="lineno"> 1040</span>  }</div><div class="line"><a name="l01041"></a><span class="lineno"> 1041</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"int_abs: remove constraint"</span>);</div><div class="line"><a name="l01042"></a><span class="lineno"> 1042</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l01043"></a><span class="lineno"> 1043</span>  }</div><div class="line"><a name="l01044"></a><span class="lineno"> 1044</span> </div><div class="line"><a name="l01045"></a><span class="lineno"> 1045</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a06f0856b91c0399720273b5da85ce280">StoreAbsRelation</a>(target_ref, <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) {</div><div class="line"><a name="l01046"></a><span class="lineno"> 1046</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"int_abs: store abs(x) == y"</span>);</div><div class="line"><a name="l01047"></a><span class="lineno"> 1047</span>  }</div><div class="line"><a name="l01048"></a><span class="lineno"> 1048</span> </div><div class="line"><a name="l01049"></a><span class="lineno"> 1049</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01050"></a><span class="lineno"> 1050</span> }</div><div class="line"><a name="l01051"></a><span class="lineno"> 1051</span> </div><div class="line"><a name="l01052"></a><span class="lineno"> 1052</span> <span class="keywordtype">bool</span> CpModelPresolver::PresolveIntMin(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l01053"></a><span class="lineno"> 1053</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01054"></a><span class="lineno"> 1054</span> </div><div class="line"><a name="l01055"></a><span class="lineno"> 1055</span>  <span class="keyword">const</span> <span class="keyword">auto</span> copy = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_min();</div><div class="line"><a name="l01056"></a><span class="lineno"> 1056</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_int_max()->set_target(<a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(copy.target()));</div><div class="line"><a name="l01057"></a><span class="lineno"> 1057</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> ref : copy.vars()) {</div><div class="line"><a name="l01058"></a><span class="lineno"> 1058</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_int_max()->add_vars(<a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(ref));</div><div class="line"><a name="l01059"></a><span class="lineno"> 1059</span>  }</div><div class="line"><a name="l01060"></a><span class="lineno"> 1060</span>  <span class="keywordflow">return</span> PresolveIntMax(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l01061"></a><span class="lineno"> 1061</span> }</div><div class="line"><a name="l01062"></a><span class="lineno"> 1062</span> </div><div class="line"><a name="l01063"></a><span class="lineno"> 1063</span> <span class="keywordtype">bool</span> CpModelPresolver::PresolveIntProd(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l01064"></a><span class="lineno"> 1064</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01065"></a><span class="lineno"> 1065</span>  <span class="keywordflow">if</span> (<a class="code" href="namespaceoperations__research_1_1sat.html#a42a3b266d8c6dfab1c14baa6c04e2333">HasEnforcementLiteral</a>(*<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01066"></a><span class="lineno"> 1066</span> </div><div class="line"><a name="l01067"></a><span class="lineno"> 1067</span>  <span class="comment">// Remove constant variables.</span></div><div class="line"><a name="l01068"></a><span class="lineno"> 1068</span>  <span class="comment">// Replace any affine relation without offset.</span></div><div class="line"><a name="l01069"></a><span class="lineno"> 1069</span>  int64_t constant_factor = 1;</div><div class="line"><a name="l01070"></a><span class="lineno"> 1070</span>  <span class="keywordtype">int</span> new_size = 0;</div><div class="line"><a name="l01071"></a><span class="lineno"> 1071</span>  <span class="keywordtype">bool</span> changed = <span class="keyword">false</span>;</div><div class="line"><a name="l01072"></a><span class="lineno"> 1072</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_prod().vars().size(); ++i) {</div><div class="line"><a name="l01073"></a><span class="lineno"> 1073</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> ref = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_prod().vars(i);</div><div class="line"><a name="l01074"></a><span class="lineno"> 1074</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#abb6eb29f56c3a33b8ae1b74b08b755c2">IsFixed</a>(ref)) {</div><div class="line"><a name="l01075"></a><span class="lineno"> 1075</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"int_prod: removed constant variable."</span>);</div><div class="line"><a name="l01076"></a><span class="lineno"> 1076</span>  changed = <span class="keyword">true</span>;</div><div class="line"><a name="l01077"></a><span class="lineno"> 1077</span>  constant_factor = <a class="code" href="namespaceoperations__research.html#aa64bf49d041052c7cb3f40f7496d7534">CapProd</a>(constant_factor, context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(ref));</div><div class="line"><a name="l01078"></a><span class="lineno"> 1078</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l01079"></a><span class="lineno"> 1079</span>  }</div><div class="line"><a name="l01080"></a><span class="lineno"> 1080</span>  <span class="keyword">const</span> AffineRelation::Relation& r = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aaddc5f58e8a40a5a308531949153f814">GetAffineRelation</a>(ref);</div><div class="line"><a name="l01081"></a><span class="lineno"> 1081</span>  <span class="keywordflow">if</span> (r.representative != ref && r.offset == 0) {</div><div class="line"><a name="l01082"></a><span class="lineno"> 1082</span>  changed = <span class="keyword">true</span>;</div><div class="line"><a name="l01083"></a><span class="lineno"> 1083</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_int_prod()->set_vars(new_size++, r.representative);</div><div class="line"><a name="l01084"></a><span class="lineno"> 1084</span>  constant_factor = <a class="code" href="namespaceoperations__research.html#aa64bf49d041052c7cb3f40f7496d7534">CapProd</a>(constant_factor, r.coeff);</div><div class="line"><a name="l01085"></a><span class="lineno"> 1085</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l01086"></a><span class="lineno"> 1086</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_int_prod()->set_vars(new_size++, ref);</div><div class="line"><a name="l01087"></a><span class="lineno"> 1087</span>  }</div><div class="line"><a name="l01088"></a><span class="lineno"> 1088</span>  }</div><div class="line"><a name="l01089"></a><span class="lineno"> 1089</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_int_prod()->mutable_vars()->Truncate(new_size);</div><div class="line"><a name="l01090"></a><span class="lineno"> 1090</span> </div><div class="line"><a name="l01091"></a><span class="lineno"> 1091</span>  <span class="keywordflow">if</span> (constant_factor == 0) {</div><div class="line"><a name="l01092"></a><span class="lineno"> 1092</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"int_prod: multiplication by zero"</span>);</div><div class="line"><a name="l01093"></a><span class="lineno"> 1093</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_prod().target(), Domain(0))) {</div><div class="line"><a name="l01094"></a><span class="lineno"> 1094</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01095"></a><span class="lineno"> 1095</span>  }</div><div class="line"><a name="l01096"></a><span class="lineno"> 1096</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l01097"></a><span class="lineno"> 1097</span>  }</div><div class="line"><a name="l01098"></a><span class="lineno"> 1098</span> </div><div class="line"><a name="l01099"></a><span class="lineno"> 1099</span>  <span class="comment">// In this case, the only possible value that fit in the domains is zero.</span></div><div class="line"><a name="l01100"></a><span class="lineno"> 1100</span>  <span class="comment">// We will check for UNSAT if zero is not achievable by the rhs below.</span></div><div class="line"><a name="l01101"></a><span class="lineno"> 1101</span>  <span class="keywordflow">if</span> (constant_factor == <a class="code" href="alldiff__cst_8cc.html#ad10edae0a852d72fb76afb1c77735045">std::numeric_limits<int64_t>::min</a>() ||</div><div class="line"><a name="l01102"></a><span class="lineno"> 1102</span>  constant_factor == <a class="code" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::numeric_limits<int64_t>::max</a>()) {</div><div class="line"><a name="l01103"></a><span class="lineno"> 1103</span>  constant_factor = 1;</div><div class="line"><a name="l01104"></a><span class="lineno"> 1104</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"int_prod: overflow if non zero"</span>);</div><div class="line"><a name="l01105"></a><span class="lineno"> 1105</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_prod().target(), Domain(0))) {</div><div class="line"><a name="l01106"></a><span class="lineno"> 1106</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01107"></a><span class="lineno"> 1107</span>  }</div><div class="line"><a name="l01108"></a><span class="lineno"> 1108</span>  }</div><div class="line"><a name="l01109"></a><span class="lineno"> 1109</span> </div><div class="line"><a name="l01110"></a><span class="lineno"> 1110</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_prod().vars().empty()) {</div><div class="line"><a name="l01111"></a><span class="lineno"> 1111</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_prod().target(),</div><div class="line"><a name="l01112"></a><span class="lineno"> 1112</span>  Domain(constant_factor))) {</div><div class="line"><a name="l01113"></a><span class="lineno"> 1113</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01114"></a><span class="lineno"> 1114</span>  }</div><div class="line"><a name="l01115"></a><span class="lineno"> 1115</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"int_prod: constant product"</span>);</div><div class="line"><a name="l01116"></a><span class="lineno"> 1116</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l01117"></a><span class="lineno"> 1117</span>  }</div><div class="line"><a name="l01118"></a><span class="lineno"> 1118</span> </div><div class="line"><a name="l01119"></a><span class="lineno"> 1119</span>  <span class="comment">// Replace by linear!</span></div><div class="line"><a name="l01120"></a><span class="lineno"> 1120</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_prod().vars().size() == 1) {</div><div class="line"><a name="l01121"></a><span class="lineno"> 1121</span>  ConstraintProto* <span class="keyword">const</span> lin = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>();</div><div class="line"><a name="l01122"></a><span class="lineno"> 1122</span>  lin-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ad653c55b371ae98444295965c6622ddb">mutable_linear</a>()-><a class="code" href="classoperations__research_1_1sat_1_1_linear_constraint_proto.html#aecb2bc94116e771000e5be7f8e3a7f6c">add_vars</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_prod().target());</div><div class="line"><a name="l01123"></a><span class="lineno"> 1123</span>  lin->mutable_linear()->add_coeffs(1);</div><div class="line"><a name="l01124"></a><span class="lineno"> 1124</span>  lin->mutable_linear()->add_vars(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_prod().vars(0));</div><div class="line"><a name="l01125"></a><span class="lineno"> 1125</span>  lin->mutable_linear()->add_coeffs(-constant_factor);</div><div class="line"><a name="l01126"></a><span class="lineno"> 1126</span>  lin->mutable_linear()->add_domain(0);</div><div class="line"><a name="l01127"></a><span class="lineno"> 1127</span>  lin->mutable_linear()->add_domain(0);</div><div class="line"><a name="l01128"></a><span class="lineno"> 1128</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l01129"></a><span class="lineno"> 1129</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"int_prod: linearize product by constant."</span>);</div><div class="line"><a name="l01130"></a><span class="lineno"> 1130</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l01131"></a><span class="lineno"> 1131</span>  }</div><div class="line"><a name="l01132"></a><span class="lineno"> 1132</span> </div><div class="line"><a name="l01133"></a><span class="lineno"> 1133</span>  <span class="comment">// TODO(user): Probably better to add a fixed variable to the product</span></div><div class="line"><a name="l01134"></a><span class="lineno"> 1134</span>  <span class="comment">// instead in this case. But we do need to support product with more than</span></div><div class="line"><a name="l01135"></a><span class="lineno"> 1135</span>  <span class="comment">// two variables properly for that.</span></div><div class="line"><a name="l01136"></a><span class="lineno"> 1136</span>  <span class="comment">//</span></div><div class="line"><a name="l01137"></a><span class="lineno"> 1137</span>  <span class="comment">// TODO(user): We might do that too early since the other presolve step below</span></div><div class="line"><a name="l01138"></a><span class="lineno"> 1138</span>  <span class="comment">// might simplify the constraint in such a way that there is no need to create</span></div><div class="line"><a name="l01139"></a><span class="lineno"> 1139</span>  <span class="comment">// a new variable!</span></div><div class="line"><a name="l01140"></a><span class="lineno"> 1140</span>  <span class="keywordflow">if</span> (constant_factor != 1) {</div><div class="line"><a name="l01141"></a><span class="lineno"> 1141</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"int_prod: extracted product by constant."</span>);</div><div class="line"><a name="l01142"></a><span class="lineno"> 1142</span> </div><div class="line"><a name="l01143"></a><span class="lineno"> 1143</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> old_target = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_prod().target();</div><div class="line"><a name="l01144"></a><span class="lineno"> 1144</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> new_target = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#abef5f55c3278c137faca92b8e433f8ea">variables_size</a>();</div><div class="line"><a name="l01145"></a><span class="lineno"> 1145</span> </div><div class="line"><a name="l01146"></a><span class="lineno"> 1146</span>  IntegerVariableProto* var_proto = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ad03d1e2f94c4ca4c8004ac5355e6504a">add_variables</a>();</div><div class="line"><a name="l01147"></a><span class="lineno"> 1147</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a901c19b12842f8af153e588a689a90b5">FillDomainInProto</a>(</div><div class="line"><a name="l01148"></a><span class="lineno"> 1148</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(old_target).<a class="code" href="classoperations__research_1_1_domain.html#a1341b29865c5167a64de30c797672e4c">InverseMultiplicationBy</a>(constant_factor),</div><div class="line"><a name="l01149"></a><span class="lineno"> 1149</span>  var_proto);</div><div class="line"><a name="l01150"></a><span class="lineno"> 1150</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a62cd771660767621e917b2c256182c4e">InitializeNewDomains</a>();</div><div class="line"><a name="l01151"></a><span class="lineno"> 1151</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01152"></a><span class="lineno"> 1152</span> </div><div class="line"><a name="l01153"></a><span class="lineno"> 1153</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_int_prod()->set_target(new_target);</div><div class="line"><a name="l01154"></a><span class="lineno"> 1154</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#abb6eb29f56c3a33b8ae1b74b08b755c2">IsFixed</a>(new_target)) {</div><div class="line"><a name="l01155"></a><span class="lineno"> 1155</span>  <span class="comment">// We need to fix old_target too.</span></div><div class="line"><a name="l01156"></a><span class="lineno"> 1156</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(</div><div class="line"><a name="l01157"></a><span class="lineno"> 1157</span>  old_target, context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(new_target)</div><div class="line"><a name="l01158"></a><span class="lineno"> 1158</span>  .<a class="code" href="classoperations__research_1_1_domain.html#a63a708c626b59b4504ddb879496c894e">MultiplicationBy</a>(constant_factor))) {</div><div class="line"><a name="l01159"></a><span class="lineno"> 1159</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01160"></a><span class="lineno"> 1160</span>  }</div><div class="line"><a name="l01161"></a><span class="lineno"> 1161</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l01162"></a><span class="lineno"> 1162</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a3999a4ff1f53b54b40c8cd396105572a">StoreAffineRelation</a>(old_target, new_target,</div><div class="line"><a name="l01163"></a><span class="lineno"> 1163</span>  constant_factor, 0)) {</div><div class="line"><a name="l01164"></a><span class="lineno"> 1164</span>  <span class="comment">// We cannot store the affine relation because the old target seems</span></div><div class="line"><a name="l01165"></a><span class="lineno"> 1165</span>  <span class="comment">// to already be in affine relation with another variable. This is rare</span></div><div class="line"><a name="l01166"></a><span class="lineno"> 1166</span>  <span class="comment">// and we need to add a new constraint in that case.</span></div><div class="line"><a name="l01167"></a><span class="lineno"> 1167</span>  ConstraintProto* new_ct = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>();</div><div class="line"><a name="l01168"></a><span class="lineno"> 1168</span>  LinearConstraintProto* lin = new_ct-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ad653c55b371ae98444295965c6622ddb">mutable_linear</a>();</div><div class="line"><a name="l01169"></a><span class="lineno"> 1169</span>  lin-><a class="code" href="classoperations__research_1_1sat_1_1_linear_constraint_proto.html#aecb2bc94116e771000e5be7f8e3a7f6c">add_vars</a>(old_target);</div><div class="line"><a name="l01170"></a><span class="lineno"> 1170</span>  lin->add_coeffs(1);</div><div class="line"><a name="l01171"></a><span class="lineno"> 1171</span>  lin->add_vars(new_target);</div><div class="line"><a name="l01172"></a><span class="lineno"> 1172</span>  lin->add_coeffs(-constant_factor);</div><div class="line"><a name="l01173"></a><span class="lineno"> 1173</span>  lin->add_domain(0);</div><div class="line"><a name="l01174"></a><span class="lineno"> 1174</span>  lin->add_domain(0);</div><div class="line"><a name="l01175"></a><span class="lineno"> 1175</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l01176"></a><span class="lineno"> 1176</span>  }</div><div class="line"><a name="l01177"></a><span class="lineno"> 1177</span>  }</div><div class="line"><a name="l01178"></a><span class="lineno"> 1178</span>  }</div><div class="line"><a name="l01179"></a><span class="lineno"> 1179</span> </div><div class="line"><a name="l01180"></a><span class="lineno"> 1180</span>  <span class="comment">// Restrict the target domain if possible.</span></div><div class="line"><a name="l01181"></a><span class="lineno"> 1181</span>  Domain implied(1);</div><div class="line"><a name="l01182"></a><span class="lineno"> 1182</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> ref : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_prod().vars()) {</div><div class="line"><a name="l01183"></a><span class="lineno"> 1183</span>  implied = implied.ContinuousMultiplicationBy(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(ref));</div><div class="line"><a name="l01184"></a><span class="lineno"> 1184</span>  }</div><div class="line"><a name="l01185"></a><span class="lineno"> 1185</span>  <span class="keywordtype">bool</span> modified = <span class="keyword">false</span>;</div><div class="line"><a name="l01186"></a><span class="lineno"> 1186</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_prod().target(), implied,</div><div class="line"><a name="l01187"></a><span class="lineno"> 1187</span>  &modified)) {</div><div class="line"><a name="l01188"></a><span class="lineno"> 1188</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01189"></a><span class="lineno"> 1189</span>  }</div><div class="line"><a name="l01190"></a><span class="lineno"> 1190</span>  <span class="keywordflow">if</span> (modified) {</div><div class="line"><a name="l01191"></a><span class="lineno"> 1191</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"int_prod: reduced target domain."</span>);</div><div class="line"><a name="l01192"></a><span class="lineno"> 1192</span>  }</div><div class="line"><a name="l01193"></a><span class="lineno"> 1193</span> </div><div class="line"><a name="l01194"></a><span class="lineno"> 1194</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_prod().vars_size() == 2) {</div><div class="line"><a name="l01195"></a><span class="lineno"> 1195</span>  <span class="keywordtype">int</span> <a class="code" href="constraint__solver_2table_8cc.html#acb18315d548212835cd8ed4287e6c0b6">a</a> = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_prod().vars(0);</div><div class="line"><a name="l01196"></a><span class="lineno"> 1196</span>  <span class="keywordtype">int</span> <a class="code" href="constraint__solver_2table_8cc.html#a9293e4d29cac928301645070dd307683">b</a> = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_prod().vars(1);</div><div class="line"><a name="l01197"></a><span class="lineno"> 1197</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> product = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_prod().target();</div><div class="line"><a name="l01198"></a><span class="lineno"> 1198</span>  <span class="keywordflow">if</span> (<a class="code" href="constraint__solver_2table_8cc.html#acb18315d548212835cd8ed4287e6c0b6">a</a> == <a class="code" href="constraint__solver_2table_8cc.html#a9293e4d29cac928301645070dd307683">b</a> && <a class="code" href="constraint__solver_2table_8cc.html#acb18315d548212835cd8ed4287e6c0b6">a</a> == product) { <span class="comment">// x = x * x, only true for {0, 1}.</span></div><div class="line"><a name="l01199"></a><span class="lineno"> 1199</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(product, Domain(0, 1))) {</div><div class="line"><a name="l01200"></a><span class="lineno"> 1200</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01201"></a><span class="lineno"> 1201</span>  }</div><div class="line"><a name="l01202"></a><span class="lineno"> 1202</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"int_prod: fix variable to zero or one."</span>);</div><div class="line"><a name="l01203"></a><span class="lineno"> 1203</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l01204"></a><span class="lineno"> 1204</span>  }</div><div class="line"><a name="l01205"></a><span class="lineno"> 1205</span>  }</div><div class="line"><a name="l01206"></a><span class="lineno"> 1206</span> </div><div class="line"><a name="l01207"></a><span class="lineno"> 1207</span>  <span class="comment">// For now, we only presolve the case where all variables are Booleans.</span></div><div class="line"><a name="l01208"></a><span class="lineno"> 1208</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> target_ref = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_prod().target();</div><div class="line"><a name="l01209"></a><span class="lineno"> 1209</span>  <span class="keywordflow">if</span> (!<a class="code" href="namespaceoperations__research_1_1sat.html#a217338425de4389014563f1f24331713">RefIsPositive</a>(target_ref)) <span class="keywordflow">return</span> changed;</div><div class="line"><a name="l01210"></a><span class="lineno"> 1210</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_prod().vars()) {</div><div class="line"><a name="l01211"></a><span class="lineno"> 1211</span>  <span class="keywordflow">if</span> (!<a class="code" href="namespaceoperations__research_1_1sat.html#a217338425de4389014563f1f24331713">RefIsPositive</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) <span class="keywordflow">return</span> changed;</div><div class="line"><a name="l01212"></a><span class="lineno"> 1212</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) < 0) <span class="keywordflow">return</span> changed;</div><div class="line"><a name="l01213"></a><span class="lineno"> 1213</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a00f995618e00d575372ff823a12553a9">MaxOf</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) > 1) <span class="keywordflow">return</span> changed;</div><div class="line"><a name="l01214"></a><span class="lineno"> 1214</span>  }</div><div class="line"><a name="l01215"></a><span class="lineno"> 1215</span> </div><div class="line"><a name="l01216"></a><span class="lineno"> 1216</span>  <span class="comment">// This is a bool constraint!</span></div><div class="line"><a name="l01217"></a><span class="lineno"> 1217</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(target_ref, Domain(0, 1))) {</div><div class="line"><a name="l01218"></a><span class="lineno"> 1218</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01219"></a><span class="lineno"> 1219</span>  }</div><div class="line"><a name="l01220"></a><span class="lineno"> 1220</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"int_prod: all Boolean."</span>);</div><div class="line"><a name="l01221"></a><span class="lineno"> 1221</span>  {</div><div class="line"><a name="l01222"></a><span class="lineno"> 1222</span>  ConstraintProto* new_ct = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>();</div><div class="line"><a name="l01223"></a><span class="lineno"> 1223</span>  new_ct-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#acfab2074ffdcaf9686057126c5e29d38">add_enforcement_literal</a>(target_ref);</div><div class="line"><a name="l01224"></a><span class="lineno"> 1224</span>  <span class="keyword">auto</span>* arg = new_ct->mutable_bool_and();</div><div class="line"><a name="l01225"></a><span class="lineno"> 1225</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_prod().vars()) {</div><div class="line"><a name="l01226"></a><span class="lineno"> 1226</span>  arg->add_literals(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l01227"></a><span class="lineno"> 1227</span>  }</div><div class="line"><a name="l01228"></a><span class="lineno"> 1228</span>  }</div><div class="line"><a name="l01229"></a><span class="lineno"> 1229</span>  {</div><div class="line"><a name="l01230"></a><span class="lineno"> 1230</span>  ConstraintProto* new_ct = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>();</div><div class="line"><a name="l01231"></a><span class="lineno"> 1231</span>  <span class="keyword">auto</span>* arg = new_ct-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ae26e2a099b411b50dd1d4c6605837d0a">mutable_bool_or</a>();</div><div class="line"><a name="l01232"></a><span class="lineno"> 1232</span>  arg-><a class="code" href="classoperations__research_1_1sat_1_1_bool_argument_proto.html#a9abd20cd5c98c0a4535d168a1c7bb18e">add_literals</a>(target_ref);</div><div class="line"><a name="l01233"></a><span class="lineno"> 1233</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_prod().vars()) {</div><div class="line"><a name="l01234"></a><span class="lineno"> 1234</span>  arg->add_literals(<a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>));</div><div class="line"><a name="l01235"></a><span class="lineno"> 1235</span>  }</div><div class="line"><a name="l01236"></a><span class="lineno"> 1236</span>  }</div><div class="line"><a name="l01237"></a><span class="lineno"> 1237</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l01238"></a><span class="lineno"> 1238</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l01239"></a><span class="lineno"> 1239</span> }</div><div class="line"><a name="l01240"></a><span class="lineno"> 1240</span> </div><div class="line"><a name="l01241"></a><span class="lineno"> 1241</span> <span class="keywordtype">bool</span> CpModelPresolver::PresolveIntDiv(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l01242"></a><span class="lineno"> 1242</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01243"></a><span class="lineno"> 1243</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> target = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_div().target();</div><div class="line"><a name="l01244"></a><span class="lineno"> 1244</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> ref_x = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_div().vars(0);</div><div class="line"><a name="l01245"></a><span class="lineno"> 1245</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> ref_div = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_div().vars(1);</div><div class="line"><a name="l01246"></a><span class="lineno"> 1246</span> </div><div class="line"><a name="l01247"></a><span class="lineno"> 1247</span>  <span class="comment">// For now, we only presolve the case where the divisor is constant.</span></div><div class="line"><a name="l01248"></a><span class="lineno"> 1248</span>  <span class="keywordflow">if</span> (!<a class="code" href="namespaceoperations__research_1_1sat.html#a217338425de4389014563f1f24331713">RefIsPositive</a>(target) || !<a class="code" href="namespaceoperations__research_1_1sat.html#a217338425de4389014563f1f24331713">RefIsPositive</a>(ref_x) ||</div><div class="line"><a name="l01249"></a><span class="lineno"> 1249</span>  !<a class="code" href="namespaceoperations__research_1_1sat.html#a217338425de4389014563f1f24331713">RefIsPositive</a>(ref_div) || context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a77e37831a01ff737a7b5bd7e12c2ecf7">DomainIsEmpty</a>(ref_div) ||</div><div class="line"><a name="l01250"></a><span class="lineno"> 1250</span>  !context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#abb6eb29f56c3a33b8ae1b74b08b755c2">IsFixed</a>(ref_div)) {</div><div class="line"><a name="l01251"></a><span class="lineno"> 1251</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01252"></a><span class="lineno"> 1252</span>  }</div><div class="line"><a name="l01253"></a><span class="lineno"> 1253</span> </div><div class="line"><a name="l01254"></a><span class="lineno"> 1254</span>  <span class="keyword">const</span> int64_t divisor = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(ref_div);</div><div class="line"><a name="l01255"></a><span class="lineno"> 1255</span>  <span class="keywordflow">if</span> (divisor == 1) {</div><div class="line"><a name="l01256"></a><span class="lineno"> 1256</span>  LinearConstraintProto* <span class="keyword">const</span> lin =</div><div class="line"><a name="l01257"></a><span class="lineno"> 1257</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>()-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ad653c55b371ae98444295965c6622ddb">mutable_linear</a>();</div><div class="line"><a name="l01258"></a><span class="lineno"> 1258</span>  lin-><a class="code" href="classoperations__research_1_1sat_1_1_linear_constraint_proto.html#aecb2bc94116e771000e5be7f8e3a7f6c">add_vars</a>(ref_x);</div><div class="line"><a name="l01259"></a><span class="lineno"> 1259</span>  lin->add_coeffs(1);</div><div class="line"><a name="l01260"></a><span class="lineno"> 1260</span>  lin->add_vars(target);</div><div class="line"><a name="l01261"></a><span class="lineno"> 1261</span>  lin->add_coeffs(-1);</div><div class="line"><a name="l01262"></a><span class="lineno"> 1262</span>  lin->add_domain(0);</div><div class="line"><a name="l01263"></a><span class="lineno"> 1263</span>  lin->add_domain(0);</div><div class="line"><a name="l01264"></a><span class="lineno"> 1264</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l01265"></a><span class="lineno"> 1265</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"int_div: rewrite to equality"</span>);</div><div class="line"><a name="l01266"></a><span class="lineno"> 1266</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l01267"></a><span class="lineno"> 1267</span>  }</div><div class="line"><a name="l01268"></a><span class="lineno"> 1268</span>  <span class="keywordtype">bool</span> domain_modified = <span class="keyword">false</span>;</div><div class="line"><a name="l01269"></a><span class="lineno"> 1269</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(</div><div class="line"><a name="l01270"></a><span class="lineno"> 1270</span>  target, context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(ref_x).<a class="code" href="classoperations__research_1_1_domain.html#acecac80bcaa379f4d37af5a0f0b48d02">DivisionBy</a>(divisor),</div><div class="line"><a name="l01271"></a><span class="lineno"> 1271</span>  &domain_modified)) {</div><div class="line"><a name="l01272"></a><span class="lineno"> 1272</span>  <span class="keywordflow">if</span> (domain_modified) {</div><div class="line"><a name="l01273"></a><span class="lineno"> 1273</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(</div><div class="line"><a name="l01274"></a><span class="lineno"> 1274</span>  <span class="stringliteral">"int_div: updated domain of target in target = X / cte"</span>);</div><div class="line"><a name="l01275"></a><span class="lineno"> 1275</span>  }</div><div class="line"><a name="l01276"></a><span class="lineno"> 1276</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l01277"></a><span class="lineno"> 1277</span>  <span class="comment">// Model is unsat.</span></div><div class="line"><a name="l01278"></a><span class="lineno"> 1278</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01279"></a><span class="lineno"> 1279</span>  }</div><div class="line"><a name="l01280"></a><span class="lineno"> 1280</span> </div><div class="line"><a name="l01281"></a><span class="lineno"> 1281</span>  <span class="comment">// Linearize if everything is positive.</span></div><div class="line"><a name="l01282"></a><span class="lineno"> 1282</span>  <span class="comment">// TODO(user): Deal with other cases where there is no change of</span></div><div class="line"><a name="l01283"></a><span class="lineno"> 1283</span>  <span class="comment">// sign.We can also deal with target = cte, div variable.</span></div><div class="line"><a name="l01284"></a><span class="lineno"> 1284</span> </div><div class="line"><a name="l01285"></a><span class="lineno"> 1285</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(target) >= 0 && context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(ref_x) >= 0 &&</div><div class="line"><a name="l01286"></a><span class="lineno"> 1286</span>  divisor > 1) {</div><div class="line"><a name="l01287"></a><span class="lineno"> 1287</span>  LinearConstraintProto* <span class="keyword">const</span> lin =</div><div class="line"><a name="l01288"></a><span class="lineno"> 1288</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>()-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ad653c55b371ae98444295965c6622ddb">mutable_linear</a>();</div><div class="line"><a name="l01289"></a><span class="lineno"> 1289</span>  lin-><a class="code" href="classoperations__research_1_1sat_1_1_linear_constraint_proto.html#aecb2bc94116e771000e5be7f8e3a7f6c">add_vars</a>(ref_x);</div><div class="line"><a name="l01290"></a><span class="lineno"> 1290</span>  lin->add_coeffs(1);</div><div class="line"><a name="l01291"></a><span class="lineno"> 1291</span>  lin->add_vars(target);</div><div class="line"><a name="l01292"></a><span class="lineno"> 1292</span>  lin->add_coeffs(-divisor);</div><div class="line"><a name="l01293"></a><span class="lineno"> 1293</span>  lin->add_domain(0);</div><div class="line"><a name="l01294"></a><span class="lineno"> 1294</span>  lin->add_domain(divisor - 1);</div><div class="line"><a name="l01295"></a><span class="lineno"> 1295</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l01296"></a><span class="lineno"> 1296</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(</div><div class="line"><a name="l01297"></a><span class="lineno"> 1297</span>  <span class="stringliteral">"int_div: linearize positive division with a constant divisor"</span>);</div><div class="line"><a name="l01298"></a><span class="lineno"> 1298</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l01299"></a><span class="lineno"> 1299</span>  }</div><div class="line"><a name="l01300"></a><span class="lineno"> 1300</span> </div><div class="line"><a name="l01301"></a><span class="lineno"> 1301</span>  <span class="comment">// TODO(user): reduce the domain of X by introducing an</span></div><div class="line"><a name="l01302"></a><span class="lineno"> 1302</span>  <span class="comment">// InverseDivisionOfSortedDisjointIntervals().</span></div><div class="line"><a name="l01303"></a><span class="lineno"> 1303</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01304"></a><span class="lineno"> 1304</span> }</div><div class="line"><a name="l01305"></a><span class="lineno"> 1305</span> </div><div class="line"><a name="l01306"></a><span class="lineno"> 1306</span> <span class="keywordtype">bool</span> CpModelPresolver::PresolveIntMod(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l01307"></a><span class="lineno"> 1307</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01308"></a><span class="lineno"> 1308</span> </div><div class="line"><a name="l01309"></a><span class="lineno"> 1309</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> target = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_mod().target();</div><div class="line"><a name="l01310"></a><span class="lineno"> 1310</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> ref_mod = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_mod().vars(1);</div><div class="line"><a name="l01311"></a><span class="lineno"> 1311</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> ref_x = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_mod().vars(0);</div><div class="line"><a name="l01312"></a><span class="lineno"> 1312</span> </div><div class="line"><a name="l01313"></a><span class="lineno"> 1313</span>  <span class="keywordtype">bool</span> changed = <span class="keyword">false</span>;</div><div class="line"><a name="l01314"></a><span class="lineno"> 1314</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(</div><div class="line"><a name="l01315"></a><span class="lineno"> 1315</span>  target,</div><div class="line"><a name="l01316"></a><span class="lineno"> 1316</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(ref_x).<a class="code" href="classoperations__research_1_1_domain.html#ae4bddf829edf1817ecffe94dcc2c6260">PositiveModuloBySuperset</a>(</div><div class="line"><a name="l01317"></a><span class="lineno"> 1317</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(ref_mod)),</div><div class="line"><a name="l01318"></a><span class="lineno"> 1318</span>  &changed)) {</div><div class="line"><a name="l01319"></a><span class="lineno"> 1319</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01320"></a><span class="lineno"> 1320</span>  }</div><div class="line"><a name="l01321"></a><span class="lineno"> 1321</span> </div><div class="line"><a name="l01322"></a><span class="lineno"> 1322</span>  <span class="keywordflow">if</span> (changed) {</div><div class="line"><a name="l01323"></a><span class="lineno"> 1323</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"int_mod: reduce target domain"</span>);</div><div class="line"><a name="l01324"></a><span class="lineno"> 1324</span>  }</div><div class="line"><a name="l01325"></a><span class="lineno"> 1325</span> </div><div class="line"><a name="l01326"></a><span class="lineno"> 1326</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01327"></a><span class="lineno"> 1327</span> }</div><div class="line"><a name="l01328"></a><span class="lineno"> 1328</span> </div><div class="line"><a name="l01329"></a><span class="lineno"> 1329</span> <span class="keywordtype">bool</span> CpModelPresolver::ExploitEquivalenceRelations(<span class="keywordtype">int</span> c, ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l01330"></a><span class="lineno"> 1330</span>  <span class="keywordtype">bool</span> changed = <span class="keyword">false</span>;</div><div class="line"><a name="l01331"></a><span class="lineno"> 1331</span> </div><div class="line"><a name="l01332"></a><span class="lineno"> 1332</span>  <span class="comment">// Optim: Special case for the linear constraint. We just remap the</span></div><div class="line"><a name="l01333"></a><span class="lineno"> 1333</span>  <span class="comment">// enforcement literals, the normal variables will be replaced by their</span></div><div class="line"><a name="l01334"></a><span class="lineno"> 1334</span>  <span class="comment">// representative in CanonicalizeLinear().</span></div><div class="line"><a name="l01335"></a><span class="lineno"> 1335</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->constraint_case() == ConstraintProto::ConstraintCase::kLinear) {</div><div class="line"><a name="l01336"></a><span class="lineno"> 1336</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span>& ref : *<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_enforcement_literal()) {</div><div class="line"><a name="l01337"></a><span class="lineno"> 1337</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> rep = this->context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a37770bda4577c8ad121d77d99a63cb0f">GetLiteralRepresentative</a>(ref);</div><div class="line"><a name="l01338"></a><span class="lineno"> 1338</span>  <span class="keywordflow">if</span> (rep != ref) {</div><div class="line"><a name="l01339"></a><span class="lineno"> 1339</span>  changed = <span class="keyword">true</span>;</div><div class="line"><a name="l01340"></a><span class="lineno"> 1340</span>  ref = rep;</div><div class="line"><a name="l01341"></a><span class="lineno"> 1341</span>  }</div><div class="line"><a name="l01342"></a><span class="lineno"> 1342</span>  }</div><div class="line"><a name="l01343"></a><span class="lineno"> 1343</span>  <span class="keywordflow">return</span> changed;</div><div class="line"><a name="l01344"></a><span class="lineno"> 1344</span>  }</div><div class="line"><a name="l01345"></a><span class="lineno"> 1345</span> </div><div class="line"><a name="l01346"></a><span class="lineno"> 1346</span>  <span class="comment">// Optim: This extra loop is a lot faster than reparsing the variable from the</span></div><div class="line"><a name="l01347"></a><span class="lineno"> 1347</span>  <span class="comment">// proto when there is nothing to do, which is quite often.</span></div><div class="line"><a name="l01348"></a><span class="lineno"> 1348</span>  <span class="keywordtype">bool</span> work_to_do = <span class="keyword">false</span>;</div><div class="line"><a name="l01349"></a><span class="lineno"> 1349</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> : context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a4d724b2f4bd1d1cab7b11dafd3448d8b">ConstraintToVars</a>(c)) {</div><div class="line"><a name="l01350"></a><span class="lineno"> 1350</span>  <span class="keyword">const</span> AffineRelation::Relation r = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aaddc5f58e8a40a5a308531949153f814">GetAffineRelation</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l01351"></a><span class="lineno"> 1351</span>  <span class="keywordflow">if</span> (r.representative != <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) {</div><div class="line"><a name="l01352"></a><span class="lineno"> 1352</span>  work_to_do = <span class="keyword">true</span>;</div><div class="line"><a name="l01353"></a><span class="lineno"> 1353</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l01354"></a><span class="lineno"> 1354</span>  }</div><div class="line"><a name="l01355"></a><span class="lineno"> 1355</span>  }</div><div class="line"><a name="l01356"></a><span class="lineno"> 1356</span>  <span class="keywordflow">if</span> (!work_to_do) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01357"></a><span class="lineno"> 1357</span> </div><div class="line"><a name="l01358"></a><span class="lineno"> 1358</span>  <span class="comment">// Remap equal and negated variables to their representative.</span></div><div class="line"><a name="l01359"></a><span class="lineno"> 1359</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#ab5f94367fbf4ab2c03bd6bef412c41f7">ApplyToAllVariableIndices</a>(</div><div class="line"><a name="l01360"></a><span class="lineno"> 1360</span>  [&changed, <span class="keyword">this</span>](<span class="keywordtype">int</span>* ref) {</div><div class="line"><a name="l01361"></a><span class="lineno"> 1361</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> rep = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a6387e91b098c081f059892e1346a29ed">GetVariableRepresentative</a>(*ref);</div><div class="line"><a name="l01362"></a><span class="lineno"> 1362</span>  <span class="keywordflow">if</span> (rep != *ref) {</div><div class="line"><a name="l01363"></a><span class="lineno"> 1363</span>  changed = <span class="keyword">true</span>;</div><div class="line"><a name="l01364"></a><span class="lineno"> 1364</span>  *ref = rep;</div><div class="line"><a name="l01365"></a><span class="lineno"> 1365</span>  }</div><div class="line"><a name="l01366"></a><span class="lineno"> 1366</span>  },</div><div class="line"><a name="l01367"></a><span class="lineno"> 1367</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l01368"></a><span class="lineno"> 1368</span> </div><div class="line"><a name="l01369"></a><span class="lineno"> 1369</span>  <span class="comment">// Remap literal and negated literal to their representative.</span></div><div class="line"><a name="l01370"></a><span class="lineno"> 1370</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a6d4dc38d28f20c0c1bbbe71fff0803e7">ApplyToAllLiteralIndices</a>(</div><div class="line"><a name="l01371"></a><span class="lineno"> 1371</span>  [&changed, <span class="keyword">this</span>](<span class="keywordtype">int</span>* ref) {</div><div class="line"><a name="l01372"></a><span class="lineno"> 1372</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> rep = this->context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a37770bda4577c8ad121d77d99a63cb0f">GetLiteralRepresentative</a>(*ref);</div><div class="line"><a name="l01373"></a><span class="lineno"> 1373</span>  <span class="keywordflow">if</span> (rep != *ref) {</div><div class="line"><a name="l01374"></a><span class="lineno"> 1374</span>  changed = <span class="keyword">true</span>;</div><div class="line"><a name="l01375"></a><span class="lineno"> 1375</span>  *ref = rep;</div><div class="line"><a name="l01376"></a><span class="lineno"> 1376</span>  }</div><div class="line"><a name="l01377"></a><span class="lineno"> 1377</span>  },</div><div class="line"><a name="l01378"></a><span class="lineno"> 1378</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l01379"></a><span class="lineno"> 1379</span>  <span class="keywordflow">return</span> changed;</div><div class="line"><a name="l01380"></a><span class="lineno"> 1380</span> }</div><div class="line"><a name="l01381"></a><span class="lineno"> 1381</span> </div><div class="line"><a name="l01382"></a><span class="lineno"> 1382</span> <span class="keywordtype">void</span> CpModelPresolver::DivideLinearByGcd(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l01383"></a><span class="lineno"> 1383</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span>;</div><div class="line"><a name="l01384"></a><span class="lineno"> 1384</span> </div><div class="line"><a name="l01385"></a><span class="lineno"> 1385</span>  <span class="comment">// Compute the GCD of all coefficients.</span></div><div class="line"><a name="l01386"></a><span class="lineno"> 1386</span>  int64_t gcd = 0;</div><div class="line"><a name="l01387"></a><span class="lineno"> 1387</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> num_vars = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().vars().size();</div><div class="line"><a name="l01388"></a><span class="lineno"> 1388</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num_vars; ++i) {</div><div class="line"><a name="l01389"></a><span class="lineno"> 1389</span>  <span class="keyword">const</span> int64_t magnitude = std::abs(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().coeffs(i));</div><div class="line"><a name="l01390"></a><span class="lineno"> 1390</span>  gcd = <a class="code" href="classoperations__research_1_1_math_util.html#ae94db7b2fa1d8e1b3c1dc6c683191609">MathUtil::GCD64</a>(gcd, magnitude);</div><div class="line"><a name="l01391"></a><span class="lineno"> 1391</span>  <span class="keywordflow">if</span> (gcd == 1) <span class="keywordflow">break</span>;</div><div class="line"><a name="l01392"></a><span class="lineno"> 1392</span>  }</div><div class="line"><a name="l01393"></a><span class="lineno"> 1393</span>  <span class="keywordflow">if</span> (gcd > 1) {</div><div class="line"><a name="l01394"></a><span class="lineno"> 1394</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"linear: divide by GCD"</span>);</div><div class="line"><a name="l01395"></a><span class="lineno"> 1395</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num_vars; ++i) {</div><div class="line"><a name="l01396"></a><span class="lineno"> 1396</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_linear()->set_coeffs(i, <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().coeffs(i) / gcd);</div><div class="line"><a name="l01397"></a><span class="lineno"> 1397</span>  }</div><div class="line"><a name="l01398"></a><span class="lineno"> 1398</span>  <span class="keyword">const</span> Domain rhs = <a class="code" href="namespaceoperations__research_1_1sat.html#ab1240060466ba48a36a4b36379bce26a">ReadDomainFromProto</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear());</div><div class="line"><a name="l01399"></a><span class="lineno"> 1399</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a901c19b12842f8af153e588a689a90b5">FillDomainInProto</a>(rhs.InverseMultiplicationBy(gcd), <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_linear());</div><div class="line"><a name="l01400"></a><span class="lineno"> 1400</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().domain_size() == 0) {</div><div class="line"><a name="l01401"></a><span class="lineno"> 1401</span>  <span class="keywordflow">return</span> (<span class="keywordtype">void</span>)MarkConstraintAsFalse(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l01402"></a><span class="lineno"> 1402</span>  }</div><div class="line"><a name="l01403"></a><span class="lineno"> 1403</span>  }</div><div class="line"><a name="l01404"></a><span class="lineno"> 1404</span> }</div><div class="line"><a name="l01405"></a><span class="lineno"> 1405</span> </div><div class="line"><a name="l01406"></a><span class="lineno"> 1406</span> <span class="keywordtype">void</span> CpModelPresolver::PresolveLinearEqualityModuloTwo(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l01407"></a><span class="lineno"> 1407</span>  <span class="keywordflow">if</span> (!<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->enforcement_literal().empty()) <span class="keywordflow">return</span>;</div><div class="line"><a name="l01408"></a><span class="lineno"> 1408</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().domain().size() != 2) <span class="keywordflow">return</span>;</div><div class="line"><a name="l01409"></a><span class="lineno"> 1409</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().domain(0) != <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().domain(1)) <span class="keywordflow">return</span>;</div><div class="line"><a name="l01410"></a><span class="lineno"> 1410</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span>;</div><div class="line"><a name="l01411"></a><span class="lineno"> 1411</span> </div><div class="line"><a name="l01412"></a><span class="lineno"> 1412</span>  <span class="comment">// Any equality must be true modulo n.</span></div><div class="line"><a name="l01413"></a><span class="lineno"> 1413</span>  <span class="comment">// The case modulo 2 is interesting if the non-zero terms are Booleans.</span></div><div class="line"><a name="l01414"></a><span class="lineno"> 1414</span>  std::vector<int> literals;</div><div class="line"><a name="l01415"></a><span class="lineno"> 1415</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().vars().size(); ++i) {</div><div class="line"><a name="l01416"></a><span class="lineno"> 1416</span>  <span class="keyword">const</span> int64_t coeff = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().coeffs(i);</div><div class="line"><a name="l01417"></a><span class="lineno"> 1417</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> ref = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().vars(i);</div><div class="line"><a name="l01418"></a><span class="lineno"> 1418</span>  <span class="keywordflow">if</span> (coeff % 2 == 0) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l01419"></a><span class="lineno"> 1419</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af188bac2776d4545aab9405f5c801cd8">CanBeUsedAsLiteral</a>(ref)) <span class="keywordflow">return</span>;</div><div class="line"><a name="l01420"></a><span class="lineno"> 1420</span>  literals.push_back(<a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(ref));</div><div class="line"><a name="l01421"></a><span class="lineno"> 1421</span>  <span class="keywordflow">if</span> (literals.size() > 2) <span class="keywordflow">return</span>;</div><div class="line"><a name="l01422"></a><span class="lineno"> 1422</span>  }</div><div class="line"><a name="l01423"></a><span class="lineno"> 1423</span>  <span class="keywordflow">if</span> (literals.size() == 1) {</div><div class="line"><a name="l01424"></a><span class="lineno"> 1424</span>  <span class="keyword">const</span> int64_t rhs = std::abs(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().domain(0));</div><div class="line"><a name="l01425"></a><span class="lineno"> 1425</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"linear: only one odd Boolean in equality"</span>);</div><div class="line"><a name="l01426"></a><span class="lineno"> 1426</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(literals[0], Domain(rhs % 2))) <span class="keywordflow">return</span>;</div><div class="line"><a name="l01427"></a><span class="lineno"> 1427</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (literals.size() == 2) {</div><div class="line"><a name="l01428"></a><span class="lineno"> 1428</span>  <span class="keyword">const</span> int64_t rhs = std::abs(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().domain(0));</div><div class="line"><a name="l01429"></a><span class="lineno"> 1429</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"linear: only two odd Booleans in equality"</span>);</div><div class="line"><a name="l01430"></a><span class="lineno"> 1430</span>  <span class="keywordflow">if</span> (rhs % 2) {</div><div class="line"><a name="l01431"></a><span class="lineno"> 1431</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a8fc1d49d1e1bf7261f15ccc6c23c4b10">StoreBooleanEqualityRelation</a>(literals[0],</div><div class="line"><a name="l01432"></a><span class="lineno"> 1432</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(literals[1]));</div><div class="line"><a name="l01433"></a><span class="lineno"> 1433</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l01434"></a><span class="lineno"> 1434</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a8fc1d49d1e1bf7261f15ccc6c23c4b10">StoreBooleanEqualityRelation</a>(literals[0], literals[1]);</div><div class="line"><a name="l01435"></a><span class="lineno"> 1435</span>  }</div><div class="line"><a name="l01436"></a><span class="lineno"> 1436</span>  }</div><div class="line"><a name="l01437"></a><span class="lineno"> 1437</span> }</div><div class="line"><a name="l01438"></a><span class="lineno"> 1438</span> </div><div class="line"><a name="l01439"></a><span class="lineno"> 1439</span> <span class="keyword">template</span> <<span class="keyword">typename</span> ProtoWithVarsAndCoeffs></div><div class="line"><a name="l01440"></a><span class="lineno"> 1440</span> <span class="keywordtype">bool</span> CpModelPresolver::CanonicalizeLinearExpressionInternal(</div><div class="line"><a name="l01441"></a><span class="lineno"> 1441</span>  <span class="keyword">const</span> ConstraintProto& <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>, ProtoWithVarsAndCoeffs* <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>, int64_t* offset) {</div><div class="line"><a name="l01442"></a><span class="lineno"> 1442</span>  <span class="comment">// First regroup the terms on the same variables and sum the fixed ones.</span></div><div class="line"><a name="l01443"></a><span class="lineno"> 1443</span>  <span class="comment">//</span></div><div class="line"><a name="l01444"></a><span class="lineno"> 1444</span>  <span class="comment">// TODO(user): Add a quick pass to skip most of the work below if the</span></div><div class="line"><a name="l01445"></a><span class="lineno"> 1445</span>  <span class="comment">// constraint is already in canonical form?</span></div><div class="line"><a name="l01446"></a><span class="lineno"> 1446</span>  tmp_terms_.clear();</div><div class="line"><a name="l01447"></a><span class="lineno"> 1447</span>  int64_t sum_of_fixed_terms = 0;</div><div class="line"><a name="l01448"></a><span class="lineno"> 1448</span>  <span class="keywordtype">bool</span> remapped = <span class="keyword">false</span>;</div><div class="line"><a name="l01449"></a><span class="lineno"> 1449</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> old_size = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->vars().size();</div><div class="line"><a name="l01450"></a><span class="lineno"> 1450</span>  <a class="code" href="base_2logging_8h.html#ae89df3243bbb8341130c7b3f44145ea0">DCHECK_EQ</a>(old_size, <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->coeffs().size());</div><div class="line"><a name="l01451"></a><span class="lineno"> 1451</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < old_size; ++i) {</div><div class="line"><a name="l01452"></a><span class="lineno"> 1452</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> ref = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->vars(i);</div><div class="line"><a name="l01453"></a><span class="lineno"> 1453</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = <a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(ref);</div><div class="line"><a name="l01454"></a><span class="lineno"> 1454</span>  <span class="keyword">const</span> int64_t coeff =</div><div class="line"><a name="l01455"></a><span class="lineno"> 1455</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a217338425de4389014563f1f24331713">RefIsPositive</a>(ref) ? <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->coeffs(i) : -<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->coeffs(i);</div><div class="line"><a name="l01456"></a><span class="lineno"> 1456</span>  <span class="keywordflow">if</span> (coeff == 0) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l01457"></a><span class="lineno"> 1457</span> </div><div class="line"><a name="l01458"></a><span class="lineno"> 1458</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#abb6eb29f56c3a33b8ae1b74b08b755c2">IsFixed</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) {</div><div class="line"><a name="l01459"></a><span class="lineno"> 1459</span>  sum_of_fixed_terms += coeff * context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l01460"></a><span class="lineno"> 1460</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l01461"></a><span class="lineno"> 1461</span>  }</div><div class="line"><a name="l01462"></a><span class="lineno"> 1462</span> </div><div class="line"><a name="l01463"></a><span class="lineno"> 1463</span>  <span class="comment">// TODO(user): Avoid the quadratic loop for the corner case of many</span></div><div class="line"><a name="l01464"></a><span class="lineno"> 1464</span>  <span class="comment">// enforcement literal (this should be pretty rare though).</span></div><div class="line"><a name="l01465"></a><span class="lineno"> 1465</span>  <span class="keywordtype">bool</span> removed = <span class="keyword">false</span>;</div><div class="line"><a name="l01466"></a><span class="lineno"> 1466</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> enf : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.enforcement_literal()) {</div><div class="line"><a name="l01467"></a><span class="lineno"> 1467</span>  <span class="keywordflow">if</span> (<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> == <a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(enf)) {</div><div class="line"><a name="l01468"></a><span class="lineno"> 1468</span>  <span class="keywordflow">if</span> (<a class="code" href="namespaceoperations__research_1_1sat.html#a217338425de4389014563f1f24331713">RefIsPositive</a>(enf)) {</div><div class="line"><a name="l01469"></a><span class="lineno"> 1469</span>  <span class="comment">// If the constraint is enforced, we can assume the variable is at 1.</span></div><div class="line"><a name="l01470"></a><span class="lineno"> 1470</span>  sum_of_fixed_terms += coeff;</div><div class="line"><a name="l01471"></a><span class="lineno"> 1471</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l01472"></a><span class="lineno"> 1472</span>  <span class="comment">// We can assume the variable is at zero.</span></div><div class="line"><a name="l01473"></a><span class="lineno"> 1473</span>  }</div><div class="line"><a name="l01474"></a><span class="lineno"> 1474</span>  removed = <span class="keyword">true</span>;</div><div class="line"><a name="l01475"></a><span class="lineno"> 1475</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l01476"></a><span class="lineno"> 1476</span>  }</div><div class="line"><a name="l01477"></a><span class="lineno"> 1477</span>  }</div><div class="line"><a name="l01478"></a><span class="lineno"> 1478</span>  <span class="keywordflow">if</span> (removed) {</div><div class="line"><a name="l01479"></a><span class="lineno"> 1479</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"linear: enforcement literal in expression"</span>);</div><div class="line"><a name="l01480"></a><span class="lineno"> 1480</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l01481"></a><span class="lineno"> 1481</span>  }</div><div class="line"><a name="l01482"></a><span class="lineno"> 1482</span> </div><div class="line"><a name="l01483"></a><span class="lineno"> 1483</span>  <span class="keyword">const</span> AffineRelation::Relation r = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aaddc5f58e8a40a5a308531949153f814">GetAffineRelation</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l01484"></a><span class="lineno"> 1484</span>  <span class="keywordflow">if</span> (r.representative != <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) {</div><div class="line"><a name="l01485"></a><span class="lineno"> 1485</span>  remapped = <span class="keyword">true</span>;</div><div class="line"><a name="l01486"></a><span class="lineno"> 1486</span>  sum_of_fixed_terms += coeff * r.<a class="code" href="structoperations__research_1_1_affine_relation_1_1_relation.html#ae25fb5067bd6b3b1b319efc61685a98f">offset</a>;</div><div class="line"><a name="l01487"></a><span class="lineno"> 1487</span>  }</div><div class="line"><a name="l01488"></a><span class="lineno"> 1488</span>  tmp_terms_.push_back({r.representative, coeff * r.coeff});</div><div class="line"><a name="l01489"></a><span class="lineno"> 1489</span>  }</div><div class="line"><a name="l01490"></a><span class="lineno"> 1490</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->clear_vars();</div><div class="line"><a name="l01491"></a><span class="lineno"> 1491</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->clear_coeffs();</div><div class="line"><a name="l01492"></a><span class="lineno"> 1492</span>  std::sort(tmp_terms_.begin(), tmp_terms_.end());</div><div class="line"><a name="l01493"></a><span class="lineno"> 1493</span>  <span class="keywordtype">int</span> current_var = 0;</div><div class="line"><a name="l01494"></a><span class="lineno"> 1494</span>  int64_t current_coeff = 0;</div><div class="line"><a name="l01495"></a><span class="lineno"> 1495</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span> entry : tmp_terms_) {</div><div class="line"><a name="l01496"></a><span class="lineno"> 1496</span>  <a class="code" href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a>(<a class="code" href="namespaceoperations__research_1_1sat.html#a217338425de4389014563f1f24331713">RefIsPositive</a>(entry.first));</div><div class="line"><a name="l01497"></a><span class="lineno"> 1497</span>  <span class="keywordflow">if</span> (entry.first == current_var) {</div><div class="line"><a name="l01498"></a><span class="lineno"> 1498</span>  current_coeff += entry.second;</div><div class="line"><a name="l01499"></a><span class="lineno"> 1499</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l01500"></a><span class="lineno"> 1500</span>  <span class="keywordflow">if</span> (current_coeff != 0) {</div><div class="line"><a name="l01501"></a><span class="lineno"> 1501</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->add_vars(current_var);</div><div class="line"><a name="l01502"></a><span class="lineno"> 1502</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->add_coeffs(current_coeff);</div><div class="line"><a name="l01503"></a><span class="lineno"> 1503</span>  }</div><div class="line"><a name="l01504"></a><span class="lineno"> 1504</span>  current_var = entry.first;</div><div class="line"><a name="l01505"></a><span class="lineno"> 1505</span>  current_coeff = entry.second;</div><div class="line"><a name="l01506"></a><span class="lineno"> 1506</span>  }</div><div class="line"><a name="l01507"></a><span class="lineno"> 1507</span>  }</div><div class="line"><a name="l01508"></a><span class="lineno"> 1508</span>  <span class="keywordflow">if</span> (current_coeff != 0) {</div><div class="line"><a name="l01509"></a><span class="lineno"> 1509</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->add_vars(current_var);</div><div class="line"><a name="l01510"></a><span class="lineno"> 1510</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->add_coeffs(current_coeff);</div><div class="line"><a name="l01511"></a><span class="lineno"> 1511</span>  }</div><div class="line"><a name="l01512"></a><span class="lineno"> 1512</span>  <span class="keywordflow">if</span> (remapped) {</div><div class="line"><a name="l01513"></a><span class="lineno"> 1513</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"linear: remapped using affine relations"</span>);</div><div class="line"><a name="l01514"></a><span class="lineno"> 1514</span>  }</div><div class="line"><a name="l01515"></a><span class="lineno"> 1515</span>  <span class="keywordflow">if</span> (<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->vars().size() < old_size) {</div><div class="line"><a name="l01516"></a><span class="lineno"> 1516</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"linear: fixed or dup variables"</span>);</div><div class="line"><a name="l01517"></a><span class="lineno"> 1517</span>  }</div><div class="line"><a name="l01518"></a><span class="lineno"> 1518</span>  *offset = sum_of_fixed_terms;</div><div class="line"><a name="l01519"></a><span class="lineno"> 1519</span>  <span class="keywordflow">return</span> remapped || <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->vars().size() < old_size;</div><div class="line"><a name="l01520"></a><span class="lineno"> 1520</span> }</div><div class="line"><a name="l01521"></a><span class="lineno"> 1521</span> </div><div class="line"><a name="l01522"></a><span class="lineno"> 1522</span> <span class="keywordtype">bool</span> CpModelPresolver::CanonicalizeLinearExpression(</div><div class="line"><a name="l01523"></a><span class="lineno"> 1523</span>  <span class="keyword">const</span> ConstraintProto& <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>, LinearExpressionProto* exp) {</div><div class="line"><a name="l01524"></a><span class="lineno"> 1524</span>  int64_t offset = 0;</div><div class="line"><a name="l01525"></a><span class="lineno"> 1525</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> result = CanonicalizeLinearExpressionInternal(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>, exp, &offset);</div><div class="line"><a name="l01526"></a><span class="lineno"> 1526</span>  exp->set_offset(exp->offset() + offset);</div><div class="line"><a name="l01527"></a><span class="lineno"> 1527</span>  <span class="keywordflow">return</span> result;</div><div class="line"><a name="l01528"></a><span class="lineno"> 1528</span> }</div><div class="line"><a name="l01529"></a><span class="lineno"> 1529</span> </div><div class="line"><a name="l01530"></a><span class="lineno"> 1530</span> <span class="keywordtype">bool</span> CpModelPresolver::CanonicalizeLinear(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l01531"></a><span class="lineno"> 1531</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->constraint_case() != ConstraintProto::ConstraintCase::kLinear ||</div><div class="line"><a name="l01532"></a><span class="lineno"> 1532</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) {</div><div class="line"><a name="l01533"></a><span class="lineno"> 1533</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01534"></a><span class="lineno"> 1534</span>  }</div><div class="line"><a name="l01535"></a><span class="lineno"> 1535</span> </div><div class="line"><a name="l01536"></a><span class="lineno"> 1536</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().domain().empty()) {</div><div class="line"><a name="l01537"></a><span class="lineno"> 1537</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"linear: no domain"</span>);</div><div class="line"><a name="l01538"></a><span class="lineno"> 1538</span>  <span class="keywordflow">return</span> MarkConstraintAsFalse(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l01539"></a><span class="lineno"> 1539</span>  }</div><div class="line"><a name="l01540"></a><span class="lineno"> 1540</span> </div><div class="line"><a name="l01541"></a><span class="lineno"> 1541</span>  int64_t offset = 0;</div><div class="line"><a name="l01542"></a><span class="lineno"> 1542</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> result =</div><div class="line"><a name="l01543"></a><span class="lineno"> 1543</span>  CanonicalizeLinearExpressionInternal(*<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>, <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_linear(), &offset);</div><div class="line"><a name="l01544"></a><span class="lineno"> 1544</span>  <span class="keywordflow">if</span> (offset != 0) {</div><div class="line"><a name="l01545"></a><span class="lineno"> 1545</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a901c19b12842f8af153e588a689a90b5">FillDomainInProto</a>(</div><div class="line"><a name="l01546"></a><span class="lineno"> 1546</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#ab1240060466ba48a36a4b36379bce26a">ReadDomainFromProto</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear()).AdditionWith(Domain(-offset)),</div><div class="line"><a name="l01547"></a><span class="lineno"> 1547</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_linear());</div><div class="line"><a name="l01548"></a><span class="lineno"> 1548</span>  }</div><div class="line"><a name="l01549"></a><span class="lineno"> 1549</span>  DivideLinearByGcd(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l01550"></a><span class="lineno"> 1550</span>  <span class="keywordflow">return</span> result;</div><div class="line"><a name="l01551"></a><span class="lineno"> 1551</span> }</div><div class="line"><a name="l01552"></a><span class="lineno"> 1552</span> </div><div class="line"><a name="l01553"></a><span class="lineno"> 1553</span> <span class="keywordtype">bool</span> CpModelPresolver::RemoveSingletonInLinear(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l01554"></a><span class="lineno"> 1554</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->constraint_case() != ConstraintProto::ConstraintCase::kLinear ||</div><div class="line"><a name="l01555"></a><span class="lineno"> 1555</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) {</div><div class="line"><a name="l01556"></a><span class="lineno"> 1556</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01557"></a><span class="lineno"> 1557</span>  }</div><div class="line"><a name="l01558"></a><span class="lineno"> 1558</span> </div><div class="line"><a name="l01559"></a><span class="lineno"> 1559</span>  std::set<int> index_to_erase;</div><div class="line"><a name="l01560"></a><span class="lineno"> 1560</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> num_vars = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().vars().size();</div><div class="line"><a name="l01561"></a><span class="lineno"> 1561</span>  Domain rhs = <a class="code" href="namespaceoperations__research_1_1sat.html#ab1240060466ba48a36a4b36379bce26a">ReadDomainFromProto</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear());</div><div class="line"><a name="l01562"></a><span class="lineno"> 1562</span> </div><div class="line"><a name="l01563"></a><span class="lineno"> 1563</span>  <span class="comment">// First pass. Process singleton column that are not in the objective. Note</span></div><div class="line"><a name="l01564"></a><span class="lineno"> 1564</span>  <span class="comment">// that for postsolve, it is important that we process them in the same order</span></div><div class="line"><a name="l01565"></a><span class="lineno"> 1565</span>  <span class="comment">// in which they will be removed.</span></div><div class="line"><a name="l01566"></a><span class="lineno"> 1566</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num_vars; ++i) {</div><div class="line"><a name="l01567"></a><span class="lineno"> 1567</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().vars(i);</div><div class="line"><a name="l01568"></a><span class="lineno"> 1568</span>  <span class="keyword">const</span> int64_t coeff = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().coeffs(i);</div><div class="line"><a name="l01569"></a><span class="lineno"> 1569</span>  <a class="code" href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a>(<a class="code" href="namespaceoperations__research_1_1sat.html#a217338425de4389014563f1f24331713">RefIsPositive</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>));</div><div class="line"><a name="l01570"></a><span class="lineno"> 1570</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a54cf7f0077717d59a828b656b60c1615">VariableIsUniqueAndRemovable</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) {</div><div class="line"><a name="l01571"></a><span class="lineno"> 1571</span>  <span class="keywordtype">bool</span> exact;</div><div class="line"><a name="l01572"></a><span class="lineno"> 1572</span>  <span class="keyword">const</span> <span class="keyword">auto</span> term_domain =</div><div class="line"><a name="l01573"></a><span class="lineno"> 1573</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>).<a class="code" href="classoperations__research_1_1_domain.html#a63a708c626b59b4504ddb879496c894e">MultiplicationBy</a>(-coeff, &exact);</div><div class="line"><a name="l01574"></a><span class="lineno"> 1574</span>  <span class="keywordflow">if</span> (!exact) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l01575"></a><span class="lineno"> 1575</span> </div><div class="line"><a name="l01576"></a><span class="lineno"> 1576</span>  <span class="comment">// We do not do that if the domain of rhs becomes too complex.</span></div><div class="line"><a name="l01577"></a><span class="lineno"> 1577</span>  <span class="keyword">const</span> Domain new_rhs = rhs.<a class="code" href="classoperations__research_1_1_domain.html#a4f9af4a46ee07931e3e5e50f6ddfb8ad">AdditionWith</a>(term_domain);</div><div class="line"><a name="l01578"></a><span class="lineno"> 1578</span>  <span class="keywordflow">if</span> (new_rhs.NumIntervals() > 100) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l01579"></a><span class="lineno"> 1579</span> </div><div class="line"><a name="l01580"></a><span class="lineno"> 1580</span>  <span class="comment">// Note that we can't do that if we loose information in the</span></div><div class="line"><a name="l01581"></a><span class="lineno"> 1581</span>  <span class="comment">// multiplication above because the new domain might not be as strict</span></div><div class="line"><a name="l01582"></a><span class="lineno"> 1582</span>  <span class="comment">// as the initial constraint otherwise. TODO(user): because of the</span></div><div class="line"><a name="l01583"></a><span class="lineno"> 1583</span>  <span class="comment">// addition, it might be possible to cover more cases though.</span></div><div class="line"><a name="l01584"></a><span class="lineno"> 1584</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"linear: singleton column"</span>);</div><div class="line"><a name="l01585"></a><span class="lineno"> 1585</span>  index_to_erase.insert(i);</div><div class="line"><a name="l01586"></a><span class="lineno"> 1586</span>  rhs = new_rhs;</div><div class="line"><a name="l01587"></a><span class="lineno"> 1587</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l01588"></a><span class="lineno"> 1588</span>  }</div><div class="line"><a name="l01589"></a><span class="lineno"> 1589</span>  }</div><div class="line"><a name="l01590"></a><span class="lineno"> 1590</span> </div><div class="line"><a name="l01591"></a><span class="lineno"> 1591</span>  <span class="comment">// If we didn't find any, look for the one appearing in the objective.</span></div><div class="line"><a name="l01592"></a><span class="lineno"> 1592</span>  <span class="keywordflow">if</span> (index_to_erase.empty()) {</div><div class="line"><a name="l01593"></a><span class="lineno"> 1593</span>  <span class="comment">// Note that we only do that if we have a non-reified equality.</span></div><div class="line"><a name="l01594"></a><span class="lineno"> 1594</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aaabb604ccac4a6136be93bfe64e2290d">params</a>().<a class="code" href="classoperations__research_1_1sat_1_1_sat_parameters.html#a5afd677f3a39bcbd094567bae53c36b4">presolve_substitution_level</a>() <= 0) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01595"></a><span class="lineno"> 1595</span>  <span class="keywordflow">if</span> (!<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->enforcement_literal().empty()) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01596"></a><span class="lineno"> 1596</span> </div><div class="line"><a name="l01597"></a><span class="lineno"> 1597</span>  <span class="comment">// If it is possible to do so, note that we can transform constraint into</span></div><div class="line"><a name="l01598"></a><span class="lineno"> 1598</span>  <span class="comment">// equalities in PropagateDomainsInLinear().</span></div><div class="line"><a name="l01599"></a><span class="lineno"> 1599</span>  <span class="keywordflow">if</span> (rhs.Min() != rhs.Max()) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01600"></a><span class="lineno"> 1600</span> </div><div class="line"><a name="l01601"></a><span class="lineno"> 1601</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num_vars; ++i) {</div><div class="line"><a name="l01602"></a><span class="lineno"> 1602</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().vars(i);</div><div class="line"><a name="l01603"></a><span class="lineno"> 1603</span>  <span class="keyword">const</span> int64_t coeff = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().coeffs(i);</div><div class="line"><a name="l01604"></a><span class="lineno"> 1604</span>  <a class="code" href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a>(<a class="code" href="namespaceoperations__research_1_1sat.html#a217338425de4389014563f1f24331713">RefIsPositive</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>));</div><div class="line"><a name="l01605"></a><span class="lineno"> 1605</span> </div><div class="line"><a name="l01606"></a><span class="lineno"> 1606</span>  <span class="comment">// If the variable appear only in the objective and we have an equality,</span></div><div class="line"><a name="l01607"></a><span class="lineno"> 1607</span>  <span class="comment">// we can transfer the cost to the rest of the linear expression, and</span></div><div class="line"><a name="l01608"></a><span class="lineno"> 1608</span>  <span class="comment">// remove that variable.</span></div><div class="line"><a name="l01609"></a><span class="lineno"> 1609</span>  <span class="comment">//</span></div><div class="line"><a name="l01610"></a><span class="lineno"> 1610</span>  <span class="comment">// Note that is similar to the substitution code in PresolveLinear() but</span></div><div class="line"><a name="l01611"></a><span class="lineno"> 1611</span>  <span class="comment">// it doesn't require the variable to be implied free since we do not</span></div><div class="line"><a name="l01612"></a><span class="lineno"> 1612</span>  <span class="comment">// remove the constraints afterwards, just the variable.</span></div><div class="line"><a name="l01613"></a><span class="lineno"> 1613</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a34e2cd343e0dfb06af9f67df8c4c3502">VariableWithCostIsUniqueAndRemovable</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l01614"></a><span class="lineno"> 1614</span>  <a class="code" href="base_2logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a>(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a66fc178adf4c7e56b3a6f1a5e052d3e5">ObjectiveMap</a>().contains(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>));</div><div class="line"><a name="l01615"></a><span class="lineno"> 1615</span> </div><div class="line"><a name="l01616"></a><span class="lineno"> 1616</span>  <span class="comment">// We only support substitution that does not require to multiply the</span></div><div class="line"><a name="l01617"></a><span class="lineno"> 1617</span>  <span class="comment">// objective by some factor.</span></div><div class="line"><a name="l01618"></a><span class="lineno"> 1618</span>  <span class="comment">//</span></div><div class="line"><a name="l01619"></a><span class="lineno"> 1619</span>  <span class="comment">// TODO(user): If the objective is a single variable, we can actually</span></div><div class="line"><a name="l01620"></a><span class="lineno"> 1620</span>  <span class="comment">// "absorb" any factor into the objective scaling.</span></div><div class="line"><a name="l01621"></a><span class="lineno"> 1621</span>  <span class="keyword">const</span> int64_t objective_coeff =</div><div class="line"><a name="l01622"></a><span class="lineno"> 1622</span>  <a class="code" href="namespacegtl.html#abce27d097bc5680207b294bdad75f59f">gtl::FindOrDie</a>(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a66fc178adf4c7e56b3a6f1a5e052d3e5">ObjectiveMap</a>(), <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l01623"></a><span class="lineno"> 1623</span>  <a class="code" href="base_2logging_8h.html#ab25e01a2942b821d66371fc68d53f2eb">CHECK_NE</a>(coeff, 0);</div><div class="line"><a name="l01624"></a><span class="lineno"> 1624</span>  <span class="keywordflow">if</span> (objective_coeff % coeff != 0) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l01625"></a><span class="lineno"> 1625</span> </div><div class="line"><a name="l01626"></a><span class="lineno"> 1626</span>  <span class="comment">// We do not do that if the domain of rhs becomes too complex.</span></div><div class="line"><a name="l01627"></a><span class="lineno"> 1627</span>  <span class="keywordtype">bool</span> exact;</div><div class="line"><a name="l01628"></a><span class="lineno"> 1628</span>  <span class="keyword">const</span> <span class="keyword">auto</span> term_domain =</div><div class="line"><a name="l01629"></a><span class="lineno"> 1629</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>).<a class="code" href="classoperations__research_1_1_domain.html#a63a708c626b59b4504ddb879496c894e">MultiplicationBy</a>(-coeff, &exact);</div><div class="line"><a name="l01630"></a><span class="lineno"> 1630</span>  <span class="keywordflow">if</span> (!exact) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l01631"></a><span class="lineno"> 1631</span>  <span class="keyword">const</span> Domain new_rhs = rhs.<a class="code" href="classoperations__research_1_1_domain.html#a4f9af4a46ee07931e3e5e50f6ddfb8ad">AdditionWith</a>(term_domain);</div><div class="line"><a name="l01632"></a><span class="lineno"> 1632</span>  <span class="keywordflow">if</span> (new_rhs.NumIntervals() > 100) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l01633"></a><span class="lineno"> 1633</span> </div><div class="line"><a name="l01634"></a><span class="lineno"> 1634</span>  <span class="comment">// Special case: If the objective was a single variable, we can transfer</span></div><div class="line"><a name="l01635"></a><span class="lineno"> 1635</span>  <span class="comment">// the domain of var to the objective, and just completely remove this</span></div><div class="line"><a name="l01636"></a><span class="lineno"> 1636</span>  <span class="comment">// equality constraint like it is done in ExpandObjective().</span></div><div class="line"><a name="l01637"></a><span class="lineno"> 1637</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a66fc178adf4c7e56b3a6f1a5e052d3e5">ObjectiveMap</a>().size() == 1) {</div><div class="line"><a name="l01638"></a><span class="lineno"> 1638</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(</div><div class="line"><a name="l01639"></a><span class="lineno"> 1639</span>  <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>, context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a31d9b7763fd739fe805438b464096c32">ObjectiveDomain</a>().<a class="code" href="classoperations__research_1_1_domain.html#a1341b29865c5167a64de30c797672e4c">InverseMultiplicationBy</a>(</div><div class="line"><a name="l01640"></a><span class="lineno"> 1640</span>  objective_coeff))) {</div><div class="line"><a name="l01641"></a><span class="lineno"> 1641</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l01642"></a><span class="lineno"> 1642</span>  }</div><div class="line"><a name="l01643"></a><span class="lineno"> 1643</span> </div><div class="line"><a name="l01644"></a><span class="lineno"> 1644</span>  <span class="comment">// The intersection above might fix var, in which case, we just abort.</span></div><div class="line"><a name="l01645"></a><span class="lineno"> 1645</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#abb6eb29f56c3a33b8ae1b74b08b755c2">IsFixed</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l01646"></a><span class="lineno"> 1646</span> </div><div class="line"><a name="l01647"></a><span class="lineno"> 1647</span>  <span class="comment">// This makes sure the domain of var is propagated back to the</span></div><div class="line"><a name="l01648"></a><span class="lineno"> 1648</span>  <span class="comment">// objective.</span></div><div class="line"><a name="l01649"></a><span class="lineno"> 1649</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa62da782b2270ca293531a0aea153fba">CanonicalizeObjective</a>()) {</div><div class="line"><a name="l01650"></a><span class="lineno"> 1650</span>  <span class="keywordflow">return</span> context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5aa53538ba8adaa0bea1c3c0727425b0">NotifyThatModelIsUnsat</a>();</div><div class="line"><a name="l01651"></a><span class="lineno"> 1651</span>  }</div><div class="line"><a name="l01652"></a><span class="lineno"> 1652</span> </div><div class="line"><a name="l01653"></a><span class="lineno"> 1653</span>  <span class="comment">// Normally, CanonicalizeObjective() shouldn't remove var because</span></div><div class="line"><a name="l01654"></a><span class="lineno"> 1654</span>  <span class="comment">// we work on a linear constraint that has been canonicalized. We keep</span></div><div class="line"><a name="l01655"></a><span class="lineno"> 1655</span>  <span class="comment">// the test here in case this ever happen so we are notified.</span></div><div class="line"><a name="l01656"></a><span class="lineno"> 1656</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a66fc178adf4c7e56b3a6f1a5e052d3e5">ObjectiveMap</a>().contains(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) {</div><div class="line"><a name="l01657"></a><span class="lineno"> 1657</span>  <a class="code" href="base_2logging_8h.html#accad43a85d781d53381cd53a9894b6ae">LOG</a>(<a class="code" href="log__severity_8h.html#a50e5762f38854b37ee3e2851bc1bb0e7">WARNING</a>) << <span class="stringliteral">"This was not supposed to happen and the presolve "</span></div><div class="line"><a name="l01658"></a><span class="lineno"> 1658</span>  <span class="stringliteral">"could be improved."</span>;</div><div class="line"><a name="l01659"></a><span class="lineno"> 1659</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l01660"></a><span class="lineno"> 1660</span>  }</div><div class="line"><a name="l01661"></a><span class="lineno"> 1661</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"linear: singleton column define objective."</span>);</div><div class="line"><a name="l01662"></a><span class="lineno"> 1662</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a4bf47c6b5724e9a3a7df78486f9bdc41">SubstituteVariableInObjective</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>, coeff, *<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l01663"></a><span class="lineno"> 1663</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a6939dc7b9db01cf3deff10405e260461">MarkVariableAsRemoved</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l01664"></a><span class="lineno"> 1664</span>  *(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a4b3b9ef9c5f214dd4427daa2646eceda">mapping_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>()) = *<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>;</div><div class="line"><a name="l01665"></a><span class="lineno"> 1665</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l01666"></a><span class="lineno"> 1666</span>  }</div><div class="line"><a name="l01667"></a><span class="lineno"> 1667</span> </div><div class="line"><a name="l01668"></a><span class="lineno"> 1668</span>  <span class="comment">// Update the objective and remove the variable from its equality</span></div><div class="line"><a name="l01669"></a><span class="lineno"> 1669</span>  <span class="comment">// constraint by expanding its rhs. This might fail if the new linear</span></div><div class="line"><a name="l01670"></a><span class="lineno"> 1670</span>  <span class="comment">// objective expression can lead to overflow.</span></div><div class="line"><a name="l01671"></a><span class="lineno"> 1671</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a4bf47c6b5724e9a3a7df78486f9bdc41">SubstituteVariableInObjective</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>, coeff, *<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l01672"></a><span class="lineno"> 1672</span> </div><div class="line"><a name="l01673"></a><span class="lineno"> 1673</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(</div><div class="line"><a name="l01674"></a><span class="lineno"> 1674</span>  <span class="stringliteral">"linear: singleton column in equality and in objective."</span>);</div><div class="line"><a name="l01675"></a><span class="lineno"> 1675</span>  rhs = new_rhs;</div><div class="line"><a name="l01676"></a><span class="lineno"> 1676</span>  index_to_erase.insert(i);</div><div class="line"><a name="l01677"></a><span class="lineno"> 1677</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l01678"></a><span class="lineno"> 1678</span>  }</div><div class="line"><a name="l01679"></a><span class="lineno"> 1679</span>  }</div><div class="line"><a name="l01680"></a><span class="lineno"> 1680</span>  <span class="keywordflow">if</span> (index_to_erase.empty()) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01681"></a><span class="lineno"> 1681</span> </div><div class="line"><a name="l01682"></a><span class="lineno"> 1682</span>  <span class="comment">// TODO(user): we could add the constraint to mapping_model only once</span></div><div class="line"><a name="l01683"></a><span class="lineno"> 1683</span>  <span class="comment">// instead of adding a reduced version of it each time a new singleton</span></div><div class="line"><a name="l01684"></a><span class="lineno"> 1684</span>  <span class="comment">// variable appear in the same constraint later. That would work but would</span></div><div class="line"><a name="l01685"></a><span class="lineno"> 1685</span>  <span class="comment">// also force the postsolve to take search decisions...</span></div><div class="line"><a name="l01686"></a><span class="lineno"> 1686</span>  *(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a4b3b9ef9c5f214dd4427daa2646eceda">mapping_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>()) = *<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>;</div><div class="line"><a name="l01687"></a><span class="lineno"> 1687</span> </div><div class="line"><a name="l01688"></a><span class="lineno"> 1688</span>  <span class="keywordtype">int</span> new_size = 0;</div><div class="line"><a name="l01689"></a><span class="lineno"> 1689</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num_vars; ++i) {</div><div class="line"><a name="l01690"></a><span class="lineno"> 1690</span>  <span class="keywordflow">if</span> (index_to_erase.count(i)) {</div><div class="line"><a name="l01691"></a><span class="lineno"> 1691</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a6939dc7b9db01cf3deff10405e260461">MarkVariableAsRemoved</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().vars(i));</div><div class="line"><a name="l01692"></a><span class="lineno"> 1692</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l01693"></a><span class="lineno"> 1693</span>  }</div><div class="line"><a name="l01694"></a><span class="lineno"> 1694</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_linear()->set_coeffs(new_size, <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().coeffs(i));</div><div class="line"><a name="l01695"></a><span class="lineno"> 1695</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_linear()->set_vars(new_size, <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().vars(i));</div><div class="line"><a name="l01696"></a><span class="lineno"> 1696</span>  ++new_size;</div><div class="line"><a name="l01697"></a><span class="lineno"> 1697</span>  }</div><div class="line"><a name="l01698"></a><span class="lineno"> 1698</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_linear()->mutable_vars()->Truncate(new_size);</div><div class="line"><a name="l01699"></a><span class="lineno"> 1699</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_linear()->mutable_coeffs()->Truncate(new_size);</div><div class="line"><a name="l01700"></a><span class="lineno"> 1700</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a901c19b12842f8af153e588a689a90b5">FillDomainInProto</a>(rhs, <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_linear());</div><div class="line"><a name="l01701"></a><span class="lineno"> 1701</span>  DivideLinearByGcd(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l01702"></a><span class="lineno"> 1702</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l01703"></a><span class="lineno"> 1703</span> }</div><div class="line"><a name="l01704"></a><span class="lineno"> 1704</span> </div><div class="line"><a name="l01705"></a><span class="lineno"> 1705</span> <span class="keywordtype">bool</span> CpModelPresolver::PresolveSmallLinear(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l01706"></a><span class="lineno"> 1706</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->constraint_case() != ConstraintProto::ConstraintCase::kLinear ||</div><div class="line"><a name="l01707"></a><span class="lineno"> 1707</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) {</div><div class="line"><a name="l01708"></a><span class="lineno"> 1708</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01709"></a><span class="lineno"> 1709</span>  }</div><div class="line"><a name="l01710"></a><span class="lineno"> 1710</span> </div><div class="line"><a name="l01711"></a><span class="lineno"> 1711</span>  <span class="comment">// Empty constraint?</span></div><div class="line"><a name="l01712"></a><span class="lineno"> 1712</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().vars().empty()) {</div><div class="line"><a name="l01713"></a><span class="lineno"> 1713</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"linear: empty"</span>);</div><div class="line"><a name="l01714"></a><span class="lineno"> 1714</span>  <span class="keyword">const</span> Domain rhs = <a class="code" href="namespaceoperations__research_1_1sat.html#ab1240060466ba48a36a4b36379bce26a">ReadDomainFromProto</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear());</div><div class="line"><a name="l01715"></a><span class="lineno"> 1715</span>  <span class="keywordflow">if</span> (rhs.Contains(0)) {</div><div class="line"><a name="l01716"></a><span class="lineno"> 1716</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l01717"></a><span class="lineno"> 1717</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l01718"></a><span class="lineno"> 1718</span>  <span class="keywordflow">return</span> MarkConstraintAsFalse(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l01719"></a><span class="lineno"> 1719</span>  }</div><div class="line"><a name="l01720"></a><span class="lineno"> 1720</span>  }</div><div class="line"><a name="l01721"></a><span class="lineno"> 1721</span> </div><div class="line"><a name="l01722"></a><span class="lineno"> 1722</span>  <span class="comment">// If the constraint is literal => x in domain and x = abs(abs_arg), we can</span></div><div class="line"><a name="l01723"></a><span class="lineno"> 1723</span>  <span class="comment">// replace x by abs_arg and hopefully remove the variable x later.</span></div><div class="line"><a name="l01724"></a><span class="lineno"> 1724</span>  <span class="keywordtype">int</span> abs_arg;</div><div class="line"><a name="l01725"></a><span class="lineno"> 1725</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().vars_size() == 1 && <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->enforcement_literal_size() > 0 &&</div><div class="line"><a name="l01726"></a><span class="lineno"> 1726</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().coeffs(0) == 1 &&</div><div class="line"><a name="l01727"></a><span class="lineno"> 1727</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af97bdc26758ff0f27314cafb7c2d7044">GetAbsRelation</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().vars(0), &abs_arg)) {</div><div class="line"><a name="l01728"></a><span class="lineno"> 1728</span>  <span class="comment">// TODO(user): Deal with coeff = -1, here or during canonicalization.</span></div><div class="line"><a name="l01729"></a><span class="lineno"> 1729</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"linear: remove abs from abs(x) in domain"</span>);</div><div class="line"><a name="l01730"></a><span class="lineno"> 1730</span>  <span class="keyword">const</span> Domain implied_abs_target_domain =</div><div class="line"><a name="l01731"></a><span class="lineno"> 1731</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#ab1240060466ba48a36a4b36379bce26a">ReadDomainFromProto</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear())</div><div class="line"><a name="l01732"></a><span class="lineno"> 1732</span>  .IntersectionWith({0, <a class="code" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::numeric_limits<int64_t>::max</a>()})</div><div class="line"><a name="l01733"></a><span class="lineno"> 1733</span>  .IntersectionWith(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().vars(0)));</div><div class="line"><a name="l01734"></a><span class="lineno"> 1734</span> </div><div class="line"><a name="l01735"></a><span class="lineno"> 1735</span>  <span class="keywordflow">if</span> (implied_abs_target_domain.IsEmpty()) {</div><div class="line"><a name="l01736"></a><span class="lineno"> 1736</span>  <span class="keywordflow">return</span> MarkConstraintAsFalse(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l01737"></a><span class="lineno"> 1737</span>  }</div><div class="line"><a name="l01738"></a><span class="lineno"> 1738</span> </div><div class="line"><a name="l01739"></a><span class="lineno"> 1739</span>  <span class="keyword">const</span> Domain new_abs_var_domain =</div><div class="line"><a name="l01740"></a><span class="lineno"> 1740</span>  implied_abs_target_domain</div><div class="line"><a name="l01741"></a><span class="lineno"> 1741</span>  .UnionWith(implied_abs_target_domain.Negation())</div><div class="line"><a name="l01742"></a><span class="lineno"> 1742</span>  .IntersectionWith(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(abs_arg));</div><div class="line"><a name="l01743"></a><span class="lineno"> 1743</span> </div><div class="line"><a name="l01744"></a><span class="lineno"> 1744</span>  <span class="keywordflow">if</span> (new_abs_var_domain.IsEmpty()) {</div><div class="line"><a name="l01745"></a><span class="lineno"> 1745</span>  <span class="keywordflow">return</span> MarkConstraintAsFalse(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l01746"></a><span class="lineno"> 1746</span>  }</div><div class="line"><a name="l01747"></a><span class="lineno"> 1747</span> </div><div class="line"><a name="l01748"></a><span class="lineno"> 1748</span>  ConstraintProto* new_ct = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>();</div><div class="line"><a name="l01749"></a><span class="lineno"> 1749</span>  new_ct-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a74f7eb449a6e182b73c8b4a1dbf15ce6">set_name</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->name());</div><div class="line"><a name="l01750"></a><span class="lineno"> 1750</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a> : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->enforcement_literal()) {</div><div class="line"><a name="l01751"></a><span class="lineno"> 1751</span>  new_ct->add_enforcement_literal(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>);</div><div class="line"><a name="l01752"></a><span class="lineno"> 1752</span>  }</div><div class="line"><a name="l01753"></a><span class="lineno"> 1753</span>  <span class="keyword">auto</span>* arg = new_ct->mutable_linear();</div><div class="line"><a name="l01754"></a><span class="lineno"> 1754</span>  arg->add_vars(abs_arg);</div><div class="line"><a name="l01755"></a><span class="lineno"> 1755</span>  arg->add_coeffs(1);</div><div class="line"><a name="l01756"></a><span class="lineno"> 1756</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a901c19b12842f8af153e588a689a90b5">FillDomainInProto</a>(new_abs_var_domain, new_ct->mutable_linear());</div><div class="line"><a name="l01757"></a><span class="lineno"> 1757</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l01758"></a><span class="lineno"> 1758</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l01759"></a><span class="lineno"> 1759</span>  }</div><div class="line"><a name="l01760"></a><span class="lineno"> 1760</span> </div><div class="line"><a name="l01761"></a><span class="lineno"> 1761</span>  <span class="comment">// Detect encoding.</span></div><div class="line"><a name="l01762"></a><span class="lineno"> 1762</span>  <span class="keywordflow">if</span> (<a class="code" href="namespaceoperations__research_1_1sat.html#a42a3b266d8c6dfab1c14baa6c04e2333">HasEnforcementLiteral</a>(*<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) {</div><div class="line"><a name="l01763"></a><span class="lineno"> 1763</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->enforcement_literal_size() != 1 || <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().vars_size() != 1 ||</div><div class="line"><a name="l01764"></a><span class="lineno"> 1764</span>  (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().coeffs(0) != 1 && <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().coeffs(0) == -1)) {</div><div class="line"><a name="l01765"></a><span class="lineno"> 1765</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01766"></a><span class="lineno"> 1766</span>  }</div><div class="line"><a name="l01767"></a><span class="lineno"> 1767</span> </div><div class="line"><a name="l01768"></a><span class="lineno"> 1768</span>  <span class="comment">// Currently, we only use encoding during expansion, so when it is done,</span></div><div class="line"><a name="l01769"></a><span class="lineno"> 1769</span>  <span class="comment">// there is no need to updates the maps.</span></div><div class="line"><a name="l01770"></a><span class="lineno"> 1770</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a13c8d5cf71bf7735663c489f5493d036">ModelIsExpanded</a>()) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01771"></a><span class="lineno"> 1771</span> </div><div class="line"><a name="l01772"></a><span class="lineno"> 1772</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a> = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->enforcement_literal(0);</div><div class="line"><a name="l01773"></a><span class="lineno"> 1773</span>  <span class="keyword">const</span> LinearConstraintProto& linear = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear();</div><div class="line"><a name="l01774"></a><span class="lineno"> 1774</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> ref = linear.vars(0);</div><div class="line"><a name="l01775"></a><span class="lineno"> 1775</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = <a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(ref);</div><div class="line"><a name="l01776"></a><span class="lineno"> 1776</span>  <span class="keyword">const</span> int64_t coeff =</div><div class="line"><a name="l01777"></a><span class="lineno"> 1777</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a217338425de4389014563f1f24331713">RefIsPositive</a>(ref) ? <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().coeffs(0) : -<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().coeffs(0);</div><div class="line"><a name="l01778"></a><span class="lineno"> 1778</span> </div><div class="line"><a name="l01779"></a><span class="lineno"> 1779</span>  <span class="keywordflow">if</span> (linear.domain_size() == 2 && linear.domain(0) == linear.domain(1)) {</div><div class="line"><a name="l01780"></a><span class="lineno"> 1780</span>  <span class="keyword">const</span> int64_t <a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a> = <a class="code" href="namespaceoperations__research_1_1sat.html#a217338425de4389014563f1f24331713">RefIsPositive</a>(ref) ? linear.domain(0) * coeff</div><div class="line"><a name="l01781"></a><span class="lineno"> 1781</span>  : -linear.domain(0) * coeff;</div><div class="line"><a name="l01782"></a><span class="lineno"> 1782</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#afdf0f5e877efe4e1d003300f0ce1234f">StoreLiteralImpliesVarEqValue</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>, <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>, <a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a>)) {</div><div class="line"><a name="l01783"></a><span class="lineno"> 1783</span>  <span class="comment">// The domain is not actually modified, but we want to rescan the</span></div><div class="line"><a name="l01784"></a><span class="lineno"> 1784</span>  <span class="comment">// constraints linked to this variable. See TODO below.</span></div><div class="line"><a name="l01785"></a><span class="lineno"> 1785</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a02302d3a45d02003dcbf288d045ebd86">modified_domains</a>.<a class="code" href="classoperations__research_1_1_sparse_bitset.html#a41f798a04019147982b29c576ff9d8b7">Set</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l01786"></a><span class="lineno"> 1786</span>  }</div><div class="line"><a name="l01787"></a><span class="lineno"> 1787</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l01788"></a><span class="lineno"> 1788</span>  <span class="keyword">const</span> Domain complement = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(ref).<a class="code" href="classoperations__research_1_1_domain.html#a835826c4c5129b74553042a357a721ff">IntersectionWith</a>(</div><div class="line"><a name="l01789"></a><span class="lineno"> 1789</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#ab1240060466ba48a36a4b36379bce26a">ReadDomainFromProto</a>(linear).Complement());</div><div class="line"><a name="l01790"></a><span class="lineno"> 1790</span>  <span class="keywordflow">if</span> (complement.Size() != 1) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01791"></a><span class="lineno"> 1791</span>  <span class="keyword">const</span> int64_t <a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a> = <a class="code" href="namespaceoperations__research_1_1sat.html#a217338425de4389014563f1f24331713">RefIsPositive</a>(ref) ? complement.Min() * coeff</div><div class="line"><a name="l01792"></a><span class="lineno"> 1792</span>  : -complement.Min() * coeff;</div><div class="line"><a name="l01793"></a><span class="lineno"> 1793</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a2877bce637c80df492977b5b6487d563">StoreLiteralImpliesVarNEqValue</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>, <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>, <a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a>)) {</div><div class="line"><a name="l01794"></a><span class="lineno"> 1794</span>  <span class="comment">// The domain is not actually modified, but we want to rescan the</span></div><div class="line"><a name="l01795"></a><span class="lineno"> 1795</span>  <span class="comment">// constraints linked to this variable. See TODO below.</span></div><div class="line"><a name="l01796"></a><span class="lineno"> 1796</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a02302d3a45d02003dcbf288d045ebd86">modified_domains</a>.<a class="code" href="classoperations__research_1_1_sparse_bitset.html#a41f798a04019147982b29c576ff9d8b7">Set</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l01797"></a><span class="lineno"> 1797</span>  }</div><div class="line"><a name="l01798"></a><span class="lineno"> 1798</span>  }</div><div class="line"><a name="l01799"></a><span class="lineno"> 1799</span> </div><div class="line"><a name="l01800"></a><span class="lineno"> 1800</span>  <span class="comment">// TODO(user): if we have l1 <=> x == value && l2 => x == value, we</span></div><div class="line"><a name="l01801"></a><span class="lineno"> 1801</span>  <span class="comment">// could rewrite the second constraint into l2 => l1.</span></div><div class="line"><a name="l01802"></a><span class="lineno"> 1802</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l01803"></a><span class="lineno"> 1803</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01804"></a><span class="lineno"> 1804</span>  }</div><div class="line"><a name="l01805"></a><span class="lineno"> 1805</span> </div><div class="line"><a name="l01806"></a><span class="lineno"> 1806</span>  <span class="comment">// Size one constraint?</span></div><div class="line"><a name="l01807"></a><span class="lineno"> 1807</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().vars().size() == 1) {</div><div class="line"><a name="l01808"></a><span class="lineno"> 1808</span>  <span class="keyword">const</span> int64_t coeff = <a class="code" href="namespaceoperations__research_1_1sat.html#a217338425de4389014563f1f24331713">RefIsPositive</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().vars(0))</div><div class="line"><a name="l01809"></a><span class="lineno"> 1809</span>  ? <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().coeffs(0)</div><div class="line"><a name="l01810"></a><span class="lineno"> 1810</span>  : -<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().coeffs(0);</div><div class="line"><a name="l01811"></a><span class="lineno"> 1811</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"linear: size one"</span>);</div><div class="line"><a name="l01812"></a><span class="lineno"> 1812</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = <a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().vars(0));</div><div class="line"><a name="l01813"></a><span class="lineno"> 1813</span>  <span class="keyword">const</span> Domain rhs = <a class="code" href="namespaceoperations__research_1_1sat.html#ab1240060466ba48a36a4b36379bce26a">ReadDomainFromProto</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear());</div><div class="line"><a name="l01814"></a><span class="lineno"> 1814</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>,</div><div class="line"><a name="l01815"></a><span class="lineno"> 1815</span>  rhs.InverseMultiplicationBy(coeff))) {</div><div class="line"><a name="l01816"></a><span class="lineno"> 1816</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l01817"></a><span class="lineno"> 1817</span>  }</div><div class="line"><a name="l01818"></a><span class="lineno"> 1818</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l01819"></a><span class="lineno"> 1819</span>  }</div><div class="line"><a name="l01820"></a><span class="lineno"> 1820</span> </div><div class="line"><a name="l01821"></a><span class="lineno"> 1821</span>  <span class="comment">// Detect affine relation.</span></div><div class="line"><a name="l01822"></a><span class="lineno"> 1822</span>  <span class="comment">//</span></div><div class="line"><a name="l01823"></a><span class="lineno"> 1823</span>  <span class="comment">// TODO(user): it might be better to first add only the affine relation with</span></div><div class="line"><a name="l01824"></a><span class="lineno"> 1824</span>  <span class="comment">// a coefficient of magnitude 1, and later the one with larger coeffs.</span></div><div class="line"><a name="l01825"></a><span class="lineno"> 1825</span>  <span class="keyword">const</span> LinearConstraintProto& arg = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear();</div><div class="line"><a name="l01826"></a><span class="lineno"> 1826</span>  <span class="keywordflow">if</span> (arg.vars_size() == 2) {</div><div class="line"><a name="l01827"></a><span class="lineno"> 1827</span>  <span class="keyword">const</span> Domain rhs = <a class="code" href="namespaceoperations__research_1_1sat.html#ab1240060466ba48a36a4b36379bce26a">ReadDomainFromProto</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear());</div><div class="line"><a name="l01828"></a><span class="lineno"> 1828</span>  <span class="keyword">const</span> int64_t rhs_min = rhs.<a class="code" href="classoperations__research_1_1_domain.html#a8cf21a67f7d81a800ff912239bb2db64">Min</a>();</div><div class="line"><a name="l01829"></a><span class="lineno"> 1829</span>  <span class="keyword">const</span> int64_t rhs_max = rhs.Max();</div><div class="line"><a name="l01830"></a><span class="lineno"> 1830</span>  <span class="keywordflow">if</span> (rhs_min == rhs_max) {</div><div class="line"><a name="l01831"></a><span class="lineno"> 1831</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> v1 = arg.vars(0);</div><div class="line"><a name="l01832"></a><span class="lineno"> 1832</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> v2 = arg.vars(1);</div><div class="line"><a name="l01833"></a><span class="lineno"> 1833</span>  <span class="keyword">const</span> int64_t coeff1 = arg.coeffs(0);</div><div class="line"><a name="l01834"></a><span class="lineno"> 1834</span>  <span class="keyword">const</span> int64_t coeff2 = arg.coeffs(1);</div><div class="line"><a name="l01835"></a><span class="lineno"> 1835</span>  <span class="keywordtype">bool</span> added = <span class="keyword">false</span>;</div><div class="line"><a name="l01836"></a><span class="lineno"> 1836</span>  <span class="keywordflow">if</span> (coeff1 == 1) {</div><div class="line"><a name="l01837"></a><span class="lineno"> 1837</span>  added = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a3999a4ff1f53b54b40c8cd396105572a">StoreAffineRelation</a>(v1, v2, -coeff2, rhs_max);</div><div class="line"><a name="l01838"></a><span class="lineno"> 1838</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (coeff2 == 1) {</div><div class="line"><a name="l01839"></a><span class="lineno"> 1839</span>  added = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a3999a4ff1f53b54b40c8cd396105572a">StoreAffineRelation</a>(v2, v1, -coeff1, rhs_max);</div><div class="line"><a name="l01840"></a><span class="lineno"> 1840</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (coeff1 == -1) {</div><div class="line"><a name="l01841"></a><span class="lineno"> 1841</span>  added = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a3999a4ff1f53b54b40c8cd396105572a">StoreAffineRelation</a>(v1, v2, coeff2, -rhs_max);</div><div class="line"><a name="l01842"></a><span class="lineno"> 1842</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (coeff2 == -1) {</div><div class="line"><a name="l01843"></a><span class="lineno"> 1843</span>  added = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a3999a4ff1f53b54b40c8cd396105572a">StoreAffineRelation</a>(v2, v1, coeff1, -rhs_max);</div><div class="line"><a name="l01844"></a><span class="lineno"> 1844</span>  }</div><div class="line"><a name="l01845"></a><span class="lineno"> 1845</span>  <span class="keywordflow">if</span> (added) <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l01846"></a><span class="lineno"> 1846</span>  }</div><div class="line"><a name="l01847"></a><span class="lineno"> 1847</span>  }</div><div class="line"><a name="l01848"></a><span class="lineno"> 1848</span> </div><div class="line"><a name="l01849"></a><span class="lineno"> 1849</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01850"></a><span class="lineno"> 1850</span> }</div><div class="line"><a name="l01851"></a><span class="lineno"> 1851</span> </div><div class="line"><a name="l01852"></a><span class="lineno"> 1852</span> <span class="keyword">namespace </span>{</div><div class="line"><a name="l01853"></a><span class="lineno"> 1853</span> </div><div class="line"><a name="l01854"></a><span class="lineno"> 1854</span> <span class="comment">// Return true if the given domain only restrict the values with an upper bound.</span></div><div class="line"><a name="l01855"></a><span class="lineno"> 1855</span> <span class="keywordtype">bool</span> IsLeConstraint(<span class="keyword">const</span> Domain& domain, <span class="keyword">const</span> Domain& all_values) {</div><div class="line"><a name="l01856"></a><span class="lineno"> 1856</span>  <span class="keywordflow">return</span> all_values</div><div class="line"><a name="l01857"></a><span class="lineno"> 1857</span>  .IntersectionWith(</div><div class="line"><a name="l01858"></a><span class="lineno"> 1858</span>  Domain(<a class="code" href="alldiff__cst_8cc.html#ad10edae0a852d72fb76afb1c77735045">std::numeric_limits<int64_t>::min</a>(), domain.Max()))</div><div class="line"><a name="l01859"></a><span class="lineno"> 1859</span>  .IsIncludedIn(domain);</div><div class="line"><a name="l01860"></a><span class="lineno"> 1860</span> }</div><div class="line"><a name="l01861"></a><span class="lineno"> 1861</span> </div><div class="line"><a name="l01862"></a><span class="lineno"> 1862</span> <span class="comment">// Same as IsLeConstraint() but in the other direction.</span></div><div class="line"><a name="l01863"></a><span class="lineno"> 1863</span> <span class="keywordtype">bool</span> IsGeConstraint(<span class="keyword">const</span> Domain& domain, <span class="keyword">const</span> Domain& all_values) {</div><div class="line"><a name="l01864"></a><span class="lineno"> 1864</span>  <span class="keywordflow">return</span> all_values</div><div class="line"><a name="l01865"></a><span class="lineno"> 1865</span>  .IntersectionWith(</div><div class="line"><a name="l01866"></a><span class="lineno"> 1866</span>  Domain(domain.Min(), <a class="code" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::numeric_limits<int64_t>::max</a>()))</div><div class="line"><a name="l01867"></a><span class="lineno"> 1867</span>  .IsIncludedIn(domain);</div><div class="line"><a name="l01868"></a><span class="lineno"> 1868</span> }</div><div class="line"><a name="l01869"></a><span class="lineno"> 1869</span> </div><div class="line"><a name="l01870"></a><span class="lineno"> 1870</span> <span class="comment">// In the equation terms + coeff * var_domain \included rhs, returns true if can</span></div><div class="line"><a name="l01871"></a><span class="lineno"> 1871</span> <span class="comment">// we always fix rhs to its min value for any value in terms. It is okay to</span></div><div class="line"><a name="l01872"></a><span class="lineno"> 1872</span> <span class="comment">// not be as generic as possible here.</span></div><div class="line"><a name="l01873"></a><span class="lineno"> 1873</span> <span class="keywordtype">bool</span> RhsCanBeFixedToMin(int64_t coeff, <span class="keyword">const</span> Domain& var_domain,</div><div class="line"><a name="l01874"></a><span class="lineno"> 1874</span>  <span class="keyword">const</span> Domain& terms, <span class="keyword">const</span> Domain& rhs) {</div><div class="line"><a name="l01875"></a><span class="lineno"> 1875</span>  <span class="keywordflow">if</span> (var_domain.NumIntervals() != 1) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01876"></a><span class="lineno"> 1876</span>  <span class="keywordflow">if</span> (std::abs(coeff) != 1) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01877"></a><span class="lineno"> 1877</span> </div><div class="line"><a name="l01878"></a><span class="lineno"> 1878</span>  <span class="comment">// If for all values in terms, there is one value below rhs.Min(), then</span></div><div class="line"><a name="l01879"></a><span class="lineno"> 1879</span>  <span class="comment">// because we add only one integer interval, if there is a feasible value, it</span></div><div class="line"><a name="l01880"></a><span class="lineno"> 1880</span>  <span class="comment">// can be at rhs.Min().</span></div><div class="line"><a name="l01881"></a><span class="lineno"> 1881</span>  <span class="comment">//</span></div><div class="line"><a name="l01882"></a><span class="lineno"> 1882</span>  <span class="comment">// TODO(user): generalize to larger coeff magnitude if rhs is also a multiple</span></div><div class="line"><a name="l01883"></a><span class="lineno"> 1883</span>  <span class="comment">// or if terms is a multiple.</span></div><div class="line"><a name="l01884"></a><span class="lineno"> 1884</span>  <span class="keywordflow">if</span> (coeff == 1 && terms.Max() + var_domain.Min() <= rhs.Min()) {</div><div class="line"><a name="l01885"></a><span class="lineno"> 1885</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l01886"></a><span class="lineno"> 1886</span>  }</div><div class="line"><a name="l01887"></a><span class="lineno"> 1887</span>  <span class="keywordflow">if</span> (coeff == -1 && terms.Max() - var_domain.Max() <= rhs.Min()) {</div><div class="line"><a name="l01888"></a><span class="lineno"> 1888</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l01889"></a><span class="lineno"> 1889</span>  }</div><div class="line"><a name="l01890"></a><span class="lineno"> 1890</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01891"></a><span class="lineno"> 1891</span> }</div><div class="line"><a name="l01892"></a><span class="lineno"> 1892</span> </div><div class="line"><a name="l01893"></a><span class="lineno"> 1893</span> <span class="keywordtype">bool</span> RhsCanBeFixedToMax(int64_t coeff, <span class="keyword">const</span> Domain& var_domain,</div><div class="line"><a name="l01894"></a><span class="lineno"> 1894</span>  <span class="keyword">const</span> Domain& terms, <span class="keyword">const</span> Domain& rhs) {</div><div class="line"><a name="l01895"></a><span class="lineno"> 1895</span>  <span class="keywordflow">if</span> (var_domain.NumIntervals() != 1) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01896"></a><span class="lineno"> 1896</span>  <span class="keywordflow">if</span> (std::abs(coeff) != 1) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01897"></a><span class="lineno"> 1897</span> </div><div class="line"><a name="l01898"></a><span class="lineno"> 1898</span>  <span class="keywordflow">if</span> (coeff == 1 && terms.Min() + var_domain.Max() >= rhs.Max()) {</div><div class="line"><a name="l01899"></a><span class="lineno"> 1899</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l01900"></a><span class="lineno"> 1900</span>  }</div><div class="line"><a name="l01901"></a><span class="lineno"> 1901</span>  <span class="keywordflow">if</span> (coeff == -1 && terms.Min() - var_domain.Min() >= rhs.Max()) {</div><div class="line"><a name="l01902"></a><span class="lineno"> 1902</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l01903"></a><span class="lineno"> 1903</span>  }</div><div class="line"><a name="l01904"></a><span class="lineno"> 1904</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01905"></a><span class="lineno"> 1905</span> }</div><div class="line"><a name="l01906"></a><span class="lineno"> 1906</span> </div><div class="line"><a name="l01907"></a><span class="lineno"> 1907</span> <span class="comment">// Remove from to_clear any entry not in current.</span></div><div class="line"><a name="l01908"></a><span class="lineno"> 1908</span> <span class="keywordtype">void</span> TakeIntersectionWith(<span class="keyword">const</span> absl::flat_hash_set<int>& current,</div><div class="line"><a name="l01909"></a><span class="lineno"> 1909</span>  absl::flat_hash_set<int>* to_clear) {</div><div class="line"><a name="l01910"></a><span class="lineno"> 1910</span>  std::vector<int> new_set;</div><div class="line"><a name="l01911"></a><span class="lineno"> 1911</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> c : *to_clear) {</div><div class="line"><a name="l01912"></a><span class="lineno"> 1912</span>  <span class="keywordflow">if</span> (current.contains(c)) new_set.push_back(c);</div><div class="line"><a name="l01913"></a><span class="lineno"> 1913</span>  }</div><div class="line"><a name="l01914"></a><span class="lineno"> 1914</span>  to_clear->clear();</div><div class="line"><a name="l01915"></a><span class="lineno"> 1915</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> c : new_set) to_clear->insert(c);</div><div class="line"><a name="l01916"></a><span class="lineno"> 1916</span> }</div><div class="line"><a name="l01917"></a><span class="lineno"> 1917</span> </div><div class="line"><a name="l01918"></a><span class="lineno"> 1918</span> } <span class="comment">// namespace</span></div><div class="line"><a name="l01919"></a><span class="lineno"> 1919</span> </div><div class="line"><a name="l01920"></a><span class="lineno"> 1920</span> <span class="keywordtype">bool</span> CpModelPresolver::PropagateDomainsInLinear(<span class="keywordtype">int</span> ct_index,</div><div class="line"><a name="l01921"></a><span class="lineno"> 1921</span>  ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l01922"></a><span class="lineno"> 1922</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->constraint_case() != ConstraintProto::ConstraintCase::kLinear ||</div><div class="line"><a name="l01923"></a><span class="lineno"> 1923</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) {</div><div class="line"><a name="l01924"></a><span class="lineno"> 1924</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01925"></a><span class="lineno"> 1925</span>  }</div><div class="line"><a name="l01926"></a><span class="lineno"> 1926</span> </div><div class="line"><a name="l01927"></a><span class="lineno"> 1927</span>  <span class="comment">// Compute the implied rhs bounds from the variable ones.</span></div><div class="line"><a name="l01928"></a><span class="lineno"> 1928</span>  <span class="keyword">auto</span>& term_domains = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ac3d1eecbbf2000282606576273ccf06c">tmp_term_domains</a>;</div><div class="line"><a name="l01929"></a><span class="lineno"> 1929</span>  <span class="keyword">auto</span>& left_domains = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a7305c507aa07aea8104037f2e2441876">tmp_left_domains</a>;</div><div class="line"><a name="l01930"></a><span class="lineno"> 1930</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> num_vars = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().vars_size();</div><div class="line"><a name="l01931"></a><span class="lineno"> 1931</span>  term_domains.resize(num_vars + 1);</div><div class="line"><a name="l01932"></a><span class="lineno"> 1932</span>  left_domains.resize(num_vars + 1);</div><div class="line"><a name="l01933"></a><span class="lineno"> 1933</span>  left_domains[0] = Domain(0);</div><div class="line"><a name="l01934"></a><span class="lineno"> 1934</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num_vars; ++i) {</div><div class="line"><a name="l01935"></a><span class="lineno"> 1935</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().vars(i);</div><div class="line"><a name="l01936"></a><span class="lineno"> 1936</span>  <span class="keyword">const</span> int64_t coeff = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().coeffs(i);</div><div class="line"><a name="l01937"></a><span class="lineno"> 1937</span>  <a class="code" href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a>(<a class="code" href="namespaceoperations__research_1_1sat.html#a217338425de4389014563f1f24331713">RefIsPositive</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>));</div><div class="line"><a name="l01938"></a><span class="lineno"> 1938</span>  term_domains[i] = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>).<a class="code" href="classoperations__research_1_1_domain.html#a63a708c626b59b4504ddb879496c894e">MultiplicationBy</a>(coeff);</div><div class="line"><a name="l01939"></a><span class="lineno"> 1939</span>  left_domains[i + 1] =</div><div class="line"><a name="l01940"></a><span class="lineno"> 1940</span>  left_domains[i].<a class="code" href="classoperations__research_1_1_domain.html#a4f9af4a46ee07931e3e5e50f6ddfb8ad">AdditionWith</a>(term_domains[i]).<a class="code" href="classoperations__research_1_1_domain.html#abd2c59687cc53dda333d0f18c457389b">RelaxIfTooComplex</a>();</div><div class="line"><a name="l01941"></a><span class="lineno"> 1941</span>  }</div><div class="line"><a name="l01942"></a><span class="lineno"> 1942</span>  <span class="keyword">const</span> Domain& implied_rhs = left_domains[num_vars];</div><div class="line"><a name="l01943"></a><span class="lineno"> 1943</span> </div><div class="line"><a name="l01944"></a><span class="lineno"> 1944</span>  <span class="comment">// Abort if trivial.</span></div><div class="line"><a name="l01945"></a><span class="lineno"> 1945</span>  <span class="keyword">const</span> Domain old_rhs = <a class="code" href="namespaceoperations__research_1_1sat.html#ab1240060466ba48a36a4b36379bce26a">ReadDomainFromProto</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear());</div><div class="line"><a name="l01946"></a><span class="lineno"> 1946</span>  <span class="keywordflow">if</span> (implied_rhs.IsIncludedIn(old_rhs)) {</div><div class="line"><a name="l01947"></a><span class="lineno"> 1947</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"linear: always true"</span>);</div><div class="line"><a name="l01948"></a><span class="lineno"> 1948</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l01949"></a><span class="lineno"> 1949</span>  }</div><div class="line"><a name="l01950"></a><span class="lineno"> 1950</span> </div><div class="line"><a name="l01951"></a><span class="lineno"> 1951</span>  <span class="comment">// Incorporate the implied rhs information.</span></div><div class="line"><a name="l01952"></a><span class="lineno"> 1952</span>  Domain rhs = old_rhs.SimplifyUsingImpliedDomain(implied_rhs);</div><div class="line"><a name="l01953"></a><span class="lineno"> 1953</span>  <span class="keywordflow">if</span> (rhs.IsEmpty()) {</div><div class="line"><a name="l01954"></a><span class="lineno"> 1954</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"linear: infeasible"</span>);</div><div class="line"><a name="l01955"></a><span class="lineno"> 1955</span>  <span class="keywordflow">return</span> MarkConstraintAsFalse(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l01956"></a><span class="lineno"> 1956</span>  }</div><div class="line"><a name="l01957"></a><span class="lineno"> 1957</span>  <span class="keywordflow">if</span> (rhs != old_rhs) {</div><div class="line"><a name="l01958"></a><span class="lineno"> 1958</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"linear: simplified rhs"</span>);</div><div class="line"><a name="l01959"></a><span class="lineno"> 1959</span>  }</div><div class="line"><a name="l01960"></a><span class="lineno"> 1960</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a901c19b12842f8af153e588a689a90b5">FillDomainInProto</a>(rhs, <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_linear());</div><div class="line"><a name="l01961"></a><span class="lineno"> 1961</span> </div><div class="line"><a name="l01962"></a><span class="lineno"> 1962</span>  <span class="comment">// Detect if it is always good for a term of this constraint to move towards</span></div><div class="line"><a name="l01963"></a><span class="lineno"> 1963</span>  <span class="comment">// its lower (resp. upper) bound. This is the same as saying that this</span></div><div class="line"><a name="l01964"></a><span class="lineno"> 1964</span>  <span class="comment">// constraint only bound in one direction.</span></div><div class="line"><a name="l01965"></a><span class="lineno"> 1965</span>  <span class="keywordtype">bool</span> is_le_constraint = IsLeConstraint(rhs, implied_rhs);</div><div class="line"><a name="l01966"></a><span class="lineno"> 1966</span>  <span class="keywordtype">bool</span> is_ge_constraint = IsGeConstraint(rhs, implied_rhs);</div><div class="line"><a name="l01967"></a><span class="lineno"> 1967</span> </div><div class="line"><a name="l01968"></a><span class="lineno"> 1968</span>  <span class="comment">// Propagate the variable bounds.</span></div><div class="line"><a name="l01969"></a><span class="lineno"> 1969</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->enforcement_literal().size() > 1) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l01970"></a><span class="lineno"> 1970</span> </div><div class="line"><a name="l01971"></a><span class="lineno"> 1971</span>  <span class="keywordtype">bool</span> new_bounds = <span class="keyword">false</span>;</div><div class="line"><a name="l01972"></a><span class="lineno"> 1972</span>  <span class="keywordtype">bool</span> recanonicalize = <span class="keyword">false</span>;</div><div class="line"><a name="l01973"></a><span class="lineno"> 1973</span>  Domain negated_rhs = rhs.Negation();</div><div class="line"><a name="l01974"></a><span class="lineno"> 1974</span>  Domain right_domain(0);</div><div class="line"><a name="l01975"></a><span class="lineno"> 1975</span>  Domain new_domain;</div><div class="line"><a name="l01976"></a><span class="lineno"> 1976</span>  Domain implied_term_domain;</div><div class="line"><a name="l01977"></a><span class="lineno"> 1977</span>  term_domains[num_vars] = Domain(0);</div><div class="line"><a name="l01978"></a><span class="lineno"> 1978</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = num_vars - 1; i >= 0; --i) {</div><div class="line"><a name="l01979"></a><span class="lineno"> 1979</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().vars(i);</div><div class="line"><a name="l01980"></a><span class="lineno"> 1980</span>  <span class="keyword">const</span> int64_t var_coeff = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().coeffs(i);</div><div class="line"><a name="l01981"></a><span class="lineno"> 1981</span>  right_domain =</div><div class="line"><a name="l01982"></a><span class="lineno"> 1982</span>  right_domain.AdditionWith(term_domains[i + 1]).RelaxIfTooComplex();</div><div class="line"><a name="l01983"></a><span class="lineno"> 1983</span>  implied_term_domain = left_domains[i].AdditionWith(right_domain);</div><div class="line"><a name="l01984"></a><span class="lineno"> 1984</span>  new_domain = implied_term_domain.AdditionWith(negated_rhs)</div><div class="line"><a name="l01985"></a><span class="lineno"> 1985</span>  .InverseMultiplicationBy(-var_coeff);</div><div class="line"><a name="l01986"></a><span class="lineno"> 1986</span> </div><div class="line"><a name="l01987"></a><span class="lineno"> 1987</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->enforcement_literal().empty()) {</div><div class="line"><a name="l01988"></a><span class="lineno"> 1988</span>  <span class="comment">// Push the new domain.</span></div><div class="line"><a name="l01989"></a><span class="lineno"> 1989</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>, new_domain, &new_bounds)) {</div><div class="line"><a name="l01990"></a><span class="lineno"> 1990</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l01991"></a><span class="lineno"> 1991</span>  }</div><div class="line"><a name="l01992"></a><span class="lineno"> 1992</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->enforcement_literal().size() == 1) {</div><div class="line"><a name="l01993"></a><span class="lineno"> 1993</span>  <span class="comment">// We cannot push the new domain, but we can add some deduction.</span></div><div class="line"><a name="l01994"></a><span class="lineno"> 1994</span>  <a class="code" href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a>(<a class="code" href="namespaceoperations__research_1_1sat.html#a217338425de4389014563f1f24331713">RefIsPositive</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>));</div><div class="line"><a name="l01995"></a><span class="lineno"> 1995</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a33f90dcf20e1ce9197e60eb3bed25974">DomainOfVarIsIncludedIn</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>, new_domain)) {</div><div class="line"><a name="l01996"></a><span class="lineno"> 1996</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a6e086436e931cd8b341d85e6889b838d">deductions</a>.<a class="code" href="classoperations__research_1_1sat_1_1_domain_deductions.html#ae69f83e1bf5e9a4e729840d31078cdbd">AddDeduction</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->enforcement_literal(0), <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>,</div><div class="line"><a name="l01997"></a><span class="lineno"> 1997</span>  new_domain);</div><div class="line"><a name="l01998"></a><span class="lineno"> 1998</span>  }</div><div class="line"><a name="l01999"></a><span class="lineno"> 1999</span>  }</div><div class="line"><a name="l02000"></a><span class="lineno"> 2000</span> </div><div class="line"><a name="l02001"></a><span class="lineno"> 2001</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#abb6eb29f56c3a33b8ae1b74b08b755c2">IsFixed</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) {</div><div class="line"><a name="l02002"></a><span class="lineno"> 2002</span>  <span class="comment">// This will make sure we remove that fixed variable from the constraint.</span></div><div class="line"><a name="l02003"></a><span class="lineno"> 2003</span>  recanonicalize = <span class="keyword">true</span>;</div><div class="line"><a name="l02004"></a><span class="lineno"> 2004</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l02005"></a><span class="lineno"> 2005</span>  }</div><div class="line"><a name="l02006"></a><span class="lineno"> 2006</span> </div><div class="line"><a name="l02007"></a><span class="lineno"> 2007</span>  <span class="keywordflow">if</span> (is_le_constraint || is_ge_constraint) {</div><div class="line"><a name="l02008"></a><span class="lineno"> 2008</span>  <a class="code" href="base_2logging_8h.html#ab25e01a2942b821d66371fc68d53f2eb">CHECK_NE</a>(is_le_constraint, is_ge_constraint);</div><div class="line"><a name="l02009"></a><span class="lineno"> 2009</span>  <span class="keywordflow">if</span> ((var_coeff > 0) == is_ge_constraint) {</div><div class="line"><a name="l02010"></a><span class="lineno"> 2010</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a23aa815e8a7a860998c4d35760fa087e">var_to_lb_only_constraints</a>[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>].insert(ct_index);</div><div class="line"><a name="l02011"></a><span class="lineno"> 2011</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l02012"></a><span class="lineno"> 2012</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a47714f887512a3d7acebfcb4a348291a">var_to_ub_only_constraints</a>[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>].insert(ct_index);</div><div class="line"><a name="l02013"></a><span class="lineno"> 2013</span>  }</div><div class="line"><a name="l02014"></a><span class="lineno"> 2014</span> </div><div class="line"><a name="l02015"></a><span class="lineno"> 2015</span>  <span class="comment">// Simple dual fixing: If for any feasible solution, any solution with var</span></div><div class="line"><a name="l02016"></a><span class="lineno"> 2016</span>  <span class="comment">// higher (resp. lower) is also valid, then we can fix that variable to</span></div><div class="line"><a name="l02017"></a><span class="lineno"> 2017</span>  <span class="comment">// its bound if it also moves the objective in the good direction.</span></div><div class="line"><a name="l02018"></a><span class="lineno"> 2018</span>  <span class="comment">//</span></div><div class="line"><a name="l02019"></a><span class="lineno"> 2019</span>  <span class="comment">// A bit tricky. If a linear constraint was detected to not block a</span></div><div class="line"><a name="l02020"></a><span class="lineno"> 2020</span>  <span class="comment">// variable in one direction, this shouldn't change later (expect in the</span></div><div class="line"><a name="l02021"></a><span class="lineno"> 2021</span>  <span class="comment">// tightening code below, and we do take care of it). However variable can</span></div><div class="line"><a name="l02022"></a><span class="lineno"> 2022</span>  <span class="comment">// appear in new constraints.</span></div><div class="line"><a name="l02023"></a><span class="lineno"> 2023</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab7b13b808e3dea6fc1e4006f7134e9f9">keep_all_feasible_solutions</a>) {</div><div class="line"><a name="l02024"></a><span class="lineno"> 2024</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> is_in_objective =</div><div class="line"><a name="l02025"></a><span class="lineno"> 2025</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#acf72cafd3dab9ac4b5e5b1a3aaa75192">VarToConstraints</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>).contains(-1);</div><div class="line"><a name="l02026"></a><span class="lineno"> 2026</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> size =</div><div class="line"><a name="l02027"></a><span class="lineno"> 2027</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#acf72cafd3dab9ac4b5e5b1a3aaa75192">VarToConstraints</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>).size() - (is_in_objective ? 1 : 0);</div><div class="line"><a name="l02028"></a><span class="lineno"> 2028</span>  <span class="keyword">const</span> int64_t obj_coeff =</div><div class="line"><a name="l02029"></a><span class="lineno"> 2029</span>  is_in_objective ? <a class="code" href="namespacegtl.html#abce27d097bc5680207b294bdad75f59f">gtl::FindOrDie</a>(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a66fc178adf4c7e56b3a6f1a5e052d3e5">ObjectiveMap</a>(), <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) : 0;</div><div class="line"><a name="l02030"></a><span class="lineno"> 2030</span> </div><div class="line"><a name="l02031"></a><span class="lineno"> 2031</span>  <span class="comment">// We cannot fix anything if the domain of the objective is excluding</span></div><div class="line"><a name="l02032"></a><span class="lineno"> 2032</span>  <span class="comment">// some objective values.</span></div><div class="line"><a name="l02033"></a><span class="lineno"> 2033</span>  <span class="keywordflow">if</span> (obj_coeff != 0 && context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a483ddc58170919b851be240df84c77af">ObjectiveDomainIsConstraining</a>()) {</div><div class="line"><a name="l02034"></a><span class="lineno"> 2034</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l02035"></a><span class="lineno"> 2035</span>  }</div><div class="line"><a name="l02036"></a><span class="lineno"> 2036</span> </div><div class="line"><a name="l02037"></a><span class="lineno"> 2037</span>  <span class="keywordflow">if</span> (obj_coeff <= 0 &&</div><div class="line"><a name="l02038"></a><span class="lineno"> 2038</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a23aa815e8a7a860998c4d35760fa087e">var_to_lb_only_constraints</a>[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>].size() >= size) {</div><div class="line"><a name="l02039"></a><span class="lineno"> 2039</span>  TakeIntersectionWith(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#acf72cafd3dab9ac4b5e5b1a3aaa75192">VarToConstraints</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>),</div><div class="line"><a name="l02040"></a><span class="lineno"> 2040</span>  &(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a23aa815e8a7a860998c4d35760fa087e">var_to_lb_only_constraints</a>[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>]));</div><div class="line"><a name="l02041"></a><span class="lineno"> 2041</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a23aa815e8a7a860998c4d35760fa087e">var_to_lb_only_constraints</a>[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>].size() >= size) {</div><div class="line"><a name="l02042"></a><span class="lineno"> 2042</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>,</div><div class="line"><a name="l02043"></a><span class="lineno"> 2043</span>  Domain(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a00f995618e00d575372ff823a12553a9">MaxOf</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)))) {</div><div class="line"><a name="l02044"></a><span class="lineno"> 2044</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l02045"></a><span class="lineno"> 2045</span>  }</div><div class="line"><a name="l02046"></a><span class="lineno"> 2046</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"linear: dual fixing"</span>);</div><div class="line"><a name="l02047"></a><span class="lineno"> 2047</span>  recanonicalize = <span class="keyword">true</span>;</div><div class="line"><a name="l02048"></a><span class="lineno"> 2048</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l02049"></a><span class="lineno"> 2049</span>  }</div><div class="line"><a name="l02050"></a><span class="lineno"> 2050</span>  }</div><div class="line"><a name="l02051"></a><span class="lineno"> 2051</span>  <span class="keywordflow">if</span> (obj_coeff >= 0 &&</div><div class="line"><a name="l02052"></a><span class="lineno"> 2052</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a47714f887512a3d7acebfcb4a348291a">var_to_ub_only_constraints</a>[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>].size() >= size) {</div><div class="line"><a name="l02053"></a><span class="lineno"> 2053</span>  TakeIntersectionWith(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#acf72cafd3dab9ac4b5e5b1a3aaa75192">VarToConstraints</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>),</div><div class="line"><a name="l02054"></a><span class="lineno"> 2054</span>  &(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a47714f887512a3d7acebfcb4a348291a">var_to_ub_only_constraints</a>[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>]));</div><div class="line"><a name="l02055"></a><span class="lineno"> 2055</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a47714f887512a3d7acebfcb4a348291a">var_to_ub_only_constraints</a>[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>].size() >= size) {</div><div class="line"><a name="l02056"></a><span class="lineno"> 2056</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>,</div><div class="line"><a name="l02057"></a><span class="lineno"> 2057</span>  Domain(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)))) {</div><div class="line"><a name="l02058"></a><span class="lineno"> 2058</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l02059"></a><span class="lineno"> 2059</span>  }</div><div class="line"><a name="l02060"></a><span class="lineno"> 2060</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"linear: dual fixing"</span>);</div><div class="line"><a name="l02061"></a><span class="lineno"> 2061</span>  recanonicalize = <span class="keyword">true</span>;</div><div class="line"><a name="l02062"></a><span class="lineno"> 2062</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l02063"></a><span class="lineno"> 2063</span>  }</div><div class="line"><a name="l02064"></a><span class="lineno"> 2064</span>  }</div><div class="line"><a name="l02065"></a><span class="lineno"> 2065</span>  }</div><div class="line"><a name="l02066"></a><span class="lineno"> 2066</span>  }</div><div class="line"><a name="l02067"></a><span class="lineno"> 2067</span> </div><div class="line"><a name="l02068"></a><span class="lineno"> 2068</span>  <span class="comment">// The other transformations below require a non-reified constraint.</span></div><div class="line"><a name="l02069"></a><span class="lineno"> 2069</span>  <span class="keywordflow">if</span> (!<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->enforcement_literal().empty()) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l02070"></a><span class="lineno"> 2070</span> </div><div class="line"><a name="l02071"></a><span class="lineno"> 2071</span>  <span class="comment">// Given a variable that only appear in one constraint and in the</span></div><div class="line"><a name="l02072"></a><span class="lineno"> 2072</span>  <span class="comment">// objective, for any feasible solution, it will be always better to move</span></div><div class="line"><a name="l02073"></a><span class="lineno"> 2073</span>  <span class="comment">// this singleton variable as much as possible towards its good objective</span></div><div class="line"><a name="l02074"></a><span class="lineno"> 2074</span>  <span class="comment">// direction. Sometimes, we can detect that we will always be able to do</span></div><div class="line"><a name="l02075"></a><span class="lineno"> 2075</span>  <span class="comment">// this until the only constraint of this singleton variable is tight.</span></div><div class="line"><a name="l02076"></a><span class="lineno"> 2076</span>  <span class="comment">//</span></div><div class="line"><a name="l02077"></a><span class="lineno"> 2077</span>  <span class="comment">// When this happens, we can make the constraint an equality. Note that it</span></div><div class="line"><a name="l02078"></a><span class="lineno"> 2078</span>  <span class="comment">// might not always be good to restrict constraint like this, but in this</span></div><div class="line"><a name="l02079"></a><span class="lineno"> 2079</span>  <span class="comment">// case, the RemoveSingletonInLinear() code should be able to remove this</span></div><div class="line"><a name="l02080"></a><span class="lineno"> 2080</span>  <span class="comment">// variable altogether.</span></div><div class="line"><a name="l02081"></a><span class="lineno"> 2081</span>  <span class="keywordflow">if</span> (rhs.Min() != rhs.Max() &&</div><div class="line"><a name="l02082"></a><span class="lineno"> 2082</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a34e2cd343e0dfb06af9f67df8c4c3502">VariableWithCostIsUniqueAndRemovable</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) {</div><div class="line"><a name="l02083"></a><span class="lineno"> 2083</span>  <span class="keyword">const</span> int64_t obj_coeff = <a class="code" href="namespacegtl.html#abce27d097bc5680207b294bdad75f59f">gtl::FindOrDie</a>(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a66fc178adf4c7e56b3a6f1a5e052d3e5">ObjectiveMap</a>(), <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l02084"></a><span class="lineno"> 2084</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> same_sign = (var_coeff > 0) == (obj_coeff > 0);</div><div class="line"><a name="l02085"></a><span class="lineno"> 2085</span>  <span class="keywordtype">bool</span> fixed = <span class="keyword">false</span>;</div><div class="line"><a name="l02086"></a><span class="lineno"> 2086</span>  <span class="keywordflow">if</span> (same_sign && RhsCanBeFixedToMin(var_coeff, context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>),</div><div class="line"><a name="l02087"></a><span class="lineno"> 2087</span>  implied_term_domain, rhs)) {</div><div class="line"><a name="l02088"></a><span class="lineno"> 2088</span>  rhs = Domain(rhs.Min());</div><div class="line"><a name="l02089"></a><span class="lineno"> 2089</span>  fixed = <span class="keyword">true</span>;</div><div class="line"><a name="l02090"></a><span class="lineno"> 2090</span>  }</div><div class="line"><a name="l02091"></a><span class="lineno"> 2091</span>  <span class="keywordflow">if</span> (!same_sign && RhsCanBeFixedToMax(var_coeff, context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>),</div><div class="line"><a name="l02092"></a><span class="lineno"> 2092</span>  implied_term_domain, rhs)) {</div><div class="line"><a name="l02093"></a><span class="lineno"> 2093</span>  rhs = Domain(rhs.Max());</div><div class="line"><a name="l02094"></a><span class="lineno"> 2094</span>  fixed = <span class="keyword">true</span>;</div><div class="line"><a name="l02095"></a><span class="lineno"> 2095</span>  }</div><div class="line"><a name="l02096"></a><span class="lineno"> 2096</span>  <span class="keywordflow">if</span> (fixed) {</div><div class="line"><a name="l02097"></a><span class="lineno"> 2097</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"linear: tightened into equality"</span>);</div><div class="line"><a name="l02098"></a><span class="lineno"> 2098</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a901c19b12842f8af153e588a689a90b5">FillDomainInProto</a>(rhs, <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_linear());</div><div class="line"><a name="l02099"></a><span class="lineno"> 2099</span>  negated_rhs = rhs.Negation();</div><div class="line"><a name="l02100"></a><span class="lineno"> 2100</span> </div><div class="line"><a name="l02101"></a><span class="lineno"> 2101</span>  <span class="comment">// Restart the loop.</span></div><div class="line"><a name="l02102"></a><span class="lineno"> 2102</span>  i = num_vars;</div><div class="line"><a name="l02103"></a><span class="lineno"> 2103</span>  right_domain = Domain(0);</div><div class="line"><a name="l02104"></a><span class="lineno"> 2104</span> </div><div class="line"><a name="l02105"></a><span class="lineno"> 2105</span>  <span class="comment">// An equality is a >= (or <=) constraint iff all its term are fixed.</span></div><div class="line"><a name="l02106"></a><span class="lineno"> 2106</span>  <span class="comment">// Since we restart the loop, we will detect that.</span></div><div class="line"><a name="l02107"></a><span class="lineno"> 2107</span>  is_le_constraint = <span class="keyword">false</span>;</div><div class="line"><a name="l02108"></a><span class="lineno"> 2108</span>  is_ge_constraint = <span class="keyword">false</span>;</div><div class="line"><a name="l02109"></a><span class="lineno"> 2109</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().vars()) {</div><div class="line"><a name="l02110"></a><span class="lineno"> 2110</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a23aa815e8a7a860998c4d35760fa087e">var_to_lb_only_constraints</a>[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>].erase(ct_index);</div><div class="line"><a name="l02111"></a><span class="lineno"> 2111</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a47714f887512a3d7acebfcb4a348291a">var_to_ub_only_constraints</a>[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>].erase(ct_index);</div><div class="line"><a name="l02112"></a><span class="lineno"> 2112</span>  }</div><div class="line"><a name="l02113"></a><span class="lineno"> 2113</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l02114"></a><span class="lineno"> 2114</span>  }</div><div class="line"><a name="l02115"></a><span class="lineno"> 2115</span>  }</div><div class="line"><a name="l02116"></a><span class="lineno"> 2116</span> </div><div class="line"><a name="l02117"></a><span class="lineno"> 2117</span>  <span class="comment">// Can we perform some substitution?</span></div><div class="line"><a name="l02118"></a><span class="lineno"> 2118</span>  <span class="comment">//</span></div><div class="line"><a name="l02119"></a><span class="lineno"> 2119</span>  <span class="comment">// TODO(user): there is no guarantee we will not miss some since we might</span></div><div class="line"><a name="l02120"></a><span class="lineno"> 2120</span>  <span class="comment">// not reprocess a constraint once other have been deleted.</span></div><div class="line"><a name="l02121"></a><span class="lineno"> 2121</span> </div><div class="line"><a name="l02122"></a><span class="lineno"> 2122</span>  <span class="comment">// Skip affine constraint. It is more efficient to substitute them lazily</span></div><div class="line"><a name="l02123"></a><span class="lineno"> 2123</span>  <span class="comment">// when we process other constraints. Note that if we relax the fact that</span></div><div class="line"><a name="l02124"></a><span class="lineno"> 2124</span>  <span class="comment">// we substitute only equalities, we can deal with inequality of size 2</span></div><div class="line"><a name="l02125"></a><span class="lineno"> 2125</span>  <span class="comment">// here.</span></div><div class="line"><a name="l02126"></a><span class="lineno"> 2126</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().vars().size() <= 2) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l02127"></a><span class="lineno"> 2127</span> </div><div class="line"><a name="l02128"></a><span class="lineno"> 2128</span>  <span class="comment">// TODO(user): We actually do not need a strict equality when</span></div><div class="line"><a name="l02129"></a><span class="lineno"> 2129</span>  <span class="comment">// keep_all_feasible_solutions is false, but that simplifies things as the</span></div><div class="line"><a name="l02130"></a><span class="lineno"> 2130</span>  <span class="comment">// SubstituteVariable() function cannot fail this way.</span></div><div class="line"><a name="l02131"></a><span class="lineno"> 2131</span>  <span class="keywordflow">if</span> (rhs.Min() != rhs.Max()) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l02132"></a><span class="lineno"> 2132</span> </div><div class="line"><a name="l02133"></a><span class="lineno"> 2133</span>  <span class="comment">// Only consider "implied free" variables. Note that the coefficient of</span></div><div class="line"><a name="l02134"></a><span class="lineno"> 2134</span>  <span class="comment">// magnitude 1 is important otherwise we can't easily remove the</span></div><div class="line"><a name="l02135"></a><span class="lineno"> 2135</span>  <span class="comment">// constraint since the fact that the sum of the other terms must be a</span></div><div class="line"><a name="l02136"></a><span class="lineno"> 2136</span>  <span class="comment">// multiple of coeff will not be enforced anymore.</span></div><div class="line"><a name="l02137"></a><span class="lineno"> 2137</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) != new_domain) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l02138"></a><span class="lineno"> 2138</span>  <span class="keywordflow">if</span> (std::abs(var_coeff) != 1) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l02139"></a><span class="lineno"> 2139</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aaabb604ccac4a6136be93bfe64e2290d">params</a>().<a class="code" href="classoperations__research_1_1sat_1_1_sat_parameters.html#a5afd677f3a39bcbd094567bae53c36b4">presolve_substitution_level</a>() <= 0) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l02140"></a><span class="lineno"> 2140</span> </div><div class="line"><a name="l02141"></a><span class="lineno"> 2141</span>  <span class="comment">// NOTE: The mapping doesn't allow us to remove a variable if</span></div><div class="line"><a name="l02142"></a><span class="lineno"> 2142</span>  <span class="comment">// 'keep_all_feasible_solutions' is true.</span></div><div class="line"><a name="l02143"></a><span class="lineno"> 2143</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab7b13b808e3dea6fc1e4006f7134e9f9">keep_all_feasible_solutions</a>) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l02144"></a><span class="lineno"> 2144</span> </div><div class="line"><a name="l02145"></a><span class="lineno"> 2145</span>  <span class="keywordtype">bool</span> is_in_objective = <span class="keyword">false</span>;</div><div class="line"><a name="l02146"></a><span class="lineno"> 2146</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#acf72cafd3dab9ac4b5e5b1a3aaa75192">VarToConstraints</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>).contains(-1)) {</div><div class="line"><a name="l02147"></a><span class="lineno"> 2147</span>  is_in_objective = <span class="keyword">true</span>;</div><div class="line"><a name="l02148"></a><span class="lineno"> 2148</span>  <a class="code" href="base_2logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a>(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a66fc178adf4c7e56b3a6f1a5e052d3e5">ObjectiveMap</a>().contains(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>));</div><div class="line"><a name="l02149"></a><span class="lineno"> 2149</span>  }</div><div class="line"><a name="l02150"></a><span class="lineno"> 2150</span> </div><div class="line"><a name="l02151"></a><span class="lineno"> 2151</span>  <span class="comment">// Only consider low degree columns.</span></div><div class="line"><a name="l02152"></a><span class="lineno"> 2152</span>  <span class="keywordtype">int</span> col_size = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#acf72cafd3dab9ac4b5e5b1a3aaa75192">VarToConstraints</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>).size();</div><div class="line"><a name="l02153"></a><span class="lineno"> 2153</span>  <span class="keywordflow">if</span> (is_in_objective) col_size--;</div><div class="line"><a name="l02154"></a><span class="lineno"> 2154</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> row_size = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().vars_size();</div><div class="line"><a name="l02155"></a><span class="lineno"> 2155</span> </div><div class="line"><a name="l02156"></a><span class="lineno"> 2156</span>  <span class="comment">// This is actually an upper bound on the number of entries added since</span></div><div class="line"><a name="l02157"></a><span class="lineno"> 2157</span>  <span class="comment">// some of them might already be present.</span></div><div class="line"><a name="l02158"></a><span class="lineno"> 2158</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> num_entries_added = (row_size - 1) * (col_size - 1);</div><div class="line"><a name="l02159"></a><span class="lineno"> 2159</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> num_entries_removed = col_size + row_size - 1;</div><div class="line"><a name="l02160"></a><span class="lineno"> 2160</span> </div><div class="line"><a name="l02161"></a><span class="lineno"> 2161</span>  <span class="keywordflow">if</span> (num_entries_added > num_entries_removed) {</div><div class="line"><a name="l02162"></a><span class="lineno"> 2162</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l02163"></a><span class="lineno"> 2163</span>  }</div><div class="line"><a name="l02164"></a><span class="lineno"> 2164</span> </div><div class="line"><a name="l02165"></a><span class="lineno"> 2165</span>  <span class="comment">// Check pre-conditions on all the constraints in which this variable</span></div><div class="line"><a name="l02166"></a><span class="lineno"> 2166</span>  <span class="comment">// appear. Basically they must all be linear.</span></div><div class="line"><a name="l02167"></a><span class="lineno"> 2167</span>  std::vector<int> others;</div><div class="line"><a name="l02168"></a><span class="lineno"> 2168</span>  <span class="keywordtype">bool</span> abort = <span class="keyword">false</span>;</div><div class="line"><a name="l02169"></a><span class="lineno"> 2169</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> c : context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#acf72cafd3dab9ac4b5e5b1a3aaa75192">VarToConstraints</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) {</div><div class="line"><a name="l02170"></a><span class="lineno"> 2170</span>  <span class="keywordflow">if</span> (c == <a class="code" href="namespaceoperations__research_1_1sat.html#aca25bc3ffa54b3f2668c6eeddffd8d1d">kObjectiveConstraint</a>) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l02171"></a><span class="lineno"> 2171</span>  <span class="keywordflow">if</span> (c == <a class="code" href="namespaceoperations__research_1_1sat.html#a55963ffe87280b37dce97b9a8cbd03ae">kAffineRelationConstraint</a>) {</div><div class="line"><a name="l02172"></a><span class="lineno"> 2172</span>  abort = <span class="keyword">true</span>;</div><div class="line"><a name="l02173"></a><span class="lineno"> 2173</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l02174"></a><span class="lineno"> 2174</span>  }</div><div class="line"><a name="l02175"></a><span class="lineno"> 2175</span>  <span class="keywordflow">if</span> (c == ct_index) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l02176"></a><span class="lineno"> 2176</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#afce66afa8ae7776a449bba7313ea3559">constraints</a>(c).<a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a5f9869899e2c94786f9709684f1ecc56">constraint_case</a>() !=</div><div class="line"><a name="l02177"></a><span class="lineno"> 2177</span>  ConstraintProto::ConstraintCase::kLinear) {</div><div class="line"><a name="l02178"></a><span class="lineno"> 2178</span>  abort = <span class="keyword">true</span>;</div><div class="line"><a name="l02179"></a><span class="lineno"> 2179</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l02180"></a><span class="lineno"> 2180</span>  }</div><div class="line"><a name="l02181"></a><span class="lineno"> 2181</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> ref :</div><div class="line"><a name="l02182"></a><span class="lineno"> 2182</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#afce66afa8ae7776a449bba7313ea3559">constraints</a>(c).<a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#acdc90a25e531e4180c495f4ecf2aca2e">enforcement_literal</a>()) {</div><div class="line"><a name="l02183"></a><span class="lineno"> 2183</span>  <span class="keywordflow">if</span> (<a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(ref) == <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) {</div><div class="line"><a name="l02184"></a><span class="lineno"> 2184</span>  abort = <span class="keyword">true</span>;</div><div class="line"><a name="l02185"></a><span class="lineno"> 2185</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l02186"></a><span class="lineno"> 2186</span>  }</div><div class="line"><a name="l02187"></a><span class="lineno"> 2187</span>  }</div><div class="line"><a name="l02188"></a><span class="lineno"> 2188</span>  others.push_back(c);</div><div class="line"><a name="l02189"></a><span class="lineno"> 2189</span>  }</div><div class="line"><a name="l02190"></a><span class="lineno"> 2190</span>  <span class="keywordflow">if</span> (abort) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l02191"></a><span class="lineno"> 2191</span> </div><div class="line"><a name="l02192"></a><span class="lineno"> 2192</span>  <span class="comment">// Do the actual substitution.</span></div><div class="line"><a name="l02193"></a><span class="lineno"> 2193</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> c : others) {</div><div class="line"><a name="l02194"></a><span class="lineno"> 2194</span>  <span class="comment">// TODO(user): In some corner cases, this might create integer overflow</span></div><div class="line"><a name="l02195"></a><span class="lineno"> 2195</span>  <span class="comment">// issues. The danger is limited since the range of the linear</span></div><div class="line"><a name="l02196"></a><span class="lineno"> 2196</span>  <span class="comment">// expression used in the definition do not exceed the domain of the</span></div><div class="line"><a name="l02197"></a><span class="lineno"> 2197</span>  <span class="comment">// variable we substitute.</span></div><div class="line"><a name="l02198"></a><span class="lineno"> 2198</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a62adf82ba94a3431e4e547a563f06d81">SubstituteVariable</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>, var_coeff, *<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>,</div><div class="line"><a name="l02199"></a><span class="lineno"> 2199</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a9b3e1bc8b76ea7d2614fd7ec2b066039">mutable_constraints</a>(c));</div><div class="line"><a name="l02200"></a><span class="lineno"> 2200</span> </div><div class="line"><a name="l02201"></a><span class="lineno"> 2201</span>  <span class="comment">// TODO(user): We should re-enqueue these constraints for presolve.</span></div><div class="line"><a name="l02202"></a><span class="lineno"> 2202</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab75a27c0aeda2de9c3957719b8196c36">UpdateConstraintVariableUsage</a>(c);</div><div class="line"><a name="l02203"></a><span class="lineno"> 2203</span>  }</div><div class="line"><a name="l02204"></a><span class="lineno"> 2204</span> </div><div class="line"><a name="l02205"></a><span class="lineno"> 2205</span>  <span class="comment">// Substitute in objective.</span></div><div class="line"><a name="l02206"></a><span class="lineno"> 2206</span>  <span class="comment">// This can only fail in corner cases.</span></div><div class="line"><a name="l02207"></a><span class="lineno"> 2207</span>  <span class="keywordflow">if</span> (is_in_objective &&</div><div class="line"><a name="l02208"></a><span class="lineno"> 2208</span>  !context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a4bf47c6b5724e9a3a7df78486f9bdc41">SubstituteVariableInObjective</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>, var_coeff, *<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) {</div><div class="line"><a name="l02209"></a><span class="lineno"> 2209</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l02210"></a><span class="lineno"> 2210</span>  }</div><div class="line"><a name="l02211"></a><span class="lineno"> 2211</span> </div><div class="line"><a name="l02212"></a><span class="lineno"> 2212</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(</div><div class="line"><a name="l02213"></a><span class="lineno"> 2213</span>  absl::StrCat(<span class="stringliteral">"linear: variable substitution "</span>, others.size()));</div><div class="line"><a name="l02214"></a><span class="lineno"> 2214</span> </div><div class="line"><a name="l02215"></a><span class="lineno"> 2215</span>  <span class="comment">// The variable now only appear in its definition and we can remove it</span></div><div class="line"><a name="l02216"></a><span class="lineno"> 2216</span>  <span class="comment">// because it was implied free.</span></div><div class="line"><a name="l02217"></a><span class="lineno"> 2217</span>  <span class="comment">//</span></div><div class="line"><a name="l02218"></a><span class="lineno"> 2218</span>  <span class="comment">// Tricky: If the linear constraint contains other variables that are only</span></div><div class="line"><a name="l02219"></a><span class="lineno"> 2219</span>  <span class="comment">// used here, then the postsolve needs more info. We do need to indicate</span></div><div class="line"><a name="l02220"></a><span class="lineno"> 2220</span>  <span class="comment">// that whatever the value of those other variables, we will have a way to</span></div><div class="line"><a name="l02221"></a><span class="lineno"> 2221</span>  <span class="comment">// assign var. We do that by putting it fist.</span></div><div class="line"><a name="l02222"></a><span class="lineno"> 2222</span>  <a class="code" href="base_2logging_8h.html#a7c0ce053b28d53aa4eaf3eb7fb71663b">CHECK_EQ</a>(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#acf72cafd3dab9ac4b5e5b1a3aaa75192">VarToConstraints</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>).size(), 1);</div><div class="line"><a name="l02223"></a><span class="lineno"> 2223</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a6939dc7b9db01cf3deff10405e260461">MarkVariableAsRemoved</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l02224"></a><span class="lineno"> 2224</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> ct_index = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a4b3b9ef9c5f214dd4427daa2646eceda">mapping_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#afce66afa8ae7776a449bba7313ea3559">constraints</a>().size();</div><div class="line"><a name="l02225"></a><span class="lineno"> 2225</span>  *context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a4b3b9ef9c5f214dd4427daa2646eceda">mapping_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>() = *<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>;</div><div class="line"><a name="l02226"></a><span class="lineno"> 2226</span>  LinearConstraintProto* mapping_linear_ct =</div><div class="line"><a name="l02227"></a><span class="lineno"> 2227</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a4b3b9ef9c5f214dd4427daa2646eceda">mapping_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a9b3e1bc8b76ea7d2614fd7ec2b066039">mutable_constraints</a>(ct_index)</div><div class="line"><a name="l02228"></a><span class="lineno"> 2228</span>  -><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ad653c55b371ae98444295965c6622ddb">mutable_linear</a>();</div><div class="line"><a name="l02229"></a><span class="lineno"> 2229</span>  <a class="code" href="namespaceoperations__research_1_1math__opt.html#a5de89a1f6e3f80a49a0d76136d8044e2">std::swap</a>(mapping_linear_ct->mutable_vars()->at(0),</div><div class="line"><a name="l02230"></a><span class="lineno"> 2230</span>  mapping_linear_ct->mutable_vars()->at(i));</div><div class="line"><a name="l02231"></a><span class="lineno"> 2231</span>  <a class="code" href="namespaceoperations__research_1_1math__opt.html#a5de89a1f6e3f80a49a0d76136d8044e2">std::swap</a>(mapping_linear_ct->mutable_coeffs()->at(0),</div><div class="line"><a name="l02232"></a><span class="lineno"> 2232</span>  mapping_linear_ct->mutable_coeffs()->at(i));</div><div class="line"><a name="l02233"></a><span class="lineno"> 2233</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l02234"></a><span class="lineno"> 2234</span>  }</div><div class="line"><a name="l02235"></a><span class="lineno"> 2235</span>  <span class="keywordflow">if</span> (new_bounds) {</div><div class="line"><a name="l02236"></a><span class="lineno"> 2236</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"linear: reduced variable domains"</span>);</div><div class="line"><a name="l02237"></a><span class="lineno"> 2237</span>  }</div><div class="line"><a name="l02238"></a><span class="lineno"> 2238</span>  <span class="keywordflow">if</span> (recanonicalize) <span class="keywordflow">return</span> CanonicalizeLinear(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l02239"></a><span class="lineno"> 2239</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l02240"></a><span class="lineno"> 2240</span> }</div><div class="line"><a name="l02241"></a><span class="lineno"> 2241</span> </div><div class="line"><a name="l02242"></a><span class="lineno"> 2242</span> <span class="comment">// Identify Boolean variable that makes the constraint always true when set to</span></div><div class="line"><a name="l02243"></a><span class="lineno"> 2243</span> <span class="comment">// true or false. Moves such literal to the constraint enforcement literals</span></div><div class="line"><a name="l02244"></a><span class="lineno"> 2244</span> <span class="comment">// list.</span></div><div class="line"><a name="l02245"></a><span class="lineno"> 2245</span> <span class="comment">//</span></div><div class="line"><a name="l02246"></a><span class="lineno"> 2246</span> <span class="comment">// We also generalize this to integer variable at one of their bound.</span></div><div class="line"><a name="l02247"></a><span class="lineno"> 2247</span> <span class="comment">//</span></div><div class="line"><a name="l02248"></a><span class="lineno"> 2248</span> <span class="comment">// This operation is similar to coefficient strengthening in the MIP world.</span></div><div class="line"><a name="l02249"></a><span class="lineno"> 2249</span> <span class="keywordtype">void</span> CpModelPresolver::ExtractEnforcementLiteralFromLinearConstraint(</div><div class="line"><a name="l02250"></a><span class="lineno"> 2250</span>  <span class="keywordtype">int</span> ct_index, ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l02251"></a><span class="lineno"> 2251</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->constraint_case() != ConstraintProto::ConstraintCase::kLinear ||</div><div class="line"><a name="l02252"></a><span class="lineno"> 2252</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) {</div><div class="line"><a name="l02253"></a><span class="lineno"> 2253</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l02254"></a><span class="lineno"> 2254</span>  }</div><div class="line"><a name="l02255"></a><span class="lineno"> 2255</span> </div><div class="line"><a name="l02256"></a><span class="lineno"> 2256</span>  <span class="keyword">const</span> LinearConstraintProto& arg = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear();</div><div class="line"><a name="l02257"></a><span class="lineno"> 2257</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> num_vars = arg.vars_size();</div><div class="line"><a name="l02258"></a><span class="lineno"> 2258</span> </div><div class="line"><a name="l02259"></a><span class="lineno"> 2259</span>  <span class="comment">// No need to process size one constraints, they will be presolved separately.</span></div><div class="line"><a name="l02260"></a><span class="lineno"> 2260</span>  <span class="comment">// We also do not want to split them in two.</span></div><div class="line"><a name="l02261"></a><span class="lineno"> 2261</span>  <span class="keywordflow">if</span> (num_vars <= 1) <span class="keywordflow">return</span>;</div><div class="line"><a name="l02262"></a><span class="lineno"> 2262</span> </div><div class="line"><a name="l02263"></a><span class="lineno"> 2263</span>  int64_t min_sum = 0;</div><div class="line"><a name="l02264"></a><span class="lineno"> 2264</span>  int64_t max_sum = 0;</div><div class="line"><a name="l02265"></a><span class="lineno"> 2265</span>  int64_t max_coeff_magnitude = 0;</div><div class="line"><a name="l02266"></a><span class="lineno"> 2266</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num_vars; ++i) {</div><div class="line"><a name="l02267"></a><span class="lineno"> 2267</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> ref = arg.vars(i);</div><div class="line"><a name="l02268"></a><span class="lineno"> 2268</span>  <span class="keyword">const</span> int64_t coeff = arg.coeffs(i);</div><div class="line"><a name="l02269"></a><span class="lineno"> 2269</span>  <span class="keyword">const</span> int64_t term_a = coeff * context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(ref);</div><div class="line"><a name="l02270"></a><span class="lineno"> 2270</span>  <span class="keyword">const</span> int64_t term_b = coeff * context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a00f995618e00d575372ff823a12553a9">MaxOf</a>(ref);</div><div class="line"><a name="l02271"></a><span class="lineno"> 2271</span>  max_coeff_magnitude = <a class="code" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::max</a>(max_coeff_magnitude, std::abs(coeff));</div><div class="line"><a name="l02272"></a><span class="lineno"> 2272</span>  min_sum += <a class="code" href="alldiff__cst_8cc.html#ad10edae0a852d72fb76afb1c77735045">std::min</a>(term_a, term_b);</div><div class="line"><a name="l02273"></a><span class="lineno"> 2273</span>  max_sum += <a class="code" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::max</a>(term_a, term_b);</div><div class="line"><a name="l02274"></a><span class="lineno"> 2274</span>  }</div><div class="line"><a name="l02275"></a><span class="lineno"> 2275</span> </div><div class="line"><a name="l02276"></a><span class="lineno"> 2276</span>  <span class="comment">// We can only extract enforcement literals if the maximum coefficient</span></div><div class="line"><a name="l02277"></a><span class="lineno"> 2277</span>  <span class="comment">// magnitude is large enough. Note that we handle complex domain.</span></div><div class="line"><a name="l02278"></a><span class="lineno"> 2278</span>  <span class="comment">//</span></div><div class="line"><a name="l02279"></a><span class="lineno"> 2279</span>  <span class="comment">// TODO(user): Depending on how we split below, the threshold are not the</span></div><div class="line"><a name="l02280"></a><span class="lineno"> 2280</span>  <span class="comment">// same. This is maybe not too important, we just don't split as often as we</span></div><div class="line"><a name="l02281"></a><span class="lineno"> 2281</span>  <span class="comment">// could, but it is still unclear if splitting is good.</span></div><div class="line"><a name="l02282"></a><span class="lineno"> 2282</span>  <span class="keyword">const</span> <span class="keyword">auto</span>& domain = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().domain();</div><div class="line"><a name="l02283"></a><span class="lineno"> 2283</span>  <span class="keyword">const</span> int64_t ub_threshold = domain[domain.size() - 2] - min_sum;</div><div class="line"><a name="l02284"></a><span class="lineno"> 2284</span>  <span class="keyword">const</span> int64_t lb_threshold = max_sum - domain[1];</div><div class="line"><a name="l02285"></a><span class="lineno"> 2285</span>  <span class="keyword">const</span> Domain rhs_domain = <a class="code" href="namespaceoperations__research_1_1sat.html#ab1240060466ba48a36a4b36379bce26a">ReadDomainFromProto</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear());</div><div class="line"><a name="l02286"></a><span class="lineno"> 2286</span>  <span class="keywordflow">if</span> (max_coeff_magnitude < <a class="code" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::max</a>(ub_threshold, lb_threshold)) <span class="keywordflow">return</span>;</div><div class="line"><a name="l02287"></a><span class="lineno"> 2287</span> </div><div class="line"><a name="l02288"></a><span class="lineno"> 2288</span>  <span class="comment">// We need the constraint to be only bounded on one side in order to extract</span></div><div class="line"><a name="l02289"></a><span class="lineno"> 2289</span>  <span class="comment">// enforcement literal.</span></div><div class="line"><a name="l02290"></a><span class="lineno"> 2290</span>  <span class="comment">//</span></div><div class="line"><a name="l02291"></a><span class="lineno"> 2291</span>  <span class="comment">// If it is boxed and we know that some coefficient are big enough (see test</span></div><div class="line"><a name="l02292"></a><span class="lineno"> 2292</span>  <span class="comment">// above), then we split the constraint in two. That might not seems always</span></div><div class="line"><a name="l02293"></a><span class="lineno"> 2293</span>  <span class="comment">// good, but for the CP propagation engine, we don't loose anything by doing</span></div><div class="line"><a name="l02294"></a><span class="lineno"> 2294</span>  <span class="comment">// so, and for the LP we will regroup the constraints if they still have the</span></div><div class="line"><a name="l02295"></a><span class="lineno"> 2295</span>  <span class="comment">// exact same coeff after the presolve.</span></div><div class="line"><a name="l02296"></a><span class="lineno"> 2296</span>  <span class="comment">//</span></div><div class="line"><a name="l02297"></a><span class="lineno"> 2297</span>  <span class="comment">// TODO(user): Creating two new constraints and removing the current one might</span></div><div class="line"><a name="l02298"></a><span class="lineno"> 2298</span>  <span class="comment">// not be the most efficient, but it simplify the presolve code by not having</span></div><div class="line"><a name="l02299"></a><span class="lineno"> 2299</span>  <span class="comment">// to do anything special to trigger a new presolving of these constraints.</span></div><div class="line"><a name="l02300"></a><span class="lineno"> 2300</span>  <span class="comment">// Try to improve if this becomes a problem.</span></div><div class="line"><a name="l02301"></a><span class="lineno"> 2301</span>  <span class="comment">//</span></div><div class="line"><a name="l02302"></a><span class="lineno"> 2302</span>  <span class="comment">// TODO(user): At the end of the presolve we should probably remerge any</span></div><div class="line"><a name="l02303"></a><span class="lineno"> 2303</span>  <span class="comment">// identical linear constraints. That also cover the corner cases where</span></div><div class="line"><a name="l02304"></a><span class="lineno"> 2304</span>  <span class="comment">// constraints are just redundant...</span></div><div class="line"><a name="l02305"></a><span class="lineno"> 2305</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> lower_bounded = min_sum < rhs_domain.<a class="code" href="classoperations__research_1_1_domain.html#a8cf21a67f7d81a800ff912239bb2db64">Min</a>();</div><div class="line"><a name="l02306"></a><span class="lineno"> 2306</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> upper_bounded = max_sum > rhs_domain.Max();</div><div class="line"><a name="l02307"></a><span class="lineno"> 2307</span>  <span class="keywordflow">if</span> (!lower_bounded && !upper_bounded) <span class="keywordflow">return</span>;</div><div class="line"><a name="l02308"></a><span class="lineno"> 2308</span>  <span class="keywordflow">if</span> (lower_bounded && upper_bounded) {</div><div class="line"><a name="l02309"></a><span class="lineno"> 2309</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"linear: split boxed constraint"</span>);</div><div class="line"><a name="l02310"></a><span class="lineno"> 2310</span>  ConstraintProto* new_ct1 = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>();</div><div class="line"><a name="l02311"></a><span class="lineno"> 2311</span>  *new_ct1 = *<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>;</div><div class="line"><a name="l02312"></a><span class="lineno"> 2312</span>  <span class="keywordflow">if</span> (!<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->name().empty()) {</div><div class="line"><a name="l02313"></a><span class="lineno"> 2313</span>  new_ct1->set_name(absl::StrCat(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->name(), <span class="stringliteral">" (part 1)"</span>));</div><div class="line"><a name="l02314"></a><span class="lineno"> 2314</span>  }</div><div class="line"><a name="l02315"></a><span class="lineno"> 2315</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a901c19b12842f8af153e588a689a90b5">FillDomainInProto</a>(Domain(min_sum, rhs_domain.Max()),</div><div class="line"><a name="l02316"></a><span class="lineno"> 2316</span>  new_ct1->mutable_linear());</div><div class="line"><a name="l02317"></a><span class="lineno"> 2317</span> </div><div class="line"><a name="l02318"></a><span class="lineno"> 2318</span>  ConstraintProto* new_ct2 = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>();</div><div class="line"><a name="l02319"></a><span class="lineno"> 2319</span>  *new_ct2 = *<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>;</div><div class="line"><a name="l02320"></a><span class="lineno"> 2320</span>  <span class="keywordflow">if</span> (!<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->name().empty()) {</div><div class="line"><a name="l02321"></a><span class="lineno"> 2321</span>  new_ct2->set_name(absl::StrCat(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->name(), <span class="stringliteral">" (part 2)"</span>));</div><div class="line"><a name="l02322"></a><span class="lineno"> 2322</span>  }</div><div class="line"><a name="l02323"></a><span class="lineno"> 2323</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a901c19b12842f8af153e588a689a90b5">FillDomainInProto</a>(rhs_domain.UnionWith(Domain(rhs_domain.Max(), max_sum)),</div><div class="line"><a name="l02324"></a><span class="lineno"> 2324</span>  new_ct2->mutable_linear());</div><div class="line"><a name="l02325"></a><span class="lineno"> 2325</span> </div><div class="line"><a name="l02326"></a><span class="lineno"> 2326</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l02327"></a><span class="lineno"> 2327</span>  <span class="keywordflow">return</span> (<span class="keywordtype">void</span>)RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l02328"></a><span class="lineno"> 2328</span>  }</div><div class="line"><a name="l02329"></a><span class="lineno"> 2329</span> </div><div class="line"><a name="l02330"></a><span class="lineno"> 2330</span>  <span class="comment">// Any coefficient greater than this will cause the constraint to be trivially</span></div><div class="line"><a name="l02331"></a><span class="lineno"> 2331</span>  <span class="comment">// satisfied when the variable move away from its bound. Note that as we</span></div><div class="line"><a name="l02332"></a><span class="lineno"> 2332</span>  <span class="comment">// remove coefficient, the threshold do not change!</span></div><div class="line"><a name="l02333"></a><span class="lineno"> 2333</span>  <span class="keyword">const</span> int64_t threshold = lower_bounded ? ub_threshold : lb_threshold;</div><div class="line"><a name="l02334"></a><span class="lineno"> 2334</span> </div><div class="line"><a name="l02335"></a><span class="lineno"> 2335</span>  <span class="comment">// Do we only extract Booleans?</span></div><div class="line"><a name="l02336"></a><span class="lineno"> 2336</span>  <span class="comment">//</span></div><div class="line"><a name="l02337"></a><span class="lineno"> 2337</span>  <span class="comment">// Note that for now the default is false, and also there are problem calling</span></div><div class="line"><a name="l02338"></a><span class="lineno"> 2338</span>  <span class="comment">// GetOrCreateVarValueEncoding() after expansion because we might have removed</span></div><div class="line"><a name="l02339"></a><span class="lineno"> 2339</span>  <span class="comment">// the variable used in the encoding.</span></div><div class="line"><a name="l02340"></a><span class="lineno"> 2340</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> only_booleans =</div><div class="line"><a name="l02341"></a><span class="lineno"> 2341</span>  !context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aaabb604ccac4a6136be93bfe64e2290d">params</a>().<a class="code" href="classoperations__research_1_1sat_1_1_sat_parameters.html#ab4544ee81af6dca0dd86bc91c7634dba">presolve_extract_integer_enforcement</a>() ||</div><div class="line"><a name="l02342"></a><span class="lineno"> 2342</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a13c8d5cf71bf7735663c489f5493d036">ModelIsExpanded</a>();</div><div class="line"><a name="l02343"></a><span class="lineno"> 2343</span> </div><div class="line"><a name="l02344"></a><span class="lineno"> 2344</span>  <span class="comment">// To avoid a quadratic loop, we will rewrite the linear expression at the</span></div><div class="line"><a name="l02345"></a><span class="lineno"> 2345</span>  <span class="comment">// same time as we extract enforcement literals.</span></div><div class="line"><a name="l02346"></a><span class="lineno"> 2346</span>  <span class="keywordtype">int</span> new_size = 0;</div><div class="line"><a name="l02347"></a><span class="lineno"> 2347</span>  int64_t rhs_offset = 0;</div><div class="line"><a name="l02348"></a><span class="lineno"> 2348</span>  <span class="keywordtype">bool</span> some_integer_encoding_were_extracted = <span class="keyword">false</span>;</div><div class="line"><a name="l02349"></a><span class="lineno"> 2349</span>  LinearConstraintProto* mutable_arg = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_linear();</div><div class="line"><a name="l02350"></a><span class="lineno"> 2350</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < arg.vars_size(); ++i) {</div><div class="line"><a name="l02351"></a><span class="lineno"> 2351</span>  <span class="keywordtype">int</span> ref = arg.vars(i);</div><div class="line"><a name="l02352"></a><span class="lineno"> 2352</span>  int64_t coeff = arg.coeffs(i);</div><div class="line"><a name="l02353"></a><span class="lineno"> 2353</span>  <span class="keywordflow">if</span> (coeff < 0) {</div><div class="line"><a name="l02354"></a><span class="lineno"> 2354</span>  ref = <a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(ref);</div><div class="line"><a name="l02355"></a><span class="lineno"> 2355</span>  coeff = -coeff;</div><div class="line"><a name="l02356"></a><span class="lineno"> 2356</span>  }</div><div class="line"><a name="l02357"></a><span class="lineno"> 2357</span> </div><div class="line"><a name="l02358"></a><span class="lineno"> 2358</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> is_boolean = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af188bac2776d4545aab9405f5c801cd8">CanBeUsedAsLiteral</a>(ref);</div><div class="line"><a name="l02359"></a><span class="lineno"> 2359</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#abb6eb29f56c3a33b8ae1b74b08b755c2">IsFixed</a>(ref) || coeff < threshold ||</div><div class="line"><a name="l02360"></a><span class="lineno"> 2360</span>  (only_booleans && !is_boolean)) {</div><div class="line"><a name="l02361"></a><span class="lineno"> 2361</span>  <span class="comment">// We keep this term.</span></div><div class="line"><a name="l02362"></a><span class="lineno"> 2362</span>  mutable_arg->set_vars(new_size, mutable_arg->vars(i));</div><div class="line"><a name="l02363"></a><span class="lineno"> 2363</span>  mutable_arg->set_coeffs(new_size, mutable_arg->coeffs(i));</div><div class="line"><a name="l02364"></a><span class="lineno"> 2364</span>  ++new_size;</div><div class="line"><a name="l02365"></a><span class="lineno"> 2365</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l02366"></a><span class="lineno"> 2366</span>  }</div><div class="line"><a name="l02367"></a><span class="lineno"> 2367</span> </div><div class="line"><a name="l02368"></a><span class="lineno"> 2368</span>  <span class="keywordflow">if</span> (is_boolean) {</div><div class="line"><a name="l02369"></a><span class="lineno"> 2369</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"linear: extracted enforcement literal"</span>);</div><div class="line"><a name="l02370"></a><span class="lineno"> 2370</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l02371"></a><span class="lineno"> 2371</span>  some_integer_encoding_were_extracted = <span class="keyword">true</span>;</div><div class="line"><a name="l02372"></a><span class="lineno"> 2372</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(</div><div class="line"><a name="l02373"></a><span class="lineno"> 2373</span>  <span class="stringliteral">"linear: extracted integer enforcement literal"</span>);</div><div class="line"><a name="l02374"></a><span class="lineno"> 2374</span>  }</div><div class="line"><a name="l02375"></a><span class="lineno"> 2375</span>  <span class="keywordflow">if</span> (lower_bounded) {</div><div class="line"><a name="l02376"></a><span class="lineno"> 2376</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->add_enforcement_literal(is_boolean</div><div class="line"><a name="l02377"></a><span class="lineno"> 2377</span>  ? <a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(ref)</div><div class="line"><a name="l02378"></a><span class="lineno"> 2378</span>  : context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a4f9423ff72ed20e477fff16e8887df96">GetOrCreateVarValueEncoding</a>(</div><div class="line"><a name="l02379"></a><span class="lineno"> 2379</span>  ref, context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(ref)));</div><div class="line"><a name="l02380"></a><span class="lineno"> 2380</span>  rhs_offset -= coeff * context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(ref);</div><div class="line"><a name="l02381"></a><span class="lineno"> 2381</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l02382"></a><span class="lineno"> 2382</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->add_enforcement_literal(is_boolean</div><div class="line"><a name="l02383"></a><span class="lineno"> 2383</span>  ? ref</div><div class="line"><a name="l02384"></a><span class="lineno"> 2384</span>  : context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a4f9423ff72ed20e477fff16e8887df96">GetOrCreateVarValueEncoding</a>(</div><div class="line"><a name="l02385"></a><span class="lineno"> 2385</span>  ref, context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a00f995618e00d575372ff823a12553a9">MaxOf</a>(ref)));</div><div class="line"><a name="l02386"></a><span class="lineno"> 2386</span>  rhs_offset -= coeff * context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a00f995618e00d575372ff823a12553a9">MaxOf</a>(ref);</div><div class="line"><a name="l02387"></a><span class="lineno"> 2387</span>  }</div><div class="line"><a name="l02388"></a><span class="lineno"> 2388</span>  }</div><div class="line"><a name="l02389"></a><span class="lineno"> 2389</span>  mutable_arg->mutable_vars()->Truncate(new_size);</div><div class="line"><a name="l02390"></a><span class="lineno"> 2390</span>  mutable_arg->mutable_coeffs()->Truncate(new_size);</div><div class="line"><a name="l02391"></a><span class="lineno"> 2391</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a901c19b12842f8af153e588a689a90b5">FillDomainInProto</a>(rhs_domain.AdditionWith(Domain(rhs_offset)), mutable_arg);</div><div class="line"><a name="l02392"></a><span class="lineno"> 2392</span>  <span class="keywordflow">if</span> (some_integer_encoding_were_extracted) {</div><div class="line"><a name="l02393"></a><span class="lineno"> 2393</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l02394"></a><span class="lineno"> 2394</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab75a27c0aeda2de9c3957719b8196c36">UpdateConstraintVariableUsage</a>(ct_index);</div><div class="line"><a name="l02395"></a><span class="lineno"> 2395</span>  }</div><div class="line"><a name="l02396"></a><span class="lineno"> 2396</span> }</div><div class="line"><a name="l02397"></a><span class="lineno"> 2397</span> </div><div class="line"><a name="l02398"></a><span class="lineno"> 2398</span> <span class="keywordtype">void</span> CpModelPresolver::ExtractAtMostOneFromLinear(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l02399"></a><span class="lineno"> 2399</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span>;</div><div class="line"><a name="l02400"></a><span class="lineno"> 2400</span>  <span class="keywordflow">if</span> (<a class="code" href="namespaceoperations__research_1_1sat.html#a42a3b266d8c6dfab1c14baa6c04e2333">HasEnforcementLiteral</a>(*<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) <span class="keywordflow">return</span>;</div><div class="line"><a name="l02401"></a><span class="lineno"> 2401</span>  <span class="keyword">const</span> Domain rhs = <a class="code" href="namespaceoperations__research_1_1sat.html#ab1240060466ba48a36a4b36379bce26a">ReadDomainFromProto</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear());</div><div class="line"><a name="l02402"></a><span class="lineno"> 2402</span> </div><div class="line"><a name="l02403"></a><span class="lineno"> 2403</span>  <span class="keyword">const</span> LinearConstraintProto& arg = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear();</div><div class="line"><a name="l02404"></a><span class="lineno"> 2404</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> num_vars = arg.vars_size();</div><div class="line"><a name="l02405"></a><span class="lineno"> 2405</span>  int64_t min_sum = 0;</div><div class="line"><a name="l02406"></a><span class="lineno"> 2406</span>  int64_t max_sum = 0;</div><div class="line"><a name="l02407"></a><span class="lineno"> 2407</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num_vars; ++i) {</div><div class="line"><a name="l02408"></a><span class="lineno"> 2408</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> ref = arg.vars(i);</div><div class="line"><a name="l02409"></a><span class="lineno"> 2409</span>  <span class="keyword">const</span> int64_t coeff = arg.coeffs(i);</div><div class="line"><a name="l02410"></a><span class="lineno"> 2410</span>  <span class="keyword">const</span> int64_t term_a = coeff * context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(ref);</div><div class="line"><a name="l02411"></a><span class="lineno"> 2411</span>  <span class="keyword">const</span> int64_t term_b = coeff * context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a00f995618e00d575372ff823a12553a9">MaxOf</a>(ref);</div><div class="line"><a name="l02412"></a><span class="lineno"> 2412</span>  min_sum += <a class="code" href="alldiff__cst_8cc.html#ad10edae0a852d72fb76afb1c77735045">std::min</a>(term_a, term_b);</div><div class="line"><a name="l02413"></a><span class="lineno"> 2413</span>  max_sum += <a class="code" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::max</a>(term_a, term_b);</div><div class="line"><a name="l02414"></a><span class="lineno"> 2414</span>  }</div><div class="line"><a name="l02415"></a><span class="lineno"> 2415</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> type : {0, 1}) {</div><div class="line"><a name="l02416"></a><span class="lineno"> 2416</span>  std::vector<int> at_most_one;</div><div class="line"><a name="l02417"></a><span class="lineno"> 2417</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num_vars; ++i) {</div><div class="line"><a name="l02418"></a><span class="lineno"> 2418</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> ref = arg.vars(i);</div><div class="line"><a name="l02419"></a><span class="lineno"> 2419</span>  <span class="keyword">const</span> int64_t coeff = arg.coeffs(i);</div><div class="line"><a name="l02420"></a><span class="lineno"> 2420</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(ref) != 0) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l02421"></a><span class="lineno"> 2421</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a00f995618e00d575372ff823a12553a9">MaxOf</a>(ref) != 1) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l02422"></a><span class="lineno"> 2422</span> </div><div class="line"><a name="l02423"></a><span class="lineno"> 2423</span>  <span class="keywordflow">if</span> (type == 0) {</div><div class="line"><a name="l02424"></a><span class="lineno"> 2424</span>  <span class="comment">// TODO(user): we could add one more Boolean with a lower coeff as long</span></div><div class="line"><a name="l02425"></a><span class="lineno"> 2425</span>  <span class="comment">// as we have lower_coeff + min_of_other_coeff > rhs.Max().</span></div><div class="line"><a name="l02426"></a><span class="lineno"> 2426</span>  <span class="keywordflow">if</span> (min_sum + 2 * std::abs(coeff) > rhs.Max()) {</div><div class="line"><a name="l02427"></a><span class="lineno"> 2427</span>  at_most_one.push_back(coeff > 0 ? ref : <a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(ref));</div><div class="line"><a name="l02428"></a><span class="lineno"> 2428</span>  }</div><div class="line"><a name="l02429"></a><span class="lineno"> 2429</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l02430"></a><span class="lineno"> 2430</span>  <span class="keywordflow">if</span> (max_sum - 2 * std::abs(coeff) < rhs.Min()) {</div><div class="line"><a name="l02431"></a><span class="lineno"> 2431</span>  at_most_one.push_back(coeff > 0 ? <a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(ref) : ref);</div><div class="line"><a name="l02432"></a><span class="lineno"> 2432</span>  }</div><div class="line"><a name="l02433"></a><span class="lineno"> 2433</span>  }</div><div class="line"><a name="l02434"></a><span class="lineno"> 2434</span>  }</div><div class="line"><a name="l02435"></a><span class="lineno"> 2435</span>  <span class="keywordflow">if</span> (at_most_one.size() > 1) {</div><div class="line"><a name="l02436"></a><span class="lineno"> 2436</span>  <span class="keywordflow">if</span> (type == 0) {</div><div class="line"><a name="l02437"></a><span class="lineno"> 2437</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"linear: extracted at most one (max)."</span>);</div><div class="line"><a name="l02438"></a><span class="lineno"> 2438</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l02439"></a><span class="lineno"> 2439</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"linear: extracted at most one (min)."</span>);</div><div class="line"><a name="l02440"></a><span class="lineno"> 2440</span>  }</div><div class="line"><a name="l02441"></a><span class="lineno"> 2441</span>  ConstraintProto* new_ct = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>();</div><div class="line"><a name="l02442"></a><span class="lineno"> 2442</span>  new_ct-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a74f7eb449a6e182b73c8b4a1dbf15ce6">set_name</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->name());</div><div class="line"><a name="l02443"></a><span class="lineno"> 2443</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> ref : at_most_one) {</div><div class="line"><a name="l02444"></a><span class="lineno"> 2444</span>  new_ct->mutable_at_most_one()->add_literals(ref);</div><div class="line"><a name="l02445"></a><span class="lineno"> 2445</span>  }</div><div class="line"><a name="l02446"></a><span class="lineno"> 2446</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l02447"></a><span class="lineno"> 2447</span>  }</div><div class="line"><a name="l02448"></a><span class="lineno"> 2448</span>  }</div><div class="line"><a name="l02449"></a><span class="lineno"> 2449</span> }</div><div class="line"><a name="l02450"></a><span class="lineno"> 2450</span> </div><div class="line"><a name="l02451"></a><span class="lineno"> 2451</span> <span class="comment">// Convert some linear constraint involving only Booleans to their Boolean</span></div><div class="line"><a name="l02452"></a><span class="lineno"> 2452</span> <span class="comment">// form.</span></div><div class="line"><a name="l02453"></a><span class="lineno"> 2453</span> <span class="keywordtype">bool</span> CpModelPresolver::PresolveLinearOnBooleans(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l02454"></a><span class="lineno"> 2454</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->constraint_case() != ConstraintProto::ConstraintCase::kLinear ||</div><div class="line"><a name="l02455"></a><span class="lineno"> 2455</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) {</div><div class="line"><a name="l02456"></a><span class="lineno"> 2456</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l02457"></a><span class="lineno"> 2457</span>  }</div><div class="line"><a name="l02458"></a><span class="lineno"> 2458</span> </div><div class="line"><a name="l02459"></a><span class="lineno"> 2459</span>  <span class="keyword">const</span> LinearConstraintProto& arg = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear();</div><div class="line"><a name="l02460"></a><span class="lineno"> 2460</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> num_vars = arg.vars_size();</div><div class="line"><a name="l02461"></a><span class="lineno"> 2461</span>  int64_t min_coeff = <a class="code" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::numeric_limits<int64_t>::max</a>();</div><div class="line"><a name="l02462"></a><span class="lineno"> 2462</span>  int64_t max_coeff = 0;</div><div class="line"><a name="l02463"></a><span class="lineno"> 2463</span>  int64_t min_sum = 0;</div><div class="line"><a name="l02464"></a><span class="lineno"> 2464</span>  int64_t max_sum = 0;</div><div class="line"><a name="l02465"></a><span class="lineno"> 2465</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num_vars; ++i) {</div><div class="line"><a name="l02466"></a><span class="lineno"> 2466</span>  <span class="comment">// We assume we already ran PresolveLinear().</span></div><div class="line"><a name="l02467"></a><span class="lineno"> 2467</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = arg.vars(i);</div><div class="line"><a name="l02468"></a><span class="lineno"> 2468</span>  <span class="keyword">const</span> int64_t coeff = arg.coeffs(i);</div><div class="line"><a name="l02469"></a><span class="lineno"> 2469</span>  <a class="code" href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a>(<a class="code" href="namespaceoperations__research_1_1sat.html#a217338425de4389014563f1f24331713">RefIsPositive</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>));</div><div class="line"><a name="l02470"></a><span class="lineno"> 2470</span>  <a class="code" href="base_2logging_8h.html#ab25e01a2942b821d66371fc68d53f2eb">CHECK_NE</a>(coeff, 0);</div><div class="line"><a name="l02471"></a><span class="lineno"> 2471</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) != 0) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l02472"></a><span class="lineno"> 2472</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a00f995618e00d575372ff823a12553a9">MaxOf</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) != 1) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l02473"></a><span class="lineno"> 2473</span> </div><div class="line"><a name="l02474"></a><span class="lineno"> 2474</span>  <span class="keywordflow">if</span> (coeff > 0) {</div><div class="line"><a name="l02475"></a><span class="lineno"> 2475</span>  max_sum += coeff;</div><div class="line"><a name="l02476"></a><span class="lineno"> 2476</span>  min_coeff = <a class="code" href="alldiff__cst_8cc.html#ad10edae0a852d72fb76afb1c77735045">std::min</a>(min_coeff, coeff);</div><div class="line"><a name="l02477"></a><span class="lineno"> 2477</span>  max_coeff = <a class="code" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::max</a>(max_coeff, coeff);</div><div class="line"><a name="l02478"></a><span class="lineno"> 2478</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l02479"></a><span class="lineno"> 2479</span>  <span class="comment">// We replace the Boolean ref, by a ref to its negation (1 - x).</span></div><div class="line"><a name="l02480"></a><span class="lineno"> 2480</span>  min_sum += coeff;</div><div class="line"><a name="l02481"></a><span class="lineno"> 2481</span>  min_coeff = <a class="code" href="alldiff__cst_8cc.html#ad10edae0a852d72fb76afb1c77735045">std::min</a>(min_coeff, -coeff);</div><div class="line"><a name="l02482"></a><span class="lineno"> 2482</span>  max_coeff = <a class="code" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::max</a>(max_coeff, -coeff);</div><div class="line"><a name="l02483"></a><span class="lineno"> 2483</span>  }</div><div class="line"><a name="l02484"></a><span class="lineno"> 2484</span>  }</div><div class="line"><a name="l02485"></a><span class="lineno"> 2485</span>  <a class="code" href="base_2logging_8h.html#ae4db23f10f5d4aad6d735f5a74cd6f8c">CHECK_LE</a>(min_coeff, max_coeff);</div><div class="line"><a name="l02486"></a><span class="lineno"> 2486</span> </div><div class="line"><a name="l02487"></a><span class="lineno"> 2487</span>  <span class="comment">// Detect trivially true/false constraints. Note that this is not necessarily</span></div><div class="line"><a name="l02488"></a><span class="lineno"> 2488</span>  <span class="comment">// detected by PresolveLinear(). We do that here because we assume below</span></div><div class="line"><a name="l02489"></a><span class="lineno"> 2489</span>  <span class="comment">// that this cannot happen.</span></div><div class="line"><a name="l02490"></a><span class="lineno"> 2490</span>  <span class="comment">//</span></div><div class="line"><a name="l02491"></a><span class="lineno"> 2491</span>  <span class="comment">// TODO(user): this could be generalized to constraint not containing only</span></div><div class="line"><a name="l02492"></a><span class="lineno"> 2492</span>  <span class="comment">// Booleans.</span></div><div class="line"><a name="l02493"></a><span class="lineno"> 2493</span>  <span class="keyword">const</span> Domain rhs_domain = <a class="code" href="namespaceoperations__research_1_1sat.html#ab1240060466ba48a36a4b36379bce26a">ReadDomainFromProto</a>(arg);</div><div class="line"><a name="l02494"></a><span class="lineno"> 2494</span>  <span class="keywordflow">if</span> ((!rhs_domain.Contains(min_sum) &&</div><div class="line"><a name="l02495"></a><span class="lineno"> 2495</span>  min_sum + min_coeff > rhs_domain.Max()) ||</div><div class="line"><a name="l02496"></a><span class="lineno"> 2496</span>  (!rhs_domain.Contains(max_sum) &&</div><div class="line"><a name="l02497"></a><span class="lineno"> 2497</span>  max_sum - min_coeff < rhs_domain.Min())) {</div><div class="line"><a name="l02498"></a><span class="lineno"> 2498</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"linear: all booleans and trivially false"</span>);</div><div class="line"><a name="l02499"></a><span class="lineno"> 2499</span>  <span class="keywordflow">return</span> MarkConstraintAsFalse(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l02500"></a><span class="lineno"> 2500</span>  }</div><div class="line"><a name="l02501"></a><span class="lineno"> 2501</span>  <span class="keywordflow">if</span> (Domain(min_sum, max_sum).IsIncludedIn(rhs_domain)) {</div><div class="line"><a name="l02502"></a><span class="lineno"> 2502</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"linear: all booleans and trivially true"</span>);</div><div class="line"><a name="l02503"></a><span class="lineno"> 2503</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l02504"></a><span class="lineno"> 2504</span>  }</div><div class="line"><a name="l02505"></a><span class="lineno"> 2505</span> </div><div class="line"><a name="l02506"></a><span class="lineno"> 2506</span>  <span class="comment">// Detect clauses, reified ands, at_most_one.</span></div><div class="line"><a name="l02507"></a><span class="lineno"> 2507</span>  <span class="comment">//</span></div><div class="line"><a name="l02508"></a><span class="lineno"> 2508</span>  <span class="comment">// TODO(user): split a == 1 constraint or similar into a clause and an at</span></div><div class="line"><a name="l02509"></a><span class="lineno"> 2509</span>  <span class="comment">// most one constraint?</span></div><div class="line"><a name="l02510"></a><span class="lineno"> 2510</span>  <a class="code" href="base_2logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a>(!rhs_domain.IsEmpty());</div><div class="line"><a name="l02511"></a><span class="lineno"> 2511</span>  <span class="keywordflow">if</span> (min_sum + min_coeff > rhs_domain.Max()) {</div><div class="line"><a name="l02512"></a><span class="lineno"> 2512</span>  <span class="comment">// All Boolean are false if the reified literal is true.</span></div><div class="line"><a name="l02513"></a><span class="lineno"> 2513</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"linear: negative reified and"</span>);</div><div class="line"><a name="l02514"></a><span class="lineno"> 2514</span>  <span class="keyword">const</span> <span class="keyword">auto</span> copy = arg;</div><div class="line"><a name="l02515"></a><span class="lineno"> 2515</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_bool_and()->clear_literals();</div><div class="line"><a name="l02516"></a><span class="lineno"> 2516</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num_vars; ++i) {</div><div class="line"><a name="l02517"></a><span class="lineno"> 2517</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_bool_and()->add_literals(</div><div class="line"><a name="l02518"></a><span class="lineno"> 2518</span>  copy.coeffs(i) > 0 ? <a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(copy.vars(i)) : copy.vars(i));</div><div class="line"><a name="l02519"></a><span class="lineno"> 2519</span>  }</div><div class="line"><a name="l02520"></a><span class="lineno"> 2520</span>  PresolveBoolAnd(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l02521"></a><span class="lineno"> 2521</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l02522"></a><span class="lineno"> 2522</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (max_sum - min_coeff < rhs_domain.Min()) {</div><div class="line"><a name="l02523"></a><span class="lineno"> 2523</span>  <span class="comment">// All Boolean are true if the reified literal is true.</span></div><div class="line"><a name="l02524"></a><span class="lineno"> 2524</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"linear: positive reified and"</span>);</div><div class="line"><a name="l02525"></a><span class="lineno"> 2525</span>  <span class="keyword">const</span> <span class="keyword">auto</span> copy = arg;</div><div class="line"><a name="l02526"></a><span class="lineno"> 2526</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_bool_and()->clear_literals();</div><div class="line"><a name="l02527"></a><span class="lineno"> 2527</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num_vars; ++i) {</div><div class="line"><a name="l02528"></a><span class="lineno"> 2528</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_bool_and()->add_literals(</div><div class="line"><a name="l02529"></a><span class="lineno"> 2529</span>  copy.coeffs(i) > 0 ? copy.vars(i) : <a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(copy.vars(i)));</div><div class="line"><a name="l02530"></a><span class="lineno"> 2530</span>  }</div><div class="line"><a name="l02531"></a><span class="lineno"> 2531</span>  PresolveBoolAnd(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l02532"></a><span class="lineno"> 2532</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l02533"></a><span class="lineno"> 2533</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (min_sum + min_coeff >= rhs_domain.Min() &&</div><div class="line"><a name="l02534"></a><span class="lineno"> 2534</span>  rhs_domain.front().end >= max_sum) {</div><div class="line"><a name="l02535"></a><span class="lineno"> 2535</span>  <span class="comment">// At least one Boolean is true.</span></div><div class="line"><a name="l02536"></a><span class="lineno"> 2536</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"linear: positive clause"</span>);</div><div class="line"><a name="l02537"></a><span class="lineno"> 2537</span>  <span class="keyword">const</span> <span class="keyword">auto</span> copy = arg;</div><div class="line"><a name="l02538"></a><span class="lineno"> 2538</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_bool_or()->clear_literals();</div><div class="line"><a name="l02539"></a><span class="lineno"> 2539</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num_vars; ++i) {</div><div class="line"><a name="l02540"></a><span class="lineno"> 2540</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_bool_or()->add_literals(</div><div class="line"><a name="l02541"></a><span class="lineno"> 2541</span>  copy.coeffs(i) > 0 ? copy.vars(i) : <a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(copy.vars(i)));</div><div class="line"><a name="l02542"></a><span class="lineno"> 2542</span>  }</div><div class="line"><a name="l02543"></a><span class="lineno"> 2543</span>  PresolveBoolOr(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l02544"></a><span class="lineno"> 2544</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l02545"></a><span class="lineno"> 2545</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (max_sum - min_coeff <= rhs_domain.Max() &&</div><div class="line"><a name="l02546"></a><span class="lineno"> 2546</span>  rhs_domain.back().start <= min_sum) {</div><div class="line"><a name="l02547"></a><span class="lineno"> 2547</span>  <span class="comment">// At least one Boolean is false.</span></div><div class="line"><a name="l02548"></a><span class="lineno"> 2548</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"linear: negative clause"</span>);</div><div class="line"><a name="l02549"></a><span class="lineno"> 2549</span>  <span class="keyword">const</span> <span class="keyword">auto</span> copy = arg;</div><div class="line"><a name="l02550"></a><span class="lineno"> 2550</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_bool_or()->clear_literals();</div><div class="line"><a name="l02551"></a><span class="lineno"> 2551</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num_vars; ++i) {</div><div class="line"><a name="l02552"></a><span class="lineno"> 2552</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_bool_or()->add_literals(</div><div class="line"><a name="l02553"></a><span class="lineno"> 2553</span>  copy.coeffs(i) > 0 ? <a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(copy.vars(i)) : copy.vars(i));</div><div class="line"><a name="l02554"></a><span class="lineno"> 2554</span>  }</div><div class="line"><a name="l02555"></a><span class="lineno"> 2555</span>  PresolveBoolOr(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l02556"></a><span class="lineno"> 2556</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l02557"></a><span class="lineno"> 2557</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (!<a class="code" href="namespaceoperations__research_1_1sat.html#a42a3b266d8c6dfab1c14baa6c04e2333">HasEnforcementLiteral</a>(*<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) &&</div><div class="line"><a name="l02558"></a><span class="lineno"> 2558</span>  min_sum + max_coeff <= rhs_domain.Max() &&</div><div class="line"><a name="l02559"></a><span class="lineno"> 2559</span>  min_sum + 2 * min_coeff > rhs_domain.Max() &&</div><div class="line"><a name="l02560"></a><span class="lineno"> 2560</span>  rhs_domain.back().start <= min_sum) {</div><div class="line"><a name="l02561"></a><span class="lineno"> 2561</span>  <span class="comment">// At most one Boolean is true.</span></div><div class="line"><a name="l02562"></a><span class="lineno"> 2562</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"linear: positive at most one"</span>);</div><div class="line"><a name="l02563"></a><span class="lineno"> 2563</span>  <span class="keyword">const</span> <span class="keyword">auto</span> copy = arg;</div><div class="line"><a name="l02564"></a><span class="lineno"> 2564</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_at_most_one()->clear_literals();</div><div class="line"><a name="l02565"></a><span class="lineno"> 2565</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num_vars; ++i) {</div><div class="line"><a name="l02566"></a><span class="lineno"> 2566</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_at_most_one()->add_literals(</div><div class="line"><a name="l02567"></a><span class="lineno"> 2567</span>  copy.coeffs(i) > 0 ? copy.vars(i) : <a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(copy.vars(i)));</div><div class="line"><a name="l02568"></a><span class="lineno"> 2568</span>  }</div><div class="line"><a name="l02569"></a><span class="lineno"> 2569</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l02570"></a><span class="lineno"> 2570</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (!<a class="code" href="namespaceoperations__research_1_1sat.html#a42a3b266d8c6dfab1c14baa6c04e2333">HasEnforcementLiteral</a>(*<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) &&</div><div class="line"><a name="l02571"></a><span class="lineno"> 2571</span>  max_sum - max_coeff >= rhs_domain.Min() &&</div><div class="line"><a name="l02572"></a><span class="lineno"> 2572</span>  max_sum - 2 * min_coeff < rhs_domain.Min() &&</div><div class="line"><a name="l02573"></a><span class="lineno"> 2573</span>  rhs_domain.front().end >= max_sum) {</div><div class="line"><a name="l02574"></a><span class="lineno"> 2574</span>  <span class="comment">// At most one Boolean is false.</span></div><div class="line"><a name="l02575"></a><span class="lineno"> 2575</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"linear: negative at most one"</span>);</div><div class="line"><a name="l02576"></a><span class="lineno"> 2576</span>  <span class="keyword">const</span> <span class="keyword">auto</span> copy = arg;</div><div class="line"><a name="l02577"></a><span class="lineno"> 2577</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_at_most_one()->clear_literals();</div><div class="line"><a name="l02578"></a><span class="lineno"> 2578</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num_vars; ++i) {</div><div class="line"><a name="l02579"></a><span class="lineno"> 2579</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_at_most_one()->add_literals(</div><div class="line"><a name="l02580"></a><span class="lineno"> 2580</span>  copy.coeffs(i) > 0 ? <a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(copy.vars(i)) : copy.vars(i));</div><div class="line"><a name="l02581"></a><span class="lineno"> 2581</span>  }</div><div class="line"><a name="l02582"></a><span class="lineno"> 2582</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l02583"></a><span class="lineno"> 2583</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (!<a class="code" href="namespaceoperations__research_1_1sat.html#a42a3b266d8c6dfab1c14baa6c04e2333">HasEnforcementLiteral</a>(*<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) && rhs_domain.NumIntervals() == 1 &&</div><div class="line"><a name="l02584"></a><span class="lineno"> 2584</span>  min_sum < rhs_domain.Min() &&</div><div class="line"><a name="l02585"></a><span class="lineno"> 2585</span>  min_sum + min_coeff >= rhs_domain.Min() &&</div><div class="line"><a name="l02586"></a><span class="lineno"> 2586</span>  min_sum + 2 * min_coeff > rhs_domain.Max() &&</div><div class="line"><a name="l02587"></a><span class="lineno"> 2587</span>  min_sum + max_coeff <= rhs_domain.Max()) {</div><div class="line"><a name="l02588"></a><span class="lineno"> 2588</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"linear: positive equal one"</span>);</div><div class="line"><a name="l02589"></a><span class="lineno"> 2589</span>  ConstraintProto* exactly_one = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>();</div><div class="line"><a name="l02590"></a><span class="lineno"> 2590</span>  exactly_one-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a74f7eb449a6e182b73c8b4a1dbf15ce6">set_name</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->name());</div><div class="line"><a name="l02591"></a><span class="lineno"> 2591</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num_vars; ++i) {</div><div class="line"><a name="l02592"></a><span class="lineno"> 2592</span>  exactly_one->mutable_exactly_one()->add_literals(</div><div class="line"><a name="l02593"></a><span class="lineno"> 2593</span>  arg.coeffs(i) > 0 ? arg.vars(i) : <a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(arg.vars(i)));</div><div class="line"><a name="l02594"></a><span class="lineno"> 2594</span>  }</div><div class="line"><a name="l02595"></a><span class="lineno"> 2595</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l02596"></a><span class="lineno"> 2596</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l02597"></a><span class="lineno"> 2597</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (!<a class="code" href="namespaceoperations__research_1_1sat.html#a42a3b266d8c6dfab1c14baa6c04e2333">HasEnforcementLiteral</a>(*<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) && rhs_domain.NumIntervals() == 1 &&</div><div class="line"><a name="l02598"></a><span class="lineno"> 2598</span>  max_sum > rhs_domain.Max() &&</div><div class="line"><a name="l02599"></a><span class="lineno"> 2599</span>  max_sum - min_coeff <= rhs_domain.Max() &&</div><div class="line"><a name="l02600"></a><span class="lineno"> 2600</span>  max_sum - 2 * min_coeff < rhs_domain.Min() &&</div><div class="line"><a name="l02601"></a><span class="lineno"> 2601</span>  max_sum - max_coeff >= rhs_domain.Min()) {</div><div class="line"><a name="l02602"></a><span class="lineno"> 2602</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"linear: negative equal one"</span>);</div><div class="line"><a name="l02603"></a><span class="lineno"> 2603</span>  ConstraintProto* exactly_one = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>();</div><div class="line"><a name="l02604"></a><span class="lineno"> 2604</span>  exactly_one-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a74f7eb449a6e182b73c8b4a1dbf15ce6">set_name</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->name());</div><div class="line"><a name="l02605"></a><span class="lineno"> 2605</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num_vars; ++i) {</div><div class="line"><a name="l02606"></a><span class="lineno"> 2606</span>  exactly_one->mutable_exactly_one()->add_literals(</div><div class="line"><a name="l02607"></a><span class="lineno"> 2607</span>  arg.coeffs(i) > 0 ? <a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(arg.vars(i)) : arg.vars(i));</div><div class="line"><a name="l02608"></a><span class="lineno"> 2608</span>  }</div><div class="line"><a name="l02609"></a><span class="lineno"> 2609</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l02610"></a><span class="lineno"> 2610</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l02611"></a><span class="lineno"> 2611</span>  }</div><div class="line"><a name="l02612"></a><span class="lineno"> 2612</span> </div><div class="line"><a name="l02613"></a><span class="lineno"> 2613</span>  <span class="comment">// Expand small expression into clause.</span></div><div class="line"><a name="l02614"></a><span class="lineno"> 2614</span>  <span class="comment">//</span></div><div class="line"><a name="l02615"></a><span class="lineno"> 2615</span>  <span class="comment">// TODO(user): This is bad from a LP relaxation perspective. Do not do that</span></div><div class="line"><a name="l02616"></a><span class="lineno"> 2616</span>  <span class="comment">// now? On another hand it is good for the SAT presolving.</span></div><div class="line"><a name="l02617"></a><span class="lineno"> 2617</span>  <span class="keywordflow">if</span> (num_vars > 3) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l02618"></a><span class="lineno"> 2618</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"linear: small Boolean expression"</span>);</div><div class="line"><a name="l02619"></a><span class="lineno"> 2619</span> </div><div class="line"><a name="l02620"></a><span class="lineno"> 2620</span>  <span class="comment">// Enumerate all possible value of the Booleans and add a clause if constraint</span></div><div class="line"><a name="l02621"></a><span class="lineno"> 2621</span>  <span class="comment">// is false. TODO(user): the encoding could be made better in some cases.</span></div><div class="line"><a name="l02622"></a><span class="lineno"> 2622</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> max_mask = (1 << arg.vars_size());</div><div class="line"><a name="l02623"></a><span class="lineno"> 2623</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> mask = 0; mask < max_mask; ++mask) {</div><div class="line"><a name="l02624"></a><span class="lineno"> 2624</span>  int64_t <a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a> = 0;</div><div class="line"><a name="l02625"></a><span class="lineno"> 2625</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num_vars; ++i) {</div><div class="line"><a name="l02626"></a><span class="lineno"> 2626</span>  <span class="keywordflow">if</span> ((mask >> i) & 1) <a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a> += arg.coeffs(i);</div><div class="line"><a name="l02627"></a><span class="lineno"> 2627</span>  }</div><div class="line"><a name="l02628"></a><span class="lineno"> 2628</span>  <span class="keywordflow">if</span> (rhs_domain.Contains(<a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a>)) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l02629"></a><span class="lineno"> 2629</span> </div><div class="line"><a name="l02630"></a><span class="lineno"> 2630</span>  <span class="comment">// Add a new clause to exclude this bad assignment.</span></div><div class="line"><a name="l02631"></a><span class="lineno"> 2631</span>  ConstraintProto* new_ct = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>();</div><div class="line"><a name="l02632"></a><span class="lineno"> 2632</span>  <span class="keyword">auto</span>* new_arg = new_ct-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ae26e2a099b411b50dd1d4c6605837d0a">mutable_bool_or</a>();</div><div class="line"><a name="l02633"></a><span class="lineno"> 2633</span>  <span class="keywordflow">if</span> (<a class="code" href="namespaceoperations__research_1_1sat.html#a42a3b266d8c6dfab1c14baa6c04e2333">HasEnforcementLiteral</a>(*<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) {</div><div class="line"><a name="l02634"></a><span class="lineno"> 2634</span>  *new_ct->mutable_enforcement_literal() = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->enforcement_literal();</div><div class="line"><a name="l02635"></a><span class="lineno"> 2635</span>  }</div><div class="line"><a name="l02636"></a><span class="lineno"> 2636</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num_vars; ++i) {</div><div class="line"><a name="l02637"></a><span class="lineno"> 2637</span>  new_arg->add_literals(((mask >> i) & 1) ? <a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(arg.vars(i))</div><div class="line"><a name="l02638"></a><span class="lineno"> 2638</span>  : arg.vars(i));</div><div class="line"><a name="l02639"></a><span class="lineno"> 2639</span>  }</div><div class="line"><a name="l02640"></a><span class="lineno"> 2640</span>  }</div><div class="line"><a name="l02641"></a><span class="lineno"> 2641</span> </div><div class="line"><a name="l02642"></a><span class="lineno"> 2642</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l02643"></a><span class="lineno"> 2643</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l02644"></a><span class="lineno"> 2644</span> }</div><div class="line"><a name="l02645"></a><span class="lineno"> 2645</span> </div><div class="line"><a name="l02646"></a><span class="lineno"> 2646</span> <span class="keyword">namespace </span>{</div><div class="line"><a name="l02647"></a><span class="lineno"> 2647</span> </div><div class="line"><a name="l02648"></a><span class="lineno"> 2648</span> <span class="keywordtype">void</span> AddLinearConstraintFromInterval(<span class="keyword">const</span> ConstraintProto& <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>,</div><div class="line"><a name="l02649"></a><span class="lineno"> 2649</span>  PresolveContext* <a class="code" href="gurobi__interface_8cc.html#a5f287b83a753915ae862fed64f8640a6">context</a>) {</div><div class="line"><a name="l02650"></a><span class="lineno"> 2650</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> start = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.interval().start();</div><div class="line"><a name="l02651"></a><span class="lineno"> 2651</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> end = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.interval().end();</div><div class="line"><a name="l02652"></a><span class="lineno"> 2652</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> size = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.interval().size();</div><div class="line"><a name="l02653"></a><span class="lineno"> 2653</span>  ConstraintProto* new_ct = <a class="code" href="gurobi__interface_8cc.html#a5f287b83a753915ae862fed64f8640a6">context</a>->working_model->add_constraints();</div><div class="line"><a name="l02654"></a><span class="lineno"> 2654</span>  *(new_ct->mutable_enforcement_literal()) = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.enforcement_literal();</div><div class="line"><a name="l02655"></a><span class="lineno"> 2655</span>  new_ct->mutable_linear()->add_domain(0);</div><div class="line"><a name="l02656"></a><span class="lineno"> 2656</span>  new_ct->mutable_linear()->add_domain(0);</div><div class="line"><a name="l02657"></a><span class="lineno"> 2657</span>  new_ct->mutable_linear()->add_vars(start);</div><div class="line"><a name="l02658"></a><span class="lineno"> 2658</span>  new_ct->mutable_linear()->add_coeffs(1);</div><div class="line"><a name="l02659"></a><span class="lineno"> 2659</span>  new_ct->mutable_linear()->add_vars(size);</div><div class="line"><a name="l02660"></a><span class="lineno"> 2660</span>  new_ct->mutable_linear()->add_coeffs(1);</div><div class="line"><a name="l02661"></a><span class="lineno"> 2661</span>  new_ct->mutable_linear()->add_vars(end);</div><div class="line"><a name="l02662"></a><span class="lineno"> 2662</span>  new_ct->mutable_linear()->add_coeffs(-1);</div><div class="line"><a name="l02663"></a><span class="lineno"> 2663</span>  <a class="code" href="gurobi__interface_8cc.html#a5f287b83a753915ae862fed64f8640a6">context</a>->UpdateNewConstraintsVariableUsage();</div><div class="line"><a name="l02664"></a><span class="lineno"> 2664</span> }</div><div class="line"><a name="l02665"></a><span class="lineno"> 2665</span> </div><div class="line"><a name="l02666"></a><span class="lineno"> 2666</span> } <span class="comment">// namespace</span></div><div class="line"><a name="l02667"></a><span class="lineno"> 2667</span> </div><div class="line"><a name="l02668"></a><span class="lineno"> 2668</span> <span class="keywordtype">bool</span> CpModelPresolver::PresolveInterval(<span class="keywordtype">int</span> c, ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l02669"></a><span class="lineno"> 2669</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l02670"></a><span class="lineno"> 2670</span> </div><div class="line"><a name="l02671"></a><span class="lineno"> 2671</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->enforcement_literal().empty() && !<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->interval().has_start_view()) {</div><div class="line"><a name="l02672"></a><span class="lineno"> 2672</span>  <span class="keywordtype">bool</span> changed = <span class="keyword">false</span>;</div><div class="line"><a name="l02673"></a><span class="lineno"> 2673</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> start = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->interval().start();</div><div class="line"><a name="l02674"></a><span class="lineno"> 2674</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> end = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->interval().end();</div><div class="line"><a name="l02675"></a><span class="lineno"> 2675</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> size = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->interval().size();</div><div class="line"><a name="l02676"></a><span class="lineno"> 2676</span>  <span class="keyword">const</span> Domain start_domain = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(start);</div><div class="line"><a name="l02677"></a><span class="lineno"> 2677</span>  <span class="keyword">const</span> Domain end_domain = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(end);</div><div class="line"><a name="l02678"></a><span class="lineno"> 2678</span>  <span class="keyword">const</span> Domain size_domain = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(size);</div><div class="line"><a name="l02679"></a><span class="lineno"> 2679</span>  <span class="comment">// Size can't be negative.</span></div><div class="line"><a name="l02680"></a><span class="lineno"> 2680</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(size, Domain(0, context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a00f995618e00d575372ff823a12553a9">MaxOf</a>(size)),</div><div class="line"><a name="l02681"></a><span class="lineno"> 2681</span>  &changed)) {</div><div class="line"><a name="l02682"></a><span class="lineno"> 2682</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l02683"></a><span class="lineno"> 2683</span>  }</div><div class="line"><a name="l02684"></a><span class="lineno"> 2684</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(</div><div class="line"><a name="l02685"></a><span class="lineno"> 2685</span>  end, start_domain.AdditionWith(size_domain), &changed)) {</div><div class="line"><a name="l02686"></a><span class="lineno"> 2686</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l02687"></a><span class="lineno"> 2687</span>  }</div><div class="line"><a name="l02688"></a><span class="lineno"> 2688</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(</div><div class="line"><a name="l02689"></a><span class="lineno"> 2689</span>  start, end_domain.AdditionWith(size_domain.Negation()), &changed)) {</div><div class="line"><a name="l02690"></a><span class="lineno"> 2690</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l02691"></a><span class="lineno"> 2691</span>  }</div><div class="line"><a name="l02692"></a><span class="lineno"> 2692</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(</div><div class="line"><a name="l02693"></a><span class="lineno"> 2693</span>  size, end_domain.AdditionWith(start_domain.Negation()), &changed)) {</div><div class="line"><a name="l02694"></a><span class="lineno"> 2694</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l02695"></a><span class="lineno"> 2695</span>  }</div><div class="line"><a name="l02696"></a><span class="lineno"> 2696</span>  <span class="keywordflow">if</span> (changed) {</div><div class="line"><a name="l02697"></a><span class="lineno"> 2697</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"interval: reduced domains"</span>);</div><div class="line"><a name="l02698"></a><span class="lineno"> 2698</span>  }</div><div class="line"><a name="l02699"></a><span class="lineno"> 2699</span>  }</div><div class="line"><a name="l02700"></a><span class="lineno"> 2700</span> </div><div class="line"><a name="l02701"></a><span class="lineno"> 2701</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a90674fa816d7a066e251337852214e84">IntervalUsage</a>(c) == 0) {</div><div class="line"><a name="l02702"></a><span class="lineno"> 2702</span>  <span class="keywordflow">if</span> (!<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->interval().has_start_view()) {</div><div class="line"><a name="l02703"></a><span class="lineno"> 2703</span>  AddLinearConstraintFromInterval(*<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>, context_);</div><div class="line"><a name="l02704"></a><span class="lineno"> 2704</span>  }</div><div class="line"><a name="l02705"></a><span class="lineno"> 2705</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"interval: unused, converted to linear"</span>);</div><div class="line"><a name="l02706"></a><span class="lineno"> 2706</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l02707"></a><span class="lineno"> 2707</span>  }</div><div class="line"><a name="l02708"></a><span class="lineno"> 2708</span> </div><div class="line"><a name="l02709"></a><span class="lineno"> 2709</span>  <span class="comment">// TODO(user): Note that the conversion is not perfect for optional intervals.</span></div><div class="line"><a name="l02710"></a><span class="lineno"> 2710</span>  <span class="comment">// because for a fixed size optional interval with a different start and end</span></div><div class="line"><a name="l02711"></a><span class="lineno"> 2711</span>  <span class="comment">// variable, because of the optionality we will not be able to detect the</span></div><div class="line"><a name="l02712"></a><span class="lineno"> 2712</span>  <span class="comment">// affine relation between start and end. So we will no remove a variable like</span></div><div class="line"><a name="l02713"></a><span class="lineno"> 2713</span>  <span class="comment">// we do for non-optional fixed size intervals.</span></div><div class="line"><a name="l02714"></a><span class="lineno"> 2714</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aaabb604ccac4a6136be93bfe64e2290d">params</a>().<a class="code" href="classoperations__research_1_1sat_1_1_sat_parameters.html#a4c604caae3e19f5371529333a1555bb9">convert_intervals</a>()) {</div><div class="line"><a name="l02715"></a><span class="lineno"> 2715</span>  <span class="keywordtype">bool</span> changed = <span class="keyword">false</span>;</div><div class="line"><a name="l02716"></a><span class="lineno"> 2716</span>  IntervalConstraintProto* <a class="code" href="resource_8cc.html#af92a8383a05fdf586a52263d358f5ada">interval</a> = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_interval();</div><div class="line"><a name="l02717"></a><span class="lineno"> 2717</span>  <span class="keywordflow">if</span> (!<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->interval().has_start_view()) {</div><div class="line"><a name="l02718"></a><span class="lineno"> 2718</span>  changed = <span class="keyword">true</span>;</div><div class="line"><a name="l02719"></a><span class="lineno"> 2719</span> </div><div class="line"><a name="l02720"></a><span class="lineno"> 2720</span>  <span class="comment">// Add a linear constraint. Our new format require a separate linear</span></div><div class="line"><a name="l02721"></a><span class="lineno"> 2721</span>  <span class="comment">// constraint which allow us to reuse all the propagation code.</span></div><div class="line"><a name="l02722"></a><span class="lineno"> 2722</span>  AddLinearConstraintFromInterval(*<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>, context_);</div><div class="line"><a name="l02723"></a><span class="lineno"> 2723</span> </div><div class="line"><a name="l02724"></a><span class="lineno"> 2724</span>  <span class="comment">// Fill the view fields.</span></div><div class="line"><a name="l02725"></a><span class="lineno"> 2725</span>  <a class="code" href="resource_8cc.html#af92a8383a05fdf586a52263d358f5ada">interval</a>->mutable_start_view()->add_vars(<a class="code" href="resource_8cc.html#af92a8383a05fdf586a52263d358f5ada">interval</a>->start());</div><div class="line"><a name="l02726"></a><span class="lineno"> 2726</span>  <a class="code" href="resource_8cc.html#af92a8383a05fdf586a52263d358f5ada">interval</a>->mutable_start_view()->add_coeffs(1);</div><div class="line"><a name="l02727"></a><span class="lineno"> 2727</span>  <a class="code" href="resource_8cc.html#af92a8383a05fdf586a52263d358f5ada">interval</a>->mutable_start_view()->set_offset(0);</div><div class="line"><a name="l02728"></a><span class="lineno"> 2728</span>  <a class="code" href="resource_8cc.html#af92a8383a05fdf586a52263d358f5ada">interval</a>->mutable_size_view()->add_vars(<a class="code" href="resource_8cc.html#af92a8383a05fdf586a52263d358f5ada">interval</a>->size());</div><div class="line"><a name="l02729"></a><span class="lineno"> 2729</span>  <a class="code" href="resource_8cc.html#af92a8383a05fdf586a52263d358f5ada">interval</a>->mutable_size_view()->add_coeffs(1);</div><div class="line"><a name="l02730"></a><span class="lineno"> 2730</span>  <a class="code" href="resource_8cc.html#af92a8383a05fdf586a52263d358f5ada">interval</a>->mutable_size_view()->set_offset(0);</div><div class="line"><a name="l02731"></a><span class="lineno"> 2731</span>  <a class="code" href="resource_8cc.html#af92a8383a05fdf586a52263d358f5ada">interval</a>->mutable_end_view()->add_vars(<a class="code" href="resource_8cc.html#af92a8383a05fdf586a52263d358f5ada">interval</a>->end());</div><div class="line"><a name="l02732"></a><span class="lineno"> 2732</span>  <a class="code" href="resource_8cc.html#af92a8383a05fdf586a52263d358f5ada">interval</a>->mutable_end_view()->add_coeffs(1);</div><div class="line"><a name="l02733"></a><span class="lineno"> 2733</span>  <a class="code" href="resource_8cc.html#af92a8383a05fdf586a52263d358f5ada">interval</a>->mutable_end_view()->set_offset(0);</div><div class="line"><a name="l02734"></a><span class="lineno"> 2734</span> </div><div class="line"><a name="l02735"></a><span class="lineno"> 2735</span>  <span class="comment">// Set the old fields to their default. Not really needed.</span></div><div class="line"><a name="l02736"></a><span class="lineno"> 2736</span>  <a class="code" href="resource_8cc.html#af92a8383a05fdf586a52263d358f5ada">interval</a>->set_start(0);</div><div class="line"><a name="l02737"></a><span class="lineno"> 2737</span>  <a class="code" href="resource_8cc.html#af92a8383a05fdf586a52263d358f5ada">interval</a>->set_size(0);</div><div class="line"><a name="l02738"></a><span class="lineno"> 2738</span>  <a class="code" href="resource_8cc.html#af92a8383a05fdf586a52263d358f5ada">interval</a>->set_end(0);</div><div class="line"><a name="l02739"></a><span class="lineno"> 2739</span>  }</div><div class="line"><a name="l02740"></a><span class="lineno"> 2740</span> </div><div class="line"><a name="l02741"></a><span class="lineno"> 2741</span>  changed |=</div><div class="line"><a name="l02742"></a><span class="lineno"> 2742</span>  CanonicalizeLinearExpression(*<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>, <a class="code" href="resource_8cc.html#af92a8383a05fdf586a52263d358f5ada">interval</a>->mutable_start_view());</div><div class="line"><a name="l02743"></a><span class="lineno"> 2743</span>  changed |= CanonicalizeLinearExpression(*<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>, <a class="code" href="resource_8cc.html#af92a8383a05fdf586a52263d358f5ada">interval</a>->mutable_size_view());</div><div class="line"><a name="l02744"></a><span class="lineno"> 2744</span>  changed |= CanonicalizeLinearExpression(*<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>, <a class="code" href="resource_8cc.html#af92a8383a05fdf586a52263d358f5ada">interval</a>->mutable_end_view());</div><div class="line"><a name="l02745"></a><span class="lineno"> 2745</span>  <span class="keywordflow">return</span> changed;</div><div class="line"><a name="l02746"></a><span class="lineno"> 2746</span>  }</div><div class="line"><a name="l02747"></a><span class="lineno"> 2747</span> </div><div class="line"><a name="l02748"></a><span class="lineno"> 2748</span>  <span class="comment">// This never change the constraint-variable graph.</span></div><div class="line"><a name="l02749"></a><span class="lineno"> 2749</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l02750"></a><span class="lineno"> 2750</span> }</div><div class="line"><a name="l02751"></a><span class="lineno"> 2751</span> </div><div class="line"><a name="l02752"></a><span class="lineno"> 2752</span> <span class="comment">// TODO(user): avoid code duplication between expand and presolve.</span></div><div class="line"><a name="l02753"></a><span class="lineno"> 2753</span> <span class="keywordtype">bool</span> CpModelPresolver::PresolveInverse(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l02754"></a><span class="lineno"> 2754</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> size = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->inverse().f_direct().size();</div><div class="line"><a name="l02755"></a><span class="lineno"> 2755</span>  <span class="keywordtype">bool</span> changed = <span class="keyword">false</span>;</div><div class="line"><a name="l02756"></a><span class="lineno"> 2756</span> </div><div class="line"><a name="l02757"></a><span class="lineno"> 2757</span>  <span class="comment">// Make sure the domains are included in [0, size - 1).</span></div><div class="line"><a name="l02758"></a><span class="lineno"> 2758</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> ref : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->inverse().f_direct()) {</div><div class="line"><a name="l02759"></a><span class="lineno"> 2759</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(ref, Domain(0, size - 1), &changed)) {</div><div class="line"><a name="l02760"></a><span class="lineno"> 2760</span>  <a class="code" href="base_2logging_8h.html#afcaa7cadd41741bb855c2ada1d2ef927">VLOG</a>(1) << <span class="stringliteral">"Empty domain for a variable in ExpandInverse()"</span>;</div><div class="line"><a name="l02761"></a><span class="lineno"> 2761</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l02762"></a><span class="lineno"> 2762</span>  }</div><div class="line"><a name="l02763"></a><span class="lineno"> 2763</span>  }</div><div class="line"><a name="l02764"></a><span class="lineno"> 2764</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> ref : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->inverse().f_inverse()) {</div><div class="line"><a name="l02765"></a><span class="lineno"> 2765</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(ref, Domain(0, size - 1), &changed)) {</div><div class="line"><a name="l02766"></a><span class="lineno"> 2766</span>  <a class="code" href="base_2logging_8h.html#afcaa7cadd41741bb855c2ada1d2ef927">VLOG</a>(1) << <span class="stringliteral">"Empty domain for a variable in ExpandInverse()"</span>;</div><div class="line"><a name="l02767"></a><span class="lineno"> 2767</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l02768"></a><span class="lineno"> 2768</span>  }</div><div class="line"><a name="l02769"></a><span class="lineno"> 2769</span>  }</div><div class="line"><a name="l02770"></a><span class="lineno"> 2770</span> </div><div class="line"><a name="l02771"></a><span class="lineno"> 2771</span>  <span class="comment">// Propagate from one vector to its counterpart.</span></div><div class="line"><a name="l02772"></a><span class="lineno"> 2772</span>  <span class="comment">// Note this reaches the fixpoint as there is a one to one mapping between</span></div><div class="line"><a name="l02773"></a><span class="lineno"> 2773</span>  <span class="comment">// (variable-value) pairs in each vector.</span></div><div class="line"><a name="l02774"></a><span class="lineno"> 2774</span>  <span class="keyword">const</span> <span class="keyword">auto</span> filter_inverse_domain =</div><div class="line"><a name="l02775"></a><span class="lineno"> 2775</span>  [<span class="keyword">this</span>, size, &changed](<span class="keyword">const</span> <span class="keyword">auto</span>& direct, <span class="keyword">const</span> <span class="keyword">auto</span>& inverse) {</div><div class="line"><a name="l02776"></a><span class="lineno"> 2776</span>  <span class="comment">// Build the set of values in the inverse vector.</span></div><div class="line"><a name="l02777"></a><span class="lineno"> 2777</span>  std::vector<absl::flat_hash_set<int64_t>> inverse_values(size);</div><div class="line"><a name="l02778"></a><span class="lineno"> 2778</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < size; ++i) {</div><div class="line"><a name="l02779"></a><span class="lineno"> 2779</span>  <span class="keyword">const</span> Domain domain = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(inverse[i]);</div><div class="line"><a name="l02780"></a><span class="lineno"> 2780</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> int64_t j : domain.Values()) {</div><div class="line"><a name="l02781"></a><span class="lineno"> 2781</span>  inverse_values[i].insert(j);</div><div class="line"><a name="l02782"></a><span class="lineno"> 2782</span>  }</div><div class="line"><a name="l02783"></a><span class="lineno"> 2783</span>  }</div><div class="line"><a name="l02784"></a><span class="lineno"> 2784</span> </div><div class="line"><a name="l02785"></a><span class="lineno"> 2785</span>  <span class="comment">// Propagate from the inverse vector to the direct vector. Reduce the</span></div><div class="line"><a name="l02786"></a><span class="lineno"> 2786</span>  <span class="comment">// domains of each variable in the direct vector by checking that the</span></div><div class="line"><a name="l02787"></a><span class="lineno"> 2787</span>  <span class="comment">// inverse value exists.</span></div><div class="line"><a name="l02788"></a><span class="lineno"> 2788</span>  std::vector<int64_t> possible_values;</div><div class="line"><a name="l02789"></a><span class="lineno"> 2789</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < size; ++i) {</div><div class="line"><a name="l02790"></a><span class="lineno"> 2790</span>  possible_values.clear();</div><div class="line"><a name="l02791"></a><span class="lineno"> 2791</span>  <span class="keyword">const</span> Domain domain = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(direct[i]);</div><div class="line"><a name="l02792"></a><span class="lineno"> 2792</span>  <span class="keywordtype">bool</span> removed_value = <span class="keyword">false</span>;</div><div class="line"><a name="l02793"></a><span class="lineno"> 2793</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> int64_t j : domain.Values()) {</div><div class="line"><a name="l02794"></a><span class="lineno"> 2794</span>  <span class="keywordflow">if</span> (inverse_values[j].contains(i)) {</div><div class="line"><a name="l02795"></a><span class="lineno"> 2795</span>  possible_values.push_back(j);</div><div class="line"><a name="l02796"></a><span class="lineno"> 2796</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l02797"></a><span class="lineno"> 2797</span>  removed_value = <span class="keyword">true</span>;</div><div class="line"><a name="l02798"></a><span class="lineno"> 2798</span>  }</div><div class="line"><a name="l02799"></a><span class="lineno"> 2799</span>  }</div><div class="line"><a name="l02800"></a><span class="lineno"> 2800</span>  <span class="keywordflow">if</span> (removed_value) {</div><div class="line"><a name="l02801"></a><span class="lineno"> 2801</span>  changed = <span class="keyword">true</span>;</div><div class="line"><a name="l02802"></a><span class="lineno"> 2802</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(</div><div class="line"><a name="l02803"></a><span class="lineno"> 2803</span>  direct[i], <a class="code" href="classoperations__research_1_1_domain.html#ac2d88de67793063ad5f5e923ffd1c0eb">Domain::FromValues</a>(possible_values))) {</div><div class="line"><a name="l02804"></a><span class="lineno"> 2804</span>  <a class="code" href="base_2logging_8h.html#afcaa7cadd41741bb855c2ada1d2ef927">VLOG</a>(1) << <span class="stringliteral">"Empty domain for a variable in ExpandInverse()"</span>;</div><div class="line"><a name="l02805"></a><span class="lineno"> 2805</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l02806"></a><span class="lineno"> 2806</span>  }</div><div class="line"><a name="l02807"></a><span class="lineno"> 2807</span>  }</div><div class="line"><a name="l02808"></a><span class="lineno"> 2808</span>  }</div><div class="line"><a name="l02809"></a><span class="lineno"> 2809</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l02810"></a><span class="lineno"> 2810</span>  };</div><div class="line"><a name="l02811"></a><span class="lineno"> 2811</span> </div><div class="line"><a name="l02812"></a><span class="lineno"> 2812</span>  <span class="keywordflow">if</span> (!filter_inverse_domain(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->inverse().f_direct(),</div><div class="line"><a name="l02813"></a><span class="lineno"> 2813</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->inverse().f_inverse())) {</div><div class="line"><a name="l02814"></a><span class="lineno"> 2814</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l02815"></a><span class="lineno"> 2815</span>  }</div><div class="line"><a name="l02816"></a><span class="lineno"> 2816</span> </div><div class="line"><a name="l02817"></a><span class="lineno"> 2817</span>  <span class="keywordflow">if</span> (!filter_inverse_domain(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->inverse().f_inverse(),</div><div class="line"><a name="l02818"></a><span class="lineno"> 2818</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->inverse().f_direct())) {</div><div class="line"><a name="l02819"></a><span class="lineno"> 2819</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l02820"></a><span class="lineno"> 2820</span>  }</div><div class="line"><a name="l02821"></a><span class="lineno"> 2821</span> </div><div class="line"><a name="l02822"></a><span class="lineno"> 2822</span>  <span class="keywordflow">if</span> (changed) {</div><div class="line"><a name="l02823"></a><span class="lineno"> 2823</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"inverse: reduce domains"</span>);</div><div class="line"><a name="l02824"></a><span class="lineno"> 2824</span>  }</div><div class="line"><a name="l02825"></a><span class="lineno"> 2825</span> </div><div class="line"><a name="l02826"></a><span class="lineno"> 2826</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l02827"></a><span class="lineno"> 2827</span> }</div><div class="line"><a name="l02828"></a><span class="lineno"> 2828</span> </div><div class="line"><a name="l02829"></a><span class="lineno"> 2829</span> <span class="keywordtype">bool</span> CpModelPresolver::PresolveElement(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l02830"></a><span class="lineno"> 2830</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l02831"></a><span class="lineno"> 2831</span> </div><div class="line"><a name="l02832"></a><span class="lineno"> 2832</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->element().vars().empty()) {</div><div class="line"><a name="l02833"></a><span class="lineno"> 2833</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"element: empty array"</span>);</div><div class="line"><a name="l02834"></a><span class="lineno"> 2834</span>  <span class="keywordflow">return</span> context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5aa53538ba8adaa0bea1c3c0727425b0">NotifyThatModelIsUnsat</a>();</div><div class="line"><a name="l02835"></a><span class="lineno"> 2835</span>  }</div><div class="line"><a name="l02836"></a><span class="lineno"> 2836</span> </div><div class="line"><a name="l02837"></a><span class="lineno"> 2837</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> index_ref = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->element().index();</div><div class="line"><a name="l02838"></a><span class="lineno"> 2838</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> target_ref = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->element().target();</div><div class="line"><a name="l02839"></a><span class="lineno"> 2839</span> </div><div class="line"><a name="l02840"></a><span class="lineno"> 2840</span>  <span class="comment">// TODO(user): think about this once we do have such constraint.</span></div><div class="line"><a name="l02841"></a><span class="lineno"> 2841</span>  <span class="keywordflow">if</span> (<a class="code" href="namespaceoperations__research_1_1sat.html#a42a3b266d8c6dfab1c14baa6c04e2333">HasEnforcementLiteral</a>(*<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l02842"></a><span class="lineno"> 2842</span> </div><div class="line"><a name="l02843"></a><span class="lineno"> 2843</span>  <span class="keywordtype">bool</span> all_constants = <span class="keyword">true</span>;</div><div class="line"><a name="l02844"></a><span class="lineno"> 2844</span>  absl::flat_hash_set<int64_t> constant_set;</div><div class="line"><a name="l02845"></a><span class="lineno"> 2845</span>  <span class="keywordtype">bool</span> all_included_in_target_domain = <span class="keyword">true</span>;</div><div class="line"><a name="l02846"></a><span class="lineno"> 2846</span> </div><div class="line"><a name="l02847"></a><span class="lineno"> 2847</span>  {</div><div class="line"><a name="l02848"></a><span class="lineno"> 2848</span>  <span class="keywordtype">bool</span> reduced_index_domain = <span class="keyword">false</span>;</div><div class="line"><a name="l02849"></a><span class="lineno"> 2849</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(index_ref,</div><div class="line"><a name="l02850"></a><span class="lineno"> 2850</span>  Domain(0, <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->element().vars_size() - 1),</div><div class="line"><a name="l02851"></a><span class="lineno"> 2851</span>  &reduced_index_domain)) {</div><div class="line"><a name="l02852"></a><span class="lineno"> 2852</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l02853"></a><span class="lineno"> 2853</span>  }</div><div class="line"><a name="l02854"></a><span class="lineno"> 2854</span> </div><div class="line"><a name="l02855"></a><span class="lineno"> 2855</span>  <span class="comment">// Filter impossible index values if index == +/- target</span></div><div class="line"><a name="l02856"></a><span class="lineno"> 2856</span>  <span class="comment">//</span></div><div class="line"><a name="l02857"></a><span class="lineno"> 2857</span>  <span class="comment">// Note that this must be done before the unique_index/target rule.</span></div><div class="line"><a name="l02858"></a><span class="lineno"> 2858</span>  <span class="keywordflow">if</span> (<a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(target_ref) == <a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(index_ref)) {</div><div class="line"><a name="l02859"></a><span class="lineno"> 2859</span>  std::vector<int64_t> possible_indices;</div><div class="line"><a name="l02860"></a><span class="lineno"> 2860</span>  <span class="keyword">const</span> Domain& index_domain = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(index_ref);</div><div class="line"><a name="l02861"></a><span class="lineno"> 2861</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> int64_t index_value : index_domain.Values()) {</div><div class="line"><a name="l02862"></a><span class="lineno"> 2862</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> ref = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->element().vars(index_value);</div><div class="line"><a name="l02863"></a><span class="lineno"> 2863</span>  <span class="keyword">const</span> int64_t target_value =</div><div class="line"><a name="l02864"></a><span class="lineno"> 2864</span>  target_ref == index_ref ? index_value : -index_value;</div><div class="line"><a name="l02865"></a><span class="lineno"> 2865</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a9dd01897679ba54fca524a3b0b7d5612">DomainContains</a>(ref, target_value)) {</div><div class="line"><a name="l02866"></a><span class="lineno"> 2866</span>  possible_indices.push_back(target_value);</div><div class="line"><a name="l02867"></a><span class="lineno"> 2867</span>  }</div><div class="line"><a name="l02868"></a><span class="lineno"> 2868</span>  }</div><div class="line"><a name="l02869"></a><span class="lineno"> 2869</span>  <span class="keywordflow">if</span> (possible_indices.size() < index_domain.Size()) {</div><div class="line"><a name="l02870"></a><span class="lineno"> 2870</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(</div><div class="line"><a name="l02871"></a><span class="lineno"> 2871</span>  index_ref, <a class="code" href="classoperations__research_1_1_domain.html#ac2d88de67793063ad5f5e923ffd1c0eb">Domain::FromValues</a>(possible_indices))) {</div><div class="line"><a name="l02872"></a><span class="lineno"> 2872</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l02873"></a><span class="lineno"> 2873</span>  }</div><div class="line"><a name="l02874"></a><span class="lineno"> 2874</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(</div><div class="line"><a name="l02875"></a><span class="lineno"> 2875</span>  <span class="stringliteral">"element: reduced index domain when target equals index"</span>);</div><div class="line"><a name="l02876"></a><span class="lineno"> 2876</span>  }</div><div class="line"><a name="l02877"></a><span class="lineno"> 2877</span>  }</div><div class="line"><a name="l02878"></a><span class="lineno"> 2878</span> </div><div class="line"><a name="l02879"></a><span class="lineno"> 2879</span>  <span class="comment">// Filter possible index values. Accumulate variable domains to build</span></div><div class="line"><a name="l02880"></a><span class="lineno"> 2880</span>  <span class="comment">// a possible target domain.</span></div><div class="line"><a name="l02881"></a><span class="lineno"> 2881</span>  Domain infered_domain;</div><div class="line"><a name="l02882"></a><span class="lineno"> 2882</span>  <span class="keyword">const</span> Domain& initial_index_domain = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(index_ref);</div><div class="line"><a name="l02883"></a><span class="lineno"> 2883</span>  <span class="keyword">const</span> Domain& target_domain = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(target_ref);</div><div class="line"><a name="l02884"></a><span class="lineno"> 2884</span>  std::vector<int64_t> possible_indices;</div><div class="line"><a name="l02885"></a><span class="lineno"> 2885</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> int64_t <a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a> : initial_index_domain.Values()) {</div><div class="line"><a name="l02886"></a><span class="lineno"> 2886</span>  <a class="code" href="base_2logging_8h.html#a7cc25402ecd7591b4c39934dd656b1f9">CHECK_GE</a>(<a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a>, 0);</div><div class="line"><a name="l02887"></a><span class="lineno"> 2887</span>  <a class="code" href="base_2logging_8h.html#a4bd2e815ca2f702a4b6aa744b1ff3b82">CHECK_LT</a>(<a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a>, <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->element().vars_size());</div><div class="line"><a name="l02888"></a><span class="lineno"> 2888</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> ref = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->element().vars(<a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a>);</div><div class="line"><a name="l02889"></a><span class="lineno"> 2889</span>  <span class="keyword">const</span> Domain& domain = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(ref);</div><div class="line"><a name="l02890"></a><span class="lineno"> 2890</span>  <span class="keywordflow">if</span> (domain.IntersectionWith(target_domain).IsEmpty()) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l02891"></a><span class="lineno"> 2891</span>  possible_indices.push_back(<a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a>);</div><div class="line"><a name="l02892"></a><span class="lineno"> 2892</span>  <span class="keywordflow">if</span> (domain.IsFixed()) {</div><div class="line"><a name="l02893"></a><span class="lineno"> 2893</span>  constant_set.insert(domain.Min());</div><div class="line"><a name="l02894"></a><span class="lineno"> 2894</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l02895"></a><span class="lineno"> 2895</span>  all_constants = <span class="keyword">false</span>;</div><div class="line"><a name="l02896"></a><span class="lineno"> 2896</span>  }</div><div class="line"><a name="l02897"></a><span class="lineno"> 2897</span>  <span class="keywordflow">if</span> (!domain.IsIncludedIn(target_domain)) {</div><div class="line"><a name="l02898"></a><span class="lineno"> 2898</span>  all_included_in_target_domain = <span class="keyword">false</span>;</div><div class="line"><a name="l02899"></a><span class="lineno"> 2899</span>  }</div><div class="line"><a name="l02900"></a><span class="lineno"> 2900</span>  infered_domain = infered_domain.UnionWith(domain);</div><div class="line"><a name="l02901"></a><span class="lineno"> 2901</span>  }</div><div class="line"><a name="l02902"></a><span class="lineno"> 2902</span>  <span class="keywordflow">if</span> (possible_indices.size() < initial_index_domain.Size()) {</div><div class="line"><a name="l02903"></a><span class="lineno"> 2903</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(</div><div class="line"><a name="l02904"></a><span class="lineno"> 2904</span>  index_ref, <a class="code" href="classoperations__research_1_1_domain.html#ac2d88de67793063ad5f5e923ffd1c0eb">Domain::FromValues</a>(possible_indices))) {</div><div class="line"><a name="l02905"></a><span class="lineno"> 2905</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l02906"></a><span class="lineno"> 2906</span>  }</div><div class="line"><a name="l02907"></a><span class="lineno"> 2907</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"element: reduced index domain"</span>);</div><div class="line"><a name="l02908"></a><span class="lineno"> 2908</span>  }</div><div class="line"><a name="l02909"></a><span class="lineno"> 2909</span>  <span class="keywordtype">bool</span> domain_modified = <span class="keyword">false</span>;</div><div class="line"><a name="l02910"></a><span class="lineno"> 2910</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(target_ref, infered_domain,</div><div class="line"><a name="l02911"></a><span class="lineno"> 2911</span>  &domain_modified)) {</div><div class="line"><a name="l02912"></a><span class="lineno"> 2912</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l02913"></a><span class="lineno"> 2913</span>  }</div><div class="line"><a name="l02914"></a><span class="lineno"> 2914</span>  <span class="keywordflow">if</span> (domain_modified) {</div><div class="line"><a name="l02915"></a><span class="lineno"> 2915</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"element: reduced target domain"</span>);</div><div class="line"><a name="l02916"></a><span class="lineno"> 2916</span>  }</div><div class="line"><a name="l02917"></a><span class="lineno"> 2917</span>  }</div><div class="line"><a name="l02918"></a><span class="lineno"> 2918</span> </div><div class="line"><a name="l02919"></a><span class="lineno"> 2919</span>  <span class="comment">// If the index is fixed, this is a equality constraint.</span></div><div class="line"><a name="l02920"></a><span class="lineno"> 2920</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#abb6eb29f56c3a33b8ae1b74b08b755c2">IsFixed</a>(index_ref)) {</div><div class="line"><a name="l02921"></a><span class="lineno"> 2921</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->element().vars(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(index_ref));</div><div class="line"><a name="l02922"></a><span class="lineno"> 2922</span>  <span class="keywordflow">if</span> (<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> != target_ref) {</div><div class="line"><a name="l02923"></a><span class="lineno"> 2923</span>  LinearConstraintProto* <span class="keyword">const</span> lin =</div><div class="line"><a name="l02924"></a><span class="lineno"> 2924</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>()-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ad653c55b371ae98444295965c6622ddb">mutable_linear</a>();</div><div class="line"><a name="l02925"></a><span class="lineno"> 2925</span>  lin-><a class="code" href="classoperations__research_1_1sat_1_1_linear_constraint_proto.html#aecb2bc94116e771000e5be7f8e3a7f6c">add_vars</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l02926"></a><span class="lineno"> 2926</span>  lin->add_coeffs(-1);</div><div class="line"><a name="l02927"></a><span class="lineno"> 2927</span>  lin->add_vars(target_ref);</div><div class="line"><a name="l02928"></a><span class="lineno"> 2928</span>  lin->add_coeffs(1);</div><div class="line"><a name="l02929"></a><span class="lineno"> 2929</span>  lin->add_domain(0);</div><div class="line"><a name="l02930"></a><span class="lineno"> 2930</span>  lin->add_domain(0);</div><div class="line"><a name="l02931"></a><span class="lineno"> 2931</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l02932"></a><span class="lineno"> 2932</span>  }</div><div class="line"><a name="l02933"></a><span class="lineno"> 2933</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"element: fixed index"</span>);</div><div class="line"><a name="l02934"></a><span class="lineno"> 2934</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l02935"></a><span class="lineno"> 2935</span>  }</div><div class="line"><a name="l02936"></a><span class="lineno"> 2936</span> </div><div class="line"><a name="l02937"></a><span class="lineno"> 2937</span>  <span class="comment">// If the accessible part of the array is made of a single constant value,</span></div><div class="line"><a name="l02938"></a><span class="lineno"> 2938</span>  <span class="comment">// then we do not care about the index. And, because of the previous target</span></div><div class="line"><a name="l02939"></a><span class="lineno"> 2939</span>  <span class="comment">// domain reduction, the target is also fixed.</span></div><div class="line"><a name="l02940"></a><span class="lineno"> 2940</span>  <span class="keywordflow">if</span> (all_constants && constant_set.size() == 1) {</div><div class="line"><a name="l02941"></a><span class="lineno"> 2941</span>  <a class="code" href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a>(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#abb6eb29f56c3a33b8ae1b74b08b755c2">IsFixed</a>(target_ref));</div><div class="line"><a name="l02942"></a><span class="lineno"> 2942</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"element: one value array"</span>);</div><div class="line"><a name="l02943"></a><span class="lineno"> 2943</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l02944"></a><span class="lineno"> 2944</span>  }</div><div class="line"><a name="l02945"></a><span class="lineno"> 2945</span> </div><div class="line"><a name="l02946"></a><span class="lineno"> 2946</span>  <span class="comment">// Special case when the index is boolean, and the array does not contain</span></div><div class="line"><a name="l02947"></a><span class="lineno"> 2947</span>  <span class="comment">// variables.</span></div><div class="line"><a name="l02948"></a><span class="lineno"> 2948</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(index_ref) == 0 && context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a00f995618e00d575372ff823a12553a9">MaxOf</a>(index_ref) == 1 &&</div><div class="line"><a name="l02949"></a><span class="lineno"> 2949</span>  all_constants) {</div><div class="line"><a name="l02950"></a><span class="lineno"> 2950</span>  <span class="keyword">const</span> int64_t v0 = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->element().vars(0));</div><div class="line"><a name="l02951"></a><span class="lineno"> 2951</span>  <span class="keyword">const</span> int64_t v1 = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->element().vars(1));</div><div class="line"><a name="l02952"></a><span class="lineno"> 2952</span> </div><div class="line"><a name="l02953"></a><span class="lineno"> 2953</span>  LinearConstraintProto* <span class="keyword">const</span> lin =</div><div class="line"><a name="l02954"></a><span class="lineno"> 2954</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>()-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ad653c55b371ae98444295965c6622ddb">mutable_linear</a>();</div><div class="line"><a name="l02955"></a><span class="lineno"> 2955</span>  lin-><a class="code" href="classoperations__research_1_1sat_1_1_linear_constraint_proto.html#aecb2bc94116e771000e5be7f8e3a7f6c">add_vars</a>(target_ref);</div><div class="line"><a name="l02956"></a><span class="lineno"> 2956</span>  lin->add_coeffs(1);</div><div class="line"><a name="l02957"></a><span class="lineno"> 2957</span>  lin->add_vars(index_ref);</div><div class="line"><a name="l02958"></a><span class="lineno"> 2958</span>  lin->add_coeffs(v0 - v1);</div><div class="line"><a name="l02959"></a><span class="lineno"> 2959</span>  lin->add_domain(v0);</div><div class="line"><a name="l02960"></a><span class="lineno"> 2960</span>  lin->add_domain(v0);</div><div class="line"><a name="l02961"></a><span class="lineno"> 2961</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l02962"></a><span class="lineno"> 2962</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"element: linearize constant element of size 2"</span>);</div><div class="line"><a name="l02963"></a><span class="lineno"> 2963</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l02964"></a><span class="lineno"> 2964</span>  }</div><div class="line"><a name="l02965"></a><span class="lineno"> 2965</span> </div><div class="line"><a name="l02966"></a><span class="lineno"> 2966</span>  <span class="comment">// If the index has a canonical affine representative, rewrite the element.</span></div><div class="line"><a name="l02967"></a><span class="lineno"> 2967</span>  <span class="keyword">const</span> AffineRelation::Relation r_index =</div><div class="line"><a name="l02968"></a><span class="lineno"> 2968</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aaddc5f58e8a40a5a308531949153f814">GetAffineRelation</a>(index_ref);</div><div class="line"><a name="l02969"></a><span class="lineno"> 2969</span>  <span class="keywordflow">if</span> (r_index.representative != index_ref) {</div><div class="line"><a name="l02970"></a><span class="lineno"> 2970</span>  <span class="comment">// Checks the domains are synchronized.</span></div><div class="line"><a name="l02971"></a><span class="lineno"> 2971</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(r_index.representative).<a class="code" href="classoperations__research_1_1_domain.html#a572bd92c25ebc67c72137fd59e53f6d6">Size</a>() ></div><div class="line"><a name="l02972"></a><span class="lineno"> 2972</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(index_ref).<a class="code" href="classoperations__research_1_1_domain.html#a572bd92c25ebc67c72137fd59e53f6d6">Size</a>()) {</div><div class="line"><a name="l02973"></a><span class="lineno"> 2973</span>  <span class="comment">// Postpone, we will come back later when domains are synchronized.</span></div><div class="line"><a name="l02974"></a><span class="lineno"> 2974</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l02975"></a><span class="lineno"> 2975</span>  }</div><div class="line"><a name="l02976"></a><span class="lineno"> 2976</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> r_ref = r_index.<a class="code" href="structoperations__research_1_1_affine_relation_1_1_relation.html#af5eb1e0745f18d589b9c552215bef515">representative</a>;</div><div class="line"><a name="l02977"></a><span class="lineno"> 2977</span>  <span class="keyword">const</span> int64_t r_min = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(r_ref);</div><div class="line"><a name="l02978"></a><span class="lineno"> 2978</span>  <span class="keyword">const</span> int64_t r_max = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a00f995618e00d575372ff823a12553a9">MaxOf</a>(r_ref);</div><div class="line"><a name="l02979"></a><span class="lineno"> 2979</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> array_size = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->element().vars_size();</div><div class="line"><a name="l02980"></a><span class="lineno"> 2980</span>  <span class="keywordflow">if</span> (r_min != 0) {</div><div class="line"><a name="l02981"></a><span class="lineno"> 2981</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"TODO element: representative has bad domain"</span>);</div><div class="line"><a name="l02982"></a><span class="lineno"> 2982</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (r_index.offset >= 0 && r_index.offset < array_size &&</div><div class="line"><a name="l02983"></a><span class="lineno"> 2983</span>  r_index.offset + r_max * r_index.coeff >= 0 &&</div><div class="line"><a name="l02984"></a><span class="lineno"> 2984</span>  r_index.offset + r_max * r_index.coeff < array_size) {</div><div class="line"><a name="l02985"></a><span class="lineno"> 2985</span>  <span class="comment">// This will happen eventually when domains are synchronized.</span></div><div class="line"><a name="l02986"></a><span class="lineno"> 2986</span>  ElementConstraintProto* <span class="keyword">const</span> element =</div><div class="line"><a name="l02987"></a><span class="lineno"> 2987</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>()-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a2563b062d2ed99c7b1f9bf8235b9e8fe">mutable_element</a>();</div><div class="line"><a name="l02988"></a><span class="lineno"> 2988</span>  <span class="keywordflow">for</span> (int64_t v = 0; v <= r_max; ++v) {</div><div class="line"><a name="l02989"></a><span class="lineno"> 2989</span>  <span class="keyword">const</span> int64_t scaled_index = v * r_index.coeff + r_index.offset;</div><div class="line"><a name="l02990"></a><span class="lineno"> 2990</span>  <a class="code" href="base_2logging_8h.html#a7cc25402ecd7591b4c39934dd656b1f9">CHECK_GE</a>(scaled_index, 0);</div><div class="line"><a name="l02991"></a><span class="lineno"> 2991</span>  <a class="code" href="base_2logging_8h.html#a4bd2e815ca2f702a4b6aa744b1ff3b82">CHECK_LT</a>(scaled_index, array_size);</div><div class="line"><a name="l02992"></a><span class="lineno"> 2992</span>  element->add_vars(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->element().vars(scaled_index));</div><div class="line"><a name="l02993"></a><span class="lineno"> 2993</span>  }</div><div class="line"><a name="l02994"></a><span class="lineno"> 2994</span>  element->set_index(r_ref);</div><div class="line"><a name="l02995"></a><span class="lineno"> 2995</span>  element->set_target(target_ref);</div><div class="line"><a name="l02996"></a><span class="lineno"> 2996</span> </div><div class="line"><a name="l02997"></a><span class="lineno"> 2997</span>  <span class="keywordflow">if</span> (r_index.coeff == 1) {</div><div class="line"><a name="l02998"></a><span class="lineno"> 2998</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"element: shifed index "</span>);</div><div class="line"><a name="l02999"></a><span class="lineno"> 2999</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l03000"></a><span class="lineno"> 3000</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"element: scaled index"</span>);</div><div class="line"><a name="l03001"></a><span class="lineno"> 3001</span>  }</div><div class="line"><a name="l03002"></a><span class="lineno"> 3002</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l03003"></a><span class="lineno"> 3003</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l03004"></a><span class="lineno"> 3004</span>  }</div><div class="line"><a name="l03005"></a><span class="lineno"> 3005</span>  }</div><div class="line"><a name="l03006"></a><span class="lineno"> 3006</span> </div><div class="line"><a name="l03007"></a><span class="lineno"> 3007</span>  <span class="comment">// Should have been taken care of ealier.</span></div><div class="line"><a name="l03008"></a><span class="lineno"> 3008</span>  <a class="code" href="base_2logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a>(!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#abb6eb29f56c3a33b8ae1b74b08b755c2">IsFixed</a>(index_ref));</div><div class="line"><a name="l03009"></a><span class="lineno"> 3009</span> </div><div class="line"><a name="l03010"></a><span class="lineno"> 3010</span>  <span class="comment">// If a variable (target or index) appears only in this constraint, it does</span></div><div class="line"><a name="l03011"></a><span class="lineno"> 3011</span>  <span class="comment">// not necessarily mean that we can remove the constraint, as the variable</span></div><div class="line"><a name="l03012"></a><span class="lineno"> 3012</span>  <span class="comment">// can be used multiple times in the element. So let's count the local uses of</span></div><div class="line"><a name="l03013"></a><span class="lineno"> 3013</span>  <span class="comment">// each variable.</span></div><div class="line"><a name="l03014"></a><span class="lineno"> 3014</span>  absl::flat_hash_map<int, int> local_var_occurrence_counter;</div><div class="line"><a name="l03015"></a><span class="lineno"> 3015</span>  local_var_occurrence_counter[<a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(index_ref)]++;</div><div class="line"><a name="l03016"></a><span class="lineno"> 3016</span>  local_var_occurrence_counter[<a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(target_ref)]++;</div><div class="line"><a name="l03017"></a><span class="lineno"> 3017</span> </div><div class="line"><a name="l03018"></a><span class="lineno"> 3018</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> ClosedInterval <a class="code" href="resource_8cc.html#af92a8383a05fdf586a52263d358f5ada">interval</a> : context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(index_ref)) {</div><div class="line"><a name="l03019"></a><span class="lineno"> 3019</span>  <span class="keywordflow">for</span> (int64_t <a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a> = <a class="code" href="resource_8cc.html#af92a8383a05fdf586a52263d358f5ada">interval</a>.start; <a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a> <= <a class="code" href="resource_8cc.html#af92a8383a05fdf586a52263d358f5ada">interval</a>.end; ++<a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a>) {</div><div class="line"><a name="l03020"></a><span class="lineno"> 3020</span>  <a class="code" href="base_2logging_8h.html#aae2dc65d9ea248d54bf39daa986dd295">DCHECK_GE</a>(<a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a>, 0);</div><div class="line"><a name="l03021"></a><span class="lineno"> 3021</span>  <a class="code" href="base_2logging_8h.html#ab62f5ed8f2d48e29802be0cbbcd1359a">DCHECK_LT</a>(<a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a>, <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->element().vars_size());</div><div class="line"><a name="l03022"></a><span class="lineno"> 3022</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> ref = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->element().vars(<a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a>);</div><div class="line"><a name="l03023"></a><span class="lineno"> 3023</span>  local_var_occurrence_counter[<a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(ref)]++;</div><div class="line"><a name="l03024"></a><span class="lineno"> 3024</span>  }</div><div class="line"><a name="l03025"></a><span class="lineno"> 3025</span>  }</div><div class="line"><a name="l03026"></a><span class="lineno"> 3026</span> </div><div class="line"><a name="l03027"></a><span class="lineno"> 3027</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a54cf7f0077717d59a828b656b60c1615">VariableIsUniqueAndRemovable</a>(index_ref) &&</div><div class="line"><a name="l03028"></a><span class="lineno"> 3028</span>  local_var_occurrence_counter.at(<a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(index_ref)) == 1) {</div><div class="line"><a name="l03029"></a><span class="lineno"> 3029</span>  <span class="keywordflow">if</span> (all_constants) {</div><div class="line"><a name="l03030"></a><span class="lineno"> 3030</span>  <span class="comment">// This constraint is just here to reduce the domain of the target! We can</span></div><div class="line"><a name="l03031"></a><span class="lineno"> 3031</span>  <span class="comment">// add it to the mapping_model to reconstruct the index value during</span></div><div class="line"><a name="l03032"></a><span class="lineno"> 3032</span>  <span class="comment">// postsolve and get rid of it now.</span></div><div class="line"><a name="l03033"></a><span class="lineno"> 3033</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"element: trivial target domain reduction"</span>);</div><div class="line"><a name="l03034"></a><span class="lineno"> 3034</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a6939dc7b9db01cf3deff10405e260461">MarkVariableAsRemoved</a>(index_ref);</div><div class="line"><a name="l03035"></a><span class="lineno"> 3035</span>  *(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a4b3b9ef9c5f214dd4427daa2646eceda">mapping_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>()) = *<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>;</div><div class="line"><a name="l03036"></a><span class="lineno"> 3036</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l03037"></a><span class="lineno"> 3037</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l03038"></a><span class="lineno"> 3038</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"TODO element: index not used elsewhere"</span>);</div><div class="line"><a name="l03039"></a><span class="lineno"> 3039</span>  }</div><div class="line"><a name="l03040"></a><span class="lineno"> 3040</span>  }</div><div class="line"><a name="l03041"></a><span class="lineno"> 3041</span> </div><div class="line"><a name="l03042"></a><span class="lineno"> 3042</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#abb6eb29f56c3a33b8ae1b74b08b755c2">IsFixed</a>(target_ref) &&</div><div class="line"><a name="l03043"></a><span class="lineno"> 3043</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a54cf7f0077717d59a828b656b60c1615">VariableIsUniqueAndRemovable</a>(target_ref) &&</div><div class="line"><a name="l03044"></a><span class="lineno"> 3044</span>  local_var_occurrence_counter.at(<a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(target_ref)) == 1) {</div><div class="line"><a name="l03045"></a><span class="lineno"> 3045</span>  <span class="keywordflow">if</span> (all_included_in_target_domain) {</div><div class="line"><a name="l03046"></a><span class="lineno"> 3046</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"element: trivial index domain reduction"</span>);</div><div class="line"><a name="l03047"></a><span class="lineno"> 3047</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a6939dc7b9db01cf3deff10405e260461">MarkVariableAsRemoved</a>(target_ref);</div><div class="line"><a name="l03048"></a><span class="lineno"> 3048</span>  *(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a4b3b9ef9c5f214dd4427daa2646eceda">mapping_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>()) = *<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>;</div><div class="line"><a name="l03049"></a><span class="lineno"> 3049</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l03050"></a><span class="lineno"> 3050</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l03051"></a><span class="lineno"> 3051</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"TODO element: target not used elsewhere"</span>);</div><div class="line"><a name="l03052"></a><span class="lineno"> 3052</span>  }</div><div class="line"><a name="l03053"></a><span class="lineno"> 3053</span>  }</div><div class="line"><a name="l03054"></a><span class="lineno"> 3054</span> </div><div class="line"><a name="l03055"></a><span class="lineno"> 3055</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l03056"></a><span class="lineno"> 3056</span> }</div><div class="line"><a name="l03057"></a><span class="lineno"> 3057</span> </div><div class="line"><a name="l03058"></a><span class="lineno"> 3058</span> <span class="keywordtype">bool</span> CpModelPresolver::PresolveTable(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l03059"></a><span class="lineno"> 3059</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l03060"></a><span class="lineno"> 3060</span>  <span class="keywordflow">if</span> (<a class="code" href="namespaceoperations__research_1_1sat.html#a42a3b266d8c6dfab1c14baa6c04e2333">HasEnforcementLiteral</a>(*<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l03061"></a><span class="lineno"> 3061</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->table().vars().empty()) {</div><div class="line"><a name="l03062"></a><span class="lineno"> 3062</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"table: empty constraint"</span>);</div><div class="line"><a name="l03063"></a><span class="lineno"> 3063</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l03064"></a><span class="lineno"> 3064</span>  }</div><div class="line"><a name="l03065"></a><span class="lineno"> 3065</span> </div><div class="line"><a name="l03066"></a><span class="lineno"> 3066</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> initial_num_vars = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->table().vars_size();</div><div class="line"><a name="l03067"></a><span class="lineno"> 3067</span>  <span class="keywordtype">bool</span> changed = <span class="keyword">true</span>;</div><div class="line"><a name="l03068"></a><span class="lineno"> 3068</span> </div><div class="line"><a name="l03069"></a><span class="lineno"> 3069</span>  <span class="comment">// Query existing affine relations.</span></div><div class="line"><a name="l03070"></a><span class="lineno"> 3070</span>  std::vector<AffineRelation::Relation> affine_relations;</div><div class="line"><a name="l03071"></a><span class="lineno"> 3071</span>  std::vector<int64_t> old_var_lb;</div><div class="line"><a name="l03072"></a><span class="lineno"> 3072</span>  std::vector<int64_t> old_var_ub;</div><div class="line"><a name="l03073"></a><span class="lineno"> 3073</span>  {</div><div class="line"><a name="l03074"></a><span class="lineno"> 3074</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> v = 0; v < initial_num_vars; ++v) {</div><div class="line"><a name="l03075"></a><span class="lineno"> 3075</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> ref = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->table().vars(v);</div><div class="line"><a name="l03076"></a><span class="lineno"> 3076</span>  AffineRelation::Relation r = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aaddc5f58e8a40a5a308531949153f814">GetAffineRelation</a>(ref);</div><div class="line"><a name="l03077"></a><span class="lineno"> 3077</span>  affine_relations.push_back(r);</div><div class="line"><a name="l03078"></a><span class="lineno"> 3078</span>  old_var_lb.push_back(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(ref));</div><div class="line"><a name="l03079"></a><span class="lineno"> 3079</span>  old_var_ub.push_back(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a00f995618e00d575372ff823a12553a9">MaxOf</a>(ref));</div><div class="line"><a name="l03080"></a><span class="lineno"> 3080</span>  <span class="keywordflow">if</span> (r.representative != ref) {</div><div class="line"><a name="l03081"></a><span class="lineno"> 3081</span>  changed = <span class="keyword">true</span>;</div><div class="line"><a name="l03082"></a><span class="lineno"> 3082</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_table()->set_vars(v, r.representative);</div><div class="line"><a name="l03083"></a><span class="lineno"> 3083</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(</div><div class="line"><a name="l03084"></a><span class="lineno"> 3084</span>  <span class="stringliteral">"table: replace variable by canonical affine one"</span>);</div><div class="line"><a name="l03085"></a><span class="lineno"> 3085</span>  }</div><div class="line"><a name="l03086"></a><span class="lineno"> 3086</span>  }</div><div class="line"><a name="l03087"></a><span class="lineno"> 3087</span>  }</div><div class="line"><a name="l03088"></a><span class="lineno"> 3088</span> </div><div class="line"><a name="l03089"></a><span class="lineno"> 3089</span>  <span class="comment">// Check for duplicate occurrences of variables.</span></div><div class="line"><a name="l03090"></a><span class="lineno"> 3090</span>  <span class="comment">// If the ith index is -1, then the variable is not a duplicate of a smaller</span></div><div class="line"><a name="l03091"></a><span class="lineno"> 3091</span>  <span class="comment">// index variable. It if is != from -1, then the values stored is the new</span></div><div class="line"><a name="l03092"></a><span class="lineno"> 3092</span>  <span class="comment">// index of the first occurrence of the variable.</span></div><div class="line"><a name="l03093"></a><span class="lineno"> 3093</span>  std::vector<int> old_index_of_duplicate_to_new_index_of_first_occurrence(</div><div class="line"><a name="l03094"></a><span class="lineno"> 3094</span>  initial_num_vars, -1);</div><div class="line"><a name="l03095"></a><span class="lineno"> 3095</span>  <span class="comment">// If == -1, then the variable is a duplicate of a smaller index variable.</span></div><div class="line"><a name="l03096"></a><span class="lineno"> 3096</span>  std::vector<int> old_index_to_new_index(initial_num_vars, -1);</div><div class="line"><a name="l03097"></a><span class="lineno"> 3097</span>  <span class="keywordtype">int</span> num_vars = 0;</div><div class="line"><a name="l03098"></a><span class="lineno"> 3098</span>  {</div><div class="line"><a name="l03099"></a><span class="lineno"> 3099</span>  absl::flat_hash_map<int, int> first_visit;</div><div class="line"><a name="l03100"></a><span class="lineno"> 3100</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> p = 0; p < initial_num_vars; ++p) {</div><div class="line"><a name="l03101"></a><span class="lineno"> 3101</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> ref = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->table().vars(p);</div><div class="line"><a name="l03102"></a><span class="lineno"> 3102</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = <a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(ref);</div><div class="line"><a name="l03103"></a><span class="lineno"> 3103</span>  <span class="keyword">const</span> <span class="keyword">auto</span>& it = first_visit.find(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l03104"></a><span class="lineno"> 3104</span>  <span class="keywordflow">if</span> (it != first_visit.end()) {</div><div class="line"><a name="l03105"></a><span class="lineno"> 3105</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> previous = it->second;</div><div class="line"><a name="l03106"></a><span class="lineno"> 3106</span>  old_index_of_duplicate_to_new_index_of_first_occurrence[p] = previous;</div><div class="line"><a name="l03107"></a><span class="lineno"> 3107</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"table: duplicate variables"</span>);</div><div class="line"><a name="l03108"></a><span class="lineno"> 3108</span>  changed = <span class="keyword">true</span>;</div><div class="line"><a name="l03109"></a><span class="lineno"> 3109</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l03110"></a><span class="lineno"> 3110</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_table()->set_vars(num_vars, ref);</div><div class="line"><a name="l03111"></a><span class="lineno"> 3111</span>  first_visit[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>] = num_vars;</div><div class="line"><a name="l03112"></a><span class="lineno"> 3112</span>  old_index_to_new_index[p] = num_vars;</div><div class="line"><a name="l03113"></a><span class="lineno"> 3113</span>  num_vars++;</div><div class="line"><a name="l03114"></a><span class="lineno"> 3114</span>  }</div><div class="line"><a name="l03115"></a><span class="lineno"> 3115</span>  }</div><div class="line"><a name="l03116"></a><span class="lineno"> 3116</span> </div><div class="line"><a name="l03117"></a><span class="lineno"> 3117</span>  <span class="keywordflow">if</span> (num_vars < initial_num_vars) {</div><div class="line"><a name="l03118"></a><span class="lineno"> 3118</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_table()->mutable_vars()->Truncate(num_vars);</div><div class="line"><a name="l03119"></a><span class="lineno"> 3119</span>  }</div><div class="line"><a name="l03120"></a><span class="lineno"> 3120</span>  }</div><div class="line"><a name="l03121"></a><span class="lineno"> 3121</span> </div><div class="line"><a name="l03122"></a><span class="lineno"> 3122</span>  <span class="comment">// Check each tuple for validity w.r.t. affine relations, variable domains,</span></div><div class="line"><a name="l03123"></a><span class="lineno"> 3123</span>  <span class="comment">// and consistency with duplicate variables. Reduce the size of the tuple in</span></div><div class="line"><a name="l03124"></a><span class="lineno"> 3124</span>  <span class="comment">// case of duplicate variables.</span></div><div class="line"><a name="l03125"></a><span class="lineno"> 3125</span>  std::vector<std::vector<int64_t>> new_tuples;</div><div class="line"><a name="l03126"></a><span class="lineno"> 3126</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> initial_num_tuples = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->table().values_size() / initial_num_vars;</div><div class="line"><a name="l03127"></a><span class="lineno"> 3127</span>  std::vector<absl::flat_hash_set<int64_t>> new_domains(num_vars);</div><div class="line"><a name="l03128"></a><span class="lineno"> 3128</span> </div><div class="line"><a name="l03129"></a><span class="lineno"> 3129</span>  {</div><div class="line"><a name="l03130"></a><span class="lineno"> 3130</span>  std::vector<int64_t> tuple(num_vars);</div><div class="line"><a name="l03131"></a><span class="lineno"> 3131</span>  new_tuples.reserve(initial_num_tuples);</div><div class="line"><a name="l03132"></a><span class="lineno"> 3132</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < initial_num_tuples; ++i) {</div><div class="line"><a name="l03133"></a><span class="lineno"> 3133</span>  <span class="keywordtype">bool</span> delete_row = <span class="keyword">false</span>;</div><div class="line"><a name="l03134"></a><span class="lineno"> 3134</span>  std::string tmp;</div><div class="line"><a name="l03135"></a><span class="lineno"> 3135</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j < initial_num_vars; ++j) {</div><div class="line"><a name="l03136"></a><span class="lineno"> 3136</span>  <span class="keyword">const</span> int64_t old_value = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->table().values(i * initial_num_vars + j);</div><div class="line"><a name="l03137"></a><span class="lineno"> 3137</span> </div><div class="line"><a name="l03138"></a><span class="lineno"> 3138</span>  <span class="comment">// Corner case to avoid overflow, assuming the domain where already</span></div><div class="line"><a name="l03139"></a><span class="lineno"> 3139</span>  <span class="comment">// propagated between a variable and its affine representative.</span></div><div class="line"><a name="l03140"></a><span class="lineno"> 3140</span>  <span class="keywordflow">if</span> (old_value < old_var_lb[j] || old_value > old_var_ub[j]) {</div><div class="line"><a name="l03141"></a><span class="lineno"> 3141</span>  delete_row = <span class="keyword">true</span>;</div><div class="line"><a name="l03142"></a><span class="lineno"> 3142</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l03143"></a><span class="lineno"> 3143</span>  }</div><div class="line"><a name="l03144"></a><span class="lineno"> 3144</span> </div><div class="line"><a name="l03145"></a><span class="lineno"> 3145</span>  <span class="comment">// Affine relations are defined on the initial variables.</span></div><div class="line"><a name="l03146"></a><span class="lineno"> 3146</span>  <span class="keyword">const</span> AffineRelation::Relation& r = affine_relations[j];</div><div class="line"><a name="l03147"></a><span class="lineno"> 3147</span>  <span class="keyword">const</span> int64_t <a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a> = (old_value - r.offset) / r.coeff;</div><div class="line"><a name="l03148"></a><span class="lineno"> 3148</span>  <a class="code" href="parser_8yy_8cc.html#a33e91cd0cef6786e9e3a27ac67707207">if</a> (<a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a> * r.coeff + r.offset != old_value) {</div><div class="line"><a name="l03149"></a><span class="lineno"> 3149</span>  <span class="comment">// Value not reachable by affine relation.</span></div><div class="line"><a name="l03150"></a><span class="lineno"> 3150</span>  delete_row = <span class="keyword">true</span>;</div><div class="line"><a name="l03151"></a><span class="lineno"> 3151</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l03152"></a><span class="lineno"> 3152</span>  }</div><div class="line"><a name="l03153"></a><span class="lineno"> 3153</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> mapped_position = old_index_to_new_index[j];</div><div class="line"><a name="l03154"></a><span class="lineno"> 3154</span>  <span class="keywordflow">if</span> (mapped_position == -1) { <span class="comment">// The current variable is duplicate.</span></div><div class="line"><a name="l03155"></a><span class="lineno"> 3155</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> new_index_of_first_occurrence =</div><div class="line"><a name="l03156"></a><span class="lineno"> 3156</span>  old_index_of_duplicate_to_new_index_of_first_occurrence[j];</div><div class="line"><a name="l03157"></a><span class="lineno"> 3157</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a> != tuple[new_index_of_first_occurrence]) {</div><div class="line"><a name="l03158"></a><span class="lineno"> 3158</span>  delete_row = <span class="keyword">true</span>;</div><div class="line"><a name="l03159"></a><span class="lineno"> 3159</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l03160"></a><span class="lineno"> 3160</span>  }</div><div class="line"><a name="l03161"></a><span class="lineno"> 3161</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l03162"></a><span class="lineno"> 3162</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> ref = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->table().vars(mapped_position);</div><div class="line"><a name="l03163"></a><span class="lineno"> 3163</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a9dd01897679ba54fca524a3b0b7d5612">DomainContains</a>(ref, <a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a>)) {</div><div class="line"><a name="l03164"></a><span class="lineno"> 3164</span>  delete_row = <span class="keyword">true</span>;</div><div class="line"><a name="l03165"></a><span class="lineno"> 3165</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l03166"></a><span class="lineno"> 3166</span>  }</div><div class="line"><a name="l03167"></a><span class="lineno"> 3167</span>  tuple[mapped_position] = <a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a>;</div><div class="line"><a name="l03168"></a><span class="lineno"> 3168</span>  }</div><div class="line"><a name="l03169"></a><span class="lineno"> 3169</span>  }</div><div class="line"><a name="l03170"></a><span class="lineno"> 3170</span>  <span class="keywordflow">if</span> (delete_row) {</div><div class="line"><a name="l03171"></a><span class="lineno"> 3171</span>  changed = <span class="keyword">true</span>;</div><div class="line"><a name="l03172"></a><span class="lineno"> 3172</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l03173"></a><span class="lineno"> 3173</span>  }</div><div class="line"><a name="l03174"></a><span class="lineno"> 3174</span>  new_tuples.push_back(tuple);</div><div class="line"><a name="l03175"></a><span class="lineno"> 3175</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j < num_vars; ++j) {</div><div class="line"><a name="l03176"></a><span class="lineno"> 3176</span>  new_domains[j].insert(tuple[j]);</div><div class="line"><a name="l03177"></a><span class="lineno"> 3177</span>  }</div><div class="line"><a name="l03178"></a><span class="lineno"> 3178</span>  }</div><div class="line"><a name="l03179"></a><span class="lineno"> 3179</span>  <a class="code" href="namespacegtl.html#a288a1dc92da5d3ad62d4bc4cec9e8b1d">gtl::STLSortAndRemoveDuplicates</a>(&new_tuples);</div><div class="line"><a name="l03180"></a><span class="lineno"> 3180</span>  <span class="keywordflow">if</span> (new_tuples.size() < initial_num_tuples) {</div><div class="line"><a name="l03181"></a><span class="lineno"> 3181</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"table: removed rows"</span>);</div><div class="line"><a name="l03182"></a><span class="lineno"> 3182</span>  }</div><div class="line"><a name="l03183"></a><span class="lineno"> 3183</span>  }</div><div class="line"><a name="l03184"></a><span class="lineno"> 3184</span> </div><div class="line"><a name="l03185"></a><span class="lineno"> 3185</span>  <span class="comment">// Update the list of tuples if needed.</span></div><div class="line"><a name="l03186"></a><span class="lineno"> 3186</span>  <span class="keywordflow">if</span> (changed) {</div><div class="line"><a name="l03187"></a><span class="lineno"> 3187</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_table()->clear_values();</div><div class="line"><a name="l03188"></a><span class="lineno"> 3188</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> std::vector<int64_t>& t : new_tuples) {</div><div class="line"><a name="l03189"></a><span class="lineno"> 3189</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> int64_t v : t) {</div><div class="line"><a name="l03190"></a><span class="lineno"> 3190</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_table()->add_values(v);</div><div class="line"><a name="l03191"></a><span class="lineno"> 3191</span>  }</div><div class="line"><a name="l03192"></a><span class="lineno"> 3192</span>  }</div><div class="line"><a name="l03193"></a><span class="lineno"> 3193</span>  }</div><div class="line"><a name="l03194"></a><span class="lineno"> 3194</span> </div><div class="line"><a name="l03195"></a><span class="lineno"> 3195</span>  <span class="comment">// Nothing more to do for negated tables.</span></div><div class="line"><a name="l03196"></a><span class="lineno"> 3196</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->table().negated()) <span class="keywordflow">return</span> changed;</div><div class="line"><a name="l03197"></a><span class="lineno"> 3197</span> </div><div class="line"><a name="l03198"></a><span class="lineno"> 3198</span>  <span class="comment">// Filter the variable domains.</span></div><div class="line"><a name="l03199"></a><span class="lineno"> 3199</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j < num_vars; ++j) {</div><div class="line"><a name="l03200"></a><span class="lineno"> 3200</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> ref = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->table().vars(j);</div><div class="line"><a name="l03201"></a><span class="lineno"> 3201</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(</div><div class="line"><a name="l03202"></a><span class="lineno"> 3202</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(ref),</div><div class="line"><a name="l03203"></a><span class="lineno"> 3203</span>  <a class="code" href="classoperations__research_1_1_domain.html#ac2d88de67793063ad5f5e923ffd1c0eb">Domain::FromValues</a>(std::vector<int64_t>(new_domains[j].begin(),</div><div class="line"><a name="l03204"></a><span class="lineno"> 3204</span>  new_domains[j].end())),</div><div class="line"><a name="l03205"></a><span class="lineno"> 3205</span>  &changed)) {</div><div class="line"><a name="l03206"></a><span class="lineno"> 3206</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l03207"></a><span class="lineno"> 3207</span>  }</div><div class="line"><a name="l03208"></a><span class="lineno"> 3208</span>  }</div><div class="line"><a name="l03209"></a><span class="lineno"> 3209</span>  <span class="keywordflow">if</span> (changed) {</div><div class="line"><a name="l03210"></a><span class="lineno"> 3210</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"table: reduced variable domains"</span>);</div><div class="line"><a name="l03211"></a><span class="lineno"> 3211</span>  }</div><div class="line"><a name="l03212"></a><span class="lineno"> 3212</span>  <span class="keywordflow">if</span> (num_vars == 1) {</div><div class="line"><a name="l03213"></a><span class="lineno"> 3213</span>  <span class="comment">// Now that we properly update the domain, we can remove the constraint.</span></div><div class="line"><a name="l03214"></a><span class="lineno"> 3214</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"table: only one column!"</span>);</div><div class="line"><a name="l03215"></a><span class="lineno"> 3215</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l03216"></a><span class="lineno"> 3216</span>  }</div><div class="line"><a name="l03217"></a><span class="lineno"> 3217</span> </div><div class="line"><a name="l03218"></a><span class="lineno"> 3218</span>  <span class="comment">// Check that the table is not complete or just here to exclude a few tuples.</span></div><div class="line"><a name="l03219"></a><span class="lineno"> 3219</span>  <span class="keywordtype">double</span> prod = 1.0;</div><div class="line"><a name="l03220"></a><span class="lineno"> 3220</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j < num_vars; ++j) prod *= new_domains[j].size();</div><div class="line"><a name="l03221"></a><span class="lineno"> 3221</span>  <span class="keywordflow">if</span> (prod == new_tuples.size()) {</div><div class="line"><a name="l03222"></a><span class="lineno"> 3222</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"table: all tuples!"</span>);</div><div class="line"><a name="l03223"></a><span class="lineno"> 3223</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l03224"></a><span class="lineno"> 3224</span>  }</div><div class="line"><a name="l03225"></a><span class="lineno"> 3225</span> </div><div class="line"><a name="l03226"></a><span class="lineno"> 3226</span>  <span class="comment">// Convert to the negated table if we gain a lot of entries by doing so.</span></div><div class="line"><a name="l03227"></a><span class="lineno"> 3227</span>  <span class="comment">// Note however that currently the negated table do not propagate as much as</span></div><div class="line"><a name="l03228"></a><span class="lineno"> 3228</span>  <span class="comment">// it could.</span></div><div class="line"><a name="l03229"></a><span class="lineno"> 3229</span>  <span class="keywordflow">if</span> (new_tuples.size() > 0.7 * prod) {</div><div class="line"><a name="l03230"></a><span class="lineno"> 3230</span>  <span class="comment">// Enumerate all tuples.</span></div><div class="line"><a name="l03231"></a><span class="lineno"> 3231</span>  std::vector<std::vector<int64_t>> var_to_values(num_vars);</div><div class="line"><a name="l03232"></a><span class="lineno"> 3232</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j < num_vars; ++j) {</div><div class="line"><a name="l03233"></a><span class="lineno"> 3233</span>  var_to_values[j].assign(new_domains[j].begin(), new_domains[j].end());</div><div class="line"><a name="l03234"></a><span class="lineno"> 3234</span>  }</div><div class="line"><a name="l03235"></a><span class="lineno"> 3235</span>  std::vector<std::vector<int64_t>> all_tuples(prod);</div><div class="line"><a name="l03236"></a><span class="lineno"> 3236</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < prod; ++i) {</div><div class="line"><a name="l03237"></a><span class="lineno"> 3237</span>  all_tuples[i].resize(num_vars);</div><div class="line"><a name="l03238"></a><span class="lineno"> 3238</span>  <span class="keywordtype">int</span> <a class="code" href="pack_8cc.html#a750b5d744c39a06bfb13e6eb010e35d0">index</a> = i;</div><div class="line"><a name="l03239"></a><span class="lineno"> 3239</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j < num_vars; ++j) {</div><div class="line"><a name="l03240"></a><span class="lineno"> 3240</span>  all_tuples[i][j] = var_to_values[j][<a class="code" href="pack_8cc.html#a750b5d744c39a06bfb13e6eb010e35d0">index</a> % var_to_values[j].size()];</div><div class="line"><a name="l03241"></a><span class="lineno"> 3241</span>  <a class="code" href="pack_8cc.html#a750b5d744c39a06bfb13e6eb010e35d0">index</a> /= var_to_values[j].size();</div><div class="line"><a name="l03242"></a><span class="lineno"> 3242</span>  }</div><div class="line"><a name="l03243"></a><span class="lineno"> 3243</span>  }</div><div class="line"><a name="l03244"></a><span class="lineno"> 3244</span>  <a class="code" href="namespacegtl.html#a288a1dc92da5d3ad62d4bc4cec9e8b1d">gtl::STLSortAndRemoveDuplicates</a>(&all_tuples);</div><div class="line"><a name="l03245"></a><span class="lineno"> 3245</span> </div><div class="line"><a name="l03246"></a><span class="lineno"> 3246</span>  <span class="comment">// Compute the complement of new_tuples.</span></div><div class="line"><a name="l03247"></a><span class="lineno"> 3247</span>  std::vector<std::vector<int64_t>> diff(prod - new_tuples.size());</div><div class="line"><a name="l03248"></a><span class="lineno"> 3248</span>  std::set_difference(all_tuples.begin(), all_tuples.end(),</div><div class="line"><a name="l03249"></a><span class="lineno"> 3249</span>  new_tuples.begin(), new_tuples.end(), diff.begin());</div><div class="line"><a name="l03250"></a><span class="lineno"> 3250</span> </div><div class="line"><a name="l03251"></a><span class="lineno"> 3251</span>  <span class="comment">// Negate the constraint.</span></div><div class="line"><a name="l03252"></a><span class="lineno"> 3252</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_table()->set_negated(!<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->table().negated());</div><div class="line"><a name="l03253"></a><span class="lineno"> 3253</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_table()->clear_values();</div><div class="line"><a name="l03254"></a><span class="lineno"> 3254</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> std::vector<int64_t>& t : diff) {</div><div class="line"><a name="l03255"></a><span class="lineno"> 3255</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> int64_t v : t) <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_table()->add_values(v);</div><div class="line"><a name="l03256"></a><span class="lineno"> 3256</span>  }</div><div class="line"><a name="l03257"></a><span class="lineno"> 3257</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"table: negated"</span>);</div><div class="line"><a name="l03258"></a><span class="lineno"> 3258</span>  }</div><div class="line"><a name="l03259"></a><span class="lineno"> 3259</span>  <span class="keywordflow">return</span> changed;</div><div class="line"><a name="l03260"></a><span class="lineno"> 3260</span> }</div><div class="line"><a name="l03261"></a><span class="lineno"> 3261</span> </div><div class="line"><a name="l03262"></a><span class="lineno"> 3262</span> <span class="keywordtype">bool</span> CpModelPresolver::PresolveAllDiff(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l03263"></a><span class="lineno"> 3263</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l03264"></a><span class="lineno"> 3264</span>  <span class="keywordflow">if</span> (<a class="code" href="namespaceoperations__research_1_1sat.html#a42a3b266d8c6dfab1c14baa6c04e2333">HasEnforcementLiteral</a>(*<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l03265"></a><span class="lineno"> 3265</span> </div><div class="line"><a name="l03266"></a><span class="lineno"> 3266</span>  AllDifferentConstraintProto& all_diff = *<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_all_diff();</div><div class="line"><a name="l03267"></a><span class="lineno"> 3267</span> </div><div class="line"><a name="l03268"></a><span class="lineno"> 3268</span>  <span class="keywordtype">bool</span> constraint_has_changed = <span class="keyword">false</span>;</div><div class="line"><a name="l03269"></a><span class="lineno"> 3269</span>  <span class="keywordflow">for</span> (;;) {</div><div class="line"><a name="l03270"></a><span class="lineno"> 3270</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> size = all_diff.vars_size();</div><div class="line"><a name="l03271"></a><span class="lineno"> 3271</span>  <span class="keywordflow">if</span> (size == 0) {</div><div class="line"><a name="l03272"></a><span class="lineno"> 3272</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"all_diff: empty constraint"</span>);</div><div class="line"><a name="l03273"></a><span class="lineno"> 3273</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l03274"></a><span class="lineno"> 3274</span>  }</div><div class="line"><a name="l03275"></a><span class="lineno"> 3275</span>  <span class="keywordflow">if</span> (size == 1) {</div><div class="line"><a name="l03276"></a><span class="lineno"> 3276</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"all_diff: only one variable"</span>);</div><div class="line"><a name="l03277"></a><span class="lineno"> 3277</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l03278"></a><span class="lineno"> 3278</span>  }</div><div class="line"><a name="l03279"></a><span class="lineno"> 3279</span> </div><div class="line"><a name="l03280"></a><span class="lineno"> 3280</span>  <span class="keywordtype">bool</span> something_was_propagated = <span class="keyword">false</span>;</div><div class="line"><a name="l03281"></a><span class="lineno"> 3281</span>  std::vector<int> new_variables;</div><div class="line"><a name="l03282"></a><span class="lineno"> 3282</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < size; ++i) {</div><div class="line"><a name="l03283"></a><span class="lineno"> 3283</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#abb6eb29f56c3a33b8ae1b74b08b755c2">IsFixed</a>(all_diff.vars(i))) {</div><div class="line"><a name="l03284"></a><span class="lineno"> 3284</span>  new_variables.push_back(all_diff.vars(i));</div><div class="line"><a name="l03285"></a><span class="lineno"> 3285</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l03286"></a><span class="lineno"> 3286</span>  }</div><div class="line"><a name="l03287"></a><span class="lineno"> 3287</span> </div><div class="line"><a name="l03288"></a><span class="lineno"> 3288</span>  <span class="keyword">const</span> int64_t <a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a> = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(all_diff.vars(i));</div><div class="line"><a name="l03289"></a><span class="lineno"> 3289</span>  <span class="keywordtype">bool</span> propagated = <span class="keyword">false</span>;</div><div class="line"><a name="l03290"></a><span class="lineno"> 3290</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j < size; ++j) {</div><div class="line"><a name="l03291"></a><span class="lineno"> 3291</span>  <span class="keywordflow">if</span> (i == j) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l03292"></a><span class="lineno"> 3292</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a9dd01897679ba54fca524a3b0b7d5612">DomainContains</a>(all_diff.vars(j), <a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a>)) {</div><div class="line"><a name="l03293"></a><span class="lineno"> 3293</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(all_diff.vars(j),</div><div class="line"><a name="l03294"></a><span class="lineno"> 3294</span>  Domain(<a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a>).Complement())) {</div><div class="line"><a name="l03295"></a><span class="lineno"> 3295</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l03296"></a><span class="lineno"> 3296</span>  }</div><div class="line"><a name="l03297"></a><span class="lineno"> 3297</span>  propagated = <span class="keyword">true</span>;</div><div class="line"><a name="l03298"></a><span class="lineno"> 3298</span>  }</div><div class="line"><a name="l03299"></a><span class="lineno"> 3299</span>  }</div><div class="line"><a name="l03300"></a><span class="lineno"> 3300</span>  <span class="keywordflow">if</span> (propagated) {</div><div class="line"><a name="l03301"></a><span class="lineno"> 3301</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"all_diff: propagated fixed variables"</span>);</div><div class="line"><a name="l03302"></a><span class="lineno"> 3302</span>  something_was_propagated = <span class="keyword">true</span>;</div><div class="line"><a name="l03303"></a><span class="lineno"> 3303</span>  }</div><div class="line"><a name="l03304"></a><span class="lineno"> 3304</span>  }</div><div class="line"><a name="l03305"></a><span class="lineno"> 3305</span> </div><div class="line"><a name="l03306"></a><span class="lineno"> 3306</span>  std::sort(new_variables.begin(), new_variables.end());</div><div class="line"><a name="l03307"></a><span class="lineno"> 3307</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 1; i < new_variables.size(); ++i) {</div><div class="line"><a name="l03308"></a><span class="lineno"> 3308</span>  <span class="keywordflow">if</span> (new_variables[i] == new_variables[i - 1]) {</div><div class="line"><a name="l03309"></a><span class="lineno"> 3309</span>  <span class="keywordflow">return</span> context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5aa53538ba8adaa0bea1c3c0727425b0">NotifyThatModelIsUnsat</a>(</div><div class="line"><a name="l03310"></a><span class="lineno"> 3310</span>  <span class="stringliteral">"Duplicate variable in all_diff"</span>);</div><div class="line"><a name="l03311"></a><span class="lineno"> 3311</span>  }</div><div class="line"><a name="l03312"></a><span class="lineno"> 3312</span>  }</div><div class="line"><a name="l03313"></a><span class="lineno"> 3313</span> </div><div class="line"><a name="l03314"></a><span class="lineno"> 3314</span>  <span class="keywordflow">if</span> (new_variables.size() < all_diff.vars_size()) {</div><div class="line"><a name="l03315"></a><span class="lineno"> 3315</span>  all_diff.mutable_vars()->Clear();</div><div class="line"><a name="l03316"></a><span class="lineno"> 3316</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> : new_variables) {</div><div class="line"><a name="l03317"></a><span class="lineno"> 3317</span>  all_diff.add_vars(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l03318"></a><span class="lineno"> 3318</span>  }</div><div class="line"><a name="l03319"></a><span class="lineno"> 3319</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"all_diff: removed fixed variables"</span>);</div><div class="line"><a name="l03320"></a><span class="lineno"> 3320</span>  something_was_propagated = <span class="keyword">true</span>;</div><div class="line"><a name="l03321"></a><span class="lineno"> 3321</span>  constraint_has_changed = <span class="keyword">true</span>;</div><div class="line"><a name="l03322"></a><span class="lineno"> 3322</span>  <span class="keywordflow">if</span> (new_variables.size() <= 1) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l03323"></a><span class="lineno"> 3323</span>  }</div><div class="line"><a name="l03324"></a><span class="lineno"> 3324</span> </div><div class="line"><a name="l03325"></a><span class="lineno"> 3325</span>  <span class="comment">// Propagate mandatory value if the all diff is actually a permutation.</span></div><div class="line"><a name="l03326"></a><span class="lineno"> 3326</span>  <a class="code" href="base_2logging_8h.html#a7cc25402ecd7591b4c39934dd656b1f9">CHECK_GE</a>(all_diff.vars_size(), 2);</div><div class="line"><a name="l03327"></a><span class="lineno"> 3327</span>  Domain domain = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(all_diff.vars(0));</div><div class="line"><a name="l03328"></a><span class="lineno"> 3328</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 1; i < all_diff.vars_size(); ++i) {</div><div class="line"><a name="l03329"></a><span class="lineno"> 3329</span>  domain = domain.<a class="code" href="classoperations__research_1_1_domain.html#a5919f86aede74172b7fea05ebdb58975">UnionWith</a>(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(all_diff.vars(i)));</div><div class="line"><a name="l03330"></a><span class="lineno"> 3330</span>  }</div><div class="line"><a name="l03331"></a><span class="lineno"> 3331</span>  <span class="keywordflow">if</span> (all_diff.vars_size() == domain.Size()) {</div><div class="line"><a name="l03332"></a><span class="lineno"> 3332</span>  absl::flat_hash_map<int64_t, std::vector<int>> value_to_refs;</div><div class="line"><a name="l03333"></a><span class="lineno"> 3333</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> ref : all_diff.vars()) {</div><div class="line"><a name="l03334"></a><span class="lineno"> 3334</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> int64_t v : context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(ref).<a class="code" href="classoperations__research_1_1_domain.html#ade71ed1801ba29c7190c387511f76044">Values</a>()) {</div><div class="line"><a name="l03335"></a><span class="lineno"> 3335</span>  value_to_refs[v].push_back(ref);</div><div class="line"><a name="l03336"></a><span class="lineno"> 3336</span>  }</div><div class="line"><a name="l03337"></a><span class="lineno"> 3337</span>  }</div><div class="line"><a name="l03338"></a><span class="lineno"> 3338</span>  <span class="keywordtype">bool</span> propagated = <span class="keyword">false</span>;</div><div class="line"><a name="l03339"></a><span class="lineno"> 3339</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span>& it : value_to_refs) {</div><div class="line"><a name="l03340"></a><span class="lineno"> 3340</span>  <span class="keywordflow">if</span> (it.second.size() == 1 &&</div><div class="line"><a name="l03341"></a><span class="lineno"> 3341</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(it.second.front()).Size() > 1) {</div><div class="line"><a name="l03342"></a><span class="lineno"> 3342</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> ref = it.second.<a class="code" href="classoperations__research_1_1_domain.html#a52ade49985f3a075425913618285a30d">front</a>();</div><div class="line"><a name="l03343"></a><span class="lineno"> 3343</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(ref, Domain(it.first))) {</div><div class="line"><a name="l03344"></a><span class="lineno"> 3344</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l03345"></a><span class="lineno"> 3345</span>  }</div><div class="line"><a name="l03346"></a><span class="lineno"> 3346</span>  propagated = <span class="keyword">true</span>;</div><div class="line"><a name="l03347"></a><span class="lineno"> 3347</span>  }</div><div class="line"><a name="l03348"></a><span class="lineno"> 3348</span>  }</div><div class="line"><a name="l03349"></a><span class="lineno"> 3349</span>  <span class="keywordflow">if</span> (propagated) {</div><div class="line"><a name="l03350"></a><span class="lineno"> 3350</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(</div><div class="line"><a name="l03351"></a><span class="lineno"> 3351</span>  <span class="stringliteral">"all_diff: propagated mandatory values in permutation"</span>);</div><div class="line"><a name="l03352"></a><span class="lineno"> 3352</span>  something_was_propagated = <span class="keyword">true</span>;</div><div class="line"><a name="l03353"></a><span class="lineno"> 3353</span>  }</div><div class="line"><a name="l03354"></a><span class="lineno"> 3354</span>  }</div><div class="line"><a name="l03355"></a><span class="lineno"> 3355</span>  <span class="keywordflow">if</span> (!something_was_propagated) <span class="keywordflow">break</span>;</div><div class="line"><a name="l03356"></a><span class="lineno"> 3356</span>  }</div><div class="line"><a name="l03357"></a><span class="lineno"> 3357</span> </div><div class="line"><a name="l03358"></a><span class="lineno"> 3358</span>  <span class="keywordflow">return</span> constraint_has_changed;</div><div class="line"><a name="l03359"></a><span class="lineno"> 3359</span> }</div><div class="line"><a name="l03360"></a><span class="lineno"> 3360</span> </div><div class="line"><a name="l03361"></a><span class="lineno"> 3361</span> <span class="keyword">namespace </span>{</div><div class="line"><a name="l03362"></a><span class="lineno"> 3362</span> </div><div class="line"><a name="l03363"></a><span class="lineno"> 3363</span> <span class="comment">// Returns the sorted list of literals for given bool_or or at_most_one</span></div><div class="line"><a name="l03364"></a><span class="lineno"> 3364</span> <span class="comment">// constraint.</span></div><div class="line"><a name="l03365"></a><span class="lineno"> 3365</span> std::vector<int> GetLiteralsFromSetPPCConstraint(<span class="keyword">const</span> ConstraintProto& <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l03366"></a><span class="lineno"> 3366</span>  std::vector<int> sorted_literals;</div><div class="line"><a name="l03367"></a><span class="lineno"> 3367</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.constraint_case() == <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35a60d782b0aafa6f70b6230ffd970b2c6b">ConstraintProto::kAtMostOne</a>) {</div><div class="line"><a name="l03368"></a><span class="lineno"> 3368</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a> : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.at_most_one().literals()) {</div><div class="line"><a name="l03369"></a><span class="lineno"> 3369</span>  sorted_literals.push_back(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>);</div><div class="line"><a name="l03370"></a><span class="lineno"> 3370</span>  }</div><div class="line"><a name="l03371"></a><span class="lineno"> 3371</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.constraint_case() == <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35aaadb0c3370c597095e0cb7e768f04567">ConstraintProto::kBoolOr</a>) {</div><div class="line"><a name="l03372"></a><span class="lineno"> 3372</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a> : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.bool_or().literals()) {</div><div class="line"><a name="l03373"></a><span class="lineno"> 3373</span>  sorted_literals.push_back(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>);</div><div class="line"><a name="l03374"></a><span class="lineno"> 3374</span>  }</div><div class="line"><a name="l03375"></a><span class="lineno"> 3375</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.constraint_case() == <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35ad60570d9bed938f8b11385a7ba7f3508">ConstraintProto::kExactlyOne</a>) {</div><div class="line"><a name="l03376"></a><span class="lineno"> 3376</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a> : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.exactly_one().literals()) {</div><div class="line"><a name="l03377"></a><span class="lineno"> 3377</span>  sorted_literals.push_back(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>);</div><div class="line"><a name="l03378"></a><span class="lineno"> 3378</span>  }</div><div class="line"><a name="l03379"></a><span class="lineno"> 3379</span>  }</div><div class="line"><a name="l03380"></a><span class="lineno"> 3380</span>  std::sort(sorted_literals.begin(), sorted_literals.end());</div><div class="line"><a name="l03381"></a><span class="lineno"> 3381</span>  <span class="keywordflow">return</span> sorted_literals;</div><div class="line"><a name="l03382"></a><span class="lineno"> 3382</span> }</div><div class="line"><a name="l03383"></a><span class="lineno"> 3383</span> </div><div class="line"><a name="l03384"></a><span class="lineno"> 3384</span> <span class="comment">// Add the constraint (lhs => rhs) to the given proto. The hash map lhs -></span></div><div class="line"><a name="l03385"></a><span class="lineno"> 3385</span> <span class="comment">// bool_and constraint index is used to merge implications with the same lhs.</span></div><div class="line"><a name="l03386"></a><span class="lineno"> 3386</span> <span class="keywordtype">void</span> AddImplication(<span class="keywordtype">int</span> lhs, <span class="keywordtype">int</span> rhs, CpModelProto* <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>,</div><div class="line"><a name="l03387"></a><span class="lineno"> 3387</span>  absl::flat_hash_map<int, int>* ref_to_bool_and) {</div><div class="line"><a name="l03388"></a><span class="lineno"> 3388</span>  <span class="keywordflow">if</span> (ref_to_bool_and->contains(lhs)) {</div><div class="line"><a name="l03389"></a><span class="lineno"> 3389</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> ct_index = (*ref_to_bool_and)[lhs];</div><div class="line"><a name="l03390"></a><span class="lineno"> 3390</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a9b3e1bc8b76ea7d2614fd7ec2b066039">mutable_constraints</a>(ct_index)-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a962fe3316eafe5815027312585d5c4d6">mutable_bool_and</a>()-><a class="code" href="classoperations__research_1_1sat_1_1_bool_argument_proto.html#a9abd20cd5c98c0a4535d168a1c7bb18e">add_literals</a>(rhs);</div><div class="line"><a name="l03391"></a><span class="lineno"> 3391</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (ref_to_bool_and->contains(<a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(rhs))) {</div><div class="line"><a name="l03392"></a><span class="lineno"> 3392</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> ct_index = (*ref_to_bool_and)[<a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(rhs)];</div><div class="line"><a name="l03393"></a><span class="lineno"> 3393</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a9b3e1bc8b76ea7d2614fd7ec2b066039">mutable_constraints</a>(ct_index)-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a962fe3316eafe5815027312585d5c4d6">mutable_bool_and</a>()-><a class="code" href="classoperations__research_1_1sat_1_1_bool_argument_proto.html#a9abd20cd5c98c0a4535d168a1c7bb18e">add_literals</a>(</div><div class="line"><a name="l03394"></a><span class="lineno"> 3394</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(lhs));</div><div class="line"><a name="l03395"></a><span class="lineno"> 3395</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l03396"></a><span class="lineno"> 3396</span>  (*ref_to_bool_and)[lhs] = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#aeaf0da781ca9b370d96b7fbd3f74266a">constraints_size</a>();</div><div class="line"><a name="l03397"></a><span class="lineno"> 3397</span>  ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a> = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>();</div><div class="line"><a name="l03398"></a><span class="lineno"> 3398</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->add_enforcement_literal(lhs);</div><div class="line"><a name="l03399"></a><span class="lineno"> 3399</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_bool_and()->add_literals(rhs);</div><div class="line"><a name="l03400"></a><span class="lineno"> 3400</span>  }</div><div class="line"><a name="l03401"></a><span class="lineno"> 3401</span> }</div><div class="line"><a name="l03402"></a><span class="lineno"> 3402</span> </div><div class="line"><a name="l03403"></a><span class="lineno"> 3403</span> <span class="keyword">template</span> <<span class="keyword">typename</span> ClauseContainer></div><div class="line"><a name="l03404"></a><span class="lineno"> 3404</span> <span class="keywordtype">void</span> ExtractClauses(<span class="keywordtype">bool</span> use_bool_and, <span class="keyword">const</span> ClauseContainer& container,</div><div class="line"><a name="l03405"></a><span class="lineno"> 3405</span>  CpModelProto* <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>) {</div><div class="line"><a name="l03406"></a><span class="lineno"> 3406</span>  <span class="comment">// We regroup the "implication" into bool_and to have a more consise proto and</span></div><div class="line"><a name="l03407"></a><span class="lineno"> 3407</span>  <span class="comment">// also for nicer information about the number of binary clauses.</span></div><div class="line"><a name="l03408"></a><span class="lineno"> 3408</span>  <span class="comment">//</span></div><div class="line"><a name="l03409"></a><span class="lineno"> 3409</span>  <span class="comment">// Important: however, we do not do that for the model used during presolving</span></div><div class="line"><a name="l03410"></a><span class="lineno"> 3410</span>  <span class="comment">// since the order of the constraints might be important there depending on</span></div><div class="line"><a name="l03411"></a><span class="lineno"> 3411</span>  <span class="comment">// how we perform the postsolve.</span></div><div class="line"><a name="l03412"></a><span class="lineno"> 3412</span>  absl::flat_hash_map<int, int> ref_to_bool_and;</div><div class="line"><a name="l03413"></a><span class="lineno"> 3413</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < container.NumClauses(); ++i) {</div><div class="line"><a name="l03414"></a><span class="lineno"> 3414</span>  <span class="keyword">const</span> std::vector<Literal>& clause = container.Clause(i);</div><div class="line"><a name="l03415"></a><span class="lineno"> 3415</span>  <span class="keywordflow">if</span> (clause.empty()) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l03416"></a><span class="lineno"> 3416</span> </div><div class="line"><a name="l03417"></a><span class="lineno"> 3417</span>  <span class="comment">// bool_and.</span></div><div class="line"><a name="l03418"></a><span class="lineno"> 3418</span>  <span class="keywordflow">if</span> (use_bool_and && clause.size() == 2) {</div><div class="line"><a name="l03419"></a><span class="lineno"> 3419</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="constraint__solver_2table_8cc.html#acb18315d548212835cd8ed4287e6c0b6">a</a> = clause[0].IsPositive()</div><div class="line"><a name="l03420"></a><span class="lineno"> 3420</span>  ? clause[0].Variable().value()</div><div class="line"><a name="l03421"></a><span class="lineno"> 3421</span>  : <a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(clause[0].Variable().<a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a>());</div><div class="line"><a name="l03422"></a><span class="lineno"> 3422</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="constraint__solver_2table_8cc.html#a9293e4d29cac928301645070dd307683">b</a> = clause[1].IsPositive()</div><div class="line"><a name="l03423"></a><span class="lineno"> 3423</span>  ? clause[1].Variable().value()</div><div class="line"><a name="l03424"></a><span class="lineno"> 3424</span>  : <a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(clause[1].Variable().<a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a>());</div><div class="line"><a name="l03425"></a><span class="lineno"> 3425</span>  AddImplication(<a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(<a class="code" href="constraint__solver_2table_8cc.html#acb18315d548212835cd8ed4287e6c0b6">a</a>), <a class="code" href="constraint__solver_2table_8cc.html#a9293e4d29cac928301645070dd307683">b</a>, <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>, &ref_to_bool_and);</div><div class="line"><a name="l03426"></a><span class="lineno"> 3426</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l03427"></a><span class="lineno"> 3427</span>  }</div><div class="line"><a name="l03428"></a><span class="lineno"> 3428</span> </div><div class="line"><a name="l03429"></a><span class="lineno"> 3429</span>  <span class="comment">// bool_or.</span></div><div class="line"><a name="l03430"></a><span class="lineno"> 3430</span>  ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a> = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>();</div><div class="line"><a name="l03431"></a><span class="lineno"> 3431</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> Literal l : clause) {</div><div class="line"><a name="l03432"></a><span class="lineno"> 3432</span>  <span class="keywordflow">if</span> (l.IsPositive()) {</div><div class="line"><a name="l03433"></a><span class="lineno"> 3433</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_bool_or()->add_literals(l.Variable().value());</div><div class="line"><a name="l03434"></a><span class="lineno"> 3434</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l03435"></a><span class="lineno"> 3435</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_bool_or()->add_literals(<a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(l.Variable().value()));</div><div class="line"><a name="l03436"></a><span class="lineno"> 3436</span>  }</div><div class="line"><a name="l03437"></a><span class="lineno"> 3437</span>  }</div><div class="line"><a name="l03438"></a><span class="lineno"> 3438</span>  }</div><div class="line"><a name="l03439"></a><span class="lineno"> 3439</span> }</div><div class="line"><a name="l03440"></a><span class="lineno"> 3440</span> </div><div class="line"><a name="l03441"></a><span class="lineno"> 3441</span> } <span class="comment">// namespace</span></div><div class="line"><a name="l03442"></a><span class="lineno"> 3442</span> </div><div class="line"><a name="l03443"></a><span class="lineno"> 3443</span> <span class="keywordtype">bool</span> CpModelPresolver::PresolveNoOverlap(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l03444"></a><span class="lineno"> 3444</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l03445"></a><span class="lineno"> 3445</span>  NoOverlapConstraintProto* <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a> = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_no_overlap();</div><div class="line"><a name="l03446"></a><span class="lineno"> 3446</span>  <span class="keywordtype">bool</span> changed = <span class="keyword">false</span>;</div><div class="line"><a name="l03447"></a><span class="lineno"> 3447</span> </div><div class="line"><a name="l03448"></a><span class="lineno"> 3448</span>  <span class="comment">// Filter absent intervals.</span></div><div class="line"><a name="l03449"></a><span class="lineno"> 3449</span>  {</div><div class="line"><a name="l03450"></a><span class="lineno"> 3450</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> initial_num_intervals = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals_size();</div><div class="line"><a name="l03451"></a><span class="lineno"> 3451</span>  <span class="keywordtype">int</span> new_size = 0;</div><div class="line"><a name="l03452"></a><span class="lineno"> 3452</span> </div><div class="line"><a name="l03453"></a><span class="lineno"> 3453</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < initial_num_intervals; ++i) {</div><div class="line"><a name="l03454"></a><span class="lineno"> 3454</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> interval_index = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals(i);</div><div class="line"><a name="l03455"></a><span class="lineno"> 3455</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a100a8cc947bbdb3fd264d42eeeeaa849">ConstraintIsInactive</a>(interval_index)) {</div><div class="line"><a name="l03456"></a><span class="lineno"> 3456</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l03457"></a><span class="lineno"> 3457</span>  }</div><div class="line"><a name="l03458"></a><span class="lineno"> 3458</span> </div><div class="line"><a name="l03459"></a><span class="lineno"> 3459</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->set_intervals(new_size++, interval_index);</div><div class="line"><a name="l03460"></a><span class="lineno"> 3460</span>  }</div><div class="line"><a name="l03461"></a><span class="lineno"> 3461</span> </div><div class="line"><a name="l03462"></a><span class="lineno"> 3462</span>  <span class="keywordflow">if</span> (new_size < initial_num_intervals) {</div><div class="line"><a name="l03463"></a><span class="lineno"> 3463</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->mutable_intervals()->Truncate(new_size);</div><div class="line"><a name="l03464"></a><span class="lineno"> 3464</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"no_overlap: removed absent intervals"</span>);</div><div class="line"><a name="l03465"></a><span class="lineno"> 3465</span>  changed = <span class="keyword">true</span>;</div><div class="line"><a name="l03466"></a><span class="lineno"> 3466</span>  }</div><div class="line"><a name="l03467"></a><span class="lineno"> 3467</span>  }</div><div class="line"><a name="l03468"></a><span class="lineno"> 3468</span> </div><div class="line"><a name="l03469"></a><span class="lineno"> 3469</span>  <span class="comment">// Split constraints in disjoint sets.</span></div><div class="line"><a name="l03470"></a><span class="lineno"> 3470</span>  <span class="keywordflow">if</span> (<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals_size() > 1) {</div><div class="line"><a name="l03471"></a><span class="lineno"> 3471</span>  std::vector<IndexedInterval> indexed_intervals;</div><div class="line"><a name="l03472"></a><span class="lineno"> 3472</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals().size(); ++i) {</div><div class="line"><a name="l03473"></a><span class="lineno"> 3473</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="pack_8cc.html#a750b5d744c39a06bfb13e6eb010e35d0">index</a> = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals(i);</div><div class="line"><a name="l03474"></a><span class="lineno"> 3474</span>  indexed_intervals.push_back({<a class="code" href="pack_8cc.html#a750b5d744c39a06bfb13e6eb010e35d0">index</a>,</div><div class="line"><a name="l03475"></a><span class="lineno"> 3475</span>  IntegerValue(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a308f62525f1941cc6ef7f943bd2c4c18">StartMin</a>(<a class="code" href="pack_8cc.html#a750b5d744c39a06bfb13e6eb010e35d0">index</a>)),</div><div class="line"><a name="l03476"></a><span class="lineno"> 3476</span>  IntegerValue(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ad6ab55f6b68272caeaf24ff0d69818a4">EndMax</a>(<a class="code" href="pack_8cc.html#a750b5d744c39a06bfb13e6eb010e35d0">index</a>))});</div><div class="line"><a name="l03477"></a><span class="lineno"> 3477</span>  }</div><div class="line"><a name="l03478"></a><span class="lineno"> 3478</span>  std::vector<std::vector<int>> components;</div><div class="line"><a name="l03479"></a><span class="lineno"> 3479</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a3087cde516cefe9797be88d14a80079b">GetOverlappingIntervalComponents</a>(&indexed_intervals, &components);</div><div class="line"><a name="l03480"></a><span class="lineno"> 3480</span> </div><div class="line"><a name="l03481"></a><span class="lineno"> 3481</span>  <span class="keywordflow">if</span> (components.size() > 1) {</div><div class="line"><a name="l03482"></a><span class="lineno"> 3482</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> std::vector<int>& intervals : components) {</div><div class="line"><a name="l03483"></a><span class="lineno"> 3483</span>  <span class="keywordflow">if</span> (intervals.size() <= 1) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l03484"></a><span class="lineno"> 3484</span> </div><div class="line"><a name="l03485"></a><span class="lineno"> 3485</span>  NoOverlapConstraintProto* new_no_overlap =</div><div class="line"><a name="l03486"></a><span class="lineno"> 3486</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>()-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a5e1ab39de2f5594036bacb1d1e803bbc">mutable_no_overlap</a>();</div><div class="line"><a name="l03487"></a><span class="lineno"> 3487</span>  <span class="comment">// Fill in the intervals. Unfortunately, the Assign() method does not</span></div><div class="line"><a name="l03488"></a><span class="lineno"> 3488</span>  <span class="comment">// compile in or-tools.</span></div><div class="line"><a name="l03489"></a><span class="lineno"> 3489</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> i : intervals) {</div><div class="line"><a name="l03490"></a><span class="lineno"> 3490</span>  new_no_overlap-><a class="code" href="classoperations__research_1_1sat_1_1_no_overlap_constraint_proto.html#a3b0dc4db1d51bd6be689f9b0e18e5089">add_intervals</a>(i);</div><div class="line"><a name="l03491"></a><span class="lineno"> 3491</span>  }</div><div class="line"><a name="l03492"></a><span class="lineno"> 3492</span>  }</div><div class="line"><a name="l03493"></a><span class="lineno"> 3493</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l03494"></a><span class="lineno"> 3494</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"no_overlap: split into disjoint components"</span>);</div><div class="line"><a name="l03495"></a><span class="lineno"> 3495</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l03496"></a><span class="lineno"> 3496</span>  }</div><div class="line"><a name="l03497"></a><span class="lineno"> 3497</span>  }</div><div class="line"><a name="l03498"></a><span class="lineno"> 3498</span> </div><div class="line"><a name="l03499"></a><span class="lineno"> 3499</span>  std::vector<int> constant_intervals;</div><div class="line"><a name="l03500"></a><span class="lineno"> 3500</span>  int64_t size_min_of_non_constant_intervals =</div><div class="line"><a name="l03501"></a><span class="lineno"> 3501</span>  <a class="code" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::numeric_limits<int64_t>::max</a>();</div><div class="line"><a name="l03502"></a><span class="lineno"> 3502</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals_size(); ++i) {</div><div class="line"><a name="l03503"></a><span class="lineno"> 3503</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> interval_index = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals(i);</div><div class="line"><a name="l03504"></a><span class="lineno"> 3504</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a9da1edd6532c2c2b0c09544eade57805">IntervalIsConstant</a>(interval_index)) {</div><div class="line"><a name="l03505"></a><span class="lineno"> 3505</span>  constant_intervals.push_back(interval_index);</div><div class="line"><a name="l03506"></a><span class="lineno"> 3506</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l03507"></a><span class="lineno"> 3507</span>  size_min_of_non_constant_intervals =</div><div class="line"><a name="l03508"></a><span class="lineno"> 3508</span>  <a class="code" href="alldiff__cst_8cc.html#ad10edae0a852d72fb76afb1c77735045">std::min</a>(size_min_of_non_constant_intervals,</div><div class="line"><a name="l03509"></a><span class="lineno"> 3509</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aef0a687ec05a3e5dd7aa78745e9fb382">SizeMin</a>(interval_index));</div><div class="line"><a name="l03510"></a><span class="lineno"> 3510</span>  }</div><div class="line"><a name="l03511"></a><span class="lineno"> 3511</span>  }</div><div class="line"><a name="l03512"></a><span class="lineno"> 3512</span> </div><div class="line"><a name="l03513"></a><span class="lineno"> 3513</span>  <span class="keywordflow">if</span> (!constant_intervals.empty()) {</div><div class="line"><a name="l03514"></a><span class="lineno"> 3514</span>  <span class="comment">// Sort constant_intervals by start min.</span></div><div class="line"><a name="l03515"></a><span class="lineno"> 3515</span>  std::sort(constant_intervals.begin(), constant_intervals.end(),</div><div class="line"><a name="l03516"></a><span class="lineno"> 3516</span>  [<span class="keyword">this</span>](<span class="keywordtype">int</span> i1, <span class="keywordtype">int</span> i2) {</div><div class="line"><a name="l03517"></a><span class="lineno"> 3517</span>  <span class="keywordflow">return</span> context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a308f62525f1941cc6ef7f943bd2c4c18">StartMin</a>(i1) < context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a308f62525f1941cc6ef7f943bd2c4c18">StartMin</a>(i2);</div><div class="line"><a name="l03518"></a><span class="lineno"> 3518</span>  });</div><div class="line"><a name="l03519"></a><span class="lineno"> 3519</span> </div><div class="line"><a name="l03520"></a><span class="lineno"> 3520</span>  <span class="comment">// Check for overlapping constant intervals. We need to check feasibility</span></div><div class="line"><a name="l03521"></a><span class="lineno"> 3521</span>  <span class="comment">// before we simplify the constraint, as we might remove conflicting</span></div><div class="line"><a name="l03522"></a><span class="lineno"> 3522</span>  <span class="comment">// overlapping constant intervals.</span></div><div class="line"><a name="l03523"></a><span class="lineno"> 3523</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i + 1 < constant_intervals.size(); ++i) {</div><div class="line"><a name="l03524"></a><span class="lineno"> 3524</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ad6ab55f6b68272caeaf24ff0d69818a4">EndMax</a>(constant_intervals[i]) ></div><div class="line"><a name="l03525"></a><span class="lineno"> 3525</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a308f62525f1941cc6ef7f943bd2c4c18">StartMin</a>(constant_intervals[i + 1])) {</div><div class="line"><a name="l03526"></a><span class="lineno"> 3526</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"no_overlap: constant intervals overlap"</span>);</div><div class="line"><a name="l03527"></a><span class="lineno"> 3527</span>  <span class="keywordflow">return</span> context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5aa53538ba8adaa0bea1c3c0727425b0">NotifyThatModelIsUnsat</a>();</div><div class="line"><a name="l03528"></a><span class="lineno"> 3528</span>  }</div><div class="line"><a name="l03529"></a><span class="lineno"> 3529</span>  }</div><div class="line"><a name="l03530"></a><span class="lineno"> 3530</span> </div><div class="line"><a name="l03531"></a><span class="lineno"> 3531</span>  <span class="keywordflow">if</span> (constant_intervals.size() == <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals_size()) {</div><div class="line"><a name="l03532"></a><span class="lineno"> 3532</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"no_overlap: no variable intervals"</span>);</div><div class="line"><a name="l03533"></a><span class="lineno"> 3533</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l03534"></a><span class="lineno"> 3534</span>  }</div><div class="line"><a name="l03535"></a><span class="lineno"> 3535</span> </div><div class="line"><a name="l03536"></a><span class="lineno"> 3536</span>  absl::flat_hash_set<int> intervals_to_remove;</div><div class="line"><a name="l03537"></a><span class="lineno"> 3537</span> </div><div class="line"><a name="l03538"></a><span class="lineno"> 3538</span>  <span class="comment">// If two constant intervals are separated by a gap smaller that the min</span></div><div class="line"><a name="l03539"></a><span class="lineno"> 3539</span>  <span class="comment">// size of all non-constant intervals, then we can merge them.</span></div><div class="line"><a name="l03540"></a><span class="lineno"> 3540</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i + 1 < constant_intervals.size(); ++i) {</div><div class="line"><a name="l03541"></a><span class="lineno"> 3541</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> start = i;</div><div class="line"><a name="l03542"></a><span class="lineno"> 3542</span>  <span class="keywordflow">while</span> (i + 1 < constant_intervals.size() &&</div><div class="line"><a name="l03543"></a><span class="lineno"> 3543</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a308f62525f1941cc6ef7f943bd2c4c18">StartMin</a>(constant_intervals[i + 1]) -</div><div class="line"><a name="l03544"></a><span class="lineno"> 3544</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ad6ab55f6b68272caeaf24ff0d69818a4">EndMax</a>(constant_intervals[i]) <</div><div class="line"><a name="l03545"></a><span class="lineno"> 3545</span>  size_min_of_non_constant_intervals) {</div><div class="line"><a name="l03546"></a><span class="lineno"> 3546</span>  i++;</div><div class="line"><a name="l03547"></a><span class="lineno"> 3547</span>  }</div><div class="line"><a name="l03548"></a><span class="lineno"> 3548</span>  <span class="keywordflow">if</span> (i == start) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l03549"></a><span class="lineno"> 3549</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = start; j <= i; ++j) {</div><div class="line"><a name="l03550"></a><span class="lineno"> 3550</span>  intervals_to_remove.insert(constant_intervals[j]);</div><div class="line"><a name="l03551"></a><span class="lineno"> 3551</span>  }</div><div class="line"><a name="l03552"></a><span class="lineno"> 3552</span>  <span class="keyword">const</span> int64_t new_start = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a308f62525f1941cc6ef7f943bd2c4c18">StartMin</a>(constant_intervals[start]);</div><div class="line"><a name="l03553"></a><span class="lineno"> 3553</span>  <span class="keyword">const</span> int64_t new_end = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ad6ab55f6b68272caeaf24ff0d69818a4">EndMax</a>(constant_intervals[i]);</div><div class="line"><a name="l03554"></a><span class="lineno"> 3554</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->add_intervals(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#aeaf0da781ca9b370d96b7fbd3f74266a">constraints_size</a>());</div><div class="line"><a name="l03555"></a><span class="lineno"> 3555</span>  IntervalConstraintProto* new_interval =</div><div class="line"><a name="l03556"></a><span class="lineno"> 3556</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>()-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a0c6e505a600b075354ca4c9f9a08c4d0">mutable_interval</a>();</div><div class="line"><a name="l03557"></a><span class="lineno"> 3557</span>  new_interval-><a class="code" href="classoperations__research_1_1sat_1_1_interval_constraint_proto.html#ac38f9dab53f7f5580558642a2247602b">mutable_start_view</a>()-><a class="code" href="classoperations__research_1_1sat_1_1_linear_expression_proto.html#a817b500800adbaa67949f6d5d31b1b26">set_offset</a>(new_start);</div><div class="line"><a name="l03558"></a><span class="lineno"> 3558</span>  new_interval->mutable_size_view()->set_offset(new_end - new_start);</div><div class="line"><a name="l03559"></a><span class="lineno"> 3559</span>  new_interval->mutable_end_view()->set_offset(new_end);</div><div class="line"><a name="l03560"></a><span class="lineno"> 3560</span>  }</div><div class="line"><a name="l03561"></a><span class="lineno"> 3561</span> </div><div class="line"><a name="l03562"></a><span class="lineno"> 3562</span>  <span class="comment">// Cleanup the original proto.</span></div><div class="line"><a name="l03563"></a><span class="lineno"> 3563</span>  <span class="keywordflow">if</span> (!intervals_to_remove.empty()) {</div><div class="line"><a name="l03564"></a><span class="lineno"> 3564</span>  <span class="keywordtype">int</span> new_size = 0;</div><div class="line"><a name="l03565"></a><span class="lineno"> 3565</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> old_size = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals_size();</div><div class="line"><a name="l03566"></a><span class="lineno"> 3566</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < old_size; ++i) {</div><div class="line"><a name="l03567"></a><span class="lineno"> 3567</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> interval_index = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals(i);</div><div class="line"><a name="l03568"></a><span class="lineno"> 3568</span>  <span class="keywordflow">if</span> (intervals_to_remove.contains(interval_index)) {</div><div class="line"><a name="l03569"></a><span class="lineno"> 3569</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l03570"></a><span class="lineno"> 3570</span>  }</div><div class="line"><a name="l03571"></a><span class="lineno"> 3571</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->set_intervals(new_size++, interval_index);</div><div class="line"><a name="l03572"></a><span class="lineno"> 3572</span>  }</div><div class="line"><a name="l03573"></a><span class="lineno"> 3573</span>  <a class="code" href="base_2logging_8h.html#a4bd2e815ca2f702a4b6aa744b1ff3b82">CHECK_LT</a>(new_size, old_size);</div><div class="line"><a name="l03574"></a><span class="lineno"> 3574</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->mutable_intervals()->Truncate(new_size);</div><div class="line"><a name="l03575"></a><span class="lineno"> 3575</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(</div><div class="line"><a name="l03576"></a><span class="lineno"> 3576</span>  <span class="stringliteral">"no_overlap: merge constant contiguous intervals"</span>);</div><div class="line"><a name="l03577"></a><span class="lineno"> 3577</span>  intervals_to_remove.clear();</div><div class="line"><a name="l03578"></a><span class="lineno"> 3578</span>  constant_intervals.clear();</div><div class="line"><a name="l03579"></a><span class="lineno"> 3579</span>  changed = <span class="keyword">true</span>;</div><div class="line"><a name="l03580"></a><span class="lineno"> 3580</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l03581"></a><span class="lineno"> 3581</span>  }</div><div class="line"><a name="l03582"></a><span class="lineno"> 3582</span>  }</div><div class="line"><a name="l03583"></a><span class="lineno"> 3583</span> </div><div class="line"><a name="l03584"></a><span class="lineno"> 3584</span>  <span class="keywordflow">if</span> (<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals_size() == 1) {</div><div class="line"><a name="l03585"></a><span class="lineno"> 3585</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"no_overlap: only one interval"</span>);</div><div class="line"><a name="l03586"></a><span class="lineno"> 3586</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l03587"></a><span class="lineno"> 3587</span>  }</div><div class="line"><a name="l03588"></a><span class="lineno"> 3588</span>  <span class="keywordflow">if</span> (<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals().empty()) {</div><div class="line"><a name="l03589"></a><span class="lineno"> 3589</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"no_overlap: no intervals"</span>);</div><div class="line"><a name="l03590"></a><span class="lineno"> 3590</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l03591"></a><span class="lineno"> 3591</span>  }</div><div class="line"><a name="l03592"></a><span class="lineno"> 3592</span> </div><div class="line"><a name="l03593"></a><span class="lineno"> 3593</span>  <span class="keywordflow">return</span> changed;</div><div class="line"><a name="l03594"></a><span class="lineno"> 3594</span> }</div><div class="line"><a name="l03595"></a><span class="lineno"> 3595</span> </div><div class="line"><a name="l03596"></a><span class="lineno"> 3596</span> <span class="keywordtype">bool</span> CpModelPresolver::PresolveNoOverlap2D(<span class="keywordtype">int</span> c, ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l03597"></a><span class="lineno"> 3597</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) {</div><div class="line"><a name="l03598"></a><span class="lineno"> 3598</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l03599"></a><span class="lineno"> 3599</span>  }</div><div class="line"><a name="l03600"></a><span class="lineno"> 3600</span> </div><div class="line"><a name="l03601"></a><span class="lineno"> 3601</span>  <span class="keyword">const</span> NoOverlap2DConstraintProto& <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a> = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->no_overlap_2d();</div><div class="line"><a name="l03602"></a><span class="lineno"> 3602</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> initial_num_boxes = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.x_intervals_size();</div><div class="line"><a name="l03603"></a><span class="lineno"> 3603</span> </div><div class="line"><a name="l03604"></a><span class="lineno"> 3604</span>  <span class="keywordtype">bool</span> has_zero_sizes = <span class="keyword">false</span>;</div><div class="line"><a name="l03605"></a><span class="lineno"> 3605</span>  <span class="keywordtype">bool</span> x_constant = <span class="keyword">true</span>;</div><div class="line"><a name="l03606"></a><span class="lineno"> 3606</span>  <span class="keywordtype">bool</span> y_constant = <span class="keyword">true</span>;</div><div class="line"><a name="l03607"></a><span class="lineno"> 3607</span> </div><div class="line"><a name="l03608"></a><span class="lineno"> 3608</span>  <span class="comment">// Filter absent boxes.</span></div><div class="line"><a name="l03609"></a><span class="lineno"> 3609</span>  <span class="keywordtype">int</span> new_size = 0;</div><div class="line"><a name="l03610"></a><span class="lineno"> 3610</span>  std::vector<Rectangle> bounding_boxes;</div><div class="line"><a name="l03611"></a><span class="lineno"> 3611</span>  std::vector<int> active_boxes;</div><div class="line"><a name="l03612"></a><span class="lineno"> 3612</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.x_intervals_size(); ++i) {</div><div class="line"><a name="l03613"></a><span class="lineno"> 3613</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> x_interval_index = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.x_intervals(i);</div><div class="line"><a name="l03614"></a><span class="lineno"> 3614</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> y_interval_index = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.y_intervals(i);</div><div class="line"><a name="l03615"></a><span class="lineno"> 3615</span> </div><div class="line"><a name="l03616"></a><span class="lineno"> 3616</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a100a8cc947bbdb3fd264d42eeeeaa849">ConstraintIsInactive</a>(x_interval_index) ||</div><div class="line"><a name="l03617"></a><span class="lineno"> 3617</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a100a8cc947bbdb3fd264d42eeeeaa849">ConstraintIsInactive</a>(y_interval_index)) {</div><div class="line"><a name="l03618"></a><span class="lineno"> 3618</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l03619"></a><span class="lineno"> 3619</span>  }</div><div class="line"><a name="l03620"></a><span class="lineno"> 3620</span> </div><div class="line"><a name="l03621"></a><span class="lineno"> 3621</span>  <span class="keywordflow">if</span> (<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.boxes_with_null_area_can_overlap() &&</div><div class="line"><a name="l03622"></a><span class="lineno"> 3622</span>  (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ae3ad719e8a03c11498d2d0ab18558f95">SizeMax</a>(x_interval_index) == 0 ||</div><div class="line"><a name="l03623"></a><span class="lineno"> 3623</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ae3ad719e8a03c11498d2d0ab18558f95">SizeMax</a>(y_interval_index) == 0)) {</div><div class="line"><a name="l03624"></a><span class="lineno"> 3624</span>  <span class="keywordflow">if</span> (<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.boxes_with_null_area_can_overlap()) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l03625"></a><span class="lineno"> 3625</span>  has_zero_sizes = <span class="keyword">true</span>;</div><div class="line"><a name="l03626"></a><span class="lineno"> 3626</span>  }</div><div class="line"><a name="l03627"></a><span class="lineno"> 3627</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_no_overlap_2d()->set_x_intervals(new_size, x_interval_index);</div><div class="line"><a name="l03628"></a><span class="lineno"> 3628</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_no_overlap_2d()->set_y_intervals(new_size, y_interval_index);</div><div class="line"><a name="l03629"></a><span class="lineno"> 3629</span>  bounding_boxes.push_back(</div><div class="line"><a name="l03630"></a><span class="lineno"> 3630</span>  {IntegerValue(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a308f62525f1941cc6ef7f943bd2c4c18">StartMin</a>(x_interval_index)),</div><div class="line"><a name="l03631"></a><span class="lineno"> 3631</span>  IntegerValue(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ad6ab55f6b68272caeaf24ff0d69818a4">EndMax</a>(x_interval_index)),</div><div class="line"><a name="l03632"></a><span class="lineno"> 3632</span>  IntegerValue(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a308f62525f1941cc6ef7f943bd2c4c18">StartMin</a>(y_interval_index)),</div><div class="line"><a name="l03633"></a><span class="lineno"> 3633</span>  IntegerValue(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ad6ab55f6b68272caeaf24ff0d69818a4">EndMax</a>(y_interval_index))});</div><div class="line"><a name="l03634"></a><span class="lineno"> 3634</span>  active_boxes.push_back(new_size);</div><div class="line"><a name="l03635"></a><span class="lineno"> 3635</span>  new_size++;</div><div class="line"><a name="l03636"></a><span class="lineno"> 3636</span> </div><div class="line"><a name="l03637"></a><span class="lineno"> 3637</span>  <span class="keywordflow">if</span> (x_constant && !context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a9da1edd6532c2c2b0c09544eade57805">IntervalIsConstant</a>(x_interval_index)) {</div><div class="line"><a name="l03638"></a><span class="lineno"> 3638</span>  x_constant = <span class="keyword">false</span>;</div><div class="line"><a name="l03639"></a><span class="lineno"> 3639</span>  }</div><div class="line"><a name="l03640"></a><span class="lineno"> 3640</span>  <span class="keywordflow">if</span> (y_constant && !context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a9da1edd6532c2c2b0c09544eade57805">IntervalIsConstant</a>(y_interval_index)) {</div><div class="line"><a name="l03641"></a><span class="lineno"> 3641</span>  y_constant = <span class="keyword">false</span>;</div><div class="line"><a name="l03642"></a><span class="lineno"> 3642</span>  }</div><div class="line"><a name="l03643"></a><span class="lineno"> 3643</span>  }</div><div class="line"><a name="l03644"></a><span class="lineno"> 3644</span> </div><div class="line"><a name="l03645"></a><span class="lineno"> 3645</span>  std::vector<absl::Span<int>> components = <a class="code" href="namespaceoperations__research_1_1sat.html#a3e2516c0d3fc4991896c6a9bbead80e7">GetOverlappingRectangleComponents</a>(</div><div class="line"><a name="l03646"></a><span class="lineno"> 3646</span>  bounding_boxes, absl::MakeSpan(active_boxes));</div><div class="line"><a name="l03647"></a><span class="lineno"> 3647</span>  <span class="keywordflow">if</span> (components.size() > 1) {</div><div class="line"><a name="l03648"></a><span class="lineno"> 3648</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> absl::Span<int> boxes : components) {</div><div class="line"><a name="l03649"></a><span class="lineno"> 3649</span>  <span class="keywordflow">if</span> (boxes.size() <= 1) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l03650"></a><span class="lineno"> 3650</span> </div><div class="line"><a name="l03651"></a><span class="lineno"> 3651</span>  NoOverlap2DConstraintProto* new_no_overlap_2d =</div><div class="line"><a name="l03652"></a><span class="lineno"> 3652</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>()-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a17e451dbcd12f2170f8c8e9417ea8119">mutable_no_overlap_2d</a>();</div><div class="line"><a name="l03653"></a><span class="lineno"> 3653</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="constraint__solver_2table_8cc.html#a9293e4d29cac928301645070dd307683">b</a> : boxes) {</div><div class="line"><a name="l03654"></a><span class="lineno"> 3654</span>  new_no_overlap_2d-><a class="code" href="classoperations__research_1_1sat_1_1_no_overlap2_d_constraint_proto.html#abfa73d7f106725ceabf4cda4514414a1">add_x_intervals</a>(<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.x_intervals(<a class="code" href="constraint__solver_2table_8cc.html#a9293e4d29cac928301645070dd307683">b</a>));</div><div class="line"><a name="l03655"></a><span class="lineno"> 3655</span>  new_no_overlap_2d->add_y_intervals(<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.y_intervals(<a class="code" href="constraint__solver_2table_8cc.html#a9293e4d29cac928301645070dd307683">b</a>));</div><div class="line"><a name="l03656"></a><span class="lineno"> 3656</span>  }</div><div class="line"><a name="l03657"></a><span class="lineno"> 3657</span>  }</div><div class="line"><a name="l03658"></a><span class="lineno"> 3658</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l03659"></a><span class="lineno"> 3659</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"no_overlap_2d: split into disjoint components"</span>);</div><div class="line"><a name="l03660"></a><span class="lineno"> 3660</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l03661"></a><span class="lineno"> 3661</span>  }</div><div class="line"><a name="l03662"></a><span class="lineno"> 3662</span> </div><div class="line"><a name="l03663"></a><span class="lineno"> 3663</span>  <span class="keywordflow">if</span> (!has_zero_sizes && (x_constant || y_constant)) {</div><div class="line"><a name="l03664"></a><span class="lineno"> 3664</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(</div><div class="line"><a name="l03665"></a><span class="lineno"> 3665</span>  <span class="stringliteral">"no_overlap_2d: a dimension is constant, splitting into many no "</span></div><div class="line"><a name="l03666"></a><span class="lineno"> 3666</span>  <span class="stringliteral">"overlaps"</span>);</div><div class="line"><a name="l03667"></a><span class="lineno"> 3667</span>  std::vector<IndexedInterval> indexed_intervals;</div><div class="line"><a name="l03668"></a><span class="lineno"> 3668</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < new_size; ++i) {</div><div class="line"><a name="l03669"></a><span class="lineno"> 3669</span>  <span class="keywordtype">int</span> x = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.x_intervals(i);</div><div class="line"><a name="l03670"></a><span class="lineno"> 3670</span>  <span class="keywordtype">int</span> y = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.y_intervals(i);</div><div class="line"><a name="l03671"></a><span class="lineno"> 3671</span>  <span class="keywordflow">if</span> (x_constant) <a class="code" href="namespaceoperations__research_1_1math__opt.html#a5de89a1f6e3f80a49a0d76136d8044e2">std::swap</a>(x, y);</div><div class="line"><a name="l03672"></a><span class="lineno"> 3672</span>  indexed_intervals.push_back({x, IntegerValue(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a308f62525f1941cc6ef7f943bd2c4c18">StartMin</a>(y)),</div><div class="line"><a name="l03673"></a><span class="lineno"> 3673</span>  IntegerValue(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ad6ab55f6b68272caeaf24ff0d69818a4">EndMax</a>(y))});</div><div class="line"><a name="l03674"></a><span class="lineno"> 3674</span>  }</div><div class="line"><a name="l03675"></a><span class="lineno"> 3675</span>  std::vector<std::vector<int>> no_overlaps;</div><div class="line"><a name="l03676"></a><span class="lineno"> 3676</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a74b637c7690aa3cd4c80157b44c5e5ac">ConstructOverlappingSets</a>(<span class="comment">/*already_sorted=*/</span><span class="keyword">false</span>, &indexed_intervals,</div><div class="line"><a name="l03677"></a><span class="lineno"> 3677</span>  &no_overlaps);</div><div class="line"><a name="l03678"></a><span class="lineno"> 3678</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> std::vector<int>& no_overlap : no_overlaps) {</div><div class="line"><a name="l03679"></a><span class="lineno"> 3679</span>  ConstraintProto* new_ct = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>();</div><div class="line"><a name="l03680"></a><span class="lineno"> 3680</span>  <span class="comment">// Unfortunately, the Assign() method does not work in or-tools as the</span></div><div class="line"><a name="l03681"></a><span class="lineno"> 3681</span>  <span class="comment">// protobuf int32_t type is not the int type.</span></div><div class="line"><a name="l03682"></a><span class="lineno"> 3682</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> i : no_overlap) {</div><div class="line"><a name="l03683"></a><span class="lineno"> 3683</span>  new_ct-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a5e1ab39de2f5594036bacb1d1e803bbc">mutable_no_overlap</a>()-><a class="code" href="classoperations__research_1_1sat_1_1_no_overlap_constraint_proto.html#a3b0dc4db1d51bd6be689f9b0e18e5089">add_intervals</a>(i);</div><div class="line"><a name="l03684"></a><span class="lineno"> 3684</span>  }</div><div class="line"><a name="l03685"></a><span class="lineno"> 3685</span>  }</div><div class="line"><a name="l03686"></a><span class="lineno"> 3686</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l03687"></a><span class="lineno"> 3687</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l03688"></a><span class="lineno"> 3688</span>  }</div><div class="line"><a name="l03689"></a><span class="lineno"> 3689</span> </div><div class="line"><a name="l03690"></a><span class="lineno"> 3690</span>  <span class="keywordflow">if</span> (new_size < initial_num_boxes) {</div><div class="line"><a name="l03691"></a><span class="lineno"> 3691</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"no_overlap_2d: removed inactive boxes"</span>);</div><div class="line"><a name="l03692"></a><span class="lineno"> 3692</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_no_overlap_2d()->mutable_x_intervals()->Truncate(new_size);</div><div class="line"><a name="l03693"></a><span class="lineno"> 3693</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_no_overlap_2d()->mutable_y_intervals()->Truncate(new_size);</div><div class="line"><a name="l03694"></a><span class="lineno"> 3694</span>  }</div><div class="line"><a name="l03695"></a><span class="lineno"> 3695</span> </div><div class="line"><a name="l03696"></a><span class="lineno"> 3696</span>  <span class="keywordflow">if</span> (new_size == 0) {</div><div class="line"><a name="l03697"></a><span class="lineno"> 3697</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"no_overlap_2d: no boxes"</span>);</div><div class="line"><a name="l03698"></a><span class="lineno"> 3698</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l03699"></a><span class="lineno"> 3699</span>  }</div><div class="line"><a name="l03700"></a><span class="lineno"> 3700</span> </div><div class="line"><a name="l03701"></a><span class="lineno"> 3701</span>  <span class="keywordflow">if</span> (new_size == 1) {</div><div class="line"><a name="l03702"></a><span class="lineno"> 3702</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"no_overlap_2d: only one box"</span>);</div><div class="line"><a name="l03703"></a><span class="lineno"> 3703</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l03704"></a><span class="lineno"> 3704</span>  }</div><div class="line"><a name="l03705"></a><span class="lineno"> 3705</span> </div><div class="line"><a name="l03706"></a><span class="lineno"> 3706</span>  <span class="keywordflow">return</span> new_size < initial_num_boxes;</div><div class="line"><a name="l03707"></a><span class="lineno"> 3707</span> }</div><div class="line"><a name="l03708"></a><span class="lineno"> 3708</span> </div><div class="line"><a name="l03709"></a><span class="lineno"> 3709</span> <span class="keywordtype">bool</span> CpModelPresolver::PresolveCumulative(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l03710"></a><span class="lineno"> 3710</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l03711"></a><span class="lineno"> 3711</span> </div><div class="line"><a name="l03712"></a><span class="lineno"> 3712</span>  CumulativeConstraintProto* <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a> = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_cumulative();</div><div class="line"><a name="l03713"></a><span class="lineno"> 3713</span>  <span class="keywordtype">bool</span> changed = <span class="keyword">false</span>;</div><div class="line"><a name="l03714"></a><span class="lineno"> 3714</span>  <span class="keywordtype">int</span> num_fixed_demands = 0;</div><div class="line"><a name="l03715"></a><span class="lineno"> 3715</span>  <span class="keyword">const</span> int64_t capacity_max = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a00f995618e00d575372ff823a12553a9">MaxOf</a>(<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->capacity());</div><div class="line"><a name="l03716"></a><span class="lineno"> 3716</span> </div><div class="line"><a name="l03717"></a><span class="lineno"> 3717</span>  <span class="comment">// Checks the capacity of the constraint.</span></div><div class="line"><a name="l03718"></a><span class="lineno"> 3718</span>  {</div><div class="line"><a name="l03719"></a><span class="lineno"> 3719</span>  <span class="keywordtype">bool</span> domain_changed = <span class="keyword">false</span>;</div><div class="line"><a name="l03720"></a><span class="lineno"> 3720</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(</div><div class="line"><a name="l03721"></a><span class="lineno"> 3721</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->capacity(), Domain(0, capacity_max), &domain_changed)) {</div><div class="line"><a name="l03722"></a><span class="lineno"> 3722</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l03723"></a><span class="lineno"> 3723</span>  }</div><div class="line"><a name="l03724"></a><span class="lineno"> 3724</span>  <span class="keywordflow">if</span> (domain_changed) {</div><div class="line"><a name="l03725"></a><span class="lineno"> 3725</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"cumulative: trimmed negative capacity"</span>);</div><div class="line"><a name="l03726"></a><span class="lineno"> 3726</span>  }</div><div class="line"><a name="l03727"></a><span class="lineno"> 3727</span>  }</div><div class="line"><a name="l03728"></a><span class="lineno"> 3728</span> </div><div class="line"><a name="l03729"></a><span class="lineno"> 3729</span>  {</div><div class="line"><a name="l03730"></a><span class="lineno"> 3730</span>  <span class="comment">// Filter absent intervals, or zero demands, or demand incompatible with the</span></div><div class="line"><a name="l03731"></a><span class="lineno"> 3731</span>  <span class="comment">// capacity.</span></div><div class="line"><a name="l03732"></a><span class="lineno"> 3732</span>  <span class="keywordtype">int</span> new_size = 0;</div><div class="line"><a name="l03733"></a><span class="lineno"> 3733</span>  <span class="keywordtype">int</span> num_zero_demand_removed = 0;</div><div class="line"><a name="l03734"></a><span class="lineno"> 3734</span>  <span class="keywordtype">int</span> num_zero_size_removed = 0;</div><div class="line"><a name="l03735"></a><span class="lineno"> 3735</span>  <span class="keywordtype">int</span> num_incompatible_demands = 0;</div><div class="line"><a name="l03736"></a><span class="lineno"> 3736</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals_size(); ++i) {</div><div class="line"><a name="l03737"></a><span class="lineno"> 3737</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a100a8cc947bbdb3fd264d42eeeeaa849">ConstraintIsInactive</a>(<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals(i))) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l03738"></a><span class="lineno"> 3738</span> </div><div class="line"><a name="l03739"></a><span class="lineno"> 3739</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> demand_ref = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->demands(i);</div><div class="line"><a name="l03740"></a><span class="lineno"> 3740</span>  <span class="keyword">const</span> int64_t demand_max = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a00f995618e00d575372ff823a12553a9">MaxOf</a>(demand_ref);</div><div class="line"><a name="l03741"></a><span class="lineno"> 3741</span>  <span class="keywordflow">if</span> (demand_max == 0) {</div><div class="line"><a name="l03742"></a><span class="lineno"> 3742</span>  num_zero_demand_removed++;</div><div class="line"><a name="l03743"></a><span class="lineno"> 3743</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l03744"></a><span class="lineno"> 3744</span>  }</div><div class="line"><a name="l03745"></a><span class="lineno"> 3745</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#abb6eb29f56c3a33b8ae1b74b08b755c2">IsFixed</a>(demand_ref)) {</div><div class="line"><a name="l03746"></a><span class="lineno"> 3746</span>  num_fixed_demands++;</div><div class="line"><a name="l03747"></a><span class="lineno"> 3747</span>  }</div><div class="line"><a name="l03748"></a><span class="lineno"> 3748</span> </div><div class="line"><a name="l03749"></a><span class="lineno"> 3749</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ae3ad719e8a03c11498d2d0ab18558f95">SizeMax</a>(<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals(i)) == 0) {</div><div class="line"><a name="l03750"></a><span class="lineno"> 3750</span>  <span class="comment">// Size 0 intervals cannot contribute to a cumulative.</span></div><div class="line"><a name="l03751"></a><span class="lineno"> 3751</span>  num_zero_size_removed++;</div><div class="line"><a name="l03752"></a><span class="lineno"> 3752</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l03753"></a><span class="lineno"> 3753</span>  }</div><div class="line"><a name="l03754"></a><span class="lineno"> 3754</span> </div><div class="line"><a name="l03755"></a><span class="lineno"> 3755</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(demand_ref) > capacity_max) {</div><div class="line"><a name="l03756"></a><span class="lineno"> 3756</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ad72f81052c0b904f369ac1cee7217b83">ConstraintIsOptional</a>(<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals(i))) {</div><div class="line"><a name="l03757"></a><span class="lineno"> 3757</span>  ConstraintProto* interval_ct =</div><div class="line"><a name="l03758"></a><span class="lineno"> 3758</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a9b3e1bc8b76ea7d2614fd7ec2b066039">mutable_constraints</a>(<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals(i));</div><div class="line"><a name="l03759"></a><span class="lineno"> 3759</span>  <a class="code" href="base_2logging_8h.html#ae89df3243bbb8341130c7b3f44145ea0">DCHECK_EQ</a>(interval_ct->enforcement_literal_size(), 1);</div><div class="line"><a name="l03760"></a><span class="lineno"> 3760</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a> = interval_ct->enforcement_literal(0);</div><div class="line"><a name="l03761"></a><span class="lineno"> 3761</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ad0d1a630c07ba2321cf43d97a425bc30">SetLiteralToFalse</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>)) {</div><div class="line"><a name="l03762"></a><span class="lineno"> 3762</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l03763"></a><span class="lineno"> 3763</span>  }</div><div class="line"><a name="l03764"></a><span class="lineno"> 3764</span>  num_incompatible_demands++;</div><div class="line"><a name="l03765"></a><span class="lineno"> 3765</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l03766"></a><span class="lineno"> 3766</span>  } <span class="keywordflow">else</span> { <span class="comment">// Interval is performed.</span></div><div class="line"><a name="l03767"></a><span class="lineno"> 3767</span>  <span class="keywordflow">return</span> context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5aa53538ba8adaa0bea1c3c0727425b0">NotifyThatModelIsUnsat</a>(</div><div class="line"><a name="l03768"></a><span class="lineno"> 3768</span>  <span class="stringliteral">"cumulative: performed demand exceeds capacity."</span>);</div><div class="line"><a name="l03769"></a><span class="lineno"> 3769</span>  }</div><div class="line"><a name="l03770"></a><span class="lineno"> 3770</span>  }</div><div class="line"><a name="l03771"></a><span class="lineno"> 3771</span> </div><div class="line"><a name="l03772"></a><span class="lineno"> 3772</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->set_intervals(new_size, <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals(i));</div><div class="line"><a name="l03773"></a><span class="lineno"> 3773</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->set_demands(new_size, <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->demands(i));</div><div class="line"><a name="l03774"></a><span class="lineno"> 3774</span>  <span class="keywordflow">if</span> (!<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->energies().empty()) {</div><div class="line"><a name="l03775"></a><span class="lineno"> 3775</span>  *<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->mutable_energies(new_size) = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->energies(i);</div><div class="line"><a name="l03776"></a><span class="lineno"> 3776</span>  }</div><div class="line"><a name="l03777"></a><span class="lineno"> 3777</span>  new_size++;</div><div class="line"><a name="l03778"></a><span class="lineno"> 3778</span>  }</div><div class="line"><a name="l03779"></a><span class="lineno"> 3779</span> </div><div class="line"><a name="l03780"></a><span class="lineno"> 3780</span>  <span class="keywordflow">if</span> (new_size < proto->intervals_size()) {</div><div class="line"><a name="l03781"></a><span class="lineno"> 3781</span>  changed = <span class="keyword">true</span>;</div><div class="line"><a name="l03782"></a><span class="lineno"> 3782</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->mutable_intervals()->Truncate(new_size);</div><div class="line"><a name="l03783"></a><span class="lineno"> 3783</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->mutable_demands()->Truncate(new_size);</div><div class="line"><a name="l03784"></a><span class="lineno"> 3784</span>  <span class="keywordflow">if</span> (!<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->energies().empty()) {</div><div class="line"><a name="l03785"></a><span class="lineno"> 3785</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->mutable_energies()->erase(</div><div class="line"><a name="l03786"></a><span class="lineno"> 3786</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->mutable_energies()->begin() + new_size,</div><div class="line"><a name="l03787"></a><span class="lineno"> 3787</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->mutable_energies()->end());</div><div class="line"><a name="l03788"></a><span class="lineno"> 3788</span>  }</div><div class="line"><a name="l03789"></a><span class="lineno"> 3789</span>  }</div><div class="line"><a name="l03790"></a><span class="lineno"> 3790</span> </div><div class="line"><a name="l03791"></a><span class="lineno"> 3791</span>  <span class="keywordflow">if</span> (num_zero_demand_removed > 0) {</div><div class="line"><a name="l03792"></a><span class="lineno"> 3792</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(</div><div class="line"><a name="l03793"></a><span class="lineno"> 3793</span>  <span class="stringliteral">"cumulative: removed intervals with no demands"</span>);</div><div class="line"><a name="l03794"></a><span class="lineno"> 3794</span>  }</div><div class="line"><a name="l03795"></a><span class="lineno"> 3795</span>  <span class="keywordflow">if</span> (num_zero_size_removed > 0) {</div><div class="line"><a name="l03796"></a><span class="lineno"> 3796</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(</div><div class="line"><a name="l03797"></a><span class="lineno"> 3797</span>  <span class="stringliteral">"cumulative: removed intervals with a size of zero"</span>);</div><div class="line"><a name="l03798"></a><span class="lineno"> 3798</span>  }</div><div class="line"><a name="l03799"></a><span class="lineno"> 3799</span>  <span class="keywordflow">if</span> (num_incompatible_demands > 0) {</div><div class="line"><a name="l03800"></a><span class="lineno"> 3800</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(</div><div class="line"><a name="l03801"></a><span class="lineno"> 3801</span>  <span class="stringliteral">"cumulative: removed intervals demands greater than the capacity"</span>);</div><div class="line"><a name="l03802"></a><span class="lineno"> 3802</span>  }</div><div class="line"><a name="l03803"></a><span class="lineno"> 3803</span>  }</div><div class="line"><a name="l03804"></a><span class="lineno"> 3804</span> </div><div class="line"><a name="l03805"></a><span class="lineno"> 3805</span>  <span class="comment">// Checks the compatibility of demands w.r.t. the capacity.</span></div><div class="line"><a name="l03806"></a><span class="lineno"> 3806</span>  {</div><div class="line"><a name="l03807"></a><span class="lineno"> 3807</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->demands_size(); ++i) {</div><div class="line"><a name="l03808"></a><span class="lineno"> 3808</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="resource_8cc.html#af92a8383a05fdf586a52263d358f5ada">interval</a> = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals(i);</div><div class="line"><a name="l03809"></a><span class="lineno"> 3809</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> demand_ref = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->demands(i);</div><div class="line"><a name="l03810"></a><span class="lineno"> 3810</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ad72f81052c0b904f369ac1cee7217b83">ConstraintIsOptional</a>(<a class="code" href="resource_8cc.html#af92a8383a05fdf586a52263d358f5ada">interval</a>)) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l03811"></a><span class="lineno"> 3811</span>  <span class="keywordtype">bool</span> domain_changed = <span class="keyword">false</span>;</div><div class="line"><a name="l03812"></a><span class="lineno"> 3812</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(demand_ref, {0, capacity_max},</div><div class="line"><a name="l03813"></a><span class="lineno"> 3813</span>  &domain_changed)) {</div><div class="line"><a name="l03814"></a><span class="lineno"> 3814</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l03815"></a><span class="lineno"> 3815</span>  }</div><div class="line"><a name="l03816"></a><span class="lineno"> 3816</span>  <span class="keywordflow">if</span> (domain_changed) {</div><div class="line"><a name="l03817"></a><span class="lineno"> 3817</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(</div><div class="line"><a name="l03818"></a><span class="lineno"> 3818</span>  <span class="stringliteral">"cumulative: fit demand in [0..capacity_max]"</span>);</div><div class="line"><a name="l03819"></a><span class="lineno"> 3819</span>  }</div><div class="line"><a name="l03820"></a><span class="lineno"> 3820</span>  }</div><div class="line"><a name="l03821"></a><span class="lineno"> 3821</span>  }</div><div class="line"><a name="l03822"></a><span class="lineno"> 3822</span> </div><div class="line"><a name="l03823"></a><span class="lineno"> 3823</span>  <span class="comment">// Split constraints in disjoint sets.</span></div><div class="line"><a name="l03824"></a><span class="lineno"> 3824</span>  <span class="comment">//</span></div><div class="line"><a name="l03825"></a><span class="lineno"> 3825</span>  <span class="comment">// TODO(user): This can be improved:</span></div><div class="line"><a name="l03826"></a><span class="lineno"> 3826</span>  <span class="comment">// If we detect bridge nodes in the graph of overlapping components, we</span></div><div class="line"><a name="l03827"></a><span class="lineno"> 3827</span>  <span class="comment">// can split the graph around the bridge and add the bridge node to both</span></div><div class="line"><a name="l03828"></a><span class="lineno"> 3828</span>  <span class="comment">// side. Note that if it we take into account precedences between intervals,</span></div><div class="line"><a name="l03829"></a><span class="lineno"> 3829</span>  <span class="comment">// we can detect more bridges.</span></div><div class="line"><a name="l03830"></a><span class="lineno"> 3830</span>  <span class="keywordflow">if</span> (<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals_size() > 1) {</div><div class="line"><a name="l03831"></a><span class="lineno"> 3831</span>  std::vector<IndexedInterval> indexed_intervals;</div><div class="line"><a name="l03832"></a><span class="lineno"> 3832</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals().size(); ++i) {</div><div class="line"><a name="l03833"></a><span class="lineno"> 3833</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="pack_8cc.html#a750b5d744c39a06bfb13e6eb010e35d0">index</a> = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals(i);</div><div class="line"><a name="l03834"></a><span class="lineno"> 3834</span>  indexed_intervals.push_back({i, IntegerValue(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a308f62525f1941cc6ef7f943bd2c4c18">StartMin</a>(<a class="code" href="pack_8cc.html#a750b5d744c39a06bfb13e6eb010e35d0">index</a>)),</div><div class="line"><a name="l03835"></a><span class="lineno"> 3835</span>  IntegerValue(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ad6ab55f6b68272caeaf24ff0d69818a4">EndMax</a>(<a class="code" href="pack_8cc.html#a750b5d744c39a06bfb13e6eb010e35d0">index</a>))});</div><div class="line"><a name="l03836"></a><span class="lineno"> 3836</span>  }</div><div class="line"><a name="l03837"></a><span class="lineno"> 3837</span>  std::vector<std::vector<int>> components;</div><div class="line"><a name="l03838"></a><span class="lineno"> 3838</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a3087cde516cefe9797be88d14a80079b">GetOverlappingIntervalComponents</a>(&indexed_intervals, &components);</div><div class="line"><a name="l03839"></a><span class="lineno"> 3839</span> </div><div class="line"><a name="l03840"></a><span class="lineno"> 3840</span>  <span class="keywordflow">if</span> (components.size() > 1) {</div><div class="line"><a name="l03841"></a><span class="lineno"> 3841</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> std::vector<int>& component : components) {</div><div class="line"><a name="l03842"></a><span class="lineno"> 3842</span>  CumulativeConstraintProto* new_cumulative =</div><div class="line"><a name="l03843"></a><span class="lineno"> 3843</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>()-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#af38f28b635c417041188c1f4e309903b">mutable_cumulative</a>();</div><div class="line"><a name="l03844"></a><span class="lineno"> 3844</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> i : component) {</div><div class="line"><a name="l03845"></a><span class="lineno"> 3845</span>  new_cumulative-><a class="code" href="classoperations__research_1_1sat_1_1_cumulative_constraint_proto.html#a3b0dc4db1d51bd6be689f9b0e18e5089">add_intervals</a>(<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals(i));</div><div class="line"><a name="l03846"></a><span class="lineno"> 3846</span>  new_cumulative->add_demands(<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->demands(i));</div><div class="line"><a name="l03847"></a><span class="lineno"> 3847</span>  }</div><div class="line"><a name="l03848"></a><span class="lineno"> 3848</span>  new_cumulative->set_capacity(<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->capacity());</div><div class="line"><a name="l03849"></a><span class="lineno"> 3849</span>  }</div><div class="line"><a name="l03850"></a><span class="lineno"> 3850</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l03851"></a><span class="lineno"> 3851</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"cumulative: split into disjoint components"</span>);</div><div class="line"><a name="l03852"></a><span class="lineno"> 3852</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l03853"></a><span class="lineno"> 3853</span>  }</div><div class="line"><a name="l03854"></a><span class="lineno"> 3854</span>  }</div><div class="line"><a name="l03855"></a><span class="lineno"> 3855</span> </div><div class="line"><a name="l03856"></a><span class="lineno"> 3856</span>  <span class="comment">// TODO(user): move the algorithmic part of what we do below in a</span></div><div class="line"><a name="l03857"></a><span class="lineno"> 3857</span>  <span class="comment">// separate function to unit test it more properly.</span></div><div class="line"><a name="l03858"></a><span class="lineno"> 3858</span>  {</div><div class="line"><a name="l03859"></a><span class="lineno"> 3859</span>  <span class="comment">// Build max load profiles.</span></div><div class="line"><a name="l03860"></a><span class="lineno"> 3860</span>  std::map<int64_t, int64_t> time_to_demand_deltas;</div><div class="line"><a name="l03861"></a><span class="lineno"> 3861</span>  <span class="keyword">const</span> int64_t capacity_min = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->capacity());</div><div class="line"><a name="l03862"></a><span class="lineno"> 3862</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals_size(); ++i) {</div><div class="line"><a name="l03863"></a><span class="lineno"> 3863</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> interval_index = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals(i);</div><div class="line"><a name="l03864"></a><span class="lineno"> 3864</span>  <span class="keyword">const</span> int64_t demand_max = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a00f995618e00d575372ff823a12553a9">MaxOf</a>(<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->demands(i));</div><div class="line"><a name="l03865"></a><span class="lineno"> 3865</span>  time_to_demand_deltas[context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a308f62525f1941cc6ef7f943bd2c4c18">StartMin</a>(interval_index)] += demand_max;</div><div class="line"><a name="l03866"></a><span class="lineno"> 3866</span>  time_to_demand_deltas[context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ad6ab55f6b68272caeaf24ff0d69818a4">EndMax</a>(interval_index)] -= demand_max;</div><div class="line"><a name="l03867"></a><span class="lineno"> 3867</span>  }</div><div class="line"><a name="l03868"></a><span class="lineno"> 3868</span> </div><div class="line"><a name="l03869"></a><span class="lineno"> 3869</span>  <span class="comment">// We construct the profile which correspond to a set of [time, next_time)</span></div><div class="line"><a name="l03870"></a><span class="lineno"> 3870</span>  <span class="comment">// to max_profile height. And for each time in our discrete set of times</span></div><div class="line"><a name="l03871"></a><span class="lineno"> 3871</span>  <span class="comment">// (all the start_min and end_max) we count for how often the height was</span></div><div class="line"><a name="l03872"></a><span class="lineno"> 3872</span>  <span class="comment">// above the capacity before this time.</span></div><div class="line"><a name="l03873"></a><span class="lineno"> 3873</span>  <span class="comment">//</span></div><div class="line"><a name="l03874"></a><span class="lineno"> 3874</span>  <span class="comment">// This rely on the iteration in sorted order.</span></div><div class="line"><a name="l03875"></a><span class="lineno"> 3875</span>  <span class="keywordtype">int</span> num_possible_overloads = 0;</div><div class="line"><a name="l03876"></a><span class="lineno"> 3876</span>  int64_t current_load = 0;</div><div class="line"><a name="l03877"></a><span class="lineno"> 3877</span>  absl::flat_hash_map<int64_t, int64_t> num_possible_overloads_before;</div><div class="line"><a name="l03878"></a><span class="lineno"> 3878</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span>& it : time_to_demand_deltas) {</div><div class="line"><a name="l03879"></a><span class="lineno"> 3879</span>  num_possible_overloads_before[it.first] = num_possible_overloads;</div><div class="line"><a name="l03880"></a><span class="lineno"> 3880</span>  current_load += it.second;</div><div class="line"><a name="l03881"></a><span class="lineno"> 3881</span>  <span class="keywordflow">if</span> (current_load > capacity_min) {</div><div class="line"><a name="l03882"></a><span class="lineno"> 3882</span>  ++num_possible_overloads;</div><div class="line"><a name="l03883"></a><span class="lineno"> 3883</span>  }</div><div class="line"><a name="l03884"></a><span class="lineno"> 3884</span>  }</div><div class="line"><a name="l03885"></a><span class="lineno"> 3885</span>  <a class="code" href="base_2logging_8h.html#a7c0ce053b28d53aa4eaf3eb7fb71663b">CHECK_EQ</a>(current_load, 0);</div><div class="line"><a name="l03886"></a><span class="lineno"> 3886</span> </div><div class="line"><a name="l03887"></a><span class="lineno"> 3887</span>  <span class="comment">// No possible overload with the min capacity.</span></div><div class="line"><a name="l03888"></a><span class="lineno"> 3888</span>  <span class="keywordflow">if</span> (num_possible_overloads == 0) {</div><div class="line"><a name="l03889"></a><span class="lineno"> 3889</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(</div><div class="line"><a name="l03890"></a><span class="lineno"> 3890</span>  <span class="stringliteral">"cumulative: max profile is always under the min capacity"</span>);</div><div class="line"><a name="l03891"></a><span class="lineno"> 3891</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l03892"></a><span class="lineno"> 3892</span>  }</div><div class="line"><a name="l03893"></a><span class="lineno"> 3893</span> </div><div class="line"><a name="l03894"></a><span class="lineno"> 3894</span>  <span class="comment">// An interval that does not intersect with the potential_overload_domains</span></div><div class="line"><a name="l03895"></a><span class="lineno"> 3895</span>  <span class="comment">// cannot contribute to a conflict. We can safely remove them.</span></div><div class="line"><a name="l03896"></a><span class="lineno"> 3896</span>  <span class="comment">//</span></div><div class="line"><a name="l03897"></a><span class="lineno"> 3897</span>  <span class="comment">// This is an extension of the presolve rule from</span></div><div class="line"><a name="l03898"></a><span class="lineno"> 3898</span>  <span class="comment">// "Presolving techniques and linear relaxations for cumulative</span></div><div class="line"><a name="l03899"></a><span class="lineno"> 3899</span>  <span class="comment">// scheduling" PhD dissertation by Stefan Heinz, ZIB.</span></div><div class="line"><a name="l03900"></a><span class="lineno"> 3900</span>  <span class="keywordtype">int</span> new_size = 0;</div><div class="line"><a name="l03901"></a><span class="lineno"> 3901</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals_size(); ++i) {</div><div class="line"><a name="l03902"></a><span class="lineno"> 3902</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="pack_8cc.html#a750b5d744c39a06bfb13e6eb010e35d0">index</a> = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals(i);</div><div class="line"><a name="l03903"></a><span class="lineno"> 3903</span>  <span class="keyword">const</span> int64_t <a class="code" href="sched__constraints_8cc.html#a826c744af066625acb241b17ae3e2be9">start_min</a> = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a308f62525f1941cc6ef7f943bd2c4c18">StartMin</a>(<a class="code" href="pack_8cc.html#a750b5d744c39a06bfb13e6eb010e35d0">index</a>);</div><div class="line"><a name="l03904"></a><span class="lineno"> 3904</span>  <span class="keyword">const</span> int64_t <a class="code" href="sched__constraints_8cc.html#a368fa95d42fa4962a75cedd9df656694">end_max</a> = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ad6ab55f6b68272caeaf24ff0d69818a4">EndMax</a>(<a class="code" href="pack_8cc.html#a750b5d744c39a06bfb13e6eb010e35d0">index</a>);</div><div class="line"><a name="l03905"></a><span class="lineno"> 3905</span> </div><div class="line"><a name="l03906"></a><span class="lineno"> 3906</span>  <span class="comment">// In the cumulative, if start_min == end_max, the interval is of size</span></div><div class="line"><a name="l03907"></a><span class="lineno"> 3907</span>  <span class="comment">// zero and we can just ignore it. If the model is unsat or the interval</span></div><div class="line"><a name="l03908"></a><span class="lineno"> 3908</span>  <span class="comment">// must be absent (start_min > end_max), this should be dealt with at</span></div><div class="line"><a name="l03909"></a><span class="lineno"> 3909</span>  <span class="comment">// the interval constraint level and we can just remove it from here.</span></div><div class="line"><a name="l03910"></a><span class="lineno"> 3910</span>  <span class="comment">//</span></div><div class="line"><a name="l03911"></a><span class="lineno"> 3911</span>  <span class="comment">// Note that currently, the interpretation for interval of length zero</span></div><div class="line"><a name="l03912"></a><span class="lineno"> 3912</span>  <span class="comment">// is different for the no-overlap constraint.</span></div><div class="line"><a name="l03913"></a><span class="lineno"> 3913</span>  <span class="keywordflow">if</span> (<a class="code" href="sched__constraints_8cc.html#a826c744af066625acb241b17ae3e2be9">start_min</a> >= <a class="code" href="sched__constraints_8cc.html#a368fa95d42fa4962a75cedd9df656694">end_max</a>) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l03914"></a><span class="lineno"> 3914</span> </div><div class="line"><a name="l03915"></a><span class="lineno"> 3915</span>  <span class="comment">// Note that by construction, both point are in the map. The formula</span></div><div class="line"><a name="l03916"></a><span class="lineno"> 3916</span>  <span class="comment">// counts exactly for how many times in [start_min, end_max), we have a</span></div><div class="line"><a name="l03917"></a><span class="lineno"> 3917</span>  <span class="comment">// point in our discrete set of time that exceeded the capacity. Because</span></div><div class="line"><a name="l03918"></a><span class="lineno"> 3918</span>  <span class="comment">// we included all the relevant points, this works.</span></div><div class="line"><a name="l03919"></a><span class="lineno"> 3919</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> num_diff = num_possible_overloads_before.at(<a class="code" href="sched__constraints_8cc.html#a368fa95d42fa4962a75cedd9df656694">end_max</a>) -</div><div class="line"><a name="l03920"></a><span class="lineno"> 3920</span>  num_possible_overloads_before.at(<a class="code" href="sched__constraints_8cc.html#a826c744af066625acb241b17ae3e2be9">start_min</a>);</div><div class="line"><a name="l03921"></a><span class="lineno"> 3921</span>  <span class="keywordflow">if</span> (num_diff == 0) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l03922"></a><span class="lineno"> 3922</span> </div><div class="line"><a name="l03923"></a><span class="lineno"> 3923</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->set_intervals(new_size, <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals(i));</div><div class="line"><a name="l03924"></a><span class="lineno"> 3924</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->set_demands(new_size, <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->demands(i));</div><div class="line"><a name="l03925"></a><span class="lineno"> 3925</span>  new_size++;</div><div class="line"><a name="l03926"></a><span class="lineno"> 3926</span>  }</div><div class="line"><a name="l03927"></a><span class="lineno"> 3927</span> </div><div class="line"><a name="l03928"></a><span class="lineno"> 3928</span>  <span class="keywordflow">if</span> (new_size < proto->intervals_size()) {</div><div class="line"><a name="l03929"></a><span class="lineno"> 3929</span>  changed = <span class="keyword">true</span>;</div><div class="line"><a name="l03930"></a><span class="lineno"> 3930</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->mutable_intervals()->Truncate(new_size);</div><div class="line"><a name="l03931"></a><span class="lineno"> 3931</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->mutable_demands()->Truncate(new_size);</div><div class="line"><a name="l03932"></a><span class="lineno"> 3932</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(</div><div class="line"><a name="l03933"></a><span class="lineno"> 3933</span>  <span class="stringliteral">"cumulative: remove never conflicting intervals."</span>);</div><div class="line"><a name="l03934"></a><span class="lineno"> 3934</span>  }</div><div class="line"><a name="l03935"></a><span class="lineno"> 3935</span>  }</div><div class="line"><a name="l03936"></a><span class="lineno"> 3936</span> </div><div class="line"><a name="l03937"></a><span class="lineno"> 3937</span>  <span class="keywordflow">if</span> (<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals().empty()) {</div><div class="line"><a name="l03938"></a><span class="lineno"> 3938</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"cumulative: no intervals"</span>);</div><div class="line"><a name="l03939"></a><span class="lineno"> 3939</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l03940"></a><span class="lineno"> 3940</span>  }</div><div class="line"><a name="l03941"></a><span class="lineno"> 3941</span> </div><div class="line"><a name="l03942"></a><span class="lineno"> 3942</span>  {</div><div class="line"><a name="l03943"></a><span class="lineno"> 3943</span>  int64_t max_of_performed_demand_mins = 0;</div><div class="line"><a name="l03944"></a><span class="lineno"> 3944</span>  int64_t sum_of_max_demands = 0;</div><div class="line"><a name="l03945"></a><span class="lineno"> 3945</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals_size(); ++i) {</div><div class="line"><a name="l03946"></a><span class="lineno"> 3946</span>  <span class="keyword">const</span> ConstraintProto& interval_ct =</div><div class="line"><a name="l03947"></a><span class="lineno"> 3947</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#afce66afa8ae7776a449bba7313ea3559">constraints</a>(<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals(i));</div><div class="line"><a name="l03948"></a><span class="lineno"> 3948</span> </div><div class="line"><a name="l03949"></a><span class="lineno"> 3949</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> demand_ref = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->demands(i);</div><div class="line"><a name="l03950"></a><span class="lineno"> 3950</span>  sum_of_max_demands += context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a00f995618e00d575372ff823a12553a9">MaxOf</a>(demand_ref);</div><div class="line"><a name="l03951"></a><span class="lineno"> 3951</span> </div><div class="line"><a name="l03952"></a><span class="lineno"> 3952</span>  <span class="keywordflow">if</span> (interval_ct.enforcement_literal().empty()) {</div><div class="line"><a name="l03953"></a><span class="lineno"> 3953</span>  max_of_performed_demand_mins =</div><div class="line"><a name="l03954"></a><span class="lineno"> 3954</span>  <a class="code" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::max</a>(max_of_performed_demand_mins, context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(demand_ref));</div><div class="line"><a name="l03955"></a><span class="lineno"> 3955</span>  }</div><div class="line"><a name="l03956"></a><span class="lineno"> 3956</span>  }</div><div class="line"><a name="l03957"></a><span class="lineno"> 3957</span> </div><div class="line"><a name="l03958"></a><span class="lineno"> 3958</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> capacity_ref = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->capacity();</div><div class="line"><a name="l03959"></a><span class="lineno"> 3959</span>  <span class="keywordflow">if</span> (max_of_performed_demand_mins > context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(capacity_ref)) {</div><div class="line"><a name="l03960"></a><span class="lineno"> 3960</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"cumulative: propagate min capacity."</span>);</div><div class="line"><a name="l03961"></a><span class="lineno"> 3961</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(</div><div class="line"><a name="l03962"></a><span class="lineno"> 3962</span>  capacity_ref, Domain(max_of_performed_demand_mins,</div><div class="line"><a name="l03963"></a><span class="lineno"> 3963</span>  <a class="code" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::numeric_limits<int64_t>::max</a>()))) {</div><div class="line"><a name="l03964"></a><span class="lineno"> 3964</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l03965"></a><span class="lineno"> 3965</span>  }</div><div class="line"><a name="l03966"></a><span class="lineno"> 3966</span>  }</div><div class="line"><a name="l03967"></a><span class="lineno"> 3967</span> </div><div class="line"><a name="l03968"></a><span class="lineno"> 3968</span>  <span class="keywordflow">if</span> (max_of_performed_demand_mins > context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a00f995618e00d575372ff823a12553a9">MaxOf</a>(capacity_ref)) {</div><div class="line"><a name="l03969"></a><span class="lineno"> 3969</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"cumulative: cannot fit performed demands"</span>);</div><div class="line"><a name="l03970"></a><span class="lineno"> 3970</span>  <span class="keywordflow">return</span> context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5aa53538ba8adaa0bea1c3c0727425b0">NotifyThatModelIsUnsat</a>();</div><div class="line"><a name="l03971"></a><span class="lineno"> 3971</span>  }</div><div class="line"><a name="l03972"></a><span class="lineno"> 3972</span> </div><div class="line"><a name="l03973"></a><span class="lineno"> 3973</span>  <span class="keywordflow">if</span> (sum_of_max_demands <= context_->MinOf(capacity_ref)) {</div><div class="line"><a name="l03974"></a><span class="lineno"> 3974</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"cumulative: capacity exceeds sum of demands"</span>);</div><div class="line"><a name="l03975"></a><span class="lineno"> 3975</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l03976"></a><span class="lineno"> 3976</span>  }</div><div class="line"><a name="l03977"></a><span class="lineno"> 3977</span>  }</div><div class="line"><a name="l03978"></a><span class="lineno"> 3978</span> </div><div class="line"><a name="l03979"></a><span class="lineno"> 3979</span>  <span class="keywordflow">if</span> (num_fixed_demands == <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals_size() &&</div><div class="line"><a name="l03980"></a><span class="lineno"> 3980</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#abb6eb29f56c3a33b8ae1b74b08b755c2">IsFixed</a>(<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->capacity())) {</div><div class="line"><a name="l03981"></a><span class="lineno"> 3981</span>  int64_t gcd = 0;</div><div class="line"><a name="l03982"></a><span class="lineno"> 3982</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->cumulative().demands_size(); ++i) {</div><div class="line"><a name="l03983"></a><span class="lineno"> 3983</span>  <span class="keyword">const</span> int64_t <a class="code" href="resource_8cc.html#a29fb0dd9484d890b12b280c41c150e20">demand</a> = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->cumulative().demands(i));</div><div class="line"><a name="l03984"></a><span class="lineno"> 3984</span>  gcd = <a class="code" href="classoperations__research_1_1_math_util.html#ae94db7b2fa1d8e1b3c1dc6c683191609">MathUtil::GCD64</a>(gcd, <a class="code" href="resource_8cc.html#a29fb0dd9484d890b12b280c41c150e20">demand</a>);</div><div class="line"><a name="l03985"></a><span class="lineno"> 3985</span>  <span class="keywordflow">if</span> (gcd == 1) <span class="keywordflow">break</span>;</div><div class="line"><a name="l03986"></a><span class="lineno"> 3986</span>  }</div><div class="line"><a name="l03987"></a><span class="lineno"> 3987</span>  <span class="keywordflow">if</span> (gcd > 1) {</div><div class="line"><a name="l03988"></a><span class="lineno"> 3988</span>  changed = <span class="keyword">true</span>;</div><div class="line"><a name="l03989"></a><span class="lineno"> 3989</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->cumulative().demands_size(); ++i) {</div><div class="line"><a name="l03990"></a><span class="lineno"> 3990</span>  <span class="keyword">const</span> int64_t <a class="code" href="resource_8cc.html#a29fb0dd9484d890b12b280c41c150e20">demand</a> = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->cumulative().demands(i));</div><div class="line"><a name="l03991"></a><span class="lineno"> 3991</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->set_demands(i, context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ada5d036ab04018d9ee3ed60888843102">GetOrCreateConstantVar</a>(<a class="code" href="resource_8cc.html#a29fb0dd9484d890b12b280c41c150e20">demand</a> / gcd));</div><div class="line"><a name="l03992"></a><span class="lineno"> 3992</span>  }</div><div class="line"><a name="l03993"></a><span class="lineno"> 3993</span> </div><div class="line"><a name="l03994"></a><span class="lineno"> 3994</span>  <span class="comment">// In this case, since the demands are fixed, the energy is linear and</span></div><div class="line"><a name="l03995"></a><span class="lineno"> 3995</span>  <span class="comment">// we don't need any user provided formula.</span></div><div class="line"><a name="l03996"></a><span class="lineno"> 3996</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_cumulative()->clear_energies();</div><div class="line"><a name="l03997"></a><span class="lineno"> 3997</span> </div><div class="line"><a name="l03998"></a><span class="lineno"> 3998</span>  <span class="keyword">const</span> int64_t old_capacity = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->capacity());</div><div class="line"><a name="l03999"></a><span class="lineno"> 3999</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->set_capacity(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ada5d036ab04018d9ee3ed60888843102">GetOrCreateConstantVar</a>(old_capacity / gcd));</div><div class="line"><a name="l04000"></a><span class="lineno"> 4000</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(</div><div class="line"><a name="l04001"></a><span class="lineno"> 4001</span>  <span class="stringliteral">"cumulative: divide demands and capacity by gcd"</span>);</div><div class="line"><a name="l04002"></a><span class="lineno"> 4002</span>  }</div><div class="line"><a name="l04003"></a><span class="lineno"> 4003</span>  }</div><div class="line"><a name="l04004"></a><span class="lineno"> 4004</span> </div><div class="line"><a name="l04005"></a><span class="lineno"> 4005</span>  <span class="comment">// Canonicalize energy linear expressions.</span></div><div class="line"><a name="l04006"></a><span class="lineno"> 4006</span>  <span class="keywordflow">for</span> (LinearExpressionProto& exp :</div><div class="line"><a name="l04007"></a><span class="lineno"> 4007</span>  *(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_cumulative()->mutable_energies())) {</div><div class="line"><a name="l04008"></a><span class="lineno"> 4008</span>  changed |= CanonicalizeLinearExpression(*<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>, &exp);</div><div class="line"><a name="l04009"></a><span class="lineno"> 4009</span>  }</div><div class="line"><a name="l04010"></a><span class="lineno"> 4010</span> </div><div class="line"><a name="l04011"></a><span class="lineno"> 4011</span>  <span class="keywordflow">if</span> (<a class="code" href="namespaceoperations__research_1_1sat.html#a42a3b266d8c6dfab1c14baa6c04e2333">HasEnforcementLiteral</a>(*<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) <span class="keywordflow">return</span> changed;</div><div class="line"><a name="l04012"></a><span class="lineno"> 4012</span> </div><div class="line"><a name="l04013"></a><span class="lineno"> 4013</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> num_intervals = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals_size();</div><div class="line"><a name="l04014"></a><span class="lineno"> 4014</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> capacity_ref = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->capacity();</div><div class="line"><a name="l04015"></a><span class="lineno"> 4015</span> </div><div class="line"><a name="l04016"></a><span class="lineno"> 4016</span>  <span class="keywordtype">bool</span> with_start_view = <span class="keyword">false</span>;</div><div class="line"><a name="l04017"></a><span class="lineno"> 4017</span>  std::vector<int> start_refs(num_intervals, -1);</div><div class="line"><a name="l04018"></a><span class="lineno"> 4018</span> </div><div class="line"><a name="l04019"></a><span class="lineno"> 4019</span>  <span class="keywordtype">int</span> num_duration_one = 0;</div><div class="line"><a name="l04020"></a><span class="lineno"> 4020</span>  <span class="keywordtype">int</span> num_greater_half_capacity = 0;</div><div class="line"><a name="l04021"></a><span class="lineno"> 4021</span> </div><div class="line"><a name="l04022"></a><span class="lineno"> 4022</span>  <span class="keywordtype">bool</span> has_optional_interval = <span class="keyword">false</span>;</div><div class="line"><a name="l04023"></a><span class="lineno"> 4023</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num_intervals; ++i) {</div><div class="line"><a name="l04024"></a><span class="lineno"> 4024</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="pack_8cc.html#a750b5d744c39a06bfb13e6eb010e35d0">index</a> = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals(i);</div><div class="line"><a name="l04025"></a><span class="lineno"> 4025</span>  <span class="comment">// TODO(user): adapt in the presence of optional intervals.</span></div><div class="line"><a name="l04026"></a><span class="lineno"> 4026</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ad72f81052c0b904f369ac1cee7217b83">ConstraintIsOptional</a>(<a class="code" href="pack_8cc.html#a750b5d744c39a06bfb13e6eb010e35d0">index</a>)) has_optional_interval = <span class="keyword">true</span>;</div><div class="line"><a name="l04027"></a><span class="lineno"> 4027</span>  <span class="keyword">const</span> ConstraintProto& <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a> =</div><div class="line"><a name="l04028"></a><span class="lineno"> 4028</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#afce66afa8ae7776a449bba7313ea3559">constraints</a>(<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals(i));</div><div class="line"><a name="l04029"></a><span class="lineno"> 4029</span>  <span class="keyword">const</span> IntervalConstraintProto& <a class="code" href="resource_8cc.html#af92a8383a05fdf586a52263d358f5ada">interval</a> = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.interval();</div><div class="line"><a name="l04030"></a><span class="lineno"> 4030</span>  <span class="keywordflow">if</span> (<a class="code" href="resource_8cc.html#af92a8383a05fdf586a52263d358f5ada">interval</a>.has_start_view()) with_start_view = <span class="keyword">true</span>;</div><div class="line"><a name="l04031"></a><span class="lineno"> 4031</span>  start_refs[i] = <a class="code" href="resource_8cc.html#af92a8383a05fdf586a52263d358f5ada">interval</a>.start();</div><div class="line"><a name="l04032"></a><span class="lineno"> 4032</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> demand_ref = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->demands(i);</div><div class="line"><a name="l04033"></a><span class="lineno"> 4033</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aef0a687ec05a3e5dd7aa78745e9fb382">SizeMin</a>(<a class="code" href="pack_8cc.html#a750b5d744c39a06bfb13e6eb010e35d0">index</a>) == 1 && context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ae3ad719e8a03c11498d2d0ab18558f95">SizeMax</a>(<a class="code" href="pack_8cc.html#a750b5d744c39a06bfb13e6eb010e35d0">index</a>) == 1) {</div><div class="line"><a name="l04034"></a><span class="lineno"> 4034</span>  num_duration_one++;</div><div class="line"><a name="l04035"></a><span class="lineno"> 4035</span>  }</div><div class="line"><a name="l04036"></a><span class="lineno"> 4036</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aef0a687ec05a3e5dd7aa78745e9fb382">SizeMin</a>(<a class="code" href="pack_8cc.html#a750b5d744c39a06bfb13e6eb010e35d0">index</a>) == 0) {</div><div class="line"><a name="l04037"></a><span class="lineno"> 4037</span>  <span class="comment">// The behavior for zero-duration interval is currently not the same in</span></div><div class="line"><a name="l04038"></a><span class="lineno"> 4038</span>  <span class="comment">// the no-overlap and the cumulative constraint.</span></div><div class="line"><a name="l04039"></a><span class="lineno"> 4039</span>  <span class="keywordflow">return</span> changed;</div><div class="line"><a name="l04040"></a><span class="lineno"> 4040</span>  }</div><div class="line"><a name="l04041"></a><span class="lineno"> 4041</span>  <span class="keyword">const</span> int64_t demand_min = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(demand_ref);</div><div class="line"><a name="l04042"></a><span class="lineno"> 4042</span>  <span class="keyword">const</span> int64_t demand_max = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a00f995618e00d575372ff823a12553a9">MaxOf</a>(demand_ref);</div><div class="line"><a name="l04043"></a><span class="lineno"> 4043</span>  <span class="keywordflow">if</span> (demand_min > capacity_max / 2) {</div><div class="line"><a name="l04044"></a><span class="lineno"> 4044</span>  num_greater_half_capacity++;</div><div class="line"><a name="l04045"></a><span class="lineno"> 4045</span>  }</div><div class="line"><a name="l04046"></a><span class="lineno"> 4046</span>  <span class="keywordflow">if</span> (demand_min > capacity_max) {</div><div class="line"><a name="l04047"></a><span class="lineno"> 4047</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"cumulative: demand_min exceeds capacity max"</span>);</div><div class="line"><a name="l04048"></a><span class="lineno"> 4048</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ad72f81052c0b904f369ac1cee7217b83">ConstraintIsOptional</a>(<a class="code" href="pack_8cc.html#a750b5d744c39a06bfb13e6eb010e35d0">index</a>)) {</div><div class="line"><a name="l04049"></a><span class="lineno"> 4049</span>  <span class="keywordflow">return</span> context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5aa53538ba8adaa0bea1c3c0727425b0">NotifyThatModelIsUnsat</a>();</div><div class="line"><a name="l04050"></a><span class="lineno"> 4050</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l04051"></a><span class="lineno"> 4051</span>  <a class="code" href="base_2logging_8h.html#a7c0ce053b28d53aa4eaf3eb7fb71663b">CHECK_EQ</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.enforcement_literal().size(), 1);</div><div class="line"><a name="l04052"></a><span class="lineno"> 4052</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ad0d1a630c07ba2321cf43d97a425bc30">SetLiteralToFalse</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.enforcement_literal(0))) {</div><div class="line"><a name="l04053"></a><span class="lineno"> 4053</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l04054"></a><span class="lineno"> 4054</span>  }</div><div class="line"><a name="l04055"></a><span class="lineno"> 4055</span>  }</div><div class="line"><a name="l04056"></a><span class="lineno"> 4056</span>  <span class="keywordflow">return</span> changed;</div><div class="line"><a name="l04057"></a><span class="lineno"> 4057</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (demand_max > capacity_max) {</div><div class="line"><a name="l04058"></a><span class="lineno"> 4058</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.enforcement_literal().empty()) {</div><div class="line"><a name="l04059"></a><span class="lineno"> 4059</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(</div><div class="line"><a name="l04060"></a><span class="lineno"> 4060</span>  <span class="stringliteral">"cumulative: demand_max exceeds capacity max."</span>);</div><div class="line"><a name="l04061"></a><span class="lineno"> 4061</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(</div><div class="line"><a name="l04062"></a><span class="lineno"> 4062</span>  demand_ref,</div><div class="line"><a name="l04063"></a><span class="lineno"> 4063</span>  Domain(<a class="code" href="alldiff__cst_8cc.html#ad10edae0a852d72fb76afb1c77735045">std::numeric_limits<int64_t>::min</a>(), capacity_max))) {</div><div class="line"><a name="l04064"></a><span class="lineno"> 4064</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l04065"></a><span class="lineno"> 4065</span>  }</div><div class="line"><a name="l04066"></a><span class="lineno"> 4066</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l04067"></a><span class="lineno"> 4067</span>  <span class="comment">// TODO(user): we abort because we cannot convert this to a no_overlap</span></div><div class="line"><a name="l04068"></a><span class="lineno"> 4068</span>  <span class="comment">// for instance.</span></div><div class="line"><a name="l04069"></a><span class="lineno"> 4069</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(</div><div class="line"><a name="l04070"></a><span class="lineno"> 4070</span>  <span class="stringliteral">"cumulative: demand_max of optional interval exceeds capacity."</span>);</div><div class="line"><a name="l04071"></a><span class="lineno"> 4071</span>  <span class="keywordflow">return</span> changed;</div><div class="line"><a name="l04072"></a><span class="lineno"> 4072</span>  }</div><div class="line"><a name="l04073"></a><span class="lineno"> 4073</span>  }</div><div class="line"><a name="l04074"></a><span class="lineno"> 4074</span>  }</div><div class="line"><a name="l04075"></a><span class="lineno"> 4075</span>  <span class="keywordflow">if</span> (num_greater_half_capacity == num_intervals) {</div><div class="line"><a name="l04076"></a><span class="lineno"> 4076</span>  <span class="keywordflow">if</span> (num_duration_one == num_intervals && !has_optional_interval &&</div><div class="line"><a name="l04077"></a><span class="lineno"> 4077</span>  !with_start_view) {</div><div class="line"><a name="l04078"></a><span class="lineno"> 4078</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"cumulative: convert to all_different"</span>);</div><div class="line"><a name="l04079"></a><span class="lineno"> 4079</span>  ConstraintProto* new_ct = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>();</div><div class="line"><a name="l04080"></a><span class="lineno"> 4080</span>  <span class="keyword">auto</span>* arg = new_ct-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ab09d50ac461e6e8704ba908d99856594">mutable_all_diff</a>();</div><div class="line"><a name="l04081"></a><span class="lineno"> 4081</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> : start_refs) arg-><a class="code" href="classoperations__research_1_1sat_1_1_all_different_constraint_proto.html#aecb2bc94116e771000e5be7f8e3a7f6c">add_vars</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l04082"></a><span class="lineno"> 4082</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l04083"></a><span class="lineno"> 4083</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l04084"></a><span class="lineno"> 4084</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l04085"></a><span class="lineno"> 4085</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"cumulative: convert to no_overlap"</span>);</div><div class="line"><a name="l04086"></a><span class="lineno"> 4086</span> </div><div class="line"><a name="l04087"></a><span class="lineno"> 4087</span>  <span class="comment">// Before we remove the cumulative, add constraints to enforce that the</span></div><div class="line"><a name="l04088"></a><span class="lineno"> 4088</span>  <span class="comment">// capacity is greater than the demand of any performed intervals.</span></div><div class="line"><a name="l04089"></a><span class="lineno"> 4089</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->demands_size(); ++i) {</div><div class="line"><a name="l04090"></a><span class="lineno"> 4090</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> demand_ref = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->demands(i);</div><div class="line"><a name="l04091"></a><span class="lineno"> 4091</span>  <span class="keyword">const</span> int64_t demand_max = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a00f995618e00d575372ff823a12553a9">MaxOf</a>(demand_ref);</div><div class="line"><a name="l04092"></a><span class="lineno"> 4092</span>  <span class="keywordflow">if</span> (demand_max > context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(capacity_ref)) {</div><div class="line"><a name="l04093"></a><span class="lineno"> 4093</span>  ConstraintProto* capacity_gt =</div><div class="line"><a name="l04094"></a><span class="lineno"> 4094</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>();</div><div class="line"><a name="l04095"></a><span class="lineno"> 4095</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a> :</div><div class="line"><a name="l04096"></a><span class="lineno"> 4096</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#afce66afa8ae7776a449bba7313ea3559">constraints</a>(<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals(i))</div><div class="line"><a name="l04097"></a><span class="lineno"> 4097</span>  .enforcement_literal()) {</div><div class="line"><a name="l04098"></a><span class="lineno"> 4098</span>  capacity_gt-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#acfab2074ffdcaf9686057126c5e29d38">add_enforcement_literal</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>);</div><div class="line"><a name="l04099"></a><span class="lineno"> 4099</span>  }</div><div class="line"><a name="l04100"></a><span class="lineno"> 4100</span>  capacity_gt->mutable_linear()->add_vars(capacity_ref);</div><div class="line"><a name="l04101"></a><span class="lineno"> 4101</span>  capacity_gt->mutable_linear()->add_coeffs(1);</div><div class="line"><a name="l04102"></a><span class="lineno"> 4102</span>  capacity_gt->mutable_linear()->add_vars(demand_ref);</div><div class="line"><a name="l04103"></a><span class="lineno"> 4103</span>  capacity_gt->mutable_linear()->add_coeffs(-1);</div><div class="line"><a name="l04104"></a><span class="lineno"> 4104</span>  capacity_gt->mutable_linear()->add_domain(0);</div><div class="line"><a name="l04105"></a><span class="lineno"> 4105</span>  capacity_gt->mutable_linear()->add_domain(</div><div class="line"><a name="l04106"></a><span class="lineno"> 4106</span>  <a class="code" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::numeric_limits<int64_t>::max</a>());</div><div class="line"><a name="l04107"></a><span class="lineno"> 4107</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l04108"></a><span class="lineno"> 4108</span>  }</div><div class="line"><a name="l04109"></a><span class="lineno"> 4109</span>  }</div><div class="line"><a name="l04110"></a><span class="lineno"> 4110</span> </div><div class="line"><a name="l04111"></a><span class="lineno"> 4111</span>  ConstraintProto* new_ct = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>();</div><div class="line"><a name="l04112"></a><span class="lineno"> 4112</span>  <span class="keyword">auto</span>* arg = new_ct-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a5e1ab39de2f5594036bacb1d1e803bbc">mutable_no_overlap</a>();</div><div class="line"><a name="l04113"></a><span class="lineno"> 4113</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="resource_8cc.html#af92a8383a05fdf586a52263d358f5ada">interval</a> : <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>->intervals()) {</div><div class="line"><a name="l04114"></a><span class="lineno"> 4114</span>  arg-><a class="code" href="classoperations__research_1_1sat_1_1_no_overlap_constraint_proto.html#a3b0dc4db1d51bd6be689f9b0e18e5089">add_intervals</a>(<a class="code" href="resource_8cc.html#af92a8383a05fdf586a52263d358f5ada">interval</a>);</div><div class="line"><a name="l04115"></a><span class="lineno"> 4115</span>  }</div><div class="line"><a name="l04116"></a><span class="lineno"> 4116</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l04117"></a><span class="lineno"> 4117</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l04118"></a><span class="lineno"> 4118</span>  }</div><div class="line"><a name="l04119"></a><span class="lineno"> 4119</span>  }</div><div class="line"><a name="l04120"></a><span class="lineno"> 4120</span> </div><div class="line"><a name="l04121"></a><span class="lineno"> 4121</span>  <span class="keywordflow">return</span> changed;</div><div class="line"><a name="l04122"></a><span class="lineno"> 4122</span> }</div><div class="line"><a name="l04123"></a><span class="lineno"> 4123</span> </div><div class="line"><a name="l04124"></a><span class="lineno"> 4124</span> <span class="keywordtype">bool</span> CpModelPresolver::PresolveRoutes(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l04125"></a><span class="lineno"> 4125</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l04126"></a><span class="lineno"> 4126</span>  <span class="keywordflow">if</span> (<a class="code" href="namespaceoperations__research_1_1sat.html#a42a3b266d8c6dfab1c14baa6c04e2333">HasEnforcementLiteral</a>(*<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l04127"></a><span class="lineno"> 4127</span>  RoutesConstraintProto& <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a> = *<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_routes();</div><div class="line"><a name="l04128"></a><span class="lineno"> 4128</span> </div><div class="line"><a name="l04129"></a><span class="lineno"> 4129</span>  <span class="keywordtype">int</span> new_size = 0;</div><div class="line"><a name="l04130"></a><span class="lineno"> 4130</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> num_arcs = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.literals_size();</div><div class="line"><a name="l04131"></a><span class="lineno"> 4131</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num_arcs; ++i) {</div><div class="line"><a name="l04132"></a><span class="lineno"> 4132</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> ref = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.literals(i);</div><div class="line"><a name="l04133"></a><span class="lineno"> 4133</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="routing__flow_8cc.html#a64e7efc5529154ba56903e75f5300990">tail</a> = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.tails(i);</div><div class="line"><a name="l04134"></a><span class="lineno"> 4134</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a> = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.heads(i);</div><div class="line"><a name="l04135"></a><span class="lineno"> 4135</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a9f3443b281c705edf1779f746637ad9b">LiteralIsFalse</a>(ref)) {</div><div class="line"><a name="l04136"></a><span class="lineno"> 4136</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"routes: removed false arcs"</span>);</div><div class="line"><a name="l04137"></a><span class="lineno"> 4137</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l04138"></a><span class="lineno"> 4138</span>  }</div><div class="line"><a name="l04139"></a><span class="lineno"> 4139</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.set_literals(new_size, ref);</div><div class="line"><a name="l04140"></a><span class="lineno"> 4140</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.set_tails(new_size, <a class="code" href="routing__flow_8cc.html#a64e7efc5529154ba56903e75f5300990">tail</a>);</div><div class="line"><a name="l04141"></a><span class="lineno"> 4141</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.set_heads(new_size, <a class="code" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>);</div><div class="line"><a name="l04142"></a><span class="lineno"> 4142</span>  ++new_size;</div><div class="line"><a name="l04143"></a><span class="lineno"> 4143</span>  }</div><div class="line"><a name="l04144"></a><span class="lineno"> 4144</span>  <span class="keywordflow">if</span> (new_size < num_arcs) {</div><div class="line"><a name="l04145"></a><span class="lineno"> 4145</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.mutable_literals()->Truncate(new_size);</div><div class="line"><a name="l04146"></a><span class="lineno"> 4146</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.mutable_tails()->Truncate(new_size);</div><div class="line"><a name="l04147"></a><span class="lineno"> 4147</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.mutable_heads()->Truncate(new_size);</div><div class="line"><a name="l04148"></a><span class="lineno"> 4148</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l04149"></a><span class="lineno"> 4149</span>  }</div><div class="line"><a name="l04150"></a><span class="lineno"> 4150</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l04151"></a><span class="lineno"> 4151</span> }</div><div class="line"><a name="l04152"></a><span class="lineno"> 4152</span> </div><div class="line"><a name="l04153"></a><span class="lineno"> 4153</span> <span class="keywordtype">bool</span> CpModelPresolver::PresolveCircuit(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l04154"></a><span class="lineno"> 4154</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l04155"></a><span class="lineno"> 4155</span>  <span class="keywordflow">if</span> (<a class="code" href="namespaceoperations__research_1_1sat.html#a42a3b266d8c6dfab1c14baa6c04e2333">HasEnforcementLiteral</a>(*<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l04156"></a><span class="lineno"> 4156</span>  CircuitConstraintProto& <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a> = *<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_circuit();</div><div class="line"><a name="l04157"></a><span class="lineno"> 4157</span> </div><div class="line"><a name="l04158"></a><span class="lineno"> 4158</span>  <span class="comment">// The indexing might not be dense, so fix that first.</span></div><div class="line"><a name="l04159"></a><span class="lineno"> 4159</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a8f4f9889ab3527ce5381ed32e2fae25a">ReindexArcs</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_circuit()->mutable_tails(),</div><div class="line"><a name="l04160"></a><span class="lineno"> 4160</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_circuit()->mutable_heads());</div><div class="line"><a name="l04161"></a><span class="lineno"> 4161</span> </div><div class="line"><a name="l04162"></a><span class="lineno"> 4162</span>  <span class="comment">// Convert the flat structure to a graph, note that we includes all the arcs</span></div><div class="line"><a name="l04163"></a><span class="lineno"> 4163</span>  <span class="comment">// here (even if they are at false).</span></div><div class="line"><a name="l04164"></a><span class="lineno"> 4164</span>  std::vector<std::vector<int>> incoming_arcs;</div><div class="line"><a name="l04165"></a><span class="lineno"> 4165</span>  std::vector<std::vector<int>> outgoing_arcs;</div><div class="line"><a name="l04166"></a><span class="lineno"> 4166</span>  <span class="keywordtype">int</span> num_nodes = 0;</div><div class="line"><a name="l04167"></a><span class="lineno"> 4167</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> num_arcs = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.literals_size();</div><div class="line"><a name="l04168"></a><span class="lineno"> 4168</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num_arcs; ++i) {</div><div class="line"><a name="l04169"></a><span class="lineno"> 4169</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> ref = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.literals(i);</div><div class="line"><a name="l04170"></a><span class="lineno"> 4170</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="routing__flow_8cc.html#a64e7efc5529154ba56903e75f5300990">tail</a> = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.tails(i);</div><div class="line"><a name="l04171"></a><span class="lineno"> 4171</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a> = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.heads(i);</div><div class="line"><a name="l04172"></a><span class="lineno"> 4172</span>  num_nodes = <a class="code" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::max</a>(num_nodes, <a class="code" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::max</a>(<a class="code" href="routing__flow_8cc.html#a64e7efc5529154ba56903e75f5300990">tail</a>, <a class="code" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>) + 1);</div><div class="line"><a name="l04173"></a><span class="lineno"> 4173</span>  <span class="keywordflow">if</span> (<a class="code" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::max</a>(<a class="code" href="routing__flow_8cc.html#a64e7efc5529154ba56903e75f5300990">tail</a>, <a class="code" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>) >= incoming_arcs.size()) {</div><div class="line"><a name="l04174"></a><span class="lineno"> 4174</span>  incoming_arcs.resize(<a class="code" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::max</a>(<a class="code" href="routing__flow_8cc.html#a64e7efc5529154ba56903e75f5300990">tail</a>, <a class="code" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>) + 1);</div><div class="line"><a name="l04175"></a><span class="lineno"> 4175</span>  outgoing_arcs.resize(<a class="code" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::max</a>(<a class="code" href="routing__flow_8cc.html#a64e7efc5529154ba56903e75f5300990">tail</a>, <a class="code" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>) + 1);</div><div class="line"><a name="l04176"></a><span class="lineno"> 4176</span>  }</div><div class="line"><a name="l04177"></a><span class="lineno"> 4177</span>  incoming_arcs[<a class="code" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>].push_back(ref);</div><div class="line"><a name="l04178"></a><span class="lineno"> 4178</span>  outgoing_arcs[<a class="code" href="routing__flow_8cc.html#a64e7efc5529154ba56903e75f5300990">tail</a>].push_back(ref);</div><div class="line"><a name="l04179"></a><span class="lineno"> 4179</span>  }</div><div class="line"><a name="l04180"></a><span class="lineno"> 4180</span> </div><div class="line"><a name="l04181"></a><span class="lineno"> 4181</span>  <span class="comment">// All the node must have some incoming and outgoing arcs.</span></div><div class="line"><a name="l04182"></a><span class="lineno"> 4182</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num_nodes; ++i) {</div><div class="line"><a name="l04183"></a><span class="lineno"> 4183</span>  <span class="keywordflow">if</span> (incoming_arcs[i].empty() || outgoing_arcs[i].empty()) {</div><div class="line"><a name="l04184"></a><span class="lineno"> 4184</span>  <span class="keywordflow">return</span> MarkConstraintAsFalse(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l04185"></a><span class="lineno"> 4185</span>  }</div><div class="line"><a name="l04186"></a><span class="lineno"> 4186</span>  }</div><div class="line"><a name="l04187"></a><span class="lineno"> 4187</span> </div><div class="line"><a name="l04188"></a><span class="lineno"> 4188</span>  <span class="comment">// Note that it is important to reach the fixed point here:</span></div><div class="line"><a name="l04189"></a><span class="lineno"> 4189</span>  <span class="comment">// One arc at true, then all other arc at false. This is because we rely</span></div><div class="line"><a name="l04190"></a><span class="lineno"> 4190</span>  <span class="comment">// on this in case the circuit is fully specified below.</span></div><div class="line"><a name="l04191"></a><span class="lineno"> 4191</span>  <span class="comment">//</span></div><div class="line"><a name="l04192"></a><span class="lineno"> 4192</span>  <span class="comment">// TODO(user): Use a better complexity if needed.</span></div><div class="line"><a name="l04193"></a><span class="lineno"> 4193</span>  <span class="keywordtype">bool</span> loop_again = <span class="keyword">true</span>;</div><div class="line"><a name="l04194"></a><span class="lineno"> 4194</span>  <span class="keywordtype">int</span> num_fixed_at_true = 0;</div><div class="line"><a name="l04195"></a><span class="lineno"> 4195</span>  <span class="keywordflow">while</span> (loop_again) {</div><div class="line"><a name="l04196"></a><span class="lineno"> 4196</span>  loop_again = <span class="keyword">false</span>;</div><div class="line"><a name="l04197"></a><span class="lineno"> 4197</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span>* node_to_refs : {&incoming_arcs, &outgoing_arcs}) {</div><div class="line"><a name="l04198"></a><span class="lineno"> 4198</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> std::vector<int>& refs : *node_to_refs) {</div><div class="line"><a name="l04199"></a><span class="lineno"> 4199</span>  <span class="keywordflow">if</span> (refs.size() == 1) {</div><div class="line"><a name="l04200"></a><span class="lineno"> 4200</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a890f923209473cf55ac002d1b14bd9e2">LiteralIsTrue</a>(refs.front())) {</div><div class="line"><a name="l04201"></a><span class="lineno"> 4201</span>  ++num_fixed_at_true;</div><div class="line"><a name="l04202"></a><span class="lineno"> 4202</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a37ed950834f3f3b427a707631fd745f4">SetLiteralToTrue</a>(refs.front())) <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l04203"></a><span class="lineno"> 4203</span>  }</div><div class="line"><a name="l04204"></a><span class="lineno"> 4204</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l04205"></a><span class="lineno"> 4205</span>  }</div><div class="line"><a name="l04206"></a><span class="lineno"> 4206</span> </div><div class="line"><a name="l04207"></a><span class="lineno"> 4207</span>  <span class="comment">// At most one true, so if there is one, mark all the other to false.</span></div><div class="line"><a name="l04208"></a><span class="lineno"> 4208</span>  <span class="keywordtype">int</span> num_true = 0;</div><div class="line"><a name="l04209"></a><span class="lineno"> 4209</span>  <span class="keywordtype">int</span> true_ref;</div><div class="line"><a name="l04210"></a><span class="lineno"> 4210</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> ref : refs) {</div><div class="line"><a name="l04211"></a><span class="lineno"> 4211</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a890f923209473cf55ac002d1b14bd9e2">LiteralIsTrue</a>(ref)) {</div><div class="line"><a name="l04212"></a><span class="lineno"> 4212</span>  ++num_true;</div><div class="line"><a name="l04213"></a><span class="lineno"> 4213</span>  true_ref = ref;</div><div class="line"><a name="l04214"></a><span class="lineno"> 4214</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l04215"></a><span class="lineno"> 4215</span>  }</div><div class="line"><a name="l04216"></a><span class="lineno"> 4216</span>  }</div><div class="line"><a name="l04217"></a><span class="lineno"> 4217</span>  <span class="keywordflow">if</span> (num_true > 1) {</div><div class="line"><a name="l04218"></a><span class="lineno"> 4218</span>  <span class="keywordflow">return</span> context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5aa53538ba8adaa0bea1c3c0727425b0">NotifyThatModelIsUnsat</a>();</div><div class="line"><a name="l04219"></a><span class="lineno"> 4219</span>  }</div><div class="line"><a name="l04220"></a><span class="lineno"> 4220</span>  <span class="keywordflow">if</span> (num_true == 1) {</div><div class="line"><a name="l04221"></a><span class="lineno"> 4221</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> ref : refs) {</div><div class="line"><a name="l04222"></a><span class="lineno"> 4222</span>  <span class="keywordflow">if</span> (ref != true_ref) {</div><div class="line"><a name="l04223"></a><span class="lineno"> 4223</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#abb6eb29f56c3a33b8ae1b74b08b755c2">IsFixed</a>(ref)) {</div><div class="line"><a name="l04224"></a><span class="lineno"> 4224</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"circuit: set literal to false."</span>);</div><div class="line"><a name="l04225"></a><span class="lineno"> 4225</span>  loop_again = <span class="keyword">true</span>;</div><div class="line"><a name="l04226"></a><span class="lineno"> 4226</span>  }</div><div class="line"><a name="l04227"></a><span class="lineno"> 4227</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ad0d1a630c07ba2321cf43d97a425bc30">SetLiteralToFalse</a>(ref)) <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l04228"></a><span class="lineno"> 4228</span>  }</div><div class="line"><a name="l04229"></a><span class="lineno"> 4229</span>  }</div><div class="line"><a name="l04230"></a><span class="lineno"> 4230</span>  }</div><div class="line"><a name="l04231"></a><span class="lineno"> 4231</span>  }</div><div class="line"><a name="l04232"></a><span class="lineno"> 4232</span>  }</div><div class="line"><a name="l04233"></a><span class="lineno"> 4233</span>  }</div><div class="line"><a name="l04234"></a><span class="lineno"> 4234</span>  <span class="keywordflow">if</span> (num_fixed_at_true > 0) {</div><div class="line"><a name="l04235"></a><span class="lineno"> 4235</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"circuit: fixed singleton arcs."</span>);</div><div class="line"><a name="l04236"></a><span class="lineno"> 4236</span>  }</div><div class="line"><a name="l04237"></a><span class="lineno"> 4237</span> </div><div class="line"><a name="l04238"></a><span class="lineno"> 4238</span>  <span class="comment">// Remove false arcs.</span></div><div class="line"><a name="l04239"></a><span class="lineno"> 4239</span>  <span class="keywordtype">int</span> new_size = 0;</div><div class="line"><a name="l04240"></a><span class="lineno"> 4240</span>  <span class="keywordtype">int</span> num_true = 0;</div><div class="line"><a name="l04241"></a><span class="lineno"> 4241</span>  <span class="keywordtype">int</span> circuit_start = -1;</div><div class="line"><a name="l04242"></a><span class="lineno"> 4242</span>  std::vector<int> <a class="code" href="constraint__solver_8cc.html#a395f613555f398dd389670bb4c2a4599">next</a>(num_nodes, -1);</div><div class="line"><a name="l04243"></a><span class="lineno"> 4243</span>  std::vector<int> new_in_degree(num_nodes, 0);</div><div class="line"><a name="l04244"></a><span class="lineno"> 4244</span>  std::vector<int> new_out_degree(num_nodes, 0);</div><div class="line"><a name="l04245"></a><span class="lineno"> 4245</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num_arcs; ++i) {</div><div class="line"><a name="l04246"></a><span class="lineno"> 4246</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> ref = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.literals(i);</div><div class="line"><a name="l04247"></a><span class="lineno"> 4247</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a9f3443b281c705edf1779f746637ad9b">LiteralIsFalse</a>(ref)) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l04248"></a><span class="lineno"> 4248</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a890f923209473cf55ac002d1b14bd9e2">LiteralIsTrue</a>(ref)) {</div><div class="line"><a name="l04249"></a><span class="lineno"> 4249</span>  <span class="keywordflow">if</span> (<a class="code" href="constraint__solver_8cc.html#a395f613555f398dd389670bb4c2a4599">next</a>[<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.tails(i)] != -1) {</div><div class="line"><a name="l04250"></a><span class="lineno"> 4250</span>  <span class="keywordflow">return</span> context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5aa53538ba8adaa0bea1c3c0727425b0">NotifyThatModelIsUnsat</a>();</div><div class="line"><a name="l04251"></a><span class="lineno"> 4251</span>  }</div><div class="line"><a name="l04252"></a><span class="lineno"> 4252</span>  <a class="code" href="constraint__solver_8cc.html#a395f613555f398dd389670bb4c2a4599">next</a>[<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.tails(i)] = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.heads(i);</div><div class="line"><a name="l04253"></a><span class="lineno"> 4253</span>  <span class="keywordflow">if</span> (<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.tails(i) != <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.heads(i)) {</div><div class="line"><a name="l04254"></a><span class="lineno"> 4254</span>  circuit_start = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.tails(i);</div><div class="line"><a name="l04255"></a><span class="lineno"> 4255</span>  }</div><div class="line"><a name="l04256"></a><span class="lineno"> 4256</span>  ++num_true;</div><div class="line"><a name="l04257"></a><span class="lineno"> 4257</span>  }</div><div class="line"><a name="l04258"></a><span class="lineno"> 4258</span>  ++new_out_degree[<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.tails(i)];</div><div class="line"><a name="l04259"></a><span class="lineno"> 4259</span>  ++new_in_degree[<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.heads(i)];</div><div class="line"><a name="l04260"></a><span class="lineno"> 4260</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.set_tails(new_size, <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.tails(i));</div><div class="line"><a name="l04261"></a><span class="lineno"> 4261</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.set_heads(new_size, <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.heads(i));</div><div class="line"><a name="l04262"></a><span class="lineno"> 4262</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.set_literals(new_size, <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.literals(i));</div><div class="line"><a name="l04263"></a><span class="lineno"> 4263</span>  ++new_size;</div><div class="line"><a name="l04264"></a><span class="lineno"> 4264</span>  }</div><div class="line"><a name="l04265"></a><span class="lineno"> 4265</span> </div><div class="line"><a name="l04266"></a><span class="lineno"> 4266</span>  <span class="comment">// Detect infeasibility due to a node having no more incoming or outgoing arc.</span></div><div class="line"><a name="l04267"></a><span class="lineno"> 4267</span>  <span class="comment">// This is a bit tricky because for now the meaning of the constraint says</span></div><div class="line"><a name="l04268"></a><span class="lineno"> 4268</span>  <span class="comment">// that all nodes that appear in at least one of the arcs must be in the</span></div><div class="line"><a name="l04269"></a><span class="lineno"> 4269</span>  <span class="comment">// circuit or have a self-arc. So if any such node ends up with an incoming or</span></div><div class="line"><a name="l04270"></a><span class="lineno"> 4270</span>  <span class="comment">// outgoing degree of zero once we remove false arcs then the constraint is</span></div><div class="line"><a name="l04271"></a><span class="lineno"> 4271</span>  <span class="comment">// infeasible!</span></div><div class="line"><a name="l04272"></a><span class="lineno"> 4272</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num_nodes; ++i) {</div><div class="line"><a name="l04273"></a><span class="lineno"> 4273</span>  <span class="keywordflow">if</span> (new_in_degree[i] == 0 || new_out_degree[i] == 0) {</div><div class="line"><a name="l04274"></a><span class="lineno"> 4274</span>  <span class="keywordflow">return</span> context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5aa53538ba8adaa0bea1c3c0727425b0">NotifyThatModelIsUnsat</a>();</div><div class="line"><a name="l04275"></a><span class="lineno"> 4275</span>  }</div><div class="line"><a name="l04276"></a><span class="lineno"> 4276</span>  }</div><div class="line"><a name="l04277"></a><span class="lineno"> 4277</span> </div><div class="line"><a name="l04278"></a><span class="lineno"> 4278</span>  <span class="comment">// Test if a subcircuit is already present.</span></div><div class="line"><a name="l04279"></a><span class="lineno"> 4279</span>  <span class="keywordflow">if</span> (circuit_start != -1) {</div><div class="line"><a name="l04280"></a><span class="lineno"> 4280</span>  std::vector<bool> visited(num_nodes, <span class="keyword">false</span>);</div><div class="line"><a name="l04281"></a><span class="lineno"> 4281</span>  <span class="keywordtype">int</span> current = circuit_start;</div><div class="line"><a name="l04282"></a><span class="lineno"> 4282</span>  <span class="keywordflow">while</span> (current != -1 && !visited[current]) {</div><div class="line"><a name="l04283"></a><span class="lineno"> 4283</span>  visited[current] = <span class="keyword">true</span>;</div><div class="line"><a name="l04284"></a><span class="lineno"> 4284</span>  current = <a class="code" href="constraint__solver_8cc.html#a395f613555f398dd389670bb4c2a4599">next</a>[current];</div><div class="line"><a name="l04285"></a><span class="lineno"> 4285</span>  }</div><div class="line"><a name="l04286"></a><span class="lineno"> 4286</span>  <span class="keywordflow">if</span> (current == circuit_start) {</div><div class="line"><a name="l04287"></a><span class="lineno"> 4287</span>  <span class="comment">// We have a sub-circuit! mark all other arc false except self-loop not in</span></div><div class="line"><a name="l04288"></a><span class="lineno"> 4288</span>  <span class="comment">// circuit.</span></div><div class="line"><a name="l04289"></a><span class="lineno"> 4289</span>  std::vector<bool> has_self_arc(num_nodes, <span class="keyword">false</span>);</div><div class="line"><a name="l04290"></a><span class="lineno"> 4290</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num_arcs; ++i) {</div><div class="line"><a name="l04291"></a><span class="lineno"> 4291</span>  <span class="keywordflow">if</span> (visited[<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.tails(i)]) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l04292"></a><span class="lineno"> 4292</span>  <span class="keywordflow">if</span> (<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.tails(i) == <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.heads(i)) {</div><div class="line"><a name="l04293"></a><span class="lineno"> 4293</span>  has_self_arc[<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.tails(i)] = <span class="keyword">true</span>;</div><div class="line"><a name="l04294"></a><span class="lineno"> 4294</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a37ed950834f3f3b427a707631fd745f4">SetLiteralToTrue</a>(<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.literals(i))) <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l04295"></a><span class="lineno"> 4295</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l04296"></a><span class="lineno"> 4296</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ad0d1a630c07ba2321cf43d97a425bc30">SetLiteralToFalse</a>(<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.literals(i))) <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l04297"></a><span class="lineno"> 4297</span>  }</div><div class="line"><a name="l04298"></a><span class="lineno"> 4298</span>  }</div><div class="line"><a name="l04299"></a><span class="lineno"> 4299</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> n = 0; n < num_nodes; ++n) {</div><div class="line"><a name="l04300"></a><span class="lineno"> 4300</span>  <span class="keywordflow">if</span> (!visited[n] && !has_self_arc[n]) {</div><div class="line"><a name="l04301"></a><span class="lineno"> 4301</span>  <span class="comment">// We have a subircuit, but it doesn't cover all the mandatory nodes.</span></div><div class="line"><a name="l04302"></a><span class="lineno"> 4302</span>  <span class="keywordflow">return</span> MarkConstraintAsFalse(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l04303"></a><span class="lineno"> 4303</span>  }</div><div class="line"><a name="l04304"></a><span class="lineno"> 4304</span>  }</div><div class="line"><a name="l04305"></a><span class="lineno"> 4305</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"circuit: fully specified."</span>);</div><div class="line"><a name="l04306"></a><span class="lineno"> 4306</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l04307"></a><span class="lineno"> 4307</span>  }</div><div class="line"><a name="l04308"></a><span class="lineno"> 4308</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l04309"></a><span class="lineno"> 4309</span>  <span class="comment">// All self loop?</span></div><div class="line"><a name="l04310"></a><span class="lineno"> 4310</span>  <span class="keywordflow">if</span> (num_true == new_size) {</div><div class="line"><a name="l04311"></a><span class="lineno"> 4311</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"circuit: empty circuit."</span>);</div><div class="line"><a name="l04312"></a><span class="lineno"> 4312</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l04313"></a><span class="lineno"> 4313</span>  }</div><div class="line"><a name="l04314"></a><span class="lineno"> 4314</span>  }</div><div class="line"><a name="l04315"></a><span class="lineno"> 4315</span> </div><div class="line"><a name="l04316"></a><span class="lineno"> 4316</span>  <span class="comment">// Look for in/out-degree of two, this will imply that one of the indicator</span></div><div class="line"><a name="l04317"></a><span class="lineno"> 4317</span>  <span class="comment">// Boolean is equal to the negation of the other.</span></div><div class="line"><a name="l04318"></a><span class="lineno"> 4318</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num_nodes; ++i) {</div><div class="line"><a name="l04319"></a><span class="lineno"> 4319</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> std::vector<int>* arc_literals :</div><div class="line"><a name="l04320"></a><span class="lineno"> 4320</span>  {&incoming_arcs[i], &outgoing_arcs[i]}) {</div><div class="line"><a name="l04321"></a><span class="lineno"> 4321</span>  std::vector<int> literals;</div><div class="line"><a name="l04322"></a><span class="lineno"> 4322</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> ref : *arc_literals) {</div><div class="line"><a name="l04323"></a><span class="lineno"> 4323</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a9f3443b281c705edf1779f746637ad9b">LiteralIsFalse</a>(ref)) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l04324"></a><span class="lineno"> 4324</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a890f923209473cf55ac002d1b14bd9e2">LiteralIsTrue</a>(ref)) {</div><div class="line"><a name="l04325"></a><span class="lineno"> 4325</span>  literals.clear();</div><div class="line"><a name="l04326"></a><span class="lineno"> 4326</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l04327"></a><span class="lineno"> 4327</span>  }</div><div class="line"><a name="l04328"></a><span class="lineno"> 4328</span>  literals.push_back(ref);</div><div class="line"><a name="l04329"></a><span class="lineno"> 4329</span>  }</div><div class="line"><a name="l04330"></a><span class="lineno"> 4330</span>  <span class="keywordflow">if</span> (literals.size() == 2 && literals[0] != <a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(literals[1])) {</div><div class="line"><a name="l04331"></a><span class="lineno"> 4331</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"circuit: degree 2"</span>);</div><div class="line"><a name="l04332"></a><span class="lineno"> 4332</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a8fc1d49d1e1bf7261f15ccc6c23c4b10">StoreBooleanEqualityRelation</a>(literals[0],</div><div class="line"><a name="l04333"></a><span class="lineno"> 4333</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(literals[1]));</div><div class="line"><a name="l04334"></a><span class="lineno"> 4334</span>  }</div><div class="line"><a name="l04335"></a><span class="lineno"> 4335</span>  }</div><div class="line"><a name="l04336"></a><span class="lineno"> 4336</span>  }</div><div class="line"><a name="l04337"></a><span class="lineno"> 4337</span> </div><div class="line"><a name="l04338"></a><span class="lineno"> 4338</span>  <span class="comment">// Truncate the circuit and return.</span></div><div class="line"><a name="l04339"></a><span class="lineno"> 4339</span>  <span class="keywordflow">if</span> (new_size < num_arcs) {</div><div class="line"><a name="l04340"></a><span class="lineno"> 4340</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.mutable_tails()->Truncate(new_size);</div><div class="line"><a name="l04341"></a><span class="lineno"> 4341</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.mutable_heads()->Truncate(new_size);</div><div class="line"><a name="l04342"></a><span class="lineno"> 4342</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.mutable_literals()->Truncate(new_size);</div><div class="line"><a name="l04343"></a><span class="lineno"> 4343</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"circuit: removed false arcs."</span>);</div><div class="line"><a name="l04344"></a><span class="lineno"> 4344</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l04345"></a><span class="lineno"> 4345</span>  }</div><div class="line"><a name="l04346"></a><span class="lineno"> 4346</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l04347"></a><span class="lineno"> 4347</span> }</div><div class="line"><a name="l04348"></a><span class="lineno"> 4348</span> </div><div class="line"><a name="l04349"></a><span class="lineno"> 4349</span> <span class="keywordtype">bool</span> CpModelPresolver::PresolveAutomaton(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l04350"></a><span class="lineno"> 4350</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l04351"></a><span class="lineno"> 4351</span>  <span class="keywordflow">if</span> (<a class="code" href="namespaceoperations__research_1_1sat.html#a42a3b266d8c6dfab1c14baa6c04e2333">HasEnforcementLiteral</a>(*<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l04352"></a><span class="lineno"> 4352</span>  AutomatonConstraintProto& <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a> = *<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_automaton();</div><div class="line"><a name="l04353"></a><span class="lineno"> 4353</span>  <span class="keywordflow">if</span> (<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.vars_size() == 0 || <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.transition_label_size() == 0) {</div><div class="line"><a name="l04354"></a><span class="lineno"> 4354</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l04355"></a><span class="lineno"> 4355</span>  }</div><div class="line"><a name="l04356"></a><span class="lineno"> 4356</span> </div><div class="line"><a name="l04357"></a><span class="lineno"> 4357</span>  <span class="keywordtype">bool</span> all_have_same_affine_relation = <span class="keyword">true</span>;</div><div class="line"><a name="l04358"></a><span class="lineno"> 4358</span>  std::vector<AffineRelation::Relation> affine_relations;</div><div class="line"><a name="l04359"></a><span class="lineno"> 4359</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> v = 0; v < <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.vars_size(); ++v) {</div><div class="line"><a name="l04360"></a><span class="lineno"> 4360</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->automaton().vars(v);</div><div class="line"><a name="l04361"></a><span class="lineno"> 4361</span>  <span class="keyword">const</span> AffineRelation::Relation r = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aaddc5f58e8a40a5a308531949153f814">GetAffineRelation</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l04362"></a><span class="lineno"> 4362</span>  affine_relations.push_back(r);</div><div class="line"><a name="l04363"></a><span class="lineno"> 4363</span>  <span class="keywordflow">if</span> (r.representative == <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) {</div><div class="line"><a name="l04364"></a><span class="lineno"> 4364</span>  all_have_same_affine_relation = <span class="keyword">false</span>;</div><div class="line"><a name="l04365"></a><span class="lineno"> 4365</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l04366"></a><span class="lineno"> 4366</span>  }</div><div class="line"><a name="l04367"></a><span class="lineno"> 4367</span>  <span class="keywordflow">if</span> (v > 0 && (r.coeff != affine_relations[v - 1].coeff ||</div><div class="line"><a name="l04368"></a><span class="lineno"> 4368</span>  r.offset != affine_relations[v - 1].offset)) {</div><div class="line"><a name="l04369"></a><span class="lineno"> 4369</span>  all_have_same_affine_relation = <span class="keyword">false</span>;</div><div class="line"><a name="l04370"></a><span class="lineno"> 4370</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l04371"></a><span class="lineno"> 4371</span>  }</div><div class="line"><a name="l04372"></a><span class="lineno"> 4372</span>  }</div><div class="line"><a name="l04373"></a><span class="lineno"> 4373</span> </div><div class="line"><a name="l04374"></a><span class="lineno"> 4374</span>  <span class="keywordflow">if</span> (all_have_same_affine_relation) { <span class="comment">// Unscale labels.</span></div><div class="line"><a name="l04375"></a><span class="lineno"> 4375</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> v = 0; v < <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.vars_size(); ++v) {</div><div class="line"><a name="l04376"></a><span class="lineno"> 4376</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.set_vars(v, affine_relations[v].<a class="code" href="preprocessor_8cc.html#abcdbe46fb8451a69d42c17abdb920021">representative</a>);</div><div class="line"><a name="l04377"></a><span class="lineno"> 4377</span>  }</div><div class="line"><a name="l04378"></a><span class="lineno"> 4378</span>  <span class="keyword">const</span> AffineRelation::Relation rep = affine_relations.front();</div><div class="line"><a name="l04379"></a><span class="lineno"> 4379</span>  <span class="keywordtype">int</span> new_size = 0;</div><div class="line"><a name="l04380"></a><span class="lineno"> 4380</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> t = 0; t < <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.transition_tail_size(); ++t) {</div><div class="line"><a name="l04381"></a><span class="lineno"> 4381</span>  <span class="keyword">const</span> int64_t label = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.transition_label(t);</div><div class="line"><a name="l04382"></a><span class="lineno"> 4382</span>  int64_t inverse_label = (label - rep.offset) / rep.coeff;</div><div class="line"><a name="l04383"></a><span class="lineno"> 4383</span>  <a class="code" href="parser_8yy_8cc.html#a33e91cd0cef6786e9e3a27ac67707207">if</a> (inverse_label * rep.coeff + rep.offset == label) {</div><div class="line"><a name="l04384"></a><span class="lineno"> 4384</span>  <span class="keywordflow">if</span> (new_size != t) {</div><div class="line"><a name="l04385"></a><span class="lineno"> 4385</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.set_transition_tail(new_size, <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.transition_tail(t));</div><div class="line"><a name="l04386"></a><span class="lineno"> 4386</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.set_transition_head(new_size, <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.transition_head(t));</div><div class="line"><a name="l04387"></a><span class="lineno"> 4387</span>  }</div><div class="line"><a name="l04388"></a><span class="lineno"> 4388</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.set_transition_label(new_size, inverse_label);</div><div class="line"><a name="l04389"></a><span class="lineno"> 4389</span>  new_size++;</div><div class="line"><a name="l04390"></a><span class="lineno"> 4390</span>  }</div><div class="line"><a name="l04391"></a><span class="lineno"> 4391</span>  }</div><div class="line"><a name="l04392"></a><span class="lineno"> 4392</span>  <span class="keywordflow">if</span> (new_size < <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.transition_tail_size()) {</div><div class="line"><a name="l04393"></a><span class="lineno"> 4393</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.mutable_transition_tail()->Truncate(new_size);</div><div class="line"><a name="l04394"></a><span class="lineno"> 4394</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.mutable_transition_label()->Truncate(new_size);</div><div class="line"><a name="l04395"></a><span class="lineno"> 4395</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.mutable_transition_head()->Truncate(new_size);</div><div class="line"><a name="l04396"></a><span class="lineno"> 4396</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"automaton: remove invalid transitions"</span>);</div><div class="line"><a name="l04397"></a><span class="lineno"> 4397</span>  }</div><div class="line"><a name="l04398"></a><span class="lineno"> 4398</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"automaton: unscale all affine labels"</span>);</div><div class="line"><a name="l04399"></a><span class="lineno"> 4399</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l04400"></a><span class="lineno"> 4400</span>  }</div><div class="line"><a name="l04401"></a><span class="lineno"> 4401</span> </div><div class="line"><a name="l04402"></a><span class="lineno"> 4402</span>  Domain hull = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.vars(0));</div><div class="line"><a name="l04403"></a><span class="lineno"> 4403</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> v = 1; v < <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.vars_size(); ++v) {</div><div class="line"><a name="l04404"></a><span class="lineno"> 4404</span>  hull = hull.<a class="code" href="classoperations__research_1_1_domain.html#a5919f86aede74172b7fea05ebdb58975">UnionWith</a>(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.vars(v)));</div><div class="line"><a name="l04405"></a><span class="lineno"> 4405</span>  }</div><div class="line"><a name="l04406"></a><span class="lineno"> 4406</span> </div><div class="line"><a name="l04407"></a><span class="lineno"> 4407</span>  <span class="keywordtype">int</span> new_size = 0;</div><div class="line"><a name="l04408"></a><span class="lineno"> 4408</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> t = 0; t < <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.transition_tail_size(); ++t) {</div><div class="line"><a name="l04409"></a><span class="lineno"> 4409</span>  <span class="keyword">const</span> int64_t label = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.transition_label(t);</div><div class="line"><a name="l04410"></a><span class="lineno"> 4410</span>  <span class="keywordflow">if</span> (hull.Contains(label)) {</div><div class="line"><a name="l04411"></a><span class="lineno"> 4411</span>  <span class="keywordflow">if</span> (new_size != t) {</div><div class="line"><a name="l04412"></a><span class="lineno"> 4412</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.set_transition_tail(new_size, <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.transition_tail(t));</div><div class="line"><a name="l04413"></a><span class="lineno"> 4413</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.set_transition_label(new_size, label);</div><div class="line"><a name="l04414"></a><span class="lineno"> 4414</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.set_transition_head(new_size, <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.transition_head(t));</div><div class="line"><a name="l04415"></a><span class="lineno"> 4415</span>  }</div><div class="line"><a name="l04416"></a><span class="lineno"> 4416</span>  new_size++;</div><div class="line"><a name="l04417"></a><span class="lineno"> 4417</span>  }</div><div class="line"><a name="l04418"></a><span class="lineno"> 4418</span>  }</div><div class="line"><a name="l04419"></a><span class="lineno"> 4419</span>  <span class="keywordflow">if</span> (new_size < <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.transition_tail_size()) {</div><div class="line"><a name="l04420"></a><span class="lineno"> 4420</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.mutable_transition_tail()->Truncate(new_size);</div><div class="line"><a name="l04421"></a><span class="lineno"> 4421</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.mutable_transition_label()->Truncate(new_size);</div><div class="line"><a name="l04422"></a><span class="lineno"> 4422</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.mutable_transition_head()->Truncate(new_size);</div><div class="line"><a name="l04423"></a><span class="lineno"> 4423</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"automaton: remove invalid transitions"</span>);</div><div class="line"><a name="l04424"></a><span class="lineno"> 4424</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l04425"></a><span class="lineno"> 4425</span>  }</div><div class="line"><a name="l04426"></a><span class="lineno"> 4426</span> </div><div class="line"><a name="l04427"></a><span class="lineno"> 4427</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> n = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.vars_size();</div><div class="line"><a name="l04428"></a><span class="lineno"> 4428</span>  <span class="keyword">const</span> std::vector<int> vars = {<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.vars().begin(), <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.vars().end()};</div><div class="line"><a name="l04429"></a><span class="lineno"> 4429</span> </div><div class="line"><a name="l04430"></a><span class="lineno"> 4430</span>  <span class="comment">// Compute the set of reachable state at each time point.</span></div><div class="line"><a name="l04431"></a><span class="lineno"> 4431</span>  std::vector<std::set<int64_t>> reachable_states(n + 1);</div><div class="line"><a name="l04432"></a><span class="lineno"> 4432</span>  reachable_states[0].insert(<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.starting_state());</div><div class="line"><a name="l04433"></a><span class="lineno"> 4433</span>  reachable_states[n] = {<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.final_states().begin(),</div><div class="line"><a name="l04434"></a><span class="lineno"> 4434</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.final_states().end()};</div><div class="line"><a name="l04435"></a><span class="lineno"> 4435</span> </div><div class="line"><a name="l04436"></a><span class="lineno"> 4436</span>  <span class="comment">// Forward.</span></div><div class="line"><a name="l04437"></a><span class="lineno"> 4437</span>  <span class="comment">//</span></div><div class="line"><a name="l04438"></a><span class="lineno"> 4438</span>  <span class="comment">// TODO(user): filter using the domain of vars[time] that may not contain</span></div><div class="line"><a name="l04439"></a><span class="lineno"> 4439</span>  <span class="comment">// all the possible transitions.</span></div><div class="line"><a name="l04440"></a><span class="lineno"> 4440</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> <a class="code" href="resource_8cc.html#aee52de7b225665566aa47246b9d6b8fa">time</a> = 0; <a class="code" href="resource_8cc.html#aee52de7b225665566aa47246b9d6b8fa">time</a> + 1 < n; ++<a class="code" href="resource_8cc.html#aee52de7b225665566aa47246b9d6b8fa">time</a>) {</div><div class="line"><a name="l04441"></a><span class="lineno"> 4441</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> t = 0; t < <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.transition_tail_size(); ++t) {</div><div class="line"><a name="l04442"></a><span class="lineno"> 4442</span>  <span class="keyword">const</span> int64_t <a class="code" href="routing__flow_8cc.html#a64e7efc5529154ba56903e75f5300990">tail</a> = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.transition_tail(t);</div><div class="line"><a name="l04443"></a><span class="lineno"> 4443</span>  <span class="keyword">const</span> int64_t label = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.transition_label(t);</div><div class="line"><a name="l04444"></a><span class="lineno"> 4444</span>  <span class="keyword">const</span> int64_t <a class="code" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a> = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.transition_head(t);</div><div class="line"><a name="l04445"></a><span class="lineno"> 4445</span>  <span class="keywordflow">if</span> (!<a class="code" href="namespacegtl.html#aae28e97bd1fa93cb0032642550da7455">gtl::ContainsKey</a>(reachable_states[<a class="code" href="resource_8cc.html#aee52de7b225665566aa47246b9d6b8fa">time</a>], <a class="code" href="routing__flow_8cc.html#a64e7efc5529154ba56903e75f5300990">tail</a>)) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l04446"></a><span class="lineno"> 4446</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a9dd01897679ba54fca524a3b0b7d5612">DomainContains</a>(vars[<a class="code" href="resource_8cc.html#aee52de7b225665566aa47246b9d6b8fa">time</a>], label)) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l04447"></a><span class="lineno"> 4447</span>  reachable_states[<a class="code" href="resource_8cc.html#aee52de7b225665566aa47246b9d6b8fa">time</a> + 1].insert(<a class="code" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>);</div><div class="line"><a name="l04448"></a><span class="lineno"> 4448</span>  }</div><div class="line"><a name="l04449"></a><span class="lineno"> 4449</span>  }</div><div class="line"><a name="l04450"></a><span class="lineno"> 4450</span> </div><div class="line"><a name="l04451"></a><span class="lineno"> 4451</span>  std::vector<std::set<int64_t>> reached_values(n);</div><div class="line"><a name="l04452"></a><span class="lineno"> 4452</span> </div><div class="line"><a name="l04453"></a><span class="lineno"> 4453</span>  <span class="comment">// Backward.</span></div><div class="line"><a name="l04454"></a><span class="lineno"> 4454</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> <a class="code" href="resource_8cc.html#aee52de7b225665566aa47246b9d6b8fa">time</a> = n - 1; <a class="code" href="resource_8cc.html#aee52de7b225665566aa47246b9d6b8fa">time</a> >= 0; --<a class="code" href="resource_8cc.html#aee52de7b225665566aa47246b9d6b8fa">time</a>) {</div><div class="line"><a name="l04455"></a><span class="lineno"> 4455</span>  std::set<int64_t> new_set;</div><div class="line"><a name="l04456"></a><span class="lineno"> 4456</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> t = 0; t < <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.transition_tail_size(); ++t) {</div><div class="line"><a name="l04457"></a><span class="lineno"> 4457</span>  <span class="keyword">const</span> int64_t <a class="code" href="routing__flow_8cc.html#a64e7efc5529154ba56903e75f5300990">tail</a> = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.transition_tail(t);</div><div class="line"><a name="l04458"></a><span class="lineno"> 4458</span>  <span class="keyword">const</span> int64_t label = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.transition_label(t);</div><div class="line"><a name="l04459"></a><span class="lineno"> 4459</span>  <span class="keyword">const</span> int64_t <a class="code" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a> = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>.transition_head(t);</div><div class="line"><a name="l04460"></a><span class="lineno"> 4460</span> </div><div class="line"><a name="l04461"></a><span class="lineno"> 4461</span>  <span class="keywordflow">if</span> (!<a class="code" href="namespacegtl.html#aae28e97bd1fa93cb0032642550da7455">gtl::ContainsKey</a>(reachable_states[<a class="code" href="resource_8cc.html#aee52de7b225665566aa47246b9d6b8fa">time</a>], <a class="code" href="routing__flow_8cc.html#a64e7efc5529154ba56903e75f5300990">tail</a>)) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l04462"></a><span class="lineno"> 4462</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a9dd01897679ba54fca524a3b0b7d5612">DomainContains</a>(vars[<a class="code" href="resource_8cc.html#aee52de7b225665566aa47246b9d6b8fa">time</a>], label)) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l04463"></a><span class="lineno"> 4463</span>  <span class="keywordflow">if</span> (!<a class="code" href="namespacegtl.html#aae28e97bd1fa93cb0032642550da7455">gtl::ContainsKey</a>(reachable_states[<a class="code" href="resource_8cc.html#aee52de7b225665566aa47246b9d6b8fa">time</a> + 1], <a class="code" href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a>)) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l04464"></a><span class="lineno"> 4464</span>  new_set.insert(<a class="code" href="routing__flow_8cc.html#a64e7efc5529154ba56903e75f5300990">tail</a>);</div><div class="line"><a name="l04465"></a><span class="lineno"> 4465</span>  reached_values[<a class="code" href="resource_8cc.html#aee52de7b225665566aa47246b9d6b8fa">time</a>].insert(label);</div><div class="line"><a name="l04466"></a><span class="lineno"> 4466</span>  }</div><div class="line"><a name="l04467"></a><span class="lineno"> 4467</span>  reachable_states[<a class="code" href="resource_8cc.html#aee52de7b225665566aa47246b9d6b8fa">time</a>].swap(new_set);</div><div class="line"><a name="l04468"></a><span class="lineno"> 4468</span>  }</div><div class="line"><a name="l04469"></a><span class="lineno"> 4469</span> </div><div class="line"><a name="l04470"></a><span class="lineno"> 4470</span>  <span class="keywordtype">bool</span> removed_values = <span class="keyword">false</span>;</div><div class="line"><a name="l04471"></a><span class="lineno"> 4471</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> <a class="code" href="resource_8cc.html#aee52de7b225665566aa47246b9d6b8fa">time</a> = 0; <a class="code" href="resource_8cc.html#aee52de7b225665566aa47246b9d6b8fa">time</a> < n; ++<a class="code" href="resource_8cc.html#aee52de7b225665566aa47246b9d6b8fa">time</a>) {</div><div class="line"><a name="l04472"></a><span class="lineno"> 4472</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(</div><div class="line"><a name="l04473"></a><span class="lineno"> 4473</span>  vars[<a class="code" href="resource_8cc.html#aee52de7b225665566aa47246b9d6b8fa">time</a>],</div><div class="line"><a name="l04474"></a><span class="lineno"> 4474</span>  <a class="code" href="classoperations__research_1_1_domain.html#ac2d88de67793063ad5f5e923ffd1c0eb">Domain::FromValues</a>(</div><div class="line"><a name="l04475"></a><span class="lineno"> 4475</span>  {reached_values[time].begin(), reached_values[time].end()}),</div><div class="line"><a name="l04476"></a><span class="lineno"> 4476</span>  &removed_values)) {</div><div class="line"><a name="l04477"></a><span class="lineno"> 4477</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l04478"></a><span class="lineno"> 4478</span>  }</div><div class="line"><a name="l04479"></a><span class="lineno"> 4479</span>  }</div><div class="line"><a name="l04480"></a><span class="lineno"> 4480</span>  <span class="keywordflow">if</span> (removed_values) {</div><div class="line"><a name="l04481"></a><span class="lineno"> 4481</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"automaton: reduced variable domains"</span>);</div><div class="line"><a name="l04482"></a><span class="lineno"> 4482</span>  }</div><div class="line"><a name="l04483"></a><span class="lineno"> 4483</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l04484"></a><span class="lineno"> 4484</span> }</div><div class="line"><a name="l04485"></a><span class="lineno"> 4485</span> </div><div class="line"><a name="l04486"></a><span class="lineno"> 4486</span> <span class="keywordtype">bool</span> CpModelPresolver::PresolveReservoir(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l04487"></a><span class="lineno"> 4487</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l04488"></a><span class="lineno"> 4488</span>  <span class="keywordflow">if</span> (<a class="code" href="namespaceoperations__research_1_1sat.html#a42a3b266d8c6dfab1c14baa6c04e2333">HasEnforcementLiteral</a>(*<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l04489"></a><span class="lineno"> 4489</span> </div><div class="line"><a name="l04490"></a><span class="lineno"> 4490</span>  <span class="keywordtype">bool</span> changed = <span class="keyword">false</span>;</div><div class="line"><a name="l04491"></a><span class="lineno"> 4491</span> </div><div class="line"><a name="l04492"></a><span class="lineno"> 4492</span>  ReservoirConstraintProto& mutable_reservoir = *<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_reservoir();</div><div class="line"><a name="l04493"></a><span class="lineno"> 4493</span>  <span class="keywordflow">if</span> (mutable_reservoir.actives().empty()) {</div><div class="line"><a name="l04494"></a><span class="lineno"> 4494</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> true_literal = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ada5d036ab04018d9ee3ed60888843102">GetOrCreateConstantVar</a>(1);</div><div class="line"><a name="l04495"></a><span class="lineno"> 4495</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < mutable_reservoir.times_size(); ++i) {</div><div class="line"><a name="l04496"></a><span class="lineno"> 4496</span>  mutable_reservoir.add_actives(true_literal);</div><div class="line"><a name="l04497"></a><span class="lineno"> 4497</span>  }</div><div class="line"><a name="l04498"></a><span class="lineno"> 4498</span>  changed = <span class="keyword">true</span>;</div><div class="line"><a name="l04499"></a><span class="lineno"> 4499</span>  }</div><div class="line"><a name="l04500"></a><span class="lineno"> 4500</span> </div><div class="line"><a name="l04501"></a><span class="lineno"> 4501</span>  <span class="keyword">const</span> <span class="keyword">auto</span>& demand_is_null = [&](<span class="keywordtype">int</span> i) {</div><div class="line"><a name="l04502"></a><span class="lineno"> 4502</span>  <span class="keywordflow">return</span> mutable_reservoir.demands(i) == 0 ||</div><div class="line"><a name="l04503"></a><span class="lineno"> 4503</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a9f3443b281c705edf1779f746637ad9b">LiteralIsFalse</a>(mutable_reservoir.actives(i));</div><div class="line"><a name="l04504"></a><span class="lineno"> 4504</span>  };</div><div class="line"><a name="l04505"></a><span class="lineno"> 4505</span> </div><div class="line"><a name="l04506"></a><span class="lineno"> 4506</span>  <span class="comment">// Remove zero demands, and inactive events.</span></div><div class="line"><a name="l04507"></a><span class="lineno"> 4507</span>  <span class="keywordtype">int</span> num_zeros = 0;</div><div class="line"><a name="l04508"></a><span class="lineno"> 4508</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < mutable_reservoir.demands_size(); ++i) {</div><div class="line"><a name="l04509"></a><span class="lineno"> 4509</span>  <span class="keywordflow">if</span> (demand_is_null(i)) num_zeros++;</div><div class="line"><a name="l04510"></a><span class="lineno"> 4510</span>  }</div><div class="line"><a name="l04511"></a><span class="lineno"> 4511</span> </div><div class="line"><a name="l04512"></a><span class="lineno"> 4512</span>  <span class="keywordflow">if</span> (num_zeros > 0) { <span class="comment">// Remove null events</span></div><div class="line"><a name="l04513"></a><span class="lineno"> 4513</span>  changed = <span class="keyword">true</span>;</div><div class="line"><a name="l04514"></a><span class="lineno"> 4514</span>  <span class="keywordtype">int</span> new_size = 0;</div><div class="line"><a name="l04515"></a><span class="lineno"> 4515</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < mutable_reservoir.demands_size(); ++i) {</div><div class="line"><a name="l04516"></a><span class="lineno"> 4516</span>  <span class="keywordflow">if</span> (demand_is_null(i)) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l04517"></a><span class="lineno"> 4517</span>  mutable_reservoir.set_demands(new_size, mutable_reservoir.demands(i));</div><div class="line"><a name="l04518"></a><span class="lineno"> 4518</span>  mutable_reservoir.set_times(new_size, mutable_reservoir.times(i));</div><div class="line"><a name="l04519"></a><span class="lineno"> 4519</span>  mutable_reservoir.set_actives(new_size, mutable_reservoir.actives(i));</div><div class="line"><a name="l04520"></a><span class="lineno"> 4520</span>  new_size++;</div><div class="line"><a name="l04521"></a><span class="lineno"> 4521</span>  }</div><div class="line"><a name="l04522"></a><span class="lineno"> 4522</span> </div><div class="line"><a name="l04523"></a><span class="lineno"> 4523</span>  mutable_reservoir.mutable_demands()->Truncate(new_size);</div><div class="line"><a name="l04524"></a><span class="lineno"> 4524</span>  mutable_reservoir.mutable_times()->Truncate(new_size);</div><div class="line"><a name="l04525"></a><span class="lineno"> 4525</span>  mutable_reservoir.mutable_actives()->Truncate(new_size);</div><div class="line"><a name="l04526"></a><span class="lineno"> 4526</span> </div><div class="line"><a name="l04527"></a><span class="lineno"> 4527</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(</div><div class="line"><a name="l04528"></a><span class="lineno"> 4528</span>  <span class="stringliteral">"reservoir: remove zero demands or inactive events."</span>);</div><div class="line"><a name="l04529"></a><span class="lineno"> 4529</span>  }</div><div class="line"><a name="l04530"></a><span class="lineno"> 4530</span> </div><div class="line"><a name="l04531"></a><span class="lineno"> 4531</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> num_events = mutable_reservoir.demands_size();</div><div class="line"><a name="l04532"></a><span class="lineno"> 4532</span>  int64_t gcd = mutable_reservoir.demands().empty()</div><div class="line"><a name="l04533"></a><span class="lineno"> 4533</span>  ? 0</div><div class="line"><a name="l04534"></a><span class="lineno"> 4534</span>  : std::abs(mutable_reservoir.demands(0));</div><div class="line"><a name="l04535"></a><span class="lineno"> 4535</span>  <span class="keywordtype">int</span> num_positives = 0;</div><div class="line"><a name="l04536"></a><span class="lineno"> 4536</span>  <span class="keywordtype">int</span> num_negatives = 0;</div><div class="line"><a name="l04537"></a><span class="lineno"> 4537</span>  int64_t max_sum_of_positive_demands = 0;</div><div class="line"><a name="l04538"></a><span class="lineno"> 4538</span>  int64_t min_sum_of_negative_demands = 0;</div><div class="line"><a name="l04539"></a><span class="lineno"> 4539</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num_events; ++i) {</div><div class="line"><a name="l04540"></a><span class="lineno"> 4540</span>  <span class="keyword">const</span> int64_t <a class="code" href="resource_8cc.html#a29fb0dd9484d890b12b280c41c150e20">demand</a> = mutable_reservoir.demands(i);</div><div class="line"><a name="l04541"></a><span class="lineno"> 4541</span>  gcd = <a class="code" href="classoperations__research_1_1_math_util.html#ae94db7b2fa1d8e1b3c1dc6c683191609">MathUtil::GCD64</a>(gcd, std::abs(<a class="code" href="resource_8cc.html#a29fb0dd9484d890b12b280c41c150e20">demand</a>));</div><div class="line"><a name="l04542"></a><span class="lineno"> 4542</span>  <span class="keywordflow">if</span> (<a class="code" href="resource_8cc.html#a29fb0dd9484d890b12b280c41c150e20">demand</a> > 0) {</div><div class="line"><a name="l04543"></a><span class="lineno"> 4543</span>  num_positives++;</div><div class="line"><a name="l04544"></a><span class="lineno"> 4544</span>  max_sum_of_positive_demands += <a class="code" href="resource_8cc.html#a29fb0dd9484d890b12b280c41c150e20">demand</a>;</div><div class="line"><a name="l04545"></a><span class="lineno"> 4545</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l04546"></a><span class="lineno"> 4546</span>  <a class="code" href="base_2logging_8h.html#ab62f5ed8f2d48e29802be0cbbcd1359a">DCHECK_LT</a>(<a class="code" href="resource_8cc.html#a29fb0dd9484d890b12b280c41c150e20">demand</a>, 0);</div><div class="line"><a name="l04547"></a><span class="lineno"> 4547</span>  num_negatives++;</div><div class="line"><a name="l04548"></a><span class="lineno"> 4548</span>  min_sum_of_negative_demands += <a class="code" href="resource_8cc.html#a29fb0dd9484d890b12b280c41c150e20">demand</a>;</div><div class="line"><a name="l04549"></a><span class="lineno"> 4549</span>  }</div><div class="line"><a name="l04550"></a><span class="lineno"> 4550</span>  }</div><div class="line"><a name="l04551"></a><span class="lineno"> 4551</span> </div><div class="line"><a name="l04552"></a><span class="lineno"> 4552</span>  <span class="keywordflow">if</span> (min_sum_of_negative_demands >= mutable_reservoir.min_level() &&</div><div class="line"><a name="l04553"></a><span class="lineno"> 4553</span>  max_sum_of_positive_demands <= mutable_reservoir.max_level()) {</div><div class="line"><a name="l04554"></a><span class="lineno"> 4554</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"reservoir: always feasible"</span>);</div><div class="line"><a name="l04555"></a><span class="lineno"> 4555</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l04556"></a><span class="lineno"> 4556</span>  }</div><div class="line"><a name="l04557"></a><span class="lineno"> 4557</span> </div><div class="line"><a name="l04558"></a><span class="lineno"> 4558</span>  <span class="keywordflow">if</span> (min_sum_of_negative_demands > mutable_reservoir.max_level() ||</div><div class="line"><a name="l04559"></a><span class="lineno"> 4559</span>  max_sum_of_positive_demands < mutable_reservoir.min_level()) {</div><div class="line"><a name="l04560"></a><span class="lineno"> 4560</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"reservoir: trivially infeasible"</span>);</div><div class="line"><a name="l04561"></a><span class="lineno"> 4561</span>  <span class="keywordflow">return</span> context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5aa53538ba8adaa0bea1c3c0727425b0">NotifyThatModelIsUnsat</a>();</div><div class="line"><a name="l04562"></a><span class="lineno"> 4562</span>  }</div><div class="line"><a name="l04563"></a><span class="lineno"> 4563</span> </div><div class="line"><a name="l04564"></a><span class="lineno"> 4564</span>  <span class="keywordflow">if</span> (min_sum_of_negative_demands > mutable_reservoir.min_level()) {</div><div class="line"><a name="l04565"></a><span class="lineno"> 4565</span>  mutable_reservoir.set_min_level(min_sum_of_negative_demands);</div><div class="line"><a name="l04566"></a><span class="lineno"> 4566</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(</div><div class="line"><a name="l04567"></a><span class="lineno"> 4567</span>  <span class="stringliteral">"reservoir: increase min_level to reachable value"</span>);</div><div class="line"><a name="l04568"></a><span class="lineno"> 4568</span>  }</div><div class="line"><a name="l04569"></a><span class="lineno"> 4569</span> </div><div class="line"><a name="l04570"></a><span class="lineno"> 4570</span>  <span class="keywordflow">if</span> (max_sum_of_positive_demands < mutable_reservoir.max_level()) {</div><div class="line"><a name="l04571"></a><span class="lineno"> 4571</span>  mutable_reservoir.set_max_level(max_sum_of_positive_demands);</div><div class="line"><a name="l04572"></a><span class="lineno"> 4572</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"reservoir: reduce max_level to reachable value"</span>);</div><div class="line"><a name="l04573"></a><span class="lineno"> 4573</span>  }</div><div class="line"><a name="l04574"></a><span class="lineno"> 4574</span> </div><div class="line"><a name="l04575"></a><span class="lineno"> 4575</span>  <span class="keywordflow">if</span> (mutable_reservoir.min_level() <= 0 &&</div><div class="line"><a name="l04576"></a><span class="lineno"> 4576</span>  mutable_reservoir.max_level() >= 0 &&</div><div class="line"><a name="l04577"></a><span class="lineno"> 4577</span>  (num_positives == 0 || num_negatives == 0)) {</div><div class="line"><a name="l04578"></a><span class="lineno"> 4578</span>  <span class="comment">// If all demands have the same sign, and if the initial state is</span></div><div class="line"><a name="l04579"></a><span class="lineno"> 4579</span>  <span class="comment">// always feasible, we do not care about the order, just the sum.</span></div><div class="line"><a name="l04580"></a><span class="lineno"> 4580</span>  <span class="keyword">auto</span>* <span class="keyword">const</span> sum =</div><div class="line"><a name="l04581"></a><span class="lineno"> 4581</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>()-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ad653c55b371ae98444295965c6622ddb">mutable_linear</a>();</div><div class="line"><a name="l04582"></a><span class="lineno"> 4582</span>  int64_t fixed_contrib = 0;</div><div class="line"><a name="l04583"></a><span class="lineno"> 4583</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < mutable_reservoir.demands_size(); ++i) {</div><div class="line"><a name="l04584"></a><span class="lineno"> 4584</span>  <span class="keyword">const</span> int64_t <a class="code" href="resource_8cc.html#a29fb0dd9484d890b12b280c41c150e20">demand</a> = mutable_reservoir.demands(i);</div><div class="line"><a name="l04585"></a><span class="lineno"> 4585</span>  <a class="code" href="base_2logging_8h.html#a46e69120fbd3b36e6960e096d23b66f0">DCHECK_NE</a>(<a class="code" href="resource_8cc.html#a29fb0dd9484d890b12b280c41c150e20">demand</a>, 0);</div><div class="line"><a name="l04586"></a><span class="lineno"> 4586</span> </div><div class="line"><a name="l04587"></a><span class="lineno"> 4587</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> active = mutable_reservoir.actives(i);</div><div class="line"><a name="l04588"></a><span class="lineno"> 4588</span>  <span class="keywordflow">if</span> (<a class="code" href="namespaceoperations__research_1_1sat.html#a217338425de4389014563f1f24331713">RefIsPositive</a>(active)) {</div><div class="line"><a name="l04589"></a><span class="lineno"> 4589</span>  sum->add_vars(active);</div><div class="line"><a name="l04590"></a><span class="lineno"> 4590</span>  sum->add_coeffs(<a class="code" href="resource_8cc.html#a29fb0dd9484d890b12b280c41c150e20">demand</a>);</div><div class="line"><a name="l04591"></a><span class="lineno"> 4591</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l04592"></a><span class="lineno"> 4592</span>  sum->add_vars(<a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(active));</div><div class="line"><a name="l04593"></a><span class="lineno"> 4593</span>  sum->add_coeffs(-<a class="code" href="resource_8cc.html#a29fb0dd9484d890b12b280c41c150e20">demand</a>);</div><div class="line"><a name="l04594"></a><span class="lineno"> 4594</span>  fixed_contrib += <a class="code" href="resource_8cc.html#a29fb0dd9484d890b12b280c41c150e20">demand</a>;</div><div class="line"><a name="l04595"></a><span class="lineno"> 4595</span>  }</div><div class="line"><a name="l04596"></a><span class="lineno"> 4596</span>  }</div><div class="line"><a name="l04597"></a><span class="lineno"> 4597</span>  sum->add_domain(mutable_reservoir.min_level() - fixed_contrib);</div><div class="line"><a name="l04598"></a><span class="lineno"> 4598</span>  sum->add_domain(mutable_reservoir.max_level() - fixed_contrib);</div><div class="line"><a name="l04599"></a><span class="lineno"> 4599</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"reservoir: converted to linear"</span>);</div><div class="line"><a name="l04600"></a><span class="lineno"> 4600</span>  <span class="keywordflow">return</span> RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l04601"></a><span class="lineno"> 4601</span>  }</div><div class="line"><a name="l04602"></a><span class="lineno"> 4602</span> </div><div class="line"><a name="l04603"></a><span class="lineno"> 4603</span>  <span class="keywordflow">if</span> (gcd > 1) {</div><div class="line"><a name="l04604"></a><span class="lineno"> 4604</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < mutable_reservoir.demands_size(); ++i) {</div><div class="line"><a name="l04605"></a><span class="lineno"> 4605</span>  mutable_reservoir.set_demands(i, mutable_reservoir.demands(i) / gcd);</div><div class="line"><a name="l04606"></a><span class="lineno"> 4606</span>  }</div><div class="line"><a name="l04607"></a><span class="lineno"> 4607</span> </div><div class="line"><a name="l04608"></a><span class="lineno"> 4608</span>  <span class="comment">// Adjust min and max levels.</span></div><div class="line"><a name="l04609"></a><span class="lineno"> 4609</span>  <span class="comment">// max level is always rounded down.</span></div><div class="line"><a name="l04610"></a><span class="lineno"> 4610</span>  <span class="comment">// min level is always rounded up.</span></div><div class="line"><a name="l04611"></a><span class="lineno"> 4611</span>  <span class="keyword">const</span> Domain reduced_domain =</div><div class="line"><a name="l04612"></a><span class="lineno"> 4612</span>  Domain({mutable_reservoir.min_level(), mutable_reservoir.max_level()})</div><div class="line"><a name="l04613"></a><span class="lineno"> 4613</span>  .InverseMultiplicationBy(gcd);</div><div class="line"><a name="l04614"></a><span class="lineno"> 4614</span>  mutable_reservoir.set_min_level(reduced_domain.Min());</div><div class="line"><a name="l04615"></a><span class="lineno"> 4615</span>  mutable_reservoir.set_max_level(reduced_domain.Max());</div><div class="line"><a name="l04616"></a><span class="lineno"> 4616</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"reservoir: simplify demands and levels by gcd."</span>);</div><div class="line"><a name="l04617"></a><span class="lineno"> 4617</span>  }</div><div class="line"><a name="l04618"></a><span class="lineno"> 4618</span> </div><div class="line"><a name="l04619"></a><span class="lineno"> 4619</span>  <span class="keywordflow">if</span> (num_positives == 1 && num_negatives > 0) {</div><div class="line"><a name="l04620"></a><span class="lineno"> 4620</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(</div><div class="line"><a name="l04621"></a><span class="lineno"> 4621</span>  <span class="stringliteral">"TODO reservoir: one producer, multiple consumers."</span>);</div><div class="line"><a name="l04622"></a><span class="lineno"> 4622</span>  }</div><div class="line"><a name="l04623"></a><span class="lineno"> 4623</span> </div><div class="line"><a name="l04624"></a><span class="lineno"> 4624</span>  absl::flat_hash_set<std::pair<int, int>> time_active_set;</div><div class="line"><a name="l04625"></a><span class="lineno"> 4625</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < mutable_reservoir.demands_size(); ++i) {</div><div class="line"><a name="l04626"></a><span class="lineno"> 4626</span>  <span class="keyword">const</span> std::pair<int, int> key = std::make_pair(</div><div class="line"><a name="l04627"></a><span class="lineno"> 4627</span>  mutable_reservoir.times(i), mutable_reservoir.actives(i));</div><div class="line"><a name="l04628"></a><span class="lineno"> 4628</span>  <span class="keywordflow">if</span> (time_active_set.contains(key)) {</div><div class="line"><a name="l04629"></a><span class="lineno"> 4629</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"TODO reservoir: merge synchronized events."</span>);</div><div class="line"><a name="l04630"></a><span class="lineno"> 4630</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l04631"></a><span class="lineno"> 4631</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l04632"></a><span class="lineno"> 4632</span>  time_active_set.insert(key);</div><div class="line"><a name="l04633"></a><span class="lineno"> 4633</span>  }</div><div class="line"><a name="l04634"></a><span class="lineno"> 4634</span>  }</div><div class="line"><a name="l04635"></a><span class="lineno"> 4635</span> </div><div class="line"><a name="l04636"></a><span class="lineno"> 4636</span>  <span class="keywordflow">return</span> changed;</div><div class="line"><a name="l04637"></a><span class="lineno"> 4637</span> }</div><div class="line"><a name="l04638"></a><span class="lineno"> 4638</span> </div><div class="line"><a name="l04639"></a><span class="lineno"> 4639</span> <span class="comment">// TODO(user): It is probably more efficient to keep all the bool_and in a</span></div><div class="line"><a name="l04640"></a><span class="lineno"> 4640</span> <span class="comment">// global place during all the presolve, and just output them at the end</span></div><div class="line"><a name="l04641"></a><span class="lineno"> 4641</span> <span class="comment">// rather than modifying more than once the proto.</span></div><div class="line"><a name="l04642"></a><span class="lineno"> 4642</span> <span class="keywordtype">void</span> CpModelPresolver::ExtractBoolAnd() {</div><div class="line"><a name="l04643"></a><span class="lineno"> 4643</span>  absl::flat_hash_map<int, int> ref_to_bool_and;</div><div class="line"><a name="l04644"></a><span class="lineno"> 4644</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> num_constraints = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#aeaf0da781ca9b370d96b7fbd3f74266a">constraints_size</a>();</div><div class="line"><a name="l04645"></a><span class="lineno"> 4645</span>  std::vector<int> to_remove;</div><div class="line"><a name="l04646"></a><span class="lineno"> 4646</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> c = 0; c < num_constraints; ++c) {</div><div class="line"><a name="l04647"></a><span class="lineno"> 4647</span>  <span class="keyword">const</span> ConstraintProto& <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a> = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#afce66afa8ae7776a449bba7313ea3559">constraints</a>(c);</div><div class="line"><a name="l04648"></a><span class="lineno"> 4648</span>  <span class="keywordflow">if</span> (<a class="code" href="namespaceoperations__research_1_1sat.html#a42a3b266d8c6dfab1c14baa6c04e2333">HasEnforcementLiteral</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l04649"></a><span class="lineno"> 4649</span> </div><div class="line"><a name="l04650"></a><span class="lineno"> 4650</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.constraint_case() == ConstraintProto::ConstraintCase::kBoolOr &&</div><div class="line"><a name="l04651"></a><span class="lineno"> 4651</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.bool_or().literals().size() == 2) {</div><div class="line"><a name="l04652"></a><span class="lineno"> 4652</span>  AddImplication(<a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.bool_or().literals(0)),</div><div class="line"><a name="l04653"></a><span class="lineno"> 4653</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.bool_or().literals(1), context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>,</div><div class="line"><a name="l04654"></a><span class="lineno"> 4654</span>  &ref_to_bool_and);</div><div class="line"><a name="l04655"></a><span class="lineno"> 4655</span>  to_remove.push_back(c);</div><div class="line"><a name="l04656"></a><span class="lineno"> 4656</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l04657"></a><span class="lineno"> 4657</span>  }</div><div class="line"><a name="l04658"></a><span class="lineno"> 4658</span> </div><div class="line"><a name="l04659"></a><span class="lineno"> 4659</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.constraint_case() == ConstraintProto::ConstraintCase::kAtMostOne &&</div><div class="line"><a name="l04660"></a><span class="lineno"> 4660</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.at_most_one().literals().size() == 2) {</div><div class="line"><a name="l04661"></a><span class="lineno"> 4661</span>  AddImplication(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.at_most_one().literals(0),</div><div class="line"><a name="l04662"></a><span class="lineno"> 4662</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.at_most_one().literals(1)),</div><div class="line"><a name="l04663"></a><span class="lineno"> 4663</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>, &ref_to_bool_and);</div><div class="line"><a name="l04664"></a><span class="lineno"> 4664</span>  to_remove.push_back(c);</div><div class="line"><a name="l04665"></a><span class="lineno"> 4665</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l04666"></a><span class="lineno"> 4666</span>  }</div><div class="line"><a name="l04667"></a><span class="lineno"> 4667</span>  }</div><div class="line"><a name="l04668"></a><span class="lineno"> 4668</span> </div><div class="line"><a name="l04669"></a><span class="lineno"> 4669</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l04670"></a><span class="lineno"> 4670</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> c : to_remove) {</div><div class="line"><a name="l04671"></a><span class="lineno"> 4671</span>  ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a> = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a9b3e1bc8b76ea7d2614fd7ec2b066039">mutable_constraints</a>(c);</div><div class="line"><a name="l04672"></a><span class="lineno"> 4672</span>  <a class="code" href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a>(RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>));</div><div class="line"><a name="l04673"></a><span class="lineno"> 4673</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab75a27c0aeda2de9c3957719b8196c36">UpdateConstraintVariableUsage</a>(c);</div><div class="line"><a name="l04674"></a><span class="lineno"> 4674</span>  }</div><div class="line"><a name="l04675"></a><span class="lineno"> 4675</span> }</div><div class="line"><a name="l04676"></a><span class="lineno"> 4676</span> </div><div class="line"><a name="l04677"></a><span class="lineno"> 4677</span> <span class="keywordtype">void</span> CpModelPresolver::Probe() {</div><div class="line"><a name="l04678"></a><span class="lineno"> 4678</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span>;</div><div class="line"><a name="l04679"></a><span class="lineno"> 4679</span> </div><div class="line"><a name="l04680"></a><span class="lineno"> 4680</span>  <span class="comment">// Update the domain in the current CpModelProto.</span></div><div class="line"><a name="l04681"></a><span class="lineno"> 4681</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#abef5f55c3278c137faca92b8e433f8ea">variables_size</a>(); ++i) {</div><div class="line"><a name="l04682"></a><span class="lineno"> 4682</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a901c19b12842f8af153e588a689a90b5">FillDomainInProto</a>(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(i),</div><div class="line"><a name="l04683"></a><span class="lineno"> 4683</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ab9746c6070379e1990d2fd2da7586398">mutable_variables</a>(i));</div><div class="line"><a name="l04684"></a><span class="lineno"> 4684</span>  }</div><div class="line"><a name="l04685"></a><span class="lineno"> 4685</span>  <span class="keyword">const</span> CpModelProto& <a class="code" href="cp__model__solver_8cc.html#a6ac76d8a372013f67c4973012948ec84">model_proto</a> = *(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>);</div><div class="line"><a name="l04686"></a><span class="lineno"> 4686</span> </div><div class="line"><a name="l04687"></a><span class="lineno"> 4687</span>  <span class="comment">// Load the constraints in a local model.</span></div><div class="line"><a name="l04688"></a><span class="lineno"> 4688</span>  <span class="comment">//</span></div><div class="line"><a name="l04689"></a><span class="lineno"> 4689</span>  <span class="comment">// TODO(user): The model we load does not contain affine relations! But</span></div><div class="line"><a name="l04690"></a><span class="lineno"> 4690</span>  <span class="comment">// ideally we should be able to remove all of them once we allow more complex</span></div><div class="line"><a name="l04691"></a><span class="lineno"> 4691</span>  <span class="comment">// constraints to contains linear expression.</span></div><div class="line"><a name="l04692"></a><span class="lineno"> 4692</span>  <span class="comment">//</span></div><div class="line"><a name="l04693"></a><span class="lineno"> 4693</span>  <span class="comment">// TODO(user): remove code duplication with cp_model_solver. Here we also do</span></div><div class="line"><a name="l04694"></a><span class="lineno"> 4694</span>  <span class="comment">// not run the heuristic to decide which variable to fully encode.</span></div><div class="line"><a name="l04695"></a><span class="lineno"> 4695</span>  <span class="comment">//</span></div><div class="line"><a name="l04696"></a><span class="lineno"> 4696</span>  <span class="comment">// TODO(user): Maybe do not load slow to propagate constraints? for instance</span></div><div class="line"><a name="l04697"></a><span class="lineno"> 4697</span>  <span class="comment">// we do not use any linear relaxation here.</span></div><div class="line"><a name="l04698"></a><span class="lineno"> 4698</span>  Model <a class="code" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>;</div><div class="line"><a name="l04699"></a><span class="lineno"> 4699</span>  <a class="code" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>.Register<SolverLogger>(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a3269ba23127e4ee02e1ab7eecccb620f">logger</a>());</div><div class="line"><a name="l04700"></a><span class="lineno"> 4700</span> </div><div class="line"><a name="l04701"></a><span class="lineno"> 4701</span>  <span class="comment">// Adapt some of the parameters during this probing phase.</span></div><div class="line"><a name="l04702"></a><span class="lineno"> 4702</span>  <span class="keyword">auto</span>* local_param = <a class="code" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>.GetOrCreate<SatParameters>();</div><div class="line"><a name="l04703"></a><span class="lineno"> 4703</span>  *local_param = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aaabb604ccac4a6136be93bfe64e2290d">params</a>();</div><div class="line"><a name="l04704"></a><span class="lineno"> 4704</span>  local_param-><a class="code" href="classoperations__research_1_1sat_1_1_sat_parameters.html#aa2cafb3609f95997ccebf03f0d5cbf51">set_use_implied_bounds</a>(<span class="keyword">false</span>);</div><div class="line"><a name="l04705"></a><span class="lineno"> 4705</span> </div><div class="line"><a name="l04706"></a><span class="lineno"> 4706</span>  <a class="code" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>.GetOrCreate<TimeLimit>()->MergeWithGlobalTimeLimit(</div><div class="line"><a name="l04707"></a><span class="lineno"> 4707</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a0704cc50211ab739309aa9f54aa8c606">time_limit</a>());</div><div class="line"><a name="l04708"></a><span class="lineno"> 4708</span>  <a class="code" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>.Register<ModelRandomGenerator>(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ad02c7812cfbc2a8c4c05d955c9681259">random</a>());</div><div class="line"><a name="l04709"></a><span class="lineno"> 4709</span>  <span class="keyword">auto</span>* encoder = <a class="code" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>.GetOrCreate<IntegerEncoder>();</div><div class="line"><a name="l04710"></a><span class="lineno"> 4710</span>  encoder->DisableImplicationBetweenLiteral();</div><div class="line"><a name="l04711"></a><span class="lineno"> 4711</span>  <span class="keyword">auto</span>* mapping = <a class="code" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>.GetOrCreate<CpModelMapping>();</div><div class="line"><a name="l04712"></a><span class="lineno"> 4712</span> </div><div class="line"><a name="l04713"></a><span class="lineno"> 4713</span>  <span class="comment">// Important: Because the model_proto do not contains affine relation or the</span></div><div class="line"><a name="l04714"></a><span class="lineno"> 4714</span>  <span class="comment">// objective, we cannot call DetectOptionalVariables() ! This might wrongly</span></div><div class="line"><a name="l04715"></a><span class="lineno"> 4715</span>  <span class="comment">// detect optionality and derive bad conclusion.</span></div><div class="line"><a name="l04716"></a><span class="lineno"> 4716</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a1a6eefe7a5bfd8bdf83407c9e6af56f5">LoadVariables</a>(<a class="code" href="cp__model__solver_8cc.html#a6ac76d8a372013f67c4973012948ec84">model_proto</a>, <span class="comment">/*view_all_booleans_as_integers=*/</span><span class="keyword">false</span>, &<a class="code" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>);</div><div class="line"><a name="l04717"></a><span class="lineno"> 4717</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#ad78bf6fcea4b54f750e2457e47b4f46a">ExtractEncoding</a>(<a class="code" href="cp__model__solver_8cc.html#a6ac76d8a372013f67c4973012948ec84">model_proto</a>, &<a class="code" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>);</div><div class="line"><a name="l04718"></a><span class="lineno"> 4718</span>  <span class="keyword">auto</span>* sat_solver = <a class="code" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>.GetOrCreate<SatSolver>();</div><div class="line"><a name="l04719"></a><span class="lineno"> 4719</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> ConstraintProto& <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a> : <a class="code" href="cp__model__solver_8cc.html#a6ac76d8a372013f67c4973012948ec84">model_proto</a>.constraints()) {</div><div class="line"><a name="l04720"></a><span class="lineno"> 4720</span>  <span class="keywordflow">if</span> (mapping->ConstraintIsAlreadyLoaded(&<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l04721"></a><span class="lineno"> 4721</span>  <a class="code" href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a>(<a class="code" href="namespaceoperations__research_1_1sat.html#a1c3fa75911c74ce485e62814484c7ae7">LoadConstraint</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>, &<a class="code" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>));</div><div class="line"><a name="l04722"></a><span class="lineno"> 4722</span>  <span class="keywordflow">if</span> (sat_solver->IsModelUnsat()) {</div><div class="line"><a name="l04723"></a><span class="lineno"> 4723</span>  <span class="keywordflow">return</span> (<span class="keywordtype">void</span>)context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5aa53538ba8adaa0bea1c3c0727425b0">NotifyThatModelIsUnsat</a>(absl::StrCat(</div><div class="line"><a name="l04724"></a><span class="lineno"> 4724</span>  <span class="stringliteral">"after loading constraint during probing "</span>, <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.ShortDebugString()));</div><div class="line"><a name="l04725"></a><span class="lineno"> 4725</span>  }</div><div class="line"><a name="l04726"></a><span class="lineno"> 4726</span>  }</div><div class="line"><a name="l04727"></a><span class="lineno"> 4727</span>  encoder->AddAllImplicationsBetweenAssociatedLiterals();</div><div class="line"><a name="l04728"></a><span class="lineno"> 4728</span>  <span class="keywordflow">if</span> (!sat_solver->Propagate()) {</div><div class="line"><a name="l04729"></a><span class="lineno"> 4729</span>  <span class="keywordflow">return</span> (<span class="keywordtype">void</span>)context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5aa53538ba8adaa0bea1c3c0727425b0">NotifyThatModelIsUnsat</a>(</div><div class="line"><a name="l04730"></a><span class="lineno"> 4730</span>  <span class="stringliteral">"during probing initial propagation"</span>);</div><div class="line"><a name="l04731"></a><span class="lineno"> 4731</span>  }</div><div class="line"><a name="l04732"></a><span class="lineno"> 4732</span> </div><div class="line"><a name="l04733"></a><span class="lineno"> 4733</span>  <span class="comment">// Probe.</span></div><div class="line"><a name="l04734"></a><span class="lineno"> 4734</span>  <span class="comment">//</span></div><div class="line"><a name="l04735"></a><span class="lineno"> 4735</span>  <span class="comment">// TODO(user): Compute the transitive reduction instead of just the</span></div><div class="line"><a name="l04736"></a><span class="lineno"> 4736</span>  <span class="comment">// equivalences, and use the newly learned binary clauses?</span></div><div class="line"><a name="l04737"></a><span class="lineno"> 4737</span>  <span class="keyword">auto</span>* implication_graph = <a class="code" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>.GetOrCreate<BinaryImplicationGraph>();</div><div class="line"><a name="l04738"></a><span class="lineno"> 4738</span>  <span class="keyword">auto</span>* prober = <a class="code" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>.GetOrCreate<Prober>();</div><div class="line"><a name="l04739"></a><span class="lineno"> 4739</span>  prober->ProbeBooleanVariables(<span class="comment">/*deterministic_time_limit=*/</span>1.0);</div><div class="line"><a name="l04740"></a><span class="lineno"> 4740</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a0704cc50211ab739309aa9f54aa8c606">time_limit</a>()-><a class="code" href="classoperations__research_1_1_time_limit.html#af90cfd1fc238433fc303ee28c5914eb9">AdvanceDeterministicTime</a>(</div><div class="line"><a name="l04741"></a><span class="lineno"> 4741</span>  <a class="code" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>.GetOrCreate<TimeLimit>()->GetElapsedDeterministicTime());</div><div class="line"><a name="l04742"></a><span class="lineno"> 4742</span>  <span class="keywordflow">if</span> (sat_solver->IsModelUnsat() || !implication_graph->DetectEquivalences()) {</div><div class="line"><a name="l04743"></a><span class="lineno"> 4743</span>  <span class="keywordflow">return</span> (<span class="keywordtype">void</span>)context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5aa53538ba8adaa0bea1c3c0727425b0">NotifyThatModelIsUnsat</a>(<span class="stringliteral">"during probing"</span>);</div><div class="line"><a name="l04744"></a><span class="lineno"> 4744</span>  }</div><div class="line"><a name="l04745"></a><span class="lineno"> 4745</span> </div><div class="line"><a name="l04746"></a><span class="lineno"> 4746</span>  <span class="comment">// Update the presolve context with fixed Boolean variables.</span></div><div class="line"><a name="l04747"></a><span class="lineno"> 4747</span>  <a class="code" href="base_2logging_8h.html#a7c0ce053b28d53aa4eaf3eb7fb71663b">CHECK_EQ</a>(sat_solver->CurrentDecisionLevel(), 0);</div><div class="line"><a name="l04748"></a><span class="lineno"> 4748</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < sat_solver->LiteralTrail().Index(); ++i) {</div><div class="line"><a name="l04749"></a><span class="lineno"> 4749</span>  <span class="keyword">const</span> Literal l = sat_solver->LiteralTrail()[i];</div><div class="line"><a name="l04750"></a><span class="lineno"> 4750</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = mapping->GetProtoVariableFromBooleanVariable(l.Variable());</div><div class="line"><a name="l04751"></a><span class="lineno"> 4751</span>  <span class="keywordflow">if</span> (<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> >= 0) {</div><div class="line"><a name="l04752"></a><span class="lineno"> 4752</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> ref = l.IsPositive() ? <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> : <a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l04753"></a><span class="lineno"> 4753</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a37ed950834f3f3b427a707631fd745f4">SetLiteralToTrue</a>(ref)) <span class="keywordflow">return</span>;</div><div class="line"><a name="l04754"></a><span class="lineno"> 4754</span>  }</div><div class="line"><a name="l04755"></a><span class="lineno"> 4755</span>  }</div><div class="line"><a name="l04756"></a><span class="lineno"> 4756</span> </div><div class="line"><a name="l04757"></a><span class="lineno"> 4757</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> num_variables = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a6a4544ca20489d70e302f5d6d374a012">variables</a>().size();</div><div class="line"><a name="l04758"></a><span class="lineno"> 4758</span>  <span class="keyword">auto</span>* integer_trail = <a class="code" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>.GetOrCreate<IntegerTrail>();</div><div class="line"><a name="l04759"></a><span class="lineno"> 4759</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = 0; <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> < num_variables; ++<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) {</div><div class="line"><a name="l04760"></a><span class="lineno"> 4760</span>  <span class="comment">// Restrict IntegerVariable domain.</span></div><div class="line"><a name="l04761"></a><span class="lineno"> 4761</span>  <span class="comment">// Note that Boolean are already dealt with above.</span></div><div class="line"><a name="l04762"></a><span class="lineno"> 4762</span>  <span class="keywordflow">if</span> (!mapping->IsBoolean(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) {</div><div class="line"><a name="l04763"></a><span class="lineno"> 4763</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(</div><div class="line"><a name="l04764"></a><span class="lineno"> 4764</span>  <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>,</div><div class="line"><a name="l04765"></a><span class="lineno"> 4765</span>  integer_trail->InitialVariableDomain(mapping->Integer(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)))) {</div><div class="line"><a name="l04766"></a><span class="lineno"> 4766</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l04767"></a><span class="lineno"> 4767</span>  }</div><div class="line"><a name="l04768"></a><span class="lineno"> 4768</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l04769"></a><span class="lineno"> 4769</span>  }</div><div class="line"><a name="l04770"></a><span class="lineno"> 4770</span> </div><div class="line"><a name="l04771"></a><span class="lineno"> 4771</span>  <span class="comment">// Add Boolean equivalence relations.</span></div><div class="line"><a name="l04772"></a><span class="lineno"> 4772</span>  <span class="keyword">const</span> Literal l = mapping->Literal(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l04773"></a><span class="lineno"> 4773</span>  <span class="keyword">const</span> Literal r = implication_graph->RepresentativeOf(l);</div><div class="line"><a name="l04774"></a><span class="lineno"> 4774</span>  <span class="keywordflow">if</span> (r != l) {</div><div class="line"><a name="l04775"></a><span class="lineno"> 4775</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> r_var =</div><div class="line"><a name="l04776"></a><span class="lineno"> 4776</span>  mapping->GetProtoVariableFromBooleanVariable(r.Variable());</div><div class="line"><a name="l04777"></a><span class="lineno"> 4777</span>  <a class="code" href="base_2logging_8h.html#a7cc25402ecd7591b4c39934dd656b1f9">CHECK_GE</a>(r_var, 0);</div><div class="line"><a name="l04778"></a><span class="lineno"> 4778</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a8fc1d49d1e1bf7261f15ccc6c23c4b10">StoreBooleanEqualityRelation</a>(</div><div class="line"><a name="l04779"></a><span class="lineno"> 4779</span>  <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>, r.IsPositive() ? r_var : <a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(r_var));</div><div class="line"><a name="l04780"></a><span class="lineno"> 4780</span>  }</div><div class="line"><a name="l04781"></a><span class="lineno"> 4781</span>  }</div><div class="line"><a name="l04782"></a><span class="lineno"> 4782</span> }</div><div class="line"><a name="l04783"></a><span class="lineno"> 4783</span> </div><div class="line"><a name="l04784"></a><span class="lineno"> 4784</span> <span class="comment">// TODO(user): What to do with the at_most_one/exactly_one constraints?</span></div><div class="line"><a name="l04785"></a><span class="lineno"> 4785</span> <span class="comment">// currently we do not take them into account here.</span></div><div class="line"><a name="l04786"></a><span class="lineno"> 4786</span> <span class="keywordtype">void</span> CpModelPresolver::PresolvePureSatPart() {</div><div class="line"><a name="l04787"></a><span class="lineno"> 4787</span>  <span class="comment">// TODO(user): Reenable some SAT presolve with</span></div><div class="line"><a name="l04788"></a><span class="lineno"> 4788</span>  <span class="comment">// keep_all_feasible_solutions set to true.</span></div><div class="line"><a name="l04789"></a><span class="lineno"> 4789</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>() || context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab7b13b808e3dea6fc1e4006f7134e9f9">keep_all_feasible_solutions</a>) <span class="keywordflow">return</span>;</div><div class="line"><a name="l04790"></a><span class="lineno"> 4790</span> </div><div class="line"><a name="l04791"></a><span class="lineno"> 4791</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> num_variables = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#abef5f55c3278c137faca92b8e433f8ea">variables_size</a>();</div><div class="line"><a name="l04792"></a><span class="lineno"> 4792</span>  SatPostsolver sat_postsolver(num_variables);</div><div class="line"><a name="l04793"></a><span class="lineno"> 4793</span>  SatPresolver sat_presolver(&sat_postsolver, logger_);</div><div class="line"><a name="l04794"></a><span class="lineno"> 4794</span>  sat_presolver.SetNumVariables(num_variables);</div><div class="line"><a name="l04795"></a><span class="lineno"> 4795</span>  sat_presolver.SetTimeLimit(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a0704cc50211ab739309aa9f54aa8c606">time_limit</a>());</div><div class="line"><a name="l04796"></a><span class="lineno"> 4796</span> </div><div class="line"><a name="l04797"></a><span class="lineno"> 4797</span>  SatParameters params = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aaabb604ccac4a6136be93bfe64e2290d">params</a>();</div><div class="line"><a name="l04798"></a><span class="lineno"> 4798</span> </div><div class="line"><a name="l04799"></a><span class="lineno"> 4799</span>  <span class="comment">// The "full solver" postsolve does not support changing the value of a</span></div><div class="line"><a name="l04800"></a><span class="lineno"> 4800</span>  <span class="comment">// variable from the solution of the presolved problem, and we do need this</span></div><div class="line"><a name="l04801"></a><span class="lineno"> 4801</span>  <span class="comment">// for blocked clause. It should be possible to allow for this by adding extra</span></div><div class="line"><a name="l04802"></a><span class="lineno"> 4802</span>  <span class="comment">// variable to the mapping model at presolve and some linking constraints, but</span></div><div class="line"><a name="l04803"></a><span class="lineno"> 4803</span>  <span class="comment">// this is messy.</span></div><div class="line"><a name="l04804"></a><span class="lineno"> 4804</span>  <span class="keywordflow">if</span> (params.cp_model_postsolve_with_full_solver()) {</div><div class="line"><a name="l04805"></a><span class="lineno"> 4805</span>  params.<a class="code" href="classoperations__research_1_1sat_1_1_sat_parameters.html#a9fae23a232c99b6dbdd1bfd9be98dba0">set_presolve_blocked_clause</a>(<span class="keyword">false</span>);</div><div class="line"><a name="l04806"></a><span class="lineno"> 4806</span>  }</div><div class="line"><a name="l04807"></a><span class="lineno"> 4807</span> </div><div class="line"><a name="l04808"></a><span class="lineno"> 4808</span>  <span class="comment">// TODO(user): BVA takes times and do not seems to help on the minizinc</span></div><div class="line"><a name="l04809"></a><span class="lineno"> 4809</span>  <span class="comment">// benchmarks. That said, it was useful on pure sat problems, so we may</span></div><div class="line"><a name="l04810"></a><span class="lineno"> 4810</span>  <span class="comment">// want to enable it.</span></div><div class="line"><a name="l04811"></a><span class="lineno"> 4811</span>  params.set_presolve_use_bva(<span class="keyword">false</span>);</div><div class="line"><a name="l04812"></a><span class="lineno"> 4812</span>  sat_presolver.SetParameters(params);</div><div class="line"><a name="l04813"></a><span class="lineno"> 4813</span> </div><div class="line"><a name="l04814"></a><span class="lineno"> 4814</span>  <span class="comment">// Converts a cp_model literal ref to a sat::Literal used by SatPresolver.</span></div><div class="line"><a name="l04815"></a><span class="lineno"> 4815</span>  absl::flat_hash_set<int> used_variables;</div><div class="line"><a name="l04816"></a><span class="lineno"> 4816</span>  <span class="keyword">auto</span> convert = [&used_variables](<span class="keywordtype">int</span> ref) {</div><div class="line"><a name="l04817"></a><span class="lineno"> 4817</span>  used_variables.insert(<a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(ref));</div><div class="line"><a name="l04818"></a><span class="lineno"> 4818</span>  <span class="keywordflow">if</span> (<a class="code" href="namespaceoperations__research_1_1sat.html#a217338425de4389014563f1f24331713">RefIsPositive</a>(ref)) <span class="keywordflow">return</span> Literal(BooleanVariable(ref), <span class="keyword">true</span>);</div><div class="line"><a name="l04819"></a><span class="lineno"> 4819</span>  <span class="keywordflow">return</span> Literal(BooleanVariable(<a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(ref)), <span class="keyword">false</span>);</div><div class="line"><a name="l04820"></a><span class="lineno"> 4820</span>  };</div><div class="line"><a name="l04821"></a><span class="lineno"> 4821</span> </div><div class="line"><a name="l04822"></a><span class="lineno"> 4822</span>  <span class="comment">// We need all Boolean constraints to be presolved before loading them below.</span></div><div class="line"><a name="l04823"></a><span class="lineno"> 4823</span>  <span class="comment">// Otherwise duplicate literals might result in a wrong outcome.</span></div><div class="line"><a name="l04824"></a><span class="lineno"> 4824</span>  <span class="comment">//</span></div><div class="line"><a name="l04825"></a><span class="lineno"> 4825</span>  <span class="comment">// TODO(user): Be a bit more efficient, and enforce this invariant before we</span></div><div class="line"><a name="l04826"></a><span class="lineno"> 4826</span>  <span class="comment">// reach this point?</span></div><div class="line"><a name="l04827"></a><span class="lineno"> 4827</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> c = 0; c < context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#aeaf0da781ca9b370d96b7fbd3f74266a">constraints_size</a>(); ++c) {</div><div class="line"><a name="l04828"></a><span class="lineno"> 4828</span>  <span class="keyword">const</span> ConstraintProto& <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a> = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#afce66afa8ae7776a449bba7313ea3559">constraints</a>(c);</div><div class="line"><a name="l04829"></a><span class="lineno"> 4829</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.constraint_case() == ConstraintProto::ConstraintCase::kBoolOr ||</div><div class="line"><a name="l04830"></a><span class="lineno"> 4830</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.constraint_case() == ConstraintProto::ConstraintCase::kBoolAnd) {</div><div class="line"><a name="l04831"></a><span class="lineno"> 4831</span>  <span class="keywordflow">if</span> (<a class="code" href="classoperations__research_1_1sat_1_1_cp_model_presolver.html#ab37522044009144ac6eff3b3d4c1d271">PresolveOneConstraint</a>(c)) {</div><div class="line"><a name="l04832"></a><span class="lineno"> 4832</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab75a27c0aeda2de9c3957719b8196c36">UpdateConstraintVariableUsage</a>(c);</div><div class="line"><a name="l04833"></a><span class="lineno"> 4833</span>  }</div><div class="line"><a name="l04834"></a><span class="lineno"> 4834</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span>;</div><div class="line"><a name="l04835"></a><span class="lineno"> 4835</span>  }</div><div class="line"><a name="l04836"></a><span class="lineno"> 4836</span>  }</div><div class="line"><a name="l04837"></a><span class="lineno"> 4837</span> </div><div class="line"><a name="l04838"></a><span class="lineno"> 4838</span>  <span class="comment">// Load all Clauses into the presolver and remove them from the current model.</span></div><div class="line"><a name="l04839"></a><span class="lineno"> 4839</span>  <span class="comment">//</span></div><div class="line"><a name="l04840"></a><span class="lineno"> 4840</span>  <span class="comment">// TODO(user): The removing and adding back of the same clause when nothing</span></div><div class="line"><a name="l04841"></a><span class="lineno"> 4841</span>  <span class="comment">// happens in the presolve "seems" bad. That said, complexity wise, it is</span></div><div class="line"><a name="l04842"></a><span class="lineno"> 4842</span>  <span class="comment">// a lot faster that what happens in the presolve though.</span></div><div class="line"><a name="l04843"></a><span class="lineno"> 4843</span>  <span class="comment">//</span></div><div class="line"><a name="l04844"></a><span class="lineno"> 4844</span>  <span class="comment">// TODO(user): Add the "small" at most one constraints to the SAT presolver by</span></div><div class="line"><a name="l04845"></a><span class="lineno"> 4845</span>  <span class="comment">// expanding them to implications? that could remove a lot of clauses. Do that</span></div><div class="line"><a name="l04846"></a><span class="lineno"> 4846</span>  <span class="comment">// when we are sure we don't load duplicates at_most_one/implications in the</span></div><div class="line"><a name="l04847"></a><span class="lineno"> 4847</span>  <span class="comment">// solver. Ideally, the pure sat presolve could be improved to handle at most</span></div><div class="line"><a name="l04848"></a><span class="lineno"> 4848</span>  <span class="comment">// one, and we could merge this with what the ProcessSetPPC() is doing.</span></div><div class="line"><a name="l04849"></a><span class="lineno"> 4849</span>  std::vector<Literal> clause;</div><div class="line"><a name="l04850"></a><span class="lineno"> 4850</span>  <span class="keywordtype">int</span> num_removed_constraints = 0;</div><div class="line"><a name="l04851"></a><span class="lineno"> 4851</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#aeaf0da781ca9b370d96b7fbd3f74266a">constraints_size</a>(); ++i) {</div><div class="line"><a name="l04852"></a><span class="lineno"> 4852</span>  <span class="keyword">const</span> ConstraintProto& <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a> = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#afce66afa8ae7776a449bba7313ea3559">constraints</a>(i);</div><div class="line"><a name="l04853"></a><span class="lineno"> 4853</span> </div><div class="line"><a name="l04854"></a><span class="lineno"> 4854</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.constraint_case() == ConstraintProto::ConstraintCase::kBoolOr) {</div><div class="line"><a name="l04855"></a><span class="lineno"> 4855</span>  ++num_removed_constraints;</div><div class="line"><a name="l04856"></a><span class="lineno"> 4856</span>  clause.clear();</div><div class="line"><a name="l04857"></a><span class="lineno"> 4857</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> ref : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.bool_or().literals()) {</div><div class="line"><a name="l04858"></a><span class="lineno"> 4858</span>  clause.push_back(convert(ref));</div><div class="line"><a name="l04859"></a><span class="lineno"> 4859</span>  }</div><div class="line"><a name="l04860"></a><span class="lineno"> 4860</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> ref : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.enforcement_literal()) {</div><div class="line"><a name="l04861"></a><span class="lineno"> 4861</span>  clause.push_back(convert(ref).Negated());</div><div class="line"><a name="l04862"></a><span class="lineno"> 4862</span>  }</div><div class="line"><a name="l04863"></a><span class="lineno"> 4863</span>  sat_presolver.AddClause(clause);</div><div class="line"><a name="l04864"></a><span class="lineno"> 4864</span> </div><div class="line"><a name="l04865"></a><span class="lineno"> 4865</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a9b3e1bc8b76ea7d2614fd7ec2b066039">mutable_constraints</a>(i)-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#aa0d2b6ddea7cb960b90423ac48f555bf">Clear</a>();</div><div class="line"><a name="l04866"></a><span class="lineno"> 4866</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab75a27c0aeda2de9c3957719b8196c36">UpdateConstraintVariableUsage</a>(i);</div><div class="line"><a name="l04867"></a><span class="lineno"> 4867</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l04868"></a><span class="lineno"> 4868</span>  }</div><div class="line"><a name="l04869"></a><span class="lineno"> 4869</span> </div><div class="line"><a name="l04870"></a><span class="lineno"> 4870</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.constraint_case() == ConstraintProto::ConstraintCase::kBoolAnd) {</div><div class="line"><a name="l04871"></a><span class="lineno"> 4871</span>  ++num_removed_constraints;</div><div class="line"><a name="l04872"></a><span class="lineno"> 4872</span>  std::vector<Literal> clause;</div><div class="line"><a name="l04873"></a><span class="lineno"> 4873</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> ref : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.enforcement_literal()) {</div><div class="line"><a name="l04874"></a><span class="lineno"> 4874</span>  clause.push_back(convert(ref).Negated());</div><div class="line"><a name="l04875"></a><span class="lineno"> 4875</span>  }</div><div class="line"><a name="l04876"></a><span class="lineno"> 4876</span>  clause.push_back(Literal(<a class="code" href="namespaceoperations__research_1_1sat.html#a2dbcb7017d468a17bdb30252af5c6c31">kNoLiteralIndex</a>)); <span class="comment">// will be replaced below.</span></div><div class="line"><a name="l04877"></a><span class="lineno"> 4877</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> ref : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.bool_and().literals()) {</div><div class="line"><a name="l04878"></a><span class="lineno"> 4878</span>  clause.back() = convert(ref);</div><div class="line"><a name="l04879"></a><span class="lineno"> 4879</span>  sat_presolver.AddClause(clause);</div><div class="line"><a name="l04880"></a><span class="lineno"> 4880</span>  }</div><div class="line"><a name="l04881"></a><span class="lineno"> 4881</span> </div><div class="line"><a name="l04882"></a><span class="lineno"> 4882</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a9b3e1bc8b76ea7d2614fd7ec2b066039">mutable_constraints</a>(i)-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#aa0d2b6ddea7cb960b90423ac48f555bf">Clear</a>();</div><div class="line"><a name="l04883"></a><span class="lineno"> 4883</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab75a27c0aeda2de9c3957719b8196c36">UpdateConstraintVariableUsage</a>(i);</div><div class="line"><a name="l04884"></a><span class="lineno"> 4884</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l04885"></a><span class="lineno"> 4885</span>  }</div><div class="line"><a name="l04886"></a><span class="lineno"> 4886</span>  }</div><div class="line"><a name="l04887"></a><span class="lineno"> 4887</span> </div><div class="line"><a name="l04888"></a><span class="lineno"> 4888</span>  <span class="comment">// Abort early if there was no Boolean constraints.</span></div><div class="line"><a name="l04889"></a><span class="lineno"> 4889</span>  <span class="keywordflow">if</span> (num_removed_constraints == 0) <span class="keywordflow">return</span>;</div><div class="line"><a name="l04890"></a><span class="lineno"> 4890</span> </div><div class="line"><a name="l04891"></a><span class="lineno"> 4891</span>  <span class="comment">// Mark the variables appearing elsewhere or in the objective as non-removable</span></div><div class="line"><a name="l04892"></a><span class="lineno"> 4892</span>  <span class="comment">// by the sat presolver.</span></div><div class="line"><a name="l04893"></a><span class="lineno"> 4893</span>  <span class="comment">//</span></div><div class="line"><a name="l04894"></a><span class="lineno"> 4894</span>  <span class="comment">// TODO(user): do not remove variable that appear in the decision heuristic?</span></div><div class="line"><a name="l04895"></a><span class="lineno"> 4895</span>  <span class="comment">// TODO(user): We could go further for variable with only one polarity by</span></div><div class="line"><a name="l04896"></a><span class="lineno"> 4896</span>  <span class="comment">// removing variable from the objective if they can be set to their "low"</span></div><div class="line"><a name="l04897"></a><span class="lineno"> 4897</span>  <span class="comment">// objective value, and also removing enforcement literal that can be set to</span></div><div class="line"><a name="l04898"></a><span class="lineno"> 4898</span>  <span class="comment">// false and don't appear elsewhere.</span></div><div class="line"><a name="l04899"></a><span class="lineno"> 4899</span>  std::vector<bool> can_be_removed(num_variables, <span class="keyword">false</span>);</div><div class="line"><a name="l04900"></a><span class="lineno"> 4900</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num_variables; ++i) {</div><div class="line"><a name="l04901"></a><span class="lineno"> 4901</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#acf72cafd3dab9ac4b5e5b1a3aaa75192">VarToConstraints</a>(i).empty()) {</div><div class="line"><a name="l04902"></a><span class="lineno"> 4902</span>  can_be_removed[i] = <span class="keyword">true</span>;</div><div class="line"><a name="l04903"></a><span class="lineno"> 4903</span>  }</div><div class="line"><a name="l04904"></a><span class="lineno"> 4904</span> </div><div class="line"><a name="l04905"></a><span class="lineno"> 4905</span>  <span class="comment">// Because we might not have reached the presove "fixed point" above, some</span></div><div class="line"><a name="l04906"></a><span class="lineno"> 4906</span>  <span class="comment">// variable in the added clauses might be fixed. We need to indicate this to</span></div><div class="line"><a name="l04907"></a><span class="lineno"> 4907</span>  <span class="comment">// the SAT presolver.</span></div><div class="line"><a name="l04908"></a><span class="lineno"> 4908</span>  <span class="keywordflow">if</span> (used_variables.contains(i) && context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#abb6eb29f56c3a33b8ae1b74b08b755c2">IsFixed</a>(i)) {</div><div class="line"><a name="l04909"></a><span class="lineno"> 4909</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a890f923209473cf55ac002d1b14bd9e2">LiteralIsTrue</a>(i)) {</div><div class="line"><a name="l04910"></a><span class="lineno"> 4910</span>  sat_presolver.AddClause({convert(i)});</div><div class="line"><a name="l04911"></a><span class="lineno"> 4911</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l04912"></a><span class="lineno"> 4912</span>  sat_presolver.AddClause({convert(<a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(i))});</div><div class="line"><a name="l04913"></a><span class="lineno"> 4913</span>  }</div><div class="line"><a name="l04914"></a><span class="lineno"> 4914</span>  }</div><div class="line"><a name="l04915"></a><span class="lineno"> 4915</span>  }</div><div class="line"><a name="l04916"></a><span class="lineno"> 4916</span> </div><div class="line"><a name="l04917"></a><span class="lineno"> 4917</span>  <span class="comment">// Run the presolve for a small number of passes.</span></div><div class="line"><a name="l04918"></a><span class="lineno"> 4918</span>  <span class="comment">// TODO(user): Add probing like we do in the pure sat solver presolve loop?</span></div><div class="line"><a name="l04919"></a><span class="lineno"> 4919</span>  <span class="comment">// TODO(user): Add a time limit, this can be slow on big SAT problem.</span></div><div class="line"><a name="l04920"></a><span class="lineno"> 4920</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> num_passes = params.presolve_use_bva() ? 4 : 1;</div><div class="line"><a name="l04921"></a><span class="lineno"> 4921</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num_passes; ++i) {</div><div class="line"><a name="l04922"></a><span class="lineno"> 4922</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> old_num_clause = sat_postsolver.NumClauses();</div><div class="line"><a name="l04923"></a><span class="lineno"> 4923</span>  <span class="keywordflow">if</span> (!sat_presolver.Presolve(can_be_removed)) {</div><div class="line"><a name="l04924"></a><span class="lineno"> 4924</span>  <a class="code" href="base_2logging_8h.html#afcaa7cadd41741bb855c2ada1d2ef927">VLOG</a>(1) << <span class="stringliteral">"UNSAT during SAT presolve."</span>;</div><div class="line"><a name="l04925"></a><span class="lineno"> 4925</span>  <span class="keywordflow">return</span> (<span class="keywordtype">void</span>)context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5aa53538ba8adaa0bea1c3c0727425b0">NotifyThatModelIsUnsat</a>();</div><div class="line"><a name="l04926"></a><span class="lineno"> 4926</span>  }</div><div class="line"><a name="l04927"></a><span class="lineno"> 4927</span>  <span class="keywordflow">if</span> (old_num_clause == sat_postsolver.NumClauses()) <span class="keywordflow">break</span>;</div><div class="line"><a name="l04928"></a><span class="lineno"> 4928</span>  }</div><div class="line"><a name="l04929"></a><span class="lineno"> 4929</span> </div><div class="line"><a name="l04930"></a><span class="lineno"> 4930</span>  <span class="comment">// Add any new variables to our internal structure.</span></div><div class="line"><a name="l04931"></a><span class="lineno"> 4931</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> new_num_variables = sat_presolver.NumVariables();</div><div class="line"><a name="l04932"></a><span class="lineno"> 4932</span>  <span class="keywordflow">if</span> (new_num_variables > context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#abef5f55c3278c137faca92b8e433f8ea">variables_size</a>()) {</div><div class="line"><a name="l04933"></a><span class="lineno"> 4933</span>  <a class="code" href="base_2logging_8h.html#afcaa7cadd41741bb855c2ada1d2ef927">VLOG</a>(1) << <span class="stringliteral">"New variables added by the SAT presolver."</span>;</div><div class="line"><a name="l04934"></a><span class="lineno"> 4934</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#abef5f55c3278c137faca92b8e433f8ea">variables_size</a>();</div><div class="line"><a name="l04935"></a><span class="lineno"> 4935</span>  i < new_num_variables; ++i) {</div><div class="line"><a name="l04936"></a><span class="lineno"> 4936</span>  IntegerVariableProto* var_proto =</div><div class="line"><a name="l04937"></a><span class="lineno"> 4937</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ad03d1e2f94c4ca4c8004ac5355e6504a">add_variables</a>();</div><div class="line"><a name="l04938"></a><span class="lineno"> 4938</span>  var_proto-><a class="code" href="classoperations__research_1_1sat_1_1_integer_variable_proto.html#a2266c77ad6db8de45560357c1436e558">add_domain</a>(0);</div><div class="line"><a name="l04939"></a><span class="lineno"> 4939</span>  var_proto->add_domain(1);</div><div class="line"><a name="l04940"></a><span class="lineno"> 4940</span>  }</div><div class="line"><a name="l04941"></a><span class="lineno"> 4941</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a62cd771660767621e917b2c256182c4e">InitializeNewDomains</a>();</div><div class="line"><a name="l04942"></a><span class="lineno"> 4942</span>  }</div><div class="line"><a name="l04943"></a><span class="lineno"> 4943</span> </div><div class="line"><a name="l04944"></a><span class="lineno"> 4944</span>  <span class="comment">// Add the presolver clauses back into the model.</span></div><div class="line"><a name="l04945"></a><span class="lineno"> 4945</span>  ExtractClauses(<span class="comment">/*use_bool_and=*/</span><span class="keyword">true</span>, sat_presolver, context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>);</div><div class="line"><a name="l04946"></a><span class="lineno"> 4946</span> </div><div class="line"><a name="l04947"></a><span class="lineno"> 4947</span>  <span class="comment">// Update the constraints <-> variables graph.</span></div><div class="line"><a name="l04948"></a><span class="lineno"> 4948</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l04949"></a><span class="lineno"> 4949</span> </div><div class="line"><a name="l04950"></a><span class="lineno"> 4950</span>  <span class="comment">// Add the sat_postsolver clauses to mapping_model.</span></div><div class="line"><a name="l04951"></a><span class="lineno"> 4951</span>  <span class="comment">//</span></div><div class="line"><a name="l04952"></a><span class="lineno"> 4952</span>  <span class="comment">// TODO(user): Mark removed variable as removed to detect any potential bugs.</span></div><div class="line"><a name="l04953"></a><span class="lineno"> 4953</span>  ExtractClauses(<span class="comment">/*use_bool_and=*/</span><span class="keyword">false</span>, sat_postsolver,</div><div class="line"><a name="l04954"></a><span class="lineno"> 4954</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a4b3b9ef9c5f214dd4427daa2646eceda">mapping_model</a>);</div><div class="line"><a name="l04955"></a><span class="lineno"> 4955</span> }</div><div class="line"><a name="l04956"></a><span class="lineno"> 4956</span> </div><div class="line"><a name="l04957"></a><span class="lineno"> 4957</span> <span class="comment">// TODO(user): The idea behind this was that it is better to have an objective</span></div><div class="line"><a name="l04958"></a><span class="lineno"> 4958</span> <span class="comment">// as spreaded as possible. However on some problems this have the opposite</span></div><div class="line"><a name="l04959"></a><span class="lineno"> 4959</span> <span class="comment">// effect. Like on a triangular matrix where each expansion reduced the size</span></div><div class="line"><a name="l04960"></a><span class="lineno"> 4960</span> <span class="comment">// of the objective by one. Investigate and fix?</span></div><div class="line"><a name="l04961"></a><span class="lineno"> 4961</span> <span class="keywordtype">void</span> CpModelPresolver::ExpandObjective() {</div><div class="line"><a name="l04962"></a><span class="lineno"> 4962</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span>;</div><div class="line"><a name="l04963"></a><span class="lineno"> 4963</span> </div><div class="line"><a name="l04964"></a><span class="lineno"> 4964</span>  <span class="comment">// The objective is already loaded in the constext, but we re-canonicalize</span></div><div class="line"><a name="l04965"></a><span class="lineno"> 4965</span>  <span class="comment">// it with the latest information.</span></div><div class="line"><a name="l04966"></a><span class="lineno"> 4966</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa62da782b2270ca293531a0aea153fba">CanonicalizeObjective</a>()) {</div><div class="line"><a name="l04967"></a><span class="lineno"> 4967</span>  (void)context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5aa53538ba8adaa0bea1c3c0727425b0">NotifyThatModelIsUnsat</a>();</div><div class="line"><a name="l04968"></a><span class="lineno"> 4968</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l04969"></a><span class="lineno"> 4969</span>  }</div><div class="line"><a name="l04970"></a><span class="lineno"> 4970</span> </div><div class="line"><a name="l04971"></a><span class="lineno"> 4971</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a0704cc50211ab739309aa9f54aa8c606">time_limit</a>()-><a class="code" href="classoperations__research_1_1_time_limit.html#a810d5f7aaf80cc09cf5a094e20c1aaca">LimitReached</a>()) {</div><div class="line"><a name="l04972"></a><span class="lineno"> 4972</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a36794cf424ca2d69bc4774437a61a88e">WriteObjectiveToProto</a>();</div><div class="line"><a name="l04973"></a><span class="lineno"> 4973</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l04974"></a><span class="lineno"> 4974</span>  }</div><div class="line"><a name="l04975"></a><span class="lineno"> 4975</span> </div><div class="line"><a name="l04976"></a><span class="lineno"> 4976</span>  <span class="comment">// If the objective is a single variable, then we can usually remove this</span></div><div class="line"><a name="l04977"></a><span class="lineno"> 4977</span>  <span class="comment">// variable if it is only used in one linear equality constraint and we do</span></div><div class="line"><a name="l04978"></a><span class="lineno"> 4978</span>  <span class="comment">// just one expansion. This is because the domain of the variable will be</span></div><div class="line"><a name="l04979"></a><span class="lineno"> 4979</span>  <span class="comment">// transferred to our objective_domain.</span></div><div class="line"><a name="l04980"></a><span class="lineno"> 4980</span>  <span class="keywordtype">int</span> unique_expanded_constraint = -1;</div><div class="line"><a name="l04981"></a><span class="lineno"> 4981</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> objective_was_a_single_variable =</div><div class="line"><a name="l04982"></a><span class="lineno"> 4982</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a66fc178adf4c7e56b3a6f1a5e052d3e5">ObjectiveMap</a>().size() == 1;</div><div class="line"><a name="l04983"></a><span class="lineno"> 4983</span> </div><div class="line"><a name="l04984"></a><span class="lineno"> 4984</span>  <span class="comment">// To avoid a bad complexity, we need to compute the number of relevant</span></div><div class="line"><a name="l04985"></a><span class="lineno"> 4985</span>  <span class="comment">// constraints for each variables.</span></div><div class="line"><a name="l04986"></a><span class="lineno"> 4986</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> num_variables = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#abef5f55c3278c137faca92b8e433f8ea">variables_size</a>();</div><div class="line"><a name="l04987"></a><span class="lineno"> 4987</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> num_constraints = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#aeaf0da781ca9b370d96b7fbd3f74266a">constraints_size</a>();</div><div class="line"><a name="l04988"></a><span class="lineno"> 4988</span>  absl::flat_hash_set<int> relevant_constraints;</div><div class="line"><a name="l04989"></a><span class="lineno"> 4989</span>  std::vector<int> var_to_num_relevant_constraints(num_variables, 0);</div><div class="line"><a name="l04990"></a><span class="lineno"> 4990</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> ct_index = 0; ct_index < num_constraints; ++ct_index) {</div><div class="line"><a name="l04991"></a><span class="lineno"> 4991</span>  <span class="keyword">const</span> ConstraintProto& <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a> = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#afce66afa8ae7776a449bba7313ea3559">constraints</a>(ct_index);</div><div class="line"><a name="l04992"></a><span class="lineno"> 4992</span>  <span class="comment">// Skip everything that is not a linear equality constraint.</span></div><div class="line"><a name="l04993"></a><span class="lineno"> 4993</span>  <span class="keywordflow">if</span> (!<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.enforcement_literal().empty() ||</div><div class="line"><a name="l04994"></a><span class="lineno"> 4994</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.constraint_case() != ConstraintProto::ConstraintCase::kLinear ||</div><div class="line"><a name="l04995"></a><span class="lineno"> 4995</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.linear().domain().size() != 2 ||</div><div class="line"><a name="l04996"></a><span class="lineno"> 4996</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.linear().domain(0) != <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.linear().domain(1)) {</div><div class="line"><a name="l04997"></a><span class="lineno"> 4997</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l04998"></a><span class="lineno"> 4998</span>  }</div><div class="line"><a name="l04999"></a><span class="lineno"> 4999</span> </div><div class="line"><a name="l05000"></a><span class="lineno"> 5000</span>  relevant_constraints.insert(ct_index);</div><div class="line"><a name="l05001"></a><span class="lineno"> 5001</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> num_terms = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.linear().vars_size();</div><div class="line"><a name="l05002"></a><span class="lineno"> 5002</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num_terms; ++i) {</div><div class="line"><a name="l05003"></a><span class="lineno"> 5003</span>  var_to_num_relevant_constraints[<a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.linear().vars(i))]++;</div><div class="line"><a name="l05004"></a><span class="lineno"> 5004</span>  }</div><div class="line"><a name="l05005"></a><span class="lineno"> 5005</span>  }</div><div class="line"><a name="l05006"></a><span class="lineno"> 5006</span> </div><div class="line"><a name="l05007"></a><span class="lineno"> 5007</span>  std::set<int> var_to_process;</div><div class="line"><a name="l05008"></a><span class="lineno"> 5008</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span> entry : context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a66fc178adf4c7e56b3a6f1a5e052d3e5">ObjectiveMap</a>()) {</div><div class="line"><a name="l05009"></a><span class="lineno"> 5009</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = entry.first;</div><div class="line"><a name="l05010"></a><span class="lineno"> 5010</span>  <a class="code" href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a>(<a class="code" href="namespaceoperations__research_1_1sat.html#a217338425de4389014563f1f24331713">RefIsPositive</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>));</div><div class="line"><a name="l05011"></a><span class="lineno"> 5011</span>  <span class="keywordflow">if</span> (var_to_num_relevant_constraints[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>] != 0) {</div><div class="line"><a name="l05012"></a><span class="lineno"> 5012</span>  var_to_process.insert(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l05013"></a><span class="lineno"> 5013</span>  }</div><div class="line"><a name="l05014"></a><span class="lineno"> 5014</span>  }</div><div class="line"><a name="l05015"></a><span class="lineno"> 5015</span> </div><div class="line"><a name="l05016"></a><span class="lineno"> 5016</span>  <span class="comment">// We currently never expand a variable more than once.</span></div><div class="line"><a name="l05017"></a><span class="lineno"> 5017</span>  <span class="keywordtype">int</span> num_expansions = 0;</div><div class="line"><a name="l05018"></a><span class="lineno"> 5018</span>  <span class="keywordtype">int</span> last_expanded_objective_var;</div><div class="line"><a name="l05019"></a><span class="lineno"> 5019</span>  absl::flat_hash_set<int> processed_vars;</div><div class="line"><a name="l05020"></a><span class="lineno"> 5020</span>  std::vector<int> new_vars_in_objective;</div><div class="line"><a name="l05021"></a><span class="lineno"> 5021</span>  <span class="keywordflow">while</span> (!relevant_constraints.empty()) {</div><div class="line"><a name="l05022"></a><span class="lineno"> 5022</span>  <span class="comment">// Find a not yet expanded var.</span></div><div class="line"><a name="l05023"></a><span class="lineno"> 5023</span>  <span class="keywordtype">int</span> objective_var = -1;</div><div class="line"><a name="l05024"></a><span class="lineno"> 5024</span>  <span class="keywordflow">while</span> (!var_to_process.empty()) {</div><div class="line"><a name="l05025"></a><span class="lineno"> 5025</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = *var_to_process.begin();</div><div class="line"><a name="l05026"></a><span class="lineno"> 5026</span>  <a class="code" href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a>(!processed_vars.contains(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>));</div><div class="line"><a name="l05027"></a><span class="lineno"> 5027</span>  <span class="keywordflow">if</span> (var_to_num_relevant_constraints[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>] == 0) {</div><div class="line"><a name="l05028"></a><span class="lineno"> 5028</span>  processed_vars.insert(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l05029"></a><span class="lineno"> 5029</span>  var_to_process.erase(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l05030"></a><span class="lineno"> 5030</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l05031"></a><span class="lineno"> 5031</span>  }</div><div class="line"><a name="l05032"></a><span class="lineno"> 5032</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a66fc178adf4c7e56b3a6f1a5e052d3e5">ObjectiveMap</a>().contains(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) {</div><div class="line"><a name="l05033"></a><span class="lineno"> 5033</span>  <span class="comment">// We do not mark it as processed in case it re-appear later.</span></div><div class="line"><a name="l05034"></a><span class="lineno"> 5034</span>  var_to_process.erase(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l05035"></a><span class="lineno"> 5035</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l05036"></a><span class="lineno"> 5036</span>  }</div><div class="line"><a name="l05037"></a><span class="lineno"> 5037</span>  objective_var = <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>;</div><div class="line"><a name="l05038"></a><span class="lineno"> 5038</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l05039"></a><span class="lineno"> 5039</span>  }</div><div class="line"><a name="l05040"></a><span class="lineno"> 5040</span> </div><div class="line"><a name="l05041"></a><span class="lineno"> 5041</span>  <span class="keywordflow">if</span> (objective_var == -1) <span class="keywordflow">break</span>;</div><div class="line"><a name="l05042"></a><span class="lineno"> 5042</span>  <a class="code" href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a>(<a class="code" href="namespaceoperations__research_1_1sat.html#a217338425de4389014563f1f24331713">RefIsPositive</a>(objective_var));</div><div class="line"><a name="l05043"></a><span class="lineno"> 5043</span>  processed_vars.insert(objective_var);</div><div class="line"><a name="l05044"></a><span class="lineno"> 5044</span>  var_to_process.erase(objective_var);</div><div class="line"><a name="l05045"></a><span class="lineno"> 5045</span> </div><div class="line"><a name="l05046"></a><span class="lineno"> 5046</span>  <span class="keywordtype">int</span> expanded_linear_index = -1;</div><div class="line"><a name="l05047"></a><span class="lineno"> 5047</span>  int64_t objective_coeff_in_expanded_constraint;</div><div class="line"><a name="l05048"></a><span class="lineno"> 5048</span>  int64_t size_of_expanded_constraint = 0;</div><div class="line"><a name="l05049"></a><span class="lineno"> 5049</span>  <span class="keyword">const</span> <span class="keyword">auto</span>& non_deterministic_list =</div><div class="line"><a name="l05050"></a><span class="lineno"> 5050</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#acf72cafd3dab9ac4b5e5b1a3aaa75192">VarToConstraints</a>(objective_var);</div><div class="line"><a name="l05051"></a><span class="lineno"> 5051</span>  std::vector<int> constraints_with_objective(non_deterministic_list.begin(),</div><div class="line"><a name="l05052"></a><span class="lineno"> 5052</span>  non_deterministic_list.end());</div><div class="line"><a name="l05053"></a><span class="lineno"> 5053</span>  std::sort(constraints_with_objective.begin(),</div><div class="line"><a name="l05054"></a><span class="lineno"> 5054</span>  constraints_with_objective.end());</div><div class="line"><a name="l05055"></a><span class="lineno"> 5055</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> ct_index : constraints_with_objective) {</div><div class="line"><a name="l05056"></a><span class="lineno"> 5056</span>  <span class="keywordflow">if</span> (relevant_constraints.count(ct_index) == 0) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l05057"></a><span class="lineno"> 5057</span>  <span class="keyword">const</span> ConstraintProto& <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a> =</div><div class="line"><a name="l05058"></a><span class="lineno"> 5058</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#afce66afa8ae7776a449bba7313ea3559">constraints</a>(ct_index);</div><div class="line"><a name="l05059"></a><span class="lineno"> 5059</span> </div><div class="line"><a name="l05060"></a><span class="lineno"> 5060</span>  <span class="comment">// This constraint is relevant now, but it will never be later because</span></div><div class="line"><a name="l05061"></a><span class="lineno"> 5061</span>  <span class="comment">// it will contain the objective_var which is already processed!</span></div><div class="line"><a name="l05062"></a><span class="lineno"> 5062</span>  relevant_constraints.erase(ct_index);</div><div class="line"><a name="l05063"></a><span class="lineno"> 5063</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> num_terms = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.linear().vars_size();</div><div class="line"><a name="l05064"></a><span class="lineno"> 5064</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num_terms; ++i) {</div><div class="line"><a name="l05065"></a><span class="lineno"> 5065</span>  var_to_num_relevant_constraints[<a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.linear().vars(i))]--;</div><div class="line"><a name="l05066"></a><span class="lineno"> 5066</span>  }</div><div class="line"><a name="l05067"></a><span class="lineno"> 5067</span> </div><div class="line"><a name="l05068"></a><span class="lineno"> 5068</span>  <span class="comment">// Find the coefficient of objective_var in this constraint, and perform</span></div><div class="line"><a name="l05069"></a><span class="lineno"> 5069</span>  <span class="comment">// various checks.</span></div><div class="line"><a name="l05070"></a><span class="lineno"> 5070</span>  <span class="comment">//</span></div><div class="line"><a name="l05071"></a><span class="lineno"> 5071</span>  <span class="comment">// TODO(user): This can crash the program if for some reason the linear</span></div><div class="line"><a name="l05072"></a><span class="lineno"> 5072</span>  <span class="comment">// constraint was not canonicalized and contains the objective variable</span></div><div class="line"><a name="l05073"></a><span class="lineno"> 5073</span>  <span class="comment">// twice. Currently this can only happen if the time limit was reached</span></div><div class="line"><a name="l05074"></a><span class="lineno"> 5074</span>  <span class="comment">// before all constraints where processed, but because we abort at the</span></div><div class="line"><a name="l05075"></a><span class="lineno"> 5075</span>  <span class="comment">// beginning of the function when this is the case we should be safe.</span></div><div class="line"><a name="l05076"></a><span class="lineno"> 5076</span>  <span class="comment">// However, it might be more robust to just handle this case properly.</span></div><div class="line"><a name="l05077"></a><span class="lineno"> 5077</span>  <span class="keywordtype">bool</span> is_present = <span class="keyword">false</span>;</div><div class="line"><a name="l05078"></a><span class="lineno"> 5078</span>  int64_t objective_coeff;</div><div class="line"><a name="l05079"></a><span class="lineno"> 5079</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num_terms; ++i) {</div><div class="line"><a name="l05080"></a><span class="lineno"> 5080</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> ref = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.linear().vars(i);</div><div class="line"><a name="l05081"></a><span class="lineno"> 5081</span>  <span class="keyword">const</span> int64_t coeff = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.linear().coeffs(i);</div><div class="line"><a name="l05082"></a><span class="lineno"> 5082</span>  <span class="keywordflow">if</span> (<a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(ref) == objective_var) {</div><div class="line"><a name="l05083"></a><span class="lineno"> 5083</span>  <a class="code" href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a>(!is_present) << <span class="stringliteral">"Duplicate variables not supported."</span>;</div><div class="line"><a name="l05084"></a><span class="lineno"> 5084</span>  is_present = <span class="keyword">true</span>;</div><div class="line"><a name="l05085"></a><span class="lineno"> 5085</span>  objective_coeff = (ref == objective_var) ? coeff : -coeff;</div><div class="line"><a name="l05086"></a><span class="lineno"> 5086</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l05087"></a><span class="lineno"> 5087</span>  <span class="comment">// This is not possible since we only consider relevant constraints.</span></div><div class="line"><a name="l05088"></a><span class="lineno"> 5088</span>  <a class="code" href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a>(!processed_vars.contains(<a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(ref)));</div><div class="line"><a name="l05089"></a><span class="lineno"> 5089</span>  }</div><div class="line"><a name="l05090"></a><span class="lineno"> 5090</span>  }</div><div class="line"><a name="l05091"></a><span class="lineno"> 5091</span>  <a class="code" href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a>(is_present);</div><div class="line"><a name="l05092"></a><span class="lineno"> 5092</span> </div><div class="line"><a name="l05093"></a><span class="lineno"> 5093</span>  <span class="comment">// We use the longest equality we can find.</span></div><div class="line"><a name="l05094"></a><span class="lineno"> 5094</span>  <span class="comment">//</span></div><div class="line"><a name="l05095"></a><span class="lineno"> 5095</span>  <span class="comment">// TODO(user): Deal with objective_coeff with a magnitude greater than</span></div><div class="line"><a name="l05096"></a><span class="lineno"> 5096</span>  <span class="comment">// 1? This will only be possible if we change the objective coeff type</span></div><div class="line"><a name="l05097"></a><span class="lineno"> 5097</span>  <span class="comment">// to double.</span></div><div class="line"><a name="l05098"></a><span class="lineno"> 5098</span>  <span class="keywordflow">if</span> (std::abs(objective_coeff) == 1 &&</div><div class="line"><a name="l05099"></a><span class="lineno"> 5099</span>  num_terms > size_of_expanded_constraint) {</div><div class="line"><a name="l05100"></a><span class="lineno"> 5100</span>  expanded_linear_index = ct_index;</div><div class="line"><a name="l05101"></a><span class="lineno"> 5101</span>  size_of_expanded_constraint = num_terms;</div><div class="line"><a name="l05102"></a><span class="lineno"> 5102</span>  objective_coeff_in_expanded_constraint = objective_coeff;</div><div class="line"><a name="l05103"></a><span class="lineno"> 5103</span>  }</div><div class="line"><a name="l05104"></a><span class="lineno"> 5104</span>  }</div><div class="line"><a name="l05105"></a><span class="lineno"> 5105</span> </div><div class="line"><a name="l05106"></a><span class="lineno"> 5106</span>  <span class="keywordflow">if</span> (expanded_linear_index != -1) {</div><div class="line"><a name="l05107"></a><span class="lineno"> 5107</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"objective: expanded objective constraint."</span>);</div><div class="line"><a name="l05108"></a><span class="lineno"> 5108</span> </div><div class="line"><a name="l05109"></a><span class="lineno"> 5109</span>  <span class="comment">// Update the objective map. Note that the division is possible because</span></div><div class="line"><a name="l05110"></a><span class="lineno"> 5110</span>  <span class="comment">// currently we only expand with coeff with a magnitude of 1.</span></div><div class="line"><a name="l05111"></a><span class="lineno"> 5111</span>  <a class="code" href="base_2logging_8h.html#a7c0ce053b28d53aa4eaf3eb7fb71663b">CHECK_EQ</a>(std::abs(objective_coeff_in_expanded_constraint), 1);</div><div class="line"><a name="l05112"></a><span class="lineno"> 5112</span>  <span class="keyword">const</span> ConstraintProto& <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a> =</div><div class="line"><a name="l05113"></a><span class="lineno"> 5113</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#afce66afa8ae7776a449bba7313ea3559">constraints</a>(expanded_linear_index);</div><div class="line"><a name="l05114"></a><span class="lineno"> 5114</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a4bf47c6b5724e9a3a7df78486f9bdc41">SubstituteVariableInObjective</a>(</div><div class="line"><a name="l05115"></a><span class="lineno"> 5115</span>  objective_var, objective_coeff_in_expanded_constraint, <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>,</div><div class="line"><a name="l05116"></a><span class="lineno"> 5116</span>  &new_vars_in_objective);</div><div class="line"><a name="l05117"></a><span class="lineno"> 5117</span> </div><div class="line"><a name="l05118"></a><span class="lineno"> 5118</span>  <span class="comment">// Add not yet processed new variables.</span></div><div class="line"><a name="l05119"></a><span class="lineno"> 5119</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> : new_vars_in_objective) {</div><div class="line"><a name="l05120"></a><span class="lineno"> 5120</span>  <span class="keywordflow">if</span> (!processed_vars.contains(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) var_to_process.insert(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l05121"></a><span class="lineno"> 5121</span>  }</div><div class="line"><a name="l05122"></a><span class="lineno"> 5122</span> </div><div class="line"><a name="l05123"></a><span class="lineno"> 5123</span>  <span class="comment">// If the objective variable wasn't used in other constraints and it can</span></div><div class="line"><a name="l05124"></a><span class="lineno"> 5124</span>  <span class="comment">// be reconstructed whatever the value of the other variables, we can</span></div><div class="line"><a name="l05125"></a><span class="lineno"> 5125</span>  <span class="comment">// remove the constraint.</span></div><div class="line"><a name="l05126"></a><span class="lineno"> 5126</span>  <span class="comment">//</span></div><div class="line"><a name="l05127"></a><span class="lineno"> 5127</span>  <span class="comment">// TODO(user): It should be possible to refactor the code so this is</span></div><div class="line"><a name="l05128"></a><span class="lineno"> 5128</span>  <span class="comment">// automatically done by the linear constraint singleton presolve rule.</span></div><div class="line"><a name="l05129"></a><span class="lineno"> 5129</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#acf72cafd3dab9ac4b5e5b1a3aaa75192">VarToConstraints</a>(objective_var).size() == 1 &&</div><div class="line"><a name="l05130"></a><span class="lineno"> 5130</span>  !context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab7b13b808e3dea6fc1e4006f7134e9f9">keep_all_feasible_solutions</a>) {</div><div class="line"><a name="l05131"></a><span class="lineno"> 5131</span>  <span class="comment">// Compute implied domain on objective_var.</span></div><div class="line"><a name="l05132"></a><span class="lineno"> 5132</span>  Domain implied_domain = <a class="code" href="namespaceoperations__research_1_1sat.html#ab1240060466ba48a36a4b36379bce26a">ReadDomainFromProto</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.linear());</div><div class="line"><a name="l05133"></a><span class="lineno"> 5133</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < size_of_expanded_constraint; ++i) {</div><div class="line"><a name="l05134"></a><span class="lineno"> 5134</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> ref = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.linear().vars(i);</div><div class="line"><a name="l05135"></a><span class="lineno"> 5135</span>  <span class="keywordflow">if</span> (<a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(ref) == objective_var) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l05136"></a><span class="lineno"> 5136</span>  implied_domain =</div><div class="line"><a name="l05137"></a><span class="lineno"> 5137</span>  implied_domain</div><div class="line"><a name="l05138"></a><span class="lineno"> 5138</span>  .AdditionWith(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(ref).<a class="code" href="classoperations__research_1_1_domain.html#a63a708c626b59b4504ddb879496c894e">MultiplicationBy</a>(</div><div class="line"><a name="l05139"></a><span class="lineno"> 5139</span>  -<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.linear().coeffs(i)))</div><div class="line"><a name="l05140"></a><span class="lineno"> 5140</span>  .RelaxIfTooComplex();</div><div class="line"><a name="l05141"></a><span class="lineno"> 5141</span>  }</div><div class="line"><a name="l05142"></a><span class="lineno"> 5142</span>  implied_domain = implied_domain.InverseMultiplicationBy(</div><div class="line"><a name="l05143"></a><span class="lineno"> 5143</span>  objective_coeff_in_expanded_constraint);</div><div class="line"><a name="l05144"></a><span class="lineno"> 5144</span> </div><div class="line"><a name="l05145"></a><span class="lineno"> 5145</span>  <span class="comment">// Remove the constraint if the implied domain is included in the</span></div><div class="line"><a name="l05146"></a><span class="lineno"> 5146</span>  <span class="comment">// domain of the objective_var term.</span></div><div class="line"><a name="l05147"></a><span class="lineno"> 5147</span>  <span class="keywordflow">if</span> (implied_domain.IsIncludedIn(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(objective_var))) {</div><div class="line"><a name="l05148"></a><span class="lineno"> 5148</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a6939dc7b9db01cf3deff10405e260461">MarkVariableAsRemoved</a>(objective_var);</div><div class="line"><a name="l05149"></a><span class="lineno"> 5149</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"objective: removed objective constraint."</span>);</div><div class="line"><a name="l05150"></a><span class="lineno"> 5150</span>  *(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a4b3b9ef9c5f214dd4427daa2646eceda">mapping_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>()) = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>;</div><div class="line"><a name="l05151"></a><span class="lineno"> 5151</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a9b3e1bc8b76ea7d2614fd7ec2b066039">mutable_constraints</a>(expanded_linear_index)</div><div class="line"><a name="l05152"></a><span class="lineno"> 5152</span>  -><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#aa0d2b6ddea7cb960b90423ac48f555bf">Clear</a>();</div><div class="line"><a name="l05153"></a><span class="lineno"> 5153</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab75a27c0aeda2de9c3957719b8196c36">UpdateConstraintVariableUsage</a>(expanded_linear_index);</div><div class="line"><a name="l05154"></a><span class="lineno"> 5154</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l05155"></a><span class="lineno"> 5155</span>  unique_expanded_constraint = expanded_linear_index;</div><div class="line"><a name="l05156"></a><span class="lineno"> 5156</span>  }</div><div class="line"><a name="l05157"></a><span class="lineno"> 5157</span>  }</div><div class="line"><a name="l05158"></a><span class="lineno"> 5158</span> </div><div class="line"><a name="l05159"></a><span class="lineno"> 5159</span>  ++num_expansions;</div><div class="line"><a name="l05160"></a><span class="lineno"> 5160</span>  last_expanded_objective_var = objective_var;</div><div class="line"><a name="l05161"></a><span class="lineno"> 5161</span>  }</div><div class="line"><a name="l05162"></a><span class="lineno"> 5162</span>  }</div><div class="line"><a name="l05163"></a><span class="lineno"> 5163</span> </div><div class="line"><a name="l05164"></a><span class="lineno"> 5164</span>  <span class="comment">// Special case: If we just did one expansion of a single variable, then we</span></div><div class="line"><a name="l05165"></a><span class="lineno"> 5165</span>  <span class="comment">// can remove the expanded constraints if the objective wasn't used elsewhere.</span></div><div class="line"><a name="l05166"></a><span class="lineno"> 5166</span>  <span class="keywordflow">if</span> (num_expansions == 1 && objective_was_a_single_variable &&</div><div class="line"><a name="l05167"></a><span class="lineno"> 5167</span>  unique_expanded_constraint != -1) {</div><div class="line"><a name="l05168"></a><span class="lineno"> 5168</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(</div><div class="line"><a name="l05169"></a><span class="lineno"> 5169</span>  <span class="stringliteral">"objective: removed unique objective constraint."</span>);</div><div class="line"><a name="l05170"></a><span class="lineno"> 5170</span>  ConstraintProto* mutable_ct = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a9b3e1bc8b76ea7d2614fd7ec2b066039">mutable_constraints</a>(</div><div class="line"><a name="l05171"></a><span class="lineno"> 5171</span>  unique_expanded_constraint);</div><div class="line"><a name="l05172"></a><span class="lineno"> 5172</span>  *(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a4b3b9ef9c5f214dd4427daa2646eceda">mapping_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>()) = *mutable_ct;</div><div class="line"><a name="l05173"></a><span class="lineno"> 5173</span>  mutable_ct-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#aa0d2b6ddea7cb960b90423ac48f555bf">Clear</a>();</div><div class="line"><a name="l05174"></a><span class="lineno"> 5174</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a6939dc7b9db01cf3deff10405e260461">MarkVariableAsRemoved</a>(last_expanded_objective_var);</div><div class="line"><a name="l05175"></a><span class="lineno"> 5175</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab75a27c0aeda2de9c3957719b8196c36">UpdateConstraintVariableUsage</a>(unique_expanded_constraint);</div><div class="line"><a name="l05176"></a><span class="lineno"> 5176</span>  }</div><div class="line"><a name="l05177"></a><span class="lineno"> 5177</span> </div><div class="line"><a name="l05178"></a><span class="lineno"> 5178</span>  <span class="comment">// We re-do a canonicalization with the final linear expression.</span></div><div class="line"><a name="l05179"></a><span class="lineno"> 5179</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa62da782b2270ca293531a0aea153fba">CanonicalizeObjective</a>()) {</div><div class="line"><a name="l05180"></a><span class="lineno"> 5180</span>  (void)context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5aa53538ba8adaa0bea1c3c0727425b0">NotifyThatModelIsUnsat</a>();</div><div class="line"><a name="l05181"></a><span class="lineno"> 5181</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l05182"></a><span class="lineno"> 5182</span>  }</div><div class="line"><a name="l05183"></a><span class="lineno"> 5183</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a36794cf424ca2d69bc4774437a61a88e">WriteObjectiveToProto</a>();</div><div class="line"><a name="l05184"></a><span class="lineno"> 5184</span> }</div><div class="line"><a name="l05185"></a><span class="lineno"> 5185</span> </div><div class="line"><a name="l05186"></a><span class="lineno"> 5186</span> <span class="keywordtype">void</span> CpModelPresolver::MergeNoOverlapConstraints() {</div><div class="line"><a name="l05187"></a><span class="lineno"> 5187</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span>;</div><div class="line"><a name="l05188"></a><span class="lineno"> 5188</span> </div><div class="line"><a name="l05189"></a><span class="lineno"> 5189</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> num_constraints = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#aeaf0da781ca9b370d96b7fbd3f74266a">constraints_size</a>();</div><div class="line"><a name="l05190"></a><span class="lineno"> 5190</span>  <span class="keywordtype">int</span> old_num_no_overlaps = 0;</div><div class="line"><a name="l05191"></a><span class="lineno"> 5191</span>  <span class="keywordtype">int</span> old_num_intervals = 0;</div><div class="line"><a name="l05192"></a><span class="lineno"> 5192</span> </div><div class="line"><a name="l05193"></a><span class="lineno"> 5193</span>  <span class="comment">// Extract the no-overlap constraints.</span></div><div class="line"><a name="l05194"></a><span class="lineno"> 5194</span>  std::vector<int> disjunctive_index;</div><div class="line"><a name="l05195"></a><span class="lineno"> 5195</span>  std::vector<std::vector<Literal>> cliques;</div><div class="line"><a name="l05196"></a><span class="lineno"> 5196</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> c = 0; c < num_constraints; ++c) {</div><div class="line"><a name="l05197"></a><span class="lineno"> 5197</span>  <span class="keyword">const</span> ConstraintProto& <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a> = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#afce66afa8ae7776a449bba7313ea3559">constraints</a>(c);</div><div class="line"><a name="l05198"></a><span class="lineno"> 5198</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.constraint_case() != ConstraintProto::ConstraintCase::kNoOverlap) {</div><div class="line"><a name="l05199"></a><span class="lineno"> 5199</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l05200"></a><span class="lineno"> 5200</span>  }</div><div class="line"><a name="l05201"></a><span class="lineno"> 5201</span>  std::vector<Literal> clique;</div><div class="line"><a name="l05202"></a><span class="lineno"> 5202</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> i : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.no_overlap().intervals()) {</div><div class="line"><a name="l05203"></a><span class="lineno"> 5203</span>  clique.push_back(Literal(BooleanVariable(i), <span class="keyword">true</span>));</div><div class="line"><a name="l05204"></a><span class="lineno"> 5204</span>  }</div><div class="line"><a name="l05205"></a><span class="lineno"> 5205</span>  cliques.push_back(clique);</div><div class="line"><a name="l05206"></a><span class="lineno"> 5206</span>  disjunctive_index.push_back(c);</div><div class="line"><a name="l05207"></a><span class="lineno"> 5207</span> </div><div class="line"><a name="l05208"></a><span class="lineno"> 5208</span>  old_num_no_overlaps++;</div><div class="line"><a name="l05209"></a><span class="lineno"> 5209</span>  old_num_intervals += clique.size();</div><div class="line"><a name="l05210"></a><span class="lineno"> 5210</span>  }</div><div class="line"><a name="l05211"></a><span class="lineno"> 5211</span>  <span class="keywordflow">if</span> (old_num_no_overlaps == 0) <span class="keywordflow">return</span>;</div><div class="line"><a name="l05212"></a><span class="lineno"> 5212</span> </div><div class="line"><a name="l05213"></a><span class="lineno"> 5213</span>  <span class="comment">// We reuse the max-clique code from sat.</span></div><div class="line"><a name="l05214"></a><span class="lineno"> 5214</span>  Model local_model;</div><div class="line"><a name="l05215"></a><span class="lineno"> 5215</span>  local_model.GetOrCreate<Trail>()->Resize(num_constraints);</div><div class="line"><a name="l05216"></a><span class="lineno"> 5216</span>  <span class="keyword">auto</span>* graph = local_model.GetOrCreate<BinaryImplicationGraph>();</div><div class="line"><a name="l05217"></a><span class="lineno"> 5217</span>  graph->Resize(num_constraints);</div><div class="line"><a name="l05218"></a><span class="lineno"> 5218</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> std::vector<Literal>& clique : cliques) {</div><div class="line"><a name="l05219"></a><span class="lineno"> 5219</span>  <span class="comment">// All variables at false is always a valid solution of the local model,</span></div><div class="line"><a name="l05220"></a><span class="lineno"> 5220</span>  <span class="comment">// so this should never return UNSAT.</span></div><div class="line"><a name="l05221"></a><span class="lineno"> 5221</span>  <a class="code" href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a>(graph->AddAtMostOne(clique));</div><div class="line"><a name="l05222"></a><span class="lineno"> 5222</span>  }</div><div class="line"><a name="l05223"></a><span class="lineno"> 5223</span>  <a class="code" href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a>(graph->DetectEquivalences());</div><div class="line"><a name="l05224"></a><span class="lineno"> 5224</span>  graph->TransformIntoMaxCliques(</div><div class="line"><a name="l05225"></a><span class="lineno"> 5225</span>  &cliques, context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aaabb604ccac4a6136be93bfe64e2290d">params</a>().<a class="code" href="classoperations__research_1_1sat_1_1_sat_parameters.html#a046bea353442c96ae6aecffca7920bf8">merge_no_overlap_work_limit</a>());</div><div class="line"><a name="l05226"></a><span class="lineno"> 5226</span> </div><div class="line"><a name="l05227"></a><span class="lineno"> 5227</span>  <span class="comment">// Replace each no-overlap with an extended version, or remove if empty.</span></div><div class="line"><a name="l05228"></a><span class="lineno"> 5228</span>  <span class="keywordtype">int</span> new_num_no_overlaps = 0;</div><div class="line"><a name="l05229"></a><span class="lineno"> 5229</span>  <span class="keywordtype">int</span> new_num_intervals = 0;</div><div class="line"><a name="l05230"></a><span class="lineno"> 5230</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < cliques.size(); ++i) {</div><div class="line"><a name="l05231"></a><span class="lineno"> 5231</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> ct_index = disjunctive_index[i];</div><div class="line"><a name="l05232"></a><span class="lineno"> 5232</span>  ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a> =</div><div class="line"><a name="l05233"></a><span class="lineno"> 5233</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a9b3e1bc8b76ea7d2614fd7ec2b066039">mutable_constraints</a>(ct_index);</div><div class="line"><a name="l05234"></a><span class="lineno"> 5234</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->Clear();</div><div class="line"><a name="l05235"></a><span class="lineno"> 5235</span>  <span class="keywordflow">if</span> (cliques[i].empty()) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l05236"></a><span class="lineno"> 5236</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> Literal l : cliques[i]) {</div><div class="line"><a name="l05237"></a><span class="lineno"> 5237</span>  <a class="code" href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a>(l.IsPositive());</div><div class="line"><a name="l05238"></a><span class="lineno"> 5238</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_no_overlap()->add_intervals(l.Variable().value());</div><div class="line"><a name="l05239"></a><span class="lineno"> 5239</span>  }</div><div class="line"><a name="l05240"></a><span class="lineno"> 5240</span>  new_num_no_overlaps++;</div><div class="line"><a name="l05241"></a><span class="lineno"> 5241</span>  new_num_intervals += cliques[i].size();</div><div class="line"><a name="l05242"></a><span class="lineno"> 5242</span>  }</div><div class="line"><a name="l05243"></a><span class="lineno"> 5243</span>  <span class="keywordflow">if</span> (old_num_intervals != new_num_intervals ||</div><div class="line"><a name="l05244"></a><span class="lineno"> 5244</span>  old_num_no_overlaps != new_num_no_overlaps) {</div><div class="line"><a name="l05245"></a><span class="lineno"> 5245</span>  <a class="code" href="base_2logging_8h.html#afcaa7cadd41741bb855c2ada1d2ef927">VLOG</a>(1) << absl::StrCat(<span class="stringliteral">"Merged "</span>, old_num_no_overlaps, <span class="stringliteral">" no-overlaps ("</span>,</div><div class="line"><a name="l05246"></a><span class="lineno"> 5246</span>  old_num_intervals, <span class="stringliteral">" intervals) into "</span>,</div><div class="line"><a name="l05247"></a><span class="lineno"> 5247</span>  new_num_no_overlaps, <span class="stringliteral">" no-overlaps ("</span>,</div><div class="line"><a name="l05248"></a><span class="lineno"> 5248</span>  new_num_intervals, <span class="stringliteral">" intervals)."</span>);</div><div class="line"><a name="l05249"></a><span class="lineno"> 5249</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"no_overlap: merged constraints"</span>);</div><div class="line"><a name="l05250"></a><span class="lineno"> 5250</span>  }</div><div class="line"><a name="l05251"></a><span class="lineno"> 5251</span> }</div><div class="line"><a name="l05252"></a><span class="lineno"> 5252</span> </div><div class="line"><a name="l05253"></a><span class="lineno"> 5253</span> <span class="comment">// TODO(user): Should we take into account the exactly_one constraints? note</span></div><div class="line"><a name="l05254"></a><span class="lineno"> 5254</span> <span class="comment">// that such constraint cannot be extended. If if a literal implies two literals</span></div><div class="line"><a name="l05255"></a><span class="lineno"> 5255</span> <span class="comment">// at one inside an exactly one constraint then it must be false. Similarly if</span></div><div class="line"><a name="l05256"></a><span class="lineno"> 5256</span> <span class="comment">// it implies all literals at zero inside the exactly one.</span></div><div class="line"><a name="l05257"></a><span class="lineno"> 5257</span> <span class="keywordtype">void</span> CpModelPresolver::TransformIntoMaxCliques() {</div><div class="line"><a name="l05258"></a><span class="lineno"> 5258</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span>;</div><div class="line"><a name="l05259"></a><span class="lineno"> 5259</span> </div><div class="line"><a name="l05260"></a><span class="lineno"> 5260</span>  <span class="keyword">auto</span> convert = [](<span class="keywordtype">int</span> ref) {</div><div class="line"><a name="l05261"></a><span class="lineno"> 5261</span>  <span class="keywordflow">if</span> (<a class="code" href="namespaceoperations__research_1_1sat.html#a217338425de4389014563f1f24331713">RefIsPositive</a>(ref)) <span class="keywordflow">return</span> Literal(BooleanVariable(ref), <span class="keyword">true</span>);</div><div class="line"><a name="l05262"></a><span class="lineno"> 5262</span>  <span class="keywordflow">return</span> Literal(BooleanVariable(<a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(ref)), <span class="keyword">false</span>);</div><div class="line"><a name="l05263"></a><span class="lineno"> 5263</span>  };</div><div class="line"><a name="l05264"></a><span class="lineno"> 5264</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> num_constraints = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#aeaf0da781ca9b370d96b7fbd3f74266a">constraints_size</a>();</div><div class="line"><a name="l05265"></a><span class="lineno"> 5265</span> </div><div class="line"><a name="l05266"></a><span class="lineno"> 5266</span>  <span class="comment">// Extract the bool_and and at_most_one constraints.</span></div><div class="line"><a name="l05267"></a><span class="lineno"> 5267</span>  std::vector<std::vector<Literal>> cliques;</div><div class="line"><a name="l05268"></a><span class="lineno"> 5268</span> </div><div class="line"><a name="l05269"></a><span class="lineno"> 5269</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> c = 0; c < num_constraints; ++c) {</div><div class="line"><a name="l05270"></a><span class="lineno"> 5270</span>  ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a> = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a9b3e1bc8b76ea7d2614fd7ec2b066039">mutable_constraints</a>(c);</div><div class="line"><a name="l05271"></a><span class="lineno"> 5271</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->constraint_case() == ConstraintProto::ConstraintCase::kAtMostOne) {</div><div class="line"><a name="l05272"></a><span class="lineno"> 5272</span>  std::vector<Literal> clique;</div><div class="line"><a name="l05273"></a><span class="lineno"> 5273</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> ref : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->at_most_one().literals()) {</div><div class="line"><a name="l05274"></a><span class="lineno"> 5274</span>  clique.push_back(convert(ref));</div><div class="line"><a name="l05275"></a><span class="lineno"> 5275</span>  }</div><div class="line"><a name="l05276"></a><span class="lineno"> 5276</span>  cliques.push_back(clique);</div><div class="line"><a name="l05277"></a><span class="lineno"> 5277</span>  <span class="keywordflow">if</span> (RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) {</div><div class="line"><a name="l05278"></a><span class="lineno"> 5278</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab75a27c0aeda2de9c3957719b8196c36">UpdateConstraintVariableUsage</a>(c);</div><div class="line"><a name="l05279"></a><span class="lineno"> 5279</span>  }</div><div class="line"><a name="l05280"></a><span class="lineno"> 5280</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->constraint_case() ==</div><div class="line"><a name="l05281"></a><span class="lineno"> 5281</span>  ConstraintProto::ConstraintCase::kBoolAnd) {</div><div class="line"><a name="l05282"></a><span class="lineno"> 5282</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->enforcement_literal().size() != 1) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l05283"></a><span class="lineno"> 5283</span>  <span class="keyword">const</span> Literal enforcement = convert(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->enforcement_literal(0));</div><div class="line"><a name="l05284"></a><span class="lineno"> 5284</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> ref : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->bool_and().literals()) {</div><div class="line"><a name="l05285"></a><span class="lineno"> 5285</span>  <span class="keywordflow">if</span> (ref == <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->enforcement_literal(0)) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l05286"></a><span class="lineno"> 5286</span>  cliques.push_back({enforcement, convert(ref).Negated()});</div><div class="line"><a name="l05287"></a><span class="lineno"> 5287</span>  }</div><div class="line"><a name="l05288"></a><span class="lineno"> 5288</span>  <span class="keywordflow">if</span> (RemoveConstraint(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) {</div><div class="line"><a name="l05289"></a><span class="lineno"> 5289</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab75a27c0aeda2de9c3957719b8196c36">UpdateConstraintVariableUsage</a>(c);</div><div class="line"><a name="l05290"></a><span class="lineno"> 5290</span>  }</div><div class="line"><a name="l05291"></a><span class="lineno"> 5291</span>  }</div><div class="line"><a name="l05292"></a><span class="lineno"> 5292</span>  }</div><div class="line"><a name="l05293"></a><span class="lineno"> 5293</span> </div><div class="line"><a name="l05294"></a><span class="lineno"> 5294</span>  int64_t num_literals_before = 0;</div><div class="line"><a name="l05295"></a><span class="lineno"> 5295</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> num_old_cliques = cliques.size();</div><div class="line"><a name="l05296"></a><span class="lineno"> 5296</span> </div><div class="line"><a name="l05297"></a><span class="lineno"> 5297</span>  <span class="comment">// We reuse the max-clique code from sat.</span></div><div class="line"><a name="l05298"></a><span class="lineno"> 5298</span>  Model local_model;</div><div class="line"><a name="l05299"></a><span class="lineno"> 5299</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> num_variables = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a6a4544ca20489d70e302f5d6d374a012">variables</a>().size();</div><div class="line"><a name="l05300"></a><span class="lineno"> 5300</span>  local_model.GetOrCreate<Trail>()->Resize(num_variables);</div><div class="line"><a name="l05301"></a><span class="lineno"> 5301</span>  <span class="keyword">auto</span>* graph = local_model.GetOrCreate<BinaryImplicationGraph>();</div><div class="line"><a name="l05302"></a><span class="lineno"> 5302</span>  graph->Resize(num_variables);</div><div class="line"><a name="l05303"></a><span class="lineno"> 5303</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> std::vector<Literal>& clique : cliques) {</div><div class="line"><a name="l05304"></a><span class="lineno"> 5304</span>  num_literals_before += clique.size();</div><div class="line"><a name="l05305"></a><span class="lineno"> 5305</span>  <span class="keywordflow">if</span> (!graph->AddAtMostOne(clique)) {</div><div class="line"><a name="l05306"></a><span class="lineno"> 5306</span>  <span class="keywordflow">return</span> (<span class="keywordtype">void</span>)context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5aa53538ba8adaa0bea1c3c0727425b0">NotifyThatModelIsUnsat</a>();</div><div class="line"><a name="l05307"></a><span class="lineno"> 5307</span>  }</div><div class="line"><a name="l05308"></a><span class="lineno"> 5308</span>  }</div><div class="line"><a name="l05309"></a><span class="lineno"> 5309</span>  <span class="keywordflow">if</span> (!graph->DetectEquivalences()) {</div><div class="line"><a name="l05310"></a><span class="lineno"> 5310</span>  <span class="keywordflow">return</span> (<span class="keywordtype">void</span>)context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5aa53538ba8adaa0bea1c3c0727425b0">NotifyThatModelIsUnsat</a>();</div><div class="line"><a name="l05311"></a><span class="lineno"> 5311</span>  }</div><div class="line"><a name="l05312"></a><span class="lineno"> 5312</span>  graph->TransformIntoMaxCliques(</div><div class="line"><a name="l05313"></a><span class="lineno"> 5313</span>  &cliques, context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aaabb604ccac4a6136be93bfe64e2290d">params</a>().<a class="code" href="classoperations__research_1_1sat_1_1_sat_parameters.html#a7c134ee6c0afa8afbeadedc61e98ac15">merge_at_most_one_work_limit</a>());</div><div class="line"><a name="l05314"></a><span class="lineno"> 5314</span> </div><div class="line"><a name="l05315"></a><span class="lineno"> 5315</span>  <span class="comment">// Add the Boolean variable equivalence detected by DetectEquivalences().</span></div><div class="line"><a name="l05316"></a><span class="lineno"> 5316</span>  <span class="comment">// Those are needed because TransformIntoMaxCliques() will replace all</span></div><div class="line"><a name="l05317"></a><span class="lineno"> 5317</span>  <span class="comment">// variable by its representative.</span></div><div class="line"><a name="l05318"></a><span class="lineno"> 5318</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = 0; <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> < num_variables; ++<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) {</div><div class="line"><a name="l05319"></a><span class="lineno"> 5319</span>  <span class="keyword">const</span> Literal l = Literal(BooleanVariable(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>), <span class="keyword">true</span>);</div><div class="line"><a name="l05320"></a><span class="lineno"> 5320</span>  <span class="keywordflow">if</span> (graph->RepresentativeOf(l) != l) {</div><div class="line"><a name="l05321"></a><span class="lineno"> 5321</span>  <span class="keyword">const</span> Literal r = graph->RepresentativeOf(l);</div><div class="line"><a name="l05322"></a><span class="lineno"> 5322</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a8fc1d49d1e1bf7261f15ccc6c23c4b10">StoreBooleanEqualityRelation</a>(</div><div class="line"><a name="l05323"></a><span class="lineno"> 5323</span>  <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>, r.IsPositive() ? r.Variable().value()</div><div class="line"><a name="l05324"></a><span class="lineno"> 5324</span>  : <a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(r.Variable().value()));</div><div class="line"><a name="l05325"></a><span class="lineno"> 5325</span>  }</div><div class="line"><a name="l05326"></a><span class="lineno"> 5326</span>  }</div><div class="line"><a name="l05327"></a><span class="lineno"> 5327</span> </div><div class="line"><a name="l05328"></a><span class="lineno"> 5328</span>  <span class="keywordtype">int</span> num_new_cliques = 0;</div><div class="line"><a name="l05329"></a><span class="lineno"> 5329</span>  int64_t num_literals_after = 0;</div><div class="line"><a name="l05330"></a><span class="lineno"> 5330</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> std::vector<Literal>& clique : cliques) {</div><div class="line"><a name="l05331"></a><span class="lineno"> 5331</span>  <span class="keywordflow">if</span> (clique.empty()) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l05332"></a><span class="lineno"> 5332</span>  num_new_cliques++;</div><div class="line"><a name="l05333"></a><span class="lineno"> 5333</span>  num_literals_after += clique.size();</div><div class="line"><a name="l05334"></a><span class="lineno"> 5334</span>  ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a> = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>();</div><div class="line"><a name="l05335"></a><span class="lineno"> 5335</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> Literal <a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a> : clique) {</div><div class="line"><a name="l05336"></a><span class="lineno"> 5336</span>  <span class="keywordflow">if</span> (<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>.IsPositive()) {</div><div class="line"><a name="l05337"></a><span class="lineno"> 5337</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_at_most_one()->add_literals(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>.Variable().value());</div><div class="line"><a name="l05338"></a><span class="lineno"> 5338</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l05339"></a><span class="lineno"> 5339</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_at_most_one()->add_literals(</div><div class="line"><a name="l05340"></a><span class="lineno"> 5340</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>.Variable().value()));</div><div class="line"><a name="l05341"></a><span class="lineno"> 5341</span>  }</div><div class="line"><a name="l05342"></a><span class="lineno"> 5342</span>  }</div><div class="line"><a name="l05343"></a><span class="lineno"> 5343</span> </div><div class="line"><a name="l05344"></a><span class="lineno"> 5344</span>  <span class="comment">// Make sure we do not have duplicate variable reference.</span></div><div class="line"><a name="l05345"></a><span class="lineno"> 5345</span>  PresolveAtMostOne(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l05346"></a><span class="lineno"> 5346</span>  }</div><div class="line"><a name="l05347"></a><span class="lineno"> 5347</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l05348"></a><span class="lineno"> 5348</span>  <span class="keywordflow">if</span> (num_new_cliques != num_old_cliques) {</div><div class="line"><a name="l05349"></a><span class="lineno"> 5349</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"at_most_one: transformed into max clique."</span>);</div><div class="line"><a name="l05350"></a><span class="lineno"> 5350</span>  }</div><div class="line"><a name="l05351"></a><span class="lineno"> 5351</span> </div><div class="line"><a name="l05352"></a><span class="lineno"> 5352</span>  <span class="keywordflow">if</span> (num_old_cliques != num_new_cliques ||</div><div class="line"><a name="l05353"></a><span class="lineno"> 5353</span>  num_literals_before != num_literals_after) {</div><div class="line"><a name="l05354"></a><span class="lineno"> 5354</span>  <a class="code" href="util_2logging_8h.html#a5f67b653dd99ddbe5e3367e3b4b7b532">SOLVER_LOG</a>(logger_, <span class="stringliteral">"[MaxClique] Merged "</span>, num_old_cliques, <span class="stringliteral">"("</span>,</div><div class="line"><a name="l05355"></a><span class="lineno"> 5355</span>  num_literals_before, <span class="stringliteral">" literals) into "</span>, num_new_cliques, <span class="stringliteral">"("</span>,</div><div class="line"><a name="l05356"></a><span class="lineno"> 5356</span>  num_literals_after, <span class="stringliteral">" literals) at_most_ones."</span>);</div><div class="line"><a name="l05357"></a><span class="lineno"> 5357</span>  }</div><div class="line"><a name="l05358"></a><span class="lineno"> 5358</span> }</div><div class="line"><a name="l05359"></a><span class="lineno"> 5359</span> </div><div class="line"><a name="l05360"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_cp_model_presolver.html#ab37522044009144ac6eff3b3d4c1d271"> 5360</a></span> <span class="keywordtype">bool</span> <a class="code" href="classoperations__research_1_1sat_1_1_cp_model_presolver.html#ab37522044009144ac6eff3b3d4c1d271">CpModelPresolver::PresolveOneConstraint</a>(<span class="keywordtype">int</span> c) {</div><div class="line"><a name="l05361"></a><span class="lineno"> 5361</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l05362"></a><span class="lineno"> 5362</span>  <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html">ConstraintProto</a>* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a> = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a9b3e1bc8b76ea7d2614fd7ec2b066039">mutable_constraints</a>(c);</div><div class="line"><a name="l05363"></a><span class="lineno"> 5363</span> </div><div class="line"><a name="l05364"></a><span class="lineno"> 5364</span>  <span class="comment">// Generic presolve to exploit variable/literal equivalence.</span></div><div class="line"><a name="l05365"></a><span class="lineno"> 5365</span>  <span class="keywordflow">if</span> (ExploitEquivalenceRelations(c, <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) {</div><div class="line"><a name="l05366"></a><span class="lineno"> 5366</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab75a27c0aeda2de9c3957719b8196c36">UpdateConstraintVariableUsage</a>(c);</div><div class="line"><a name="l05367"></a><span class="lineno"> 5367</span>  }</div><div class="line"><a name="l05368"></a><span class="lineno"> 5368</span> </div><div class="line"><a name="l05369"></a><span class="lineno"> 5369</span>  <span class="comment">// Generic presolve for reified constraint.</span></div><div class="line"><a name="l05370"></a><span class="lineno"> 5370</span>  <span class="keywordflow">if</span> (PresolveEnforcementLiteral(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) {</div><div class="line"><a name="l05371"></a><span class="lineno"> 5371</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab75a27c0aeda2de9c3957719b8196c36">UpdateConstraintVariableUsage</a>(c);</div><div class="line"><a name="l05372"></a><span class="lineno"> 5372</span>  }</div><div class="line"><a name="l05373"></a><span class="lineno"> 5373</span> </div><div class="line"><a name="l05374"></a><span class="lineno"> 5374</span>  <span class="comment">// Call the presolve function for this constraint if any.</span></div><div class="line"><a name="l05375"></a><span class="lineno"> 5375</span>  <span class="keywordflow">switch</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->constraint_case()) {</div><div class="line"><a name="l05376"></a><span class="lineno"> 5376</span>  <span class="keywordflow">case</span> ConstraintProto::ConstraintCase::kBoolOr:</div><div class="line"><a name="l05377"></a><span class="lineno"> 5377</span>  <span class="keywordflow">return</span> PresolveBoolOr(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l05378"></a><span class="lineno"> 5378</span>  <span class="keywordflow">case</span> ConstraintProto::ConstraintCase::kBoolAnd:</div><div class="line"><a name="l05379"></a><span class="lineno"> 5379</span>  <span class="keywordflow">return</span> PresolveBoolAnd(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l05380"></a><span class="lineno"> 5380</span>  <span class="keywordflow">case</span> ConstraintProto::ConstraintCase::kAtMostOne:</div><div class="line"><a name="l05381"></a><span class="lineno"> 5381</span>  <span class="keywordflow">return</span> PresolveAtMostOne(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l05382"></a><span class="lineno"> 5382</span>  <span class="keywordflow">case</span> ConstraintProto::ConstraintCase::kExactlyOne:</div><div class="line"><a name="l05383"></a><span class="lineno"> 5383</span>  <span class="keywordflow">return</span> PresolveExactlyOne(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l05384"></a><span class="lineno"> 5384</span>  <span class="keywordflow">case</span> ConstraintProto::ConstraintCase::kBoolXor:</div><div class="line"><a name="l05385"></a><span class="lineno"> 5385</span>  <span class="keywordflow">return</span> PresolveBoolXor(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l05386"></a><span class="lineno"> 5386</span>  <span class="keywordflow">case</span> ConstraintProto::ConstraintCase::kIntMax:</div><div class="line"><a name="l05387"></a><span class="lineno"> 5387</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_max().vars_size() == 2 &&</div><div class="line"><a name="l05388"></a><span class="lineno"> 5388</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_max().vars(0)) == <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->int_max().vars(1)) {</div><div class="line"><a name="l05389"></a><span class="lineno"> 5389</span>  <span class="keywordflow">return</span> PresolveIntAbs(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l05390"></a><span class="lineno"> 5390</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l05391"></a><span class="lineno"> 5391</span>  <span class="keywordflow">return</span> PresolveIntMax(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l05392"></a><span class="lineno"> 5392</span>  }</div><div class="line"><a name="l05393"></a><span class="lineno"> 5393</span>  <span class="keywordflow">case</span> ConstraintProto::ConstraintCase::kIntMin:</div><div class="line"><a name="l05394"></a><span class="lineno"> 5394</span>  <span class="keywordflow">return</span> PresolveIntMin(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l05395"></a><span class="lineno"> 5395</span>  <span class="keywordflow">case</span> ConstraintProto::ConstraintCase::kLinMax:</div><div class="line"><a name="l05396"></a><span class="lineno"> 5396</span>  <span class="keywordflow">return</span> PresolveLinMax(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l05397"></a><span class="lineno"> 5397</span>  <span class="keywordflow">case</span> ConstraintProto::ConstraintCase::kLinMin:</div><div class="line"><a name="l05398"></a><span class="lineno"> 5398</span>  <span class="keywordflow">return</span> PresolveLinMin(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l05399"></a><span class="lineno"> 5399</span>  <span class="keywordflow">case</span> ConstraintProto::ConstraintCase::kIntProd:</div><div class="line"><a name="l05400"></a><span class="lineno"> 5400</span>  <span class="keywordflow">return</span> PresolveIntProd(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l05401"></a><span class="lineno"> 5401</span>  <span class="keywordflow">case</span> ConstraintProto::ConstraintCase::kIntDiv:</div><div class="line"><a name="l05402"></a><span class="lineno"> 5402</span>  <span class="keywordflow">return</span> PresolveIntDiv(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l05403"></a><span class="lineno"> 5403</span>  <span class="keywordflow">case</span> ConstraintProto::ConstraintCase::kIntMod:</div><div class="line"><a name="l05404"></a><span class="lineno"> 5404</span>  <span class="keywordflow">return</span> PresolveIntMod(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l05405"></a><span class="lineno"> 5405</span>  <span class="keywordflow">case</span> ConstraintProto::ConstraintCase::kLinear: {</div><div class="line"><a name="l05406"></a><span class="lineno"> 5406</span>  <span class="comment">// In the presence of affine relation, it is possible that the sign of a</span></div><div class="line"><a name="l05407"></a><span class="lineno"> 5407</span>  <span class="comment">// variable change during canonicalization, and a variable that could</span></div><div class="line"><a name="l05408"></a><span class="lineno"> 5408</span>  <span class="comment">// freely move in one direction can no longer do so. So we make sure we</span></div><div class="line"><a name="l05409"></a><span class="lineno"> 5409</span>  <span class="comment">// always remove c from all the maps before re-inserting it in</span></div><div class="line"><a name="l05410"></a><span class="lineno"> 5410</span>  <span class="comment">// PropagateDomainsInLinear().</span></div><div class="line"><a name="l05411"></a><span class="lineno"> 5411</span>  <span class="comment">//</span></div><div class="line"><a name="l05412"></a><span class="lineno"> 5412</span>  <span class="comment">// TODO(user): The move in only one direction code is redundant with the</span></div><div class="line"><a name="l05413"></a><span class="lineno"> 5413</span>  <span class="comment">// dual bound strengthening code. So maybe we don't need both. Especially</span></div><div class="line"><a name="l05414"></a><span class="lineno"> 5414</span>  <span class="comment">// since the implementation here is a bit hacky.</span></div><div class="line"><a name="l05415"></a><span class="lineno"> 5415</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> ref : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().vars()) {</div><div class="line"><a name="l05416"></a><span class="lineno"> 5416</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = <a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(ref);</div><div class="line"><a name="l05417"></a><span class="lineno"> 5417</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a23aa815e8a7a860998c4d35760fa087e">var_to_lb_only_constraints</a>[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>].erase(c);</div><div class="line"><a name="l05418"></a><span class="lineno"> 5418</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a47714f887512a3d7acebfcb4a348291a">var_to_ub_only_constraints</a>[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>].erase(c);</div><div class="line"><a name="l05419"></a><span class="lineno"> 5419</span>  }</div><div class="line"><a name="l05420"></a><span class="lineno"> 5420</span>  <span class="keywordflow">if</span> (CanonicalizeLinear(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) {</div><div class="line"><a name="l05421"></a><span class="lineno"> 5421</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab75a27c0aeda2de9c3957719b8196c36">UpdateConstraintVariableUsage</a>(c);</div><div class="line"><a name="l05422"></a><span class="lineno"> 5422</span>  }</div><div class="line"><a name="l05423"></a><span class="lineno"> 5423</span>  <span class="keywordflow">if</span> (PresolveSmallLinear(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) {</div><div class="line"><a name="l05424"></a><span class="lineno"> 5424</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab75a27c0aeda2de9c3957719b8196c36">UpdateConstraintVariableUsage</a>(c);</div><div class="line"><a name="l05425"></a><span class="lineno"> 5425</span>  }</div><div class="line"><a name="l05426"></a><span class="lineno"> 5426</span>  <span class="keywordflow">if</span> (PropagateDomainsInLinear(c, <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) {</div><div class="line"><a name="l05427"></a><span class="lineno"> 5427</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab75a27c0aeda2de9c3957719b8196c36">UpdateConstraintVariableUsage</a>(c);</div><div class="line"><a name="l05428"></a><span class="lineno"> 5428</span>  }</div><div class="line"><a name="l05429"></a><span class="lineno"> 5429</span>  <span class="keywordflow">if</span> (PresolveSmallLinear(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) {</div><div class="line"><a name="l05430"></a><span class="lineno"> 5430</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab75a27c0aeda2de9c3957719b8196c36">UpdateConstraintVariableUsage</a>(c);</div><div class="line"><a name="l05431"></a><span class="lineno"> 5431</span>  }</div><div class="line"><a name="l05432"></a><span class="lineno"> 5432</span>  <span class="comment">// We first propagate the domains before calling this presolve rule.</span></div><div class="line"><a name="l05433"></a><span class="lineno"> 5433</span>  <span class="keywordflow">if</span> (RemoveSingletonInLinear(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) {</div><div class="line"><a name="l05434"></a><span class="lineno"> 5434</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab75a27c0aeda2de9c3957719b8196c36">UpdateConstraintVariableUsage</a>(c);</div><div class="line"><a name="l05435"></a><span class="lineno"> 5435</span> </div><div class="line"><a name="l05436"></a><span class="lineno"> 5436</span>  <span class="comment">// There is no need to re-do a propagation here, but the constraint</span></div><div class="line"><a name="l05437"></a><span class="lineno"> 5437</span>  <span class="comment">// size might have been reduced.</span></div><div class="line"><a name="l05438"></a><span class="lineno"> 5438</span>  <span class="keywordflow">if</span> (PresolveSmallLinear(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) {</div><div class="line"><a name="l05439"></a><span class="lineno"> 5439</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab75a27c0aeda2de9c3957719b8196c36">UpdateConstraintVariableUsage</a>(c);</div><div class="line"><a name="l05440"></a><span class="lineno"> 5440</span>  }</div><div class="line"><a name="l05441"></a><span class="lineno"> 5441</span>  }</div><div class="line"><a name="l05442"></a><span class="lineno"> 5442</span>  <span class="keywordflow">if</span> (PresolveLinearOnBooleans(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) {</div><div class="line"><a name="l05443"></a><span class="lineno"> 5443</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab75a27c0aeda2de9c3957719b8196c36">UpdateConstraintVariableUsage</a>(c);</div><div class="line"><a name="l05444"></a><span class="lineno"> 5444</span>  }</div><div class="line"><a name="l05445"></a><span class="lineno"> 5445</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->constraint_case() == ConstraintProto::ConstraintCase::kLinear) {</div><div class="line"><a name="l05446"></a><span class="lineno"> 5446</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> old_num_enforcement_literals = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->enforcement_literal_size();</div><div class="line"><a name="l05447"></a><span class="lineno"> 5447</span>  ExtractEnforcementLiteralFromLinearConstraint(c, <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l05448"></a><span class="lineno"> 5448</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->constraint_case() ==</div><div class="line"><a name="l05449"></a><span class="lineno"> 5449</span>  ConstraintProto::ConstraintCase::CONSTRAINT_NOT_SET) {</div><div class="line"><a name="l05450"></a><span class="lineno"> 5450</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab75a27c0aeda2de9c3957719b8196c36">UpdateConstraintVariableUsage</a>(c);</div><div class="line"><a name="l05451"></a><span class="lineno"> 5451</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l05452"></a><span class="lineno"> 5452</span>  }</div><div class="line"><a name="l05453"></a><span class="lineno"> 5453</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->enforcement_literal_size() > old_num_enforcement_literals &&</div><div class="line"><a name="l05454"></a><span class="lineno"> 5454</span>  PresolveSmallLinear(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) {</div><div class="line"><a name="l05455"></a><span class="lineno"> 5455</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab75a27c0aeda2de9c3957719b8196c36">UpdateConstraintVariableUsage</a>(c);</div><div class="line"><a name="l05456"></a><span class="lineno"> 5456</span>  }</div><div class="line"><a name="l05457"></a><span class="lineno"> 5457</span>  PresolveLinearEqualityModuloTwo(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l05458"></a><span class="lineno"> 5458</span>  }</div><div class="line"><a name="l05459"></a><span class="lineno"> 5459</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l05460"></a><span class="lineno"> 5460</span>  }</div><div class="line"><a name="l05461"></a><span class="lineno"> 5461</span>  <span class="keywordflow">case</span> ConstraintProto::ConstraintCase::kInterval:</div><div class="line"><a name="l05462"></a><span class="lineno"> 5462</span>  <span class="keywordflow">return</span> PresolveInterval(c, <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l05463"></a><span class="lineno"> 5463</span>  <span class="keywordflow">case</span> ConstraintProto::ConstraintCase::kInverse:</div><div class="line"><a name="l05464"></a><span class="lineno"> 5464</span>  <span class="keywordflow">return</span> PresolveInverse(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l05465"></a><span class="lineno"> 5465</span>  <span class="keywordflow">case</span> ConstraintProto::ConstraintCase::kElement:</div><div class="line"><a name="l05466"></a><span class="lineno"> 5466</span>  <span class="keywordflow">return</span> PresolveElement(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l05467"></a><span class="lineno"> 5467</span>  <span class="keywordflow">case</span> ConstraintProto::ConstraintCase::kTable:</div><div class="line"><a name="l05468"></a><span class="lineno"> 5468</span>  <span class="keywordflow">return</span> PresolveTable(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l05469"></a><span class="lineno"> 5469</span>  <span class="keywordflow">case</span> ConstraintProto::ConstraintCase::kAllDiff:</div><div class="line"><a name="l05470"></a><span class="lineno"> 5470</span>  <span class="keywordflow">return</span> PresolveAllDiff(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l05471"></a><span class="lineno"> 5471</span>  <span class="keywordflow">case</span> ConstraintProto::ConstraintCase::kNoOverlap:</div><div class="line"><a name="l05472"></a><span class="lineno"> 5472</span>  <span class="keywordflow">return</span> PresolveNoOverlap(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l05473"></a><span class="lineno"> 5473</span>  <span class="keywordflow">case</span> ConstraintProto::ConstraintCase::kNoOverlap2D:</div><div class="line"><a name="l05474"></a><span class="lineno"> 5474</span>  <span class="keywordflow">return</span> PresolveNoOverlap2D(c, <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l05475"></a><span class="lineno"> 5475</span>  <span class="keywordflow">case</span> ConstraintProto::ConstraintCase::kCumulative:</div><div class="line"><a name="l05476"></a><span class="lineno"> 5476</span>  <span class="keywordflow">return</span> PresolveCumulative(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l05477"></a><span class="lineno"> 5477</span>  <span class="keywordflow">case</span> ConstraintProto::ConstraintCase::kCircuit:</div><div class="line"><a name="l05478"></a><span class="lineno"> 5478</span>  <span class="keywordflow">return</span> PresolveCircuit(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l05479"></a><span class="lineno"> 5479</span>  <span class="keywordflow">case</span> ConstraintProto::ConstraintCase::kRoutes:</div><div class="line"><a name="l05480"></a><span class="lineno"> 5480</span>  <span class="keywordflow">return</span> PresolveRoutes(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l05481"></a><span class="lineno"> 5481</span>  <span class="keywordflow">case</span> ConstraintProto::ConstraintCase::kAutomaton:</div><div class="line"><a name="l05482"></a><span class="lineno"> 5482</span>  <span class="keywordflow">return</span> PresolveAutomaton(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l05483"></a><span class="lineno"> 5483</span>  <span class="keywordflow">case</span> ConstraintProto::ConstraintCase::kReservoir:</div><div class="line"><a name="l05484"></a><span class="lineno"> 5484</span>  <span class="keywordflow">return</span> PresolveReservoir(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l05485"></a><span class="lineno"> 5485</span>  <span class="keywordflow">default</span>:</div><div class="line"><a name="l05486"></a><span class="lineno"> 5486</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l05487"></a><span class="lineno"> 5487</span>  }</div><div class="line"><a name="l05488"></a><span class="lineno"> 5488</span> }</div><div class="line"><a name="l05489"></a><span class="lineno"> 5489</span> </div><div class="line"><a name="l05490"></a><span class="lineno"> 5490</span> <span class="comment">// This is called with constraint c1 whose literals are included in the literals</span></div><div class="line"><a name="l05491"></a><span class="lineno"> 5491</span> <span class="comment">// of c2.</span></div><div class="line"><a name="l05492"></a><span class="lineno"> 5492</span> <span class="comment">//</span></div><div class="line"><a name="l05493"></a><span class="lineno"> 5493</span> <span class="comment">// Returns false iff the model is UNSAT.</span></div><div class="line"><a name="l05494"></a><span class="lineno"> 5494</span> <span class="keywordtype">bool</span> CpModelPresolver::ProcessSetPPCSubset(</div><div class="line"><a name="l05495"></a><span class="lineno"> 5495</span>  <span class="keywordtype">int</span> c1, <span class="keywordtype">int</span> c2, <span class="keyword">const</span> std::vector<int>& c2_minus_c1,</div><div class="line"><a name="l05496"></a><span class="lineno"> 5496</span>  <span class="keyword">const</span> std::vector<int>& original_constraint_index,</div><div class="line"><a name="l05497"></a><span class="lineno"> 5497</span>  std::vector<bool>* marked_for_removal) {</div><div class="line"><a name="l05498"></a><span class="lineno"> 5498</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l05499"></a><span class="lineno"> 5499</span> </div><div class="line"><a name="l05500"></a><span class="lineno"> 5500</span>  <a class="code" href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a>(!(*marked_for_removal)[c1]);</div><div class="line"><a name="l05501"></a><span class="lineno"> 5501</span>  <a class="code" href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a>(!(*marked_for_removal)[c2]);</div><div class="line"><a name="l05502"></a><span class="lineno"> 5502</span> </div><div class="line"><a name="l05503"></a><span class="lineno"> 5503</span>  <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html">ConstraintProto</a>* ct1 = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a9b3e1bc8b76ea7d2614fd7ec2b066039">mutable_constraints</a>(</div><div class="line"><a name="l05504"></a><span class="lineno"> 5504</span>  original_constraint_index[c1]);</div><div class="line"><a name="l05505"></a><span class="lineno"> 5505</span>  <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html">ConstraintProto</a>* ct2 = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a9b3e1bc8b76ea7d2614fd7ec2b066039">mutable_constraints</a>(</div><div class="line"><a name="l05506"></a><span class="lineno"> 5506</span>  original_constraint_index[c2]);</div><div class="line"><a name="l05507"></a><span class="lineno"> 5507</span> </div><div class="line"><a name="l05508"></a><span class="lineno"> 5508</span>  <span class="keywordflow">if</span> ((ct1-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a5f9869899e2c94786f9709684f1ecc56">constraint_case</a>() == <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35aaadb0c3370c597095e0cb7e768f04567">ConstraintProto::kBoolOr</a> ||</div><div class="line"><a name="l05509"></a><span class="lineno"> 5509</span>  ct1-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a5f9869899e2c94786f9709684f1ecc56">constraint_case</a>() == <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35ad60570d9bed938f8b11385a7ba7f3508">ConstraintProto::kExactlyOne</a>) &&</div><div class="line"><a name="l05510"></a><span class="lineno"> 5510</span>  (ct2-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a5f9869899e2c94786f9709684f1ecc56">constraint_case</a>() == <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35a60d782b0aafa6f70b6230ffd970b2c6b">ConstraintProto::kAtMostOne</a> ||</div><div class="line"><a name="l05511"></a><span class="lineno"> 5511</span>  ct2-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a5f9869899e2c94786f9709684f1ecc56">constraint_case</a>() == <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35ad60570d9bed938f8b11385a7ba7f3508">ConstraintProto::kExactlyOne</a>)) {</div><div class="line"><a name="l05512"></a><span class="lineno"> 5512</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"setppc: bool_or in at_most_one."</span>);</div><div class="line"><a name="l05513"></a><span class="lineno"> 5513</span> </div><div class="line"><a name="l05514"></a><span class="lineno"> 5514</span>  <span class="comment">// Fix extras in c2 to 0, note that these will be removed from the</span></div><div class="line"><a name="l05515"></a><span class="lineno"> 5515</span>  <span class="comment">// constraint later.</span></div><div class="line"><a name="l05516"></a><span class="lineno"> 5516</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a> : c2_minus_c1) {</div><div class="line"><a name="l05517"></a><span class="lineno"> 5517</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ad0d1a630c07ba2321cf43d97a425bc30">SetLiteralToFalse</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>)) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l05518"></a><span class="lineno"> 5518</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"setppc: fixed variables"</span>);</div><div class="line"><a name="l05519"></a><span class="lineno"> 5519</span>  }</div><div class="line"><a name="l05520"></a><span class="lineno"> 5520</span> </div><div class="line"><a name="l05521"></a><span class="lineno"> 5521</span>  <span class="comment">// Change c2 to exactly_one if not already.</span></div><div class="line"><a name="l05522"></a><span class="lineno"> 5522</span>  <span class="keywordflow">if</span> (ct2-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a5f9869899e2c94786f9709684f1ecc56">constraint_case</a>() != <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35ad60570d9bed938f8b11385a7ba7f3508">ConstraintProto::kExactlyOne</a>) {</div><div class="line"><a name="l05523"></a><span class="lineno"> 5523</span>  ConstraintProto copy = *ct2;</div><div class="line"><a name="l05524"></a><span class="lineno"> 5524</span>  (*ct2-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ad5eff2987f39d596a4d7371961a92d42">mutable_exactly_one</a>()-><a class="code" href="classoperations__research_1_1sat_1_1_bool_argument_proto.html#a7e9ec85488cc2f768942885d54b2df8c">mutable_literals</a>()) =</div><div class="line"><a name="l05525"></a><span class="lineno"> 5525</span>  copy.<a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a02bdc7cff2f71612490c7f50d1b3bd13">at_most_one</a>().<a class="code" href="classoperations__research_1_1sat_1_1_bool_argument_proto.html#ae257a6514082fdcf3a9f33dda44c40b7">literals</a>();</div><div class="line"><a name="l05526"></a><span class="lineno"> 5526</span>  }</div><div class="line"><a name="l05527"></a><span class="lineno"> 5527</span> </div><div class="line"><a name="l05528"></a><span class="lineno"> 5528</span>  <span class="comment">// Remove c1.</span></div><div class="line"><a name="l05529"></a><span class="lineno"> 5529</span>  (*marked_for_removal)[c1] = <span class="keyword">true</span>;</div><div class="line"><a name="l05530"></a><span class="lineno"> 5530</span>  ct1-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#aa0d2b6ddea7cb960b90423ac48f555bf">Clear</a>();</div><div class="line"><a name="l05531"></a><span class="lineno"> 5531</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab75a27c0aeda2de9c3957719b8196c36">UpdateConstraintVariableUsage</a>(original_constraint_index[c1]);</div><div class="line"><a name="l05532"></a><span class="lineno"> 5532</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l05533"></a><span class="lineno"> 5533</span>  }</div><div class="line"><a name="l05534"></a><span class="lineno"> 5534</span> </div><div class="line"><a name="l05535"></a><span class="lineno"> 5535</span>  <span class="keywordflow">if</span> ((ct1-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a5f9869899e2c94786f9709684f1ecc56">constraint_case</a>() == <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35aaadb0c3370c597095e0cb7e768f04567">ConstraintProto::kBoolOr</a> ||</div><div class="line"><a name="l05536"></a><span class="lineno"> 5536</span>  ct1-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a5f9869899e2c94786f9709684f1ecc56">constraint_case</a>() == <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35ad60570d9bed938f8b11385a7ba7f3508">ConstraintProto::kExactlyOne</a>) &&</div><div class="line"><a name="l05537"></a><span class="lineno"> 5537</span>  ct2-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a5f9869899e2c94786f9709684f1ecc56">constraint_case</a>() == <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35aaadb0c3370c597095e0cb7e768f04567">ConstraintProto::kBoolOr</a>) {</div><div class="line"><a name="l05538"></a><span class="lineno"> 5538</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"setppc: removed dominated constraints"</span>);</div><div class="line"><a name="l05539"></a><span class="lineno"> 5539</span> </div><div class="line"><a name="l05540"></a><span class="lineno"> 5540</span>  (*marked_for_removal)[c2] = <span class="keyword">true</span>;</div><div class="line"><a name="l05541"></a><span class="lineno"> 5541</span>  ct2-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#aa0d2b6ddea7cb960b90423ac48f555bf">Clear</a>();</div><div class="line"><a name="l05542"></a><span class="lineno"> 5542</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab75a27c0aeda2de9c3957719b8196c36">UpdateConstraintVariableUsage</a>(original_constraint_index[c2]);</div><div class="line"><a name="l05543"></a><span class="lineno"> 5543</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l05544"></a><span class="lineno"> 5544</span>  }</div><div class="line"><a name="l05545"></a><span class="lineno"> 5545</span> </div><div class="line"><a name="l05546"></a><span class="lineno"> 5546</span>  <span class="keywordflow">if</span> (ct1-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a5f9869899e2c94786f9709684f1ecc56">constraint_case</a>() == <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35a60d782b0aafa6f70b6230ffd970b2c6b">ConstraintProto::kAtMostOne</a> &&</div><div class="line"><a name="l05547"></a><span class="lineno"> 5547</span>  (ct2-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a5f9869899e2c94786f9709684f1ecc56">constraint_case</a>() == <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35a60d782b0aafa6f70b6230ffd970b2c6b">ConstraintProto::kAtMostOne</a> ||</div><div class="line"><a name="l05548"></a><span class="lineno"> 5548</span>  ct2-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a5f9869899e2c94786f9709684f1ecc56">constraint_case</a>() == <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35ad60570d9bed938f8b11385a7ba7f3508">ConstraintProto::kExactlyOne</a>)) {</div><div class="line"><a name="l05549"></a><span class="lineno"> 5549</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"setppc: removed dominated constraints"</span>);</div><div class="line"><a name="l05550"></a><span class="lineno"> 5550</span>  (*marked_for_removal)[c1] = <span class="keyword">true</span>;</div><div class="line"><a name="l05551"></a><span class="lineno"> 5551</span>  ct1-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#aa0d2b6ddea7cb960b90423ac48f555bf">Clear</a>();</div><div class="line"><a name="l05552"></a><span class="lineno"> 5552</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab75a27c0aeda2de9c3957719b8196c36">UpdateConstraintVariableUsage</a>(original_constraint_index[c1]);</div><div class="line"><a name="l05553"></a><span class="lineno"> 5553</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l05554"></a><span class="lineno"> 5554</span>  }</div><div class="line"><a name="l05555"></a><span class="lineno"> 5555</span> </div><div class="line"><a name="l05556"></a><span class="lineno"> 5556</span>  <span class="keywordflow">if</span> (ct1-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a5f9869899e2c94786f9709684f1ecc56">constraint_case</a>() == <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35ad60570d9bed938f8b11385a7ba7f3508">ConstraintProto::kExactlyOne</a> &&</div><div class="line"><a name="l05557"></a><span class="lineno"> 5557</span>  ct2-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a5f9869899e2c94786f9709684f1ecc56">constraint_case</a>() == <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35ac188c019178783e5be55110601309d7d">ConstraintProto::kLinear</a>) {</div><div class="line"><a name="l05558"></a><span class="lineno"> 5558</span>  <span class="comment">// If we have an exactly one in a linear, we can shift the coefficients of</span></div><div class="line"><a name="l05559"></a><span class="lineno"> 5559</span>  <span class="comment">// all these variables by any constant value. For now, since we only deal</span></div><div class="line"><a name="l05560"></a><span class="lineno"> 5560</span>  <span class="comment">// with positive coefficient, we shift by the min.</span></div><div class="line"><a name="l05561"></a><span class="lineno"> 5561</span>  <span class="comment">//</span></div><div class="line"><a name="l05562"></a><span class="lineno"> 5562</span>  <span class="comment">// TODO(user): It might be more interesting to maximize the number of terms</span></div><div class="line"><a name="l05563"></a><span class="lineno"> 5563</span>  <span class="comment">// that are shifted to zero to reduce the constraint size.</span></div><div class="line"><a name="l05564"></a><span class="lineno"> 5564</span>  absl::flat_hash_set<int> literals(ct1-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a97b0076b5895845545af3380f3ee4113">exactly_one</a>().<a class="code" href="classoperations__research_1_1sat_1_1_bool_argument_proto.html#ae257a6514082fdcf3a9f33dda44c40b7">literals</a>().begin(),</div><div class="line"><a name="l05565"></a><span class="lineno"> 5565</span>  ct1-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a97b0076b5895845545af3380f3ee4113">exactly_one</a>().<a class="code" href="classoperations__research_1_1sat_1_1_bool_argument_proto.html#ae257a6514082fdcf3a9f33dda44c40b7">literals</a>().end());</div><div class="line"><a name="l05566"></a><span class="lineno"> 5566</span>  int64_t min_coeff = <a class="code" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::numeric_limits<int64_t>::max</a>();</div><div class="line"><a name="l05567"></a><span class="lineno"> 5567</span>  <span class="keywordtype">int</span> num_matches = 0;</div><div class="line"><a name="l05568"></a><span class="lineno"> 5568</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < ct2-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a6d1f941c5f8b326673ffd58eb9b1f0ab">linear</a>().<a class="code" href="classoperations__research_1_1sat_1_1_linear_constraint_proto.html#ac7a72ff7bd5bde08ba00f944c5aa3168">vars</a>().size(); ++i) {</div><div class="line"><a name="l05569"></a><span class="lineno"> 5569</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = ct2-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a6d1f941c5f8b326673ffd58eb9b1f0ab">linear</a>().<a class="code" href="classoperations__research_1_1sat_1_1_linear_constraint_proto.html#ac7a72ff7bd5bde08ba00f944c5aa3168">vars</a>(i);</div><div class="line"><a name="l05570"></a><span class="lineno"> 5570</span>  <span class="keywordflow">if</span> (literals.contains(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) {</div><div class="line"><a name="l05571"></a><span class="lineno"> 5571</span>  ++num_matches;</div><div class="line"><a name="l05572"></a><span class="lineno"> 5572</span>  min_coeff = <a class="code" href="alldiff__cst_8cc.html#ad10edae0a852d72fb76afb1c77735045">std::min</a>(min_coeff, std::abs(ct2-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a6d1f941c5f8b326673ffd58eb9b1f0ab">linear</a>().<a class="code" href="classoperations__research_1_1sat_1_1_linear_constraint_proto.html#a50faf32570e4f9cd348c797231fe35e0">coeffs</a>(i)));</div><div class="line"><a name="l05573"></a><span class="lineno"> 5573</span>  }</div><div class="line"><a name="l05574"></a><span class="lineno"> 5574</span>  }</div><div class="line"><a name="l05575"></a><span class="lineno"> 5575</span> </div><div class="line"><a name="l05576"></a><span class="lineno"> 5576</span>  <span class="comment">// If a linear constraint contains more than one at most one, after</span></div><div class="line"><a name="l05577"></a><span class="lineno"> 5577</span>  <span class="comment">// processing one, we might no longer have an inclusion.</span></div><div class="line"><a name="l05578"></a><span class="lineno"> 5578</span>  <span class="keywordflow">if</span> (num_matches != literals.size()) <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l05579"></a><span class="lineno"> 5579</span> </div><div class="line"><a name="l05580"></a><span class="lineno"> 5580</span>  <span class="comment">// TODO(user): It would be cool to propagate other variable domains with</span></div><div class="line"><a name="l05581"></a><span class="lineno"> 5581</span>  <span class="comment">// the knowledge that the partial sum in is [min_coeff, max_coeff]. I am</span></div><div class="line"><a name="l05582"></a><span class="lineno"> 5582</span>  <span class="comment">// a bit relunctant to duplicate the code for that here.</span></div><div class="line"><a name="l05583"></a><span class="lineno"> 5583</span>  <span class="keywordtype">int</span> new_size = 0;</div><div class="line"><a name="l05584"></a><span class="lineno"> 5584</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < ct2-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a6d1f941c5f8b326673ffd58eb9b1f0ab">linear</a>().<a class="code" href="classoperations__research_1_1sat_1_1_linear_constraint_proto.html#ac7a72ff7bd5bde08ba00f944c5aa3168">vars</a>().size(); ++i) {</div><div class="line"><a name="l05585"></a><span class="lineno"> 5585</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = ct2-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a6d1f941c5f8b326673ffd58eb9b1f0ab">linear</a>().<a class="code" href="classoperations__research_1_1sat_1_1_linear_constraint_proto.html#ac7a72ff7bd5bde08ba00f944c5aa3168">vars</a>(i);</div><div class="line"><a name="l05586"></a><span class="lineno"> 5586</span>  int64_t coeff = ct2-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a6d1f941c5f8b326673ffd58eb9b1f0ab">linear</a>().<a class="code" href="classoperations__research_1_1sat_1_1_linear_constraint_proto.html#a50faf32570e4f9cd348c797231fe35e0">coeffs</a>(i);</div><div class="line"><a name="l05587"></a><span class="lineno"> 5587</span>  <span class="keywordflow">if</span> (literals.contains(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) {</div><div class="line"><a name="l05588"></a><span class="lineno"> 5588</span>  <a class="code" href="base_2logging_8h.html#a7cc25402ecd7591b4c39934dd656b1f9">CHECK_GE</a>(coeff, 0);</div><div class="line"><a name="l05589"></a><span class="lineno"> 5589</span>  <span class="keywordflow">if</span> (coeff == min_coeff) <span class="keywordflow">continue</span>; <span class="comment">// delete term.</span></div><div class="line"><a name="l05590"></a><span class="lineno"> 5590</span>  coeff -= min_coeff;</div><div class="line"><a name="l05591"></a><span class="lineno"> 5591</span>  }</div><div class="line"><a name="l05592"></a><span class="lineno"> 5592</span>  ct2-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ad653c55b371ae98444295965c6622ddb">mutable_linear</a>()-><a class="code" href="classoperations__research_1_1sat_1_1_linear_constraint_proto.html#a7122a1b5e0cfa809e71e6a4669babc32">set_vars</a>(new_size, <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l05593"></a><span class="lineno"> 5593</span>  ct2-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ad653c55b371ae98444295965c6622ddb">mutable_linear</a>()-><a class="code" href="classoperations__research_1_1sat_1_1_linear_constraint_proto.html#ab59665fa3051a704378a94693636fd3b">set_coeffs</a>(new_size, coeff);</div><div class="line"><a name="l05594"></a><span class="lineno"> 5594</span>  ++new_size;</div><div class="line"><a name="l05595"></a><span class="lineno"> 5595</span>  }</div><div class="line"><a name="l05596"></a><span class="lineno"> 5596</span> </div><div class="line"><a name="l05597"></a><span class="lineno"> 5597</span>  ct2-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ad653c55b371ae98444295965c6622ddb">mutable_linear</a>()-><a class="code" href="classoperations__research_1_1sat_1_1_linear_constraint_proto.html#a4392924fce7f5d9851171c0915a478a6">mutable_vars</a>()->Truncate(new_size);</div><div class="line"><a name="l05598"></a><span class="lineno"> 5598</span>  ct2-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ad653c55b371ae98444295965c6622ddb">mutable_linear</a>()-><a class="code" href="classoperations__research_1_1sat_1_1_linear_constraint_proto.html#acf12f419c63aff52dc9ba6292586e9fc">mutable_coeffs</a>()->Truncate(new_size);</div><div class="line"><a name="l05599"></a><span class="lineno"> 5599</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a901c19b12842f8af153e588a689a90b5">FillDomainInProto</a>(</div><div class="line"><a name="l05600"></a><span class="lineno"> 5600</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#ab1240060466ba48a36a4b36379bce26a">ReadDomainFromProto</a>(ct2-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a6d1f941c5f8b326673ffd58eb9b1f0ab">linear</a>()).AdditionWith(Domain(-min_coeff)),</div><div class="line"><a name="l05601"></a><span class="lineno"> 5601</span>  ct2-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ad653c55b371ae98444295965c6622ddb">mutable_linear</a>());</div><div class="line"><a name="l05602"></a><span class="lineno"> 5602</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab75a27c0aeda2de9c3957719b8196c36">UpdateConstraintVariableUsage</a>(original_constraint_index[c2]);</div><div class="line"><a name="l05603"></a><span class="lineno"> 5603</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"setppc: reduced linear coefficients."</span>);</div><div class="line"><a name="l05604"></a><span class="lineno"> 5604</span>  }</div><div class="line"><a name="l05605"></a><span class="lineno"> 5605</span> </div><div class="line"><a name="l05606"></a><span class="lineno"> 5606</span>  <span class="comment">// We can't deduce anything in the last remaining case:</span></div><div class="line"><a name="l05607"></a><span class="lineno"> 5607</span>  <span class="comment">// ct1->constraint_case() == ConstraintProto::kAtMostOne &&</span></div><div class="line"><a name="l05608"></a><span class="lineno"> 5608</span>  <span class="comment">// ct2->constraint_case() == ConstraintProto::kBoolOr</span></div><div class="line"><a name="l05609"></a><span class="lineno"> 5609</span> </div><div class="line"><a name="l05610"></a><span class="lineno"> 5610</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l05611"></a><span class="lineno"> 5611</span> }</div><div class="line"><a name="l05612"></a><span class="lineno"> 5612</span> </div><div class="line"><a name="l05613"></a><span class="lineno"> 5613</span> <span class="comment">// TODO(user): TransformIntoMaxCliques() convert the bool_and to</span></div><div class="line"><a name="l05614"></a><span class="lineno"> 5614</span> <span class="comment">// at_most_one, but maybe also duplicating them into bool_or would allow this</span></div><div class="line"><a name="l05615"></a><span class="lineno"> 5615</span> <span class="comment">// function to do more presolving.</span></div><div class="line"><a name="l05616"></a><span class="lineno"> 5616</span> <span class="keywordtype">bool</span> CpModelPresolver::ProcessSetPPC() {</div><div class="line"><a name="l05617"></a><span class="lineno"> 5617</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> num_constraints = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#aeaf0da781ca9b370d96b7fbd3f74266a">constraints_size</a>();</div><div class="line"><a name="l05618"></a><span class="lineno"> 5618</span> </div><div class="line"><a name="l05619"></a><span class="lineno"> 5619</span>  <span class="comment">// Signatures of all the constraints. In the signature the bit i is 1 if it</span></div><div class="line"><a name="l05620"></a><span class="lineno"> 5620</span>  <span class="comment">// contains a literal l such that l%64 = i.</span></div><div class="line"><a name="l05621"></a><span class="lineno"> 5621</span>  std::vector<uint64_t> signatures;</div><div class="line"><a name="l05622"></a><span class="lineno"> 5622</span> </div><div class="line"><a name="l05623"></a><span class="lineno"> 5623</span>  <span class="comment">// Graph of constraints to literals. constraint_literals[c] contains all the</span></div><div class="line"><a name="l05624"></a><span class="lineno"> 5624</span>  <span class="comment">// literals in constraint indexed by 'c' in sorted order.</span></div><div class="line"><a name="l05625"></a><span class="lineno"> 5625</span>  std::vector<std::vector<int>> constraint_literals;</div><div class="line"><a name="l05626"></a><span class="lineno"> 5626</span> </div><div class="line"><a name="l05627"></a><span class="lineno"> 5627</span>  <span class="comment">// Graph of literals to constraints. literals_to_constraints[l] contains the</span></div><div class="line"><a name="l05628"></a><span class="lineno"> 5628</span>  <span class="comment">// vector of constraint indices in which literal 'l' or 'neg(l)' appears.</span></div><div class="line"><a name="l05629"></a><span class="lineno"> 5629</span>  std::vector<std::vector<int>> literals_to_constraints;</div><div class="line"><a name="l05630"></a><span class="lineno"> 5630</span> </div><div class="line"><a name="l05631"></a><span class="lineno"> 5631</span>  <span class="comment">// vector of booleans indicating if the constraint was already removed.</span></div><div class="line"><a name="l05632"></a><span class="lineno"> 5632</span>  std::vector<bool> removed;</div><div class="line"><a name="l05633"></a><span class="lineno"> 5633</span> </div><div class="line"><a name="l05634"></a><span class="lineno"> 5634</span>  <span class="comment">// The containers above use the local indices for setppc constraints. We store</span></div><div class="line"><a name="l05635"></a><span class="lineno"> 5635</span>  <span class="comment">// the original constraint indices corresponding to those local indices here.</span></div><div class="line"><a name="l05636"></a><span class="lineno"> 5636</span>  std::vector<int> original_constraint_index;</div><div class="line"><a name="l05637"></a><span class="lineno"> 5637</span> </div><div class="line"><a name="l05638"></a><span class="lineno"> 5638</span>  <span class="comment">// Fill the initial constraint <-> literal graph, compute signatures and</span></div><div class="line"><a name="l05639"></a><span class="lineno"> 5639</span>  <span class="comment">// initialize other containers defined above.</span></div><div class="line"><a name="l05640"></a><span class="lineno"> 5640</span>  <span class="keywordtype">int</span> num_setppc_constraints = 0;</div><div class="line"><a name="l05641"></a><span class="lineno"> 5641</span>  std::vector<int> temp_literals;</div><div class="line"><a name="l05642"></a><span class="lineno"> 5642</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l05643"></a><span class="lineno"> 5643</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> c = 0; c < num_constraints; ++c) {</div><div class="line"><a name="l05644"></a><span class="lineno"> 5644</span>  ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a> = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a9b3e1bc8b76ea7d2614fd7ec2b066039">mutable_constraints</a>(c);</div><div class="line"><a name="l05645"></a><span class="lineno"> 5645</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->constraint_case() == <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35aaadb0c3370c597095e0cb7e768f04567">ConstraintProto::kBoolOr</a> ||</div><div class="line"><a name="l05646"></a><span class="lineno"> 5646</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->constraint_case() == <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35a60d782b0aafa6f70b6230ffd970b2c6b">ConstraintProto::kAtMostOne</a> ||</div><div class="line"><a name="l05647"></a><span class="lineno"> 5647</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->constraint_case() == <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35ad60570d9bed938f8b11385a7ba7f3508">ConstraintProto::kExactlyOne</a>) {</div><div class="line"><a name="l05648"></a><span class="lineno"> 5648</span>  <span class="comment">// Because TransformIntoMaxCliques() can detect literal equivalence</span></div><div class="line"><a name="l05649"></a><span class="lineno"> 5649</span>  <span class="comment">// relation, we make sure the constraints are presolved before being</span></div><div class="line"><a name="l05650"></a><span class="lineno"> 5650</span>  <span class="comment">// inspected.</span></div><div class="line"><a name="l05651"></a><span class="lineno"> 5651</span>  <span class="keywordflow">if</span> (<a class="code" href="classoperations__research_1_1sat_1_1_cp_model_presolver.html#ab37522044009144ac6eff3b3d4c1d271">PresolveOneConstraint</a>(c)) {</div><div class="line"><a name="l05652"></a><span class="lineno"> 5652</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab75a27c0aeda2de9c3957719b8196c36">UpdateConstraintVariableUsage</a>(c);</div><div class="line"><a name="l05653"></a><span class="lineno"> 5653</span>  }</div><div class="line"><a name="l05654"></a><span class="lineno"> 5654</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l05655"></a><span class="lineno"> 5655</span>  constraint_literals.push_back(GetLiteralsFromSetPPCConstraint(*<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>));</div><div class="line"><a name="l05656"></a><span class="lineno"> 5656</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->constraint_case() == <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35ac188c019178783e5be55110601309d7d">ConstraintProto::kLinear</a>) {</div><div class="line"><a name="l05657"></a><span class="lineno"> 5657</span>  <span class="comment">// We also want to test inclusion with the pseudo-Boolean part of</span></div><div class="line"><a name="l05658"></a><span class="lineno"> 5658</span>  <span class="comment">// linear constraints of size at least 3. Exactly one of size two are</span></div><div class="line"><a name="l05659"></a><span class="lineno"> 5659</span>  <span class="comment">// equivalent literals, and we already deal with this case.</span></div><div class="line"><a name="l05660"></a><span class="lineno"> 5660</span>  <span class="comment">//</span></div><div class="line"><a name="l05661"></a><span class="lineno"> 5661</span>  <span class="comment">// TODO(user): This is not ideal as we currently only process exactly one</span></div><div class="line"><a name="l05662"></a><span class="lineno"> 5662</span>  <span class="comment">// included into linear, and we add overhead by detecting all the other</span></div><div class="line"><a name="l05663"></a><span class="lineno"> 5663</span>  <span class="comment">// cases that we ignore later. That said, we could just propagate a bit</span></div><div class="line"><a name="l05664"></a><span class="lineno"> 5664</span>  <span class="comment">// more the domain if we know at_least_one or at_most_one between literals</span></div><div class="line"><a name="l05665"></a><span class="lineno"> 5665</span>  <span class="comment">// in a linear constraint.</span></div><div class="line"><a name="l05666"></a><span class="lineno"> 5666</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> size = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().vars().size();</div><div class="line"><a name="l05667"></a><span class="lineno"> 5667</span>  <span class="keywordflow">if</span> (size <= 2) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l05668"></a><span class="lineno"> 5668</span> </div><div class="line"><a name="l05669"></a><span class="lineno"> 5669</span>  <span class="comment">// TODO(user): We only deal with every literal having a positive coeff</span></div><div class="line"><a name="l05670"></a><span class="lineno"> 5670</span>  <span class="comment">// here. We should probably do the same with all negative. We can also</span></div><div class="line"><a name="l05671"></a><span class="lineno"> 5671</span>  <span class="comment">// consider NegatedRef(var).</span></div><div class="line"><a name="l05672"></a><span class="lineno"> 5672</span>  temp_literals.clear();</div><div class="line"><a name="l05673"></a><span class="lineno"> 5673</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < size; ++i) {</div><div class="line"><a name="l05674"></a><span class="lineno"> 5674</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().vars(i);</div><div class="line"><a name="l05675"></a><span class="lineno"> 5675</span>  <span class="keyword">const</span> int64_t coeff = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->linear().coeffs(i);</div><div class="line"><a name="l05676"></a><span class="lineno"> 5676</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af188bac2776d4545aab9405f5c801cd8">CanBeUsedAsLiteral</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l05677"></a><span class="lineno"> 5677</span>  <span class="keywordflow">if</span> (!<a class="code" href="namespaceoperations__research_1_1sat.html#a217338425de4389014563f1f24331713">RefIsPositive</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l05678"></a><span class="lineno"> 5678</span>  <span class="keywordflow">if</span> (coeff < 0) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l05679"></a><span class="lineno"> 5679</span>  temp_literals.push_back(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l05680"></a><span class="lineno"> 5680</span>  }</div><div class="line"><a name="l05681"></a><span class="lineno"> 5681</span>  <span class="keywordflow">if</span> (temp_literals.size() <= 2) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l05682"></a><span class="lineno"> 5682</span>  constraint_literals.push_back(temp_literals);</div><div class="line"><a name="l05683"></a><span class="lineno"> 5683</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l05684"></a><span class="lineno"> 5684</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l05685"></a><span class="lineno"> 5685</span>  }</div><div class="line"><a name="l05686"></a><span class="lineno"> 5686</span> </div><div class="line"><a name="l05687"></a><span class="lineno"> 5687</span>  uint64_t signature = 0;</div><div class="line"><a name="l05688"></a><span class="lineno"> 5688</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a> : constraint_literals.back()) {</div><div class="line"><a name="l05689"></a><span class="lineno"> 5689</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> positive_literal = <a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>);</div><div class="line"><a name="l05690"></a><span class="lineno"> 5690</span>  signature |= (int64_t{1} << (positive_literal % 64));</div><div class="line"><a name="l05691"></a><span class="lineno"> 5691</span>  <a class="code" href="base_2logging_8h.html#aae2dc65d9ea248d54bf39daa986dd295">DCHECK_GE</a>(positive_literal, 0);</div><div class="line"><a name="l05692"></a><span class="lineno"> 5692</span>  <span class="keywordflow">if</span> (positive_literal >= literals_to_constraints.size()) {</div><div class="line"><a name="l05693"></a><span class="lineno"> 5693</span>  literals_to_constraints.resize(positive_literal + 1);</div><div class="line"><a name="l05694"></a><span class="lineno"> 5694</span>  }</div><div class="line"><a name="l05695"></a><span class="lineno"> 5695</span>  literals_to_constraints[positive_literal].push_back(</div><div class="line"><a name="l05696"></a><span class="lineno"> 5696</span>  num_setppc_constraints);</div><div class="line"><a name="l05697"></a><span class="lineno"> 5697</span>  }</div><div class="line"><a name="l05698"></a><span class="lineno"> 5698</span>  signatures.push_back(signature);</div><div class="line"><a name="l05699"></a><span class="lineno"> 5699</span>  removed.push_back(<span class="keyword">false</span>);</div><div class="line"><a name="l05700"></a><span class="lineno"> 5700</span>  original_constraint_index.push_back(c);</div><div class="line"><a name="l05701"></a><span class="lineno"> 5701</span>  num_setppc_constraints++;</div><div class="line"><a name="l05702"></a><span class="lineno"> 5702</span>  }</div><div class="line"><a name="l05703"></a><span class="lineno"> 5703</span>  <a class="code" href="base_2logging_8h.html#afcaa7cadd41741bb855c2ada1d2ef927">VLOG</a>(1) << <span class="stringliteral">"#setppc constraints: "</span> << num_setppc_constraints;</div><div class="line"><a name="l05704"></a><span class="lineno"> 5704</span> </div><div class="line"><a name="l05705"></a><span class="lineno"> 5705</span>  <span class="comment">// Set of constraint pairs which are already compared.</span></div><div class="line"><a name="l05706"></a><span class="lineno"> 5706</span>  absl::flat_hash_set<std::pair<int, int>> compared_constraints;</div><div class="line"><a name="l05707"></a><span class="lineno"> 5707</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> std::vector<int>& literal_to_constraints :</div><div class="line"><a name="l05708"></a><span class="lineno"> 5708</span>  literals_to_constraints) {</div><div class="line"><a name="l05709"></a><span class="lineno"> 5709</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> index1 = 0; index1 < literal_to_constraints.size(); ++index1) {</div><div class="line"><a name="l05710"></a><span class="lineno"> 5710</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a0704cc50211ab739309aa9f54aa8c606">time_limit</a>()-><a class="code" href="classoperations__research_1_1_time_limit.html#a810d5f7aaf80cc09cf5a094e20c1aaca">LimitReached</a>()) <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l05711"></a><span class="lineno"> 5711</span> </div><div class="line"><a name="l05712"></a><span class="lineno"> 5712</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> c1 = literal_to_constraints[index1];</div><div class="line"><a name="l05713"></a><span class="lineno"> 5713</span>  <span class="keywordflow">if</span> (removed[c1]) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l05714"></a><span class="lineno"> 5714</span>  <span class="keyword">const</span> std::vector<int>& c1_literals = constraint_literals[c1];</div><div class="line"><a name="l05715"></a><span class="lineno"> 5715</span> </div><div class="line"><a name="l05716"></a><span class="lineno"> 5716</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> index2 = index1 + 1; index2 < literal_to_constraints.size();</div><div class="line"><a name="l05717"></a><span class="lineno"> 5717</span>  ++index2) {</div><div class="line"><a name="l05718"></a><span class="lineno"> 5718</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> c2 = literal_to_constraints[index2];</div><div class="line"><a name="l05719"></a><span class="lineno"> 5719</span>  <span class="keywordflow">if</span> (removed[c2]) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l05720"></a><span class="lineno"> 5720</span>  <span class="keywordflow">if</span> (removed[c1]) <span class="keywordflow">break</span>;</div><div class="line"><a name="l05721"></a><span class="lineno"> 5721</span> </div><div class="line"><a name="l05722"></a><span class="lineno"> 5722</span>  <span class="comment">// TODO(user): This should not happen. Investigate.</span></div><div class="line"><a name="l05723"></a><span class="lineno"> 5723</span>  <span class="keywordflow">if</span> (c1 == c2) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l05724"></a><span class="lineno"> 5724</span> </div><div class="line"><a name="l05725"></a><span class="lineno"> 5725</span>  <a class="code" href="base_2logging_8h.html#a4bd2e815ca2f702a4b6aa744b1ff3b82">CHECK_LT</a>(c1, c2);</div><div class="line"><a name="l05726"></a><span class="lineno"> 5726</span>  <span class="keywordflow">if</span> (<a class="code" href="namespacegtl.html#aae28e97bd1fa93cb0032642550da7455">gtl::ContainsKey</a>(compared_constraints,</div><div class="line"><a name="l05727"></a><span class="lineno"> 5727</span>  std::pair<int, int>(c1, c2))) {</div><div class="line"><a name="l05728"></a><span class="lineno"> 5728</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l05729"></a><span class="lineno"> 5729</span>  }</div><div class="line"><a name="l05730"></a><span class="lineno"> 5730</span>  compared_constraints.insert({c1, c2});</div><div class="line"><a name="l05731"></a><span class="lineno"> 5731</span> </div><div class="line"><a name="l05732"></a><span class="lineno"> 5732</span>  <span class="comment">// Hard limit on number of comparisons to avoid spending too much time</span></div><div class="line"><a name="l05733"></a><span class="lineno"> 5733</span>  <span class="comment">// here.</span></div><div class="line"><a name="l05734"></a><span class="lineno"> 5734</span>  <span class="keywordflow">if</span> (compared_constraints.size() >= 50000) <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l05735"></a><span class="lineno"> 5735</span> </div><div class="line"><a name="l05736"></a><span class="lineno"> 5736</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> smaller = (signatures[c1] & ~signatures[c2]) == 0;</div><div class="line"><a name="l05737"></a><span class="lineno"> 5737</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> larger = (signatures[c2] & ~signatures[c1]) == 0;</div><div class="line"><a name="l05738"></a><span class="lineno"> 5738</span>  <span class="keywordflow">if</span> (!(smaller || larger)) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l05739"></a><span class="lineno"> 5739</span> </div><div class="line"><a name="l05740"></a><span class="lineno"> 5740</span>  <span class="comment">// Check if literals in c1 is subset of literals in c2 or vice versa.</span></div><div class="line"><a name="l05741"></a><span class="lineno"> 5741</span>  <span class="keyword">const</span> std::vector<int>& c2_literals = constraint_literals[c2];</div><div class="line"><a name="l05742"></a><span class="lineno"> 5742</span> </div><div class="line"><a name="l05743"></a><span class="lineno"> 5743</span>  <span class="comment">// TODO(user): Try avoiding computation of set differences if</span></div><div class="line"><a name="l05744"></a><span class="lineno"> 5744</span>  <span class="comment">// possible.</span></div><div class="line"><a name="l05745"></a><span class="lineno"> 5745</span>  std::vector<int> c1_minus_c2;</div><div class="line"><a name="l05746"></a><span class="lineno"> 5746</span>  <a class="code" href="namespacegtl.html#a68e6f9ee67c1545cc1da3d0b9a2ba0fd">gtl::STLSetDifference</a>(c1_literals, c2_literals, &c1_minus_c2);</div><div class="line"><a name="l05747"></a><span class="lineno"> 5747</span>  std::vector<int> c2_minus_c1;</div><div class="line"><a name="l05748"></a><span class="lineno"> 5748</span>  <a class="code" href="namespacegtl.html#a68e6f9ee67c1545cc1da3d0b9a2ba0fd">gtl::STLSetDifference</a>(c2_literals, c1_literals, &c2_minus_c1);</div><div class="line"><a name="l05749"></a><span class="lineno"> 5749</span> </div><div class="line"><a name="l05750"></a><span class="lineno"> 5750</span>  <span class="keywordflow">if</span> (c1_minus_c2.empty()) { <span class="comment">// c1 included in c2.</span></div><div class="line"><a name="l05751"></a><span class="lineno"> 5751</span>  <span class="keywordflow">if</span> (!ProcessSetPPCSubset(c1, c2, c2_minus_c1,</div><div class="line"><a name="l05752"></a><span class="lineno"> 5752</span>  original_constraint_index, &removed)) {</div><div class="line"><a name="l05753"></a><span class="lineno"> 5753</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l05754"></a><span class="lineno"> 5754</span>  }</div><div class="line"><a name="l05755"></a><span class="lineno"> 5755</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (c2_minus_c1.empty()) { <span class="comment">// c2 included in c1.</span></div><div class="line"><a name="l05756"></a><span class="lineno"> 5756</span>  <span class="keywordflow">if</span> (!ProcessSetPPCSubset(c2, c1, c1_minus_c2,</div><div class="line"><a name="l05757"></a><span class="lineno"> 5757</span>  original_constraint_index, &removed)) {</div><div class="line"><a name="l05758"></a><span class="lineno"> 5758</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l05759"></a><span class="lineno"> 5759</span>  }</div><div class="line"><a name="l05760"></a><span class="lineno"> 5760</span>  }</div><div class="line"><a name="l05761"></a><span class="lineno"> 5761</span>  }</div><div class="line"><a name="l05762"></a><span class="lineno"> 5762</span>  }</div><div class="line"><a name="l05763"></a><span class="lineno"> 5763</span>  }</div><div class="line"><a name="l05764"></a><span class="lineno"> 5764</span> </div><div class="line"><a name="l05765"></a><span class="lineno"> 5765</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l05766"></a><span class="lineno"> 5766</span> }</div><div class="line"><a name="l05767"></a><span class="lineno"> 5767</span> </div><div class="line"><a name="l05768"></a><span class="lineno"> 5768</span> <span class="keywordtype">void</span> CpModelPresolver::TryToSimplifyDomain(<span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) {</div><div class="line"><a name="l05769"></a><span class="lineno"> 5769</span>  <a class="code" href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a>(<a class="code" href="namespaceoperations__research_1_1sat.html#a217338425de4389014563f1f24331713">RefIsPositive</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>));</div><div class="line"><a name="l05770"></a><span class="lineno"> 5770</span>  <a class="code" href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a>(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a2563663eeef59c23110ae4e2a80d8c9f">ConstraintVariableGraphIsUpToDate</a>());</div><div class="line"><a name="l05771"></a><span class="lineno"> 5771</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span>;</div><div class="line"><a name="l05772"></a><span class="lineno"> 5772</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#abb6eb29f56c3a33b8ae1b74b08b755c2">IsFixed</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) <span class="keywordflow">return</span>;</div><div class="line"><a name="l05773"></a><span class="lineno"> 5773</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af248c1021eda72d628e2f3537eb98ded">VariableWasRemoved</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) <span class="keywordflow">return</span>;</div><div class="line"><a name="l05774"></a><span class="lineno"> 5774</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab246112417bad87cb948820e304208ab">VariableIsNotUsedAnymore</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) <span class="keywordflow">return</span>;</div><div class="line"><a name="l05775"></a><span class="lineno"> 5775</span> </div><div class="line"><a name="l05776"></a><span class="lineno"> 5776</span>  <span class="keyword">const</span> AffineRelation::Relation r = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aaddc5f58e8a40a5a308531949153f814">GetAffineRelation</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l05777"></a><span class="lineno"> 5777</span>  <span class="keywordflow">if</span> (r.representative != <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) <span class="keywordflow">return</span>;</div><div class="line"><a name="l05778"></a><span class="lineno"> 5778</span> </div><div class="line"><a name="l05779"></a><span class="lineno"> 5779</span>  <span class="comment">// TODO(user): We can still remove the variable even if we want to keep</span></div><div class="line"><a name="l05780"></a><span class="lineno"> 5780</span>  <span class="comment">// all feasible solutions for the cases when we have a full encoding.</span></div><div class="line"><a name="l05781"></a><span class="lineno"> 5781</span>  <span class="comment">//</span></div><div class="line"><a name="l05782"></a><span class="lineno"> 5782</span>  <span class="comment">// TODO(user): In fixed search, we disable this rule because we don't update</span></div><div class="line"><a name="l05783"></a><span class="lineno"> 5783</span>  <span class="comment">// the search strategy, but for some strategy we could.</span></div><div class="line"><a name="l05784"></a><span class="lineno"> 5784</span>  <span class="comment">//</span></div><div class="line"><a name="l05785"></a><span class="lineno"> 5785</span>  <span class="comment">// TODO(user): The hint might get lost if the encoding was created during</span></div><div class="line"><a name="l05786"></a><span class="lineno"> 5786</span>  <span class="comment">// the presolve.</span></div><div class="line"><a name="l05787"></a><span class="lineno"> 5787</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a0000c1621c1de75511d17c9d14aae0e8">VariableIsRemovable</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) &&</div><div class="line"><a name="l05788"></a><span class="lineno"> 5788</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af7e074480c08f4887da40ca045624b6c">VariableIsOnlyUsedInEncodingAndMaybeInObjective</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) &&</div><div class="line"><a name="l05789"></a><span class="lineno"> 5789</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aaabb604ccac4a6136be93bfe64e2290d">params</a>().<a class="code" href="classoperations__research_1_1sat_1_1_sat_parameters.html#a257e99b653bc762af5410936511fc5da">search_branching</a>() != <a class="code" href="classoperations__research_1_1sat_1_1_sat_parameters.html#afc7419e2f33992c4a7b8b0decd1dc3e0">SatParameters::FIXED_SEARCH</a>) {</div><div class="line"><a name="l05790"></a><span class="lineno"> 5790</span>  <span class="comment">// Detect the full encoding case without extra constraint.</span></div><div class="line"><a name="l05791"></a><span class="lineno"> 5791</span>  <span class="comment">// This is the simplest to deal with as we can just add an exactly one</span></div><div class="line"><a name="l05792"></a><span class="lineno"> 5792</span>  <span class="comment">// constraint and remove all the linear1.</span></div><div class="line"><a name="l05793"></a><span class="lineno"> 5793</span>  std::vector<int> literals;</div><div class="line"><a name="l05794"></a><span class="lineno"> 5794</span>  std::vector<int> equality_constraints;</div><div class="line"><a name="l05795"></a><span class="lineno"> 5795</span>  std::vector<int> other_constraints;</div><div class="line"><a name="l05796"></a><span class="lineno"> 5796</span>  absl::flat_hash_map<int64_t, int> value_to_equal_literal;</div><div class="line"><a name="l05797"></a><span class="lineno"> 5797</span>  absl::flat_hash_map<int64_t, int> value_to_not_equal_literal;</div><div class="line"><a name="l05798"></a><span class="lineno"> 5798</span>  <span class="keywordtype">bool</span> abort = <span class="keyword">false</span>;</div><div class="line"><a name="l05799"></a><span class="lineno"> 5799</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> c : context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#acf72cafd3dab9ac4b5e5b1a3aaa75192">VarToConstraints</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) {</div><div class="line"><a name="l05800"></a><span class="lineno"> 5800</span>  <span class="keywordflow">if</span> (c < 0) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l05801"></a><span class="lineno"> 5801</span>  <span class="keyword">const</span> ConstraintProto& <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a> = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#afce66afa8ae7776a449bba7313ea3559">constraints</a>(c);</div><div class="line"><a name="l05802"></a><span class="lineno"> 5802</span>  <a class="code" href="base_2logging_8h.html#a7c0ce053b28d53aa4eaf3eb7fb71663b">CHECK_EQ</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.constraint_case(), <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35ac188c019178783e5be55110601309d7d">ConstraintProto::kLinear</a>);</div><div class="line"><a name="l05803"></a><span class="lineno"> 5803</span>  <a class="code" href="base_2logging_8h.html#a7c0ce053b28d53aa4eaf3eb7fb71663b">CHECK_EQ</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.linear().vars().size(), 1);</div><div class="line"><a name="l05804"></a><span class="lineno"> 5804</span>  int64_t coeff = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.linear().coeffs(0);</div><div class="line"><a name="l05805"></a><span class="lineno"> 5805</span>  <span class="keywordflow">if</span> (std::abs(coeff) != 1 || <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.enforcement_literal().size() != 1) {</div><div class="line"><a name="l05806"></a><span class="lineno"> 5806</span>  abort = <span class="keyword">true</span>;</div><div class="line"><a name="l05807"></a><span class="lineno"> 5807</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l05808"></a><span class="lineno"> 5808</span>  }</div><div class="line"><a name="l05809"></a><span class="lineno"> 5809</span>  <span class="keywordflow">if</span> (!<a class="code" href="namespaceoperations__research_1_1sat.html#a217338425de4389014563f1f24331713">RefIsPositive</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.linear().vars(0))) coeff *= 1;</div><div class="line"><a name="l05810"></a><span class="lineno"> 5810</span>  <span class="keyword">const</span> Domain rhs =</div><div class="line"><a name="l05811"></a><span class="lineno"> 5811</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#ab1240060466ba48a36a4b36379bce26a">ReadDomainFromProto</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.linear()).InverseMultiplicationBy(coeff);</div><div class="line"><a name="l05812"></a><span class="lineno"> 5812</span> </div><div class="line"><a name="l05813"></a><span class="lineno"> 5813</span>  <span class="keywordflow">if</span> (rhs.IsFixed()) {</div><div class="line"><a name="l05814"></a><span class="lineno"> 5814</span>  <span class="keyword">const</span> int64_t <a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a> = rhs.FixedValue();</div><div class="line"><a name="l05815"></a><span class="lineno"> 5815</span>  <span class="keywordflow">if</span> (value_to_equal_literal.contains(<a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a>)) {</div><div class="line"><a name="l05816"></a><span class="lineno"> 5816</span>  abort = <span class="keyword">true</span>;</div><div class="line"><a name="l05817"></a><span class="lineno"> 5817</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l05818"></a><span class="lineno"> 5818</span>  }</div><div class="line"><a name="l05819"></a><span class="lineno"> 5819</span>  equality_constraints.push_back(c);</div><div class="line"><a name="l05820"></a><span class="lineno"> 5820</span>  literals.push_back(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.enforcement_literal(0));</div><div class="line"><a name="l05821"></a><span class="lineno"> 5821</span>  value_to_equal_literal[<a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a>] = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.enforcement_literal(0);</div><div class="line"><a name="l05822"></a><span class="lineno"> 5822</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l05823"></a><span class="lineno"> 5823</span>  <span class="keyword">const</span> Domain complement =</div><div class="line"><a name="l05824"></a><span class="lineno"> 5824</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>).<a class="code" href="classoperations__research_1_1_domain.html#a835826c4c5129b74553042a357a721ff">IntersectionWith</a>(rhs.Complement());</div><div class="line"><a name="l05825"></a><span class="lineno"> 5825</span>  <span class="keywordflow">if</span> (complement.IsEmpty()) {</div><div class="line"><a name="l05826"></a><span class="lineno"> 5826</span>  <span class="comment">// TODO(user): This should be dealt with elsewhere.</span></div><div class="line"><a name="l05827"></a><span class="lineno"> 5827</span>  abort = <span class="keyword">true</span>;</div><div class="line"><a name="l05828"></a><span class="lineno"> 5828</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l05829"></a><span class="lineno"> 5829</span>  }</div><div class="line"><a name="l05830"></a><span class="lineno"> 5830</span>  <span class="keywordflow">if</span> (complement.IsFixed()) {</div><div class="line"><a name="l05831"></a><span class="lineno"> 5831</span>  <span class="keyword">const</span> int64_t <a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a> = complement.FixedValue();</div><div class="line"><a name="l05832"></a><span class="lineno"> 5832</span>  <span class="keywordflow">if</span> (value_to_not_equal_literal.contains(<a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a>)) {</div><div class="line"><a name="l05833"></a><span class="lineno"> 5833</span>  abort = <span class="keyword">true</span>;</div><div class="line"><a name="l05834"></a><span class="lineno"> 5834</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l05835"></a><span class="lineno"> 5835</span>  }</div><div class="line"><a name="l05836"></a><span class="lineno"> 5836</span>  other_constraints.push_back(c);</div><div class="line"><a name="l05837"></a><span class="lineno"> 5837</span>  value_to_not_equal_literal[<a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a>] = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.enforcement_literal(0);</div><div class="line"><a name="l05838"></a><span class="lineno"> 5838</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l05839"></a><span class="lineno"> 5839</span>  abort = <span class="keyword">true</span>;</div><div class="line"><a name="l05840"></a><span class="lineno"> 5840</span>  }</div><div class="line"><a name="l05841"></a><span class="lineno"> 5841</span>  }</div><div class="line"><a name="l05842"></a><span class="lineno"> 5842</span>  }</div><div class="line"><a name="l05843"></a><span class="lineno"> 5843</span> </div><div class="line"><a name="l05844"></a><span class="lineno"> 5844</span>  <span class="comment">// For a full encoding, we don't need all the not equal constraint to be</span></div><div class="line"><a name="l05845"></a><span class="lineno"> 5845</span>  <span class="comment">// present.</span></div><div class="line"><a name="l05846"></a><span class="lineno"> 5846</span>  <span class="keywordflow">if</span> (value_to_equal_literal.size() != context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>).<a class="code" href="classoperations__research_1_1_domain.html#a572bd92c25ebc67c72137fd59e53f6d6">Size</a>()) {</div><div class="line"><a name="l05847"></a><span class="lineno"> 5847</span>  abort = <span class="keyword">true</span>;</div><div class="line"><a name="l05848"></a><span class="lineno"> 5848</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l05849"></a><span class="lineno"> 5849</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> int64_t <a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a> : context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>).<a class="code" href="classoperations__research_1_1_domain.html#ade71ed1801ba29c7190c387511f76044">Values</a>()) {</div><div class="line"><a name="l05850"></a><span class="lineno"> 5850</span>  <span class="keywordflow">if</span> (!value_to_equal_literal.contains(<a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a>)) {</div><div class="line"><a name="l05851"></a><span class="lineno"> 5851</span>  abort = <span class="keyword">true</span>;</div><div class="line"><a name="l05852"></a><span class="lineno"> 5852</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l05853"></a><span class="lineno"> 5853</span>  }</div><div class="line"><a name="l05854"></a><span class="lineno"> 5854</span>  <span class="keywordflow">if</span> (value_to_not_equal_literal.contains(<a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a>) &&</div><div class="line"><a name="l05855"></a><span class="lineno"> 5855</span>  value_to_equal_literal[<a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a>] !=</div><div class="line"><a name="l05856"></a><span class="lineno"> 5856</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(value_to_not_equal_literal[<a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a>])) {</div><div class="line"><a name="l05857"></a><span class="lineno"> 5857</span>  abort = <span class="keyword">true</span>;</div><div class="line"><a name="l05858"></a><span class="lineno"> 5858</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l05859"></a><span class="lineno"> 5859</span>  }</div><div class="line"><a name="l05860"></a><span class="lineno"> 5860</span>  <span class="keywordflow">if</span> (abort) <span class="keywordflow">break</span>;</div><div class="line"><a name="l05861"></a><span class="lineno"> 5861</span>  }</div><div class="line"><a name="l05862"></a><span class="lineno"> 5862</span>  }</div><div class="line"><a name="l05863"></a><span class="lineno"> 5863</span>  <span class="keywordflow">if</span> (abort) {</div><div class="line"><a name="l05864"></a><span class="lineno"> 5864</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"TODO variables: only used in encoding."</span>);</div><div class="line"><a name="l05865"></a><span class="lineno"> 5865</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l05866"></a><span class="lineno"> 5866</span>  <span class="comment">// Update the objective if needed. Note that this operation can fail if</span></div><div class="line"><a name="l05867"></a><span class="lineno"> 5867</span>  <span class="comment">// the new expression result in potential overflow.</span></div><div class="line"><a name="l05868"></a><span class="lineno"> 5868</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#acf72cafd3dab9ac4b5e5b1a3aaa75192">VarToConstraints</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>).contains(<a class="code" href="namespaceoperations__research_1_1sat.html#aca25bc3ffa54b3f2668c6eeddffd8d1d">kObjectiveConstraint</a>)) {</div><div class="line"><a name="l05869"></a><span class="lineno"> 5869</span>  ConstraintProto encoding_ct;</div><div class="line"><a name="l05870"></a><span class="lineno"> 5870</span>  LinearConstraintProto* linear = encoding_ct.mutable_linear();</div><div class="line"><a name="l05871"></a><span class="lineno"> 5871</span>  <span class="keyword">const</span> int64_t coeff_in_equality = -1;</div><div class="line"><a name="l05872"></a><span class="lineno"> 5872</span>  linear->add_vars(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l05873"></a><span class="lineno"> 5873</span>  linear->add_coeffs(coeff_in_equality);</div><div class="line"><a name="l05874"></a><span class="lineno"> 5874</span> </div><div class="line"><a name="l05875"></a><span class="lineno"> 5875</span>  std::vector<int64_t> all_values;</div><div class="line"><a name="l05876"></a><span class="lineno"> 5876</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span> entry : value_to_equal_literal) {</div><div class="line"><a name="l05877"></a><span class="lineno"> 5877</span>  all_values.push_back(entry.first);</div><div class="line"><a name="l05878"></a><span class="lineno"> 5878</span>  }</div><div class="line"><a name="l05879"></a><span class="lineno"> 5879</span>  std::sort(all_values.begin(), all_values.end());</div><div class="line"><a name="l05880"></a><span class="lineno"> 5880</span> </div><div class="line"><a name="l05881"></a><span class="lineno"> 5881</span>  <span class="comment">// We substract the min_value from all coefficients.</span></div><div class="line"><a name="l05882"></a><span class="lineno"> 5882</span>  <span class="comment">// This should reduce the objective size and helps with the bounds.</span></div><div class="line"><a name="l05883"></a><span class="lineno"> 5883</span>  <span class="comment">//</span></div><div class="line"><a name="l05884"></a><span class="lineno"> 5884</span>  <span class="comment">// TODO(user): If the objective coefficient is negative, then we</span></div><div class="line"><a name="l05885"></a><span class="lineno"> 5885</span>  <span class="comment">// should rather substract the max.</span></div><div class="line"><a name="l05886"></a><span class="lineno"> 5886</span>  <a class="code" href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a>(!all_values.empty());</div><div class="line"><a name="l05887"></a><span class="lineno"> 5887</span>  <span class="keyword">const</span> int64_t min_value = all_values[0];</div><div class="line"><a name="l05888"></a><span class="lineno"> 5888</span>  linear->add_domain(-min_value);</div><div class="line"><a name="l05889"></a><span class="lineno"> 5889</span>  linear->add_domain(-min_value);</div><div class="line"><a name="l05890"></a><span class="lineno"> 5890</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> int64_t <a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a> : all_values) {</div><div class="line"><a name="l05891"></a><span class="lineno"> 5891</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a> == min_value) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l05892"></a><span class="lineno"> 5892</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> enf = value_to_equal_literal.at(<a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a>);</div><div class="line"><a name="l05893"></a><span class="lineno"> 5893</span>  <span class="keyword">const</span> int64_t coeff = <a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a> - min_value;</div><div class="line"><a name="l05894"></a><span class="lineno"> 5894</span>  <span class="keywordflow">if</span> (<a class="code" href="namespaceoperations__research_1_1sat.html#a217338425de4389014563f1f24331713">RefIsPositive</a>(enf)) {</div><div class="line"><a name="l05895"></a><span class="lineno"> 5895</span>  linear->add_vars(enf);</div><div class="line"><a name="l05896"></a><span class="lineno"> 5896</span>  linear->add_coeffs(coeff);</div><div class="line"><a name="l05897"></a><span class="lineno"> 5897</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l05898"></a><span class="lineno"> 5898</span>  <span class="comment">// (1 - var) * coeff;</span></div><div class="line"><a name="l05899"></a><span class="lineno"> 5899</span>  linear->set_domain(0, encoding_ct.linear().domain(0) - coeff);</div><div class="line"><a name="l05900"></a><span class="lineno"> 5900</span>  linear->set_domain(1, encoding_ct.linear().domain(1) - coeff);</div><div class="line"><a name="l05901"></a><span class="lineno"> 5901</span>  linear->add_vars(<a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(enf));</div><div class="line"><a name="l05902"></a><span class="lineno"> 5902</span>  linear->add_coeffs(-coeff);</div><div class="line"><a name="l05903"></a><span class="lineno"> 5903</span>  }</div><div class="line"><a name="l05904"></a><span class="lineno"> 5904</span>  }</div><div class="line"><a name="l05905"></a><span class="lineno"> 5905</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a4bf47c6b5724e9a3a7df78486f9bdc41">SubstituteVariableInObjective</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>, coeff_in_equality,</div><div class="line"><a name="l05906"></a><span class="lineno"> 5906</span>  encoding_ct)) {</div><div class="line"><a name="l05907"></a><span class="lineno"> 5907</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(</div><div class="line"><a name="l05908"></a><span class="lineno"> 5908</span>  <span class="stringliteral">"TODO variables: only used in objective and in full encoding"</span>);</div><div class="line"><a name="l05909"></a><span class="lineno"> 5909</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l05910"></a><span class="lineno"> 5910</span>  }</div><div class="line"><a name="l05911"></a><span class="lineno"> 5911</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(</div><div class="line"><a name="l05912"></a><span class="lineno"> 5912</span>  <span class="stringliteral">"variables: only used in objective and in full encoding"</span>);</div><div class="line"><a name="l05913"></a><span class="lineno"> 5913</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l05914"></a><span class="lineno"> 5914</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"variables: only used in full encoding"</span>);</div><div class="line"><a name="l05915"></a><span class="lineno"> 5915</span>  }</div><div class="line"><a name="l05916"></a><span class="lineno"> 5916</span> </div><div class="line"><a name="l05917"></a><span class="lineno"> 5917</span>  <span class="comment">// Move the encoding constraints to the mapping model. Note that only the</span></div><div class="line"><a name="l05918"></a><span class="lineno"> 5918</span>  <span class="comment">// equality constraint are needed. In fact if we add the other ones, our</span></div><div class="line"><a name="l05919"></a><span class="lineno"> 5919</span>  <span class="comment">// current limited postsolve code will not work.</span></div><div class="line"><a name="l05920"></a><span class="lineno"> 5920</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> c : equality_constraints) {</div><div class="line"><a name="l05921"></a><span class="lineno"> 5921</span>  *context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a4b3b9ef9c5f214dd4427daa2646eceda">mapping_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>() =</div><div class="line"><a name="l05922"></a><span class="lineno"> 5922</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#afce66afa8ae7776a449bba7313ea3559">constraints</a>(c);</div><div class="line"><a name="l05923"></a><span class="lineno"> 5923</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a9b3e1bc8b76ea7d2614fd7ec2b066039">mutable_constraints</a>(c)-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#aa0d2b6ddea7cb960b90423ac48f555bf">Clear</a>();</div><div class="line"><a name="l05924"></a><span class="lineno"> 5924</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab75a27c0aeda2de9c3957719b8196c36">UpdateConstraintVariableUsage</a>(c);</div><div class="line"><a name="l05925"></a><span class="lineno"> 5925</span>  }</div><div class="line"><a name="l05926"></a><span class="lineno"> 5926</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> c : other_constraints) {</div><div class="line"><a name="l05927"></a><span class="lineno"> 5927</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a9b3e1bc8b76ea7d2614fd7ec2b066039">mutable_constraints</a>(c)-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#aa0d2b6ddea7cb960b90423ac48f555bf">Clear</a>();</div><div class="line"><a name="l05928"></a><span class="lineno"> 5928</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab75a27c0aeda2de9c3957719b8196c36">UpdateConstraintVariableUsage</a>(c);</div><div class="line"><a name="l05929"></a><span class="lineno"> 5929</span>  }</div><div class="line"><a name="l05930"></a><span class="lineno"> 5930</span> </div><div class="line"><a name="l05931"></a><span class="lineno"> 5931</span>  <span class="comment">// This must be done after we removed all the constraint containing var.</span></div><div class="line"><a name="l05932"></a><span class="lineno"> 5932</span>  ConstraintProto* new_ct = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>();</div><div class="line"><a name="l05933"></a><span class="lineno"> 5933</span>  std::sort(literals.begin(), literals.end()); <span class="comment">// For determinism.</span></div><div class="line"><a name="l05934"></a><span class="lineno"> 5934</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a> : literals) {</div><div class="line"><a name="l05935"></a><span class="lineno"> 5935</span>  new_ct-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ad5eff2987f39d596a4d7371961a92d42">mutable_exactly_one</a>()-><a class="code" href="classoperations__research_1_1sat_1_1_bool_argument_proto.html#a9abd20cd5c98c0a4535d168a1c7bb18e">add_literals</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>);</div><div class="line"><a name="l05936"></a><span class="lineno"> 5936</span>  }</div><div class="line"><a name="l05937"></a><span class="lineno"> 5937</span> </div><div class="line"><a name="l05938"></a><span class="lineno"> 5938</span>  <span class="comment">// In some cases there is duplicate literal, and we want to make sure</span></div><div class="line"><a name="l05939"></a><span class="lineno"> 5939</span>  <span class="comment">// this is presolved.</span></div><div class="line"><a name="l05940"></a><span class="lineno"> 5940</span>  PresolveExactlyOne(new_ct);</div><div class="line"><a name="l05941"></a><span class="lineno"> 5941</span> </div><div class="line"><a name="l05942"></a><span class="lineno"> 5942</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l05943"></a><span class="lineno"> 5943</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a6939dc7b9db01cf3deff10405e260461">MarkVariableAsRemoved</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l05944"></a><span class="lineno"> 5944</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l05945"></a><span class="lineno"> 5945</span>  }</div><div class="line"><a name="l05946"></a><span class="lineno"> 5946</span>  }</div><div class="line"><a name="l05947"></a><span class="lineno"> 5947</span> </div><div class="line"><a name="l05948"></a><span class="lineno"> 5948</span>  <span class="comment">// Special case: if a literal l appear in exactly two constraints:</span></div><div class="line"><a name="l05949"></a><span class="lineno"> 5949</span>  <span class="comment">// - l => var in domain1</span></div><div class="line"><a name="l05950"></a><span class="lineno"> 5950</span>  <span class="comment">// - not(l) => var in domain2</span></div><div class="line"><a name="l05951"></a><span class="lineno"> 5951</span>  <span class="comment">// then we know that domain(var) is included in domain1 U domain2,</span></div><div class="line"><a name="l05952"></a><span class="lineno"> 5952</span>  <span class="comment">// and that the literal l can be removed (and determined at postsolve).</span></div><div class="line"><a name="l05953"></a><span class="lineno"> 5953</span>  <span class="comment">//</span></div><div class="line"><a name="l05954"></a><span class="lineno"> 5954</span>  <span class="comment">// TODO(user): This could be generalized further to linear of size > 1 if for</span></div><div class="line"><a name="l05955"></a><span class="lineno"> 5955</span>  <span class="comment">// example the terms are the same.</span></div><div class="line"><a name="l05956"></a><span class="lineno"> 5956</span>  <span class="comment">//</span></div><div class="line"><a name="l05957"></a><span class="lineno"> 5957</span>  <span class="comment">// We wait for the model expansion to take place in order to avoid removing</span></div><div class="line"><a name="l05958"></a><span class="lineno"> 5958</span>  <span class="comment">// encoding that will later be re-created during expansion.</span></div><div class="line"><a name="l05959"></a><span class="lineno"> 5959</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a13c8d5cf71bf7735663c489f5493d036">ModelIsExpanded</a>() && context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af188bac2776d4545aab9405f5c801cd8">CanBeUsedAsLiteral</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) &&</div><div class="line"><a name="l05960"></a><span class="lineno"> 5960</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a0000c1621c1de75511d17c9d14aae0e8">VariableIsRemovable</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) &&</div><div class="line"><a name="l05961"></a><span class="lineno"> 5961</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#acf72cafd3dab9ac4b5e5b1a3aaa75192">VarToConstraints</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>).size() == 2) {</div><div class="line"><a name="l05962"></a><span class="lineno"> 5962</span>  <span class="keywordtype">bool</span> abort = <span class="keyword">false</span>;</div><div class="line"><a name="l05963"></a><span class="lineno"> 5963</span>  <span class="keywordtype">int</span> ct_var = -1;</div><div class="line"><a name="l05964"></a><span class="lineno"> 5964</span>  Domain union_of_domain;</div><div class="line"><a name="l05965"></a><span class="lineno"> 5965</span>  <span class="keywordtype">int</span> num_positive = 0;</div><div class="line"><a name="l05966"></a><span class="lineno"> 5966</span>  std::vector<int> constraint_indices_to_remove;</div><div class="line"><a name="l05967"></a><span class="lineno"> 5967</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> c : context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#acf72cafd3dab9ac4b5e5b1a3aaa75192">VarToConstraints</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) {</div><div class="line"><a name="l05968"></a><span class="lineno"> 5968</span>  <span class="keywordflow">if</span> (c < 0) {</div><div class="line"><a name="l05969"></a><span class="lineno"> 5969</span>  abort = <span class="keyword">true</span>;</div><div class="line"><a name="l05970"></a><span class="lineno"> 5970</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l05971"></a><span class="lineno"> 5971</span>  }</div><div class="line"><a name="l05972"></a><span class="lineno"> 5972</span>  constraint_indices_to_remove.push_back(c);</div><div class="line"><a name="l05973"></a><span class="lineno"> 5973</span>  <span class="keyword">const</span> ConstraintProto& <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a> = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#afce66afa8ae7776a449bba7313ea3559">constraints</a>(c);</div><div class="line"><a name="l05974"></a><span class="lineno"> 5974</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.enforcement_literal().size() != 1 ||</div><div class="line"><a name="l05975"></a><span class="lineno"> 5975</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.enforcement_literal(0)) != <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> ||</div><div class="line"><a name="l05976"></a><span class="lineno"> 5976</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.constraint_case() != <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35ac188c019178783e5be55110601309d7d">ConstraintProto::kLinear</a> ||</div><div class="line"><a name="l05977"></a><span class="lineno"> 5977</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.linear().vars().size() != 1) {</div><div class="line"><a name="l05978"></a><span class="lineno"> 5978</span>  abort = <span class="keyword">true</span>;</div><div class="line"><a name="l05979"></a><span class="lineno"> 5979</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l05980"></a><span class="lineno"> 5980</span>  }</div><div class="line"><a name="l05981"></a><span class="lineno"> 5981</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.enforcement_literal(0) == <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) ++num_positive;</div><div class="line"><a name="l05982"></a><span class="lineno"> 5982</span>  <span class="keywordflow">if</span> (ct_var != -1 && <a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.linear().vars(0)) != ct_var) {</div><div class="line"><a name="l05983"></a><span class="lineno"> 5983</span>  abort = <span class="keyword">true</span>;</div><div class="line"><a name="l05984"></a><span class="lineno"> 5984</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l05985"></a><span class="lineno"> 5985</span>  }</div><div class="line"><a name="l05986"></a><span class="lineno"> 5986</span>  ct_var = <a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.linear().vars(0));</div><div class="line"><a name="l05987"></a><span class="lineno"> 5987</span>  union_of_domain = union_of_domain.UnionWith(</div><div class="line"><a name="l05988"></a><span class="lineno"> 5988</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#ab1240060466ba48a36a4b36379bce26a">ReadDomainFromProto</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.linear())</div><div class="line"><a name="l05989"></a><span class="lineno"> 5989</span>  .InverseMultiplicationBy(<a class="code" href="namespaceoperations__research_1_1sat.html#a217338425de4389014563f1f24331713">RefIsPositive</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.linear().vars(0))</div><div class="line"><a name="l05990"></a><span class="lineno"> 5990</span>  ? <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.linear().coeffs(0)</div><div class="line"><a name="l05991"></a><span class="lineno"> 5991</span>  : -<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.linear().coeffs(0)));</div><div class="line"><a name="l05992"></a><span class="lineno"> 5992</span>  }</div><div class="line"><a name="l05993"></a><span class="lineno"> 5993</span>  <span class="keywordflow">if</span> (!abort && num_positive == 1) {</div><div class="line"><a name="l05994"></a><span class="lineno"> 5994</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(ct_var, union_of_domain)) {</div><div class="line"><a name="l05995"></a><span class="lineno"> 5995</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l05996"></a><span class="lineno"> 5996</span>  }</div><div class="line"><a name="l05997"></a><span class="lineno"> 5997</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"variables: removable enforcement literal"</span>);</div><div class="line"><a name="l05998"></a><span class="lineno"> 5998</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> c : constraint_indices_to_remove) {</div><div class="line"><a name="l05999"></a><span class="lineno"> 5999</span>  *context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a4b3b9ef9c5f214dd4427daa2646eceda">mapping_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>() =</div><div class="line"><a name="l06000"></a><span class="lineno"> 6000</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#afce66afa8ae7776a449bba7313ea3559">constraints</a>(c);</div><div class="line"><a name="l06001"></a><span class="lineno"> 6001</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a4b3b9ef9c5f214dd4427daa2646eceda">mapping_model</a></div><div class="line"><a name="l06002"></a><span class="lineno"> 6002</span>  -><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a9b3e1bc8b76ea7d2614fd7ec2b066039">mutable_constraints</a>(</div><div class="line"><a name="l06003"></a><span class="lineno"> 6003</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a4b3b9ef9c5f214dd4427daa2646eceda">mapping_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#afce66afa8ae7776a449bba7313ea3559">constraints</a>().size() - 1)</div><div class="line"><a name="l06004"></a><span class="lineno"> 6004</span>  ->set_name(<span class="stringliteral">"here"</span>);</div><div class="line"><a name="l06005"></a><span class="lineno"> 6005</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a9b3e1bc8b76ea7d2614fd7ec2b066039">mutable_constraints</a>(c)-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#aa0d2b6ddea7cb960b90423ac48f555bf">Clear</a>();</div><div class="line"><a name="l06006"></a><span class="lineno"> 6006</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab75a27c0aeda2de9c3957719b8196c36">UpdateConstraintVariableUsage</a>(c);</div><div class="line"><a name="l06007"></a><span class="lineno"> 6007</span>  }</div><div class="line"><a name="l06008"></a><span class="lineno"> 6008</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a6939dc7b9db01cf3deff10405e260461">MarkVariableAsRemoved</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l06009"></a><span class="lineno"> 6009</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l06010"></a><span class="lineno"> 6010</span>  }</div><div class="line"><a name="l06011"></a><span class="lineno"> 6011</span>  }</div><div class="line"><a name="l06012"></a><span class="lineno"> 6012</span> </div><div class="line"><a name="l06013"></a><span class="lineno"> 6013</span>  <span class="comment">// Only process discrete domain.</span></div><div class="line"><a name="l06014"></a><span class="lineno"> 6014</span>  <span class="keyword">const</span> Domain& domain = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l06015"></a><span class="lineno"> 6015</span> </div><div class="line"><a name="l06016"></a><span class="lineno"> 6016</span>  <span class="comment">// Special case for non-Boolean domain of size 2.</span></div><div class="line"><a name="l06017"></a><span class="lineno"> 6017</span>  <span class="keywordflow">if</span> (domain.Size() == 2 && (domain.Min() != 0 || domain.Max() != 1)) {</div><div class="line"><a name="l06018"></a><span class="lineno"> 6018</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a7ea7bb314db4dbe4f3b2cac16a2af20f">CanonicalizeDomainOfSizeTwo</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l06019"></a><span class="lineno"> 6019</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l06020"></a><span class="lineno"> 6020</span>  }</div><div class="line"><a name="l06021"></a><span class="lineno"> 6021</span> </div><div class="line"><a name="l06022"></a><span class="lineno"> 6022</span>  <span class="keywordflow">if</span> (domain.NumIntervals() != domain.Size()) <span class="keywordflow">return</span>;</div><div class="line"><a name="l06023"></a><span class="lineno"> 6023</span> </div><div class="line"><a name="l06024"></a><span class="lineno"> 6024</span>  <span class="keyword">const</span> int64_t var_min = domain.Min();</div><div class="line"><a name="l06025"></a><span class="lineno"> 6025</span>  int64_t gcd = domain[1].start - var_min;</div><div class="line"><a name="l06026"></a><span class="lineno"> 6026</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> <a class="code" href="pack_8cc.html#a750b5d744c39a06bfb13e6eb010e35d0">index</a> = 2; <a class="code" href="pack_8cc.html#a750b5d744c39a06bfb13e6eb010e35d0">index</a> < domain.NumIntervals(); ++<a class="code" href="pack_8cc.html#a750b5d744c39a06bfb13e6eb010e35d0">index</a>) {</div><div class="line"><a name="l06027"></a><span class="lineno"> 6027</span>  <span class="keyword">const</span> ClosedInterval& i = domain[<a class="code" href="pack_8cc.html#a750b5d744c39a06bfb13e6eb010e35d0">index</a>];</div><div class="line"><a name="l06028"></a><span class="lineno"> 6028</span>  <a class="code" href="base_2logging_8h.html#ae89df3243bbb8341130c7b3f44145ea0">DCHECK_EQ</a>(i.start, i.end);</div><div class="line"><a name="l06029"></a><span class="lineno"> 6029</span>  <span class="keyword">const</span> int64_t shifted_value = i.start - var_min;</div><div class="line"><a name="l06030"></a><span class="lineno"> 6030</span>  <a class="code" href="base_2logging_8h.html#ab4f56aa24c4c9cddc47a6abd2d747f9a">DCHECK_GT</a>(shifted_value, 0);</div><div class="line"><a name="l06031"></a><span class="lineno"> 6031</span> </div><div class="line"><a name="l06032"></a><span class="lineno"> 6032</span>  gcd = <a class="code" href="classoperations__research_1_1_math_util.html#ae94db7b2fa1d8e1b3c1dc6c683191609">MathUtil::GCD64</a>(gcd, shifted_value);</div><div class="line"><a name="l06033"></a><span class="lineno"> 6033</span>  <span class="keywordflow">if</span> (gcd == 1) <span class="keywordflow">break</span>;</div><div class="line"><a name="l06034"></a><span class="lineno"> 6034</span>  }</div><div class="line"><a name="l06035"></a><span class="lineno"> 6035</span>  <span class="keywordflow">if</span> (gcd == 1) <span class="keywordflow">return</span>;</div><div class="line"><a name="l06036"></a><span class="lineno"> 6036</span> </div><div class="line"><a name="l06037"></a><span class="lineno"> 6037</span>  <span class="keywordtype">int</span> new_var_index;</div><div class="line"><a name="l06038"></a><span class="lineno"> 6038</span>  {</div><div class="line"><a name="l06039"></a><span class="lineno"> 6039</span>  std::vector<int64_t> scaled_values;</div><div class="line"><a name="l06040"></a><span class="lineno"> 6040</span>  scaled_values.reserve(domain.NumIntervals());</div><div class="line"><a name="l06041"></a><span class="lineno"> 6041</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> ClosedInterval i : domain) {</div><div class="line"><a name="l06042"></a><span class="lineno"> 6042</span>  <a class="code" href="base_2logging_8h.html#ae89df3243bbb8341130c7b3f44145ea0">DCHECK_EQ</a>(i.start, i.end);</div><div class="line"><a name="l06043"></a><span class="lineno"> 6043</span>  <span class="keyword">const</span> int64_t shifted_value = i.start - var_min;</div><div class="line"><a name="l06044"></a><span class="lineno"> 6044</span>  scaled_values.push_back(shifted_value / gcd);</div><div class="line"><a name="l06045"></a><span class="lineno"> 6045</span>  }</div><div class="line"><a name="l06046"></a><span class="lineno"> 6046</span>  new_var_index = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a67699a1a5830ef51dab6941449b02044">NewIntVar</a>(<a class="code" href="classoperations__research_1_1_domain.html#ac2d88de67793063ad5f5e923ffd1c0eb">Domain::FromValues</a>(scaled_values));</div><div class="line"><a name="l06047"></a><span class="lineno"> 6047</span>  }</div><div class="line"><a name="l06048"></a><span class="lineno"> 6048</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span>;</div><div class="line"><a name="l06049"></a><span class="lineno"> 6049</span> </div><div class="line"><a name="l06050"></a><span class="lineno"> 6050</span>  <a class="code" href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a>(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a3999a4ff1f53b54b40c8cd396105572a">StoreAffineRelation</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>, new_var_index, gcd, var_min));</div><div class="line"><a name="l06051"></a><span class="lineno"> 6051</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"variables: canonicalize affine domain"</span>);</div><div class="line"><a name="l06052"></a><span class="lineno"> 6052</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l06053"></a><span class="lineno"> 6053</span> }</div><div class="line"><a name="l06054"></a><span class="lineno"> 6054</span> </div><div class="line"><a name="l06055"></a><span class="lineno"> 6055</span> <span class="comment">// Adds all affine relations to our model for the variables that are still used.</span></div><div class="line"><a name="l06056"></a><span class="lineno"> 6056</span> <span class="keywordtype">void</span> CpModelPresolver::EncodeAllAffineRelations() {</div><div class="line"><a name="l06057"></a><span class="lineno"> 6057</span>  int64_t num_added = 0;</div><div class="line"><a name="l06058"></a><span class="lineno"> 6058</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = 0; <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> < context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#abef5f55c3278c137faca92b8e433f8ea">variables_size</a>(); ++<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) {</div><div class="line"><a name="l06059"></a><span class="lineno"> 6059</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#abb6eb29f56c3a33b8ae1b74b08b755c2">IsFixed</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l06060"></a><span class="lineno"> 6060</span> </div><div class="line"><a name="l06061"></a><span class="lineno"> 6061</span>  <span class="keyword">const</span> AffineRelation::Relation r = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aaddc5f58e8a40a5a308531949153f814">GetAffineRelation</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l06062"></a><span class="lineno"> 6062</span>  <span class="keywordflow">if</span> (r.representative == <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l06063"></a><span class="lineno"> 6063</span> </div><div class="line"><a name="l06064"></a><span class="lineno"> 6064</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab7b13b808e3dea6fc1e4006f7134e9f9">keep_all_feasible_solutions</a>) {</div><div class="line"><a name="l06065"></a><span class="lineno"> 6065</span>  <span class="comment">// TODO(user): It seems some affine relation are still removable at this</span></div><div class="line"><a name="l06066"></a><span class="lineno"> 6066</span>  <span class="comment">// stage even though they should be removed inside PresolveToFixPoint().</span></div><div class="line"><a name="l06067"></a><span class="lineno"> 6067</span>  <span class="comment">// Investigate. For now, we just remove such relations.</span></div><div class="line"><a name="l06068"></a><span class="lineno"> 6068</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab246112417bad87cb948820e304208ab">VariableIsNotUsedAnymore</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l06069"></a><span class="lineno"> 6069</span>  <span class="keywordflow">if</span> (!PresolveAffineRelationIfAny(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) <span class="keywordflow">break</span>;</div><div class="line"><a name="l06070"></a><span class="lineno"> 6070</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab246112417bad87cb948820e304208ab">VariableIsNotUsedAnymore</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l06071"></a><span class="lineno"> 6071</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#abb6eb29f56c3a33b8ae1b74b08b755c2">IsFixed</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l06072"></a><span class="lineno"> 6072</span>  }</div><div class="line"><a name="l06073"></a><span class="lineno"> 6073</span> </div><div class="line"><a name="l06074"></a><span class="lineno"> 6074</span>  ++num_added;</div><div class="line"><a name="l06075"></a><span class="lineno"> 6075</span>  ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a> = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>();</div><div class="line"><a name="l06076"></a><span class="lineno"> 6076</span>  <span class="keyword">auto</span>* arg = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_linear();</div><div class="line"><a name="l06077"></a><span class="lineno"> 6077</span>  arg->add_vars(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l06078"></a><span class="lineno"> 6078</span>  arg->add_coeffs(1);</div><div class="line"><a name="l06079"></a><span class="lineno"> 6079</span>  arg->add_vars(r.representative);</div><div class="line"><a name="l06080"></a><span class="lineno"> 6080</span>  arg->add_coeffs(-r.coeff);</div><div class="line"><a name="l06081"></a><span class="lineno"> 6081</span>  arg->add_domain(r.offset);</div><div class="line"><a name="l06082"></a><span class="lineno"> 6082</span>  arg->add_domain(r.offset);</div><div class="line"><a name="l06083"></a><span class="lineno"> 6083</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l06084"></a><span class="lineno"> 6084</span>  }</div><div class="line"><a name="l06085"></a><span class="lineno"> 6085</span> </div><div class="line"><a name="l06086"></a><span class="lineno"> 6086</span>  <span class="comment">// Now that we encoded all remaining affine relation with constraints, we</span></div><div class="line"><a name="l06087"></a><span class="lineno"> 6087</span>  <span class="comment">// remove the special marker to have a proper constraint variable graph.</span></div><div class="line"><a name="l06088"></a><span class="lineno"> 6088</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aabb328e6969888226a7a69a972e22c56">RemoveAllVariablesFromAffineRelationConstraint</a>();</div><div class="line"><a name="l06089"></a><span class="lineno"> 6089</span> </div><div class="line"><a name="l06090"></a><span class="lineno"> 6090</span>  <span class="keywordflow">if</span> (num_added > 0) {</div><div class="line"><a name="l06091"></a><span class="lineno"> 6091</span>  <a class="code" href="util_2logging_8h.html#a5f67b653dd99ddbe5e3367e3b4b7b532">SOLVER_LOG</a>(logger_, num_added, <span class="stringliteral">" affine relations still in the model."</span>);</div><div class="line"><a name="l06092"></a><span class="lineno"> 6092</span>  }</div><div class="line"><a name="l06093"></a><span class="lineno"> 6093</span> }</div><div class="line"><a name="l06094"></a><span class="lineno"> 6094</span> </div><div class="line"><a name="l06095"></a><span class="lineno"> 6095</span> <span class="comment">// Presolve a variable in relation with its representative.</span></div><div class="line"><a name="l06096"></a><span class="lineno"> 6096</span> <span class="keywordtype">bool</span> CpModelPresolver::PresolveAffineRelationIfAny(<span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) {</div><div class="line"><a name="l06097"></a><span class="lineno"> 6097</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab246112417bad87cb948820e304208ab">VariableIsNotUsedAnymore</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l06098"></a><span class="lineno"> 6098</span> </div><div class="line"><a name="l06099"></a><span class="lineno"> 6099</span>  <span class="keyword">const</span> AffineRelation::Relation r = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aaddc5f58e8a40a5a308531949153f814">GetAffineRelation</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l06100"></a><span class="lineno"> 6100</span>  <span class="keywordflow">if</span> (r.representative == <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l06101"></a><span class="lineno"> 6101</span> </div><div class="line"><a name="l06102"></a><span class="lineno"> 6102</span>  <span class="comment">// Propagate domains.</span></div><div class="line"><a name="l06103"></a><span class="lineno"> 6103</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5c2f01871b9baa2bc0dc556803c5a1ad">PropagateAffineRelation</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l06104"></a><span class="lineno"> 6104</span> </div><div class="line"><a name="l06105"></a><span class="lineno"> 6105</span>  <span class="comment">// Once an affine relation is detected, the variables should be added to</span></div><div class="line"><a name="l06106"></a><span class="lineno"> 6106</span>  <span class="comment">// the kAffineRelationConstraint. The only way to be unmarked is if the</span></div><div class="line"><a name="l06107"></a><span class="lineno"> 6107</span>  <span class="comment">// variable do not appear in any other constraint and is not a representative,</span></div><div class="line"><a name="l06108"></a><span class="lineno"> 6108</span>  <span class="comment">// in which case it should never be added back.</span></div><div class="line"><a name="l06109"></a><span class="lineno"> 6109</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#abb6eb29f56c3a33b8ae1b74b08b755c2">IsFixed</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l06110"></a><span class="lineno"> 6110</span>  <a class="code" href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a>(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#acf72cafd3dab9ac4b5e5b1a3aaa75192">VarToConstraints</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>).contains(<a class="code" href="namespaceoperations__research_1_1sat.html#a55963ffe87280b37dce97b9a8cbd03ae">kAffineRelationConstraint</a>));</div><div class="line"><a name="l06111"></a><span class="lineno"> 6111</span>  <a class="code" href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a>(!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab246112417bad87cb948820e304208ab">VariableIsNotUsedAnymore</a>(r.representative));</div><div class="line"><a name="l06112"></a><span class="lineno"> 6112</span> </div><div class="line"><a name="l06113"></a><span class="lineno"> 6113</span>  <span class="comment">// If var is no longer used, remove. Note that we can always do that since we</span></div><div class="line"><a name="l06114"></a><span class="lineno"> 6114</span>  <span class="comment">// propagated the domain above and so we can find a feasible value for a for</span></div><div class="line"><a name="l06115"></a><span class="lineno"> 6115</span>  <span class="comment">// any value of the representative.</span></div><div class="line"><a name="l06116"></a><span class="lineno"> 6116</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a54cf7f0077717d59a828b656b60c1615">VariableIsUniqueAndRemovable</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) {</div><div class="line"><a name="l06117"></a><span class="lineno"> 6117</span>  <span class="comment">// Add relation with current representative to the mapping model.</span></div><div class="line"><a name="l06118"></a><span class="lineno"> 6118</span>  ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a> = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a4b3b9ef9c5f214dd4427daa2646eceda">mapping_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>();</div><div class="line"><a name="l06119"></a><span class="lineno"> 6119</span>  <span class="keyword">auto</span>* arg = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->mutable_linear();</div><div class="line"><a name="l06120"></a><span class="lineno"> 6120</span>  arg->add_vars(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l06121"></a><span class="lineno"> 6121</span>  arg->add_coeffs(1);</div><div class="line"><a name="l06122"></a><span class="lineno"> 6122</span>  arg->add_vars(r.representative);</div><div class="line"><a name="l06123"></a><span class="lineno"> 6123</span>  arg->add_coeffs(-r.coeff);</div><div class="line"><a name="l06124"></a><span class="lineno"> 6124</span>  arg->add_domain(r.offset);</div><div class="line"><a name="l06125"></a><span class="lineno"> 6125</span>  arg->add_domain(r.offset);</div><div class="line"><a name="l06126"></a><span class="lineno"> 6126</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5763f8709716596a3aa728bacae05a7b">RemoveVariableFromAffineRelation</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l06127"></a><span class="lineno"> 6127</span>  }</div><div class="line"><a name="l06128"></a><span class="lineno"> 6128</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l06129"></a><span class="lineno"> 6129</span> }</div><div class="line"><a name="l06130"></a><span class="lineno"> 6130</span> </div><div class="line"><a name="l06131"></a><span class="lineno"> 6131</span> <span class="keywordtype">void</span> CpModelPresolver::PresolveToFixPoint() {</div><div class="line"><a name="l06132"></a><span class="lineno"> 6132</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span>;</div><div class="line"><a name="l06133"></a><span class="lineno"> 6133</span> </div><div class="line"><a name="l06134"></a><span class="lineno"> 6134</span>  <span class="comment">// Limit on number of operations.</span></div><div class="line"><a name="l06135"></a><span class="lineno"> 6135</span>  <span class="keyword">const</span> int64_t max_num_operations =</div><div class="line"><a name="l06136"></a><span class="lineno"> 6136</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aaabb604ccac4a6136be93bfe64e2290d">params</a>().<a class="code" href="classoperations__research_1_1sat_1_1_sat_parameters.html#a2f15d39b7362c11567a19e4eb2ada7cb">cp_model_max_num_presolve_operations</a>() > 0</div><div class="line"><a name="l06137"></a><span class="lineno"> 6137</span>  ? context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aaabb604ccac4a6136be93bfe64e2290d">params</a>().<a class="code" href="classoperations__research_1_1sat_1_1_sat_parameters.html#a2f15d39b7362c11567a19e4eb2ada7cb">cp_model_max_num_presolve_operations</a>()</div><div class="line"><a name="l06138"></a><span class="lineno"> 6138</span>  : <a class="code" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::numeric_limits<int64_t>::max</a>();</div><div class="line"><a name="l06139"></a><span class="lineno"> 6139</span> </div><div class="line"><a name="l06140"></a><span class="lineno"> 6140</span>  <span class="comment">// This is used for constraint having unique variables in them (i.e. not</span></div><div class="line"><a name="l06141"></a><span class="lineno"> 6141</span>  <span class="comment">// appearing anywhere else) to not call the presolve more than once for this</span></div><div class="line"><a name="l06142"></a><span class="lineno"> 6142</span>  <span class="comment">// reason.</span></div><div class="line"><a name="l06143"></a><span class="lineno"> 6143</span>  absl::flat_hash_set<std::pair<int, int>> var_constraint_pair_already_called;</div><div class="line"><a name="l06144"></a><span class="lineno"> 6144</span> </div><div class="line"><a name="l06145"></a><span class="lineno"> 6145</span>  TimeLimit* <a class="code" href="cp__model__solver_8cc.html#aec8af5c1be4e1b6d4330e1161028de21">time_limit</a> = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a0704cc50211ab739309aa9f54aa8c606">time_limit</a>();</div><div class="line"><a name="l06146"></a><span class="lineno"> 6146</span> </div><div class="line"><a name="l06147"></a><span class="lineno"> 6147</span>  <span class="comment">// The queue of "active" constraints, initialized to the non-empty ones.</span></div><div class="line"><a name="l06148"></a><span class="lineno"> 6148</span>  std::vector<bool> in_queue(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#aeaf0da781ca9b370d96b7fbd3f74266a">constraints_size</a>(),</div><div class="line"><a name="l06149"></a><span class="lineno"> 6149</span>  <span class="keyword">false</span>);</div><div class="line"><a name="l06150"></a><span class="lineno"> 6150</span>  std::deque<int> queue;</div><div class="line"><a name="l06151"></a><span class="lineno"> 6151</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> c = 0; c < in_queue.size(); ++c) {</div><div class="line"><a name="l06152"></a><span class="lineno"> 6152</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#afce66afa8ae7776a449bba7313ea3559">constraints</a>(c).<a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a5f9869899e2c94786f9709684f1ecc56">constraint_case</a>() !=</div><div class="line"><a name="l06153"></a><span class="lineno"> 6153</span>  ConstraintProto::ConstraintCase::CONSTRAINT_NOT_SET) {</div><div class="line"><a name="l06154"></a><span class="lineno"> 6154</span>  in_queue[c] = <span class="keyword">true</span>;</div><div class="line"><a name="l06155"></a><span class="lineno"> 6155</span>  queue.push_back(c);</div><div class="line"><a name="l06156"></a><span class="lineno"> 6156</span>  }</div><div class="line"><a name="l06157"></a><span class="lineno"> 6157</span>  }</div><div class="line"><a name="l06158"></a><span class="lineno"> 6158</span> </div><div class="line"><a name="l06159"></a><span class="lineno"> 6159</span>  <span class="comment">// When thinking about how the presolve works, it seems like a good idea to</span></div><div class="line"><a name="l06160"></a><span class="lineno"> 6160</span>  <span class="comment">// process the "simple" constraints first in order to be more efficient.</span></div><div class="line"><a name="l06161"></a><span class="lineno"> 6161</span>  <span class="comment">// In September 2019, experiment on the flatzinc problems shows no changes in</span></div><div class="line"><a name="l06162"></a><span class="lineno"> 6162</span>  <span class="comment">// the results. We should actually count the number of rules triggered.</span></div><div class="line"><a name="l06163"></a><span class="lineno"> 6163</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aaabb604ccac4a6136be93bfe64e2290d">params</a>().<a class="code" href="classoperations__research_1_1sat_1_1_sat_parameters.html#a2324e123d8d953202a627aef20ccd7ac">permute_presolve_constraint_order</a>()) {</div><div class="line"><a name="l06164"></a><span class="lineno"> 6164</span>  std::shuffle(queue.begin(), queue.end(), *context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ad02c7812cfbc2a8c4c05d955c9681259">random</a>());</div><div class="line"><a name="l06165"></a><span class="lineno"> 6165</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l06166"></a><span class="lineno"> 6166</span>  std::sort(queue.begin(), queue.end(), [<span class="keyword">this</span>](<span class="keywordtype">int</span> <a class="code" href="constraint__solver_2table_8cc.html#acb18315d548212835cd8ed4287e6c0b6">a</a>, <span class="keywordtype">int</span> <a class="code" href="constraint__solver_2table_8cc.html#a9293e4d29cac928301645070dd307683">b</a>) {</div><div class="line"><a name="l06167"></a><span class="lineno"> 6167</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> score_a = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a4d724b2f4bd1d1cab7b11dafd3448d8b">ConstraintToVars</a>(<a class="code" href="constraint__solver_2table_8cc.html#acb18315d548212835cd8ed4287e6c0b6">a</a>).size();</div><div class="line"><a name="l06168"></a><span class="lineno"> 6168</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> score_b = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a4d724b2f4bd1d1cab7b11dafd3448d8b">ConstraintToVars</a>(<a class="code" href="constraint__solver_2table_8cc.html#a9293e4d29cac928301645070dd307683">b</a>).size();</div><div class="line"><a name="l06169"></a><span class="lineno"> 6169</span>  <span class="keywordflow">return</span> score_a < score_b || (score_a == score_b && <a class="code" href="constraint__solver_2table_8cc.html#acb18315d548212835cd8ed4287e6c0b6">a</a> < <a class="code" href="constraint__solver_2table_8cc.html#a9293e4d29cac928301645070dd307683">b</a>);</div><div class="line"><a name="l06170"></a><span class="lineno"> 6170</span>  });</div><div class="line"><a name="l06171"></a><span class="lineno"> 6171</span>  }</div><div class="line"><a name="l06172"></a><span class="lineno"> 6172</span> </div><div class="line"><a name="l06173"></a><span class="lineno"> 6173</span>  <span class="keywordflow">while</span> (!queue.empty() && !context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) {</div><div class="line"><a name="l06174"></a><span class="lineno"> 6174</span>  <span class="keywordflow">if</span> (<a class="code" href="cp__model__solver_8cc.html#aec8af5c1be4e1b6d4330e1161028de21">time_limit</a>->LimitReached()) <span class="keywordflow">break</span>;</div><div class="line"><a name="l06175"></a><span class="lineno"> 6175</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5f9c1ea2555cc36fcd716296e54ed17a">num_presolve_operations</a> > max_num_operations) <span class="keywordflow">break</span>;</div><div class="line"><a name="l06176"></a><span class="lineno"> 6176</span>  <span class="keywordflow">while</span> (!queue.empty() && !context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) {</div><div class="line"><a name="l06177"></a><span class="lineno"> 6177</span>  <span class="keywordflow">if</span> (<a class="code" href="cp__model__solver_8cc.html#aec8af5c1be4e1b6d4330e1161028de21">time_limit</a>->LimitReached()) <span class="keywordflow">break</span>;</div><div class="line"><a name="l06178"></a><span class="lineno"> 6178</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5f9c1ea2555cc36fcd716296e54ed17a">num_presolve_operations</a> > max_num_operations) <span class="keywordflow">break</span>;</div><div class="line"><a name="l06179"></a><span class="lineno"> 6179</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> c = queue.front();</div><div class="line"><a name="l06180"></a><span class="lineno"> 6180</span>  in_queue[c] = <span class="keyword">false</span>;</div><div class="line"><a name="l06181"></a><span class="lineno"> 6181</span>  queue.pop_front();</div><div class="line"><a name="l06182"></a><span class="lineno"> 6182</span> </div><div class="line"><a name="l06183"></a><span class="lineno"> 6183</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> old_num_constraint =</div><div class="line"><a name="l06184"></a><span class="lineno"> 6184</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#aeaf0da781ca9b370d96b7fbd3f74266a">constraints_size</a>();</div><div class="line"><a name="l06185"></a><span class="lineno"> 6185</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> changed = <a class="code" href="classoperations__research_1_1sat_1_1_cp_model_presolver.html#ab37522044009144ac6eff3b3d4c1d271">PresolveOneConstraint</a>(c);</div><div class="line"><a name="l06186"></a><span class="lineno"> 6186</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) {</div><div class="line"><a name="l06187"></a><span class="lineno"> 6187</span>  <a class="code" href="util_2logging_8h.html#a5f67b653dd99ddbe5e3367e3b4b7b532">SOLVER_LOG</a>(logger_, <span class="stringliteral">"Unsat after presolving constraint #"</span>, c,</div><div class="line"><a name="l06188"></a><span class="lineno"> 6188</span>  <span class="stringliteral">" (warning, dump might be inconsistent): "</span>,</div><div class="line"><a name="l06189"></a><span class="lineno"> 6189</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#afce66afa8ae7776a449bba7313ea3559">constraints</a>(c).ShortDebugString());</div><div class="line"><a name="l06190"></a><span class="lineno"> 6190</span>  }</div><div class="line"><a name="l06191"></a><span class="lineno"> 6191</span> </div><div class="line"><a name="l06192"></a><span class="lineno"> 6192</span>  <span class="comment">// Add to the queue any newly created constraints.</span></div><div class="line"><a name="l06193"></a><span class="lineno"> 6193</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> new_num_constraints =</div><div class="line"><a name="l06194"></a><span class="lineno"> 6194</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#aeaf0da781ca9b370d96b7fbd3f74266a">constraints_size</a>();</div><div class="line"><a name="l06195"></a><span class="lineno"> 6195</span>  <span class="keywordflow">if</span> (new_num_constraints > old_num_constraint) {</div><div class="line"><a name="l06196"></a><span class="lineno"> 6196</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l06197"></a><span class="lineno"> 6197</span>  in_queue.resize(new_num_constraints, <span class="keyword">true</span>);</div><div class="line"><a name="l06198"></a><span class="lineno"> 6198</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> c = old_num_constraint; c < new_num_constraints; ++c) {</div><div class="line"><a name="l06199"></a><span class="lineno"> 6199</span>  queue.push_back(c);</div><div class="line"><a name="l06200"></a><span class="lineno"> 6200</span>  }</div><div class="line"><a name="l06201"></a><span class="lineno"> 6201</span>  }</div><div class="line"><a name="l06202"></a><span class="lineno"> 6202</span> </div><div class="line"><a name="l06203"></a><span class="lineno"> 6203</span>  <span class="comment">// TODO(user): Is seems safer to simply remove the changed Boolean.</span></div><div class="line"><a name="l06204"></a><span class="lineno"> 6204</span>  <span class="comment">// We loose a bit of performance, but the code is simpler.</span></div><div class="line"><a name="l06205"></a><span class="lineno"> 6205</span>  <span class="keywordflow">if</span> (changed) {</div><div class="line"><a name="l06206"></a><span class="lineno"> 6206</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab75a27c0aeda2de9c3957719b8196c36">UpdateConstraintVariableUsage</a>(c);</div><div class="line"><a name="l06207"></a><span class="lineno"> 6207</span>  }</div><div class="line"><a name="l06208"></a><span class="lineno"> 6208</span>  }</div><div class="line"><a name="l06209"></a><span class="lineno"> 6209</span> </div><div class="line"><a name="l06210"></a><span class="lineno"> 6210</span>  <span class="comment">// This is needed to remove variable with a different representative from</span></div><div class="line"><a name="l06211"></a><span class="lineno"> 6211</span>  <span class="comment">// the objective. This allows to remove them completely in the loop below.</span></div><div class="line"><a name="l06212"></a><span class="lineno"> 6212</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span>;</div><div class="line"><a name="l06213"></a><span class="lineno"> 6213</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa62da782b2270ca293531a0aea153fba">CanonicalizeObjective</a>()) <span class="keywordflow">return</span>;</div><div class="line"><a name="l06214"></a><span class="lineno"> 6214</span> </div><div class="line"><a name="l06215"></a><span class="lineno"> 6215</span>  <span class="comment">// We also make sure all affine relations are propagated and any not</span></div><div class="line"><a name="l06216"></a><span class="lineno"> 6216</span>  <span class="comment">// yet canonicalized domain is.</span></div><div class="line"><a name="l06217"></a><span class="lineno"> 6217</span>  <span class="comment">//</span></div><div class="line"><a name="l06218"></a><span class="lineno"> 6218</span>  <span class="comment">// TODO(user): maybe we can avoid iterating over all variables, but then</span></div><div class="line"><a name="l06219"></a><span class="lineno"> 6219</span>  <span class="comment">// we already do that below.</span></div><div class="line"><a name="l06220"></a><span class="lineno"> 6220</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> current_num_variables = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#abef5f55c3278c137faca92b8e433f8ea">variables_size</a>();</div><div class="line"><a name="l06221"></a><span class="lineno"> 6221</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> v = 0; v < current_num_variables; ++v) {</div><div class="line"><a name="l06222"></a><span class="lineno"> 6222</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span>;</div><div class="line"><a name="l06223"></a><span class="lineno"> 6223</span>  <span class="keywordflow">if</span> (!PresolveAffineRelationIfAny(v)) <span class="keywordflow">return</span>;</div><div class="line"><a name="l06224"></a><span class="lineno"> 6224</span> </div><div class="line"><a name="l06225"></a><span class="lineno"> 6225</span>  <span class="comment">// Try to canonicalize the domain, note that we should have detected all</span></div><div class="line"><a name="l06226"></a><span class="lineno"> 6226</span>  <span class="comment">// affine relations before, so we don't recreate "canononical" variables</span></div><div class="line"><a name="l06227"></a><span class="lineno"> 6227</span>  <span class="comment">// if they already exist in the model.</span></div><div class="line"><a name="l06228"></a><span class="lineno"> 6228</span>  TryToSimplifyDomain(v);</div><div class="line"><a name="l06229"></a><span class="lineno"> 6229</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l06230"></a><span class="lineno"> 6230</span>  }</div><div class="line"><a name="l06231"></a><span class="lineno"> 6231</span> </div><div class="line"><a name="l06232"></a><span class="lineno"> 6232</span>  <span class="comment">// Re-add to the queue constraints that have unique variables. Note that to</span></div><div class="line"><a name="l06233"></a><span class="lineno"> 6233</span>  <span class="comment">// not enter an infinite loop, we call each (var, constraint) pair at most</span></div><div class="line"><a name="l06234"></a><span class="lineno"> 6234</span>  <span class="comment">// once.</span></div><div class="line"><a name="l06235"></a><span class="lineno"> 6235</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> num_vars = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#abef5f55c3278c137faca92b8e433f8ea">variables_size</a>();</div><div class="line"><a name="l06236"></a><span class="lineno"> 6236</span>  in_queue.resize(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#aeaf0da781ca9b370d96b7fbd3f74266a">constraints_size</a>(), <span class="keyword">false</span>);</div><div class="line"><a name="l06237"></a><span class="lineno"> 6237</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> v = 0; v < num_vars; ++v) {</div><div class="line"><a name="l06238"></a><span class="lineno"> 6238</span>  <span class="keyword">const</span> <span class="keyword">auto</span>& constraints = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#acf72cafd3dab9ac4b5e5b1a3aaa75192">VarToConstraints</a>(v);</div><div class="line"><a name="l06239"></a><span class="lineno"> 6239</span>  <span class="keywordflow">if</span> (constraints.size() != 1) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l06240"></a><span class="lineno"> 6240</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> c = *constraints.begin();</div><div class="line"><a name="l06241"></a><span class="lineno"> 6241</span>  <span class="keywordflow">if</span> (c < 0) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l06242"></a><span class="lineno"> 6242</span> </div><div class="line"><a name="l06243"></a><span class="lineno"> 6243</span>  <span class="comment">// Note that to avoid bad complexity in problem like a TSP with just one</span></div><div class="line"><a name="l06244"></a><span class="lineno"> 6244</span>  <span class="comment">// big constraint. we mark all the singleton variables of a constraint</span></div><div class="line"><a name="l06245"></a><span class="lineno"> 6245</span>  <span class="comment">// even if this constraint is already in the queue.</span></div><div class="line"><a name="l06246"></a><span class="lineno"> 6246</span>  <span class="keywordflow">if</span> (<a class="code" href="namespacegtl.html#aae28e97bd1fa93cb0032642550da7455">gtl::ContainsKey</a>(var_constraint_pair_already_called,</div><div class="line"><a name="l06247"></a><span class="lineno"> 6247</span>  std::pair<int, int>(v, c))) {</div><div class="line"><a name="l06248"></a><span class="lineno"> 6248</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l06249"></a><span class="lineno"> 6249</span>  }</div><div class="line"><a name="l06250"></a><span class="lineno"> 6250</span>  var_constraint_pair_already_called.insert({v, c});</div><div class="line"><a name="l06251"></a><span class="lineno"> 6251</span> </div><div class="line"><a name="l06252"></a><span class="lineno"> 6252</span>  <span class="keywordflow">if</span> (!in_queue[c]) {</div><div class="line"><a name="l06253"></a><span class="lineno"> 6253</span>  in_queue[c] = <span class="keyword">true</span>;</div><div class="line"><a name="l06254"></a><span class="lineno"> 6254</span>  queue.push_back(c);</div><div class="line"><a name="l06255"></a><span class="lineno"> 6255</span>  }</div><div class="line"><a name="l06256"></a><span class="lineno"> 6256</span>  }</div><div class="line"><a name="l06257"></a><span class="lineno"> 6257</span> </div><div class="line"><a name="l06258"></a><span class="lineno"> 6258</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < 2; ++i) {</div><div class="line"><a name="l06259"></a><span class="lineno"> 6259</span>  <span class="comment">// Re-add to the queue the constraints that touch a variable that changed.</span></div><div class="line"><a name="l06260"></a><span class="lineno"> 6260</span>  <span class="comment">//</span></div><div class="line"><a name="l06261"></a><span class="lineno"> 6261</span>  <span class="comment">// TODO(user): Avoid reprocessing the constraints that changed the</span></div><div class="line"><a name="l06262"></a><span class="lineno"> 6262</span>  <span class="comment">// variables with the use of timestamp.</span></div><div class="line"><a name="l06263"></a><span class="lineno"> 6263</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span>;</div><div class="line"><a name="l06264"></a><span class="lineno"> 6264</span>  in_queue.resize(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#aeaf0da781ca9b370d96b7fbd3f74266a">constraints_size</a>(), <span class="keyword">false</span>);</div><div class="line"><a name="l06265"></a><span class="lineno"> 6265</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> v : context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a02302d3a45d02003dcbf288d045ebd86">modified_domains</a>.<a class="code" href="classoperations__research_1_1_sparse_bitset.html#a1e5ae9fb14fd6b25919148ae8bbaf050">PositionsSetAtLeastOnce</a>()) {</div><div class="line"><a name="l06266"></a><span class="lineno"> 6266</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab246112417bad87cb948820e304208ab">VariableIsNotUsedAnymore</a>(v)) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l06267"></a><span class="lineno"> 6267</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#abb6eb29f56c3a33b8ae1b74b08b755c2">IsFixed</a>(v)) context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af4847724208dd09ba3fea8b53132d197">ExploitFixedDomain</a>(v);</div><div class="line"><a name="l06268"></a><span class="lineno"> 6268</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> c : context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#acf72cafd3dab9ac4b5e5b1a3aaa75192">VarToConstraints</a>(v)) {</div><div class="line"><a name="l06269"></a><span class="lineno"> 6269</span>  <span class="keywordflow">if</span> (c >= 0 && !in_queue[c]) {</div><div class="line"><a name="l06270"></a><span class="lineno"> 6270</span>  in_queue[c] = <span class="keyword">true</span>;</div><div class="line"><a name="l06271"></a><span class="lineno"> 6271</span>  queue.push_back(c);</div><div class="line"><a name="l06272"></a><span class="lineno"> 6272</span>  }</div><div class="line"><a name="l06273"></a><span class="lineno"> 6273</span>  }</div><div class="line"><a name="l06274"></a><span class="lineno"> 6274</span>  }</div><div class="line"><a name="l06275"></a><span class="lineno"> 6275</span> </div><div class="line"><a name="l06276"></a><span class="lineno"> 6276</span>  <span class="comment">// If we reach the end of the loop, try to detect dominance relations.</span></div><div class="line"><a name="l06277"></a><span class="lineno"> 6277</span>  <span class="keywordflow">if</span> (!queue.empty() || i == 1) <span class="keywordflow">break</span>;</div><div class="line"><a name="l06278"></a><span class="lineno"> 6278</span> </div><div class="line"><a name="l06279"></a><span class="lineno"> 6279</span>  <span class="comment">// Detect & exploit dominance between variables, or variables that can</span></div><div class="line"><a name="l06280"></a><span class="lineno"> 6280</span>  <span class="comment">// move freely in one direction. Or variables that are just blocked by one</span></div><div class="line"><a name="l06281"></a><span class="lineno"> 6281</span>  <span class="comment">// constraint in one direction.</span></div><div class="line"><a name="l06282"></a><span class="lineno"> 6282</span>  <span class="comment">//</span></div><div class="line"><a name="l06283"></a><span class="lineno"> 6283</span>  <span class="comment">// TODO(user): We can support assumptions but we need to not cut them out</span></div><div class="line"><a name="l06284"></a><span class="lineno"> 6284</span>  <span class="comment">// of the feasible region.</span></div><div class="line"><a name="l06285"></a><span class="lineno"> 6285</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab7b13b808e3dea6fc1e4006f7134e9f9">keep_all_feasible_solutions</a> &&</div><div class="line"><a name="l06286"></a><span class="lineno"> 6286</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ae4e8815b1f4564c29618b0fb285908fb">assumptions</a>().empty()) {</div><div class="line"><a name="l06287"></a><span class="lineno"> 6287</span>  VarDomination var_dom;</div><div class="line"><a name="l06288"></a><span class="lineno"> 6288</span>  DualBoundStrengthening dual_bound_strengthening;</div><div class="line"><a name="l06289"></a><span class="lineno"> 6289</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a747d1194d3ad5967b690d046ebb0c2eb">DetectDominanceRelations</a>(*context_, &var_dom,</div><div class="line"><a name="l06290"></a><span class="lineno"> 6290</span>  &dual_bound_strengthening);</div><div class="line"><a name="l06291"></a><span class="lineno"> 6291</span>  <span class="keywordflow">if</span> (!dual_bound_strengthening.Strengthen(context_)) <span class="keywordflow">return</span>;</div><div class="line"><a name="l06292"></a><span class="lineno"> 6292</span> </div><div class="line"><a name="l06293"></a><span class="lineno"> 6293</span>  <span class="comment">// TODO(user): The Strengthen() function above might make some</span></div><div class="line"><a name="l06294"></a><span class="lineno"> 6294</span>  <span class="comment">// inequality tight. Currently, because we only do that for implication,</span></div><div class="line"><a name="l06295"></a><span class="lineno"> 6295</span>  <span class="comment">// this will not change who dominate who, but in general we should</span></div><div class="line"><a name="l06296"></a><span class="lineno"> 6296</span>  <span class="comment">// process the new constraint direction before calling this.</span></div><div class="line"><a name="l06297"></a><span class="lineno"> 6297</span>  <span class="keywordflow">if</span> (!<a class="code" href="namespaceoperations__research_1_1sat.html#ad9fac07c1db385b6e80e268c0a2109d3">ExploitDominanceRelations</a>(var_dom, context_)) <span class="keywordflow">return</span>;</div><div class="line"><a name="l06298"></a><span class="lineno"> 6298</span>  }</div><div class="line"><a name="l06299"></a><span class="lineno"> 6299</span>  }</div><div class="line"><a name="l06300"></a><span class="lineno"> 6300</span> </div><div class="line"><a name="l06301"></a><span class="lineno"> 6301</span>  <span class="comment">// Make sure the order is deterministic! because var_to_constraints[]</span></div><div class="line"><a name="l06302"></a><span class="lineno"> 6302</span>  <span class="comment">// order changes from one run to the next.</span></div><div class="line"><a name="l06303"></a><span class="lineno"> 6303</span>  std::sort(queue.begin(), queue.end());</div><div class="line"><a name="l06304"></a><span class="lineno"> 6304</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a02302d3a45d02003dcbf288d045ebd86">modified_domains</a>.<a class="code" href="classoperations__research_1_1_sparse_bitset.html#ab4bc8236a9bfe59526e353800a0f0470">SparseClearAll</a>();</div><div class="line"><a name="l06305"></a><span class="lineno"> 6305</span>  }</div><div class="line"><a name="l06306"></a><span class="lineno"> 6306</span> </div><div class="line"><a name="l06307"></a><span class="lineno"> 6307</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">return</span>;</div><div class="line"><a name="l06308"></a><span class="lineno"> 6308</span> </div><div class="line"><a name="l06309"></a><span class="lineno"> 6309</span>  <span class="comment">// Second "pass" for transformation better done after all of the above and</span></div><div class="line"><a name="l06310"></a><span class="lineno"> 6310</span>  <span class="comment">// that do not need a fix-point loop.</span></div><div class="line"><a name="l06311"></a><span class="lineno"> 6311</span>  <span class="comment">//</span></div><div class="line"><a name="l06312"></a><span class="lineno"> 6312</span>  <span class="comment">// TODO(user): Also add deductions achieved during probing!</span></div><div class="line"><a name="l06313"></a><span class="lineno"> 6313</span>  <span class="comment">//</span></div><div class="line"><a name="l06314"></a><span class="lineno"> 6314</span>  <span class="comment">// TODO(user): ideally we should "wake-up" any constraint that contains an</span></div><div class="line"><a name="l06315"></a><span class="lineno"> 6315</span>  <span class="comment">// absent interval in the main propagation loop above. But we currently don't</span></div><div class="line"><a name="l06316"></a><span class="lineno"> 6316</span>  <span class="comment">// maintain such list.</span></div><div class="line"><a name="l06317"></a><span class="lineno"> 6317</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> num_constraints = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#aeaf0da781ca9b370d96b7fbd3f74266a">constraints_size</a>();</div><div class="line"><a name="l06318"></a><span class="lineno"> 6318</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> c = 0; c < num_constraints; ++c) {</div><div class="line"><a name="l06319"></a><span class="lineno"> 6319</span>  ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a> = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a9b3e1bc8b76ea7d2614fd7ec2b066039">mutable_constraints</a>(c);</div><div class="line"><a name="l06320"></a><span class="lineno"> 6320</span>  <span class="keywordflow">switch</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->constraint_case()) {</div><div class="line"><a name="l06321"></a><span class="lineno"> 6321</span>  <span class="keywordflow">case</span> ConstraintProto::ConstraintCase::kNoOverlap:</div><div class="line"><a name="l06322"></a><span class="lineno"> 6322</span>  <span class="comment">// Filter out absent intervals.</span></div><div class="line"><a name="l06323"></a><span class="lineno"> 6323</span>  <span class="keywordflow">if</span> (PresolveNoOverlap(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) {</div><div class="line"><a name="l06324"></a><span class="lineno"> 6324</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab75a27c0aeda2de9c3957719b8196c36">UpdateConstraintVariableUsage</a>(c);</div><div class="line"><a name="l06325"></a><span class="lineno"> 6325</span>  }</div><div class="line"><a name="l06326"></a><span class="lineno"> 6326</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l06327"></a><span class="lineno"> 6327</span>  <span class="keywordflow">case</span> ConstraintProto::ConstraintCase::kNoOverlap2D:</div><div class="line"><a name="l06328"></a><span class="lineno"> 6328</span>  <span class="comment">// Filter out absent intervals.</span></div><div class="line"><a name="l06329"></a><span class="lineno"> 6329</span>  <span class="keywordflow">if</span> (PresolveNoOverlap2D(c, <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) {</div><div class="line"><a name="l06330"></a><span class="lineno"> 6330</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab75a27c0aeda2de9c3957719b8196c36">UpdateConstraintVariableUsage</a>(c);</div><div class="line"><a name="l06331"></a><span class="lineno"> 6331</span>  }</div><div class="line"><a name="l06332"></a><span class="lineno"> 6332</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l06333"></a><span class="lineno"> 6333</span>  <span class="keywordflow">case</span> ConstraintProto::ConstraintCase::kCumulative:</div><div class="line"><a name="l06334"></a><span class="lineno"> 6334</span>  <span class="comment">// Filter out absent intervals.</span></div><div class="line"><a name="l06335"></a><span class="lineno"> 6335</span>  <span class="keywordflow">if</span> (PresolveCumulative(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) {</div><div class="line"><a name="l06336"></a><span class="lineno"> 6336</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab75a27c0aeda2de9c3957719b8196c36">UpdateConstraintVariableUsage</a>(c);</div><div class="line"><a name="l06337"></a><span class="lineno"> 6337</span>  }</div><div class="line"><a name="l06338"></a><span class="lineno"> 6338</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l06339"></a><span class="lineno"> 6339</span>  <span class="keywordflow">case</span> ConstraintProto::ConstraintCase::kBoolOr: {</div><div class="line"><a name="l06340"></a><span class="lineno"> 6340</span>  <span class="comment">// Try to infer domain reductions from clauses and the saved "implies in</span></div><div class="line"><a name="l06341"></a><span class="lineno"> 6341</span>  <span class="comment">// domain" relations.</span></div><div class="line"><a name="l06342"></a><span class="lineno"> 6342</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span>& pair :</div><div class="line"><a name="l06343"></a><span class="lineno"> 6343</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a6e086436e931cd8b341d85e6889b838d">deductions</a>.<a class="code" href="classoperations__research_1_1sat_1_1_domain_deductions.html#a257a307f168114c2e4d8787376e0997f">ProcessClause</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->bool_or().literals())) {</div><div class="line"><a name="l06344"></a><span class="lineno"> 6344</span>  <span class="keywordtype">bool</span> modified = <span class="keyword">false</span>;</div><div class="line"><a name="l06345"></a><span class="lineno"> 6345</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">IntersectDomainWith</a>(pair.first, pair.second,</div><div class="line"><a name="l06346"></a><span class="lineno"> 6346</span>  &modified)) {</div><div class="line"><a name="l06347"></a><span class="lineno"> 6347</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l06348"></a><span class="lineno"> 6348</span>  }</div><div class="line"><a name="l06349"></a><span class="lineno"> 6349</span>  <span class="keywordflow">if</span> (modified) {</div><div class="line"><a name="l06350"></a><span class="lineno"> 6350</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"deductions: reduced variable domain"</span>);</div><div class="line"><a name="l06351"></a><span class="lineno"> 6351</span>  }</div><div class="line"><a name="l06352"></a><span class="lineno"> 6352</span>  }</div><div class="line"><a name="l06353"></a><span class="lineno"> 6353</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l06354"></a><span class="lineno"> 6354</span>  }</div><div class="line"><a name="l06355"></a><span class="lineno"> 6355</span>  <span class="keywordflow">default</span>:</div><div class="line"><a name="l06356"></a><span class="lineno"> 6356</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l06357"></a><span class="lineno"> 6357</span>  }</div><div class="line"><a name="l06358"></a><span class="lineno"> 6358</span>  }</div><div class="line"><a name="l06359"></a><span class="lineno"> 6359</span> </div><div class="line"><a name="l06360"></a><span class="lineno"> 6360</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a6e086436e931cd8b341d85e6889b838d">deductions</a>.<a class="code" href="classoperations__research_1_1sat_1_1_domain_deductions.html#aaf4b2d33728a210c2b634812bcec0dae">MarkProcessingAsDoneForNow</a>();</div><div class="line"><a name="l06361"></a><span class="lineno"> 6361</span> }</div><div class="line"><a name="l06362"></a><span class="lineno"> 6362</span> </div><div class="line"><a name="l06363"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_model_copy.html#a4dc4003514ad43b655e41524c32352f1"> 6363</a></span> <a class="code" href="classoperations__research_1_1sat_1_1_model_copy.html#a4dc4003514ad43b655e41524c32352f1">ModelCopy::ModelCopy</a>(<a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html">PresolveContext</a>* <a class="code" href="gurobi__interface_8cc.html#a5f287b83a753915ae862fed64f8640a6">context</a>) : context_(<a class="code" href="gurobi__interface_8cc.html#a5f287b83a753915ae862fed64f8640a6">context</a>) {}</div><div class="line"><a name="l06364"></a><span class="lineno"> 6364</span> </div><div class="line"><a name="l06365"></a><span class="lineno"> 6365</span> <span class="comment">// TODO(user): Merge with the phase 1 of the presolve code.</span></div><div class="line"><a name="l06366"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_model_copy.html#ad74e75903c729a01bd681095bd51ff4e"> 6366</a></span> <span class="keywordtype">bool</span> <a class="code" href="classoperations__research_1_1sat_1_1_model_copy.html#ad74e75903c729a01bd681095bd51ff4e">ModelCopy::ImportAndSimplifyConstraints</a>(</div><div class="line"><a name="l06367"></a><span class="lineno"> 6367</span>  <span class="keyword">const</span> <a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html">CpModelProto</a>& in_model, <span class="keyword">const</span> std::vector<int>& ignored_constraints) {</div><div class="line"><a name="l06368"></a><span class="lineno"> 6368</span>  <span class="keyword">const</span> absl::flat_hash_set<int> ignored_constraints_set(</div><div class="line"><a name="l06369"></a><span class="lineno"> 6369</span>  ignored_constraints.begin(), ignored_constraints.end());</div><div class="line"><a name="l06370"></a><span class="lineno"> 6370</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a62cd771660767621e917b2c256182c4e">InitializeNewDomains</a>();</div><div class="line"><a name="l06371"></a><span class="lineno"> 6371</span> </div><div class="line"><a name="l06372"></a><span class="lineno"> 6372</span>  starting_constraint_index_ = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#aeaf0da781ca9b370d96b7fbd3f74266a">constraints_size</a>();</div><div class="line"><a name="l06373"></a><span class="lineno"> 6373</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> c = 0; c < in_model.<a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#aeaf0da781ca9b370d96b7fbd3f74266a">constraints_size</a>(); ++c) {</div><div class="line"><a name="l06374"></a><span class="lineno"> 6374</span>  <span class="keywordflow">if</span> (ignored_constraints_set.contains(c)) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l06375"></a><span class="lineno"> 6375</span> </div><div class="line"><a name="l06376"></a><span class="lineno"> 6376</span>  <span class="keyword">const</span> <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html">ConstraintProto</a>& <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a> = in_model.<a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#afce66afa8ae7776a449bba7313ea3559">constraints</a>(c);</div><div class="line"><a name="l06377"></a><span class="lineno"> 6377</span>  <span class="keywordflow">if</span> (OneEnforcementLiteralIsFalse(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) &&</div><div class="line"><a name="l06378"></a><span class="lineno"> 6378</span>  <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.constraint_case() != <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35a1b948ef604eecbb4da42feb6bed2beff">ConstraintProto::kInterval</a>) {</div><div class="line"><a name="l06379"></a><span class="lineno"> 6379</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l06380"></a><span class="lineno"> 6380</span>  }</div><div class="line"><a name="l06381"></a><span class="lineno"> 6381</span>  <span class="keywordflow">switch</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.constraint_case()) {</div><div class="line"><a name="l06382"></a><span class="lineno"> 6382</span>  <span class="keywordflow">case</span> <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35a7af079189afb65e704861b8cdfb301f4">ConstraintProto::CONSTRAINT_NOT_SET</a>: {</div><div class="line"><a name="l06383"></a><span class="lineno"> 6383</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l06384"></a><span class="lineno"> 6384</span>  }</div><div class="line"><a name="l06385"></a><span class="lineno"> 6385</span>  <span class="keywordflow">case</span> <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35aaadb0c3370c597095e0cb7e768f04567">ConstraintProto::kBoolOr</a>: {</div><div class="line"><a name="l06386"></a><span class="lineno"> 6386</span>  <span class="keywordflow">if</span> (!CopyBoolOr(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) <span class="keywordflow">return</span> CreateUnsatModel();</div><div class="line"><a name="l06387"></a><span class="lineno"> 6387</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l06388"></a><span class="lineno"> 6388</span>  }</div><div class="line"><a name="l06389"></a><span class="lineno"> 6389</span>  <span class="keywordflow">case</span> <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35aef651681e2d17f777063fddf191f4a99">ConstraintProto::kBoolAnd</a>: {</div><div class="line"><a name="l06390"></a><span class="lineno"> 6390</span>  <span class="keywordflow">if</span> (!CopyBoolAnd(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) <span class="keywordflow">return</span> CreateUnsatModel();</div><div class="line"><a name="l06391"></a><span class="lineno"> 6391</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l06392"></a><span class="lineno"> 6392</span>  }</div><div class="line"><a name="l06393"></a><span class="lineno"> 6393</span>  <span class="keywordflow">case</span> <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35ac188c019178783e5be55110601309d7d">ConstraintProto::kLinear</a>: {</div><div class="line"><a name="l06394"></a><span class="lineno"> 6394</span>  <span class="keywordflow">if</span> (!CopyLinear(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) <span class="keywordflow">return</span> CreateUnsatModel();</div><div class="line"><a name="l06395"></a><span class="lineno"> 6395</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l06396"></a><span class="lineno"> 6396</span>  }</div><div class="line"><a name="l06397"></a><span class="lineno"> 6397</span>  <span class="keywordflow">case</span> <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35a60d782b0aafa6f70b6230ffd970b2c6b">ConstraintProto::kAtMostOne</a>: {</div><div class="line"><a name="l06398"></a><span class="lineno"> 6398</span>  <span class="keywordflow">if</span> (!CopyAtMostOne(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) <span class="keywordflow">return</span> CreateUnsatModel();</div><div class="line"><a name="l06399"></a><span class="lineno"> 6399</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l06400"></a><span class="lineno"> 6400</span>  }</div><div class="line"><a name="l06401"></a><span class="lineno"> 6401</span>  <span class="keywordflow">case</span> <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35ad60570d9bed938f8b11385a7ba7f3508">ConstraintProto::kExactlyOne</a>: {</div><div class="line"><a name="l06402"></a><span class="lineno"> 6402</span>  <span class="keywordflow">if</span> (!CopyExactlyOne(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)) <span class="keywordflow">return</span> CreateUnsatModel();</div><div class="line"><a name="l06403"></a><span class="lineno"> 6403</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l06404"></a><span class="lineno"> 6404</span>  }</div><div class="line"><a name="l06405"></a><span class="lineno"> 6405</span>  <span class="keywordflow">case</span> <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35a1b948ef604eecbb4da42feb6bed2beff">ConstraintProto::kInterval</a>: {</div><div class="line"><a name="l06406"></a><span class="lineno"> 6406</span>  <span class="keywordflow">if</span> (!CopyInterval(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>, c)) <span class="keywordflow">return</span> CreateUnsatModel();</div><div class="line"><a name="l06407"></a><span class="lineno"> 6407</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l06408"></a><span class="lineno"> 6408</span>  }</div><div class="line"><a name="l06409"></a><span class="lineno"> 6409</span>  <span class="keywordflow">default</span>: {</div><div class="line"><a name="l06410"></a><span class="lineno"> 6410</span>  *context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>() = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>;</div><div class="line"><a name="l06411"></a><span class="lineno"> 6411</span>  }</div><div class="line"><a name="l06412"></a><span class="lineno"> 6412</span>  }</div><div class="line"><a name="l06413"></a><span class="lineno"> 6413</span>  }</div><div class="line"><a name="l06414"></a><span class="lineno"> 6414</span> </div><div class="line"><a name="l06415"></a><span class="lineno"> 6415</span>  <span class="comment">// Re-map interval indices for new constraints.</span></div><div class="line"><a name="l06416"></a><span class="lineno"> 6416</span>  <span class="comment">// TODO(user): Support removing unperformed intervals.</span></div><div class="line"><a name="l06417"></a><span class="lineno"> 6417</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> c = starting_constraint_index_;</div><div class="line"><a name="l06418"></a><span class="lineno"> 6418</span>  c < context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#aeaf0da781ca9b370d96b7fbd3f74266a">constraints_size</a>(); ++c) {</div><div class="line"><a name="l06419"></a><span class="lineno"> 6419</span>  <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html">ConstraintProto</a>& ct_ref = *context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a9b3e1bc8b76ea7d2614fd7ec2b066039">mutable_constraints</a>(c);</div><div class="line"><a name="l06420"></a><span class="lineno"> 6420</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a81b6165b5a5412969f351d0d343166b9">ApplyToAllIntervalIndices</a>(</div><div class="line"><a name="l06421"></a><span class="lineno"> 6421</span>  [<span class="keyword">this</span>](<span class="keywordtype">int</span>* ref) {</div><div class="line"><a name="l06422"></a><span class="lineno"> 6422</span>  <span class="keyword">const</span> <span class="keyword">auto</span>& it = interval_mapping_.find(*ref);</div><div class="line"><a name="l06423"></a><span class="lineno"> 6423</span>  <span class="keywordflow">if</span> (it != interval_mapping_.end()) {</div><div class="line"><a name="l06424"></a><span class="lineno"> 6424</span>  *ref = it->second;</div><div class="line"><a name="l06425"></a><span class="lineno"> 6425</span>  }</div><div class="line"><a name="l06426"></a><span class="lineno"> 6426</span>  },</div><div class="line"><a name="l06427"></a><span class="lineno"> 6427</span>  &ct_ref);</div><div class="line"><a name="l06428"></a><span class="lineno"> 6428</span>  }</div><div class="line"><a name="l06429"></a><span class="lineno"> 6429</span> </div><div class="line"><a name="l06430"></a><span class="lineno"> 6430</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l06431"></a><span class="lineno"> 6431</span> }</div><div class="line"><a name="l06432"></a><span class="lineno"> 6432</span> </div><div class="line"><a name="l06433"></a><span class="lineno"> 6433</span> <span class="keywordtype">void</span> ModelCopy::CopyEnforcementLiterals(<span class="keyword">const</span> <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html">ConstraintProto</a>& orig,</div><div class="line"><a name="l06434"></a><span class="lineno"> 6434</span>  <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html">ConstraintProto</a>* dest) {</div><div class="line"><a name="l06435"></a><span class="lineno"> 6435</span>  temp_enforcement_literals_.clear();</div><div class="line"><a name="l06436"></a><span class="lineno"> 6436</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> lit : orig.<a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#acdc90a25e531e4180c495f4ecf2aca2e">enforcement_literal</a>()) {</div><div class="line"><a name="l06437"></a><span class="lineno"> 6437</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a890f923209473cf55ac002d1b14bd9e2">LiteralIsTrue</a>(lit)) {</div><div class="line"><a name="l06438"></a><span class="lineno"> 6438</span>  skipped_non_zero_++;</div><div class="line"><a name="l06439"></a><span class="lineno"> 6439</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l06440"></a><span class="lineno"> 6440</span>  }</div><div class="line"><a name="l06441"></a><span class="lineno"> 6441</span>  temp_enforcement_literals_.push_back(lit);</div><div class="line"><a name="l06442"></a><span class="lineno"> 6442</span>  }</div><div class="line"><a name="l06443"></a><span class="lineno"> 6443</span>  dest-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a30bb8cd86cbd9eae09b21783f28f8967">mutable_enforcement_literal</a>()->Add(temp_enforcement_literals_.begin(),</div><div class="line"><a name="l06444"></a><span class="lineno"> 6444</span>  temp_enforcement_literals_.end());</div><div class="line"><a name="l06445"></a><span class="lineno"> 6445</span> }</div><div class="line"><a name="l06446"></a><span class="lineno"> 6446</span> </div><div class="line"><a name="l06447"></a><span class="lineno"> 6447</span> <span class="keywordtype">bool</span> ModelCopy::OneEnforcementLiteralIsFalse(<span class="keyword">const</span> ConstraintProto& <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>)<span class="keyword"> const </span>{</div><div class="line"><a name="l06448"></a><span class="lineno"> 6448</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> lit : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.enforcement_literal()) {</div><div class="line"><a name="l06449"></a><span class="lineno"> 6449</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a9f3443b281c705edf1779f746637ad9b">LiteralIsFalse</a>(lit)) {</div><div class="line"><a name="l06450"></a><span class="lineno"> 6450</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l06451"></a><span class="lineno"> 6451</span>  }</div><div class="line"><a name="l06452"></a><span class="lineno"> 6452</span>  }</div><div class="line"><a name="l06453"></a><span class="lineno"> 6453</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l06454"></a><span class="lineno"> 6454</span> }</div><div class="line"><a name="l06455"></a><span class="lineno"> 6455</span> </div><div class="line"><a name="l06456"></a><span class="lineno"> 6456</span> <span class="keywordtype">bool</span> ModelCopy::CopyBoolOr(<span class="keyword">const</span> ConstraintProto& <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l06457"></a><span class="lineno"> 6457</span>  temp_literals_.clear();</div><div class="line"><a name="l06458"></a><span class="lineno"> 6458</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> lit : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.enforcement_literal()) {</div><div class="line"><a name="l06459"></a><span class="lineno"> 6459</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a890f923209473cf55ac002d1b14bd9e2">LiteralIsTrue</a>(lit)) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l06460"></a><span class="lineno"> 6460</span>  temp_literals_.push_back(<a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(lit));</div><div class="line"><a name="l06461"></a><span class="lineno"> 6461</span>  }</div><div class="line"><a name="l06462"></a><span class="lineno"> 6462</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> lit : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.bool_or().literals()) {</div><div class="line"><a name="l06463"></a><span class="lineno"> 6463</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a890f923209473cf55ac002d1b14bd9e2">LiteralIsTrue</a>(lit)) {</div><div class="line"><a name="l06464"></a><span class="lineno"> 6464</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l06465"></a><span class="lineno"> 6465</span>  }</div><div class="line"><a name="l06466"></a><span class="lineno"> 6466</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a9f3443b281c705edf1779f746637ad9b">LiteralIsFalse</a>(lit)) {</div><div class="line"><a name="l06467"></a><span class="lineno"> 6467</span>  skipped_non_zero_++;</div><div class="line"><a name="l06468"></a><span class="lineno"> 6468</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l06469"></a><span class="lineno"> 6469</span>  temp_literals_.push_back(lit);</div><div class="line"><a name="l06470"></a><span class="lineno"> 6470</span>  }</div><div class="line"><a name="l06471"></a><span class="lineno"> 6471</span>  }</div><div class="line"><a name="l06472"></a><span class="lineno"> 6472</span> </div><div class="line"><a name="l06473"></a><span class="lineno"> 6473</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>()</div><div class="line"><a name="l06474"></a><span class="lineno"> 6474</span>  -><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ae26e2a099b411b50dd1d4c6605837d0a">mutable_bool_or</a>()</div><div class="line"><a name="l06475"></a><span class="lineno"> 6475</span>  -><a class="code" href="classoperations__research_1_1sat_1_1_bool_argument_proto.html#a7e9ec85488cc2f768942885d54b2df8c">mutable_literals</a>()</div><div class="line"><a name="l06476"></a><span class="lineno"> 6476</span>  ->Add(temp_literals_.begin(), temp_literals_.end());</div><div class="line"><a name="l06477"></a><span class="lineno"> 6477</span>  <span class="keywordflow">return</span> !temp_literals_.empty();</div><div class="line"><a name="l06478"></a><span class="lineno"> 6478</span> }</div><div class="line"><a name="l06479"></a><span class="lineno"> 6479</span> </div><div class="line"><a name="l06480"></a><span class="lineno"> 6480</span> <span class="keywordtype">bool</span> ModelCopy::CopyBoolAnd(<span class="keyword">const</span> ConstraintProto& <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l06481"></a><span class="lineno"> 6481</span>  <span class="keywordtype">bool</span> at_least_one_false = <span class="keyword">false</span>;</div><div class="line"><a name="l06482"></a><span class="lineno"> 6482</span>  <span class="keywordtype">int</span> num_non_fixed_literals = 0;</div><div class="line"><a name="l06483"></a><span class="lineno"> 6483</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> lit : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.bool_and().literals()) {</div><div class="line"><a name="l06484"></a><span class="lineno"> 6484</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a9f3443b281c705edf1779f746637ad9b">LiteralIsFalse</a>(lit)) {</div><div class="line"><a name="l06485"></a><span class="lineno"> 6485</span>  at_least_one_false = <span class="keyword">true</span>;</div><div class="line"><a name="l06486"></a><span class="lineno"> 6486</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l06487"></a><span class="lineno"> 6487</span>  }</div><div class="line"><a name="l06488"></a><span class="lineno"> 6488</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a890f923209473cf55ac002d1b14bd9e2">LiteralIsTrue</a>(lit)) {</div><div class="line"><a name="l06489"></a><span class="lineno"> 6489</span>  num_non_fixed_literals++;</div><div class="line"><a name="l06490"></a><span class="lineno"> 6490</span>  }</div><div class="line"><a name="l06491"></a><span class="lineno"> 6491</span>  }</div><div class="line"><a name="l06492"></a><span class="lineno"> 6492</span> </div><div class="line"><a name="l06493"></a><span class="lineno"> 6493</span>  <span class="keywordflow">if</span> (at_least_one_false) {</div><div class="line"><a name="l06494"></a><span class="lineno"> 6494</span>  ConstraintProto* new_ct = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>();</div><div class="line"><a name="l06495"></a><span class="lineno"> 6495</span>  BoolArgumentProto* bool_or = new_ct-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ae26e2a099b411b50dd1d4c6605837d0a">mutable_bool_or</a>();</div><div class="line"><a name="l06496"></a><span class="lineno"> 6496</span> </div><div class="line"><a name="l06497"></a><span class="lineno"> 6497</span>  <span class="comment">// One enforcement literal must be false.</span></div><div class="line"><a name="l06498"></a><span class="lineno"> 6498</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> lit : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.enforcement_literal()) {</div><div class="line"><a name="l06499"></a><span class="lineno"> 6499</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a890f923209473cf55ac002d1b14bd9e2">LiteralIsTrue</a>(lit)) {</div><div class="line"><a name="l06500"></a><span class="lineno"> 6500</span>  skipped_non_zero_++;</div><div class="line"><a name="l06501"></a><span class="lineno"> 6501</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l06502"></a><span class="lineno"> 6502</span>  }</div><div class="line"><a name="l06503"></a><span class="lineno"> 6503</span>  bool_or->add_literals(<a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(lit));</div><div class="line"><a name="l06504"></a><span class="lineno"> 6504</span>  }</div><div class="line"><a name="l06505"></a><span class="lineno"> 6505</span>  <span class="keywordflow">return</span> !bool_or->literals().empty();</div><div class="line"><a name="l06506"></a><span class="lineno"> 6506</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (num_non_fixed_literals > 0) {</div><div class="line"><a name="l06507"></a><span class="lineno"> 6507</span>  ConstraintProto* new_ct = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>();</div><div class="line"><a name="l06508"></a><span class="lineno"> 6508</span>  CopyEnforcementLiterals(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>, new_ct);</div><div class="line"><a name="l06509"></a><span class="lineno"> 6509</span>  BoolArgumentProto* bool_and = new_ct->mutable_bool_and();</div><div class="line"><a name="l06510"></a><span class="lineno"> 6510</span>  bool_and->mutable_literals()->Reserve(num_non_fixed_literals);</div><div class="line"><a name="l06511"></a><span class="lineno"> 6511</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> lit : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.bool_and().literals()) {</div><div class="line"><a name="l06512"></a><span class="lineno"> 6512</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a890f923209473cf55ac002d1b14bd9e2">LiteralIsTrue</a>(lit)) {</div><div class="line"><a name="l06513"></a><span class="lineno"> 6513</span>  skipped_non_zero_++;</div><div class="line"><a name="l06514"></a><span class="lineno"> 6514</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l06515"></a><span class="lineno"> 6515</span>  }</div><div class="line"><a name="l06516"></a><span class="lineno"> 6516</span>  bool_and->add_literals(lit);</div><div class="line"><a name="l06517"></a><span class="lineno"> 6517</span>  }</div><div class="line"><a name="l06518"></a><span class="lineno"> 6518</span>  }</div><div class="line"><a name="l06519"></a><span class="lineno"> 6519</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l06520"></a><span class="lineno"> 6520</span> }</div><div class="line"><a name="l06521"></a><span class="lineno"> 6521</span> </div><div class="line"><a name="l06522"></a><span class="lineno"> 6522</span> <span class="keywordtype">bool</span> ModelCopy::CopyLinear(<span class="keyword">const</span> ConstraintProto& <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l06523"></a><span class="lineno"> 6523</span>  non_fixed_variables_.clear();</div><div class="line"><a name="l06524"></a><span class="lineno"> 6524</span>  non_fixed_coefficients_.clear();</div><div class="line"><a name="l06525"></a><span class="lineno"> 6525</span>  int64_t offset = 0;</div><div class="line"><a name="l06526"></a><span class="lineno"> 6526</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.linear().vars_size(); ++i) {</div><div class="line"><a name="l06527"></a><span class="lineno"> 6527</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> ref = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.linear().vars(i);</div><div class="line"><a name="l06528"></a><span class="lineno"> 6528</span>  <span class="keyword">const</span> int64_t coeff = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.linear().coeffs(i);</div><div class="line"><a name="l06529"></a><span class="lineno"> 6529</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#abb6eb29f56c3a33b8ae1b74b08b755c2">IsFixed</a>(ref)) {</div><div class="line"><a name="l06530"></a><span class="lineno"> 6530</span>  offset += coeff * context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">MinOf</a>(ref);</div><div class="line"><a name="l06531"></a><span class="lineno"> 6531</span>  skipped_non_zero_++;</div><div class="line"><a name="l06532"></a><span class="lineno"> 6532</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l06533"></a><span class="lineno"> 6533</span>  non_fixed_variables_.push_back(ref);</div><div class="line"><a name="l06534"></a><span class="lineno"> 6534</span>  non_fixed_coefficients_.push_back(coeff);</div><div class="line"><a name="l06535"></a><span class="lineno"> 6535</span>  }</div><div class="line"><a name="l06536"></a><span class="lineno"> 6536</span>  }</div><div class="line"><a name="l06537"></a><span class="lineno"> 6537</span> </div><div class="line"><a name="l06538"></a><span class="lineno"> 6538</span>  <span class="keyword">const</span> Domain new_domain =</div><div class="line"><a name="l06539"></a><span class="lineno"> 6539</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#ab1240060466ba48a36a4b36379bce26a">ReadDomainFromProto</a>(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.linear()).AdditionWith(Domain(-offset));</div><div class="line"><a name="l06540"></a><span class="lineno"> 6540</span>  <span class="keywordflow">if</span> (non_fixed_variables_.empty() && !new_domain.Contains(0)) {</div><div class="line"><a name="l06541"></a><span class="lineno"> 6541</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.enforcement_literal().empty()) {</div><div class="line"><a name="l06542"></a><span class="lineno"> 6542</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l06543"></a><span class="lineno"> 6543</span>  }</div><div class="line"><a name="l06544"></a><span class="lineno"> 6544</span>  temp_literals_.clear();</div><div class="line"><a name="l06545"></a><span class="lineno"> 6545</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a> : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.enforcement_literal()) {</div><div class="line"><a name="l06546"></a><span class="lineno"> 6546</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a890f923209473cf55ac002d1b14bd9e2">LiteralIsTrue</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>)) {</div><div class="line"><a name="l06547"></a><span class="lineno"> 6547</span>  skipped_non_zero_++;</div><div class="line"><a name="l06548"></a><span class="lineno"> 6548</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l06549"></a><span class="lineno"> 6549</span>  temp_literals_.push_back(<a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>));</div><div class="line"><a name="l06550"></a><span class="lineno"> 6550</span>  }</div><div class="line"><a name="l06551"></a><span class="lineno"> 6551</span>  }</div><div class="line"><a name="l06552"></a><span class="lineno"> 6552</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>()</div><div class="line"><a name="l06553"></a><span class="lineno"> 6553</span>  -><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ae26e2a099b411b50dd1d4c6605837d0a">mutable_bool_or</a>()</div><div class="line"><a name="l06554"></a><span class="lineno"> 6554</span>  -><a class="code" href="classoperations__research_1_1sat_1_1_bool_argument_proto.html#a7e9ec85488cc2f768942885d54b2df8c">mutable_literals</a>()</div><div class="line"><a name="l06555"></a><span class="lineno"> 6555</span>  ->Add(temp_literals_.begin(), temp_literals_.end());</div><div class="line"><a name="l06556"></a><span class="lineno"> 6556</span>  <span class="keywordflow">return</span> !temp_literals_.empty();</div><div class="line"><a name="l06557"></a><span class="lineno"> 6557</span>  }</div><div class="line"><a name="l06558"></a><span class="lineno"> 6558</span> </div><div class="line"><a name="l06559"></a><span class="lineno"> 6559</span>  ConstraintProto* new_ct = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>();</div><div class="line"><a name="l06560"></a><span class="lineno"> 6560</span>  CopyEnforcementLiterals(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>, new_ct);</div><div class="line"><a name="l06561"></a><span class="lineno"> 6561</span>  LinearConstraintProto* linear = new_ct->mutable_linear();</div><div class="line"><a name="l06562"></a><span class="lineno"> 6562</span>  linear->mutable_vars()->Add(non_fixed_variables_.begin(),</div><div class="line"><a name="l06563"></a><span class="lineno"> 6563</span>  non_fixed_variables_.end());</div><div class="line"><a name="l06564"></a><span class="lineno"> 6564</span>  linear->mutable_coeffs()->Add(non_fixed_coefficients_.begin(),</div><div class="line"><a name="l06565"></a><span class="lineno"> 6565</span>  non_fixed_coefficients_.end());</div><div class="line"><a name="l06566"></a><span class="lineno"> 6566</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a901c19b12842f8af153e588a689a90b5">FillDomainInProto</a>(new_domain, linear);</div><div class="line"><a name="l06567"></a><span class="lineno"> 6567</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l06568"></a><span class="lineno"> 6568</span> }</div><div class="line"><a name="l06569"></a><span class="lineno"> 6569</span> </div><div class="line"><a name="l06570"></a><span class="lineno"> 6570</span> <span class="keywordtype">bool</span> ModelCopy::CopyAtMostOne(<span class="keyword">const</span> ConstraintProto& <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l06571"></a><span class="lineno"> 6571</span>  <span class="keywordtype">int</span> num_true = 0;</div><div class="line"><a name="l06572"></a><span class="lineno"> 6572</span>  temp_literals_.clear();</div><div class="line"><a name="l06573"></a><span class="lineno"> 6573</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> lit : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.at_most_one().literals()) {</div><div class="line"><a name="l06574"></a><span class="lineno"> 6574</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a9f3443b281c705edf1779f746637ad9b">LiteralIsFalse</a>(lit)) {</div><div class="line"><a name="l06575"></a><span class="lineno"> 6575</span>  skipped_non_zero_++;</div><div class="line"><a name="l06576"></a><span class="lineno"> 6576</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l06577"></a><span class="lineno"> 6577</span>  }</div><div class="line"><a name="l06578"></a><span class="lineno"> 6578</span>  temp_literals_.push_back(lit);</div><div class="line"><a name="l06579"></a><span class="lineno"> 6579</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a890f923209473cf55ac002d1b14bd9e2">LiteralIsTrue</a>(lit)) num_true++;</div><div class="line"><a name="l06580"></a><span class="lineno"> 6580</span>  }</div><div class="line"><a name="l06581"></a><span class="lineno"> 6581</span> </div><div class="line"><a name="l06582"></a><span class="lineno"> 6582</span>  <span class="keywordflow">if</span> (temp_literals_.size() <= 1) <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l06583"></a><span class="lineno"> 6583</span>  <span class="keywordflow">if</span> (num_true > 1) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l06584"></a><span class="lineno"> 6584</span>  <span class="comment">// TODO(user): presolve if num_true == 1.</span></div><div class="line"><a name="l06585"></a><span class="lineno"> 6585</span> </div><div class="line"><a name="l06586"></a><span class="lineno"> 6586</span>  ConstraintProto* new_ct = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>();</div><div class="line"><a name="l06587"></a><span class="lineno"> 6587</span>  CopyEnforcementLiterals(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>, new_ct);</div><div class="line"><a name="l06588"></a><span class="lineno"> 6588</span>  new_ct->mutable_at_most_one()->mutable_literals()->Add(temp_literals_.begin(),</div><div class="line"><a name="l06589"></a><span class="lineno"> 6589</span>  temp_literals_.end());</div><div class="line"><a name="l06590"></a><span class="lineno"> 6590</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l06591"></a><span class="lineno"> 6591</span> }</div><div class="line"><a name="l06592"></a><span class="lineno"> 6592</span> </div><div class="line"><a name="l06593"></a><span class="lineno"> 6593</span> <span class="keywordtype">bool</span> ModelCopy::CopyExactlyOne(<span class="keyword">const</span> ConstraintProto& <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l06594"></a><span class="lineno"> 6594</span>  <span class="keywordtype">int</span> num_true = 0;</div><div class="line"><a name="l06595"></a><span class="lineno"> 6595</span>  temp_literals_.clear();</div><div class="line"><a name="l06596"></a><span class="lineno"> 6596</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> lit : <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.exactly_one().literals()) {</div><div class="line"><a name="l06597"></a><span class="lineno"> 6597</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a9f3443b281c705edf1779f746637ad9b">LiteralIsFalse</a>(lit)) {</div><div class="line"><a name="l06598"></a><span class="lineno"> 6598</span>  skipped_non_zero_++;</div><div class="line"><a name="l06599"></a><span class="lineno"> 6599</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l06600"></a><span class="lineno"> 6600</span>  }</div><div class="line"><a name="l06601"></a><span class="lineno"> 6601</span>  temp_literals_.push_back(lit);</div><div class="line"><a name="l06602"></a><span class="lineno"> 6602</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a890f923209473cf55ac002d1b14bd9e2">LiteralIsTrue</a>(lit)) num_true++;</div><div class="line"><a name="l06603"></a><span class="lineno"> 6603</span>  }</div><div class="line"><a name="l06604"></a><span class="lineno"> 6604</span> </div><div class="line"><a name="l06605"></a><span class="lineno"> 6605</span>  <span class="keywordflow">if</span> (temp_literals_.empty() || num_true > 1) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l06606"></a><span class="lineno"> 6606</span> </div><div class="line"><a name="l06607"></a><span class="lineno"> 6607</span>  <span class="comment">// TODO(user): presolve if num_true == 1.</span></div><div class="line"><a name="l06608"></a><span class="lineno"> 6608</span>  ConstraintProto* new_ct = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>();</div><div class="line"><a name="l06609"></a><span class="lineno"> 6609</span>  CopyEnforcementLiterals(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>, new_ct);</div><div class="line"><a name="l06610"></a><span class="lineno"> 6610</span>  new_ct->mutable_exactly_one()->mutable_literals()->Add(temp_literals_.begin(),</div><div class="line"><a name="l06611"></a><span class="lineno"> 6611</span>  temp_literals_.end());</div><div class="line"><a name="l06612"></a><span class="lineno"> 6612</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l06613"></a><span class="lineno"> 6613</span> }</div><div class="line"><a name="l06614"></a><span class="lineno"> 6614</span> </div><div class="line"><a name="l06615"></a><span class="lineno"> 6615</span> <span class="keywordtype">bool</span> ModelCopy::CopyInterval(<span class="keyword">const</span> ConstraintProto& <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>, <span class="keywordtype">int</span> c) {</div><div class="line"><a name="l06616"></a><span class="lineno"> 6616</span>  <span class="comment">// TODO(user): remove non performed intervals.</span></div><div class="line"><a name="l06617"></a><span class="lineno"> 6617</span>  <a class="code" href="base_2logging_8h.html#a7c0ce053b28d53aa4eaf3eb7fb71663b">CHECK_EQ</a>(starting_constraint_index_, 0)</div><div class="line"><a name="l06618"></a><span class="lineno"> 6618</span>  << <span class="stringliteral">"Adding new interval constraints to partially filled model is not "</span></div><div class="line"><a name="l06619"></a><span class="lineno"> 6619</span>  <span class="stringliteral">"supported."</span>;</div><div class="line"><a name="l06620"></a><span class="lineno"> 6620</span>  interval_mapping_[c] = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#aeaf0da781ca9b370d96b7fbd3f74266a">constraints_size</a>();</div><div class="line"><a name="l06621"></a><span class="lineno"> 6621</span>  *context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>() = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>;</div><div class="line"><a name="l06622"></a><span class="lineno"> 6622</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l06623"></a><span class="lineno"> 6623</span> }</div><div class="line"><a name="l06624"></a><span class="lineno"> 6624</span> </div><div class="line"><a name="l06625"></a><span class="lineno"> 6625</span> <span class="keywordtype">bool</span> ModelCopy::CreateUnsatModel() {</div><div class="line"><a name="l06626"></a><span class="lineno"> 6626</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a9b3e1bc8b76ea7d2614fd7ec2b066039">mutable_constraints</a>()-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#aa0d2b6ddea7cb960b90423ac48f555bf">Clear</a>();</div><div class="line"><a name="l06627"></a><span class="lineno"> 6627</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>()-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ae26e2a099b411b50dd1d4c6605837d0a">mutable_bool_or</a>();</div><div class="line"><a name="l06628"></a><span class="lineno"> 6628</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l06629"></a><span class="lineno"> 6629</span> }</div><div class="line"><a name="l06630"></a><span class="lineno"> 6630</span> </div><div class="line"><a name="l06631"></a><span class="lineno"><a class="line" href="namespaceoperations__research_1_1sat.html#a980f3e04f0fac2f0f8a7ff4c73572922"> 6631</a></span> <span class="keywordtype">bool</span> <a class="code" href="namespaceoperations__research_1_1sat.html#a980f3e04f0fac2f0f8a7ff4c73572922">ImportConstraintsWithBasicPresolveIntoContext</a>(<span class="keyword">const</span> <a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html">CpModelProto</a>& in_model,</div><div class="line"><a name="l06632"></a><span class="lineno"> 6632</span>  <a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html">PresolveContext</a>* <a class="code" href="gurobi__interface_8cc.html#a5f287b83a753915ae862fed64f8640a6">context</a>) {</div><div class="line"><a name="l06633"></a><span class="lineno"> 6633</span>  <a class="code" href="classoperations__research_1_1sat_1_1_model_copy.html">ModelCopy</a> copier(<a class="code" href="gurobi__interface_8cc.html#a5f287b83a753915ae862fed64f8640a6">context</a>);</div><div class="line"><a name="l06634"></a><span class="lineno"> 6634</span>  <span class="keywordflow">if</span> (copier.<a class="code" href="classoperations__research_1_1sat_1_1_model_copy.html#ad74e75903c729a01bd681095bd51ff4e">ImportAndSimplifyConstraints</a>(in_model, {})) {</div><div class="line"><a name="l06635"></a><span class="lineno"> 6635</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a8e28f522e1d211cabbdcff4fd3028593">CopyEverythingExceptVariablesAndConstraintsFieldsIntoContext</a>(in_model,</div><div class="line"><a name="l06636"></a><span class="lineno"> 6636</span>  <a class="code" href="gurobi__interface_8cc.html#a5f287b83a753915ae862fed64f8640a6">context</a>);</div><div class="line"><a name="l06637"></a><span class="lineno"> 6637</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l06638"></a><span class="lineno"> 6638</span>  }</div><div class="line"><a name="l06639"></a><span class="lineno"> 6639</span>  <span class="keywordflow">return</span> <a class="code" href="gurobi__interface_8cc.html#a5f287b83a753915ae862fed64f8640a6">context</a>->NotifyThatModelIsUnsat();</div><div class="line"><a name="l06640"></a><span class="lineno"> 6640</span> }</div><div class="line"><a name="l06641"></a><span class="lineno"> 6641</span> </div><div class="line"><a name="l06642"></a><span class="lineno"><a class="line" href="namespaceoperations__research_1_1sat.html#a8e28f522e1d211cabbdcff4fd3028593"> 6642</a></span> <span class="keywordtype">void</span> <a class="code" href="namespaceoperations__research_1_1sat.html#a8e28f522e1d211cabbdcff4fd3028593">CopyEverythingExceptVariablesAndConstraintsFieldsIntoContext</a>(</div><div class="line"><a name="l06643"></a><span class="lineno"> 6643</span>  <span class="keyword">const</span> <a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html">CpModelProto</a>& in_model, <a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html">PresolveContext</a>* <a class="code" href="gurobi__interface_8cc.html#a5f287b83a753915ae862fed64f8640a6">context</a>) {</div><div class="line"><a name="l06644"></a><span class="lineno"> 6644</span>  <span class="keywordflow">if</span> (!in_model.<a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a24dcbf29c0d6cd766009a182a6484e3b">name</a>().empty()) {</div><div class="line"><a name="l06645"></a><span class="lineno"> 6645</span>  <a class="code" href="gurobi__interface_8cc.html#a5f287b83a753915ae862fed64f8640a6">context</a>->working_model->set_name(in_model.<a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a24dcbf29c0d6cd766009a182a6484e3b">name</a>());</div><div class="line"><a name="l06646"></a><span class="lineno"> 6646</span>  }</div><div class="line"><a name="l06647"></a><span class="lineno"> 6647</span>  <span class="keywordflow">if</span> (in_model.<a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a777a6e330a22a8889389cb9b9c9f12d6">has_objective</a>()) {</div><div class="line"><a name="l06648"></a><span class="lineno"> 6648</span>  *<a class="code" href="gurobi__interface_8cc.html#a5f287b83a753915ae862fed64f8640a6">context</a>->working_model->mutable_objective() = in_model.<a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a2787b866382b560920d55ce5cf129920">objective</a>();</div><div class="line"><a name="l06649"></a><span class="lineno"> 6649</span>  }</div><div class="line"><a name="l06650"></a><span class="lineno"> 6650</span>  <span class="keywordflow">if</span> (!in_model.<a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a6e5a7240e89f8a6665de1da5554603ec">search_strategy</a>().empty()) {</div><div class="line"><a name="l06651"></a><span class="lineno"> 6651</span>  *<a class="code" href="gurobi__interface_8cc.html#a5f287b83a753915ae862fed64f8640a6">context</a>->working_model->mutable_search_strategy() =</div><div class="line"><a name="l06652"></a><span class="lineno"> 6652</span>  in_model.<a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a6e5a7240e89f8a6665de1da5554603ec">search_strategy</a>();</div><div class="line"><a name="l06653"></a><span class="lineno"> 6653</span>  }</div><div class="line"><a name="l06654"></a><span class="lineno"> 6654</span>  <span class="keywordflow">if</span> (!in_model.<a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ae4e8815b1f4564c29618b0fb285908fb">assumptions</a>().empty()) {</div><div class="line"><a name="l06655"></a><span class="lineno"> 6655</span>  *<a class="code" href="gurobi__interface_8cc.html#a5f287b83a753915ae862fed64f8640a6">context</a>->working_model->mutable_assumptions() = in_model.<a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ae4e8815b1f4564c29618b0fb285908fb">assumptions</a>();</div><div class="line"><a name="l06656"></a><span class="lineno"> 6656</span>  }</div><div class="line"><a name="l06657"></a><span class="lineno"> 6657</span>  <span class="keywordflow">if</span> (in_model.<a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#aec7ffd8f1ec4359ef4f203b49b34391e">has_symmetry</a>()) {</div><div class="line"><a name="l06658"></a><span class="lineno"> 6658</span>  *<a class="code" href="gurobi__interface_8cc.html#a5f287b83a753915ae862fed64f8640a6">context</a>->working_model->mutable_symmetry() = in_model.<a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ab1fa807713e298b5262f1b6085834b69">symmetry</a>();</div><div class="line"><a name="l06659"></a><span class="lineno"> 6659</span>  }</div><div class="line"><a name="l06660"></a><span class="lineno"> 6660</span>  <span class="keywordflow">if</span> (in_model.<a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ab814c1d1d979ab21fba480d4f2184f0c">has_solution_hint</a>()) {</div><div class="line"><a name="l06661"></a><span class="lineno"> 6661</span>  *<a class="code" href="gurobi__interface_8cc.html#a5f287b83a753915ae862fed64f8640a6">context</a>->working_model->mutable_solution_hint() = in_model.<a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a7023490b4c4f4235f15ae455b0e7bfca">solution_hint</a>();</div><div class="line"><a name="l06662"></a><span class="lineno"> 6662</span>  }</div><div class="line"><a name="l06663"></a><span class="lineno"> 6663</span> }</div><div class="line"><a name="l06664"></a><span class="lineno"> 6664</span> </div><div class="line"><a name="l06665"></a><span class="lineno"> 6665</span> <span class="comment">// =============================================================================</span></div><div class="line"><a name="l06666"></a><span class="lineno"> 6666</span> <span class="comment">// Public API.</span></div><div class="line"><a name="l06667"></a><span class="lineno"> 6667</span> <span class="comment">// =============================================================================</span></div><div class="line"><a name="l06668"></a><span class="lineno"> 6668</span> </div><div class="line"><a name="l06669"></a><span class="lineno"><a class="line" href="namespaceoperations__research_1_1sat.html#a5921e7fd881f9a30b1ccb2c90ed672c8"> 6669</a></span> <span class="keywordtype">bool</span> <a class="code" href="namespaceoperations__research_1_1sat.html#a5921e7fd881f9a30b1ccb2c90ed672c8">PresolveCpModel</a>(<a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html">PresolveContext</a>* <a class="code" href="gurobi__interface_8cc.html#a5f287b83a753915ae862fed64f8640a6">context</a>,</div><div class="line"><a name="l06670"></a><span class="lineno"> 6670</span>  std::vector<int>* postsolve_mapping) {</div><div class="line"><a name="l06671"></a><span class="lineno"> 6671</span>  <a class="code" href="classoperations__research_1_1sat_1_1_cp_model_presolver.html">CpModelPresolver</a> presolver(<a class="code" href="gurobi__interface_8cc.html#a5f287b83a753915ae862fed64f8640a6">context</a>, postsolve_mapping);</div><div class="line"><a name="l06672"></a><span class="lineno"> 6672</span>  <span class="keywordflow">return</span> presolver.<a class="code" href="classoperations__research_1_1sat_1_1_cp_model_presolver.html#a4357280dffaba15fcb7f932afe0aea3f">Presolve</a>();</div><div class="line"><a name="l06673"></a><span class="lineno"> 6673</span> }</div><div class="line"><a name="l06674"></a><span class="lineno"> 6674</span> </div><div class="line"><a name="l06675"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_cp_model_presolver.html#a7ebb6a65cb3d0da1dcf19929c38640e0"> 6675</a></span> <a class="code" href="classoperations__research_1_1sat_1_1_cp_model_presolver.html#a7ebb6a65cb3d0da1dcf19929c38640e0">CpModelPresolver::CpModelPresolver</a>(<a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html">PresolveContext</a>* <a class="code" href="gurobi__interface_8cc.html#a5f287b83a753915ae862fed64f8640a6">context</a>,</div><div class="line"><a name="l06676"></a><span class="lineno"> 6676</span>  std::vector<int>* postsolve_mapping)</div><div class="line"><a name="l06677"></a><span class="lineno"> 6677</span>  : postsolve_mapping_(postsolve_mapping),</div><div class="line"><a name="l06678"></a><span class="lineno"> 6678</span>  context_(<a class="code" href="gurobi__interface_8cc.html#a5f287b83a753915ae862fed64f8640a6">context</a>),</div><div class="line"><a name="l06679"></a><span class="lineno"> 6679</span>  logger_(<a class="code" href="gurobi__interface_8cc.html#a5f287b83a753915ae862fed64f8640a6">context</a>->logger()) {</div><div class="line"><a name="l06680"></a><span class="lineno"> 6680</span>  <span class="comment">// TODO(user): move in the context.</span></div><div class="line"><a name="l06681"></a><span class="lineno"> 6681</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab7b13b808e3dea6fc1e4006f7134e9f9">keep_all_feasible_solutions</a> =</div><div class="line"><a name="l06682"></a><span class="lineno"> 6682</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aaabb604ccac4a6136be93bfe64e2290d">params</a>().<a class="code" href="classoperations__research_1_1sat_1_1_sat_parameters.html#a403eae27b83e71f1266efbbd1f4d9766">keep_all_feasible_solutions_in_presolve</a>() ||</div><div class="line"><a name="l06683"></a><span class="lineno"> 6683</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aaabb604ccac4a6136be93bfe64e2290d">params</a>().<a class="code" href="classoperations__research_1_1sat_1_1_sat_parameters.html#a180d2b6ac73a2f0e7c2162f1083d34eb">enumerate_all_solutions</a>() ||</div><div class="line"><a name="l06684"></a><span class="lineno"> 6684</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aaabb604ccac4a6136be93bfe64e2290d">params</a>().<a class="code" href="classoperations__research_1_1sat_1_1_sat_parameters.html#a9b190b6619c62f2eeb12a734adea72c9">fill_tightened_domains_in_response</a>() ||</div><div class="line"><a name="l06685"></a><span class="lineno"> 6685</span>  !context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ae4e8815b1f4564c29618b0fb285908fb">assumptions</a>().empty() ||</div><div class="line"><a name="l06686"></a><span class="lineno"> 6686</span>  !context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aaabb604ccac4a6136be93bfe64e2290d">params</a>().<a class="code" href="classoperations__research_1_1sat_1_1_sat_parameters.html#a9af17b6ddda9a6cc8d20fb3a19d9135f">cp_model_presolve</a>();</div><div class="line"><a name="l06687"></a><span class="lineno"> 6687</span> </div><div class="line"><a name="l06688"></a><span class="lineno"> 6688</span>  <span class="comment">// We copy the search strategy to the mapping_model.</span></div><div class="line"><a name="l06689"></a><span class="lineno"> 6689</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span>& decision_strategy :</div><div class="line"><a name="l06690"></a><span class="lineno"> 6690</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a6e5a7240e89f8a6665de1da5554603ec">search_strategy</a>()) {</div><div class="line"><a name="l06691"></a><span class="lineno"> 6691</span>  *(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a4b3b9ef9c5f214dd4427daa2646eceda">mapping_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a0e86147138c8f8bb3380a6824534f90a">add_search_strategy</a>()) = decision_strategy;</div><div class="line"><a name="l06692"></a><span class="lineno"> 6692</span>  }</div><div class="line"><a name="l06693"></a><span class="lineno"> 6693</span> </div><div class="line"><a name="l06694"></a><span class="lineno"> 6694</span>  <span class="comment">// Initialize the initial context.working_model domains.</span></div><div class="line"><a name="l06695"></a><span class="lineno"> 6695</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a62cd771660767621e917b2c256182c4e">InitializeNewDomains</a>();</div><div class="line"><a name="l06696"></a><span class="lineno"> 6696</span> </div><div class="line"><a name="l06697"></a><span class="lineno"> 6697</span>  <span class="comment">// Initialize the objective.</span></div><div class="line"><a name="l06698"></a><span class="lineno"> 6698</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aed2a07aad05b4ad8e05cf5fe7b239a1a">ReadObjectiveFromProto</a>();</div><div class="line"><a name="l06699"></a><span class="lineno"> 6699</span>  (void)context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa62da782b2270ca293531a0aea153fba">CanonicalizeObjective</a>();</div><div class="line"><a name="l06700"></a><span class="lineno"> 6700</span> </div><div class="line"><a name="l06701"></a><span class="lineno"> 6701</span>  <span class="comment">// Note that we delay the call to UpdateNewConstraintsVariableUsage() for</span></div><div class="line"><a name="l06702"></a><span class="lineno"> 6702</span>  <span class="comment">// efficiency during LNS presolve.</span></div><div class="line"><a name="l06703"></a><span class="lineno"> 6703</span> }</div><div class="line"><a name="l06704"></a><span class="lineno"> 6704</span> </div><div class="line"><a name="l06705"></a><span class="lineno"> 6705</span> <span class="comment">// The presolve works as follow:</span></div><div class="line"><a name="l06706"></a><span class="lineno"> 6706</span> <span class="comment">//</span></div><div class="line"><a name="l06707"></a><span class="lineno"> 6707</span> <span class="comment">// First stage:</span></div><div class="line"><a name="l06708"></a><span class="lineno"> 6708</span> <span class="comment">// We will process all active constraints until a fix point is reached. During</span></div><div class="line"><a name="l06709"></a><span class="lineno"> 6709</span> <span class="comment">// this stage:</span></div><div class="line"><a name="l06710"></a><span class="lineno"> 6710</span> <span class="comment">// - Variable will never be deleted, but their domain will be reduced.</span></div><div class="line"><a name="l06711"></a><span class="lineno"> 6711</span> <span class="comment">// - Constraint will never be deleted (they will be marked as empty if needed).</span></div><div class="line"><a name="l06712"></a><span class="lineno"> 6712</span> <span class="comment">// - New variables and new constraints can be added after the existing ones.</span></div><div class="line"><a name="l06713"></a><span class="lineno"> 6713</span> <span class="comment">// - Constraints are added only when needed to the mapping_problem if they are</span></div><div class="line"><a name="l06714"></a><span class="lineno"> 6714</span> <span class="comment">// needed during the postsolve.</span></div><div class="line"><a name="l06715"></a><span class="lineno"> 6715</span> <span class="comment">//</span></div><div class="line"><a name="l06716"></a><span class="lineno"> 6716</span> <span class="comment">// Second stage:</span></div><div class="line"><a name="l06717"></a><span class="lineno"> 6717</span> <span class="comment">// - All the variables domain will be copied to the mapping_model.</span></div><div class="line"><a name="l06718"></a><span class="lineno"> 6718</span> <span class="comment">// - Everything will be remapped so that only the variables appearing in some</span></div><div class="line"><a name="l06719"></a><span class="lineno"> 6719</span> <span class="comment">// constraints will be kept and their index will be in [0, num_new_variables).</span></div><div class="line"><a name="l06720"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_cp_model_presolver.html#a4357280dffaba15fcb7f932afe0aea3f"> 6720</a></span> <span class="keywordtype">bool</span> <a class="code" href="classoperations__research_1_1sat_1_1_cp_model_presolver.html#a4357280dffaba15fcb7f932afe0aea3f">CpModelPresolver::Presolve</a>() {</div><div class="line"><a name="l06721"></a><span class="lineno"> 6721</span>  <span class="comment">// If presolve is false, just run expansion.</span></div><div class="line"><a name="l06722"></a><span class="lineno"> 6722</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aaabb604ccac4a6136be93bfe64e2290d">params</a>().<a class="code" href="classoperations__research_1_1sat_1_1_sat_parameters.html#a9af17b6ddda9a6cc8d20fb3a19d9135f">cp_model_presolve</a>()) {</div><div class="line"><a name="l06723"></a><span class="lineno"> 6723</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l06724"></a><span class="lineno"> 6724</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a4d700795b2500705ef3031ec994fe472">ExpandCpModel</a>(context_);</div><div class="line"><a name="l06725"></a><span class="lineno"> 6725</span>  <span class="keywordflow">if</span> (logger_-><a class="code" href="classoperations__research_1_1_solver_logger.html#a9492cb97f5ec0ecbce0b5ef1b085738b">LoggingIsEnabled</a>()) context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a40432f5ffa1ea8255071161d96f598d1">LogInfo</a>();</div><div class="line"><a name="l06726"></a><span class="lineno"> 6726</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l06727"></a><span class="lineno"> 6727</span>  }</div><div class="line"><a name="l06728"></a><span class="lineno"> 6728</span> </div><div class="line"><a name="l06729"></a><span class="lineno"> 6729</span>  <span class="comment">// Before initializing the constraint <-> variable graph (which is costly), we</span></div><div class="line"><a name="l06730"></a><span class="lineno"> 6730</span>  <span class="comment">// run a bunch of simple presolve rules. Note that these function should NOT</span></div><div class="line"><a name="l06731"></a><span class="lineno"> 6731</span>  <span class="comment">// use the graph, or the part that uses it should properly check for</span></div><div class="line"><a name="l06732"></a><span class="lineno"> 6732</span>  <span class="comment">// context_->ConstraintVariableGraphIsUpToDate() before doing anything that</span></div><div class="line"><a name="l06733"></a><span class="lineno"> 6733</span>  <span class="comment">// depends on the graph.</span></div><div class="line"><a name="l06734"></a><span class="lineno"> 6734</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> c = 0; c < context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#aeaf0da781ca9b370d96b7fbd3f74266a">constraints_size</a>(); ++c) {</div><div class="line"><a name="l06735"></a><span class="lineno"> 6735</span>  <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html">ConstraintProto</a>* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a> = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a9b3e1bc8b76ea7d2614fd7ec2b066039">mutable_constraints</a>(c);</div><div class="line"><a name="l06736"></a><span class="lineno"> 6736</span>  PresolveEnforcementLiteral(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l06737"></a><span class="lineno"> 6737</span>  <span class="keywordflow">switch</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->constraint_case()) {</div><div class="line"><a name="l06738"></a><span class="lineno"> 6738</span>  <span class="keywordflow">case</span> ConstraintProto::ConstraintCase::kBoolOr:</div><div class="line"><a name="l06739"></a><span class="lineno"> 6739</span>  PresolveBoolOr(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l06740"></a><span class="lineno"> 6740</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l06741"></a><span class="lineno"> 6741</span>  <span class="keywordflow">case</span> ConstraintProto::ConstraintCase::kBoolAnd:</div><div class="line"><a name="l06742"></a><span class="lineno"> 6742</span>  PresolveBoolAnd(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l06743"></a><span class="lineno"> 6743</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l06744"></a><span class="lineno"> 6744</span>  <span class="keywordflow">case</span> ConstraintProto::ConstraintCase::kAtMostOne:</div><div class="line"><a name="l06745"></a><span class="lineno"> 6745</span>  PresolveAtMostOne(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l06746"></a><span class="lineno"> 6746</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l06747"></a><span class="lineno"> 6747</span>  <span class="keywordflow">case</span> ConstraintProto::ConstraintCase::kExactlyOne:</div><div class="line"><a name="l06748"></a><span class="lineno"> 6748</span>  PresolveExactlyOne(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l06749"></a><span class="lineno"> 6749</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l06750"></a><span class="lineno"> 6750</span>  <span class="keywordflow">case</span> ConstraintProto::ConstraintCase::kLinear:</div><div class="line"><a name="l06751"></a><span class="lineno"> 6751</span>  CanonicalizeLinear(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l06752"></a><span class="lineno"> 6752</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l06753"></a><span class="lineno"> 6753</span>  <span class="keywordflow">default</span>:</div><div class="line"><a name="l06754"></a><span class="lineno"> 6754</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l06755"></a><span class="lineno"> 6755</span>  }</div><div class="line"><a name="l06756"></a><span class="lineno"> 6756</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) <span class="keywordflow">break</span>;</div><div class="line"><a name="l06757"></a><span class="lineno"> 6757</span>  }</div><div class="line"><a name="l06758"></a><span class="lineno"> 6758</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l06759"></a><span class="lineno"> 6759</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af35921d036d22c6497777d7a5964a13d">RegisterVariablesUsedInAssumptions</a>();</div><div class="line"><a name="l06760"></a><span class="lineno"> 6760</span>  <a class="code" href="base_2logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a>(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a11f5290ed8216eea13b9d7383cb4c55f">ConstraintVariableUsageIsConsistent</a>());</div><div class="line"><a name="l06761"></a><span class="lineno"> 6761</span> </div><div class="line"><a name="l06762"></a><span class="lineno"> 6762</span>  <span class="comment">// Main propagation loop.</span></div><div class="line"><a name="l06763"></a><span class="lineno"> 6763</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> iter = 0; iter < context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aaabb604ccac4a6136be93bfe64e2290d">params</a>().<a class="code" href="classoperations__research_1_1sat_1_1_sat_parameters.html#a38fa8a83b252655a3659e619f1fe120e">max_presolve_iterations</a>();</div><div class="line"><a name="l06764"></a><span class="lineno"> 6764</span>  ++iter) {</div><div class="line"><a name="l06765"></a><span class="lineno"> 6765</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"presolve: iteration"</span>);</div><div class="line"><a name="l06766"></a><span class="lineno"> 6766</span>  <span class="comment">// Save some quantities to decide if we abort early the iteration loop.</span></div><div class="line"><a name="l06767"></a><span class="lineno"> 6767</span>  <span class="keyword">const</span> int64_t old_num_presolve_op = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5f9c1ea2555cc36fcd716296e54ed17a">num_presolve_operations</a>;</div><div class="line"><a name="l06768"></a><span class="lineno"> 6768</span>  <span class="keywordtype">int</span> old_num_non_empty_constraints = 0;</div><div class="line"><a name="l06769"></a><span class="lineno"> 6769</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> c = 0; c < context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#aeaf0da781ca9b370d96b7fbd3f74266a">constraints_size</a>(); ++c) {</div><div class="line"><a name="l06770"></a><span class="lineno"> 6770</span>  <span class="keyword">const</span> <span class="keyword">auto</span> type =</div><div class="line"><a name="l06771"></a><span class="lineno"> 6771</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#afce66afa8ae7776a449bba7313ea3559">constraints</a>(c).<a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a5f9869899e2c94786f9709684f1ecc56">constraint_case</a>();</div><div class="line"><a name="l06772"></a><span class="lineno"> 6772</span>  <span class="keywordflow">if</span> (type == ConstraintProto::ConstraintCase::CONSTRAINT_NOT_SET) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l06773"></a><span class="lineno"> 6773</span>  old_num_non_empty_constraints++;</div><div class="line"><a name="l06774"></a><span class="lineno"> 6774</span>  }</div><div class="line"><a name="l06775"></a><span class="lineno"> 6775</span> </div><div class="line"><a name="l06776"></a><span class="lineno"> 6776</span>  <span class="comment">// TODO(user): The presolve transformations we do after this is called might</span></div><div class="line"><a name="l06777"></a><span class="lineno"> 6777</span>  <span class="comment">// result in even more presolve if we were to call this again! improve the</span></div><div class="line"><a name="l06778"></a><span class="lineno"> 6778</span>  <span class="comment">// code. See for instance plusexample_6_sat.fzn were represolving the</span></div><div class="line"><a name="l06779"></a><span class="lineno"> 6779</span>  <span class="comment">// presolved problem reduces it even more.</span></div><div class="line"><a name="l06780"></a><span class="lineno"> 6780</span>  PresolveToFixPoint();</div><div class="line"><a name="l06781"></a><span class="lineno"> 6781</span> </div><div class="line"><a name="l06782"></a><span class="lineno"> 6782</span>  <span class="comment">// Call expansion.</span></div><div class="line"><a name="l06783"></a><span class="lineno"> 6783</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a4d700795b2500705ef3031ec994fe472">ExpandCpModel</a>(context_);</div><div class="line"><a name="l06784"></a><span class="lineno"> 6784</span>  <a class="code" href="base_2logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a>(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a11f5290ed8216eea13b9d7383cb4c55f">ConstraintVariableUsageIsConsistent</a>());</div><div class="line"><a name="l06785"></a><span class="lineno"> 6785</span> </div><div class="line"><a name="l06786"></a><span class="lineno"> 6786</span>  <span class="comment">// TODO(user): do that and the pure-SAT part below more than once.</span></div><div class="line"><a name="l06787"></a><span class="lineno"> 6787</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aaabb604ccac4a6136be93bfe64e2290d">params</a>().<a class="code" href="classoperations__research_1_1sat_1_1_sat_parameters.html#a40d72bf6df642a2d31d6f579ab08c633">cp_model_probing_level</a>() > 0) {</div><div class="line"><a name="l06788"></a><span class="lineno"> 6788</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a0704cc50211ab739309aa9f54aa8c606">time_limit</a>()-><a class="code" href="classoperations__research_1_1_time_limit.html#a810d5f7aaf80cc09cf5a094e20c1aaca">LimitReached</a>()) {</div><div class="line"><a name="l06789"></a><span class="lineno"> 6789</span>  Probe();</div><div class="line"><a name="l06790"></a><span class="lineno"> 6790</span>  PresolveToFixPoint();</div><div class="line"><a name="l06791"></a><span class="lineno"> 6791</span>  }</div><div class="line"><a name="l06792"></a><span class="lineno"> 6792</span>  }</div><div class="line"><a name="l06793"></a><span class="lineno"> 6793</span> </div><div class="line"><a name="l06794"></a><span class="lineno"> 6794</span>  <span class="comment">// Runs SAT specific presolve on the pure-SAT part of the problem.</span></div><div class="line"><a name="l06795"></a><span class="lineno"> 6795</span>  <span class="comment">// Note that because this can only remove/fix variable not used in the other</span></div><div class="line"><a name="l06796"></a><span class="lineno"> 6796</span>  <span class="comment">// part of the problem, there is no need to redo more presolve afterwards.</span></div><div class="line"><a name="l06797"></a><span class="lineno"> 6797</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aaabb604ccac4a6136be93bfe64e2290d">params</a>().<a class="code" href="classoperations__research_1_1sat_1_1_sat_parameters.html#a182ebf1d57d890d4cb639e5dbaaafd0d">cp_model_use_sat_presolve</a>()) {</div><div class="line"><a name="l06798"></a><span class="lineno"> 6798</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a0704cc50211ab739309aa9f54aa8c606">time_limit</a>()-><a class="code" href="classoperations__research_1_1_time_limit.html#a810d5f7aaf80cc09cf5a094e20c1aaca">LimitReached</a>()) {</div><div class="line"><a name="l06799"></a><span class="lineno"> 6799</span>  PresolvePureSatPart();</div><div class="line"><a name="l06800"></a><span class="lineno"> 6800</span>  }</div><div class="line"><a name="l06801"></a><span class="lineno"> 6801</span>  }</div><div class="line"><a name="l06802"></a><span class="lineno"> 6802</span> </div><div class="line"><a name="l06803"></a><span class="lineno"> 6803</span>  <span class="comment">// Extract redundant at most one constraint form the linear ones.</span></div><div class="line"><a name="l06804"></a><span class="lineno"> 6804</span>  <span class="comment">//</span></div><div class="line"><a name="l06805"></a><span class="lineno"> 6805</span>  <span class="comment">// TODO(user): more generally if we do some probing, the same relation will</span></div><div class="line"><a name="l06806"></a><span class="lineno"> 6806</span>  <span class="comment">// be detected (and more). Also add an option to turn this off?</span></div><div class="line"><a name="l06807"></a><span class="lineno"> 6807</span>  <span class="comment">//</span></div><div class="line"><a name="l06808"></a><span class="lineno"> 6808</span>  <span class="comment">// TODO(user): instead of extracting at most one, extract pairwise conflicts</span></div><div class="line"><a name="l06809"></a><span class="lineno"> 6809</span>  <span class="comment">// and add them to bool_and clauses? this is some sort of small scale</span></div><div class="line"><a name="l06810"></a><span class="lineno"> 6810</span>  <span class="comment">// probing, but good for sat presolve and clique later?</span></div><div class="line"><a name="l06811"></a><span class="lineno"> 6811</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>() && iter == 0) {</div><div class="line"><a name="l06812"></a><span class="lineno"> 6812</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> old_size = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#aeaf0da781ca9b370d96b7fbd3f74266a">constraints_size</a>();</div><div class="line"><a name="l06813"></a><span class="lineno"> 6813</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> c = 0; c < old_size; ++c) {</div><div class="line"><a name="l06814"></a><span class="lineno"> 6814</span>  <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html">ConstraintProto</a>* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a> = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a9b3e1bc8b76ea7d2614fd7ec2b066039">mutable_constraints</a>(c);</div><div class="line"><a name="l06815"></a><span class="lineno"> 6815</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>->constraint_case() != ConstraintProto::ConstraintCase::kLinear) {</div><div class="line"><a name="l06816"></a><span class="lineno"> 6816</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l06817"></a><span class="lineno"> 6817</span>  }</div><div class="line"><a name="l06818"></a><span class="lineno"> 6818</span>  ExtractAtMostOneFromLinear(<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div><div class="line"><a name="l06819"></a><span class="lineno"> 6819</span>  }</div><div class="line"><a name="l06820"></a><span class="lineno"> 6820</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">UpdateNewConstraintsVariableUsage</a>();</div><div class="line"><a name="l06821"></a><span class="lineno"> 6821</span>  }</div><div class="line"><a name="l06822"></a><span class="lineno"> 6822</span> </div><div class="line"><a name="l06823"></a><span class="lineno"> 6823</span>  <span class="keywordflow">if</span> (iter == 0) TransformIntoMaxCliques();</div><div class="line"><a name="l06824"></a><span class="lineno"> 6824</span> </div><div class="line"><a name="l06825"></a><span class="lineno"> 6825</span>  <span class="comment">// TODO(user): Decide where is the best place for this. Fow now we do it</span></div><div class="line"><a name="l06826"></a><span class="lineno"> 6826</span>  <span class="comment">// after max clique to get all the bool_and converted to at most ones.</span></div><div class="line"><a name="l06827"></a><span class="lineno"> 6827</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aaabb604ccac4a6136be93bfe64e2290d">params</a>().<a class="code" href="classoperations__research_1_1sat_1_1_sat_parameters.html#a07e94edcd38352036aab52d849109414">symmetry_level</a>() > 0 && !context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>() &&</div><div class="line"><a name="l06828"></a><span class="lineno"> 6828</span>  !context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a0704cc50211ab739309aa9f54aa8c606">time_limit</a>()-><a class="code" href="classoperations__research_1_1_time_limit.html#a810d5f7aaf80cc09cf5a094e20c1aaca">LimitReached</a>() &&</div><div class="line"><a name="l06829"></a><span class="lineno"> 6829</span>  !context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab7b13b808e3dea6fc1e4006f7134e9f9">keep_all_feasible_solutions</a>) {</div><div class="line"><a name="l06830"></a><span class="lineno"> 6830</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a1b24f74de50e3483bbefacffcd349eb1">DetectAndExploitSymmetriesInPresolve</a>(context_);</div><div class="line"><a name="l06831"></a><span class="lineno"> 6831</span>  }</div><div class="line"><a name="l06832"></a><span class="lineno"> 6832</span> </div><div class="line"><a name="l06833"></a><span class="lineno"> 6833</span>  <span class="comment">// Process set packing, partitioning and covering constraint.</span></div><div class="line"><a name="l06834"></a><span class="lineno"> 6834</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a0704cc50211ab739309aa9f54aa8c606">time_limit</a>()-><a class="code" href="classoperations__research_1_1_time_limit.html#a810d5f7aaf80cc09cf5a094e20c1aaca">LimitReached</a>()) {</div><div class="line"><a name="l06835"></a><span class="lineno"> 6835</span>  ProcessSetPPC();</div><div class="line"><a name="l06836"></a><span class="lineno"> 6836</span>  ExtractBoolAnd();</div><div class="line"><a name="l06837"></a><span class="lineno"> 6837</span> </div><div class="line"><a name="l06838"></a><span class="lineno"> 6838</span>  <span class="comment">// Call the main presolve to remove the fixed variables and do more</span></div><div class="line"><a name="l06839"></a><span class="lineno"> 6839</span>  <span class="comment">// deductions.</span></div><div class="line"><a name="l06840"></a><span class="lineno"> 6840</span>  PresolveToFixPoint();</div><div class="line"><a name="l06841"></a><span class="lineno"> 6841</span>  }</div><div class="line"><a name="l06842"></a><span class="lineno"> 6842</span> </div><div class="line"><a name="l06843"></a><span class="lineno"> 6843</span>  <span class="comment">// Exit the loop if the reduction is not so large.</span></div><div class="line"><a name="l06844"></a><span class="lineno"> 6844</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5f9c1ea2555cc36fcd716296e54ed17a">num_presolve_operations</a> - old_num_presolve_op <</div><div class="line"><a name="l06845"></a><span class="lineno"> 6845</span>  0.8 * (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#abef5f55c3278c137faca92b8e433f8ea">variables_size</a>() +</div><div class="line"><a name="l06846"></a><span class="lineno"> 6846</span>  old_num_non_empty_constraints)) {</div><div class="line"><a name="l06847"></a><span class="lineno"> 6847</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l06848"></a><span class="lineno"> 6848</span>  }</div><div class="line"><a name="l06849"></a><span class="lineno"> 6849</span>  }</div><div class="line"><a name="l06850"></a><span class="lineno"> 6850</span> </div><div class="line"><a name="l06851"></a><span class="lineno"> 6851</span>  <span class="comment">// Regroup no-overlaps into max-cliques.</span></div><div class="line"><a name="l06852"></a><span class="lineno"> 6852</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) {</div><div class="line"><a name="l06853"></a><span class="lineno"> 6853</span>  MergeNoOverlapConstraints();</div><div class="line"><a name="l06854"></a><span class="lineno"> 6854</span>  }</div><div class="line"><a name="l06855"></a><span class="lineno"> 6855</span> </div><div class="line"><a name="l06856"></a><span class="lineno"> 6856</span>  <span class="comment">// Tries to spread the objective amongst many variables.</span></div><div class="line"><a name="l06857"></a><span class="lineno"> 6857</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a777a6e330a22a8889389cb9b9c9f12d6">has_objective</a>() && !context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) {</div><div class="line"><a name="l06858"></a><span class="lineno"> 6858</span>  ExpandObjective();</div><div class="line"><a name="l06859"></a><span class="lineno"> 6859</span>  }</div><div class="line"><a name="l06860"></a><span class="lineno"> 6860</span> </div><div class="line"><a name="l06861"></a><span class="lineno"> 6861</span>  <span class="comment">// Adds all needed affine relation to context_->working_model.</span></div><div class="line"><a name="l06862"></a><span class="lineno"> 6862</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) {</div><div class="line"><a name="l06863"></a><span class="lineno"> 6863</span>  EncodeAllAffineRelations();</div><div class="line"><a name="l06864"></a><span class="lineno"> 6864</span>  }</div><div class="line"><a name="l06865"></a><span class="lineno"> 6865</span> </div><div class="line"><a name="l06866"></a><span class="lineno"> 6866</span>  <span class="comment">// Remove duplicate constraints.</span></div><div class="line"><a name="l06867"></a><span class="lineno"> 6867</span>  <span class="comment">//</span></div><div class="line"><a name="l06868"></a><span class="lineno"> 6868</span>  <span class="comment">// TODO(user): We might want to do that earlier so that our count of variable</span></div><div class="line"><a name="l06869"></a><span class="lineno"> 6869</span>  <span class="comment">// usage is not biased by duplicate constraints.</span></div><div class="line"><a name="l06870"></a><span class="lineno"> 6870</span>  <span class="keyword">const</span> std::vector<std::pair<int, int>> duplicates =</div><div class="line"><a name="l06871"></a><span class="lineno"> 6871</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a98b74f23742287a604f9850f26bcc06a">FindDuplicateConstraints</a>(*context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>);</div><div class="line"><a name="l06872"></a><span class="lineno"> 6872</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span> [dup, rep] : duplicates) {</div><div class="line"><a name="l06873"></a><span class="lineno"> 6873</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> type =</div><div class="line"><a name="l06874"></a><span class="lineno"> 6874</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#afce66afa8ae7776a449bba7313ea3559">constraints</a>(dup).<a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a5f9869899e2c94786f9709684f1ecc56">constraint_case</a>();</div><div class="line"><a name="l06875"></a><span class="lineno"> 6875</span>  <span class="keywordflow">if</span> (type == ConstraintProto::ConstraintCase::kInterval) {</div><div class="line"><a name="l06876"></a><span class="lineno"> 6876</span>  <span class="comment">// TODO(user): we could delete duplicate identical interval, but we need</span></div><div class="line"><a name="l06877"></a><span class="lineno"> 6877</span>  <span class="comment">// to make sure reference to them are updated.</span></div><div class="line"><a name="l06878"></a><span class="lineno"> 6878</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l06879"></a><span class="lineno"> 6879</span>  }</div><div class="line"><a name="l06880"></a><span class="lineno"> 6880</span> </div><div class="line"><a name="l06881"></a><span class="lineno"> 6881</span>  <span class="keywordflow">if</span> (type == <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35ac188c019178783e5be55110601309d7d">ConstraintProto::kLinear</a>) {</div><div class="line"><a name="l06882"></a><span class="lineno"> 6882</span>  <span class="keyword">const</span> <a class="code" href="classoperations__research_1_1_domain.html">Domain</a> d1 = <a class="code" href="namespaceoperations__research_1_1sat.html#ab1240060466ba48a36a4b36379bce26a">ReadDomainFromProto</a>(</div><div class="line"><a name="l06883"></a><span class="lineno"> 6883</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#afce66afa8ae7776a449bba7313ea3559">constraints</a>(rep).<a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a6d1f941c5f8b326673ffd58eb9b1f0ab">linear</a>());</div><div class="line"><a name="l06884"></a><span class="lineno"> 6884</span>  <span class="keyword">const</span> <a class="code" href="classoperations__research_1_1_domain.html">Domain</a> d2 = <a class="code" href="namespaceoperations__research_1_1sat.html#ab1240060466ba48a36a4b36379bce26a">ReadDomainFromProto</a>(</div><div class="line"><a name="l06885"></a><span class="lineno"> 6885</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#afce66afa8ae7776a449bba7313ea3559">constraints</a>(dup).<a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a6d1f941c5f8b326673ffd58eb9b1f0ab">linear</a>());</div><div class="line"><a name="l06886"></a><span class="lineno"> 6886</span>  <span class="keywordflow">if</span> (d1 != d2) {</div><div class="line"><a name="l06887"></a><span class="lineno"> 6887</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"duplicate: merged rhs of linear constraint"</span>);</div><div class="line"><a name="l06888"></a><span class="lineno"> 6888</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a901c19b12842f8af153e588a689a90b5">FillDomainInProto</a>(d1.<a class="code" href="classoperations__research_1_1_domain.html#a835826c4c5129b74553042a357a721ff">IntersectionWith</a>(d2),</div><div class="line"><a name="l06889"></a><span class="lineno"> 6889</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a9b3e1bc8b76ea7d2614fd7ec2b066039">mutable_constraints</a>(rep)</div><div class="line"><a name="l06890"></a><span class="lineno"> 6890</span>  -><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ad653c55b371ae98444295965c6622ddb">mutable_linear</a>());</div><div class="line"><a name="l06891"></a><span class="lineno"> 6891</span>  }</div><div class="line"><a name="l06892"></a><span class="lineno"> 6892</span>  }</div><div class="line"><a name="l06893"></a><span class="lineno"> 6893</span> </div><div class="line"><a name="l06894"></a><span class="lineno"> 6894</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a9b3e1bc8b76ea7d2614fd7ec2b066039">mutable_constraints</a>(dup)-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#aa0d2b6ddea7cb960b90423ac48f555bf">Clear</a>();</div><div class="line"><a name="l06895"></a><span class="lineno"> 6895</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab75a27c0aeda2de9c3957719b8196c36">UpdateConstraintVariableUsage</a>(dup);</div><div class="line"><a name="l06896"></a><span class="lineno"> 6896</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(<span class="stringliteral">"duplicate: removed constraint"</span>);</div><div class="line"><a name="l06897"></a><span class="lineno"> 6897</span>  }</div><div class="line"><a name="l06898"></a><span class="lineno"> 6898</span> </div><div class="line"><a name="l06899"></a><span class="lineno"> 6899</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">ModelIsUnsat</a>()) {</div><div class="line"><a name="l06900"></a><span class="lineno"> 6900</span>  <span class="keywordflow">if</span> (logger_-><a class="code" href="classoperations__research_1_1_solver_logger.html#a9492cb97f5ec0ecbce0b5ef1b085738b">LoggingIsEnabled</a>()) context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a40432f5ffa1ea8255071161d96f598d1">LogInfo</a>();</div><div class="line"><a name="l06901"></a><span class="lineno"> 6901</span> </div><div class="line"><a name="l06902"></a><span class="lineno"> 6902</span>  <span class="comment">// Set presolved_model to the simplest UNSAT problem (empty clause).</span></div><div class="line"><a name="l06903"></a><span class="lineno"> 6903</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#aa0d2b6ddea7cb960b90423ac48f555bf">Clear</a>();</div><div class="line"><a name="l06904"></a><span class="lineno"> 6904</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">add_constraints</a>()-><a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ae26e2a099b411b50dd1d4c6605837d0a">mutable_bool_or</a>();</div><div class="line"><a name="l06905"></a><span class="lineno"> 6905</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l06906"></a><span class="lineno"> 6906</span>  }</div><div class="line"><a name="l06907"></a><span class="lineno"> 6907</span> </div><div class="line"><a name="l06908"></a><span class="lineno"> 6908</span>  <span class="comment">// The strategy variable indices will be remapped in ApplyVariableMapping()</span></div><div class="line"><a name="l06909"></a><span class="lineno"> 6909</span>  <span class="comment">// but first we use the representative of the affine relations for the</span></div><div class="line"><a name="l06910"></a><span class="lineno"> 6910</span>  <span class="comment">// variables that are not present anymore.</span></div><div class="line"><a name="l06911"></a><span class="lineno"> 6911</span>  <span class="comment">//</span></div><div class="line"><a name="l06912"></a><span class="lineno"> 6912</span>  <span class="comment">// Note that we properly take into account the sign of the coefficient which</span></div><div class="line"><a name="l06913"></a><span class="lineno"> 6913</span>  <span class="comment">// will result in the same domain reduction strategy. Moreover, if the</span></div><div class="line"><a name="l06914"></a><span class="lineno"> 6914</span>  <span class="comment">// variable order is not CHOOSE_FIRST, then we also encode the associated</span></div><div class="line"><a name="l06915"></a><span class="lineno"> 6915</span>  <span class="comment">// affine transformation in order to preserve the order.</span></div><div class="line"><a name="l06916"></a><span class="lineno"> 6916</span>  absl::flat_hash_set<int> used_variables;</div><div class="line"><a name="l06917"></a><span class="lineno"> 6917</span>  <span class="keywordflow">for</span> (<a class="code" href="classoperations__research_1_1sat_1_1_decision_strategy_proto.html">DecisionStrategyProto</a>& strategy :</div><div class="line"><a name="l06918"></a><span class="lineno"> 6918</span>  *context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a40a4b138f2c2868e312e489fabb55ea5">mutable_search_strategy</a>()) {</div><div class="line"><a name="l06919"></a><span class="lineno"> 6919</span>  <a class="code" href="classoperations__research_1_1sat_1_1_decision_strategy_proto.html">DecisionStrategyProto</a> copy = strategy;</div><div class="line"><a name="l06920"></a><span class="lineno"> 6920</span>  strategy.<a class="code" href="classoperations__research_1_1sat_1_1_decision_strategy_proto.html#a97c353c23050b2faebd883435f73aa6e">clear_variables</a>();</div><div class="line"><a name="l06921"></a><span class="lineno"> 6921</span>  strategy.clear_transformations();</div><div class="line"><a name="l06922"></a><span class="lineno"> 6922</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keywordtype">int</span> ref : copy.<a class="code" href="classoperations__research_1_1sat_1_1_decision_strategy_proto.html#a7f79618db7151642a4a18ed2be4ac6e4">variables</a>()) {</div><div class="line"><a name="l06923"></a><span class="lineno"> 6923</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = <a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(ref);</div><div class="line"><a name="l06924"></a><span class="lineno"> 6924</span> </div><div class="line"><a name="l06925"></a><span class="lineno"> 6925</span>  <span class="comment">// Remove fixed variables.</span></div><div class="line"><a name="l06926"></a><span class="lineno"> 6926</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#abb6eb29f56c3a33b8ae1b74b08b755c2">IsFixed</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l06927"></a><span class="lineno"> 6927</span> </div><div class="line"><a name="l06928"></a><span class="lineno"> 6928</span>  <span class="comment">// There is not point having a variable appear twice, so we only keep</span></div><div class="line"><a name="l06929"></a><span class="lineno"> 6929</span>  <span class="comment">// the first occurrence in the first strategy in which it occurs.</span></div><div class="line"><a name="l06930"></a><span class="lineno"> 6930</span>  <span class="keywordflow">if</span> (<a class="code" href="namespacegtl.html#aae28e97bd1fa93cb0032642550da7455">gtl::ContainsKey</a>(used_variables, <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l06931"></a><span class="lineno"> 6931</span>  used_variables.insert(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l06932"></a><span class="lineno"> 6932</span> </div><div class="line"><a name="l06933"></a><span class="lineno"> 6933</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#acf72cafd3dab9ac4b5e5b1a3aaa75192">VarToConstraints</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>).empty()) {</div><div class="line"><a name="l06934"></a><span class="lineno"> 6934</span>  <span class="keyword">const</span> <a class="code" href="structoperations__research_1_1_affine_relation_1_1_relation.html">AffineRelation::Relation</a> r = context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aaddc5f58e8a40a5a308531949153f814">GetAffineRelation</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div><div class="line"><a name="l06935"></a><span class="lineno"> 6935</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#acf72cafd3dab9ac4b5e5b1a3aaa75192">VarToConstraints</a>(r.<a class="code" href="structoperations__research_1_1_affine_relation_1_1_relation.html#af5eb1e0745f18d589b9c552215bef515">representative</a>).empty()) {</div><div class="line"><a name="l06936"></a><span class="lineno"> 6936</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> rep = (r.<a class="code" href="structoperations__research_1_1_affine_relation_1_1_relation.html#a537e59662a0751edfbbd2a0079a794b4">coeff</a> > 0) == <a class="code" href="namespaceoperations__research_1_1sat.html#a217338425de4389014563f1f24331713">RefIsPositive</a>(ref)</div><div class="line"><a name="l06937"></a><span class="lineno"> 6937</span>  ? r.<a class="code" href="structoperations__research_1_1_affine_relation_1_1_relation.html#af5eb1e0745f18d589b9c552215bef515">representative</a></div><div class="line"><a name="l06938"></a><span class="lineno"> 6938</span>  : <a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(r.<a class="code" href="structoperations__research_1_1_affine_relation_1_1_relation.html#af5eb1e0745f18d589b9c552215bef515">representative</a>);</div><div class="line"><a name="l06939"></a><span class="lineno"> 6939</span>  <span class="keywordflow">if</span> (strategy.variable_selection_strategy() !=</div><div class="line"><a name="l06940"></a><span class="lineno"> 6940</span>  <a class="code" href="classoperations__research_1_1sat_1_1_decision_strategy_proto.html#ac97244061e3840a546f716a0906d963a">DecisionStrategyProto::CHOOSE_FIRST</a>) {</div><div class="line"><a name="l06941"></a><span class="lineno"> 6941</span>  <a class="code" href="classoperations__research_1_1sat_1_1_decision_strategy_proto___affine_transformation.html">DecisionStrategyProto::AffineTransformation</a>* t =</div><div class="line"><a name="l06942"></a><span class="lineno"> 6942</span>  strategy.add_transformations();</div><div class="line"><a name="l06943"></a><span class="lineno"> 6943</span>  t-><a class="code" href="classoperations__research_1_1sat_1_1_decision_strategy_proto___affine_transformation.html#ad9f1f0fbafb188e2f728d172ab88dc8f">set_index</a>(strategy.variables_size());</div><div class="line"><a name="l06944"></a><span class="lineno"> 6944</span>  t-><a class="code" href="classoperations__research_1_1sat_1_1_decision_strategy_proto___affine_transformation.html#a817b500800adbaa67949f6d5d31b1b26">set_offset</a>(r.<a class="code" href="structoperations__research_1_1_affine_relation_1_1_relation.html#ae25fb5067bd6b3b1b319efc61685a98f">offset</a>);</div><div class="line"><a name="l06945"></a><span class="lineno"> 6945</span>  t-><a class="code" href="classoperations__research_1_1sat_1_1_decision_strategy_proto___affine_transformation.html#aa87b9dca0aa886c5a96c51d6473c0f27">set_positive_coeff</a>(std::abs(r.<a class="code" href="structoperations__research_1_1_affine_relation_1_1_relation.html#a537e59662a0751edfbbd2a0079a794b4">coeff</a>));</div><div class="line"><a name="l06946"></a><span class="lineno"> 6946</span>  }</div><div class="line"><a name="l06947"></a><span class="lineno"> 6947</span>  strategy.add_variables(rep);</div><div class="line"><a name="l06948"></a><span class="lineno"> 6948</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l06949"></a><span class="lineno"> 6949</span>  <span class="comment">// TODO(user): this variable was removed entirely by the presolve (no</span></div><div class="line"><a name="l06950"></a><span class="lineno"> 6950</span>  <span class="comment">// equivalent variable present). We simply ignore it entirely which</span></div><div class="line"><a name="l06951"></a><span class="lineno"> 6951</span>  <span class="comment">// might result in a different search...</span></div><div class="line"><a name="l06952"></a><span class="lineno"> 6952</span>  }</div><div class="line"><a name="l06953"></a><span class="lineno"> 6953</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l06954"></a><span class="lineno"> 6954</span>  strategy.add_variables(ref);</div><div class="line"><a name="l06955"></a><span class="lineno"> 6955</span>  }</div><div class="line"><a name="l06956"></a><span class="lineno"> 6956</span>  }</div><div class="line"><a name="l06957"></a><span class="lineno"> 6957</span>  }</div><div class="line"><a name="l06958"></a><span class="lineno"> 6958</span> </div><div class="line"><a name="l06959"></a><span class="lineno"> 6959</span>  <span class="comment">// Sync the domains.</span></div><div class="line"><a name="l06960"></a><span class="lineno"> 6960</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#abef5f55c3278c137faca92b8e433f8ea">variables_size</a>(); ++i) {</div><div class="line"><a name="l06961"></a><span class="lineno"> 6961</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a901c19b12842f8af153e588a689a90b5">FillDomainInProto</a>(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(i),</div><div class="line"><a name="l06962"></a><span class="lineno"> 6962</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ab9746c6070379e1990d2fd2da7586398">mutable_variables</a>(i));</div><div class="line"><a name="l06963"></a><span class="lineno"> 6963</span>  <a class="code" href="base_2logging_8h.html#ab4f56aa24c4c9cddc47a6abd2d747f9a">DCHECK_GT</a>(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a6a4544ca20489d70e302f5d6d374a012">variables</a>(i).<a class="code" href="classoperations__research_1_1sat_1_1_integer_variable_proto.html#a0cf3e2ef19d1e580d07b8c50d95cfa1e">domain_size</a>(), 0);</div><div class="line"><a name="l06964"></a><span class="lineno"> 6964</span>  }</div><div class="line"><a name="l06965"></a><span class="lineno"> 6965</span> </div><div class="line"><a name="l06966"></a><span class="lineno"> 6966</span>  <span class="comment">// Set the variables of the mapping_model.</span></div><div class="line"><a name="l06967"></a><span class="lineno"> 6967</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a4b3b9ef9c5f214dd4427daa2646eceda">mapping_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ab9746c6070379e1990d2fd2da7586398">mutable_variables</a>()-><a class="code" href="classoperations__research_1_1sat_1_1_integer_variable_proto.html#a7b93abdbe6f8d3e1b46c3690d11543f8">CopyFrom</a>(</div><div class="line"><a name="l06968"></a><span class="lineno"> 6968</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a6a4544ca20489d70e302f5d6d374a012">variables</a>());</div><div class="line"><a name="l06969"></a><span class="lineno"> 6969</span> </div><div class="line"><a name="l06970"></a><span class="lineno"> 6970</span>  <span class="comment">// Remove all the unused variables from the presolved model.</span></div><div class="line"><a name="l06971"></a><span class="lineno"> 6971</span>  postsolve_mapping_->clear();</div><div class="line"><a name="l06972"></a><span class="lineno"> 6972</span>  std::vector<int> mapping(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#abef5f55c3278c137faca92b8e433f8ea">variables_size</a>(), -1);</div><div class="line"><a name="l06973"></a><span class="lineno"> 6973</span>  <span class="keywordtype">int</span> num_free_variables = 0;</div><div class="line"><a name="l06974"></a><span class="lineno"> 6974</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#abef5f55c3278c137faca92b8e433f8ea">variables_size</a>(); ++i) {</div><div class="line"><a name="l06975"></a><span class="lineno"> 6975</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab246112417bad87cb948820e304208ab">VariableIsNotUsedAnymore</a>(i) &&</div><div class="line"><a name="l06976"></a><span class="lineno"> 6976</span>  !context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ab7b13b808e3dea6fc1e4006f7134e9f9">keep_all_feasible_solutions</a>) {</div><div class="line"><a name="l06977"></a><span class="lineno"> 6977</span>  <span class="keywordflow">if</span> (!context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#af248c1021eda72d628e2f3537eb98ded">VariableWasRemoved</a>(i)) {</div><div class="line"><a name="l06978"></a><span class="lineno"> 6978</span>  <span class="comment">// Tricky. Variables that where not removed by a presolve rule should be</span></div><div class="line"><a name="l06979"></a><span class="lineno"> 6979</span>  <span class="comment">// fixed first during postsolve, so that more complex postsolve rules</span></div><div class="line"><a name="l06980"></a><span class="lineno"> 6980</span>  <span class="comment">// can use their values. One way to do that is to fix them here.</span></div><div class="line"><a name="l06981"></a><span class="lineno"> 6981</span>  <span class="comment">//</span></div><div class="line"><a name="l06982"></a><span class="lineno"> 6982</span>  <span class="comment">// We prefer to fix them to zero if possible.</span></div><div class="line"><a name="l06983"></a><span class="lineno"> 6983</span>  ++num_free_variables;</div><div class="line"><a name="l06984"></a><span class="lineno"> 6984</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a901c19b12842f8af153e588a689a90b5">FillDomainInProto</a>(<a class="code" href="classoperations__research_1_1_domain.html">Domain</a>(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">DomainOf</a>(i).<a class="code" href="classoperations__research_1_1_domain.html#aa070cf76ca3ef43a3b8db17c77d35669">SmallestValue</a>()),</div><div class="line"><a name="l06985"></a><span class="lineno"> 6985</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a4b3b9ef9c5f214dd4427daa2646eceda">mapping_model</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ab9746c6070379e1990d2fd2da7586398">mutable_variables</a>(i));</div><div class="line"><a name="l06986"></a><span class="lineno"> 6986</span>  }</div><div class="line"><a name="l06987"></a><span class="lineno"> 6987</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l06988"></a><span class="lineno"> 6988</span>  }</div><div class="line"><a name="l06989"></a><span class="lineno"> 6989</span>  mapping[i] = postsolve_mapping_->size();</div><div class="line"><a name="l06990"></a><span class="lineno"> 6990</span>  postsolve_mapping_->push_back(i);</div><div class="line"><a name="l06991"></a><span class="lineno"> 6991</span>  }</div><div class="line"><a name="l06992"></a><span class="lineno"> 6992</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(absl::StrCat(<span class="stringliteral">"presolve: "</span>, num_free_variables,</div><div class="line"><a name="l06993"></a><span class="lineno"> 6993</span>  <span class="stringliteral">" free variables removed."</span>));</div><div class="line"><a name="l06994"></a><span class="lineno"> 6994</span> </div><div class="line"><a name="l06995"></a><span class="lineno"> 6995</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aaabb604ccac4a6136be93bfe64e2290d">params</a>().<a class="code" href="classoperations__research_1_1sat_1_1_sat_parameters.html#ae8b161ca3fc819b0c8ea026c19b167fc">permute_variable_randomly</a>()) {</div><div class="line"><a name="l06996"></a><span class="lineno"> 6996</span>  std::shuffle(postsolve_mapping_->begin(), postsolve_mapping_->end(),</div><div class="line"><a name="l06997"></a><span class="lineno"> 6997</span>  *context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#ad02c7812cfbc2a8c4c05d955c9681259">random</a>());</div><div class="line"><a name="l06998"></a><span class="lineno"> 6998</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < postsolve_mapping_->size(); ++i) {</div><div class="line"><a name="l06999"></a><span class="lineno"> 6999</span>  mapping[(*postsolve_mapping_)[i]] = i;</div><div class="line"><a name="l07000"></a><span class="lineno"> 7000</span>  }</div><div class="line"><a name="l07001"></a><span class="lineno"> 7001</span>  }</div><div class="line"><a name="l07002"></a><span class="lineno"> 7002</span> </div><div class="line"><a name="l07003"></a><span class="lineno"> 7003</span>  <a class="code" href="base_2logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a>(context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a11f5290ed8216eea13b9d7383cb4c55f">ConstraintVariableUsageIsConsistent</a>());</div><div class="line"><a name="l07004"></a><span class="lineno"> 7004</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#ae82ca1b371f76400eefb8e94246c5fe2">ApplyVariableMapping</a>(mapping, *context_);</div><div class="line"><a name="l07005"></a><span class="lineno"> 7005</span> </div><div class="line"><a name="l07006"></a><span class="lineno"> 7006</span>  <span class="comment">// Compact all non-empty constraint at the beginning.</span></div><div class="line"><a name="l07007"></a><span class="lineno"> 7007</span>  <a class="code" href="classoperations__research_1_1sat_1_1_cp_model_presolver.html#a6c402792bbe83aa90b75033080755f9b">RemoveEmptyConstraints</a>();</div><div class="line"><a name="l07008"></a><span class="lineno"> 7008</span> </div><div class="line"><a name="l07009"></a><span class="lineno"> 7009</span>  <span class="comment">// Hack to display the number of deductions stored.</span></div><div class="line"><a name="l07010"></a><span class="lineno"> 7010</span>  <span class="keywordflow">if</span> (context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a6e086436e931cd8b341d85e6889b838d">deductions</a>.<a class="code" href="classoperations__research_1_1sat_1_1_domain_deductions.html#ae121dc32bf6b9cc8277109c81dd61664">NumDeductions</a>() > 0) {</div><div class="line"><a name="l07011"></a><span class="lineno"> 7011</span>  context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">UpdateRuleStats</a>(absl::StrCat(</div><div class="line"><a name="l07012"></a><span class="lineno"> 7012</span>  <span class="stringliteral">"deductions: "</span>, context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a6e086436e931cd8b341d85e6889b838d">deductions</a>.<a class="code" href="classoperations__research_1_1sat_1_1_domain_deductions.html#ae121dc32bf6b9cc8277109c81dd61664">NumDeductions</a>(), <span class="stringliteral">" stored"</span>));</div><div class="line"><a name="l07013"></a><span class="lineno"> 7013</span>  }</div><div class="line"><a name="l07014"></a><span class="lineno"> 7014</span> </div><div class="line"><a name="l07015"></a><span class="lineno"> 7015</span>  <span class="comment">// Stats and checks.</span></div><div class="line"><a name="l07016"></a><span class="lineno"> 7016</span>  <span class="keywordflow">if</span> (logger_-><a class="code" href="classoperations__research_1_1_solver_logger.html#a9492cb97f5ec0ecbce0b5ef1b085738b">LoggingIsEnabled</a>()) context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a40432f5ffa1ea8255071161d96f598d1">LogInfo</a>();</div><div class="line"><a name="l07017"></a><span class="lineno"> 7017</span> </div><div class="line"><a name="l07018"></a><span class="lineno"> 7018</span>  <span class="comment">// One possible error that is difficult to avoid here: because of our</span></div><div class="line"><a name="l07019"></a><span class="lineno"> 7019</span>  <span class="comment">// objective expansion, we might detect a possible overflow...</span></div><div class="line"><a name="l07020"></a><span class="lineno"> 7020</span>  <span class="comment">//</span></div><div class="line"><a name="l07021"></a><span class="lineno"> 7021</span>  <span class="comment">// TODO(user): We could abort the expansion when this happen.</span></div><div class="line"><a name="l07022"></a><span class="lineno"> 7022</span>  {</div><div class="line"><a name="l07023"></a><span class="lineno"> 7023</span>  <span class="keyword">const</span> std::string error = <a class="code" href="namespaceoperations__research_1_1sat.html#aeaa0c02e25de8ad88ffb65ef88e2eb86">ValidateCpModel</a>(*context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">working_model</a>);</div><div class="line"><a name="l07024"></a><span class="lineno"> 7024</span>  <span class="keywordflow">if</span> (!error.empty()) {</div><div class="line"><a name="l07025"></a><span class="lineno"> 7025</span>  <a class="code" href="util_2logging_8h.html#a5f67b653dd99ddbe5e3367e3b4b7b532">SOLVER_LOG</a>(logger_, <span class="stringliteral">"Error while validating postsolved model: "</span>, error);</div><div class="line"><a name="l07026"></a><span class="lineno"> 7026</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l07027"></a><span class="lineno"> 7027</span>  }</div><div class="line"><a name="l07028"></a><span class="lineno"> 7028</span>  }</div><div class="line"><a name="l07029"></a><span class="lineno"> 7029</span>  {</div><div class="line"><a name="l07030"></a><span class="lineno"> 7030</span>  <span class="keyword">const</span> std::string error = <a class="code" href="namespaceoperations__research_1_1sat.html#aeaa0c02e25de8ad88ffb65ef88e2eb86">ValidateCpModel</a>(*context_-><a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html#a4b3b9ef9c5f214dd4427daa2646eceda">mapping_model</a>);</div><div class="line"><a name="l07031"></a><span class="lineno"> 7031</span>  <span class="keywordflow">if</span> (!error.empty()) {</div><div class="line"><a name="l07032"></a><span class="lineno"> 7032</span>  <a class="code" href="util_2logging_8h.html#a5f67b653dd99ddbe5e3367e3b4b7b532">SOLVER_LOG</a>(logger_,</div><div class="line"><a name="l07033"></a><span class="lineno"> 7033</span>  <span class="stringliteral">"Error while validating mapping_model model: "</span>, error);</div><div class="line"><a name="l07034"></a><span class="lineno"> 7034</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l07035"></a><span class="lineno"> 7035</span>  }</div><div class="line"><a name="l07036"></a><span class="lineno"> 7036</span>  }</div><div class="line"><a name="l07037"></a><span class="lineno"> 7037</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l07038"></a><span class="lineno"> 7038</span> }</div><div class="line"><a name="l07039"></a><span class="lineno"> 7039</span> </div><div class="line"><a name="l07040"></a><span class="lineno"><a class="line" href="namespaceoperations__research_1_1sat.html#ae82ca1b371f76400eefb8e94246c5fe2"> 7040</a></span> <span class="keywordtype">void</span> <a class="code" href="namespaceoperations__research_1_1sat.html#ae82ca1b371f76400eefb8e94246c5fe2">ApplyVariableMapping</a>(<span class="keyword">const</span> std::vector<int>& mapping,</div><div class="line"><a name="l07041"></a><span class="lineno"> 7041</span>  <span class="keyword">const</span> <a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html">PresolveContext</a>& <a class="code" href="gurobi__interface_8cc.html#a5f287b83a753915ae862fed64f8640a6">context</a>) {</div><div class="line"><a name="l07042"></a><span class="lineno"> 7042</span>  <a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html">CpModelProto</a>* <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a> = <a class="code" href="gurobi__interface_8cc.html#a5f287b83a753915ae862fed64f8640a6">context</a>.working_model;</div><div class="line"><a name="l07043"></a><span class="lineno"> 7043</span> </div><div class="line"><a name="l07044"></a><span class="lineno"> 7044</span>  <span class="comment">// Remap all the variable/literal references in the constraints and the</span></div><div class="line"><a name="l07045"></a><span class="lineno"> 7045</span>  <span class="comment">// enforcement literals in the variables.</span></div><div class="line"><a name="l07046"></a><span class="lineno"> 7046</span>  <span class="keyword">auto</span> mapping_function = [&mapping](<span class="keywordtype">int</span>* ref) {</div><div class="line"><a name="l07047"></a><span class="lineno"> 7047</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> image = mapping[<a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(*ref)];</div><div class="line"><a name="l07048"></a><span class="lineno"> 7048</span>  <a class="code" href="base_2logging_8h.html#a7cc25402ecd7591b4c39934dd656b1f9">CHECK_GE</a>(image, 0);</div><div class="line"><a name="l07049"></a><span class="lineno"> 7049</span>  *ref = <a class="code" href="namespaceoperations__research_1_1sat.html#a217338425de4389014563f1f24331713">RefIsPositive</a>(*ref) ? image : <a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(image);</div><div class="line"><a name="l07050"></a><span class="lineno"> 7050</span>  };</div><div class="line"><a name="l07051"></a><span class="lineno"> 7051</span>  <span class="keywordflow">for</span> (<a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html">ConstraintProto</a>& ct_ref : *<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a9b3e1bc8b76ea7d2614fd7ec2b066039">mutable_constraints</a>()) {</div><div class="line"><a name="l07052"></a><span class="lineno"> 7052</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#ab5f94367fbf4ab2c03bd6bef412c41f7">ApplyToAllVariableIndices</a>(mapping_function, &ct_ref);</div><div class="line"><a name="l07053"></a><span class="lineno"> 7053</span>  <a class="code" href="namespaceoperations__research_1_1sat.html#a6d4dc38d28f20c0c1bbbe71fff0803e7">ApplyToAllLiteralIndices</a>(mapping_function, &ct_ref);</div><div class="line"><a name="l07054"></a><span class="lineno"> 7054</span>  }</div><div class="line"><a name="l07055"></a><span class="lineno"> 7055</span> </div><div class="line"><a name="l07056"></a><span class="lineno"> 7056</span>  <span class="comment">// Remap the objective variables.</span></div><div class="line"><a name="l07057"></a><span class="lineno"> 7057</span>  <span class="keywordflow">if</span> (<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a777a6e330a22a8889389cb9b9c9f12d6">has_objective</a>()) {</div><div class="line"><a name="l07058"></a><span class="lineno"> 7058</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span>& mutable_ref : *<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ad3badc7aa3d94e81e0126edbfa452fda">mutable_objective</a>()-><a class="code" href="classoperations__research_1_1sat_1_1_cp_objective_proto.html#a4392924fce7f5d9851171c0915a478a6">mutable_vars</a>()) {</div><div class="line"><a name="l07059"></a><span class="lineno"> 7059</span>  mapping_function(&mutable_ref);</div><div class="line"><a name="l07060"></a><span class="lineno"> 7060</span>  }</div><div class="line"><a name="l07061"></a><span class="lineno"> 7061</span>  }</div><div class="line"><a name="l07062"></a><span class="lineno"> 7062</span> </div><div class="line"><a name="l07063"></a><span class="lineno"> 7063</span>  <span class="comment">// Remap the assumptions.</span></div><div class="line"><a name="l07064"></a><span class="lineno"> 7064</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span>& mutable_ref : *<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a455dfc21909343b88cb247fa3234fb28">mutable_assumptions</a>()) {</div><div class="line"><a name="l07065"></a><span class="lineno"> 7065</span>  mapping_function(&mutable_ref);</div><div class="line"><a name="l07066"></a><span class="lineno"> 7066</span>  }</div><div class="line"><a name="l07067"></a><span class="lineno"> 7067</span> </div><div class="line"><a name="l07068"></a><span class="lineno"> 7068</span>  <span class="comment">// Remap the search decision heuristic.</span></div><div class="line"><a name="l07069"></a><span class="lineno"> 7069</span>  <span class="comment">// Note that we delete any heuristic related to a removed variable.</span></div><div class="line"><a name="l07070"></a><span class="lineno"> 7070</span>  <span class="keywordflow">for</span> (<a class="code" href="classoperations__research_1_1sat_1_1_decision_strategy_proto.html">DecisionStrategyProto</a>& strategy : *<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a40a4b138f2c2868e312e489fabb55ea5">mutable_search_strategy</a>()) {</div><div class="line"><a name="l07071"></a><span class="lineno"> 7071</span>  <span class="keyword">const</span> <a class="code" href="classoperations__research_1_1sat_1_1_decision_strategy_proto.html">DecisionStrategyProto</a> copy = strategy;</div><div class="line"><a name="l07072"></a><span class="lineno"> 7072</span>  strategy.<a class="code" href="classoperations__research_1_1sat_1_1_decision_strategy_proto.html#a97c353c23050b2faebd883435f73aa6e">clear_variables</a>();</div><div class="line"><a name="l07073"></a><span class="lineno"> 7073</span>  std::vector<int> new_indices(copy.<a class="code" href="classoperations__research_1_1sat_1_1_decision_strategy_proto.html#a7f79618db7151642a4a18ed2be4ac6e4">variables</a>().size(), -1);</div><div class="line"><a name="l07074"></a><span class="lineno"> 7074</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < copy.<a class="code" href="classoperations__research_1_1sat_1_1_decision_strategy_proto.html#a7f79618db7151642a4a18ed2be4ac6e4">variables</a>().size(); ++i) {</div><div class="line"><a name="l07075"></a><span class="lineno"> 7075</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> ref = copy.<a class="code" href="classoperations__research_1_1sat_1_1_decision_strategy_proto.html#a7f79618db7151642a4a18ed2be4ac6e4">variables</a>(i);</div><div class="line"><a name="l07076"></a><span class="lineno"> 7076</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> image = mapping[<a class="code" href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">PositiveRef</a>(ref)];</div><div class="line"><a name="l07077"></a><span class="lineno"> 7077</span>  <span class="keywordflow">if</span> (image >= 0) {</div><div class="line"><a name="l07078"></a><span class="lineno"> 7078</span>  new_indices[i] = strategy.variables_size();</div><div class="line"><a name="l07079"></a><span class="lineno"> 7079</span>  strategy.add_variables(<a class="code" href="namespaceoperations__research_1_1sat.html#a217338425de4389014563f1f24331713">RefIsPositive</a>(ref) ? image : <a class="code" href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">NegatedRef</a>(image));</div><div class="line"><a name="l07080"></a><span class="lineno"> 7080</span>  }</div><div class="line"><a name="l07081"></a><span class="lineno"> 7081</span>  }</div><div class="line"><a name="l07082"></a><span class="lineno"> 7082</span>  strategy.clear_transformations();</div><div class="line"><a name="l07083"></a><span class="lineno"> 7083</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span>& transform : copy.<a class="code" href="classoperations__research_1_1sat_1_1_decision_strategy_proto.html#adf2d62aa8c78fc5a150cda5390a777dd">transformations</a>()) {</div><div class="line"><a name="l07084"></a><span class="lineno"> 7084</span>  <a class="code" href="base_2logging_8h.html#a4bd2e815ca2f702a4b6aa744b1ff3b82">CHECK_LT</a>(transform.index(), new_indices.size());</div><div class="line"><a name="l07085"></a><span class="lineno"> 7085</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> new_index = new_indices[transform.index()];</div><div class="line"><a name="l07086"></a><span class="lineno"> 7086</span>  <span class="keywordflow">if</span> (new_index == -1) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l07087"></a><span class="lineno"> 7087</span>  <span class="keyword">auto</span>* new_transform = strategy.add_transformations();</div><div class="line"><a name="l07088"></a><span class="lineno"> 7088</span>  *new_transform = transform;</div><div class="line"><a name="l07089"></a><span class="lineno"> 7089</span>  <a class="code" href="base_2logging_8h.html#a4bd2e815ca2f702a4b6aa744b1ff3b82">CHECK_LT</a>(new_index, strategy.variables().size());</div><div class="line"><a name="l07090"></a><span class="lineno"> 7090</span>  new_transform->set_index(new_index);</div><div class="line"><a name="l07091"></a><span class="lineno"> 7091</span>  }</div><div class="line"><a name="l07092"></a><span class="lineno"> 7092</span>  }</div><div class="line"><a name="l07093"></a><span class="lineno"> 7093</span> </div><div class="line"><a name="l07094"></a><span class="lineno"> 7094</span>  <span class="comment">// Remap the solution hint. Note that after remapping, we may have duplicate</span></div><div class="line"><a name="l07095"></a><span class="lineno"> 7095</span>  <span class="comment">// variable, so we only keep the first occurence.</span></div><div class="line"><a name="l07096"></a><span class="lineno"> 7096</span>  <span class="keywordflow">if</span> (<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ab814c1d1d979ab21fba480d4f2184f0c">has_solution_hint</a>()) {</div><div class="line"><a name="l07097"></a><span class="lineno"> 7097</span>  absl::flat_hash_set<int> used_vars;</div><div class="line"><a name="l07098"></a><span class="lineno"> 7098</span>  <span class="keyword">auto</span>* mutable_hint = <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a85679cbc9afd0c101f59b8b8c4c7207e">mutable_solution_hint</a>();</div><div class="line"><a name="l07099"></a><span class="lineno"> 7099</span>  <span class="keywordtype">int</span> new_size = 0;</div><div class="line"><a name="l07100"></a><span class="lineno"> 7100</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < mutable_hint->vars_size(); ++i) {</div><div class="line"><a name="l07101"></a><span class="lineno"> 7101</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> old_ref = mutable_hint-><a class="code" href="classoperations__research_1_1sat_1_1_partial_variable_assignment.html#ac7a72ff7bd5bde08ba00f944c5aa3168">vars</a>(i);</div><div class="line"><a name="l07102"></a><span class="lineno"> 7102</span>  <span class="keyword">const</span> int64_t old_value = mutable_hint->values(i);</div><div class="line"><a name="l07103"></a><span class="lineno"> 7103</span> </div><div class="line"><a name="l07104"></a><span class="lineno"> 7104</span>  <span class="comment">// Note that if (old_value - r.offset) is not divisible by r.coeff, then</span></div><div class="line"><a name="l07105"></a><span class="lineno"> 7105</span>  <span class="comment">// the hint is clearly infeasible, but we still set it to a "close" value.</span></div><div class="line"><a name="l07106"></a><span class="lineno"> 7106</span>  <span class="keyword">const</span> <a class="code" href="structoperations__research_1_1_affine_relation_1_1_relation.html">AffineRelation::Relation</a> r = <a class="code" href="gurobi__interface_8cc.html#a5f287b83a753915ae862fed64f8640a6">context</a>.GetAffineRelation(old_ref);</div><div class="line"><a name="l07107"></a><span class="lineno"> 7107</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = r.<a class="code" href="structoperations__research_1_1_affine_relation_1_1_relation.html#af5eb1e0745f18d589b9c552215bef515">representative</a>;</div><div class="line"><a name="l07108"></a><span class="lineno"> 7108</span>  <span class="keyword">const</span> int64_t <a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a> = (old_value - r.<a class="code" href="structoperations__research_1_1_affine_relation_1_1_relation.html#ae25fb5067bd6b3b1b319efc61685a98f">offset</a>) / r.<a class="code" href="structoperations__research_1_1_affine_relation_1_1_relation.html#a537e59662a0751edfbbd2a0079a794b4">coeff</a>;</div><div class="line"><a name="l07109"></a><span class="lineno"> 7109</span> </div><div class="line"><a name="l07110"></a><span class="lineno"> 7110</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> image = mapping[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>];</div><div class="line"><a name="l07111"></a><span class="lineno"> 7111</span>  <a class="code" href="parser_8yy_8cc.html#a33e91cd0cef6786e9e3a27ac67707207">if</a> (image >= 0) {</div><div class="line"><a name="l07112"></a><span class="lineno"> 7112</span>  <span class="keywordflow">if</span> (!used_vars.insert(image).second) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l07113"></a><span class="lineno"> 7113</span>  mutable_hint->set_vars(new_size, image);</div><div class="line"><a name="l07114"></a><span class="lineno"> 7114</span>  mutable_hint->set_values(new_size, <a class="code" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a>);</div><div class="line"><a name="l07115"></a><span class="lineno"> 7115</span>  ++new_size;</div><div class="line"><a name="l07116"></a><span class="lineno"> 7116</span>  }</div><div class="line"><a name="l07117"></a><span class="lineno"> 7117</span>  }</div><div class="line"><a name="l07118"></a><span class="lineno"> 7118</span>  <span class="keywordflow">if</span> (new_size > 0) {</div><div class="line"><a name="l07119"></a><span class="lineno"> 7119</span>  mutable_hint->mutable_vars()->Truncate(new_size);</div><div class="line"><a name="l07120"></a><span class="lineno"> 7120</span>  mutable_hint->mutable_values()->Truncate(new_size);</div><div class="line"><a name="l07121"></a><span class="lineno"> 7121</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l07122"></a><span class="lineno"> 7122</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#adaf32afeab55a0b5babdf8688dd84616">clear_solution_hint</a>();</div><div class="line"><a name="l07123"></a><span class="lineno"> 7123</span>  }</div><div class="line"><a name="l07124"></a><span class="lineno"> 7124</span>  }</div><div class="line"><a name="l07125"></a><span class="lineno"> 7125</span> </div><div class="line"><a name="l07126"></a><span class="lineno"> 7126</span>  <span class="comment">// Move the variable definitions.</span></div><div class="line"><a name="l07127"></a><span class="lineno"> 7127</span>  std::vector<IntegerVariableProto> new_variables;</div><div class="line"><a name="l07128"></a><span class="lineno"> 7128</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < mapping.size(); ++i) {</div><div class="line"><a name="l07129"></a><span class="lineno"> 7129</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> image = mapping[i];</div><div class="line"><a name="l07130"></a><span class="lineno"> 7130</span>  <span class="keywordflow">if</span> (image < 0) <span class="keywordflow">continue</span>;</div><div class="line"><a name="l07131"></a><span class="lineno"> 7131</span>  <span class="keywordflow">if</span> (image >= new_variables.size()) {</div><div class="line"><a name="l07132"></a><span class="lineno"> 7132</span>  new_variables.resize(image + 1, <a class="code" href="classoperations__research_1_1sat_1_1_integer_variable_proto.html">IntegerVariableProto</a>());</div><div class="line"><a name="l07133"></a><span class="lineno"> 7133</span>  }</div><div class="line"><a name="l07134"></a><span class="lineno"> 7134</span>  new_variables[image].Swap(<a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ab9746c6070379e1990d2fd2da7586398">mutable_variables</a>(i));</div><div class="line"><a name="l07135"></a><span class="lineno"> 7135</span>  }</div><div class="line"><a name="l07136"></a><span class="lineno"> 7136</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a97c353c23050b2faebd883435f73aa6e">clear_variables</a>();</div><div class="line"><a name="l07137"></a><span class="lineno"> 7137</span>  <span class="keywordflow">for</span> (<a class="code" href="classoperations__research_1_1sat_1_1_integer_variable_proto.html">IntegerVariableProto</a>& proto_ref : new_variables) {</div><div class="line"><a name="l07138"></a><span class="lineno"> 7138</span>  <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ad03d1e2f94c4ca4c8004ac5355e6504a">add_variables</a>()-><a class="code" href="classoperations__research_1_1sat_1_1_integer_variable_proto.html#a5426dca77a2d887c036efbd92f509fe0">Swap</a>(&proto_ref);</div><div class="line"><a name="l07139"></a><span class="lineno"> 7139</span>  }</div><div class="line"><a name="l07140"></a><span class="lineno"> 7140</span> </div><div class="line"><a name="l07141"></a><span class="lineno"> 7141</span>  <span class="comment">// Check that all variables are used.</span></div><div class="line"><a name="l07142"></a><span class="lineno"> 7142</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <a class="code" href="classoperations__research_1_1sat_1_1_integer_variable_proto.html">IntegerVariableProto</a>& v : <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>-><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a6a4544ca20489d70e302f5d6d374a012">variables</a>()) {</div><div class="line"><a name="l07143"></a><span class="lineno"> 7143</span>  <a class="code" href="base_2logging_8h.html#a7e03ec13560fa94a8fea569960d7efc6">CHECK_GT</a>(v.domain_size(), 0);</div><div class="line"><a name="l07144"></a><span class="lineno"> 7144</span>  }</div><div class="line"><a name="l07145"></a><span class="lineno"> 7145</span> }</div><div class="line"><a name="l07146"></a><span class="lineno"> 7146</span> </div><div class="line"><a name="l07147"></a><span class="lineno"> 7147</span> <span class="keyword">namespace </span>{</div><div class="line"><a name="l07148"></a><span class="lineno"> 7148</span> ConstraintProto CopyConstraintForDuplicateDetection(<span class="keyword">const</span> ConstraintProto& <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) {</div><div class="line"><a name="l07149"></a><span class="lineno"> 7149</span>  ConstraintProto copy = <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>;</div><div class="line"><a name="l07150"></a><span class="lineno"> 7150</span>  copy.clear_name();</div><div class="line"><a name="l07151"></a><span class="lineno"> 7151</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>.constraint_case() == <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35ac188c019178783e5be55110601309d7d">ConstraintProto::kLinear</a>) {</div><div class="line"><a name="l07152"></a><span class="lineno"> 7152</span>  copy.mutable_linear()->clear_domain();</div><div class="line"><a name="l07153"></a><span class="lineno"> 7153</span>  }</div><div class="line"><a name="l07154"></a><span class="lineno"> 7154</span>  <span class="keywordflow">return</span> copy;</div><div class="line"><a name="l07155"></a><span class="lineno"> 7155</span> }</div><div class="line"><a name="l07156"></a><span class="lineno"> 7156</span> } <span class="comment">// namespace</span></div><div class="line"><a name="l07157"></a><span class="lineno"> 7157</span> </div><div class="line"><a name="l07158"></a><span class="lineno"><a class="line" href="namespaceoperations__research_1_1sat.html#a98b74f23742287a604f9850f26bcc06a"> 7158</a></span> std::vector<std::pair<int, int>> <a class="code" href="namespaceoperations__research_1_1sat.html#a98b74f23742287a604f9850f26bcc06a">FindDuplicateConstraints</a>(</div><div class="line"><a name="l07159"></a><span class="lineno"> 7159</span>  <span class="keyword">const</span> <a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html">CpModelProto</a>& <a class="code" href="cp__model__solver_8cc.html#a6ac76d8a372013f67c4973012948ec84">model_proto</a>) {</div><div class="line"><a name="l07160"></a><span class="lineno"> 7160</span>  std::vector<std::pair<int, int>> result;</div><div class="line"><a name="l07161"></a><span class="lineno"> 7161</span> </div><div class="line"><a name="l07162"></a><span class="lineno"> 7162</span>  <span class="comment">// We use a map hash: serialized_constraint_proto hash -> constraint index.</span></div><div class="line"><a name="l07163"></a><span class="lineno"> 7163</span>  <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html">ConstraintProto</a> copy;</div><div class="line"><a name="l07164"></a><span class="lineno"> 7164</span>  absl::flat_hash_map<int64_t, int> equiv_constraints;</div><div class="line"><a name="l07165"></a><span class="lineno"> 7165</span> </div><div class="line"><a name="l07166"></a><span class="lineno"> 7166</span>  std::string s;</div><div class="line"><a name="l07167"></a><span class="lineno"> 7167</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> num_constraints = <a class="code" href="cp__model__solver_8cc.html#a6ac76d8a372013f67c4973012948ec84">model_proto</a>.<a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#afce66afa8ae7776a449bba7313ea3559">constraints</a>().size();</div><div class="line"><a name="l07168"></a><span class="lineno"> 7168</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> c = 0; c < num_constraints; ++c) {</div><div class="line"><a name="l07169"></a><span class="lineno"> 7169</span>  <span class="keywordflow">if</span> (<a class="code" href="cp__model__solver_8cc.html#a6ac76d8a372013f67c4973012948ec84">model_proto</a>.<a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#afce66afa8ae7776a449bba7313ea3559">constraints</a>(c).<a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#a5f9869899e2c94786f9709684f1ecc56">constraint_case</a>() ==</div><div class="line"><a name="l07170"></a><span class="lineno"> 7170</span>  <a class="code" href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35a7af079189afb65e704861b8cdfb301f4">ConstraintProto::CONSTRAINT_NOT_SET</a>) {</div><div class="line"><a name="l07171"></a><span class="lineno"> 7171</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l07172"></a><span class="lineno"> 7172</span>  }</div><div class="line"><a name="l07173"></a><span class="lineno"> 7173</span> </div><div class="line"><a name="l07174"></a><span class="lineno"> 7174</span>  <span class="comment">// We ignore names when comparing constraints.</span></div><div class="line"><a name="l07175"></a><span class="lineno"> 7175</span>  <span class="comment">//</span></div><div class="line"><a name="l07176"></a><span class="lineno"> 7176</span>  <span class="comment">// TODO(user): This is not particularly efficient.</span></div><div class="line"><a name="l07177"></a><span class="lineno"> 7177</span>  copy = CopyConstraintForDuplicateDetection(<a class="code" href="cp__model__solver_8cc.html#a6ac76d8a372013f67c4973012948ec84">model_proto</a>.<a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#afce66afa8ae7776a449bba7313ea3559">constraints</a>(c));</div><div class="line"><a name="l07178"></a><span class="lineno"> 7178</span>  s = copy.SerializeAsString();</div><div class="line"><a name="l07179"></a><span class="lineno"> 7179</span> </div><div class="line"><a name="l07180"></a><span class="lineno"> 7180</span>  <span class="keyword">const</span> int64_t <a class="code" href="matrix__utils_8cc.html#a95d4078c018ac04247ee3785eab30e7b">hash</a> = absl::Hash<std::string>()(s);</div><div class="line"><a name="l07181"></a><span class="lineno"> 7181</span>  <span class="keyword">const</span> <span class="keyword">auto</span> [it, inserted] = equiv_constraints.insert({<a class="code" href="matrix__utils_8cc.html#a95d4078c018ac04247ee3785eab30e7b">hash</a>, c});</div><div class="line"><a name="l07182"></a><span class="lineno"> 7182</span>  <span class="keywordflow">if</span> (!inserted) {</div><div class="line"><a name="l07183"></a><span class="lineno"> 7183</span>  <span class="comment">// Already present!</span></div><div class="line"><a name="l07184"></a><span class="lineno"> 7184</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> other_c_with_same_hash = it->second;</div><div class="line"><a name="l07185"></a><span class="lineno"> 7185</span>  copy = CopyConstraintForDuplicateDetection(</div><div class="line"><a name="l07186"></a><span class="lineno"> 7186</span>  <a class="code" href="cp__model__solver_8cc.html#a6ac76d8a372013f67c4973012948ec84">model_proto</a>.<a class="code" href="classoperations__research_1_1sat_1_1_cp_model_proto.html#afce66afa8ae7776a449bba7313ea3559">constraints</a>(other_c_with_same_hash));</div><div class="line"><a name="l07187"></a><span class="lineno"> 7187</span>  <span class="keywordflow">if</span> (s == copy.SerializeAsString()) {</div><div class="line"><a name="l07188"></a><span class="lineno"> 7188</span>  result.push_back({c, other_c_with_same_hash});</div><div class="line"><a name="l07189"></a><span class="lineno"> 7189</span>  }</div><div class="line"><a name="l07190"></a><span class="lineno"> 7190</span>  }</div><div class="line"><a name="l07191"></a><span class="lineno"> 7191</span>  }</div><div class="line"><a name="l07192"></a><span class="lineno"> 7192</span> </div><div class="line"><a name="l07193"></a><span class="lineno"> 7193</span>  <span class="keywordflow">return</span> result;</div><div class="line"><a name="l07194"></a><span class="lineno"> 7194</span> }</div><div class="line"><a name="l07195"></a><span class="lineno"> 7195</span> </div><div class="line"><a name="l07196"></a><span class="lineno"> 7196</span> } <span class="comment">// namespace sat</span></div><div class="line"><a name="l07197"></a><span class="lineno"> 7197</span> } <span class="comment">// namespace operations_research</span></div><div class="ttc" id="classoperations__research_1_1_domain_html_aa070cf76ca3ef43a3b8db17c77d35669"><div class="ttname"><a href="classoperations__research_1_1_domain.html#aa070cf76ca3ef43a3b8db17c77d35669">operations_research::Domain::SmallestValue</a></div><div class="ttdeci">int64_t SmallestValue() const</div><div class="ttdoc">Returns the value closest to zero.</div><div class="ttdef"><b>Definition:</b> <a href="sorted__interval__list_8cc_source.html#l00218">sorted_interval_list.cc:218</a></div></div>
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<div class="ttc" id="routing__flow_8cc_html_afca32f65388659a4b0956496169488b4"><div class="ttname"><a href="routing__flow_8cc.html#afca32f65388659a4b0956496169488b4">head</a></div><div class="ttdeci">int64_t head</div><div class="ttdef"><b>Definition:</b> <a href="routing__flow_8cc_source.html#l00150">routing_flow.cc:150</a></div></div>
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<div class="ttc" id="namespaceoperations__research_1_1sat_html_a5921e7fd881f9a30b1ccb2c90ed672c8"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#a5921e7fd881f9a30b1ccb2c90ed672c8">operations_research::sat::PresolveCpModel</a></div><div class="ttdeci">bool PresolveCpModel(PresolveContext *context, std::vector< int > *postsolve_mapping)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model__presolve_8cc_source.html#l06669">cp_model_presolve.cc:6669</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_cp_model_proto_html_a40a4b138f2c2868e312e489fabb55ea5"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a40a4b138f2c2868e312e489fabb55ea5">operations_research::sat::CpModelProto::mutable_search_strategy</a></div><div class="ttdeci">::operations_research::sat::DecisionStrategyProto * mutable_search_strategy(int index)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l12212">cp_model.pb.h:12212</a></div></div>
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<div class="ttc" id="base_2logging_8h_html_a3e1cfef60e774a81f30eaddf26a3a274"><div class="ttname"><a href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a></div><div class="ttdeci">#define CHECK(condition)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00491">base/logging.h:491</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_constraint_proto_html_ad5eff2987f39d596a4d7371961a92d42"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_constraint_proto.html#ad5eff2987f39d596a4d7371961a92d42">operations_research::sat::ConstraintProto::mutable_exactly_one</a></div><div class="ttdeci">::operations_research::sat::BoolArgumentProto * mutable_exactly_one()</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l09588">cp_model.pb.h:9588</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_sat_parameters_html_a9fae23a232c99b6dbdd1bfd9be98dba0"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#a9fae23a232c99b6dbdd1bfd9be98dba0">operations_research::sat::SatParameters::set_presolve_blocked_clause</a></div><div class="ttdeci">void set_presolve_blocked_clause(bool value)</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l05337">sat_parameters.pb.h:5337</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_af597da31a1aed22d4bbd0e9398728a9b"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#af597da31a1aed22d4bbd0e9398728a9b">operations_research::sat::PresolveContext::MinOf</a></div><div class="ttdeci">int64_t MinOf(int ref) const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00112">presolve_context.cc:112</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_constraint_proto_html_ada030f50fcddb646af448ac7c5705e35ac188c019178783e5be55110601309d7d"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35ac188c019178783e5be55110601309d7d">operations_research::sat::ConstraintProto::kLinear</a></div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l03917">cp_model.pb.h:3917</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_linear_constraint_proto_html_a4392924fce7f5d9851171c0915a478a6"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_linear_constraint_proto.html#a4392924fce7f5d9851171c0915a478a6">operations_research::sat::LinearConstraintProto::mutable_vars</a></div><div class="ttdeci">::PROTOBUF_NAMESPACE_ID::RepeatedField< ::PROTOBUF_NAMESPACE_ID::int32 > * mutable_vars()</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l07282">cp_model.pb.h:7282</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a436752c51b5f6010033151b7bd7966da"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a436752c51b5f6010033151b7bd7966da">operations_research::sat::PresolveContext::tmp_literals</a></div><div class="ttdeci">std::vector< int > tmp_literals</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8h_source.html#l00450">presolve_context.h:450</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a62cd771660767621e917b2c256182c4e"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a62cd771660767621e917b2c256182c4e">operations_research::sat::PresolveContext::InitializeNewDomains</a></div><div class="ttdeci">void InitializeNewDomains()</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00942">presolve_context.cc:942</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_all_different_constraint_proto_html_aecb2bc94116e771000e5be7f8e3a7f6c"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_all_different_constraint_proto.html#aecb2bc94116e771000e5be7f8e3a7f6c">operations_research::sat::AllDifferentConstraintProto::add_vars</a></div><div class="ttdeci">void add_vars(::PROTOBUF_NAMESPACE_ID::int32 value)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l07213">cp_model.pb.h:7213</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a54cf7f0077717d59a828b656b60c1615"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a54cf7f0077717d59a828b656b60c1615">operations_research::sat::PresolveContext::VariableIsUniqueAndRemovable</a></div><div class="ttdeci">bool VariableIsUniqueAndRemovable(int ref) const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00283">presolve_context.cc:283</a></div></div>
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<div class="ttc" id="alldiff__cst_8cc_html_ad10edae0a852d72fb76afb1c77735045"><div class="ttname"><a href="alldiff__cst_8cc.html#ad10edae0a852d72fb76afb1c77735045">min</a></div><div class="ttdeci">int64_t min</div><div class="ttdef"><b>Definition:</b> <a href="alldiff__cst_8cc_source.html#l00139">alldiff_cst.cc:139</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_constraint_proto_html_a5f9869899e2c94786f9709684f1ecc56"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_constraint_proto.html#a5f9869899e2c94786f9709684f1ecc56">operations_research::sat::ConstraintProto::constraint_case</a></div><div class="ttdeci">ConstraintCase constraint_case() const</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l11228">cp_model.pb.h:11228</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_constraint_proto_html_ab09d50ac461e6e8704ba908d99856594"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_constraint_proto.html#ab09d50ac461e6e8704ba908d99856594">operations_research::sat::ConstraintProto::mutable_all_diff</a></div><div class="ttdeci">::operations_research::sat::AllDifferentConstraintProto * mutable_all_diff()</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l10328">cp_model.pb.h:10328</a></div></div>
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<div class="ttc" id="classoperations__research_1_1_sparse_bitset_html_a41f798a04019147982b29c576ff9d8b7"><div class="ttname"><a href="classoperations__research_1_1_sparse_bitset.html#a41f798a04019147982b29c576ff9d8b7">operations_research::SparseBitset::Set</a></div><div class="ttdeci">void Set(IntegerType index)</div><div class="ttdef"><b>Definition:</b> <a href="bitset_8h_source.html#l00804">bitset.h:804</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a1cd25a05e3e88efc9ffe50461fb21d63"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a1cd25a05e3e88efc9ffe50461fb21d63">operations_research::sat::PresolveContext::ModelIsUnsat</a></div><div class="ttdeci">bool ModelIsUnsat() const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8h_source.html#l00184">presolve_context.h:184</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_aed2a07aad05b4ad8e05cf5fe7b239a1a"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#aed2a07aad05b4ad8e05cf5fe7b239a1a">operations_research::sat::PresolveContext::ReadObjectiveFromProto</a></div><div class="ttdeci">void ReadObjectiveFromProto()</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l01321">presolve_context.cc:1321</a></div></div>
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<div class="ttc" id="util_2logging_8h_html_a5f67b653dd99ddbe5e3367e3b4b7b532"><div class="ttname"><a href="util_2logging_8h.html#a5f67b653dd99ddbe5e3367e3b4b7b532">SOLVER_LOG</a></div><div class="ttdeci">#define SOLVER_LOG(logger,...)</div><div class="ttdef"><b>Definition:</b> <a href="util_2logging_8h_source.html#l00063">util/logging.h:63</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_constraint_proto_html_acfab2074ffdcaf9686057126c5e29d38"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_constraint_proto.html#acfab2074ffdcaf9686057126c5e29d38">operations_research::sat::ConstraintProto::add_enforcement_literal</a></div><div class="ttdeci">void add_enforcement_literal(::PROTOBUF_NAMESPACE_ID::int32 value)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l09275">cp_model.pb.h:9275</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_ad02c7812cfbc2a8c4c05d955c9681259"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#ad02c7812cfbc2a8c4c05d955c9681259">operations_research::sat::PresolveContext::random</a></div><div class="ttdeci">ModelRandomGenerator * random()</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8h_source.html#l00419">presolve_context.h:419</a></div></div>
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<div class="ttc" id="base_2logging_8h_html_a7cc25402ecd7591b4c39934dd656b1f9"><div class="ttname"><a href="base_2logging_8h.html#a7cc25402ecd7591b4c39934dd656b1f9">CHECK_GE</a></div><div class="ttdeci">#define CHECK_GE(val1, val2)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00702">base/logging.h:702</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_constraint_proto_html_a2563b062d2ed99c7b1f9bf8235b9e8fe"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_constraint_proto.html#a2563b062d2ed99c7b1f9bf8235b9e8fe">operations_research::sat::ConstraintProto::mutable_element</a></div><div class="ttdeci">::operations_research::sat::ElementConstraintProto * mutable_element()</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l10402">cp_model.pb.h:10402</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_constraint_proto_html_a02bdc7cff2f71612490c7f50d1b3bd13"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_constraint_proto.html#a02bdc7cff2f71612490c7f50d1b3bd13">operations_research::sat::ConstraintProto::at_most_one</a></div><div class="ttdeci">const ::operations_research::sat::BoolArgumentProto & at_most_one() const</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l09483">cp_model.pb.h:9483</a></div></div>
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<div class="ttc" id="classoperations__research_1_1_domain_html_a1341b29865c5167a64de30c797672e4c"><div class="ttname"><a href="classoperations__research_1_1_domain.html#a1341b29865c5167a64de30c797672e4c">operations_research::Domain::InverseMultiplicationBy</a></div><div class="ttdeci">Domain InverseMultiplicationBy(const int64_t coeff) const</div><div class="ttdoc">Returns {x ∈ Int64, ∃ e ∈ D, x * coeff = e}.</div><div class="ttdef"><b>Definition:</b> <a href="sorted__interval__list_8cc_source.html#l00457">sorted_interval_list.cc:457</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a5763f8709716596a3aa728bacae05a7b"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a5763f8709716596a3aa728bacae05a7b">operations_research::sat::PresolveContext::RemoveVariableFromAffineRelation</a></div><div class="ttdeci">void RemoveVariableFromAffineRelation(int var)</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00675">presolve_context.cc:675</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a2563663eeef59c23110ae4e2a80d8c9f"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a2563663eeef59c23110ae4e2a80d8c9f">operations_research::sat::PresolveContext::ConstraintVariableGraphIsUpToDate</a></div><div class="ttdeci">bool ConstraintVariableGraphIsUpToDate() const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00510">presolve_context.cc:510</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a11f5290ed8216eea13b9d7383cb4c55f"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a11f5290ed8216eea13b9d7383cb4c55f">operations_research::sat::PresolveContext::ConstraintVariableUsageIsConsistent</a></div><div class="ttdeci">bool ConstraintVariableUsageIsConsistent()</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00529">presolve_context.cc:529</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a02302d3a45d02003dcbf288d045ebd86"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a02302d3a45d02003dcbf288d045ebd86">operations_research::sat::PresolveContext::modified_domains</a></div><div class="ttdeci">SparseBitset< int64_t > modified_domains</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8h_source.html#l00456">presolve_context.h:456</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a0704cc50211ab739309aa9f54aa8c606"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a0704cc50211ab739309aa9f54aa8c606">operations_research::sat::PresolveContext::time_limit</a></div><div class="ttdeci">TimeLimit * time_limit()</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8h_source.html#l00418">presolve_context.h:418</a></div></div>
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<div class="ttc" id="stl__util_8h_html"><div class="ttname"><a href="stl__util_8h.html">stl_util.h</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_cp_model_proto_html_a97c353c23050b2faebd883435f73aa6e"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a97c353c23050b2faebd883435f73aa6e">operations_research::sat::CpModelProto::clear_variables</a></div><div class="ttdeci">void clear_variables()</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l12039">cp_model.pb.h:12039</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_cp_model_proto_html_a455dfc21909343b88cb247fa3234fb28"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a455dfc21909343b88cb247fa3234fb28">operations_research::sat::CpModelProto::mutable_assumptions</a></div><div class="ttdeci">::PROTOBUF_NAMESPACE_ID::RepeatedField< ::PROTOBUF_NAMESPACE_ID::int32 > * mutable_assumptions()</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l12374">cp_model.pb.h:12374</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_aa49a8967edab300018eeaa14a27b7210"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#aa49a8967edab300018eeaa14a27b7210">operations_research::sat::PresolveContext::UpdateRuleStats</a></div><div class="ttdeci">void UpdateRuleStats(const std::string &name, int num_times=1)</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00442">presolve_context.cc:442</a></div></div>
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<div class="ttc" id="namespaceoperations__research_1_1sat_html_a3087cde516cefe9797be88d14a80079b"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#a3087cde516cefe9797be88d14a80079b">operations_research::sat::GetOverlappingIntervalComponents</a></div><div class="ttdeci">void GetOverlappingIntervalComponents(std::vector< IndexedInterval > *intervals, std::vector< std::vector< int >> *components)</div><div class="ttdef"><b>Definition:</b> <a href="diffn__util_8cc_source.html#l00392">diffn_util.cc:392</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_cp_model_presolver_html_a6c402792bbe83aa90b75033080755f9b"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_cp_model_presolver.html#a6c402792bbe83aa90b75033080755f9b">operations_research::sat::CpModelPresolver::RemoveEmptyConstraints</a></div><div class="ttdeci">void RemoveEmptyConstraints()</div><div class="ttdef"><b>Definition:</b> <a href="cp__model__presolve_8cc_source.html#l00067">cp_model_presolve.cc:67</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a8fc1d49d1e1bf7261f15ccc6c23c4b10"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a8fc1d49d1e1bf7261f15ccc6c23c4b10">operations_research::sat::PresolveContext::StoreBooleanEqualityRelation</a></div><div class="ttdeci">void StoreBooleanEqualityRelation(int ref_a, int ref_b)</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00819">presolve_context.cc:819</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_constraint_proto_html_ada030f50fcddb646af448ac7c5705e35aaadb0c3370c597095e0cb7e768f04567"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35aaadb0c3370c597095e0cb7e768f04567">operations_research::sat::ConstraintProto::kBoolOr</a></div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l03905">cp_model.pb.h:3905</a></div></div>
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<div class="ttc" id="namespaceoperations__research_1_1sat_html_a98b74f23742287a604f9850f26bcc06a"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#a98b74f23742287a604f9850f26bcc06a">operations_research::sat::FindDuplicateConstraints</a></div><div class="ttdeci">std::vector< std::pair< int, int > > FindDuplicateConstraints(const CpModelProto &model_proto)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model__presolve_8cc_source.html#l07158">cp_model_presolve.cc:7158</a></div></div>
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<div class="ttc" id="simplification_8h_html"><div class="ttname"><a href="simplification_8h.html">simplification.h</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a2877bce637c80df492977b5b6487d563"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a2877bce637c80df492977b5b6487d563">operations_research::sat::PresolveContext::StoreLiteralImpliesVarNEqValue</a></div><div class="ttdeci">bool StoreLiteralImpliesVarNEqValue(int literal, int var, int64_t value)</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l01232">presolve_context.cc:1232</a></div></div>
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<div class="ttc" id="cp__model__solver_8cc_html_aec8af5c1be4e1b6d4330e1161028de21"><div class="ttname"><a href="cp__model__solver_8cc.html#aec8af5c1be4e1b6d4330e1161028de21">time_limit</a></div><div class="ttdeci">ModelSharedTimeLimit * time_limit</div><div class="ttdef"><b>Definition:</b> <a href="cp__model__solver_8cc_source.html#l02013">cp_model_solver.cc:2013</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_acf72cafd3dab9ac4b5e5b1a3aaa75192"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#acf72cafd3dab9ac4b5e5b1a3aaa75192">operations_research::sat::PresolveContext::VarToConstraints</a></div><div class="ttdeci">const absl::flat_hash_set< int > & VarToConstraints(int var) const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8h_source.html#l00369">presolve_context.h:369</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_ad72f81052c0b904f369ac1cee7217b83"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#ad72f81052c0b904f369ac1cee7217b83">operations_research::sat::PresolveContext::ConstraintIsOptional</a></div><div class="ttdeci">bool ConstraintIsOptional(int ct_ref) const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00432">presolve_context.cc:432</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_ada5d036ab04018d9ee3ed60888843102"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#ada5d036ab04018d9ee3ed60888843102">operations_research::sat::PresolveContext::GetOrCreateConstantVar</a></div><div class="ttdeci">int GetOrCreateConstantVar(int64_t cst)</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00048">presolve_context.cc:48</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a7ea7bb314db4dbe4f3b2cac16a2af20f"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a7ea7bb314db4dbe4f3b2cac16a2af20f">operations_research::sat::PresolveContext::CanonicalizeDomainOfSizeTwo</a></div><div class="ttdeci">void CanonicalizeDomainOfSizeTwo(int var)</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l01041">presolve_context.cc:1041</a></div></div>
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<div class="ttc" id="namespaceoperations__research_1_1sat_html_a81b6165b5a5412969f351d0d343166b9"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#a81b6165b5a5412969f351d0d343166b9">operations_research::sat::ApplyToAllIntervalIndices</a></div><div class="ttdeci">void ApplyToAllIntervalIndices(const std::function< void(int *)> &f, ConstraintProto *ct)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model__utils_8cc_source.html#l00357">cp_model_utils.cc:357</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a308f62525f1941cc6ef7f943bd2c4c18"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a308f62525f1941cc6ef7f943bd2c4c18">operations_research::sat::PresolveContext::StartMin</a></div><div class="ttdeci">int64_t StartMin(int ct_ref) const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00215">presolve_context.cc:215</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_sat_parameters_html_a38fa8a83b252655a3659e619f1fe120e"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#a38fa8a83b252655a3659e619f1fe120e">operations_research::sat::SatParameters::max_presolve_iterations</a></div><div class="ttdeci">::PROTOBUF_NAMESPACE_ID::int32 max_presolve_iterations() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l05413">sat_parameters.pb.h:5413</a></div></div>
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<div class="ttc" id="base_2logging_8h_html_a7e03ec13560fa94a8fea569960d7efc6"><div class="ttname"><a href="base_2logging_8h.html#a7e03ec13560fa94a8fea569960d7efc6">CHECK_GT</a></div><div class="ttdeci">#define CHECK_GT(val1, val2)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00703">base/logging.h:703</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_sat_parameters_html_ae8b161ca3fc819b0c8ea026c19b167fc"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#ae8b161ca3fc819b0c8ea026c19b167fc">operations_research::sat::SatParameters::permute_variable_randomly</a></div><div class="ttdeci">bool permute_variable_randomly() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l04907">sat_parameters.pb.h:4907</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_cumulative_constraint_proto_html_a3b0dc4db1d51bd6be689f9b0e18e5089"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_cumulative_constraint_proto.html#a3b0dc4db1d51bd6be689f9b0e18e5089">operations_research::sat::CumulativeConstraintProto::add_intervals</a></div><div class="ttdeci">void add_intervals(::PROTOBUF_NAMESPACE_ID::int32 value)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l08023">cp_model.pb.h:8023</a></div></div>
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<div class="ttc" id="base_2logging_8h_html_afcaa7cadd41741bb855c2ada1d2ef927"><div class="ttname"><a href="base_2logging_8h.html#afcaa7cadd41741bb855c2ada1d2ef927">VLOG</a></div><div class="ttdeci">#define VLOG(verboselevel)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00979">base/logging.h:979</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a100a8cc947bbdb3fd264d42eeeeaa849"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a100a8cc947bbdb3fd264d42eeeeaa849">operations_research::sat::PresolveContext::ConstraintIsInactive</a></div><div class="ttdeci">bool ConstraintIsInactive(int ct_index) const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00420">presolve_context.cc:420</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_af97bdc26758ff0f27314cafb7c2d7044"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#af97bdc26758ff0f27314cafb7c2d7044">operations_research::sat::PresolveContext::GetAbsRelation</a></div><div class="ttdeci">bool GetAbsRelation(int target_ref, int *ref)</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00860">presolve_context.cc:860</a></div></div>
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<div class="ttc" id="default__search_8cc_html_ac673bc430bdc3fdaa09f7becf98ef267"><div class="ttname"><a href="default__search_8cc.html#ac673bc430bdc3fdaa09f7becf98ef267">name</a></div><div class="ttdeci">const std::string name</div><div class="ttdef"><b>Definition:</b> <a href="default__search_8cc_source.html#l00813">default_search.cc:813</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a31d9b7763fd739fe805438b464096c32"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a31d9b7763fd739fe805438b464096c32">operations_research::sat::PresolveContext::ObjectiveDomain</a></div><div class="ttdeci">const Domain & ObjectiveDomain() const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8h_source.html#l00346">presolve_context.h:346</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a3999a4ff1f53b54b40c8cd396105572a"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a3999a4ff1f53b54b40c8cd396105572a">operations_research::sat::PresolveContext::StoreAffineRelation</a></div><div class="ttdeci">bool StoreAffineRelation(int ref_x, int ref_y, int64_t coeff, int64_t offset)</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00703">presolve_context.cc:703</a></div></div>
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<div class="ttc" id="namespaceoperations__research_1_1math__opt_html_a5de89a1f6e3f80a49a0d76136d8044e2"><div class="ttname"><a href="namespaceoperations__research_1_1math__opt.html#a5de89a1f6e3f80a49a0d76136d8044e2">operations_research::math_opt::swap</a></div><div class="ttdeci">void swap(IdMap< K, V > &a, IdMap< K, V > &b)</div><div class="ttdef"><b>Definition:</b> <a href="id__map_8h_source.html#l00263">id_map.h:263</a></div></div>
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<div class="ttc" id="namespaceoperations__research_1_1sat_html_ab5f94367fbf4ab2c03bd6bef412c41f7"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#ab5f94367fbf4ab2c03bd6bef412c41f7">operations_research::sat::ApplyToAllVariableIndices</a></div><div class="ttdeci">void ApplyToAllVariableIndices(const std::function< void(int *)> &f, ConstraintProto *ct)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model__utils_8cc_source.html#l00245">cp_model_utils.cc:245</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_constraint_proto_html_a5e1ab39de2f5594036bacb1d1e803bbc"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_constraint_proto.html#a5e1ab39de2f5594036bacb1d1e803bbc">operations_research::sat::ConstraintProto::mutable_no_overlap</a></div><div class="ttdeci">::operations_research::sat::NoOverlapConstraintProto * mutable_no_overlap()</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l10994">cp_model.pb.h:10994</a></div></div>
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<div class="ttc" id="namespaceoperations__research_1_1sat_html_a55963ffe87280b37dce97b9a8cbd03ae"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#a55963ffe87280b37dce97b9a8cbd03ae">operations_research::sat::kAffineRelationConstraint</a></div><div class="ttdeci">constexpr int kAffineRelationConstraint</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8h_source.html#l00039">presolve_context.h:39</a></div></div>
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<div class="ttc" id="namespaceoperations__research_1_1sat_html_acdbc8ad33149d45a6e6fcd8b72fd68ed"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#acdbc8ad33149d45a6e6fcd8b72fd68ed">operations_research::sat::PositiveRef</a></div><div class="ttdeci">int PositiveRef(int ref)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model__utils_8h_source.html#l00035">cp_model_utils.h:35</a></div></div>
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<div class="ttc" id="classoperations__research_1_1_domain_html_ade71ed1801ba29c7190c387511f76044"><div class="ttname"><a href="classoperations__research_1_1_domain.html#ade71ed1801ba29c7190c387511f76044">operations_research::Domain::Values</a></div><div class="ttdeci">DomainIteratorBeginEnd Values() const &</div><div class="ttdef"><b>Definition:</b> <a href="sorted__interval__list_8h_source.html#l00213">sorted_interval_list.h:213</a></div></div>
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<div class="ttc" id="base_2logging_8h_html_accad43a85d781d53381cd53a9894b6ae"><div class="ttname"><a href="base_2logging_8h.html#accad43a85d781d53381cd53a9894b6ae">LOG</a></div><div class="ttdeci">#define LOG(severity)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00416">base/logging.h:416</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_ab246112417bad87cb948820e304208ab"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#ab246112417bad87cb948820e304208ab">operations_research::sat::PresolveContext::VariableIsNotUsedAnymore</a></div><div class="ttdeci">bool VariableIsNotUsedAnymore(int ref) const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00300">presolve_context.cc:300</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_linear_constraint_proto_html_a50faf32570e4f9cd348c797231fe35e0"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_linear_constraint_proto.html#a50faf32570e4f9cd348c797231fe35e0">operations_research::sat::LinearConstraintProto::coeffs</a></div><div class="ttdeci">::PROTOBUF_NAMESPACE_ID::int64 coeffs(int index) const</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l07300">cp_model.pb.h:7300</a></div></div>
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<div class="ttc" id="sched__constraints_8cc_html_a826c744af066625acb241b17ae3e2be9"><div class="ttname"><a href="sched__constraints_8cc.html#a826c744af066625acb241b17ae3e2be9">start_min</a></div><div class="ttdeci">Rev< int64_t > start_min</div><div class="ttdef"><b>Definition:</b> <a href="sched__constraints_8cc_source.html#l00243">sched_constraints.cc:243</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_ab7b13b808e3dea6fc1e4006f7134e9f9"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#ab7b13b808e3dea6fc1e4006f7134e9f9">operations_research::sat::PresolveContext::keep_all_feasible_solutions</a></div><div class="ttdeci">bool keep_all_feasible_solutions</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8h_source.html#l00440">presolve_context.h:440</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_sat_parameters_html_a2f15d39b7362c11567a19e4eb2ada7cb"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#a2f15d39b7362c11567a19e4eb2ada7cb">operations_research::sat::SatParameters::cp_model_max_num_presolve_operations</a></div><div class="ttdeci">::PROTOBUF_NAMESPACE_ID::int32 cp_model_max_num_presolve_operations() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l05497">sat_parameters.pb.h:5497</a></div></div>
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<div class="ttc" id="gurobi__interface_8cc_html_a0728f23c9a47655d38e0bf1a2f200bcf"><div class="ttname"><a href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a></div><div class="ttdeci">GRBmodel * model</div><div class="ttdef"><b>Definition:</b> <a href="gurobi__interface_8cc_source.html#l00273">gurobi_interface.cc:273</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a06f0856b91c0399720273b5da85ce280"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a06f0856b91c0399720273b5da85ce280">operations_research::sat::PresolveContext::StoreAbsRelation</a></div><div class="ttdeci">bool StoreAbsRelation(int target_ref, int ref)</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00845">presolve_context.cc:845</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_ad1cddf8749d0ce1686f1f428926cfb1d"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#ad1cddf8749d0ce1686f1f428926cfb1d">operations_research::sat::PresolveContext::LiteralForExpressionMax</a></div><div class="ttdeci">int LiteralForExpressionMax(const LinearExpressionProto &expr) const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00166">presolve_context.cc:166</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_bool_argument_proto_html_a9abd20cd5c98c0a4535d168a1c7bb18e"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_bool_argument_proto.html#a9abd20cd5c98c0a4535d168a1c7bb18e">operations_research::sat::BoolArgumentProto::add_literals</a></div><div class="ttdeci">void add_literals(::PROTOBUF_NAMESPACE_ID::int32 value)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l06839">cp_model.pb.h:6839</a></div></div>
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<div class="ttc" id="namespaceoperations__research_html_aa64bf49d041052c7cb3f40f7496d7534"><div class="ttname"><a href="namespaceoperations__research.html#aa64bf49d041052c7cb3f40f7496d7534">operations_research::CapProd</a></div><div class="ttdeci">int64_t CapProd(int64_t x, int64_t y)</div><div class="ttdef"><b>Definition:</b> <a href="saturated__arithmetic_8h_source.html#l00233">saturated_arithmetic.h:233</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_constraint_proto_html_af38f28b635c417041188c1f4e309903b"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_constraint_proto.html#af38f28b635c417041188c1f4e309903b">operations_research::sat::ConstraintProto::mutable_cumulative</a></div><div class="ttdeci">::operations_research::sat::CumulativeConstraintProto * mutable_cumulative()</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l11142">cp_model.pb.h:11142</a></div></div>
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<div class="ttc" id="namespacegtl_html_a288a1dc92da5d3ad62d4bc4cec9e8b1d"><div class="ttname"><a href="namespacegtl.html#a288a1dc92da5d3ad62d4bc4cec9e8b1d">gtl::STLSortAndRemoveDuplicates</a></div><div class="ttdeci">void STLSortAndRemoveDuplicates(T *v, const LessFunc &less_func)</div><div class="ttdef"><b>Definition:</b> <a href="stl__util_8h_source.html#l00058">stl_util.h:58</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_sat_parameters_html_a257e99b653bc762af5410936511fc5da"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#a257e99b653bc762af5410936511fc5da">operations_research::sat::SatParameters::search_branching</a></div><div class="ttdeci">::operations_research::sat::SatParameters_SearchBranching search_branching() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l06787">sat_parameters.pb.h:6787</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_constraint_proto_html_a17e451dbcd12f2170f8c8e9417ea8119"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_constraint_proto.html#a17e451dbcd12f2170f8c8e9417ea8119">operations_research::sat::ConstraintProto::mutable_no_overlap_2d</a></div><div class="ttdeci">::operations_research::sat::NoOverlap2DConstraintProto * mutable_no_overlap_2d()</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l11068">cp_model.pb.h:11068</a></div></div>
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<div class="ttc" id="base_2logging_8h_html_ab4f56aa24c4c9cddc47a6abd2d747f9a"><div class="ttname"><a href="base_2logging_8h.html#ab4f56aa24c4c9cddc47a6abd2d747f9a">DCHECK_GT</a></div><div class="ttdeci">#define DCHECK_GT(val1, val2)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00891">base/logging.h:891</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a4d724b2f4bd1d1cab7b11dafd3448d8b"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a4d724b2f4bd1d1cab7b11dafd3448d8b">operations_research::sat::PresolveContext::ConstraintToVars</a></div><div class="ttdeci">const std::vector< int > & ConstraintToVars(int c) const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8h_source.html#l00365">presolve_context.h:365</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_adff3b5f900c3d62132781fc25b54fb1a"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#adff3b5f900c3d62132781fc25b54fb1a">operations_research::sat::PresolveContext::ExpressionIsAffineBoolean</a></div><div class="ttdeci">bool ExpressionIsAffineBoolean(const LinearExpressionProto &expr) const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00160">presolve_context.cc:160</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a4b3b9ef9c5f214dd4427daa2646eceda"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a4b3b9ef9c5f214dd4427daa2646eceda">operations_research::sat::PresolveContext::mapping_model</a></div><div class="ttdeci">CpModelProto * mapping_model</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8h_source.html#l00433">presolve_context.h:433</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_cp_model_proto_html_abef5f55c3278c137faca92b8e433f8ea"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_cp_model_proto.html#abef5f55c3278c137faca92b8e433f8ea">operations_research::sat::CpModelProto::variables_size</a></div><div class="ttdeci">int variables_size() const</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l12036">cp_model.pb.h:12036</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_sat_parameters_html_a182ebf1d57d890d4cb639e5dbaaafd0d"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#a182ebf1d57d890d4cb639e5dbaaafd0d">operations_research::sat::SatParameters::cp_model_use_sat_presolve</a></div><div class="ttdeci">bool cp_model_use_sat_presolve() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l05553">sat_parameters.pb.h:5553</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_model_copy_html"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_model_copy.html">operations_research::sat::ModelCopy</a></div><div class="ttdef"><b>Definition:</b> <a href="cp__model__presolve_8h_source.html#l00206">cp_model_presolve.h:206</a></div></div>
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<div class="ttc" id="namespaceoperations__research_1_1sat_html_ad78bf6fcea4b54f750e2457e47b4f46a"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#ad78bf6fcea4b54f750e2457e47b4f46a">operations_research::sat::ExtractEncoding</a></div><div class="ttdeci">void ExtractEncoding(const CpModelProto &model_proto, Model *m)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model__loader_8cc_source.html#l00334">cp_model_loader.cc:334</a></div></div>
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<div class="ttc" id="namespaceoperations__research_1_1sat_html_a1c3fa75911c74ce485e62814484c7ae7"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#a1c3fa75911c74ce485e62814484c7ae7">operations_research::sat::LoadConstraint</a></div><div class="ttdeci">bool LoadConstraint(const ConstraintProto &ct, Model *m)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model__loader_8cc_source.html#l01881">cp_model_loader.cc:1881</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_sat_parameters_html_a2324e123d8d953202a627aef20ccd7ac"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#a2324e123d8d953202a627aef20ccd7ac">operations_research::sat::SatParameters::permute_presolve_constraint_order</a></div><div class="ttdeci">bool permute_presolve_constraint_order() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l04935">sat_parameters.pb.h:4935</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_cp_model_proto_html_ad03d1e2f94c4ca4c8004ac5355e6504a"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ad03d1e2f94c4ca4c8004ac5355e6504a">operations_research::sat::CpModelProto::add_variables</a></div><div class="ttdeci">::operations_research::sat::IntegerVariableProto * add_variables()</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l12061">cp_model.pb.h:12061</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_sat_parameters_html_aa2cafb3609f95997ccebf03f0d5cbf51"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#aa2cafb3609f95997ccebf03f0d5cbf51">operations_research::sat::SatParameters::set_use_implied_bounds</a></div><div class="ttdeci">void set_use_implied_bounds(bool value)</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l08057">sat_parameters.pb.h:8057</a></div></div>
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<div class="ttc" id="routing__flow_8cc_html_a64e7efc5529154ba56903e75f5300990"><div class="ttname"><a href="routing__flow_8cc.html#a64e7efc5529154ba56903e75f5300990">tail</a></div><div class="ttdeci">int64_t tail</div><div class="ttdef"><b>Definition:</b> <a href="routing__flow_8cc_source.html#l00149">routing_flow.cc:149</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_af7e074480c08f4887da40ca045624b6c"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#af7e074480c08f4887da40ca045624b6c">operations_research::sat::PresolveContext::VariableIsOnlyUsedInEncodingAndMaybeInObjective</a></div><div class="ttdeci">bool VariableIsOnlyUsedInEncodingAndMaybeInObjective(int ref) const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00330">presolve_context.cc:330</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_linear_constraint_proto_html_aecb2bc94116e771000e5be7f8e3a7f6c"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_linear_constraint_proto.html#aecb2bc94116e771000e5be7f8e3a7f6c">operations_research::sat::LinearConstraintProto::add_vars</a></div><div class="ttdeci">void add_vars(::PROTOBUF_NAMESPACE_ID::int32 value)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l07264">cp_model.pb.h:7264</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_model_copy_html_a4dc4003514ad43b655e41524c32352f1"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_model_copy.html#a4dc4003514ad43b655e41524c32352f1">operations_research::sat::ModelCopy::ModelCopy</a></div><div class="ttdeci">ModelCopy(PresolveContext *context)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model__presolve_8cc_source.html#l06363">cp_model_presolve.cc:6363</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_decision_strategy_proto___affine_transformation_html_ad9f1f0fbafb188e2f728d172ab88dc8f"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_decision_strategy_proto___affine_transformation.html#ad9f1f0fbafb188e2f728d172ab88dc8f">operations_research::sat::DecisionStrategyProto_AffineTransformation::set_index</a></div><div class="ttdeci">void set_index(::PROTOBUF_NAMESPACE_ID::int32 value)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l11435">cp_model.pb.h:11435</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_bool_argument_proto_html_a7e9ec85488cc2f768942885d54b2df8c"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_bool_argument_proto.html#a7e9ec85488cc2f768942885d54b2df8c">operations_research::sat::BoolArgumentProto::mutable_literals</a></div><div class="ttdeci">::PROTOBUF_NAMESPACE_ID::RepeatedField< ::PROTOBUF_NAMESPACE_ID::int32 > * mutable_literals()</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l06857">cp_model.pb.h:6857</a></div></div>
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<div class="ttc" id="var__domination_8h_html"><div class="ttname"><a href="var__domination_8h.html">var_domination.h</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a5f9c1ea2555cc36fcd716296e54ed17a"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a5f9c1ea2555cc36fcd716296e54ed17a">operations_research::sat::PresolveContext::num_presolve_operations</a></div><div class="ttdeci">int64_t num_presolve_operations</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8h_source.html#l00447">presolve_context.h:447</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_ab75a27c0aeda2de9c3957719b8196c36"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#ab75a27c0aeda2de9c3957719b8196c36">operations_research::sat::PresolveContext::UpdateConstraintVariableUsage</a></div><div class="ttdeci">void UpdateConstraintVariableUsage(int c)</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00476">presolve_context.cc:476</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_decision_strategy_proto_html_ac97244061e3840a546f716a0906d963a"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_decision_strategy_proto.html#ac97244061e3840a546f716a0906d963a">operations_research::sat::DecisionStrategyProto::CHOOSE_FIRST</a></div><div class="ttdeci">static constexpr VariableSelectionStrategy CHOOSE_FIRST</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l05122">cp_model.pb.h:5122</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a928c29f37c6ed9d5bba711f905783417"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a928c29f37c6ed9d5bba711f905783417">operations_research::sat::PresolveContext::working_model</a></div><div class="ttdeci">CpModelProto * working_model</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8h_source.html#l00432">presolve_context.h:432</a></div></div>
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<div class="ttc" id="constraint__solver_2table_8cc_html_a9293e4d29cac928301645070dd307683"><div class="ttname"><a href="constraint__solver_2table_8cc.html#a9293e4d29cac928301645070dd307683">b</a></div><div class="ttdeci">int64_t b</div><div class="ttdef"><b>Definition:</b> <a href="constraint__solver_2table_8cc_source.html#l00047">constraint_solver/table.cc:47</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a483ddc58170919b851be240df84c77af"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a483ddc58170919b851be240df84c77af">operations_research::sat::PresolveContext::ObjectiveDomainIsConstraining</a></div><div class="ttdeci">bool ObjectiveDomainIsConstraining() const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8h_source.html#l00350">presolve_context.h:350</a></div></div>
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<div class="ttc" id="integral__types_8h_html"><div class="ttname"><a href="integral__types_8h.html">integral_types.h</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_af4847724208dd09ba3fea8b53132d197"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#af4847724208dd09ba3fea8b53132d197">operations_research::sat::PresolveContext::ExploitFixedDomain</a></div><div class="ttdeci">void ExploitFixedDomain(int var)</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00622">presolve_context.cc:622</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_af188bac2776d4545aab9405f5c801cd8"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#af188bac2776d4545aab9405f5c801cd8">operations_research::sat::PresolveContext::CanBeUsedAsLiteral</a></div><div class="ttdeci">bool CanBeUsedAsLiteral(int ref) const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00089">presolve_context.cc:89</a></div></div>
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<div class="ttc" id="classoperations__research_1_1_domain_html_a5919f86aede74172b7fea05ebdb58975"><div class="ttname"><a href="classoperations__research_1_1_domain.html#a5919f86aede74172b7fea05ebdb58975">operations_research::Domain::UnionWith</a></div><div class="ttdeci">Domain UnionWith(const Domain &domain) const</div><div class="ttdoc">Returns the union of D and domain.</div><div class="ttdef"><b>Definition:</b> <a href="sorted__interval__list_8cc_source.html#l00336">sorted_interval_list.cc:336</a></div></div>
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<div class="ttc" id="base_2logging_8h_html_a4bd2e815ca2f702a4b6aa744b1ff3b82"><div class="ttname"><a href="base_2logging_8h.html#a4bd2e815ca2f702a4b6aa744b1ff3b82">CHECK_LT</a></div><div class="ttdeci">#define CHECK_LT(val1, val2)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00701">base/logging.h:701</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a90674fa816d7a066e251337852214e84"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a90674fa816d7a066e251337852214e84">operations_research::sat::PresolveContext::IntervalUsage</a></div><div class="ttdeci">int IntervalUsage(int c) const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8h_source.html#l00373">presolve_context.h:373</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_cp_model_proto_html_aa0d2b6ddea7cb960b90423ac48f555bf"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_cp_model_proto.html#aa0d2b6ddea7cb960b90423ac48f555bf">operations_research::sat::CpModelProto::Clear</a></div><div class="ttdeci">PROTOBUF_ATTRIBUTE_REINITIALIZES void Clear() final</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8cc_source.html#l09777">cp_model.pb.cc:9777</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_constraint_proto_html_ada030f50fcddb646af448ac7c5705e35aef651681e2d17f777063fddf191f4a99"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35aef651681e2d17f777063fddf191f4a99">operations_research::sat::ConstraintProto::kBoolAnd</a></div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l03906">cp_model.pb.h:3906</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_cp_model_proto_html_a7023490b4c4f4235f15ae455b0e7bfca"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a7023490b4c4f4235f15ae455b0e7bfca">operations_research::sat::CpModelProto::solution_hint</a></div><div class="ttdeci">const ::operations_research::sat::PartialVariableAssignment & solution_hint() const</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l12260">cp_model.pb.h:12260</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_ad0d1a630c07ba2321cf43d97a425bc30"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#ad0d1a630c07ba2321cf43d97a425bc30">operations_research::sat::PresolveContext::SetLiteralToFalse</a></div><div class="ttdeci">ABSL_MUST_USE_RESULT bool SetLiteralToFalse(int lit)</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00410">presolve_context.cc:410</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_cp_model_proto_html_aec7ffd8f1ec4359ef4f203b49b34391e"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_cp_model_proto.html#aec7ffd8f1ec4359ef4f203b49b34391e">operations_research::sat::CpModelProto::has_symmetry</a></div><div class="ttdeci">bool has_symmetry() const</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l12383">cp_model.pb.h:12383</a></div></div>
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<div class="ttc" id="namespaceoperations__research_1_1sat_html_aeaa0c02e25de8ad88ffb65ef88e2eb86"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#aeaa0c02e25de8ad88ffb65ef88e2eb86">operations_research::sat::ValidateCpModel</a></div><div class="ttdeci">std::string ValidateCpModel(const CpModelProto &model)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model__checker_8cc_source.html#l00813">cp_model_checker.cc:813</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_constraint_proto_html_a97b0076b5895845545af3380f3ee4113"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_constraint_proto.html#a97b0076b5895845545af3380f3ee4113">operations_research::sat::ConstraintProto::exactly_one</a></div><div class="ttdeci">const ::operations_research::sat::BoolArgumentProto & exactly_one() const</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l09557">cp_model.pb.h:9557</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a5e86fd5ce0fc653d355ab7303f373e00"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a5e86fd5ce0fc653d355ab7303f373e00">operations_research::sat::PresolveContext::DomainOf</a></div><div class="ttdeci">Domain DomainOf(int ref) const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00339">presolve_context.cc:339</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_integer_variable_proto_html_a7b93abdbe6f8d3e1b46c3690d11543f8"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_integer_variable_proto.html#a7b93abdbe6f8d3e1b46c3690d11543f8">operations_research::sat::IntegerVariableProto::CopyFrom</a></div><div class="ttdeci">void CopyFrom(const IntegerVariableProto &from)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8cc_source.html#l01311">cp_model.pb.cc:1311</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a40432f5ffa1ea8255071161d96f598d1"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a40432f5ffa1ea8255071161d96f598d1">operations_research::sat::PresolveContext::LogInfo</a></div><div class="ttdeci">void LogInfo()</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l01734">presolve_context.cc:1734</a></div></div>
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<div class="ttc" id="mathutil_8h_html"><div class="ttname"><a href="mathutil_8h.html">mathutil.h</a></div></div>
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<div class="ttc" id="cp__model__symmetries_8h_html"><div class="ttname"><a href="cp__model__symmetries_8h.html">cp_model_symmetries.h</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a67699a1a5830ef51dab6941449b02044"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a67699a1a5830ef51dab6941449b02044">operations_research::sat::PresolveContext::NewIntVar</a></div><div class="ttdeci">int NewIntVar(const Domain &domain)</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00039">presolve_context.cc:39</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_cp_model_proto_html_ab1fa807713e298b5262f1b6085834b69"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ab1fa807713e298b5262f1b6085834b69">operations_research::sat::CpModelProto::symmetry</a></div><div class="ttdeci">const ::operations_research::sat::SymmetryProto & symmetry() const</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l12397">cp_model.pb.h:12397</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_constraint_proto_html_a30bb8cd86cbd9eae09b21783f28f8967"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_constraint_proto.html#a30bb8cd86cbd9eae09b21783f28f8967">operations_research::sat::ConstraintProto::mutable_enforcement_literal</a></div><div class="ttdeci">::PROTOBUF_NAMESPACE_ID::RepeatedField< ::PROTOBUF_NAMESPACE_ID::int32 > * mutable_enforcement_literal()</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l09293">cp_model.pb.h:9293</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_constraint_proto_html_acdc90a25e531e4180c495f4ecf2aca2e"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_constraint_proto.html#acdc90a25e531e4180c495f4ecf2aca2e">operations_research::sat::ConstraintProto::enforcement_literal</a></div><div class="ttdeci">::PROTOBUF_NAMESPACE_ID::int32 enforcement_literal(int index) const</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l09264">cp_model.pb.h:9264</a></div></div>
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<div class="ttc" id="namespaceoperations__research_1_1sat_html_a8f4f9889ab3527ce5381ed32e2fae25a"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#a8f4f9889ab3527ce5381ed32e2fae25a">operations_research::sat::ReindexArcs</a></div><div class="ttdeci">int ReindexArcs(IntContainer *tails, IntContainer *heads)</div><div class="ttdef"><b>Definition:</b> <a href="circuit_8h_source.html#l00168">circuit.h:168</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_constraint_proto_html_ae26e2a099b411b50dd1d4c6605837d0a"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_constraint_proto.html#ae26e2a099b411b50dd1d4c6605837d0a">operations_research::sat::ConstraintProto::mutable_bool_or</a></div><div class="ttdeci">::operations_research::sat::BoolArgumentProto * mutable_bool_or()</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l09366">cp_model.pb.h:9366</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_constraint_proto_html_a6d1f941c5f8b326673ffd58eb9b1f0ab"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_constraint_proto.html#a6d1f941c5f8b326673ffd58eb9b1f0ab">operations_research::sat::ConstraintProto::linear</a></div><div class="ttdeci">const ::operations_research::sat::LinearConstraintProto & linear() const</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l10223">cp_model.pb.h:10223</a></div></div>
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<div class="ttc" id="alldiff__cst_8cc_html_a26e6db9bcc64b584051ecc28171ed11f"><div class="ttname"><a href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">max</a></div><div class="ttdeci">int64_t max</div><div class="ttdef"><b>Definition:</b> <a href="alldiff__cst_8cc_source.html#l00140">alldiff_cst.cc:140</a></div></div>
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<div class="ttc" id="constraint__solver_8cc_html_a395f613555f398dd389670bb4c2a4599"><div class="ttname"><a href="constraint__solver_8cc.html#a395f613555f398dd389670bb4c2a4599">next</a></div><div class="ttdeci">Block * next</div><div class="ttdef"><b>Definition:</b> <a href="constraint__solver_8cc_source.html#l00677">constraint_solver.cc:677</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_linear_constraint_proto_html_acf12f419c63aff52dc9ba6292586e9fc"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_linear_constraint_proto.html#acf12f419c63aff52dc9ba6292586e9fc">operations_research::sat::LinearConstraintProto::mutable_coeffs</a></div><div class="ttdeci">::PROTOBUF_NAMESPACE_ID::RepeatedField< ::PROTOBUF_NAMESPACE_ID::int64 > * mutable_coeffs()</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l07329">cp_model.pb.h:7329</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_aaabb604ccac4a6136be93bfe64e2290d"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#aaabb604ccac4a6136be93bfe64e2290d">operations_research::sat::PresolveContext::params</a></div><div class="ttdeci">const SatParameters & params() const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8h_source.html#l00417">presolve_context.h:417</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_decision_strategy_proto_html_adf2d62aa8c78fc5a150cda5390a777dd"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_decision_strategy_proto.html#adf2d62aa8c78fc5a150cda5390a777dd">operations_research::sat::DecisionStrategyProto::transformations</a></div><div class="ttdeci">const ::operations_research::sat::DecisionStrategyProto_AffineTransformation & transformations(int index) const</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l11593">cp_model.pb.h:11593</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a0000c1621c1de75511d17c9d14aae0e8"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a0000c1621c1de75511d17c9d14aae0e8">operations_research::sat::PresolveContext::VariableIsRemovable</a></div><div class="ttdeci">bool VariableIsRemovable(int ref) const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00273">presolve_context.cc:273</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_sat_parameters_html_a9b190b6619c62f2eeb12a734adea72c9"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#a9b190b6619c62f2eeb12a734adea72c9">operations_research::sat::SatParameters::fill_tightened_domains_in_response</a></div><div class="ttdeci">bool fill_tightened_domains_in_response() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l07292">sat_parameters.pb.h:7292</a></div></div>
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<div class="ttc" id="map__util_8h_html"><div class="ttname"><a href="map__util_8h.html">map_util.h</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_cp_model_proto_html_a6a4544ca20489d70e302f5d6d374a012"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a6a4544ca20489d70e302f5d6d374a012">operations_research::sat::CpModelProto::variables</a></div><div class="ttdeci">const ::operations_research::sat::IntegerVariableProto & variables(int index) const</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l12054">cp_model.pb.h:12054</a></div></div>
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<div class="ttc" id="cp__model__fz__solver_8cc_html_aed003f5eb5197bc586b7ef2c36a63da2"><div class="ttname"><a href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a></div><div class="ttdeci">CpModelProto proto</div><div class="ttdef"><b>Definition:</b> <a href="cp__model__fz__solver_8cc_source.html#l00115">cp_model_fz_solver.cc:115</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_ad6ab55f6b68272caeaf24ff0d69818a4"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#ad6ab55f6b68272caeaf24ff0d69818a4">operations_research::sat::PresolveContext::EndMax</a></div><div class="ttdeci">int64_t EndMax(int ct_ref) const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00236">presolve_context.cc:236</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_constraint_proto_html"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_constraint_proto.html">operations_research::sat::ConstraintProto</a></div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l03865">cp_model.pb.h:3865</a></div></div>
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<div class="ttc" id="classoperations__research_1_1_domain_html_a8cf21a67f7d81a800ff912239bb2db64"><div class="ttname"><a href="classoperations__research_1_1_domain.html#a8cf21a67f7d81a800ff912239bb2db64">operations_research::Domain::Min</a></div><div class="ttdeci">int64_t Min() const</div><div class="ttdoc">Returns the min value of the domain.</div><div class="ttdef"><b>Definition:</b> <a href="sorted__interval__list_8cc_source.html#l00208">sorted_interval_list.cc:208</a></div></div>
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<div class="ttc" id="structoperations__research_1_1_affine_relation_1_1_relation_html_a537e59662a0751edfbbd2a0079a794b4"><div class="ttname"><a href="structoperations__research_1_1_affine_relation_1_1_relation.html#a537e59662a0751edfbbd2a0079a794b4">operations_research::AffineRelation::Relation::coeff</a></div><div class="ttdeci">int64_t coeff</div><div class="ttdef"><b>Definition:</b> <a href="affine__relation_8h_source.html#l00078">affine_relation.h:78</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_cp_model_proto_html_ae4e8815b1f4564c29618b0fb285908fb"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ae4e8815b1f4564c29618b0fb285908fb">operations_research::sat::CpModelProto::assumptions</a></div><div class="ttdeci">::PROTOBUF_NAMESPACE_ID::int32 assumptions(int index) const</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l12345">cp_model.pb.h:12345</a></div></div>
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<div class="ttc" id="log__severity_8h_html_a50e5762f38854b37ee3e2851bc1bb0e7"><div class="ttname"><a href="log__severity_8h.html#a50e5762f38854b37ee3e2851bc1bb0e7">WARNING</a></div><div class="ttdeci">const int WARNING</div><div class="ttdef"><b>Definition:</b> <a href="log__severity_8h_source.html#l00031">log_severity.h:31</a></div></div>
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<div class="ttc" id="sched__constraints_8cc_html_a368fa95d42fa4962a75cedd9df656694"><div class="ttname"><a href="sched__constraints_8cc.html#a368fa95d42fa4962a75cedd9df656694">end_max</a></div><div class="ttdeci">Rev< int64_t > end_max</div><div class="ttdef"><b>Definition:</b> <a href="sched__constraints_8cc_source.html#l00246">sched_constraints.cc:246</a></div></div>
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<div class="ttc" id="classoperations__research_1_1_sparse_bitset_html_ab4bc8236a9bfe59526e353800a0f0470"><div class="ttname"><a href="classoperations__research_1_1_sparse_bitset.html#ab4bc8236a9bfe59526e353800a0f0470">operations_research::SparseBitset::SparseClearAll</a></div><div class="ttdeci">void SparseClearAll()</div><div class="ttdef"><b>Definition:</b> <a href="bitset_8h_source.html#l00771">bitset.h:771</a></div></div>
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<div class="ttc" id="namespaceoperations__research_1_1sat_html_a980f3e04f0fac2f0f8a7ff4c73572922"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#a980f3e04f0fac2f0f8a7ff4c73572922">operations_research::sat::ImportConstraintsWithBasicPresolveIntoContext</a></div><div class="ttdeci">bool ImportConstraintsWithBasicPresolveIntoContext(const CpModelProto &in_model, PresolveContext *context)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model__presolve_8cc_source.html#l06631">cp_model_presolve.cc:6631</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_constraint_proto_html_a962fe3316eafe5815027312585d5c4d6"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_constraint_proto.html#a962fe3316eafe5815027312585d5c4d6">operations_research::sat::ConstraintProto::mutable_bool_and</a></div><div class="ttdeci">::operations_research::sat::BoolArgumentProto * mutable_bool_and()</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l09440">cp_model.pb.h:9440</a></div></div>
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<div class="ttc" id="classoperations__research_1_1_domain_html_a52ade49985f3a075425913618285a30d"><div class="ttname"><a href="classoperations__research_1_1_domain.html#a52ade49985f3a075425913618285a30d">operations_research::Domain::front</a></div><div class="ttdeci">ClosedInterval front() const</div><div class="ttdef"><b>Definition:</b> <a href="sorted__interval__list_8h_source.html#l00420">sorted_interval_list.h:420</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_partial_variable_assignment_html_ac7a72ff7bd5bde08ba00f944c5aa3168"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_partial_variable_assignment.html#ac7a72ff7bd5bde08ba00f944c5aa3168">operations_research::sat::PartialVariableAssignment::vars</a></div><div class="ttdeci">::PROTOBUF_NAMESPACE_ID::int32 vars(int index) const</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l11628">cp_model.pb.h:11628</a></div></div>
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<div class="ttc" id="namespaceoperations__research_1_1sat_html_a8e28f522e1d211cabbdcff4fd3028593"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#a8e28f522e1d211cabbdcff4fd3028593">operations_research::sat::CopyEverythingExceptVariablesAndConstraintsFieldsIntoContext</a></div><div class="ttdeci">void CopyEverythingExceptVariablesAndConstraintsFieldsIntoContext(const CpModelProto &in_model, PresolveContext *context)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model__presolve_8cc_source.html#l06642">cp_model_presolve.cc:6642</a></div></div>
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<div class="ttc" id="base_2logging_8h_html_a46e69120fbd3b36e6960e096d23b66f0"><div class="ttname"><a href="base_2logging_8h.html#a46e69120fbd3b36e6960e096d23b66f0">DCHECK_NE</a></div><div class="ttdeci">#define DCHECK_NE(val1, val2)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00887">base/logging.h:887</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_ae3ad719e8a03c11498d2d0ab18558f95"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#ae3ad719e8a03c11498d2d0ab18558f95">operations_research::sat::PresolveContext::SizeMax</a></div><div class="ttdeci">int64_t SizeMax(int ct_ref) const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00250">presolve_context.cc:250</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_af248c1021eda72d628e2f3537eb98ded"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#af248c1021eda72d628e2f3537eb98ded">operations_research::sat::PresolveContext::VariableWasRemoved</a></div><div class="ttdeci">bool VariableWasRemoved(int ref) const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00312">presolve_context.cc:312</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a00f995618e00d575372ff823a12553a9"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a00f995618e00d575372ff823a12553a9">operations_research::sat::PresolveContext::MaxOf</a></div><div class="ttdeci">int64_t MaxOf(int ref) const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00118">presolve_context.cc:118</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_af35921d036d22c6497777d7a5964a13d"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#af35921d036d22c6497777d7a5964a13d">operations_research::sat::PresolveContext::RegisterVariablesUsedInAssumptions</a></div><div class="ttdeci">void RegisterVariablesUsedInAssumptions()</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8h_source.html#l00388">presolve_context.h:388</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a36794cf424ca2d69bc4774437a61a88e"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a36794cf424ca2d69bc4774437a61a88e">operations_research::sat::PresolveContext::WriteObjectiveToProto</a></div><div class="ttdeci">void WriteObjectiveToProto() const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l01641">presolve_context.cc:1641</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_cp_model_proto_html"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_cp_model_proto.html">operations_research::sat::CpModelProto</a></div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l05975">cp_model.pb.h:5975</a></div></div>
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<div class="ttc" id="classoperations__research_1_1_domain_html_ac2d88de67793063ad5f5e923ffd1c0eb"><div class="ttname"><a href="classoperations__research_1_1_domain.html#ac2d88de67793063ad5f5e923ffd1c0eb">operations_research::Domain::FromValues</a></div><div class="ttdeci">static Domain FromValues(std::vector< int64_t > values)</div><div class="ttdoc">Creates a domain from the union of an unsorted list of integer values.</div><div class="ttdef"><b>Definition:</b> <a href="sorted__interval__list_8cc_source.html#l00138">sorted_interval_list.cc:138</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_cp_model_presolver_html_a7ebb6a65cb3d0da1dcf19929c38640e0"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_cp_model_presolver.html#a7ebb6a65cb3d0da1dcf19929c38640e0">operations_research::sat::CpModelPresolver::CpModelPresolver</a></div><div class="ttdeci">CpModelPresolver(PresolveContext *context, std::vector< int > *postsolve_mapping)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model__presolve_8cc_source.html#l06675">cp_model_presolve.cc:6675</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a5c2f01871b9baa2bc0dc556803c5a1ad"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a5c2f01871b9baa2bc0dc556803c5a1ad">operations_research::sat::PresolveContext::PropagateAffineRelation</a></div><div class="ttdeci">bool PropagateAffineRelation(int ref)</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00644">presolve_context.cc:644</a></div></div>
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<div class="ttc" id="base_2logging_8h_html_ae4db23f10f5d4aad6d735f5a74cd6f8c"><div class="ttname"><a href="base_2logging_8h.html#ae4db23f10f5d4aad6d735f5a74cd6f8c">CHECK_LE</a></div><div class="ttdeci">#define CHECK_LE(val1, val2)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00700">base/logging.h:700</a></div></div>
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<div class="ttc" id="structoperations__research_1_1_affine_relation_1_1_relation_html"><div class="ttname"><a href="structoperations__research_1_1_affine_relation_1_1_relation.html">operations_research::AffineRelation::Relation</a></div><div class="ttdef"><b>Definition:</b> <a href="affine__relation_8h_source.html#l00076">affine_relation.h:76</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_decision_strategy_proto_html_a7f79618db7151642a4a18ed2be4ac6e4"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_decision_strategy_proto.html#a7f79618db7151642a4a18ed2be4ac6e4">operations_research::sat::DecisionStrategyProto::variables</a></div><div class="ttdeci">::PROTOBUF_NAMESPACE_ID::int32 variables(int index) const</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l11497">cp_model.pb.h:11497</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_constraint_proto_html_ad653c55b371ae98444295965c6622ddb"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_constraint_proto.html#ad653c55b371ae98444295965c6622ddb">operations_research::sat::ConstraintProto::mutable_linear</a></div><div class="ttdeci">::operations_research::sat::LinearConstraintProto * mutable_linear()</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l10254">cp_model.pb.h:10254</a></div></div>
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<div class="ttc" id="namespaceoperations__research_1_1sat_html_a62adf82ba94a3431e4e547a563f06d81"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#a62adf82ba94a3431e4e547a563f06d81">operations_research::sat::SubstituteVariable</a></div><div class="ttdeci">void SubstituteVariable(int var, int64_t var_coeff_in_definition, const ConstraintProto &definition, ConstraintProto *ct)</div><div class="ttdef"><b>Definition:</b> <a href="presolve__util_8cc_source.html#l00184">presolve_util.cc:184</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_constraint_proto_html_ada030f50fcddb646af448ac7c5705e35ad60570d9bed938f8b11385a7ba7f3508"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35ad60570d9bed938f8b11385a7ba7f3508">operations_research::sat::ConstraintProto::kExactlyOne</a></div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l03908">cp_model.pb.h:3908</a></div></div>
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<div class="ttc" id="namespaceoperations__research_1_1sat_html_a4d700795b2500705ef3031ec994fe472"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#a4d700795b2500705ef3031ec994fe472">operations_research::sat::ExpandCpModel</a></div><div class="ttdeci">void ExpandCpModel(PresolveContext *context)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model__expand_8cc_source.html#l01542">cp_model_expand.cc:1542</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_cp_model_proto_html_afce66afa8ae7776a449bba7313ea3559"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_cp_model_proto.html#afce66afa8ae7776a449bba7313ea3559">operations_research::sat::CpModelProto::constraints</a></div><div class="ttdeci">const ::operations_research::sat::ConstraintProto & constraints(int index) const</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l12094">cp_model.pb.h:12094</a></div></div>
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<div class="ttc" id="namespaceoperations__research_1_1sat_html_ae0803b8198728cd4f6e58498d9c60091"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#ae0803b8198728cd4f6e58498d9c60091">operations_research::sat::NegatedRef</a></div><div class="ttdeci">int NegatedRef(int ref)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model__utils_8h_source.html#l00034">cp_model_utils.h:34</a></div></div>
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<div class="ttc" id="resource_8cc_html_a29fb0dd9484d890b12b280c41c150e20"><div class="ttname"><a href="resource_8cc.html#a29fb0dd9484d890b12b280c41c150e20">demand</a></div><div class="ttdeci">int64_t demand</div><div class="ttdef"><b>Definition:</b> <a href="resource_8cc_source.html#l00125">resource.cc:125</a></div></div>
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<div class="ttc" id="classoperations__research_1_1_math_util_html_ae94db7b2fa1d8e1b3c1dc6c683191609"><div class="ttname"><a href="classoperations__research_1_1_math_util.html#ae94db7b2fa1d8e1b3c1dc6c683191609">operations_research::MathUtil::GCD64</a></div><div class="ttdeci">static int64_t GCD64(int64_t x, int64_t y)</div><div class="ttdef"><b>Definition:</b> <a href="mathutil_8h_source.html#l00107">mathutil.h:107</a></div></div>
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<div class="ttc" id="classoperations__research_1_1_domain_html_ae4bddf829edf1817ecffe94dcc2c6260"><div class="ttname"><a href="classoperations__research_1_1_domain.html#ae4bddf829edf1817ecffe94dcc2c6260">operations_research::Domain::PositiveModuloBySuperset</a></div><div class="ttdeci">Domain PositiveModuloBySuperset(const Domain &modulo) const</div><div class="ttdoc">Returns a superset of {x ∈ Int64, ∃ e ∈ D, ∃ m ∈ modulo, x = e % m }.</div><div class="ttdef"><b>Definition:</b> <a href="sorted__interval__list_8cc_source.html#l00481">sorted_interval_list.cc:481</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_cp_model_proto_html_ac01de597eeeff5521a8bf54568bf1373"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ac01de597eeeff5521a8bf54568bf1373">operations_research::sat::CpModelProto::add_constraints</a></div><div class="ttdeci">::operations_research::sat::ConstraintProto * add_constraints()</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l12101">cp_model.pb.h:12101</a></div></div>
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<div class="ttc" id="namespacegtl_html_aae28e97bd1fa93cb0032642550da7455"><div class="ttname"><a href="namespacegtl.html#aae28e97bd1fa93cb0032642550da7455">gtl::ContainsKey</a></div><div class="ttdeci">bool ContainsKey(const Collection &collection, const Key &key)</div><div class="ttdef"><b>Definition:</b> <a href="map__util_8h_source.html#l00200">map_util.h:200</a></div></div>
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<div class="ttc" id="matrix__utils_8cc_html_a95d4078c018ac04247ee3785eab30e7b"><div class="ttname"><a href="matrix__utils_8cc.html#a95d4078c018ac04247ee3785eab30e7b">hash</a></div><div class="ttdeci">int64_t hash</div><div class="ttdef"><b>Definition:</b> <a href="matrix__utils_8cc_source.html#l00061">matrix_utils.cc:61</a></div></div>
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<div class="ttc" id="namespacegtl_html_abce27d097bc5680207b294bdad75f59f"><div class="ttname"><a href="namespacegtl.html#abce27d097bc5680207b294bdad75f59f">gtl::FindOrDie</a></div><div class="ttdeci">const Collection::value_type::second_type & FindOrDie(const Collection &collection, const typename Collection::value_type::first_type &key)</div><div class="ttdef"><b>Definition:</b> <a href="map__util_8h_source.html#l00206">map_util.h:206</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_constraint_proto_html_ada030f50fcddb646af448ac7c5705e35a60d782b0aafa6f70b6230ffd970b2c6b"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35a60d782b0aafa6f70b6230ffd970b2c6b">operations_research::sat::ConstraintProto::kAtMostOne</a></div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l03907">cp_model.pb.h:3907</a></div></div>
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<div class="ttc" id="cp__model__utils_8h_html"><div class="ttname"><a href="cp__model__utils_8h.html">cp_model_utils.h</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_cp_model_proto_html_a2787b866382b560920d55ce5cf129920"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a2787b866382b560920d55ce5cf129920">operations_research::sat::CpModelProto::objective</a></div><div class="ttdeci">const ::operations_research::sat::CpObjectiveProto & objective() const</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l12130">cp_model.pb.h:12130</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_integer_variable_proto_html_a2266c77ad6db8de45560357c1436e558"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_integer_variable_proto.html#a2266c77ad6db8de45560357c1436e558">operations_research::sat::IntegerVariableProto::add_domain</a></div><div class="ttdeci">void add_domain(::PROTOBUF_NAMESPACE_ID::int64 value)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l06788">cp_model.pb.h:6788</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_linear_constraint_proto_html_ab59665fa3051a704378a94693636fd3b"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_linear_constraint_proto.html#ab59665fa3051a704378a94693636fd3b">operations_research::sat::LinearConstraintProto::set_coeffs</a></div><div class="ttdeci">void set_coeffs(int index, ::PROTOBUF_NAMESPACE_ID::int64 value)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l07304">cp_model.pb.h:7304</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_cp_model_presolver_html"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_cp_model_presolver.html">operations_research::sat::CpModelPresolver</a></div><div class="ttdef"><b>Definition:</b> <a href="cp__model__presolve_8h_source.html#l00064">cp_model_presolve.h:64</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a6939dc7b9db01cf3deff10405e260461"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a6939dc7b9db01cf3deff10405e260461">operations_research::sat::PresolveContext::MarkVariableAsRemoved</a></div><div class="ttdeci">void MarkVariableAsRemoved(int ref)</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00305">presolve_context.cc:305</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a47714f887512a3d7acebfcb4a348291a"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a47714f887512a3d7acebfcb4a348291a">operations_research::sat::PresolveContext::var_to_ub_only_constraints</a></div><div class="ttdeci">std::vector< absl::flat_hash_set< int > > var_to_ub_only_constraints</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8h_source.html#l00429">presolve_context.h:429</a></div></div>
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<div class="ttc" id="pack_8cc_html_a750b5d744c39a06bfb13e6eb010e35d0"><div class="ttname"><a href="pack_8cc.html#a750b5d744c39a06bfb13e6eb010e35d0">index</a></div><div class="ttdeci">int index</div><div class="ttdef"><b>Definition:</b> <a href="pack_8cc_source.html#l00509">pack.cc:509</a></div></div>
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<div class="ttc" id="namespaceoperations__research_1_1sat_html_a74b637c7690aa3cd4c80157b44c5e5ac"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#a74b637c7690aa3cd4c80157b44c5e5ac">operations_research::sat::ConstructOverlappingSets</a></div><div class="ttdeci">void ConstructOverlappingSets(bool already_sorted, std::vector< IndexedInterval > *intervals, std::vector< std::vector< int >> *result)</div><div class="ttdef"><b>Definition:</b> <a href="diffn__util_8cc_source.html#l00343">diffn_util.cc:343</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a77e37831a01ff737a7b5bd7e12c2ecf7"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a77e37831a01ff737a7b5bd7e12c2ecf7">operations_research::sat::PresolveContext::DomainIsEmpty</a></div><div class="ttdeci">bool DomainIsEmpty(int ref) const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00079">presolve_context.cc:79</a></div></div>
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<div class="ttc" id="port_2proto__utils_8h_html"><div class="ttname"><a href="port_2proto__utils_8h.html">proto_utils.h</a></div></div>
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<div class="ttc" id="classoperations__research_1_1_domain_html_a572bd92c25ebc67c72137fd59e53f6d6"><div class="ttname"><a href="classoperations__research_1_1_domain.html#a572bd92c25ebc67c72137fd59e53f6d6">operations_research::Domain::Size</a></div><div class="ttdeci">int64_t Size() const</div><div class="ttdoc">Returns the number of elements in the domain.</div><div class="ttdef"><b>Definition:</b> <a href="sorted__interval__list_8cc_source.html#l00196">sorted_interval_list.cc:196</a></div></div>
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<div class="ttc" id="classoperations__research_1_1_domain_html_abd2c59687cc53dda333d0f18c457389b"><div class="ttname"><a href="classoperations__research_1_1_domain.html#abd2c59687cc53dda333d0f18c457389b">operations_research::Domain::RelaxIfTooComplex</a></div><div class="ttdeci">Domain RelaxIfTooComplex() const</div><div class="ttdoc">If NumIntervals() is too large, this return a superset of the domain.</div><div class="ttdef"><b>Definition:</b> <a href="sorted__interval__list_8cc_source.html#l00368">sorted_interval_list.cc:368</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_constraint_proto_html_a0c6e505a600b075354ca4c9f9a08c4d0"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_constraint_proto.html#a0c6e505a600b075354ca4c9f9a08c4d0">operations_research::sat::ConstraintProto::mutable_interval</a></div><div class="ttdeci">::operations_research::sat::IntervalConstraintProto * mutable_interval()</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l10920">cp_model.pb.h:10920</a></div></div>
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<div class="ttc" id="circuit_8h_html"><div class="ttname"><a href="circuit_8h.html">circuit.h</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a20097880105b02917a50dd5d97b80e55"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a20097880105b02917a50dd5d97b80e55">operations_research::sat::PresolveContext::IntersectDomainWith</a></div><div class="ttdeci">ABSL_MUST_USE_RESULT bool IntersectDomainWith(int ref, const Domain &domain, bool *domain_modified=nullptr)</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00356">presolve_context.cc:356</a></div></div>
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<div class="ttc" id="classoperations__research_1_1_domain_html_a835826c4c5129b74553042a357a721ff"><div class="ttname"><a href="classoperations__research_1_1_domain.html#a835826c4c5129b74553042a357a721ff">operations_research::Domain::IntersectionWith</a></div><div class="ttdeci">Domain IntersectionWith(const Domain &domain) const</div><div class="ttdoc">Returns the intersection of D and domain.</div><div class="ttdef"><b>Definition:</b> <a href="sorted__interval__list_8cc_source.html#l00297">sorted_interval_list.cc:297</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_cp_model_proto_html_a24dcbf29c0d6cd766009a182a6484e3b"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a24dcbf29c0d6cd766009a182a6484e3b">operations_research::sat::CpModelProto::name</a></div><div class="ttdeci">const std::string & name() const</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l11990">cp_model.pb.h:11990</a></div></div>
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<div class="ttc" id="cp__model__presolve_8h_html"><div class="ttname"><a href="cp__model__presolve_8h.html">cp_model_presolve.h</a></div></div>
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<div class="ttc" id="base_2logging_8h_html_aae2dc65d9ea248d54bf39daa986dd295"><div class="ttname"><a href="base_2logging_8h.html#aae2dc65d9ea248d54bf39daa986dd295">DCHECK_GE</a></div><div class="ttdeci">#define DCHECK_GE(val1, val2)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00890">base/logging.h:890</a></div></div>
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<div class="ttc" id="classoperations__research_1_1_domain_html_a63a708c626b59b4504ddb879496c894e"><div class="ttname"><a href="classoperations__research_1_1_domain.html#a63a708c626b59b4504ddb879496c894e">operations_research::Domain::MultiplicationBy</a></div><div class="ttdeci">Domain MultiplicationBy(int64_t coeff, bool *exact=nullptr) const</div><div class="ttdoc">Returns {x ∈ Int64, ∃ e ∈ D, x = e * coeff}.</div><div class="ttdef"><b>Definition:</b> <a href="sorted__interval__list_8cc_source.html#l00376">sorted_interval_list.cc:376</a></div></div>
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<div class="ttc" id="namespaceoperations__research_1_1sat_html_a1b24f74de50e3483bbefacffcd349eb1"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#a1b24f74de50e3483bbefacffcd349eb1">operations_research::sat::DetectAndExploitSymmetriesInPresolve</a></div><div class="ttdeci">bool DetectAndExploitSymmetriesInPresolve(PresolveContext *context)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model__symmetries_8cc_source.html#l00495">cp_model_symmetries.cc:495</a></div></div>
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<div class="ttc" id="structoperations__research_1_1_affine_relation_1_1_relation_html_ae25fb5067bd6b3b1b319efc61685a98f"><div class="ttname"><a href="structoperations__research_1_1_affine_relation_1_1_relation.html#ae25fb5067bd6b3b1b319efc61685a98f">operations_research::AffineRelation::Relation::offset</a></div><div class="ttdeci">int64_t offset</div><div class="ttdef"><b>Definition:</b> <a href="affine__relation_8h_source.html#l00079">affine_relation.h:79</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_linear_constraint_proto_html_a7122a1b5e0cfa809e71e6a4669babc32"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_linear_constraint_proto.html#a7122a1b5e0cfa809e71e6a4669babc32">operations_research::sat::LinearConstraintProto::set_vars</a></div><div class="ttdeci">void set_vars(int index, ::PROTOBUF_NAMESPACE_ID::int32 value)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l07257">cp_model.pb.h:7257</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_cp_model_proto_html_aeaf0da781ca9b370d96b7fbd3f74266a"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_cp_model_proto.html#aeaf0da781ca9b370d96b7fbd3f74266a">operations_research::sat::CpModelProto::constraints_size</a></div><div class="ttdeci">int constraints_size() const</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l12076">cp_model.pb.h:12076</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_constraint_proto_html_aa0d2b6ddea7cb960b90423ac48f555bf"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_constraint_proto.html#aa0d2b6ddea7cb960b90423ac48f555bf">operations_research::sat::ConstraintProto::Clear</a></div><div class="ttdeci">PROTOBUF_ATTRIBUTE_REINITIALIZES void Clear() final</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8cc_source.html#l06984">cp_model.pb.cc:6984</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_aeb77639debea43978becf1d990581537"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#aeb77639debea43978becf1d990581537">operations_research::sat::PresolveContext::tmp_literal_set</a></div><div class="ttdeci">absl::flat_hash_set< int > tmp_literal_set</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8h_source.html#l00453">presolve_context.h:453</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a34e2cd343e0dfb06af9f67df8c4c3502"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a34e2cd343e0dfb06af9f67df8c4c3502">operations_research::sat::PresolveContext::VariableWithCostIsUniqueAndRemovable</a></div><div class="ttdeci">bool VariableWithCostIsUniqueAndRemovable(int ref) const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00290">presolve_context.cc:290</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a5aa53538ba8adaa0bea1c3c0727425b0"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a5aa53538ba8adaa0bea1c3c0727425b0">operations_research::sat::PresolveContext::NotifyThatModelIsUnsat</a></div><div class="ttdeci">ABSL_MUST_USE_RESULT bool NotifyThatModelIsUnsat(const std::string &message="")</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8h_source.html#l00176">presolve_context.h:176</a></div></div>
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<div class="ttc" id="base_2logging_8h_html_a7c0ce053b28d53aa4eaf3eb7fb71663b"><div class="ttname"><a href="base_2logging_8h.html#a7c0ce053b28d53aa4eaf3eb7fb71663b">CHECK_EQ</a></div><div class="ttdeci">#define CHECK_EQ(val1, val2)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00698">base/logging.h:698</a></div></div>
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<div class="ttc" id="namespaceoperations__research_1_1sat_html_a3e2516c0d3fc4991896c6a9bbead80e7"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#a3e2516c0d3fc4991896c6a9bbead80e7">operations_research::sat::GetOverlappingRectangleComponents</a></div><div class="ttdeci">std::vector< absl::Span< int > > GetOverlappingRectangleComponents(const std::vector< Rectangle > &rectangles, absl::Span< int > active_rectangles)</div><div class="ttdef"><b>Definition:</b> <a href="diffn__util_8cc_source.html#l00026">diffn_util.cc:26</a></div></div>
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<div class="ttc" id="sat__base_8h_html"><div class="ttname"><a href="sat__base_8h.html">sat_base.h</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a4bf47c6b5724e9a3a7df78486f9bdc41"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a4bf47c6b5724e9a3a7df78486f9bdc41">operations_research::sat::PresolveContext::SubstituteVariableInObjective</a></div><div class="ttdeci">bool SubstituteVariableInObjective(int var_in_equality, int64_t coeff_in_equality, const ConstraintProto &equality, std::vector< int > *new_vars_in_objective=nullptr)</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l01509">presolve_context.cc:1509</a></div></div>
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<div class="ttc" id="classoperations__research_1_1_domain_html_a4f9af4a46ee07931e3e5e50f6ddfb8ad"><div class="ttname"><a href="classoperations__research_1_1_domain.html#a4f9af4a46ee07931e3e5e50f6ddfb8ad">operations_research::Domain::AdditionWith</a></div><div class="ttdeci">Domain AdditionWith(const Domain &domain) const</div><div class="ttdoc">Returns {x ∈ Int64, ∃ a ∈ D, ∃ b ∈ domain, x = a + b}.</div><div class="ttdef"><b>Definition:</b> <a href="sorted__interval__list_8cc_source.html#l00347">sorted_interval_list.cc:347</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_cp_model_proto_html_ab814c1d1d979ab21fba480d4f2184f0c"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ab814c1d1d979ab21fba480d4f2184f0c">operations_research::sat::CpModelProto::has_solution_hint</a></div><div class="ttdeci">bool has_solution_hint() const</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l12246">cp_model.pb.h:12246</a></div></div>
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<div class="ttc" id="cp__model__checker_8h_html"><div class="ttname"><a href="cp__model__checker_8h.html">cp_model_checker.h</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_interval_constraint_proto_html_ac38f9dab53f7f5580558642a2247602b"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_interval_constraint_proto.html#ac38f9dab53f7f5580558642a2247602b">operations_research::sat::IntervalConstraintProto::mutable_start_view</a></div><div class="ttdeci">::operations_research::sat::LinearExpressionProto * mutable_start_view()</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l07601">cp_model.pb.h:7601</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_cp_model_proto_html_a777a6e330a22a8889389cb9b9c9f12d6"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a777a6e330a22a8889389cb9b9c9f12d6">operations_research::sat::CpModelProto::has_objective</a></div><div class="ttdeci">bool has_objective() const</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l12116">cp_model.pb.h:12116</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_cp_model_proto_html_a0e86147138c8f8bb3380a6824534f90a"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a0e86147138c8f8bb3380a6824534f90a">operations_research::sat::CpModelProto::add_search_strategy</a></div><div class="ttdeci">::operations_research::sat::DecisionStrategyProto * add_search_strategy()</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l12231">cp_model.pb.h:12231</a></div></div>
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<div class="ttc" id="classoperations__research_1_1_domain_html_a1f922def1b57974333f228818cd04e68"><div class="ttname"><a href="classoperations__research_1_1_domain.html#a1f922def1b57974333f228818cd04e68">operations_research::Domain::IsIncludedIn</a></div><div class="ttdeci">bool IsIncludedIn(const Domain &domain) const</div><div class="ttdoc">Returns true iff D is included in the given domain.</div><div class="ttdef"><b>Definition:</b> <a href="sorted__interval__list_8cc_source.html#l00247">sorted_interval_list.cc:247</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_sat_parameters_html_a40d72bf6df642a2d31d6f579ab08c633"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#a40d72bf6df642a2d31d6f579ab08c633">operations_research::sat::SatParameters::cp_model_probing_level</a></div><div class="ttdeci">::PROTOBUF_NAMESPACE_ID::int32 cp_model_probing_level() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l05525">sat_parameters.pb.h:5525</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_cp_model_proto_html_a9b3e1bc8b76ea7d2614fd7ec2b066039"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a9b3e1bc8b76ea7d2614fd7ec2b066039">operations_research::sat::CpModelProto::mutable_constraints</a></div><div class="ttdeci">::operations_research::sat::ConstraintProto * mutable_constraints(int index)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l12082">cp_model.pb.h:12082</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a13c8d5cf71bf7735663c489f5493d036"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a13c8d5cf71bf7735663c489f5493d036">operations_research::sat::PresolveContext::ModelIsExpanded</a></div><div class="ttdeci">bool ModelIsExpanded() const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8h_source.html#l00397">presolve_context.h:397</a></div></div>
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<div class="ttc" id="sat__parameters_8pb_8h_html"><div class="ttname"><a href="sat__parameters_8pb_8h.html">sat_parameters.pb.h</a></div></div>
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<div class="ttc" id="cp__model__solver_8cc_html_a6ac76d8a372013f67c4973012948ec84"><div class="ttname"><a href="cp__model__solver_8cc.html#a6ac76d8a372013f67c4973012948ec84">model_proto</a></div><div class="ttdeci">CpModelProto const * model_proto</div><div class="ttdef"><b>Definition:</b> <a href="cp__model__solver_8cc_source.html#l02011">cp_model_solver.cc:2011</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_integer_variable_proto_html"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_integer_variable_proto.html">operations_research::sat::IntegerVariableProto</a></div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l00268">cp_model.pb.h:268</a></div></div>
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<div class="ttc" id="base_2logging_8h_html"><div class="ttname"><a href="base_2logging_8h.html">logging.h</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a3269ba23127e4ee02e1ab7eecccb620f"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a3269ba23127e4ee02e1ab7eecccb620f">operations_research::sat::PresolveContext::logger</a></div><div class="ttdeci">SolverLogger * logger() const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8h_source.html#l00416">presolve_context.h:416</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a9dd01897679ba54fca524a3b0b7d5612"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a9dd01897679ba54fca524a3b0b7d5612">operations_research::sat::PresolveContext::DomainContains</a></div><div class="ttdeci">bool DomainContains(int ref, int64_t value) const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00349">presolve_context.cc:349</a></div></div>
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<div class="ttc" id="classoperations__research_1_1_domain_html_acecac80bcaa379f4d37af5a0f0b48d02"><div class="ttname"><a href="classoperations__research_1_1_domain.html#acecac80bcaa379f4d37af5a0f0b48d02">operations_research::Domain::DivisionBy</a></div><div class="ttdeci">Domain DivisionBy(int64_t coeff) const</div><div class="ttdoc">Returns {x ∈ Int64, ∃ e ∈ D, x = e / coeff}.</div><div class="ttdef"><b>Definition:</b> <a href="sorted__interval__list_8cc_source.html#l00444">sorted_interval_list.cc:444</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_decision_strategy_proto___affine_transformation_html_a817b500800adbaa67949f6d5d31b1b26"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_decision_strategy_proto___affine_transformation.html#a817b500800adbaa67949f6d5d31b1b26">operations_research::sat::DecisionStrategyProto_AffineTransformation::set_offset</a></div><div class="ttdeci">void set_offset(::PROTOBUF_NAMESPACE_ID::int64 value)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l11455">cp_model.pb.h:11455</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_model_copy_html_ad74e75903c729a01bd681095bd51ff4e"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_model_copy.html#ad74e75903c729a01bd681095bd51ff4e">operations_research::sat::ModelCopy::ImportAndSimplifyConstraints</a></div><div class="ttdeci">bool ImportAndSimplifyConstraints(const CpModelProto &in_model, const std::vector< int > &ignored_constraints)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model__presolve_8cc_source.html#l06366">cp_model_presolve.cc:6366</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_sat_parameters_html_a180d2b6ac73a2f0e7c2162f1083d34eb"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#a180d2b6ac73a2f0e7c2162f1083d34eb">operations_research::sat::SatParameters::enumerate_all_solutions</a></div><div class="ttdeci">bool enumerate_all_solutions() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l07236">sat_parameters.pb.h:7236</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_no_overlap2_d_constraint_proto_html_abfa73d7f106725ceabf4cda4514414a1"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_no_overlap2_d_constraint_proto.html#abfa73d7f106725ceabf4cda4514414a1">operations_research::sat::NoOverlap2DConstraintProto::add_x_intervals</a></div><div class="ttdeci">void add_x_intervals(::PROTOBUF_NAMESPACE_ID::int32 value)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l07885">cp_model.pb.h:7885</a></div></div>
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<div class="ttc" id="base_2logging_8h_html_ae17f8119c108cf3070bad3449c7e0006"><div class="ttname"><a href="base_2logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a></div><div class="ttdeci">#define DCHECK(condition)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00885">base/logging.h:885</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_constraint_proto_html_a74f7eb449a6e182b73c8b4a1dbf15ce6"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_constraint_proto.html#a74f7eb449a6e182b73c8b4a1dbf15ce6">operations_research::sat::ConstraintProto::set_name</a></div><div class="ttdeci">void set_name(ArgT0 &&arg0, ArgT... args)</div></div>
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<div class="ttc" id="classoperations__research_1_1_domain_html"><div class="ttname"><a href="classoperations__research_1_1_domain.html">operations_research::Domain</a></div><div class="ttdoc">We call domain any subset of Int64 = [kint64min, kint64max].</div><div class="ttdef"><b>Definition:</b> <a href="sorted__interval__list_8h_source.html#l00081">sorted_interval_list.h:81</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a890f923209473cf55ac002d1b14bd9e2"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a890f923209473cf55ac002d1b14bd9e2">operations_research::sat::PresolveContext::LiteralIsTrue</a></div><div class="ttdeci">bool LiteralIsTrue(int lit) const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00094">presolve_context.cc:94</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a1aadaad9b8af16ab5a208c682e2e1717"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a1aadaad9b8af16ab5a208c682e2e1717">operations_research::sat::PresolveContext::AddImplication</a></div><div class="ttdeci">void AddImplication(int a, int b)</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00060">presolve_context.cc:60</a></div></div>
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<div class="ttc" id="namespaceoperations__research_1_1sat_html_a901c19b12842f8af153e588a689a90b5"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#a901c19b12842f8af153e588a689a90b5">operations_research::sat::FillDomainInProto</a></div><div class="ttdeci">void FillDomainInProto(const Domain &domain, ProtoWithDomain *proto)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model__utils_8h_source.html#l00093">cp_model_utils.h:93</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_decision_strategy_proto_html"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_decision_strategy_proto.html">operations_research::sat::DecisionStrategyProto</a></div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l05007">cp_model.pb.h:5007</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_integer_variable_proto_html_a5426dca77a2d887c036efbd92f509fe0"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_integer_variable_proto.html#a5426dca77a2d887c036efbd92f509fe0">operations_research::sat::IntegerVariableProto::Swap</a></div><div class="ttdeci">void Swap(IntegerVariableProto *other)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l00317">cp_model.pb.h:317</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a52bccf051bec19d96584096844070eaa"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a52bccf051bec19d96584096844070eaa">operations_research::sat::PresolveContext::UpdateNewConstraintsVariableUsage</a></div><div class="ttdeci">void UpdateNewConstraintsVariableUsage()</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00514">presolve_context.cc:514</a></div></div>
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<div class="ttc" id="preprocessor_8cc_html_abcdbe46fb8451a69d42c17abdb920021"><div class="ttname"><a href="preprocessor_8cc.html#abcdbe46fb8451a69d42c17abdb920021">representative</a></div><div class="ttdeci">ColIndex representative</div><div class="ttdef"><b>Definition:</b> <a href="preprocessor_8cc_source.html#l00465">preprocessor.cc:465</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_sat_parameters_html_a4c604caae3e19f5371529333a1555bb9"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#a4c604caae3e19f5371529333a1555bb9">operations_research::sat::SatParameters::convert_intervals</a></div><div class="ttdeci">bool convert_intervals() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l08105">sat_parameters.pb.h:8105</a></div></div>
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<div class="ttc" id="classoperations__research_1_1_time_limit_html_a810d5f7aaf80cc09cf5a094e20c1aaca"><div class="ttname"><a href="classoperations__research_1_1_time_limit.html#a810d5f7aaf80cc09cf5a094e20c1aaca">operations_research::TimeLimit::LimitReached</a></div><div class="ttdeci">bool LimitReached()</div><div class="ttdoc">Returns true when the external limit is true, or the deterministic time is over the deterministic lim...</div><div class="ttdef"><b>Definition:</b> <a href="time__limit_8h_source.html#l00533">time_limit.h:533</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_sat_parameters_html_a7c134ee6c0afa8afbeadedc61e98ac15"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#a7c134ee6c0afa8afbeadedc61e98ac15">operations_research::sat::SatParameters::merge_at_most_one_work_limit</a></div><div class="ttdeci">double merge_at_most_one_work_limit() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l05805">sat_parameters.pb.h:5805</a></div></div>
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<div class="ttc" id="classoperations__research_1_1_solver_logger_html_a9492cb97f5ec0ecbce0b5ef1b085738b"><div class="ttname"><a href="classoperations__research_1_1_solver_logger.html#a9492cb97f5ec0ecbce0b5ef1b085738b">operations_research::SolverLogger::LoggingIsEnabled</a></div><div class="ttdeci">bool LoggingIsEnabled() const</div><div class="ttdef"><b>Definition:</b> <a href="util_2logging_8h_source.html#l00042">util/logging.h:42</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_constraint_proto_html_ada030f50fcddb646af448ac7c5705e35a7af079189afb65e704861b8cdfb301f4"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35a7af079189afb65e704861b8cdfb301f4">operations_research::sat::ConstraintProto::CONSTRAINT_NOT_SET</a></div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l03931">cp_model.pb.h:3931</a></div></div>
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<div class="ttc" id="base_2logging_8h_html_ae89df3243bbb8341130c7b3f44145ea0"><div class="ttname"><a href="base_2logging_8h.html#ae89df3243bbb8341130c7b3f44145ea0">DCHECK_EQ</a></div><div class="ttdeci">#define DCHECK_EQ(val1, val2)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00886">base/logging.h:886</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_ae7450e5b3b9b22663ec7e1fe0d82b6b9"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#ae7450e5b3b9b22663ec7e1fe0d82b6b9">operations_research::sat::PresolveContext::DomainSuperSetOf</a></div><div class="ttdeci">Domain DomainSuperSetOf(const LinearExpressionProto &expr) const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00150">presolve_context.cc:150</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html">operations_research::sat::PresolveContext</a></div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8h_source.html#l00071">presolve_context.h:71</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a6e086436e931cd8b341d85e6889b838d"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a6e086436e931cd8b341d85e6889b838d">operations_research::sat::PresolveContext::deductions</a></div><div class="ttdeci">DomainDeductions deductions</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8h_source.html#l00459">presolve_context.h:459</a></div></div>
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<div class="ttc" id="namespaceoperations__research_1_1sat_html_a42a3b266d8c6dfab1c14baa6c04e2333"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#a42a3b266d8c6dfab1c14baa6c04e2333">operations_research::sat::HasEnforcementLiteral</a></div><div class="ttdeci">bool HasEnforcementLiteral(const ConstraintProto &ct)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model__utils_8h_source.html#l00039">cp_model_utils.h:39</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a23aa815e8a7a860998c4d35760fa087e"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a23aa815e8a7a860998c4d35760fa087e">operations_research::sat::PresolveContext::var_to_lb_only_constraints</a></div><div class="ttdeci">std::vector< absl::flat_hash_set< int > > var_to_lb_only_constraints</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8h_source.html#l00430">presolve_context.h:430</a></div></div>
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<div class="ttc" id="classoperations__research_1_1_time_limit_html_af90cfd1fc238433fc303ee28c5914eb9"><div class="ttname"><a href="classoperations__research_1_1_time_limit.html#af90cfd1fc238433fc303ee28c5914eb9">operations_research::TimeLimit::AdvanceDeterministicTime</a></div><div class="ttdeci">void AdvanceDeterministicTime(double deterministic_duration)</div><div class="ttdoc">Advances the deterministic time.</div><div class="ttdef"><b>Definition:</b> <a href="time__limit_8h_source.html#l00226">time_limit.h:226</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_domain_deductions_html_ae69f83e1bf5e9a4e729840d31078cdbd"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_domain_deductions.html#ae69f83e1bf5e9a4e729840d31078cdbd">operations_research::sat::DomainDeductions::AddDeduction</a></div><div class="ttdeci">void AddDeduction(int literal_ref, int var, Domain domain)</div><div class="ttdef"><b>Definition:</b> <a href="presolve__util_8cc_source.html#l00024">presolve_util.cc:24</a></div></div>
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<div class="ttc" id="cp__model_8pb_8h_html"><div class="ttname"><a href="cp__model_8pb_8h.html">cp_model.pb.h</a></div></div>
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<div class="ttc" id="diffn__util_8h_html"><div class="ttname"><a href="diffn__util_8h.html">diffn_util.h</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a33f90dcf20e1ce9197e60eb3bed25974"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a33f90dcf20e1ce9197e60eb3bed25974">operations_research::sat::PresolveContext::DomainOfVarIsIncludedIn</a></div><div class="ttdeci">bool DomainOfVarIsIncludedIn(int var, const Domain &domain)</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8h_source.html#l00129">presolve_context.h:129</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_cp_model_proto_html_a6e5a7240e89f8a6665de1da5554603ec"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a6e5a7240e89f8a6665de1da5554603ec">operations_research::sat::CpModelProto::search_strategy</a></div><div class="ttdeci">const ::operations_research::sat::DecisionStrategyProto & search_strategy(int index) const</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l12224">cp_model.pb.h:12224</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_ac3d1eecbbf2000282606576273ccf06c"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#ac3d1eecbbf2000282606576273ccf06c">operations_research::sat::PresolveContext::tmp_term_domains</a></div><div class="ttdeci">std::vector< Domain > tmp_term_domains</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8h_source.html#l00451">presolve_context.h:451</a></div></div>
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<div class="ttc" id="presolve__util_8h_html"><div class="ttname"><a href="presolve__util_8h.html">presolve_util.h</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_linear_expression_proto_html_a817b500800adbaa67949f6d5d31b1b26"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_linear_expression_proto.html#a817b500800adbaa67949f6d5d31b1b26">operations_research::sat::LinearExpressionProto::set_offset</a></div><div class="ttdeci">void set_offset(::PROTOBUF_NAMESPACE_ID::int64 value)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l07046">cp_model.pb.h:7046</a></div></div>
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<div class="ttc" id="cp__model__loader_8h_html"><div class="ttname"><a href="cp__model__loader_8h.html">cp_model_loader.h</a></div></div>
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<div class="ttc" id="classoperations__research_1_1_sparse_bitset_html_a1e5ae9fb14fd6b25919148ae8bbaf050"><div class="ttname"><a href="classoperations__research_1_1_sparse_bitset.html#a1e5ae9fb14fd6b25919148ae8bbaf050">operations_research::SparseBitset::PositionsSetAtLeastOnce</a></div><div class="ttdeci">const std::vector< IntegerType > & PositionsSetAtLeastOnce() const</div><div class="ttdef"><b>Definition:</b> <a href="bitset_8h_source.html#l00814">bitset.h:814</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_cp_model_proto_html_adaf32afeab55a0b5babdf8688dd84616"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_cp_model_proto.html#adaf32afeab55a0b5babdf8688dd84616">operations_research::sat::CpModelProto::clear_solution_hint</a></div><div class="ttdeci">void clear_solution_hint()</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l12249">cp_model.pb.h:12249</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a6387e91b098c081f059892e1346a29ed"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a6387e91b098c081f059892e1346a29ed">operations_research::sat::PresolveContext::GetVariableRepresentative</a></div><div class="ttdeci">int GetVariableRepresentative(int ref) const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00908">presolve_context.cc:908</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_afdf0f5e877efe4e1d003300f0ce1234f"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#afdf0f5e877efe4e1d003300f0ce1234f">operations_research::sat::PresolveContext::StoreLiteralImpliesVarEqValue</a></div><div class="ttdeci">bool StoreLiteralImpliesVarEqValue(int literal, int var, int64_t value)</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l01224">presolve_context.cc:1224</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_sat_parameters_html_afc7419e2f33992c4a7b8b0decd1dc3e0"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#afc7419e2f33992c4a7b8b0decd1dc3e0">operations_research::sat::SatParameters::FIXED_SEARCH</a></div><div class="ttdeci">static constexpr SearchBranching FIXED_SEARCH</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l00769">sat_parameters.pb.h:769</a></div></div>
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<div class="ttc" id="namespaceoperations__research_html"><div class="ttname"><a href="namespaceoperations__research.html">operations_research</a></div><div class="ttdoc">Collection of objects used to extend the Constraint Solver library.</div><div class="ttdef"><b>Definition:</b> <a href="dense__doubly__linked__list_8h_source.html#l00021">dense_doubly_linked_list.h:21</a></div></div>
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<div class="ttc" id="probing_8h_html"><div class="ttname"><a href="probing_8h.html">probing.h</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_cp_model_presolver_html_ab37522044009144ac6eff3b3d4c1d271"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_cp_model_presolver.html#ab37522044009144ac6eff3b3d4c1d271">operations_research::sat::CpModelPresolver::PresolveOneConstraint</a></div><div class="ttdeci">bool PresolveOneConstraint(int c)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model__presolve_8cc_source.html#l05360">cp_model_presolve.cc:5360</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_abb6eb29f56c3a33b8ae1b74b08b755c2"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#abb6eb29f56c3a33b8ae1b74b08b755c2">operations_research::sat::PresolveContext::IsFixed</a></div><div class="ttdeci">bool IsFixed(int ref) const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00083">presolve_context.cc:83</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_cp_model_proto_html_ad3badc7aa3d94e81e0126edbfa452fda"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ad3badc7aa3d94e81e0126edbfa452fda">operations_research::sat::CpModelProto::mutable_objective</a></div><div class="ttdeci">::operations_research::sat::CpObjectiveProto * mutable_objective()</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l12177">cp_model.pb.h:12177</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_aef0a687ec05a3e5dd7aa78745e9fb382"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#aef0a687ec05a3e5dd7aa78745e9fb382">operations_research::sat::PresolveContext::SizeMin</a></div><div class="ttdeci">int64_t SizeMin(int ct_ref) const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00243">presolve_context.cc:243</a></div></div>
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<div class="ttc" id="resource_8cc_html_aee52de7b225665566aa47246b9d6b8fa"><div class="ttname"><a href="resource_8cc.html#aee52de7b225665566aa47246b9d6b8fa">time</a></div><div class="ttdeci">int64_t time</div><div class="ttdef"><b>Definition:</b> <a href="resource_8cc_source.html#l01691">resource.cc:1691</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_ae42cae46d8792621471dd137bf9bb3cc"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#ae42cae46d8792621471dd137bf9bb3cc">operations_research::sat::PresolveContext::ExploitExactlyOneInObjective</a></div><div class="ttdeci">bool ExploitExactlyOneInObjective(absl::Span< const int > exactly_one)</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l01592">presolve_context.cc:1592</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a9da1edd6532c2c2b0c09544eade57805"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a9da1edd6532c2c2b0c09544eade57805">operations_research::sat::PresolveContext::IntervalIsConstant</a></div><div class="ttdeci">bool IntervalIsConstant(int ct_ref) const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00173">presolve_context.cc:173</a></div></div>
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<div class="ttc" id="namespaceoperations__research_1_1sat_html_a747d1194d3ad5967b690d046ebb0c2eb"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#a747d1194d3ad5967b690d046ebb0c2eb">operations_research::sat::DetectDominanceRelations</a></div><div class="ttdeci">void DetectDominanceRelations(const PresolveContext &context, VarDomination *var_domination, DualBoundStrengthening *dual_bound_strengthening)</div><div class="ttdef"><b>Definition:</b> <a href="var__domination_8cc_source.html#l00758">var_domination.cc:758</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_cp_model_presolver_html_a4357280dffaba15fcb7f932afe0aea3f"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_cp_model_presolver.html#a4357280dffaba15fcb7f932afe0aea3f">operations_research::sat::CpModelPresolver::Presolve</a></div><div class="ttdeci">bool Presolve()</div><div class="ttdef"><b>Definition:</b> <a href="cp__model__presolve_8cc_source.html#l06720">cp_model_presolve.cc:6720</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_cp_model_proto_html_a85679cbc9afd0c101f59b8b8c4c7207e"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_cp_model_proto.html#a85679cbc9afd0c101f59b8b8c4c7207e">operations_research::sat::CpModelProto::mutable_solution_hint</a></div><div class="ttdeci">::operations_research::sat::PartialVariableAssignment * mutable_solution_hint()</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l12307">cp_model.pb.h:12307</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a66fc178adf4c7e56b3a6f1a5e052d3e5"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a66fc178adf4c7e56b3a6f1a5e052d3e5">operations_research::sat::PresolveContext::ObjectiveMap</a></div><div class="ttdeci">const absl::flat_hash_map< int, int64_t > & ObjectiveMap() const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8h_source.html#l00347">presolve_context.h:347</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_aabb328e6969888226a7a69a972e22c56"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#aabb328e6969888226a7a69a972e22c56">operations_research::sat::PresolveContext::RemoveAllVariablesFromAffineRelationConstraint</a></div><div class="ttdeci">void RemoveAllVariablesFromAffineRelationConstraint()</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00666">presolve_context.cc:666</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a7305c507aa07aea8104037f2e2441876"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a7305c507aa07aea8104037f2e2441876">operations_research::sat::PresolveContext::tmp_left_domains</a></div><div class="ttdeci">std::vector< Domain > tmp_left_domains</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8h_source.html#l00452">presolve_context.h:452</a></div></div>
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<div class="ttc" id="namespaceoperations__research_1_1sat_html_ad9fac07c1db385b6e80e268c0a2109d3"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#ad9fac07c1db385b6e80e268c0a2109d3">operations_research::sat::ExploitDominanceRelations</a></div><div class="ttdeci">bool ExploitDominanceRelations(const VarDomination &var_domination, PresolveContext *context)</div><div class="ttdef"><b>Definition:</b> <a href="var__domination_8cc_source.html#l00957">var_domination.cc:957</a></div></div>
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<div class="ttc" id="namespaceoperations__research_1_1sat_html_a217338425de4389014563f1f24331713"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#a217338425de4389014563f1f24331713">operations_research::sat::RefIsPositive</a></div><div class="ttdeci">bool RefIsPositive(int ref)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model__utils_8h_source.html#l00036">cp_model_utils.h:36</a></div></div>
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<div class="ttc" id="namespaceoperations__research_1_1sat_html_aca25bc3ffa54b3f2668c6eeddffd8d1d"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#aca25bc3ffa54b3f2668c6eeddffd8d1d">operations_research::sat::kObjectiveConstraint</a></div><div class="ttdeci">constexpr int kObjectiveConstraint</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8h_source.html#l00038">presolve_context.h:38</a></div></div>
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<div class="ttc" id="namespaceoperations__research_1_1sat_html_a2dbcb7017d468a17bdb30252af5c6c31"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#a2dbcb7017d468a17bdb30252af5c6c31">operations_research::sat::kNoLiteralIndex</a></div><div class="ttdeci">const LiteralIndex kNoLiteralIndex(-1)</div></div>
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<div class="ttc" id="expr__array_8cc_html_a472a99923cbe11ae7b5a5d157d9ad465"><div class="ttname"><a href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a></div><div class="ttdeci">IntVar * var</div><div class="ttdef"><b>Definition:</b> <a href="expr__array_8cc_source.html#l01874">expr_array.cc:1874</a></div></div>
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<div class="ttc" id="namespaceoperations__research_1_1sat_html_ae82ca1b371f76400eefb8e94246c5fe2"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#ae82ca1b371f76400eefb8e94246c5fe2">operations_research::sat::ApplyVariableMapping</a></div><div class="ttdeci">void ApplyVariableMapping(const std::vector< int > &mapping, const PresolveContext &context)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model__presolve_8cc_source.html#l07040">cp_model_presolve.cc:7040</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_constraint_proto_html_ac7caf1a731f00343e5056d464e74a50b"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_constraint_proto.html#ac7caf1a731f00343e5056d464e74a50b">operations_research::sat::ConstraintProto::Swap</a></div><div class="ttdeci">void Swap(ConstraintProto *other)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l03944">cp_model.pb.h:3944</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_constraint_proto_html_ada030f50fcddb646af448ac7c5705e35a1b948ef604eecbb4da42feb6bed2beff"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35a1b948ef604eecbb4da42feb6bed2beff">operations_research::sat::ConstraintProto::kInterval</a></div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l03926">cp_model.pb.h:3926</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_sat_parameters_html_a046bea353442c96ae6aecffca7920bf8"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#a046bea353442c96ae6aecffca7920bf8">operations_research::sat::SatParameters::merge_no_overlap_work_limit</a></div><div class="ttdeci">double merge_no_overlap_work_limit() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l05777">sat_parameters.pb.h:5777</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_decision_strategy_proto_html_a97c353c23050b2faebd883435f73aa6e"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_decision_strategy_proto.html#a97c353c23050b2faebd883435f73aa6e">operations_research::sat::DecisionStrategyProto::clear_variables</a></div><div class="ttdeci">void clear_variables()</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l11491">cp_model.pb.h:11491</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a9f3443b281c705edf1779f746637ad9b"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a9f3443b281c705edf1779f746637ad9b">operations_research::sat::PresolveContext::LiteralIsFalse</a></div><div class="ttdeci">bool LiteralIsFalse(int lit) const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00103">presolve_context.cc:103</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a37ed950834f3f3b427a707631fd745f4"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a37ed950834f3f3b427a707631fd745f4">operations_research::sat::PresolveContext::SetLiteralToTrue</a></div><div class="ttdeci">ABSL_MUST_USE_RESULT bool SetLiteralToTrue(int lit)</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00416">presolve_context.cc:416</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a4f9423ff72ed20e477fff16e8887df96"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a4f9423ff72ed20e477fff16e8887df96">operations_research::sat::PresolveContext::GetOrCreateVarValueEncoding</a></div><div class="ttdeci">int GetOrCreateVarValueEncoding(int ref, int64_t value)</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l01256">presolve_context.cc:1256</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_linear_constraint_proto_html_ac7a72ff7bd5bde08ba00f944c5aa3168"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_linear_constraint_proto.html#ac7a72ff7bd5bde08ba00f944c5aa3168">operations_research::sat::LinearConstraintProto::vars</a></div><div class="ttdeci">::PROTOBUF_NAMESPACE_ID::int32 vars(int index) const</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l07253">cp_model.pb.h:7253</a></div></div>
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<div class="ttc" id="cp__model__mapping_8h_html"><div class="ttname"><a href="cp__model__mapping_8h.html">cp_model_mapping.h</a></div></div>
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<div class="ttc" id="structoperations__research_1_1_affine_relation_1_1_relation_html_af5eb1e0745f18d589b9c552215bef515"><div class="ttname"><a href="structoperations__research_1_1_affine_relation_1_1_relation.html#af5eb1e0745f18d589b9c552215bef515">operations_research::AffineRelation::Relation::representative</a></div><div class="ttdeci">int representative</div><div class="ttdef"><b>Definition:</b> <a href="affine__relation_8h_source.html#l00077">affine_relation.h:77</a></div></div>
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<div class="ttc" id="gurobi__interface_8cc_html_a5f287b83a753915ae862fed64f8640a6"><div class="ttname"><a href="gurobi__interface_8cc.html#a5f287b83a753915ae862fed64f8640a6">context</a></div><div class="ttdeci">GurobiMPCallbackContext * context</div><div class="ttdef"><b>Definition:</b> <a href="gurobi__interface_8cc_source.html#l00513">gurobi_interface.cc:513</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_decision_strategy_proto___affine_transformation_html_aa87b9dca0aa886c5a96c51d6473c0f27"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_decision_strategy_proto___affine_transformation.html#aa87b9dca0aa886c5a96c51d6473c0f27">operations_research::sat::DecisionStrategyProto_AffineTransformation::set_positive_coeff</a></div><div class="ttdeci">void set_positive_coeff(::PROTOBUF_NAMESPACE_ID::int64 value)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l11475">cp_model.pb.h:11475</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_bool_argument_proto_html_ae257a6514082fdcf3a9f33dda44c40b7"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_bool_argument_proto.html#ae257a6514082fdcf3a9f33dda44c40b7">operations_research::sat::BoolArgumentProto::literals</a></div><div class="ttdeci">::PROTOBUF_NAMESPACE_ID::int32 literals(int index) const</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l06828">cp_model.pb.h:6828</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_sat_parameters_html_a07e94edcd38352036aab52d849109414"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#a07e94edcd38352036aab52d849109414">operations_research::sat::SatParameters::symmetry_level</a></div><div class="ttdeci">::PROTOBUF_NAMESPACE_ID::int32 symmetry_level() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l08133">sat_parameters.pb.h:8133</a></div></div>
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<div class="ttc" id="namespaceoperations__research_1_1sat_html_ab1240060466ba48a36a4b36379bce26a"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#ab1240060466ba48a36a4b36379bce26a">operations_research::sat::ReadDomainFromProto</a></div><div class="ttdeci">Domain ReadDomainFromProto(const ProtoWithDomain &proto)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model__utils_8h_source.html#l00104">cp_model_utils.h:104</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_integer_variable_proto_html_a0cf3e2ef19d1e580d07b8c50d95cfa1e"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_integer_variable_proto.html#a0cf3e2ef19d1e580d07b8c50d95cfa1e">operations_research::sat::IntegerVariableProto::domain_size</a></div><div class="ttdeci">int domain_size() const</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l06768">cp_model.pb.h:6768</a></div></div>
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<div class="ttc" id="cp__model__objective_8h_html"><div class="ttname"><a href="cp__model__objective_8h.html">cp_model_objective.h</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_cp_model_proto_html_ab9746c6070379e1990d2fd2da7586398"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_cp_model_proto.html#ab9746c6070379e1990d2fd2da7586398">operations_research::sat::CpModelProto::mutable_variables</a></div><div class="ttdeci">::operations_research::sat::IntegerVariableProto * mutable_variables(int index)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l12042">cp_model.pb.h:12042</a></div></div>
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<div class="ttc" id="namespacegtl_html_a68e6f9ee67c1545cc1da3d0b9a2ba0fd"><div class="ttname"><a href="namespacegtl.html#a68e6f9ee67c1545cc1da3d0b9a2ba0fd">gtl::STLSetDifference</a></div><div class="ttdeci">void STLSetDifference(const In1 &a, const In2 &b, Out *out, Compare compare)</div><div class="ttdef"><b>Definition:</b> <a href="stl__util_8h_source.html#l00595">stl_util.h:595</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_domain_deductions_html_ae121dc32bf6b9cc8277109c81dd61664"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_domain_deductions.html#ae121dc32bf6b9cc8277109c81dd61664">operations_research::sat::DomainDeductions::NumDeductions</a></div><div class="ttdeci">int NumDeductions() const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__util_8h_source.html#l00072">presolve_util.h:72</a></div></div>
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<div class="ttc" id="namespaceoperations__research_1_1sat_html_a6d4dc38d28f20c0c1bbbe71fff0803e7"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#a6d4dc38d28f20c0c1bbbe71fff0803e7">operations_research::sat::ApplyToAllLiteralIndices</a></div><div class="ttdeci">void ApplyToAllLiteralIndices(const std::function< void(int *)> &f, ConstraintProto *ct)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model__utils_8cc_source.html#l00176">cp_model_utils.cc:176</a></div></div>
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<div class="ttc" id="cp__model__expand_8h_html"><div class="ttname"><a href="cp__model__expand_8h.html">cp_model_expand.h</a></div></div>
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<div class="ttc" id="parser_8yy_8cc_html_a33e91cd0cef6786e9e3a27ac67707207"><div class="ttname"><a href="parser_8yy_8cc.html#a33e91cd0cef6786e9e3a27ac67707207">if</a></div><div class="ttdeci">if(!yyg->yy_init)</div><div class="ttdef"><b>Definition:</b> <a href="parser_8yy_8cc_source.html#l00965">parser.yy.cc:965</a></div></div>
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<div class="ttc" id="demon__profiler_8cc_html_ac072af30c4ffbc834bb4c681f6ecb514"><div class="ttname"><a href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a></div><div class="ttdeci">int64_t value</div><div class="ttdef"><b>Definition:</b> <a href="demon__profiler_8cc_source.html#l00044">demon_profiler.cc:44</a></div></div>
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<div class="ttc" id="optimization_8cc_html_af63dcc00f2023fdf498e0829e6fb8a6b"><div class="ttname"><a href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a></div><div class="ttdeci">Literal literal</div><div class="ttdef"><b>Definition:</b> <a href="optimization_8cc_source.html#l00085">optimization.cc:85</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_aaddc5f58e8a40a5a308531949153f814"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#aaddc5f58e8a40a5a308531949153f814">operations_research::sat::PresolveContext::GetAffineRelation</a></div><div class="ttdeci">AffineRelation::Relation GetAffineRelation(int ref) const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00918">presolve_context.cc:918</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_decision_strategy_proto___affine_transformation_html"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_decision_strategy_proto___affine_transformation.html">operations_research::sat::DecisionStrategyProto_AffineTransformation</a></div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l04846">cp_model.pb.h:4846</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_sat_parameters_html_a9af17b6ddda9a6cc8d20fb3a19d9135f"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#a9af17b6ddda9a6cc8d20fb3a19d9135f">operations_research::sat::SatParameters::cp_model_presolve</a></div><div class="ttdeci">bool cp_model_presolve() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l05441">sat_parameters.pb.h:5441</a></div></div>
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<div class="ttc" id="resource_8cc_html_af92a8383a05fdf586a52263d358f5ada"><div class="ttname"><a href="resource_8cc.html#af92a8383a05fdf586a52263d358f5ada">interval</a></div><div class="ttdeci">IntervalVar * interval</div><div class="ttdef"><b>Definition:</b> <a href="resource_8cc_source.html#l00100">resource.cc:100</a></div></div>
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<div class="ttc" id="base_2logging_8h_html_ab25e01a2942b821d66371fc68d53f2eb"><div class="ttname"><a href="base_2logging_8h.html#ab25e01a2942b821d66371fc68d53f2eb">CHECK_NE</a></div><div class="ttdeci">#define CHECK_NE(val1, val2)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00699">base/logging.h:699</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_domain_deductions_html_a257a307f168114c2e4d8787376e0997f"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_domain_deductions.html#a257a307f168114c2e4d8787376e0997f">operations_research::sat::DomainDeductions::ProcessClause</a></div><div class="ttdeci">std::vector< std::pair< int, Domain > > ProcessClause(absl::Span< const int > clause)</div><div class="ttdef"><b>Definition:</b> <a href="presolve__util_8cc_source.html#l00049">presolve_util.cc:49</a></div></div>
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<div class="ttc" id="demon__profiler_8cc_html_a05da18ca9c7b657a4a6ea24e07c9b695"><div class="ttname"><a href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a></div><div class="ttdeci">const Constraint * ct</div><div class="ttdef"><b>Definition:</b> <a href="demon__profiler_8cc_source.html#l00043">demon_profiler.cc:43</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_a37770bda4577c8ad121d77d99a63cb0f"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#a37770bda4577c8ad121d77d99a63cb0f">operations_research::sat::PresolveContext::GetLiteralRepresentative</a></div><div class="ttdeci">int GetLiteralRepresentative(int ref) const</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l00879">presolve_context.cc:879</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_no_overlap_constraint_proto_html_a3b0dc4db1d51bd6be689f9b0e18e5089"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_no_overlap_constraint_proto.html#a3b0dc4db1d51bd6be689f9b0e18e5089">operations_research::sat::NoOverlapConstraintProto::add_intervals</a></div><div class="ttdeci">void add_intervals(::PROTOBUF_NAMESPACE_ID::int32 value)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l07834">cp_model.pb.h:7834</a></div></div>
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<div class="ttc" id="base_2logging_8h_html_ab62f5ed8f2d48e29802be0cbbcd1359a"><div class="ttname"><a href="base_2logging_8h.html#ab62f5ed8f2d48e29802be0cbbcd1359a">DCHECK_LT</a></div><div class="ttdeci">#define DCHECK_LT(val1, val2)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00889">base/logging.h:889</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_sat_parameters_html_ab4544ee81af6dca0dd86bc91c7634dba"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#ab4544ee81af6dca0dd86bc91c7634dba">operations_research::sat::SatParameters::presolve_extract_integer_enforcement</a></div><div class="ttdeci">bool presolve_extract_integer_enforcement() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l05861">sat_parameters.pb.h:5861</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_domain_deductions_html_aaf4b2d33728a210c2b634812bcec0dae"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_domain_deductions.html#aaf4b2d33728a210c2b634812bcec0dae">operations_research::sat::DomainDeductions::MarkProcessingAsDoneForNow</a></div><div class="ttdeci">void MarkProcessingAsDoneForNow()</div><div class="ttdef"><b>Definition:</b> <a href="presolve__util_8h_source.html#l00067">presolve_util.h:67</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_presolve_context_html_aa62da782b2270ca293531a0aea153fba"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_presolve_context.html#aa62da782b2270ca293531a0aea153fba">operations_research::sat::PresolveContext::CanonicalizeObjective</a></div><div class="ttdeci">ABSL_MUST_USE_RESULT bool CanonicalizeObjective()</div><div class="ttdef"><b>Definition:</b> <a href="presolve__context_8cc_source.html#l01364">presolve_context.cc:1364</a></div></div>
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<div class="ttc" id="namespaceoperations__research_1_1sat_html_a1a6eefe7a5bfd8bdf83407c9e6af56f5"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#a1a6eefe7a5bfd8bdf83407c9e6af56f5">operations_research::sat::LoadVariables</a></div><div class="ttdeci">void LoadVariables(const CpModelProto &model_proto, bool view_all_booleans_as_integers, Model *m)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model__loader_8cc_source.html#l00118">cp_model_loader.cc:118</a></div></div>
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<div class="ttc" id="namespaceoperations__research_1_1sat_html_a22efb1995471e34caa35927a9032f5f3"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#a22efb1995471e34caa35927a9032f5f3">operations_research::sat::SetToNegatedLinearExpression</a></div><div class="ttdeci">void SetToNegatedLinearExpression(const LinearExpressionProto &input_expr, LinearExpressionProto *output_negated_expr)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model__utils_8cc_source.html#l00034">cp_model_utils.cc:34</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_constraint_proto_html_ada030f50fcddb646af448ac7c5705e35a4d3274f97b77566895b3a239ed62bb72"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_constraint_proto.html#ada030f50fcddb646af448ac7c5705e35a4d3274f97b77566895b3a239ed62bb72">operations_research::sat::ConstraintProto::kIntMax</a></div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l03912">cp_model.pb.h:3912</a></div></div>
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<div class="ttc" id="constraint__solver_2table_8cc_html_acb18315d548212835cd8ed4287e6c0b6"><div class="ttname"><a href="constraint__solver_2table_8cc.html#acb18315d548212835cd8ed4287e6c0b6">a</a></div><div class="ttdeci">int64_t a</div><div class="ttdef"><b>Definition:</b> <a href="constraint__solver_2table_8cc_source.html#l00046">constraint_solver/table.cc:46</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_sat_parameters_html_a403eae27b83e71f1266efbbd1f4d9766"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#a403eae27b83e71f1266efbbd1f4d9766">operations_research::sat::SatParameters::keep_all_feasible_solutions_in_presolve</a></div><div class="ttdeci">bool keep_all_feasible_solutions_in_presolve() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l07264">sat_parameters.pb.h:7264</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_sat_parameters_html_a5afd677f3a39bcbd094567bae53c36b4"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#a5afd677f3a39bcbd094567bae53c36b4">operations_research::sat::SatParameters::presolve_substitution_level</a></div><div class="ttdeci">::PROTOBUF_NAMESPACE_ID::int32 presolve_substitution_level() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l05833">sat_parameters.pb.h:5833</a></div></div>
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<div class="ttc" id="classoperations__research_1_1sat_1_1_cp_objective_proto_html_a4392924fce7f5d9851171c0915a478a6"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_cp_objective_proto.html#a4392924fce7f5d9851171c0915a478a6">operations_research::sat::CpObjectiveProto::mutable_vars</a></div><div class="ttdeci">::PROTOBUF_NAMESPACE_ID::RepeatedField< ::PROTOBUF_NAMESPACE_ID::int32 > * mutable_vars()</div><div class="ttdef"><b>Definition:</b> <a href="cp__model_8pb_8h_source.html#l11277">cp_model.pb.h:11277</a></div></div>
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