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<div class="title">cp_model_presolve.h</div> </div>
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<a href="cp__model__presolve_8h.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>
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<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>
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<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>
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<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>
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<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">//</span></div>
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<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>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">//</span></div>
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<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>
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<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>
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<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>
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<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>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment">// limitations under the License.</span></div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>  </div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#ifndef OR_TOOLS_SAT_CP_MODEL_PRESOLVE_H_</span></div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#define OR_TOOLS_SAT_CP_MODEL_PRESOLVE_H_</span></div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>  </div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#include <cstdint></span></div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#include <vector></span></div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  </div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor">#include "<a class="code" href="cp__model_8pb_8h.html">ortools/sat/cp_model.pb.h</a>"</span></div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#include "<a class="code" href="cp__model__utils_8h.html">ortools/sat/cp_model_utils.h</a>"</span></div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#include "<a class="code" href="presolve__context_8h.html">ortools/sat/presolve_context.h</a>"</span></div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#include "<a class="code" href="presolve__util_8h.html">ortools/sat/presolve_util.h</a>"</span></div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include "<a class="code" href="sat__parameters_8pb_8h.html">ortools/sat/sat_parameters.pb.h</a>"</span></div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include "<a class="code" href="affine__relation_8h.html">ortools/util/affine_relation.h</a>"</span></div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include "<a class="code" href="bitset_8h.html">ortools/util/bitset.h</a>"</span></div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#include "<a class="code" href="sorted__interval__list_8h.html">ortools/util/sorted_interval_list.h</a>"</span></div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#include "<a class="code" href="time__limit_8h.html">ortools/util/time_limit.h</a>"</span></div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  </div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="keyword">namespace </span><a class="code" href="namespaceoperations__research.html">operations_research</a> {</div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="keyword">namespace </span>sat {</div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  </div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment">// Replaces all the instance of a variable i (and the literals referring to it)</span></div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment">// by mapping[i]. The definition of variables i is also moved to its new index.</span></div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment">// Variables with a negative mapping value are ignored and it is an error if</span></div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment">// such variable is referenced anywhere (this is CHECKed).</span></div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment">//</span></div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment">// The image of the mapping should be dense in [0, new_num_variables), this is</span></div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment">// also CHECKed.</span></div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</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>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keyword">const</span> PresolveContext& <a class="code" href="gurobi__interface_8cc.html#a5f287b83a753915ae862fed64f8640a6">context</a>);</div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  </div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment">// Presolves the initial content of presolved_model.</span></div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment">//</span></div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment">// This also creates a mapping model that encode the correspondence between the</span></div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment">// two problems. This works as follow:</span></div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment">// - The first variables of mapping_model are in one to one correspondence with</span></div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment">// the variables of the initial model.</span></div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment">// - The presolved_model variables are in one to one correspondence with the</span></div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment">// variable at the indices given by postsolve_mapping in the mapping model.</span></div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment">// - Fixing one of the two sets of variables and solving the model will assign</span></div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment">// the other set to a feasible solution of the other problem. Moreover, the</span></div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment">// objective value of these solutions will be the same. Note that solving such</span></div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment">// problems will take little time in practice because the propagation will</span></div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment">// basically do all the work.</span></div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment">//</span></div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment">// Note(user): an optimization model can be transformed into a decision problem,</span></div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment">// if for instance the objective is fixed, or independent from the rest of the</span></div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment">// problem.</span></div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment">//</span></div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment">// TODO(user): Identify disconnected components and returns a vector of</span></div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment">// presolved model? If we go this route, it may be nicer to store the indices</span></div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment">// inside the model. We can add a IntegerVariableProto::initial_index;</span></div>
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<div class="line"><a name="l00064"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_cp_model_presolver.html"> 64</a></span> <span class="keyword">class </span><a class="code" href="classoperations__research_1_1sat_1_1_cp_model_presolver.html">CpModelPresolver</a> {</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keyword">public</span>:</div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <a class="code" href="classoperations__research_1_1sat_1_1_cp_model_presolver.html#a7ebb6a65cb3d0da1dcf19929c38640e0">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>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  std::vector<int>* postsolve_mapping);</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  </div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="comment">// Returns false if a non-recoverable error was encountered.</span></div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="comment">//</span></div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="comment">// TODO(user): Make sure this can never run into this case provided that the</span></div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="comment">// initial model is valid!</span></div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="keywordtype">bool</span> <a class="code" href="classoperations__research_1_1sat_1_1_cp_model_presolver.html#a4357280dffaba15fcb7f932afe0aea3f">Presolve</a>();</div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  </div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="comment">// Executes presolve method for the given constraint. Public for testing only.</span></div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="keywordtype">bool</span> <a class="code" href="classoperations__research_1_1sat_1_1_cp_model_presolver.html#ab37522044009144ac6eff3b3d4c1d271">PresolveOneConstraint</a>(<span class="keywordtype">int</span> c);</div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  </div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="comment">// Public for testing only.</span></div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keywordtype">void</span> <a class="code" href="classoperations__research_1_1sat_1_1_cp_model_presolver.html#a6c402792bbe83aa90b75033080755f9b">RemoveEmptyConstraints</a>();</div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  </div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keyword">private</span>:</div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keywordtype">void</span> PresolveToFixPoint();</div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  </div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="comment">// Runs the probing.</span></div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keywordtype">void</span> Probe();</div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  </div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="comment">// Presolve functions.</span></div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="comment">//</span></div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="comment">// They should return false only if the constraint <-> variable graph didn't</span></div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="comment">// change. This is just an optimization, returning true is always correct.</span></div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="comment">//</span></div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="comment">// Invariant about UNSAT: All these functions should abort right away if</span></div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="comment">// context_.IsUnsat() is true. And the only way to change the status to unsat</span></div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="comment">// is through ABSL_MUST_USE_RESULT function that should also abort right away</span></div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="comment">// the current code. This way we shouldn't keep doing computation on an</span></div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="comment">// inconsistent state.</span></div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="comment">// TODO(user,user): Make these public and unit test.</span></div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keywordtype">bool</span> PresolveAutomaton(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keywordtype">bool</span> PresolveCircuit(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keywordtype">bool</span> PresolveRoutes(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keywordtype">bool</span> PresolveCumulative(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keywordtype">bool</span> PresolveNoOverlap(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keywordtype">bool</span> PresolveReservoir(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keywordtype">bool</span> PresolveAllDiff(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="keywordtype">bool</span> PresolveTable(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="keywordtype">bool</span> PresolveElement(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keywordtype">bool</span> PresolveInterval(<span class="keywordtype">int</span> c, ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keywordtype">bool</span> PresolveIntDiv(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keywordtype">bool</span> PresolveIntProd(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keywordtype">bool</span> PresolveIntMin(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keywordtype">bool</span> PresolveIntMax(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keywordtype">bool</span> PresolveLinMin(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <span class="keywordtype">bool</span> PresolveLinMax(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="keywordtype">bool</span> PresolveIntAbs(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <span class="keywordtype">bool</span> PresolveBoolXor(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  </div>
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<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="keywordtype">bool</span> PresolveAtMostOrExactlyOne(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keywordtype">bool</span> PresolveAtMostOne(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keywordtype">bool</span> PresolveExactlyOne(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  </div>
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<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="keywordtype">bool</span> PresolveBoolAnd(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keywordtype">bool</span> PresolveBoolOr(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="keywordtype">bool</span> PresolveEnforcementLiteral(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  </div>
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<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <span class="comment">// Regroups terms and substitute affine relations.</span></div>
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<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <span class="comment">// Returns true if the set of variables in the expression changed.</span></div>
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<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> ProtoWithVarsAndCoeffs></div>
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<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="keywordtype">bool</span> CanonicalizeLinearExpressionInternal(<span class="keyword">const</span> ConstraintProto& <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>,</div>
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<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  ProtoWithVarsAndCoeffs* <a class="code" href="cp__model__fz__solver_8cc.html#aed003f5eb5197bc586b7ef2c36a63da2">proto</a>,</div>
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<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  int64_t* offset);</div>
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<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="keywordtype">bool</span> CanonicalizeLinearExpression(<span class="keyword">const</span> ConstraintProto& <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>,</div>
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<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  LinearExpressionProto* exp);</div>
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<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  </div>
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<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="comment">// For the linear constraints, we have more than one function.</span></div>
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<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keywordtype">bool</span> CanonicalizeLinear(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="keywordtype">bool</span> PropagateDomainsInLinear(<span class="keywordtype">int</span> c, ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="keywordtype">bool</span> RemoveSingletonInLinear(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="keywordtype">bool</span> PresolveSmallLinear(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="keywordtype">bool</span> PresolveLinearOnBooleans(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <span class="keywordtype">void</span> PresolveLinearEqualityModuloTwo(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  </div>
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<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  <span class="comment">// To simplify dealing with the two kind of intervals.</span></div>
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<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  int64_t StartMin(<span class="keyword">const</span> IntervalConstraintProto& <a class="code" href="resource_8cc.html#af92a8383a05fdf586a52263d358f5ada">interval</a>) <span class="keyword">const</span>;</div>
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<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  int64_t EndMax(<span class="keyword">const</span> IntervalConstraintProto& <a class="code" href="resource_8cc.html#af92a8383a05fdf586a52263d358f5ada">interval</a>) <span class="keyword">const</span>;</div>
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<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  int64_t SizeMin(<span class="keyword">const</span> IntervalConstraintProto& <a class="code" href="resource_8cc.html#af92a8383a05fdf586a52263d358f5ada">interval</a>) <span class="keyword">const</span>;</div>
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<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  int64_t SizeMax(<span class="keyword">const</span> IntervalConstraintProto& <a class="code" href="resource_8cc.html#af92a8383a05fdf586a52263d358f5ada">interval</a>) <span class="keyword">const</span>;</div>
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<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  </div>
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<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <span class="comment">// SetPPC is short for set packing, partitioning and covering constraints.</span></div>
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<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <span class="comment">// These are sum of booleans <=, = and >= 1 respectively.</span></div>
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<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="keywordtype">bool</span> ProcessSetPPC();</div>
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<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  </div>
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<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <span class="comment">// Removes dominated constraints or fixes some variables for given pair of</span></div>
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<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <span class="comment">// setppc constraints. This assumes that literals in constraint c1 is subset</span></div>
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<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="comment">// of literals in constraint c2.</span></div>
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<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="keywordtype">bool</span> ProcessSetPPCSubset(<span class="keywordtype">int</span> c1, <span class="keywordtype">int</span> c2, <span class="keyword">const</span> std::vector<int>& c2_minus_c1,</div>
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<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  <span class="keyword">const</span> std::vector<int>& original_constraint_index,</div>
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<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  std::vector<bool>* marked_for_removal);</div>
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<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  </div>
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<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  <span class="keywordtype">void</span> PresolvePureSatPart();</div>
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<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  </div>
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<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <span class="comment">// Extracts AtMostOne constraint from Linear constraint.</span></div>
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<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="keywordtype">void</span> ExtractAtMostOneFromLinear(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  </div>
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<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keywordtype">void</span> DivideLinearByGcd(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  </div>
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<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <span class="keywordtype">void</span> ExtractEnforcementLiteralFromLinearConstraint(<span class="keywordtype">int</span> ct_index,</div>
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<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  </div>
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<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  <span class="comment">// Extracts cliques from bool_and and small at_most_one constraints and</span></div>
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<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  <span class="comment">// transforms them into maximal cliques.</span></div>
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<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  <span class="keywordtype">void</span> TransformIntoMaxCliques();</div>
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<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  </div>
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<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="comment">// Converts bool_or and at_most_one of size 2 to bool_and.</span></div>
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<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  <span class="keywordtype">void</span> ExtractBoolAnd();</div>
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<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  </div>
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<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <span class="keywordtype">void</span> ExpandObjective();</div>
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<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  </div>
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<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  <span class="keywordtype">void</span> TryToSimplifyDomain(<span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div>
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<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  </div>
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<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="keywordtype">void</span> MergeNoOverlapConstraints();</div>
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<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  </div>
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<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <span class="comment">// Boths function are responsible for dealing with affine relations.</span></div>
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<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  <span class="comment">// The second one returns false on UNSAT.</span></div>
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<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="keywordtype">void</span> EncodeAllAffineRelations();</div>
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<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  <span class="keywordtype">bool</span> PresolveAffineRelationIfAny(<span class="keywordtype">int</span> <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div>
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<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  </div>
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<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  <span class="keywordtype">bool</span> ExploitEquivalenceRelations(<span class="keywordtype">int</span> c, ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  </div>
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<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  ABSL_MUST_USE_RESULT <span class="keywordtype">bool</span> RemoveConstraint(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  ABSL_MUST_USE_RESULT <span class="keywordtype">bool</span> MarkConstraintAsFalse(ConstraintProto* <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  </div>
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<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  std::vector<int>* postsolve_mapping_;</div>
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<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  <a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html">PresolveContext</a>* context_;</div>
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<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  <a class="code" href="classoperations__research_1_1_solver_logger.html">SolverLogger</a>* logger_;</div>
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<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  </div>
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<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <span class="comment">// Used by CanonicalizeLinearExpressionInternal().</span></div>
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<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  std::vector<std::pair<int, int64_t>> tmp_terms_;</div>
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<div class="line"><a name="l00198"></a><span class="lineno"> 198</span> };</div>
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<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  </div>
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<div class="line"><a name="l00200"></a><span class="lineno"> 200</span> <span class="comment">// This helper class perform copy with simplification from a model and a</span></div>
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<div class="line"><a name="l00201"></a><span class="lineno"> 201</span> <span class="comment">// partial assignment to another model. The purpose is to miminize the size of</span></div>
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<div class="line"><a name="l00202"></a><span class="lineno"> 202</span> <span class="comment">// the copied model, as well as to reduce the pressure on the memory sub-system.</span></div>
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<div class="line"><a name="l00203"></a><span class="lineno"> 203</span> <span class="comment">//</span></div>
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<div class="line"><a name="l00204"></a><span class="lineno"> 204</span> <span class="comment">// It is currently used by the LNS part, but could be used with any other scheme</span></div>
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<div class="line"><a name="l00205"></a><span class="lineno"> 205</span> <span class="comment">// that generates partial assignments.</span></div>
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<div class="line"><a name="l00206"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_model_copy.html"> 206</a></span> <span class="keyword">class </span><a class="code" href="classoperations__research_1_1sat_1_1_model_copy.html">ModelCopy</a> {</div>
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<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  <span class="keyword">public</span>:</div>
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<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <span class="keyword">explicit</span> <a class="code" href="classoperations__research_1_1sat_1_1_model_copy.html#a4dc4003514ad43b655e41524c32352f1">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>);</div>
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<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  </div>
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<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  <span class="comment">// Copies all constraints from in_model to working model of the context.</span></div>
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<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="comment">//</span></div>
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<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  <span class="comment">// During the process, it will read variable domains from the context, and</span></div>
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<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  <span class="comment">// simplify constraints to minimize the size of the copied model.</span></div>
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<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  <span class="comment">// Thus it is important that the context->working_model already have the</span></div>
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<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  <span class="comment">// variables part copied.</span></div>
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<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  <span class="comment">//</span></div>
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<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  <span class="comment">// It returns false iff the model is proven infeasible.</span></div>
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<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <span class="comment">//</span></div>
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<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  <span class="comment">// It does not clear the constraints part of the working model of the context.</span></div>
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<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  <span class="keywordtype">bool</span> <a class="code" href="classoperations__research_1_1sat_1_1_model_copy.html#ad74e75903c729a01bd681095bd51ff4e">ImportAndSimplifyConstraints</a>(</div>
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<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <span class="keyword">const</span> CpModelProto& in_model,</div>
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<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="keyword">const</span> std::vector<int>& ignored_constraints);</div>
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<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  </div>
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<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  <span class="keyword">private</span>:</div>
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<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  <span class="comment">// Overwrites the out_model to be unsat. Returns false.</span></div>
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<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  <span class="keywordtype">bool</span> CreateUnsatModel();</div>
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<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  </div>
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<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  <span class="keywordtype">void</span> CopyEnforcementLiterals(<span class="keyword">const</span> ConstraintProto& orig,</div>
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<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  ConstraintProto* dest);</div>
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<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  <span class="keywordtype">bool</span> OneEnforcementLiteralIsFalse(<span class="keyword">const</span> ConstraintProto& <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>) <span class="keyword">const</span>;</div>
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<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  </div>
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<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  <span class="comment">// All these functions return false if the constraint is found infeasible.</span></div>
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<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  <span class="keywordtype">bool</span> CopyBoolOr(<span class="keyword">const</span> ConstraintProto& <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  <span class="keywordtype">bool</span> CopyBoolAnd(<span class="keyword">const</span> ConstraintProto& <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  <span class="keywordtype">bool</span> CopyLinear(<span class="keyword">const</span> ConstraintProto& <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  <span class="keywordtype">bool</span> CopyAtMostOne(<span class="keyword">const</span> ConstraintProto& <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  <span class="keywordtype">bool</span> CopyExactlyOne(<span class="keyword">const</span> ConstraintProto& <a class="code" href="demon__profiler_8cc.html#a05da18ca9c7b657a4a6ea24e07c9b695">ct</a>);</div>
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<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  <span class="keywordtype">bool</span> 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>
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<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  </div>
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<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <a class="code" href="classoperations__research_1_1sat_1_1_presolve_context.html">PresolveContext</a>* context_;</div>
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<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  int64_t skipped_non_zero_ = 0;</div>
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<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  </div>
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<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  <span class="comment">// Temp vectors.</span></div>
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<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  std::vector<int> non_fixed_variables_;</div>
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<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  std::vector<int64_t> non_fixed_coefficients_;</div>
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<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  absl::flat_hash_map<int, int> interval_mapping_;</div>
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<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  <span class="keywordtype">int</span> starting_constraint_index_ = 0;</div>
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<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  std::vector<int> temp_enforcement_literals_;</div>
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<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  std::vector<int> temp_literals_;</div>
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<div class="line"><a name="l00250"></a><span class="lineno"> 250</span> };</div>
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<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  </div>
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<div class="line"><a name="l00252"></a><span class="lineno"> 252</span> <span class="comment">// Import the constraints from the in_model to the presolve context.</span></div>
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<div class="line"><a name="l00253"></a><span class="lineno"> 253</span> <span class="comment">// It performs on the fly simplification, and returns false if the</span></div>
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<div class="line"><a name="l00254"></a><span class="lineno"> 254</span> <span class="comment">// model is proved infeasible.</span></div>
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<div class="line"><a name="l00255"></a><span class="lineno"> 255</span> <span class="keywordtype">bool</span> <a class="code" href="namespaceoperations__research_1_1sat.html#a980f3e04f0fac2f0f8a7ff4c73572922">ImportConstraintsWithBasicPresolveIntoContext</a>(<span class="keyword">const</span> CpModelProto& in_model,</div>
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<div class="line"><a name="l00256"></a><span class="lineno"> 256</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>
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<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  </div>
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<div class="line"><a name="l00258"></a><span class="lineno"> 258</span> <span class="comment">// Copies the non constraint, non variables part of the model.</span></div>
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<div class="line"><a name="l00259"></a><span class="lineno"> 259</span> <span class="keywordtype">void</span> <a class="code" href="namespaceoperations__research_1_1sat.html#a8e28f522e1d211cabbdcff4fd3028593">CopyEverythingExceptVariablesAndConstraintsFieldsIntoContext</a>(</div>
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<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  <span class="keyword">const</span> CpModelProto& 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>
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<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  </div>
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<div class="line"><a name="l00262"></a><span class="lineno"> 262</span> <span class="comment">// Convenient wrapper to call the full presolve.</span></div>
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<div class="line"><a name="l00263"></a><span class="lineno"> 263</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>
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<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  std::vector<int>* postsolve_mapping);</div>
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<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  </div>
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<div class="line"><a name="l00266"></a><span class="lineno"> 266</span> <span class="comment">// Returns the index of exact duplicate constraints in the given proto. That</span></div>
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<div class="line"><a name="l00267"></a><span class="lineno"> 267</span> <span class="comment">// is, all returned constraints will have an identical constraint before it in</span></div>
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<div class="line"><a name="l00268"></a><span class="lineno"> 268</span> <span class="comment">// the model_proto.constraints() list. Empty constraints are ignored.</span></div>
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<div class="line"><a name="l00269"></a><span class="lineno"> 269</span> <span class="comment">//</span></div>
|
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<div class="line"><a name="l00270"></a><span class="lineno"> 270</span> <span class="comment">// Visible here for testing. This is meant to be called at the end of the</span></div>
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<div class="line"><a name="l00271"></a><span class="lineno"> 271</span> <span class="comment">// presolve where constraints have been canonicalized.</span></div>
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<div class="line"><a name="l00272"></a><span class="lineno"> 272</span> <span class="comment">//</span></div>
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<div class="line"><a name="l00273"></a><span class="lineno"> 273</span> <span class="comment">// TODO(user): Ignore names? canonicalize constraint further by sorting</span></div>
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<div class="line"><a name="l00274"></a><span class="lineno"> 274</span> <span class="comment">// enforcement literal list for instance...</span></div>
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<div class="line"><a name="l00275"></a><span class="lineno"> 275</span> std::vector<int> <a class="code" href="namespaceoperations__research_1_1sat.html#a90650dff7fc501dfe17041e0cb5388fd">FindDuplicateConstraints</a>(<span class="keyword">const</span> CpModelProto& <a class="code" href="cp__model__solver_8cc.html#a6ac76d8a372013f67c4973012948ec84">model_proto</a>);</div>
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<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  </div>
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<div class="line"><a name="l00277"></a><span class="lineno"> 277</span> } <span class="comment">// namespace sat</span></div>
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<div class="line"><a name="l00278"></a><span class="lineno"> 278</span> } <span class="comment">// namespace operations_research</span></div>
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<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  </div>
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<div class="line"><a name="l00280"></a><span class="lineno"> 280</span> <span class="preprocessor">#endif </span><span class="comment">// OR_TOOLS_SAT_CP_MODEL_PRESOLVE_H_</span></div>
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<div class="ttc" id="aaffine__relation_8h_html"><div class="ttname"><a href="affine__relation_8h.html">affine_relation.h</a></div></div>
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<div class="ttc" id="abitset_8h_html"><div class="ttname"><a href="bitset_8h.html">bitset.h</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_solver_logger_html"><div class="ttname"><a href="classoperations__research_1_1_solver_logger.html">operations_research::SolverLogger</a></div><div class="ttdef"><b>Definition:</b> <a href="util_2logging_8h_source.html#l00033">util/logging.h:33</a></div></div>
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<div class="ttc" id="aclassoperations__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="aclassoperations__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#l05565">cp_model_presolve.cc:5565</a></div></div>
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<div class="ttc" id="aclassoperations__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#l00065">cp_model_presolve.cc:65</a></div></div>
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<div class="ttc" id="aclassoperations__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#l05519">cp_model_presolve.cc:5519</a></div></div>
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<div class="ttc" id="aclassoperations__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#l04522">cp_model_presolve.cc:4522</a></div></div>
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<div class="ttc" id="aclassoperations__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="aclassoperations__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#l05207">cp_model_presolve.cc:5207</a></div></div>
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<div class="ttc" id="aclassoperations__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#l05210">cp_model_presolve.cc:5210</a></div></div>
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<div class="ttc" id="aclassoperations__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#l00070">presolve_context.h:70</a></div></div>
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<div class="ttc" id="acp__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="acp__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#l00107">cp_model_fz_solver.cc:107</a></div></div>
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<div class="ttc" id="acp__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#l02150">cp_model_solver.cc:2150</a></div></div>
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<div class="ttc" id="acp__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="ademon__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="aexpr__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="agurobi__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="anamespaceoperations__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#l05513">cp_model_presolve.cc:5513</a></div></div>
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<div class="ttc" id="anamespaceoperations__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#l05486">cp_model_presolve.cc:5486</a></div></div>
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<div class="ttc" id="anamespaceoperations__research_1_1sat_html_a90650dff7fc501dfe17041e0cb5388fd"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#a90650dff7fc501dfe17041e0cb5388fd">operations_research::sat::FindDuplicateConstraints</a></div><div class="ttdeci">std::vector< int > FindDuplicateConstraints(const CpModelProto &model_proto)</div><div class="ttdef"><b>Definition:</b> <a href="cp__model__presolve_8cc_source.html#l05965">cp_model_presolve.cc:5965</a></div></div>
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<div class="ttc" id="anamespaceoperations__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#l05475">cp_model_presolve.cc:5475</a></div></div>
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<div class="ttc" id="anamespaceoperations__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#l05861">cp_model_presolve.cc:5861</a></div></div>
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<div class="ttc" id="anamespaceoperations__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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