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<a href="sat__inprocessing_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" 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 id="l00002" 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 id="l00003" 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 id="l00004" 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 id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="comment">//</span></div>
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<div class="line"><a id="l00006" 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 id="l00007" name="l00007"></a><span class="lineno"> 7</span><span class="comment">//</span></div>
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<div class="line"><a id="l00008" 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 id="l00009" 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 id="l00010" 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 id="l00011" 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 id="l00012" 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 id="l00013" name="l00013"></a><span class="lineno"> 13</span> </div>
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<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span><span class="comment">// This file contains the entry point for our presolve/inprocessing code.</span></div>
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<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span><span class="comment">//</span></div>
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<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span><span class="comment">// TODO(user): for now it is mainly presolve, but the idea is to call these</span></div>
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<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span><span class="comment">// function during the search so they should be as incremental as possible. That</span></div>
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<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span><span class="comment">// is avoid doing work that is not useful because nothing changed or exploring</span></div>
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<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span><span class="comment">// parts that were not done during the last round.</span></div>
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<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span> </div>
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<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span><span class="preprocessor">#ifndef OR_TOOLS_SAT_SAT_INPROCESSING_H_</span></div>
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<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span><span class="preprocessor">#define OR_TOOLS_SAT_SAT_INPROCESSING_H_</span></div>
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<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span> </div>
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<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span><span class="preprocessor">#include <cstdint></span></div>
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<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span><span class="preprocessor">#include <deque></span></div>
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<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span><span class="preprocessor">#include <vector></span></div>
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<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span> </div>
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<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span><span class="preprocessor">#include "absl/strings/string_view.h"</span></div>
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<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span><span class="preprocessor">#include "absl/types/span.h"</span></div>
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<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span><span class="preprocessor">#include "<a class="code" href="strong__vector_8h.html">ortools/base/strong_vector.h</a>"</span></div>
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<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span><span class="preprocessor">#include "<a class="code" href="clause_8h.html">ortools/sat/clause.h</a>"</span></div>
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<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span><span class="preprocessor">#include "<a class="code" href="drat__checker_8h.html">ortools/sat/drat_checker.h</a>"</span></div>
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<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span><span class="preprocessor">#include "<a class="code" href="sat_2model_8h.html">ortools/sat/model.h</a>"</span></div>
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<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span><span class="preprocessor">#include "<a class="code" href="sat__base_8h.html">ortools/sat/sat_base.h</a>"</span></div>
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<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span><span class="preprocessor">#include "<a class="code" href="sat__decision_8h.html">ortools/sat/sat_decision.h</a>"</span></div>
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<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span><span class="preprocessor">#include "ortools/sat/sat_parameters.pb.h"</span></div>
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<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span><span class="preprocessor">#include "<a class="code" href="sat__solver_8h.html">ortools/sat/sat_solver.h</a>"</span></div>
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<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span><span class="preprocessor">#include "<a class="code" href="sat_2util_8h.html">ortools/sat/util.h</a>"</span></div>
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<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span><span class="preprocessor">#include "<a class="code" href="integer__pq_8h.html">ortools/util/integer_pq.h</a>"</span></div>
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<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span><span class="preprocessor">#include "<a class="code" href="strong__integers_8h.html">ortools/util/strong_integers.h</a>"</span></div>
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<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</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 id="l00042" name="l00042"></a><span class="lineno"> 42</span> </div>
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<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespaceoperations__research.html">operations_research</a> {</div>
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<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span><span class="keyword">namespace </span>sat {</div>
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<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> </div>
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<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span><span class="comment">// The order is important and each clauses has a "special" literal that is</span></div>
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<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span><span class="comment">// put first.</span></div>
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<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span><span class="comment">//</span></div>
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<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span><span class="comment">// TODO(user): Use a flat memory structure instead.</span></div>
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<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"><a class="line" href="structoperations__research_1_1sat_1_1_postsolve_clauses.html"> 50</a></span><span class="keyword">struct </span><a class="code hl_struct" href="structoperations__research_1_1sat_1_1_postsolve_clauses.html">PostsolveClauses</a> {</div>
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<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> <span class="comment">// Utility function that push back clause but also make sure the given literal</span></div>
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<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> <span class="comment">// from clause appear first.</span></div>
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<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> <span class="keywordtype">void</span> <a class="code hl_function" href="structoperations__research_1_1sat_1_1_postsolve_clauses.html#ae70f41a3895b08dd35056d97eec1800e">AddClauseWithSpecialLiteral</a>(<a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a> <a class="code hl_variable" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>,</div>
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<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> absl::Span<const Literal> clause);</div>
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<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> </div>
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<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"><a class="line" href="structoperations__research_1_1sat_1_1_postsolve_clauses.html#a8cc6d9f1059f26a873442045a72e651e"> 56</a></span> std::deque<std::vector<Literal>> <a class="code hl_variable" href="structoperations__research_1_1sat_1_1_postsolve_clauses.html#a8cc6d9f1059f26a873442045a72e651e">clauses</a>;</div>
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<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span>};</div>
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<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> </div>
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<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span><span class="keyword">class </span><a class="code hl_class" href="classoperations__research_1_1sat_1_1_blocked_clause_simplifier.html">BlockedClauseSimplifier</a>;</div>
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<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span><span class="keyword">class </span><a class="code hl_class" href="classoperations__research_1_1sat_1_1_bounded_variable_elimination.html">BoundedVariableElimination</a>;</div>
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<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span><span class="keyword">class </span><a class="code hl_class" href="classoperations__research_1_1sat_1_1_stamping_simplifier.html">StampingSimplifier</a>;</div>
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<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> </div>
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<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"><a class="line" href="structoperations__research_1_1sat_1_1_sat_presolve_options.html"> 63</a></span><span class="keyword">struct </span><a class="code hl_struct" href="structoperations__research_1_1sat_1_1_sat_presolve_options.html">SatPresolveOptions</a> {</div>
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<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> <span class="comment">// The time budget to spend.</span></div>
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<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"><a class="line" href="structoperations__research_1_1sat_1_1_sat_presolve_options.html#afac11ce59af8fa30ab784cfa4fb36297"> 65</a></span> <span class="keywordtype">double</span> <a class="code hl_variable" href="structoperations__research_1_1sat_1_1_sat_presolve_options.html#afac11ce59af8fa30ab784cfa4fb36297">deterministic_time_limit</a> = 30.0;</div>
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<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> </div>
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<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> <span class="comment">// We assume this is also true if --v 1 is activated and we actually log</span></div>
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<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> <span class="comment">// even more in --v 1.</span></div>
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<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"><a class="line" href="structoperations__research_1_1sat_1_1_sat_presolve_options.html#a54320231778412ca00e50eb821c95aa6"> 69</a></span> <span class="keywordtype">bool</span> <a class="code hl_variable" href="structoperations__research_1_1sat_1_1_sat_presolve_options.html#a54320231778412ca00e50eb821c95aa6">log_info</a> = <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> </div>
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<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> <span class="comment">// See ProbingOptions in probing.h</span></div>
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<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"><a class="line" href="structoperations__research_1_1sat_1_1_sat_presolve_options.html#ac68dd5a27fd973b215de47442bacf1ac"> 72</a></span> <span class="keywordtype">bool</span> <a class="code hl_variable" href="structoperations__research_1_1sat_1_1_sat_presolve_options.html#ac68dd5a27fd973b215de47442bacf1ac">extract_binary_clauses_in_probing</a> = <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> </div>
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<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> <span class="comment">// Whether we perform a transitive reduction of the binary implication graph</span></div>
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<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span> <span class="comment">// after equivalent literal detection and before each probing pass.</span></div>
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<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> <span class="comment">//</span></div>
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<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> <span class="comment">// TODO(user): Doing that before the current SAT presolve also change the</span></div>
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<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> <span class="comment">// possible reduction. This shouldn't matter if we use the binary implication</span></div>
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<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> <span class="comment">// graph and its reachability instead of just binary clause though.</span></div>
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<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"><a class="line" href="structoperations__research_1_1sat_1_1_sat_presolve_options.html#a9251c24a19aaef6f5134a615eff02277"> 80</a></span> <span class="keywordtype">bool</span> <a class="code hl_variable" href="structoperations__research_1_1sat_1_1_sat_presolve_options.html#a9251c24a19aaef6f5134a615eff02277">use_transitive_reduction</a> = <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span>};</div>
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<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span> </div>
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<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span><span class="comment">// We need to keep some information from one call to the next, so we use a</span></div>
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<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span><span class="comment">// class. Note that as this becomes big, we can probably split it.</span></div>
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<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span><span class="comment">//</span></div>
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<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span><span class="comment">// TODO(user): Some algorithms here use the normal SAT propagation engine.</span></div>
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<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span><span class="comment">// However we might want to temporarily disable activities/phase saving and so</span></div>
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<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span><span class="comment">// on if we want to run them as in-processing steps so that they</span></div>
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<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"> 89</span><span class="comment">// do not "pollute" the normal SAT search.</span></div>
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<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span><span class="comment">//</span></div>
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<div class="line"><a id="l00091" name="l00091"></a><span class="lineno"> 91</span><span class="comment">// TODO(user): For the propagation, this depends on the SatSolver class, which</span></div>
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<div class="line"><a id="l00092" name="l00092"></a><span class="lineno"> 92</span><span class="comment">// mean we cannot really use it without some refactoring as an in-processing</span></div>
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<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"> 93</span><span class="comment">// from the SatSolver::Solve() function. So we do need a special</span></div>
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<div class="line"><a id="l00094" name="l00094"></a><span class="lineno"> 94</span><span class="comment">// InprocessingSolve() that lives outside SatSolver. Alternatively, we can</span></div>
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<div class="line"><a id="l00095" name="l00095"></a><span class="lineno"> 95</span><span class="comment">// extract the propagation main loop and conflict analysis from SatSolver.</span></div>
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<div class="line"><a id="l00096" name="l00096"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_inprocessing.html"> 96</a></span><span class="keyword">class </span><a class="code hl_class" href="classoperations__research_1_1sat_1_1_inprocessing.html">Inprocessing</a> {</div>
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<div class="line"><a id="l00097" name="l00097"></a><span class="lineno"> 97</span> <span class="keyword">public</span>:</div>
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<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_inprocessing.html#ad24fc03309c423341f1aed176b070cd0"> 98</a></span> <span class="keyword">explicit</span> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_inprocessing.html#ad24fc03309c423341f1aed176b070cd0">Inprocessing</a>(<a class="code hl_class" href="classoperations__research_1_1sat_1_1_model.html">Model</a>* <a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>)</div>
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<div class="line"><a id="l00099" name="l00099"></a><span class="lineno"> 99</span> : assignment_(<a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>->GetOrCreate<<a class="code hl_class" href="classoperations__research_1_1sat_1_1_trail.html">Trail</a>>()-><a class="code hl_class" href="classoperations__research_1_1_assignment.html">Assignment</a>()),</div>
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<div class="line"><a id="l00100" name="l00100"></a><span class="lineno"> 100</span> implication_graph_(<a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>->GetOrCreate<<a class="code hl_class" href="classoperations__research_1_1sat_1_1_binary_implication_graph.html">BinaryImplicationGraph</a>>()),</div>
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<div class="line"><a id="l00101" name="l00101"></a><span class="lineno"> 101</span> clause_manager_(<a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>->GetOrCreate<<a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal_watchers.html">LiteralWatchers</a>>()),</div>
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<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"> 102</span> trail_(<a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>->GetOrCreate<<a class="code hl_class" href="classoperations__research_1_1sat_1_1_trail.html">Trail</a>>()),</div>
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<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"> 103</span> decision_policy_(<a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>->GetOrCreate<<a class="code hl_class" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html">SatDecisionPolicy</a>>()),</div>
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<div class="line"><a id="l00104" name="l00104"></a><span class="lineno"> 104</span> time_limit_(<a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>->GetOrCreate<<a class="code hl_class" href="classoperations__research_1_1_time_limit.html">TimeLimit</a>>()),</div>
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<div class="line"><a id="l00105" name="l00105"></a><span class="lineno"> 105</span> sat_solver_(<a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>->GetOrCreate<<a class="code hl_class" href="classoperations__research_1_1sat_1_1_sat_solver.html">SatSolver</a>>()),</div>
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<div class="line"><a id="l00106" name="l00106"></a><span class="lineno"> 106</span> stamping_simplifier_(<a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>->GetOrCreate<<a class="code hl_class" href="classoperations__research_1_1sat_1_1_stamping_simplifier.html">StampingSimplifier</a>>()),</div>
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<div class="line"><a id="l00107" name="l00107"></a><span class="lineno"> 107</span> blocked_clause_simplifier_(</div>
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<div class="line"><a id="l00108" name="l00108"></a><span class="lineno"> 108</span> <a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>->GetOrCreate<<a class="code hl_class" href="classoperations__research_1_1sat_1_1_blocked_clause_simplifier.html">BlockedClauseSimplifier</a>>()),</div>
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<div class="line"><a id="l00109" name="l00109"></a><span class="lineno"> 109</span> bounded_variable_elimination_(</div>
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<div class="line"><a id="l00110" name="l00110"></a><span class="lineno"> 110</span> <a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>->GetOrCreate<<a class="code hl_class" href="classoperations__research_1_1sat_1_1_bounded_variable_elimination.html">BoundedVariableElimination</a>>()),</div>
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<div class="line"><a id="l00111" name="l00111"></a><span class="lineno"> 111</span> model_(<a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>) {}</div>
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<div class="line"><a id="l00112" name="l00112"></a><span class="lineno"> 112</span> </div>
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<div class="line"><a id="l00113" name="l00113"></a><span class="lineno"> 113</span> <span class="comment">// Does some simplifications until a fix point is reached or the given</span></div>
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<div class="line"><a id="l00114" name="l00114"></a><span class="lineno"> 114</span> <span class="comment">// deterministic time is passed.</span></div>
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<div class="line"><a id="l00115" name="l00115"></a><span class="lineno"> 115</span> <span class="keywordtype">bool</span> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_inprocessing.html#a33abe26c0696a328c36dd0aa9f0b0f00">PresolveLoop</a>(<a class="code hl_struct" href="structoperations__research_1_1sat_1_1_sat_presolve_options.html">SatPresolveOptions</a> options);</div>
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<div class="line"><a id="l00116" name="l00116"></a><span class="lineno"> 116</span> </div>
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<div class="line"><a id="l00117" name="l00117"></a><span class="lineno"> 117</span> <span class="comment">// When the option use_sat_inprocessing is true, then this is called at each</span></div>
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<div class="line"><a id="l00118" name="l00118"></a><span class="lineno"> 118</span> <span class="comment">// restart. It is up to the heuristics here to decide what inprocessing we</span></div>
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<div class="line"><a id="l00119" name="l00119"></a><span class="lineno"> 119</span> <span class="comment">// do or if we wait for the next call before doing anything.</span></div>
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<div class="line"><a id="l00120" name="l00120"></a><span class="lineno"> 120</span> <span class="keywordtype">bool</span> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_inprocessing.html#a2e5437cb35da63545f954a80536023e0">InprocessingRound</a>();</div>
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<div class="line"><a id="l00121" name="l00121"></a><span class="lineno"> 121</span> </div>
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<div class="line"><a id="l00122" name="l00122"></a><span class="lineno"> 122</span> <span class="comment">// Simple wrapper that makes sure all the clauses are attached before a</span></div>
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<div class="line"><a id="l00123" name="l00123"></a><span class="lineno"> 123</span> <span class="comment">// propagation is performed.</span></div>
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<div class="line"><a id="l00124" name="l00124"></a><span class="lineno"> 124</span> <span class="keywordtype">bool</span> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_inprocessing.html#a7fefd67efe60192540adcc4bdea29836">LevelZeroPropagate</a>();</div>
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<div class="line"><a id="l00125" name="l00125"></a><span class="lineno"> 125</span> </div>
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<div class="line"><a id="l00126" name="l00126"></a><span class="lineno"> 126</span> <span class="comment">// Detects equivalences in the implication graph and propagates any failed</span></div>
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<div class="line"><a id="l00127" name="l00127"></a><span class="lineno"> 127</span> <span class="comment">// literal found during the process.</span></div>
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<div class="line"><a id="l00128" name="l00128"></a><span class="lineno"> 128</span> <span class="keywordtype">bool</span> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_inprocessing.html#af933a36985c24ffed84da1ac4f159e43">DetectEquivalencesAndStamp</a>(<span class="keywordtype">bool</span> use_transitive_reduction, <span class="keywordtype">bool</span> log_info);</div>
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<div class="line"><a id="l00129" name="l00129"></a><span class="lineno"> 129</span> </div>
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<div class="line"><a id="l00130" name="l00130"></a><span class="lineno"> 130</span> <span class="comment">// Removes fixed variables and exploit equivalence relations to cleanup the</span></div>
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<div class="line"><a id="l00131" name="l00131"></a><span class="lineno"> 131</span> <span class="comment">// clauses. Returns false if UNSAT.</span></div>
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<div class="line"><a id="l00132" name="l00132"></a><span class="lineno"> 132</span> <span class="keywordtype">bool</span> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_inprocessing.html#a5641f2b95c6ba972fff06ddd6ff5e29b">RemoveFixedAndEquivalentVariables</a>(<span class="keywordtype">bool</span> log_info);</div>
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<div class="line"><a id="l00133" name="l00133"></a><span class="lineno"> 133</span> </div>
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<div class="line"><a id="l00134" name="l00134"></a><span class="lineno"> 134</span> <span class="comment">// Returns true if there is new fixed variables or new equivalence relations</span></div>
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<div class="line"><a id="l00135" name="l00135"></a><span class="lineno"> 135</span> <span class="comment">// since RemoveFixedAndEquivalentVariables() was last called.</span></div>
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<div class="line"><a id="l00136" name="l00136"></a><span class="lineno"> 136</span> <span class="keywordtype">bool</span> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_inprocessing.html#a55d41aea8582d314b14874b133eb8bcb">MoreFixedVariableToClean</a>() <span class="keyword">const</span>;</div>
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<div class="line"><a id="l00137" name="l00137"></a><span class="lineno"> 137</span> <span class="keywordtype">bool</span> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_inprocessing.html#ae07d2afcdeb4149564918774bb584c17">MoreRedundantVariableToClean</a>() <span class="keyword">const</span>;</div>
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<div class="line"><a id="l00138" name="l00138"></a><span class="lineno"> 138</span> </div>
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<div class="line"><a id="l00139" name="l00139"></a><span class="lineno"> 139</span> <span class="comment">// Processes all clauses and see if there is any subsumption/strenghtening</span></div>
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<div class="line"><a id="l00140" name="l00140"></a><span class="lineno"> 140</span> <span class="comment">// reductions that can be performed. Returns false if UNSAT.</span></div>
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<div class="line"><a id="l00141" name="l00141"></a><span class="lineno"> 141</span> <span class="keywordtype">bool</span> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_inprocessing.html#aeb638f5ec6c2dd765d96e06926c4143f">SubsumeAndStrenghtenRound</a>(<span class="keywordtype">bool</span> log_info);</div>
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<div class="line"><a id="l00142" name="l00142"></a><span class="lineno"> 142</span> </div>
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<div class="line"><a id="l00143" name="l00143"></a><span class="lineno"> 143</span> <span class="keyword">private</span>:</div>
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<div class="line"><a id="l00144" name="l00144"></a><span class="lineno"> 144</span> <span class="keyword">const</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_variables_assignment.html">VariablesAssignment</a>& assignment_;</div>
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<div class="line"><a id="l00145" name="l00145"></a><span class="lineno"> 145</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_binary_implication_graph.html">BinaryImplicationGraph</a>* implication_graph_;</div>
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<div class="line"><a id="l00146" name="l00146"></a><span class="lineno"> 146</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal_watchers.html">LiteralWatchers</a>* clause_manager_;</div>
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<div class="line"><a id="l00147" name="l00147"></a><span class="lineno"> 147</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_trail.html">Trail</a>* trail_;</div>
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<div class="line"><a id="l00148" name="l00148"></a><span class="lineno"> 148</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html">SatDecisionPolicy</a>* decision_policy_;</div>
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<div class="line"><a id="l00149" name="l00149"></a><span class="lineno"> 149</span> <a class="code hl_class" href="classoperations__research_1_1_time_limit.html">TimeLimit</a>* time_limit_;</div>
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<div class="line"><a id="l00150" name="l00150"></a><span class="lineno"> 150</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_sat_solver.html">SatSolver</a>* sat_solver_;</div>
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<div class="line"><a id="l00151" name="l00151"></a><span class="lineno"> 151</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_stamping_simplifier.html">StampingSimplifier</a>* stamping_simplifier_;</div>
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<div class="line"><a id="l00152" name="l00152"></a><span class="lineno"> 152</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_blocked_clause_simplifier.html">BlockedClauseSimplifier</a>* blocked_clause_simplifier_;</div>
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<div class="line"><a id="l00153" name="l00153"></a><span class="lineno"> 153</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_bounded_variable_elimination.html">BoundedVariableElimination</a>* bounded_variable_elimination_;</div>
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<div class="line"><a id="l00154" name="l00154"></a><span class="lineno"> 154</span> </div>
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<div class="line"><a id="l00155" name="l00155"></a><span class="lineno"> 155</span> <span class="keywordtype">double</span> total_dtime_ = 0.0;</div>
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<div class="line"><a id="l00156" name="l00156"></a><span class="lineno"> 156</span> </div>
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<div class="line"><a id="l00157" name="l00157"></a><span class="lineno"> 157</span> <span class="comment">// TODO(user): This is only used for calling probing. We should probably</span></div>
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<div class="line"><a id="l00158" name="l00158"></a><span class="lineno"> 158</span> <span class="comment">// create a Probing class to wraps its data. This will also be needed to not</span></div>
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<div class="line"><a id="l00159" name="l00159"></a><span class="lineno"> 159</span> <span class="comment">// always probe the same variables in each round if the deterministic time</span></div>
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<div class="line"><a id="l00160" name="l00160"></a><span class="lineno"> 160</span> <span class="comment">// limit is low.</span></div>
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<div class="line"><a id="l00161" name="l00161"></a><span class="lineno"> 161</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_model.html">Model</a>* model_;</div>
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<div class="line"><a id="l00162" name="l00162"></a><span class="lineno"> 162</span> </div>
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<div class="line"><a id="l00163" name="l00163"></a><span class="lineno"> 163</span> <span class="comment">// Last since clause database was cleaned up.</span></div>
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<div class="line"><a id="l00164" name="l00164"></a><span class="lineno"> 164</span> int64_t last_num_redundant_literals_ = 0;</div>
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<div class="line"><a id="l00165" name="l00165"></a><span class="lineno"> 165</span> int64_t last_num_fixed_variables_ = 0;</div>
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<div class="line"><a id="l00166" name="l00166"></a><span class="lineno"> 166</span>};</div>
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<div class="line"><a id="l00167" name="l00167"></a><span class="lineno"> 167</span> </div>
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<div class="line"><a id="l00168" name="l00168"></a><span class="lineno"> 168</span><span class="comment">// Implements "stamping" as described in "Efficient CNF Simplification based on</span></div>
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<div class="line"><a id="l00169" name="l00169"></a><span class="lineno"> 169</span><span class="comment">// Binary Implication Graphs", Marijn Heule, Matti Jarvisalo and Armin Biere.</span></div>
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<div class="line"><a id="l00170" name="l00170"></a><span class="lineno"> 170</span><span class="comment">//</span></div>
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<div class="line"><a id="l00171" name="l00171"></a><span class="lineno"> 171</span><span class="comment">// This sample the implications graph with a spanning tree, and then simplify</span></div>
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<div class="line"><a id="l00172" name="l00172"></a><span class="lineno"> 172</span><span class="comment">// all clauses (subsumption / strengthening) using the implications encoded in</span></div>
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<div class="line"><a id="l00173" name="l00173"></a><span class="lineno"> 173</span><span class="comment">// this tree. So this allows to consider chain of implications instead of just</span></div>
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<div class="line"><a id="l00174" name="l00174"></a><span class="lineno"> 174</span><span class="comment">// direct ones, but depending on the problem, only a small fraction of the</span></div>
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<div class="line"><a id="l00175" name="l00175"></a><span class="lineno"> 175</span><span class="comment">// implication graph will be captured by the tree.</span></div>
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<div class="line"><a id="l00176" name="l00176"></a><span class="lineno"> 176</span><span class="comment">//</span></div>
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<div class="line"><a id="l00177" name="l00177"></a><span class="lineno"> 177</span><span class="comment">// Note that we randomize the spanning tree at each call. This can benefit by</span></div>
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<div class="line"><a id="l00178" name="l00178"></a><span class="lineno"> 178</span><span class="comment">// having the implication graph be transitively reduced before.</span></div>
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<div class="line"><a id="l00179" name="l00179"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_stamping_simplifier.html"> 179</a></span><span class="keyword">class </span><a class="code hl_class" href="classoperations__research_1_1sat_1_1_stamping_simplifier.html">StampingSimplifier</a> {</div>
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<div class="line"><a id="l00180" name="l00180"></a><span class="lineno"> 180</span> <span class="keyword">public</span>:</div>
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<div class="line"><a id="l00181" name="l00181"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_stamping_simplifier.html#a710f26c66ec7d33613ed9213265e2142"> 181</a></span> <span class="keyword">explicit</span> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_stamping_simplifier.html#a710f26c66ec7d33613ed9213265e2142">StampingSimplifier</a>(<a class="code hl_class" href="classoperations__research_1_1sat_1_1_model.html">Model</a>* <a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>)</div>
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<div class="line"><a id="l00182" name="l00182"></a><span class="lineno"> 182</span> : assignment_(<a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>->GetOrCreate<<a class="code hl_class" href="classoperations__research_1_1sat_1_1_trail.html">Trail</a>>()-><a class="code hl_class" href="classoperations__research_1_1_assignment.html">Assignment</a>()),</div>
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<div class="line"><a id="l00183" name="l00183"></a><span class="lineno"> 183</span> implication_graph_(<a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>->GetOrCreate<<a class="code hl_class" href="classoperations__research_1_1sat_1_1_binary_implication_graph.html">BinaryImplicationGraph</a>>()),</div>
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<div class="line"><a id="l00184" name="l00184"></a><span class="lineno"> 184</span> clause_manager_(<a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>->GetOrCreate<<a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal_watchers.html">LiteralWatchers</a>>()),</div>
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<div class="line"><a id="l00185" name="l00185"></a><span class="lineno"> 185</span> random_(<a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>->GetOrCreate<<a class="code hl_class" href="classoperations__research_1_1sat_1_1_model_random_generator.html">ModelRandomGenerator</a>>()),</div>
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<div class="line"><a id="l00186" name="l00186"></a><span class="lineno"> 186</span> time_limit_(<a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>->GetOrCreate<<a class="code hl_class" href="classoperations__research_1_1_time_limit.html">TimeLimit</a>>()) {}</div>
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<div class="line"><a id="l00187" name="l00187"></a><span class="lineno"> 187</span> </div>
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<div class="line"><a id="l00188" name="l00188"></a><span class="lineno"> 188</span> <span class="comment">// This is "fast" (linear scan + sort of all clauses) so we always complete</span></div>
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<div class="line"><a id="l00189" name="l00189"></a><span class="lineno"> 189</span> <span class="comment">// the full round.</span></div>
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<div class="line"><a id="l00190" name="l00190"></a><span class="lineno"> 190</span> <span class="comment">//</span></div>
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<div class="line"><a id="l00191" name="l00191"></a><span class="lineno"> 191</span> <span class="comment">// TODO(user): To save one scan over all the clauses, we could do the fixed</span></div>
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<div class="line"><a id="l00192" name="l00192"></a><span class="lineno"> 192</span> <span class="comment">// and equivalence variable cleaning here too.</span></div>
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<div class="line"><a id="l00193" name="l00193"></a><span class="lineno"> 193</span> <span class="keywordtype">bool</span> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_stamping_simplifier.html#a1837f97f35b2db520af88985ea7e5666">DoOneRound</a>(<span class="keywordtype">bool</span> log_info);</div>
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<div class="line"><a id="l00194" name="l00194"></a><span class="lineno"> 194</span> </div>
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<div class="line"><a id="l00195" name="l00195"></a><span class="lineno"> 195</span> <span class="comment">// When we compute stamps, we might detect fixed variable (via failed literal</span></div>
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<div class="line"><a id="l00196" name="l00196"></a><span class="lineno"> 196</span> <span class="comment">// probing in the implication graph). So it might make sense to do that until</span></div>
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<div class="line"><a id="l00197" name="l00197"></a><span class="lineno"> 197</span> <span class="comment">// we have dealt with all fixed literals before calling DoOneRound().</span></div>
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<div class="line"><a id="l00198" name="l00198"></a><span class="lineno"> 198</span> <span class="keywordtype">bool</span> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_stamping_simplifier.html#a23f1e3b69e90585b8c746ecb2c829d16">ComputeStampsForNextRound</a>(<span class="keywordtype">bool</span> log_info);</div>
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<div class="line"><a id="l00199" name="l00199"></a><span class="lineno"> 199</span> </div>
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<div class="line"><a id="l00200" name="l00200"></a><span class="lineno"> 200</span> <span class="comment">// Visible for testing.</span></div>
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<div class="line"><a id="l00201" name="l00201"></a><span class="lineno"> 201</span> <span class="keywordtype">void</span> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_stamping_simplifier.html#aaf918948eb5d49c45195671882bbb400">SampleTreeAndFillParent</a>();</div>
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<div class="line"><a id="l00202" name="l00202"></a><span class="lineno"> 202</span> </div>
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<div class="line"><a id="l00203" name="l00203"></a><span class="lineno"> 203</span> <span class="comment">// Using a DFS visiting order, we can answer reachability query in O(1) on a</span></div>
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<div class="line"><a id="l00204" name="l00204"></a><span class="lineno"> 204</span> <span class="comment">// tree, this is well known. ComputeStamps() also detect failed literal in</span></div>
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<div class="line"><a id="l00205" name="l00205"></a><span class="lineno"> 205</span> <span class="comment">// the tree and fix them. It can return false on UNSAT.</span></div>
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<div class="line"><a id="l00206" name="l00206"></a><span class="lineno"> 206</span> <span class="keywordtype">bool</span> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_stamping_simplifier.html#ad23fe7afc319b790417c946b34c5e40b">ComputeStamps</a>();</div>
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<div class="line"><a id="l00207" name="l00207"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_stamping_simplifier.html#a318a00d87baa05fd3e351fa688836de2"> 207</a></span> <span class="keywordtype">bool</span> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_stamping_simplifier.html#a318a00d87baa05fd3e351fa688836de2">ImplicationIsInTree</a>(<a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a> <a class="code hl_variable" href="constraint__solver_2table_8cc.html#acb18315d548212835cd8ed4287e6c0b6">a</a>, <a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a> <a class="code hl_variable" href="constraint__solver_2table_8cc.html#a9293e4d29cac928301645070dd307683">b</a>)<span class="keyword"> const </span>{</div>
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<div class="line"><a id="l00208" name="l00208"></a><span class="lineno"> 208</span> <span class="keywordflow">return</span> first_stamps_[<a class="code hl_variable" href="constraint__solver_2table_8cc.html#acb18315d548212835cd8ed4287e6c0b6">a</a>.Index()] < first_stamps_[<a class="code hl_variable" href="constraint__solver_2table_8cc.html#a9293e4d29cac928301645070dd307683">b</a>.Index()] &&</div>
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<div class="line"><a id="l00209" name="l00209"></a><span class="lineno"> 209</span> last_stamps_[<a class="code hl_variable" href="constraint__solver_2table_8cc.html#a9293e4d29cac928301645070dd307683">b</a>.Index()] < last_stamps_[<a class="code hl_variable" href="constraint__solver_2table_8cc.html#acb18315d548212835cd8ed4287e6c0b6">a</a>.Index()];</div>
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<div class="line"><a id="l00210" name="l00210"></a><span class="lineno"> 210</span> }</div>
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<div class="line"><a id="l00211" name="l00211"></a><span class="lineno"> 211</span> </div>
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<div class="line"><a id="l00212" name="l00212"></a><span class="lineno"> 212</span> <span class="keywordtype">bool</span> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_stamping_simplifier.html#a5ea60f6738dfbc19da6098ea7e706fae">ProcessClauses</a>();</div>
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<div class="line"><a id="l00213" name="l00213"></a><span class="lineno"> 213</span> </div>
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<div class="line"><a id="l00214" name="l00214"></a><span class="lineno"> 214</span> <span class="keyword">private</span>:</div>
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<div class="line"><a id="l00215" name="l00215"></a><span class="lineno"> 215</span> <span class="keyword">const</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_variables_assignment.html">VariablesAssignment</a>& assignment_;</div>
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<div class="line"><a id="l00216" name="l00216"></a><span class="lineno"> 216</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_binary_implication_graph.html">BinaryImplicationGraph</a>* implication_graph_;</div>
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<div class="line"><a id="l00217" name="l00217"></a><span class="lineno"> 217</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal_watchers.html">LiteralWatchers</a>* clause_manager_;</div>
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<div class="line"><a id="l00218" name="l00218"></a><span class="lineno"> 218</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_model_random_generator.html">ModelRandomGenerator</a>* random_;</div>
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<div class="line"><a id="l00219" name="l00219"></a><span class="lineno"> 219</span> <a class="code hl_class" href="classoperations__research_1_1_time_limit.html">TimeLimit</a>* time_limit_;</div>
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<div class="line"><a id="l00220" name="l00220"></a><span class="lineno"> 220</span> </div>
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<div class="line"><a id="l00221" name="l00221"></a><span class="lineno"> 221</span> <span class="comment">// For ComputeStampsForNextRound().</span></div>
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<div class="line"><a id="l00222" name="l00222"></a><span class="lineno"> 222</span> <span class="keywordtype">bool</span> stamps_are_already_computed_ = <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00223" name="l00223"></a><span class="lineno"> 223</span> </div>
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<div class="line"><a id="l00224" name="l00224"></a><span class="lineno"> 224</span> <span class="comment">// Reset at each round.</span></div>
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<div class="line"><a id="l00225" name="l00225"></a><span class="lineno"> 225</span> <span class="keywordtype">double</span> dtime_ = 0.0;</div>
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<div class="line"><a id="l00226" name="l00226"></a><span class="lineno"> 226</span> int64_t num_subsumed_clauses_ = 0;</div>
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<div class="line"><a id="l00227" name="l00227"></a><span class="lineno"> 227</span> int64_t num_removed_literals_ = 0;</div>
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<div class="line"><a id="l00228" name="l00228"></a><span class="lineno"> 228</span> int64_t num_fixed_ = 0;</div>
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<div class="line"><a id="l00229" name="l00229"></a><span class="lineno"> 229</span> </div>
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<div class="line"><a id="l00230" name="l00230"></a><span class="lineno"> 230</span> <span class="comment">// Encode a spanning tree of the implication graph.</span></div>
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<div class="line"><a id="l00231" name="l00231"></a><span class="lineno"> 231</span> <a class="code hl_class" href="classabsl_1_1_strong_vector.html">absl::StrongVector<LiteralIndex, LiteralIndex></a> parents_;</div>
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<div class="line"><a id="l00232" name="l00232"></a><span class="lineno"> 232</span> </div>
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<div class="line"><a id="l00233" name="l00233"></a><span class="lineno"> 233</span> <span class="comment">// Adjacency list representation of the parents_ tree.</span></div>
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<div class="line"><a id="l00234" name="l00234"></a><span class="lineno"> 234</span> <a class="code hl_class" href="classabsl_1_1_strong_vector.html">absl::StrongVector<LiteralIndex, int></a> sizes_;</div>
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<div class="line"><a id="l00235" name="l00235"></a><span class="lineno"> 235</span> <a class="code hl_class" href="classabsl_1_1_strong_vector.html">absl::StrongVector<LiteralIndex, int></a> starts_;</div>
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<div class="line"><a id="l00236" name="l00236"></a><span class="lineno"> 236</span> std::vector<LiteralIndex> children_;</div>
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<div class="line"><a id="l00237" name="l00237"></a><span class="lineno"> 237</span> </div>
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<div class="line"><a id="l00238" name="l00238"></a><span class="lineno"> 238</span> <span class="comment">// Temporary data for the DFS.</span></div>
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<div class="line"><a id="l00239" name="l00239"></a><span class="lineno"> 239</span> <a class="code hl_class" href="classabsl_1_1_strong_vector.html">absl::StrongVector<LiteralIndex, bool></a> marked_;</div>
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<div class="line"><a id="l00240" name="l00240"></a><span class="lineno"> 240</span> std::vector<LiteralIndex> dfs_stack_;</div>
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<div class="line"><a id="l00241" name="l00241"></a><span class="lineno"> 241</span> </div>
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<div class="line"><a id="l00242" name="l00242"></a><span class="lineno"> 242</span> <span class="comment">// First/Last visited index in a DFS of the tree above.</span></div>
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<div class="line"><a id="l00243" name="l00243"></a><span class="lineno"> 243</span> <a class="code hl_class" href="classabsl_1_1_strong_vector.html">absl::StrongVector<LiteralIndex, int></a> first_stamps_;</div>
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<div class="line"><a id="l00244" name="l00244"></a><span class="lineno"> 244</span> <a class="code hl_class" href="classabsl_1_1_strong_vector.html">absl::StrongVector<LiteralIndex, int></a> last_stamps_;</div>
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<div class="line"><a id="l00245" name="l00245"></a><span class="lineno"> 245</span>};</div>
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<div class="line"><a id="l00246" name="l00246"></a><span class="lineno"> 246</span> </div>
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<div class="line"><a id="l00247" name="l00247"></a><span class="lineno"> 247</span><span class="comment">// A clause c is "blocked" by a literal l if all clauses containing the</span></div>
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<div class="line"><a id="l00248" name="l00248"></a><span class="lineno"> 248</span><span class="comment">// negation of l resolve to trivial clause with c. Blocked clause can be</span></div>
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<div class="line"><a id="l00249" name="l00249"></a><span class="lineno"> 249</span><span class="comment">// simply removed from the problem. At postsolve, if a blocked clause is not</span></div>
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<div class="line"><a id="l00250" name="l00250"></a><span class="lineno"> 250</span><span class="comment">// satisfied, then l can simply be set to true without breaking any of the</span></div>
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<div class="line"><a id="l00251" name="l00251"></a><span class="lineno"> 251</span><span class="comment">// clause containing not(l).</span></div>
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<div class="line"><a id="l00252" name="l00252"></a><span class="lineno"> 252</span><span class="comment">//</span></div>
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<div class="line"><a id="l00253" name="l00253"></a><span class="lineno"> 253</span><span class="comment">// See the paper "Blocked Clause Elimination", Matti Jarvisalo, Armin Biere,</span></div>
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<div class="line"><a id="l00254" name="l00254"></a><span class="lineno"> 254</span><span class="comment">// and Marijn Heule.</span></div>
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<div class="line"><a id="l00255" name="l00255"></a><span class="lineno"> 255</span><span class="comment">//</span></div>
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<div class="line"><a id="l00256" name="l00256"></a><span class="lineno"> 256</span><span class="comment">// TODO(user): This requires that l only appear in clauses and not in the</span></div>
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<div class="line"><a id="l00257" name="l00257"></a><span class="lineno"> 257</span><span class="comment">// integer part of CP-SAT.</span></div>
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<div class="line"><a id="l00258" name="l00258"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_blocked_clause_simplifier.html"> 258</a></span><span class="keyword">class </span><a class="code hl_class" href="classoperations__research_1_1sat_1_1_blocked_clause_simplifier.html">BlockedClauseSimplifier</a> {</div>
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<div class="line"><a id="l00259" name="l00259"></a><span class="lineno"> 259</span> <span class="keyword">public</span>:</div>
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<div class="line"><a id="l00260" name="l00260"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_blocked_clause_simplifier.html#a67bfe0553bffbc2cceba7edcddae5baa"> 260</a></span> <span class="keyword">explicit</span> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_blocked_clause_simplifier.html#a67bfe0553bffbc2cceba7edcddae5baa">BlockedClauseSimplifier</a>(<a class="code hl_class" href="classoperations__research_1_1sat_1_1_model.html">Model</a>* <a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>)</div>
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<div class="line"><a id="l00261" name="l00261"></a><span class="lineno"> 261</span> : assignment_(<a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>->GetOrCreate<<a class="code hl_class" href="classoperations__research_1_1sat_1_1_trail.html">Trail</a>>()-><a class="code hl_class" href="classoperations__research_1_1_assignment.html">Assignment</a>()),</div>
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<div class="line"><a id="l00262" name="l00262"></a><span class="lineno"> 262</span> implication_graph_(<a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>->GetOrCreate<<a class="code hl_class" href="classoperations__research_1_1sat_1_1_binary_implication_graph.html">BinaryImplicationGraph</a>>()),</div>
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<div class="line"><a id="l00263" name="l00263"></a><span class="lineno"> 263</span> clause_manager_(<a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>->GetOrCreate<<a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal_watchers.html">LiteralWatchers</a>>()),</div>
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<div class="line"><a id="l00264" name="l00264"></a><span class="lineno"> 264</span> postsolve_(<a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>->GetOrCreate<<a class="code hl_struct" href="structoperations__research_1_1sat_1_1_postsolve_clauses.html">PostsolveClauses</a>>()),</div>
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<div class="line"><a id="l00265" name="l00265"></a><span class="lineno"> 265</span> time_limit_(<a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>->GetOrCreate<<a class="code hl_class" href="classoperations__research_1_1_time_limit.html">TimeLimit</a>>()) {}</div>
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<div class="line"><a id="l00266" name="l00266"></a><span class="lineno"> 266</span> </div>
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<div class="line"><a id="l00267" name="l00267"></a><span class="lineno"> 267</span> <span class="keywordtype">void</span> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_blocked_clause_simplifier.html#ad30a040fd97f2cb710bb44c9f048a341">DoOneRound</a>(<span class="keywordtype">bool</span> log_info);</div>
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<div class="line"><a id="l00268" name="l00268"></a><span class="lineno"> 268</span> </div>
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<div class="line"><a id="l00269" name="l00269"></a><span class="lineno"> 269</span> <span class="keyword">private</span>:</div>
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<div class="line"><a id="l00270" name="l00270"></a><span class="lineno"> 270</span> <span class="keywordtype">void</span> InitializeForNewRound();</div>
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<div class="line"><a id="l00271" name="l00271"></a><span class="lineno"> 271</span> <span class="keywordtype">void</span> ProcessLiteral(<a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a> current_literal);</div>
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<div class="line"><a id="l00272" name="l00272"></a><span class="lineno"> 272</span> <span class="keywordtype">bool</span> ClauseIsBlocked(<a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a> current_literal,</div>
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<div class="line"><a id="l00273" name="l00273"></a><span class="lineno"> 273</span> absl::Span<const Literal> clause);</div>
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<div class="line"><a id="l00274" name="l00274"></a><span class="lineno"> 274</span> </div>
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<div class="line"><a id="l00275" name="l00275"></a><span class="lineno"> 275</span> <span class="keyword">const</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_variables_assignment.html">VariablesAssignment</a>& assignment_;</div>
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<div class="line"><a id="l00276" name="l00276"></a><span class="lineno"> 276</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_binary_implication_graph.html">BinaryImplicationGraph</a>* implication_graph_;</div>
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<div class="line"><a id="l00277" name="l00277"></a><span class="lineno"> 277</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal_watchers.html">LiteralWatchers</a>* clause_manager_;</div>
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<div class="line"><a id="l00278" name="l00278"></a><span class="lineno"> 278</span> <a class="code hl_struct" href="structoperations__research_1_1sat_1_1_postsolve_clauses.html">PostsolveClauses</a>* postsolve_;</div>
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<div class="line"><a id="l00279" name="l00279"></a><span class="lineno"> 279</span> <a class="code hl_class" href="classoperations__research_1_1_time_limit.html">TimeLimit</a>* time_limit_;</div>
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<div class="line"><a id="l00280" name="l00280"></a><span class="lineno"> 280</span> </div>
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<div class="line"><a id="l00281" name="l00281"></a><span class="lineno"> 281</span> <span class="keywordtype">double</span> dtime_ = 0.0;</div>
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<div class="line"><a id="l00282" name="l00282"></a><span class="lineno"> 282</span> int32_t num_blocked_clauses_ = 0;</div>
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<div class="line"><a id="l00283" name="l00283"></a><span class="lineno"> 283</span> int64_t num_inspected_literals_ = 0;</div>
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<div class="line"><a id="l00284" name="l00284"></a><span class="lineno"> 284</span> </div>
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<div class="line"><a id="l00285" name="l00285"></a><span class="lineno"> 285</span> <span class="comment">// Temporary vector to mark literal of a clause.</span></div>
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<div class="line"><a id="l00286" name="l00286"></a><span class="lineno"> 286</span> <a class="code hl_class" href="classabsl_1_1_strong_vector.html">absl::StrongVector<LiteralIndex, bool></a> marked_;</div>
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<div class="line"><a id="l00287" name="l00287"></a><span class="lineno"> 287</span> </div>
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<div class="line"><a id="l00288" name="l00288"></a><span class="lineno"> 288</span> <span class="comment">// List of literal to process.</span></div>
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<div class="line"><a id="l00289" name="l00289"></a><span class="lineno"> 289</span> <span class="comment">// TODO(user): use priority queue?</span></div>
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<div class="line"><a id="l00290" name="l00290"></a><span class="lineno"> 290</span> <a class="code hl_class" href="classabsl_1_1_strong_vector.html">absl::StrongVector<LiteralIndex, bool></a> in_queue_;</div>
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<div class="line"><a id="l00291" name="l00291"></a><span class="lineno"> 291</span> std::deque<Literal> queue_;</div>
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<div class="line"><a id="l00292" name="l00292"></a><span class="lineno"> 292</span> </div>
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<div class="line"><a id="l00293" name="l00293"></a><span class="lineno"> 293</span> <span class="comment">// We compute the occurrence graph just once at the beginning of each round</span></div>
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<div class="line"><a id="l00294" name="l00294"></a><span class="lineno"> 294</span> <span class="comment">// and we do not shrink it as we remove blocked clauses.</span></div>
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<div class="line"><a id="l00295" name="l00295"></a><span class="lineno"> 295</span> DEFINE_STRONG_INDEX_TYPE(rat_literal_clause_index);</div>
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<div class="line"><a id="l00296" name="l00296"></a><span class="lineno"> 296</span> <a class="code hl_class" href="classabsl_1_1_strong_vector.html">absl::StrongVector<ClauseIndex, SatClause*></a> clauses_;</div>
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<div class="line"><a id="l00297" name="l00297"></a><span class="lineno"> 297</span> <a class="code hl_class" href="classabsl_1_1_strong_vector.html">absl::StrongVector<LiteralIndex, std::vector<ClauseIndex></a>></div>
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<div class="line"><a id="l00298" name="l00298"></a><span class="lineno"> 298</span> literal_to_clauses_;</div>
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<div class="line"><a id="l00299" name="l00299"></a><span class="lineno"> 299</span>};</div>
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<div class="line"><a id="l00300" name="l00300"></a><span class="lineno"> 300</span> </div>
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<div class="line"><a id="l00301" name="l00301"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_bounded_variable_elimination.html"> 301</a></span><span class="keyword">class </span><a class="code hl_class" href="classoperations__research_1_1sat_1_1_bounded_variable_elimination.html">BoundedVariableElimination</a> {</div>
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<div class="line"><a id="l00302" name="l00302"></a><span class="lineno"> 302</span> <span class="keyword">public</span>:</div>
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<div class="line"><a id="l00303" name="l00303"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_bounded_variable_elimination.html#ac348cdaab8a33428cedc0b846197dd87"> 303</a></span> <span class="keyword">explicit</span> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_bounded_variable_elimination.html#ac348cdaab8a33428cedc0b846197dd87">BoundedVariableElimination</a>(<a class="code hl_class" href="classoperations__research_1_1sat_1_1_model.html">Model</a>* <a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>)</div>
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<div class="line"><a id="l00304" name="l00304"></a><span class="lineno"> 304</span> : parameters_(*<a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>->GetOrCreate<SatParameters>()),</div>
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<div class="line"><a id="l00305" name="l00305"></a><span class="lineno"> 305</span> assignment_(<a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>->GetOrCreate<<a class="code hl_class" href="classoperations__research_1_1sat_1_1_trail.html">Trail</a>>()-><a class="code hl_class" href="classoperations__research_1_1_assignment.html">Assignment</a>()),</div>
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<div class="line"><a id="l00306" name="l00306"></a><span class="lineno"> 306</span> implication_graph_(<a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>->GetOrCreate<<a class="code hl_class" href="classoperations__research_1_1sat_1_1_binary_implication_graph.html">BinaryImplicationGraph</a>>()),</div>
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<div class="line"><a id="l00307" name="l00307"></a><span class="lineno"> 307</span> clause_manager_(<a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>->GetOrCreate<<a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal_watchers.html">LiteralWatchers</a>>()),</div>
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<div class="line"><a id="l00308" name="l00308"></a><span class="lineno"> 308</span> postsolve_(<a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>->GetOrCreate<<a class="code hl_struct" href="structoperations__research_1_1sat_1_1_postsolve_clauses.html">PostsolveClauses</a>>()),</div>
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<div class="line"><a id="l00309" name="l00309"></a><span class="lineno"> 309</span> trail_(<a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>->GetOrCreate<<a class="code hl_class" href="classoperations__research_1_1sat_1_1_trail.html">Trail</a>>()),</div>
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<div class="line"><a id="l00310" name="l00310"></a><span class="lineno"> 310</span> time_limit_(<a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>->GetOrCreate<<a class="code hl_class" href="classoperations__research_1_1_time_limit.html">TimeLimit</a>>()) {}</div>
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<div class="line"><a id="l00311" name="l00311"></a><span class="lineno"> 311</span> </div>
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<div class="line"><a id="l00312" name="l00312"></a><span class="lineno"> 312</span> <span class="keywordtype">bool</span> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_bounded_variable_elimination.html#a1837f97f35b2db520af88985ea7e5666">DoOneRound</a>(<span class="keywordtype">bool</span> log_info);</div>
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<div class="line"><a id="l00313" name="l00313"></a><span class="lineno"> 313</span> </div>
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<div class="line"><a id="l00314" name="l00314"></a><span class="lineno"> 314</span> <span class="keyword">private</span>:</div>
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<div class="line"><a id="l00315" name="l00315"></a><span class="lineno"> 315</span> <span class="keywordtype">int</span> NumClausesContaining(<a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a> l);</div>
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<div class="line"><a id="l00316" name="l00316"></a><span class="lineno"> 316</span> <span class="keywordtype">void</span> UpdatePriorityQueue(BooleanVariable <a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div>
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<div class="line"><a id="l00317" name="l00317"></a><span class="lineno"> 317</span> <span class="keywordtype">bool</span> CrossProduct(BooleanVariable <a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div>
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<div class="line"><a id="l00318" name="l00318"></a><span class="lineno"> 318</span> <span class="keywordtype">void</span> DeleteClause(<a class="code hl_class" href="classoperations__research_1_1sat_1_1_sat_clause.html">SatClause</a>* sat_clause);</div>
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<div class="line"><a id="l00319" name="l00319"></a><span class="lineno"> 319</span> <span class="keywordtype">void</span> DeleteAllClausesContaining(<a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a> <a class="code hl_variable" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>);</div>
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<div class="line"><a id="l00320" name="l00320"></a><span class="lineno"> 320</span> <span class="keywordtype">void</span> AddClause(absl::Span<const Literal> clause);</div>
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<div class="line"><a id="l00321" name="l00321"></a><span class="lineno"> 321</span> <span class="keywordtype">bool</span> RemoveLiteralFromClause(<a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a> lit, <a class="code hl_class" href="classoperations__research_1_1sat_1_1_sat_clause.html">SatClause</a>* sat_clause);</div>
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<div class="line"><a id="l00322" name="l00322"></a><span class="lineno"> 322</span> <span class="keywordtype">bool</span> Propagate();</div>
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<div class="line"><a id="l00323" name="l00323"></a><span class="lineno"> 323</span> </div>
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<div class="line"><a id="l00324" name="l00324"></a><span class="lineno"> 324</span> <span class="comment">// The actual clause elimination algo. We have two versions, one just compute</span></div>
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<div class="line"><a id="l00325" name="l00325"></a><span class="lineno"> 325</span> <span class="comment">// the "score" of what will be the final state. The other perform the</span></div>
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<div class="line"><a id="l00326" name="l00326"></a><span class="lineno"> 326</span> <span class="comment">// resolution, remove old clauses and add the new ones.</span></div>
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<div class="line"><a id="l00327" name="l00327"></a><span class="lineno"> 327</span> <span class="comment">//</span></div>
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<div class="line"><a id="l00328" name="l00328"></a><span class="lineno"> 328</span> <span class="comment">// Returns false on UNSAT.</span></div>
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<div class="line"><a id="l00329" name="l00329"></a><span class="lineno"> 329</span> <span class="keyword">template</span> <<span class="keywordtype">bool</span> score_only, <span class="keywordtype">bool</span> with_binary_only></div>
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<div class="line"><a id="l00330" name="l00330"></a><span class="lineno"> 330</span> <span class="keywordtype">bool</span> ResolveAllClauseContaining(<a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a> lit);</div>
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<div class="line"><a id="l00331" name="l00331"></a><span class="lineno"> 331</span> </div>
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<div class="line"><a id="l00332" name="l00332"></a><span class="lineno"> 332</span> <span class="keyword">const</span> SatParameters& parameters_;</div>
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<div class="line"><a id="l00333" name="l00333"></a><span class="lineno"> 333</span> <span class="keyword">const</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_variables_assignment.html">VariablesAssignment</a>& assignment_;</div>
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<div class="line"><a id="l00334" name="l00334"></a><span class="lineno"> 334</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_binary_implication_graph.html">BinaryImplicationGraph</a>* implication_graph_;</div>
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<div class="line"><a id="l00335" name="l00335"></a><span class="lineno"> 335</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal_watchers.html">LiteralWatchers</a>* clause_manager_;</div>
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<div class="line"><a id="l00336" name="l00336"></a><span class="lineno"> 336</span> <a class="code hl_struct" href="structoperations__research_1_1sat_1_1_postsolve_clauses.html">PostsolveClauses</a>* postsolve_;</div>
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<div class="line"><a id="l00337" name="l00337"></a><span class="lineno"> 337</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_trail.html">Trail</a>* trail_;</div>
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<div class="line"><a id="l00338" name="l00338"></a><span class="lineno"> 338</span> <a class="code hl_class" href="classoperations__research_1_1_time_limit.html">TimeLimit</a>* time_limit_;</div>
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<div class="line"><a id="l00339" name="l00339"></a><span class="lineno"> 339</span> </div>
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<div class="line"><a id="l00340" name="l00340"></a><span class="lineno"> 340</span> <span class="keywordtype">int</span> propagation_index_;</div>
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<div class="line"><a id="l00341" name="l00341"></a><span class="lineno"> 341</span> </div>
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<div class="line"><a id="l00342" name="l00342"></a><span class="lineno"> 342</span> <span class="keywordtype">double</span> dtime_ = 0.0;</div>
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<div class="line"><a id="l00343" name="l00343"></a><span class="lineno"> 343</span> int64_t num_inspected_literals_ = 0;</div>
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<div class="line"><a id="l00344" name="l00344"></a><span class="lineno"> 344</span> int64_t num_simplifications_ = 0;</div>
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<div class="line"><a id="l00345" name="l00345"></a><span class="lineno"> 345</span> int64_t num_blocked_clauses_ = 0;</div>
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<div class="line"><a id="l00346" name="l00346"></a><span class="lineno"> 346</span> int64_t num_eliminated_variables_ = 0;</div>
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<div class="line"><a id="l00347" name="l00347"></a><span class="lineno"> 347</span> int64_t num_literals_diff_ = 0;</div>
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<div class="line"><a id="l00348" name="l00348"></a><span class="lineno"> 348</span> int64_t num_clauses_diff_ = 0;</div>
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<div class="line"><a id="l00349" name="l00349"></a><span class="lineno"> 349</span> </div>
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<div class="line"><a id="l00350" name="l00350"></a><span class="lineno"> 350</span> int64_t new_score_;</div>
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<div class="line"><a id="l00351" name="l00351"></a><span class="lineno"> 351</span> int64_t score_threshold_;</div>
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<div class="line"><a id="l00352" name="l00352"></a><span class="lineno"> 352</span> </div>
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<div class="line"><a id="l00353" name="l00353"></a><span class="lineno"> 353</span> <span class="comment">// Temporary vector to mark literal of a clause and compute its resolvant.</span></div>
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<div class="line"><a id="l00354" name="l00354"></a><span class="lineno"> 354</span> <a class="code hl_class" href="classabsl_1_1_strong_vector.html">absl::StrongVector<LiteralIndex, bool></a> marked_;</div>
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<div class="line"><a id="l00355" name="l00355"></a><span class="lineno"> 355</span> std::vector<Literal> resolvant_;</div>
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<div class="line"><a id="l00356" name="l00356"></a><span class="lineno"> 356</span> </div>
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<div class="line"><a id="l00357" name="l00357"></a><span class="lineno"> 357</span> <span class="comment">// Priority queue of variable to process.</span></div>
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<div class="line"><a id="l00358" name="l00358"></a><span class="lineno"> 358</span> <span class="comment">// We will process highest priority first.</span></div>
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<div class="line"><a id="l00359" name="l00359"></a><span class="lineno"> 359</span> <span class="keyword">struct </span>VariableWithPriority {</div>
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<div class="line"><a id="l00360" name="l00360"></a><span class="lineno"> 360</span> BooleanVariable <a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>;</div>
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<div class="line"><a id="l00361" name="l00361"></a><span class="lineno"> 361</span> int32_t priority;</div>
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<div class="line"><a id="l00362" name="l00362"></a><span class="lineno"> 362</span> </div>
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<div class="line"><a id="l00363" name="l00363"></a><span class="lineno"> 363</span> <span class="comment">// Interface for the IntegerPriorityQueue.</span></div>
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<div class="line"><a id="l00364" name="l00364"></a><span class="lineno"> 364</span> <span class="keywordtype">int</span> <a class="code hl_typedef" href="namespaceoperations__research_1_1glop.html#ac89c7b45754e9a6bdabc08bea586fc4e">Index</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> <a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>.value(); }</div>
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<div class="line"><a id="l00365" name="l00365"></a><span class="lineno"> 365</span> <span class="keywordtype">bool</span> operator<(<span class="keyword">const</span> VariableWithPriority& o)<span class="keyword"> const </span>{</div>
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<div class="line"><a id="l00366" name="l00366"></a><span class="lineno"> 366</span> <span class="keywordflow">return</span> priority < o.priority;</div>
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<div class="line"><a id="l00367" name="l00367"></a><span class="lineno"> 367</span> }</div>
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<div class="line"><a id="l00368" name="l00368"></a><span class="lineno"> 368</span> };</div>
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<div class="line"><a id="l00369" name="l00369"></a><span class="lineno"> 369</span> IntegerPriorityQueue<VariableWithPriority> queue_;</div>
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<div class="line"><a id="l00370" name="l00370"></a><span class="lineno"> 370</span> </div>
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<div class="line"><a id="l00371" name="l00371"></a><span class="lineno"> 371</span> <span class="comment">// We update the queue_ in batch.</span></div>
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<div class="line"><a id="l00372" name="l00372"></a><span class="lineno"> 372</span> <a class="code hl_class" href="classabsl_1_1_strong_vector.html">absl::StrongVector<BooleanVariable, bool></a> in_need_to_be_updated_;</div>
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<div class="line"><a id="l00373" name="l00373"></a><span class="lineno"> 373</span> std::vector<BooleanVariable> need_to_be_updated_;</div>
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<div class="line"><a id="l00374" name="l00374"></a><span class="lineno"> 374</span> </div>
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<div class="line"><a id="l00375" name="l00375"></a><span class="lineno"> 375</span> <span class="comment">// We compute the occurrence graph just once at the beginning of each round.</span></div>
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<div class="line"><a id="l00376" name="l00376"></a><span class="lineno"> 376</span> <span class="comment">// We maintains the sizes at all time and lazily shrink the graph with deleted</span></div>
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<div class="line"><a id="l00377" name="l00377"></a><span class="lineno"> 377</span> <span class="comment">// clauses.</span></div>
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<div class="line"><a id="l00378" name="l00378"></a><span class="lineno"> 378</span> DEFINE_STRONG_INDEX_TYPE(ClauseIndex);</div>
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<div class="line"><a id="l00379" name="l00379"></a><span class="lineno"> 379</span> <a class="code hl_class" href="classabsl_1_1_strong_vector.html">absl::StrongVector<ClauseIndex, SatClause*></a> clauses_;</div>
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<div class="line"><a id="l00380" name="l00380"></a><span class="lineno"> 380</span> <a class="code hl_class" href="classabsl_1_1_strong_vector.html">absl::StrongVector<LiteralIndex, std::vector<ClauseIndex></a>></div>
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<div class="line"><a id="l00381" name="l00381"></a><span class="lineno"> 381</span> literal_to_clauses_;</div>
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<div class="line"><a id="l00382" name="l00382"></a><span class="lineno"> 382</span> <a class="code hl_class" href="classabsl_1_1_strong_vector.html">absl::StrongVector<LiteralIndex, int></a> literal_to_num_clauses_;</div>
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<div class="line"><a id="l00383" name="l00383"></a><span class="lineno"> 383</span>};</div>
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<div class="line"><a id="l00384" name="l00384"></a><span class="lineno"> 384</span> </div>
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<div class="line"><a id="l00385" name="l00385"></a><span class="lineno"> 385</span>} <span class="comment">// namespace sat</span></div>
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<div class="line"><a id="l00386" name="l00386"></a><span class="lineno"> 386</span>} <span class="comment">// namespace operations_research</span></div>
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<div class="line"><a id="l00387" name="l00387"></a><span class="lineno"> 387</span> </div>
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<div class="line"><a id="l00388" name="l00388"></a><span class="lineno"> 388</span><span class="preprocessor">#endif </span><span class="comment">// OR_TOOLS_SAT_SAT_INPROCESSING_H_</span></div>
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<div class="ttc" id="aclassabsl_1_1_strong_vector_html"><div class="ttname"><a href="classabsl_1_1_strong_vector.html">absl::StrongVector< LiteralIndex, LiteralIndex ></a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_assignment_html"><div class="ttname"><a href="classoperations__research_1_1_assignment.html">operations_research::Assignment</a></div><div class="ttdoc">An Assignment is a variable -> domains mapping, used to report solutions to the user.</div><div class="ttdef"><b>Definition:</b> <a href="constraint__solver_8h_source.html#l05081">constraint_solver.h:5081</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_time_limit_html"><div class="ttname"><a href="classoperations__research_1_1_time_limit.html">operations_research::TimeLimit</a></div><div class="ttdoc">A simple class to enforce both an elapsed time limit and a deterministic time limit in the same threa...</div><div class="ttdef"><b>Definition:</b> <a href="time__limit_8h_source.html#l00106">time_limit.h:106</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_binary_implication_graph_html"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_binary_implication_graph.html">operations_research::sat::BinaryImplicationGraph</a></div><div class="ttdef"><b>Definition:</b> <a href="clause_8h_source.html#l00457">clause.h:457</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_blocked_clause_simplifier_html"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_blocked_clause_simplifier.html">operations_research::sat::BlockedClauseSimplifier</a></div><div class="ttdef"><b>Definition:</b> <a href="sat__inprocessing_8h_source.html#l00258">sat_inprocessing.h:258</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_blocked_clause_simplifier_html_a67bfe0553bffbc2cceba7edcddae5baa"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_blocked_clause_simplifier.html#a67bfe0553bffbc2cceba7edcddae5baa">operations_research::sat::BlockedClauseSimplifier::BlockedClauseSimplifier</a></div><div class="ttdeci">BlockedClauseSimplifier(Model *model)</div><div class="ttdef"><b>Definition:</b> <a href="sat__inprocessing_8h_source.html#l00260">sat_inprocessing.h:260</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_blocked_clause_simplifier_html_ad30a040fd97f2cb710bb44c9f048a341"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_blocked_clause_simplifier.html#ad30a040fd97f2cb710bb44c9f048a341">operations_research::sat::BlockedClauseSimplifier::DoOneRound</a></div><div class="ttdeci">void DoOneRound(bool log_info)</div><div class="ttdef"><b>Definition:</b> <a href="sat__inprocessing_8cc_source.html#l00909">sat_inprocessing.cc:909</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_bounded_variable_elimination_html"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_bounded_variable_elimination.html">operations_research::sat::BoundedVariableElimination</a></div><div class="ttdef"><b>Definition:</b> <a href="sat__inprocessing_8h_source.html#l00301">sat_inprocessing.h:301</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_bounded_variable_elimination_html_a1837f97f35b2db520af88985ea7e5666"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_bounded_variable_elimination.html#a1837f97f35b2db520af88985ea7e5666">operations_research::sat::BoundedVariableElimination::DoOneRound</a></div><div class="ttdeci">bool DoOneRound(bool log_info)</div><div class="ttdef"><b>Definition:</b> <a href="sat__inprocessing_8cc_source.html#l01094">sat_inprocessing.cc:1094</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_bounded_variable_elimination_html_ac348cdaab8a33428cedc0b846197dd87"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_bounded_variable_elimination.html#ac348cdaab8a33428cedc0b846197dd87">operations_research::sat::BoundedVariableElimination::BoundedVariableElimination</a></div><div class="ttdeci">BoundedVariableElimination(Model *model)</div><div class="ttdef"><b>Definition:</b> <a href="sat__inprocessing_8h_source.html#l00303">sat_inprocessing.h:303</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_inprocessing_html"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_inprocessing.html">operations_research::sat::Inprocessing</a></div><div class="ttdef"><b>Definition:</b> <a href="sat__inprocessing_8h_source.html#l00096">sat_inprocessing.h:96</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_inprocessing_html_a2e5437cb35da63545f954a80536023e0"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_inprocessing.html#a2e5437cb35da63545f954a80536023e0">operations_research::sat::Inprocessing::InprocessingRound</a></div><div class="ttdeci">bool InprocessingRound()</div><div class="ttdef"><b>Definition:</b> <a href="sat__inprocessing_8cc_source.html#l00158">sat_inprocessing.cc:158</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_inprocessing_html_a33abe26c0696a328c36dd0aa9f0b0f00"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_inprocessing.html#a33abe26c0696a328c36dd0aa9f0b0f00">operations_research::sat::Inprocessing::PresolveLoop</a></div><div class="ttdeci">bool PresolveLoop(SatPresolveOptions options)</div><div class="ttdef"><b>Definition:</b> <a href="sat__inprocessing_8cc_source.html#l00063">sat_inprocessing.cc:63</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_inprocessing_html_a55d41aea8582d314b14874b133eb8bcb"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_inprocessing.html#a55d41aea8582d314b14874b133eb8bcb">operations_research::sat::Inprocessing::MoreFixedVariableToClean</a></div><div class="ttdeci">bool MoreFixedVariableToClean() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__inprocessing_8cc_source.html#l00229">sat_inprocessing.cc:229</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_inprocessing_html_a5641f2b95c6ba972fff06ddd6ff5e29b"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_inprocessing.html#a5641f2b95c6ba972fff06ddd6ff5e29b">operations_research::sat::Inprocessing::RemoveFixedAndEquivalentVariables</a></div><div class="ttdeci">bool RemoveFixedAndEquivalentVariables(bool log_info)</div><div class="ttdef"><b>Definition:</b> <a href="sat__inprocessing_8cc_source.html#l00270">sat_inprocessing.cc:270</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_inprocessing_html_a7fefd67efe60192540adcc4bdea29836"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_inprocessing.html#a7fefd67efe60192540adcc4bdea29836">operations_research::sat::Inprocessing::LevelZeroPropagate</a></div><div class="ttdeci">bool LevelZeroPropagate()</div><div class="ttdef"><b>Definition:</b> <a href="sat__inprocessing_8cc_source.html#l00240">sat_inprocessing.cc:240</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_inprocessing_html_ad24fc03309c423341f1aed176b070cd0"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_inprocessing.html#ad24fc03309c423341f1aed176b070cd0">operations_research::sat::Inprocessing::Inprocessing</a></div><div class="ttdeci">Inprocessing(Model *model)</div><div class="ttdef"><b>Definition:</b> <a href="sat__inprocessing_8h_source.html#l00098">sat_inprocessing.h:98</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_inprocessing_html_ae07d2afcdeb4149564918774bb584c17"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_inprocessing.html#ae07d2afcdeb4149564918774bb584c17">operations_research::sat::Inprocessing::MoreRedundantVariableToClean</a></div><div class="ttdeci">bool MoreRedundantVariableToClean() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__inprocessing_8cc_source.html#l00234">sat_inprocessing.cc:234</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_inprocessing_html_aeb638f5ec6c2dd765d96e06926c4143f"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_inprocessing.html#aeb638f5ec6c2dd765d96e06926c4143f">operations_research::sat::Inprocessing::SubsumeAndStrenghtenRound</a></div><div class="ttdeci">bool SubsumeAndStrenghtenRound(bool log_info)</div><div class="ttdef"><b>Definition:</b> <a href="sat__inprocessing_8cc_source.html#l00379">sat_inprocessing.cc:379</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_inprocessing_html_af933a36985c24ffed84da1ac4f159e43"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_inprocessing.html#af933a36985c24ffed84da1ac4f159e43">operations_research::sat::Inprocessing::DetectEquivalencesAndStamp</a></div><div class="ttdeci">bool DetectEquivalencesAndStamp(bool use_transitive_reduction, bool log_info)</div><div class="ttdef"><b>Definition:</b> <a href="sat__inprocessing_8cc_source.html#l00248">sat_inprocessing.cc:248</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_literal_html"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_literal.html">operations_research::sat::Literal</a></div><div class="ttdef"><b>Definition:</b> <a href="sat__base_8h_source.html#l00067">sat_base.h:67</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_literal_watchers_html"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_literal_watchers.html">operations_research::sat::LiteralWatchers</a></div><div class="ttdef"><b>Definition:</b> <a href="clause_8h_source.html#l00163">clause.h:163</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_model_html"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_model.html">operations_research::sat::Model</a></div><div class="ttdoc">Class that owns everything related to a particular optimization model.</div><div class="ttdef"><b>Definition:</b> <a href="sat_2model_8h_source.html#l00042">sat/model.h:42</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_model_random_generator_html"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_model_random_generator.html">operations_research::sat::ModelRandomGenerator</a></div><div class="ttdef"><b>Definition:</b> <a href="sat_2util_8h_source.html#l00115">sat/util.h:115</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_sat_clause_html"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_clause.html">operations_research::sat::SatClause</a></div><div class="ttdef"><b>Definition:</b> <a href="clause_8h_source.html#l00054">clause.h:54</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_sat_decision_policy_html"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_decision_policy.html">operations_research::sat::SatDecisionPolicy</a></div><div class="ttdef"><b>Definition:</b> <a href="sat__decision_8h_source.html#l00036">sat_decision.h:36</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_sat_solver_html"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_solver.html">operations_research::sat::SatSolver</a></div><div class="ttdef"><b>Definition:</b> <a href="sat__solver_8h_source.html#l00061">sat_solver.h:61</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_stamping_simplifier_html"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_stamping_simplifier.html">operations_research::sat::StampingSimplifier</a></div><div class="ttdef"><b>Definition:</b> <a href="sat__inprocessing_8h_source.html#l00179">sat_inprocessing.h:179</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_stamping_simplifier_html_a1837f97f35b2db520af88985ea7e5666"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_stamping_simplifier.html#a1837f97f35b2db520af88985ea7e5666">operations_research::sat::StampingSimplifier::DoOneRound</a></div><div class="ttdeci">bool DoOneRound(bool log_info)</div><div class="ttdef"><b>Definition:</b> <a href="sat__inprocessing_8cc_source.html#l00594">sat_inprocessing.cc:594</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_stamping_simplifier_html_a23f1e3b69e90585b8c746ecb2c829d16"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_stamping_simplifier.html#a23f1e3b69e90585b8c746ecb2c829d16">operations_research::sat::StampingSimplifier::ComputeStampsForNextRound</a></div><div class="ttdeci">bool ComputeStampsForNextRound(bool log_info)</div><div class="ttdef"><b>Definition:</b> <a href="sat__inprocessing_8cc_source.html#l00630">sat_inprocessing.cc:630</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_stamping_simplifier_html_a318a00d87baa05fd3e351fa688836de2"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_stamping_simplifier.html#a318a00d87baa05fd3e351fa688836de2">operations_research::sat::StampingSimplifier::ImplicationIsInTree</a></div><div class="ttdeci">bool ImplicationIsInTree(Literal a, Literal b) const</div><div class="ttdef"><b>Definition:</b> <a href="sat__inprocessing_8h_source.html#l00207">sat_inprocessing.h:207</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_stamping_simplifier_html_a5ea60f6738dfbc19da6098ea7e706fae"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_stamping_simplifier.html#a5ea60f6738dfbc19da6098ea7e706fae">operations_research::sat::StampingSimplifier::ProcessClauses</a></div><div class="ttdeci">bool ProcessClauses()</div><div class="ttdef"><b>Definition:</b> <a href="sat__inprocessing_8cc_source.html#l00774">sat_inprocessing.cc:774</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_stamping_simplifier_html_a710f26c66ec7d33613ed9213265e2142"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_stamping_simplifier.html#a710f26c66ec7d33613ed9213265e2142">operations_research::sat::StampingSimplifier::StampingSimplifier</a></div><div class="ttdeci">StampingSimplifier(Model *model)</div><div class="ttdef"><b>Definition:</b> <a href="sat__inprocessing_8h_source.html#l00181">sat_inprocessing.h:181</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_stamping_simplifier_html_aaf918948eb5d49c45195671882bbb400"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_stamping_simplifier.html#aaf918948eb5d49c45195671882bbb400">operations_research::sat::StampingSimplifier::SampleTreeAndFillParent</a></div><div class="ttdeci">void SampleTreeAndFillParent()</div><div class="ttdef"><b>Definition:</b> <a href="sat__inprocessing_8cc_source.html#l00654">sat_inprocessing.cc:654</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_stamping_simplifier_html_ad23fe7afc319b790417c946b34c5e40b"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_stamping_simplifier.html#ad23fe7afc319b790417c946b34c5e40b">operations_research::sat::StampingSimplifier::ComputeStamps</a></div><div class="ttdeci">bool ComputeStamps()</div><div class="ttdef"><b>Definition:</b> <a href="sat__inprocessing_8cc_source.html#l00689">sat_inprocessing.cc:689</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_trail_html"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_trail.html">operations_research::sat::Trail</a></div><div class="ttdef"><b>Definition:</b> <a href="sat__base_8h_source.html#l00236">sat_base.h:236</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_variables_assignment_html"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_variables_assignment.html">operations_research::sat::VariablesAssignment</a></div><div class="ttdef"><b>Definition:</b> <a href="sat__base_8h_source.html#l00125">sat_base.h:125</a></div></div>
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<div class="ttc" id="aclause_8h_html"><div class="ttname"><a href="clause_8h.html">clause.h</a></div></div>
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<div class="ttc" id="aconstraint__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="aconstraint__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="adrat__checker_8h_html"><div class="ttname"><a href="drat__checker_8h.html">drat_checker.h</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_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#l00274">gurobi_interface.cc:274</a></div></div>
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<div class="ttc" id="ainteger__pq_8h_html"><div class="ttname"><a href="integer__pq_8h.html">integer_pq.h</a></div></div>
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<div class="ttc" id="anamespaceoperations__research_1_1glop_html_ac89c7b45754e9a6bdabc08bea586fc4e"><div class="ttname"><a href="namespaceoperations__research_1_1glop.html#ac89c7b45754e9a6bdabc08bea586fc4e">operations_research::glop::Index</a></div><div class="ttdeci">int32_t Index</div><div class="ttdef"><b>Definition:</b> <a href="lp__types_8h_source.html#l00038">lp_types.h:38</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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<div class="ttc" id="aoptimization_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#l00089">optimization.cc:89</a></div></div>
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<div class="ttc" id="asat_2model_8h_html"><div class="ttname"><a href="sat_2model_8h.html">model.h</a></div></div>
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<div class="ttc" id="asat_2util_8h_html"><div class="ttname"><a href="sat_2util_8h.html">util.h</a></div></div>
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<div class="ttc" id="asat__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="asat__decision_8h_html"><div class="ttname"><a href="sat__decision_8h.html">sat_decision.h</a></div></div>
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<div class="ttc" id="asat__solver_8h_html"><div class="ttname"><a href="sat__solver_8h.html">sat_solver.h</a></div></div>
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<div class="ttc" id="astrong__integers_8h_html"><div class="ttname"><a href="strong__integers_8h.html">strong_integers.h</a></div></div>
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<div class="ttc" id="astrong__vector_8h_html"><div class="ttname"><a href="strong__vector_8h.html">strong_vector.h</a></div></div>
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<div class="ttc" id="astructoperations__research_1_1sat_1_1_postsolve_clauses_html"><div class="ttname"><a href="structoperations__research_1_1sat_1_1_postsolve_clauses.html">operations_research::sat::PostsolveClauses</a></div><div class="ttdef"><b>Definition:</b> <a href="sat__inprocessing_8h_source.html#l00050">sat_inprocessing.h:50</a></div></div>
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<div class="ttc" id="astructoperations__research_1_1sat_1_1_postsolve_clauses_html_a8cc6d9f1059f26a873442045a72e651e"><div class="ttname"><a href="structoperations__research_1_1sat_1_1_postsolve_clauses.html#a8cc6d9f1059f26a873442045a72e651e">operations_research::sat::PostsolveClauses::clauses</a></div><div class="ttdeci">std::deque< std::vector< Literal > > clauses</div><div class="ttdef"><b>Definition:</b> <a href="sat__inprocessing_8h_source.html#l00056">sat_inprocessing.h:56</a></div></div>
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<div class="ttc" id="astructoperations__research_1_1sat_1_1_postsolve_clauses_html_ae70f41a3895b08dd35056d97eec1800e"><div class="ttname"><a href="structoperations__research_1_1sat_1_1_postsolve_clauses.html#ae70f41a3895b08dd35056d97eec1800e">operations_research::sat::PostsolveClauses::AddClauseWithSpecialLiteral</a></div><div class="ttdeci">void AddClauseWithSpecialLiteral(Literal literal, absl::Span< const Literal > clause)</div><div class="ttdef"><b>Definition:</b> <a href="sat__inprocessing_8cc_source.html#l00046">sat_inprocessing.cc:46</a></div></div>
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<div class="ttc" id="astructoperations__research_1_1sat_1_1_sat_presolve_options_html"><div class="ttname"><a href="structoperations__research_1_1sat_1_1_sat_presolve_options.html">operations_research::sat::SatPresolveOptions</a></div><div class="ttdef"><b>Definition:</b> <a href="sat__inprocessing_8h_source.html#l00063">sat_inprocessing.h:63</a></div></div>
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<div class="ttc" id="astructoperations__research_1_1sat_1_1_sat_presolve_options_html_a54320231778412ca00e50eb821c95aa6"><div class="ttname"><a href="structoperations__research_1_1sat_1_1_sat_presolve_options.html#a54320231778412ca00e50eb821c95aa6">operations_research::sat::SatPresolveOptions::log_info</a></div><div class="ttdeci">bool log_info</div><div class="ttdef"><b>Definition:</b> <a href="sat__inprocessing_8h_source.html#l00069">sat_inprocessing.h:69</a></div></div>
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<div class="ttc" id="astructoperations__research_1_1sat_1_1_sat_presolve_options_html_a9251c24a19aaef6f5134a615eff02277"><div class="ttname"><a href="structoperations__research_1_1sat_1_1_sat_presolve_options.html#a9251c24a19aaef6f5134a615eff02277">operations_research::sat::SatPresolveOptions::use_transitive_reduction</a></div><div class="ttdeci">bool use_transitive_reduction</div><div class="ttdef"><b>Definition:</b> <a href="sat__inprocessing_8h_source.html#l00080">sat_inprocessing.h:80</a></div></div>
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<div class="ttc" id="astructoperations__research_1_1sat_1_1_sat_presolve_options_html_ac68dd5a27fd973b215de47442bacf1ac"><div class="ttname"><a href="structoperations__research_1_1sat_1_1_sat_presolve_options.html#ac68dd5a27fd973b215de47442bacf1ac">operations_research::sat::SatPresolveOptions::extract_binary_clauses_in_probing</a></div><div class="ttdeci">bool extract_binary_clauses_in_probing</div><div class="ttdef"><b>Definition:</b> <a href="sat__inprocessing_8h_source.html#l00072">sat_inprocessing.h:72</a></div></div>
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