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<div class="headertitle"><div class="title">sat_decision.cc</div></div>
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<a href="sat__decision_8cc.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="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="l00015" name="l00015"></a><span class="lineno"> 15</span> </div>
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<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span><span class="preprocessor">#include <cstdint></span></div>
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<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span> </div>
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<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</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="l00019" name="l00019"></a><span class="lineno"> 19</span> </div>
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<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</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="l00021" name="l00021"></a><span class="lineno"> 21</span><span class="keyword">namespace </span>sat {</div>
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<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span> </div>
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<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#af3bcc41cd4c20ff0a694cbfd18cb0e1e"> 23</a></span><a class="code hl_function" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#af3bcc41cd4c20ff0a694cbfd18cb0e1e">SatDecisionPolicy::SatDecisionPolicy</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="l00024" name="l00024"></a><span class="lineno"> 24</span> : parameters_(*(<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_parameters.html">SatParameters</a>>())),</div>
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<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</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="l00026" name="l00026"></a><span class="lineno"> 26</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="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"><a class="line" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#a19614231a107b165113595bf8edf60bf"> 28</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#a19614231a107b165113595bf8edf60bf">SatDecisionPolicy::IncreaseNumVariables</a>(<span class="keywordtype">int</span> num_variables) {</div>
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<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span> <span class="keyword">const</span> <span class="keywordtype">int</span> old_num_variables = activities_.size();</div>
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<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span> <a class="code hl_define" href="base_2logging_8h.html#aae2dc65d9ea248d54bf39daa986dd295">DCHECK_GE</a>(num_variables, activities_.size());</div>
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<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span> </div>
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<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span> activities_.resize(num_variables, parameters_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_sat_parameters.html#acabedd7725b642e1e6a45cd189f7345a">initial_variables_activity</a>());</div>
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<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span> tie_breakers_.resize(num_variables, 0.0);</div>
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<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> num_bumps_.resize(num_variables, 0);</div>
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<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span> pq_need_update_for_var_at_trail_index_.<a class="code hl_function" href="classoperations__research_1_1_bit_queue64.html#a2c9e03b5ffa844d119c926de4689ce59">IncreaseSize</a>(num_variables);</div>
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<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span> </div>
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<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span> weighted_sign_.resize(num_variables, 0.0);</div>
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<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span> </div>
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<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> has_forced_polarity_.resize(num_variables, <span class="keyword">false</span>);</div>
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<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> forced_polarity_.resize(num_variables);</div>
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<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> has_target_polarity_.resize(num_variables, <span class="keyword">false</span>);</div>
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<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span> target_polarity_.resize(num_variables);</div>
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<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> var_polarity_.resize(num_variables);</div>
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<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> </div>
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<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> ResetInitialPolarity(<span class="comment">/*from=*/</span>old_num_variables);</div>
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<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> </div>
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<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> <span class="comment">// Update the priority queue. Note that each addition is in O(1) because</span></div>
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<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> <span class="comment">// the priority is 0.0.</span></div>
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<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> var_ordering_.Reserve(num_variables);</div>
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<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> <span class="keywordflow">if</span> (var_ordering_is_initialized_) {</div>
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<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> <span class="keywordflow">for</span> (BooleanVariable <a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>(old_num_variables); <a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> < num_variables; ++<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) {</div>
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<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> var_ordering_.Add({<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>, 0.0, activities_[<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>]});</div>
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<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> }</div>
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<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> }</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"> 56</span> </div>
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<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#abe906f3b347e87b5e91e7ab5609b0f36"> 57</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#abe906f3b347e87b5e91e7ab5609b0f36">SatDecisionPolicy::BeforeConflict</a>(<span class="keywordtype">int</span> trail_index) {</div>
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<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> <span class="keywordflow">if</span> (parameters_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_sat_parameters.html#a22906e07897f0c712b4710d8716b8dc1">use_erwa_heuristic</a>()) {</div>
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<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> ++num_conflicts_;</div>
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<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> num_conflicts_stack_.push_back({trail_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_trail.html#a8ef12397d1682615bc3108c397734179">Index</a>(), 1});</div>
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<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> }</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"> 63</span> <span class="keywordflow">if</span> (trail_index > target_length_) {</div>
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<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> target_length_ = trail_index;</div>
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<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> has_target_polarity_.assign(has_target_polarity_.size(), <span class="keyword">false</span>);</div>
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<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < trail_index; ++i) {</div>
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<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> <span class="keyword">const</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a> l = trail_[i];</div>
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<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> has_target_polarity_[l.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_literal.html#a6a5dcff82096cd7a7147bf996dbaa5a8">Variable</a>()] = <span class="keyword">true</span>;</div>
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<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> target_polarity_[l.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_literal.html#a6a5dcff82096cd7a7147bf996dbaa5a8">Variable</a>()] = l.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_literal.html#ab76ca9049d6f3f1948d7120a98765107">IsPositive</a>();</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> }</div>
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<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> </div>
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<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> <span class="keywordflow">if</span> (trail_index > best_partial_assignment_.size()) {</div>
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<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> best_partial_assignment_.assign(&trail_[0], &trail_[trail_index]);</div>
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<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span> }</div>
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<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> </div>
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<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> --num_conflicts_until_rephase_;</div>
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<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> RephaseIfNeeded();</div>
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<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span>}</div>
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<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span> </div>
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<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span><span class="keywordtype">void</span> SatDecisionPolicy::RephaseIfNeeded() {</div>
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<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span> <span class="keywordflow">if</span> (parameters_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_sat_parameters.html#a93f25af8b4b4d05251e0c8022e89cc5f">polarity_rephase_increment</a>() <= 0) <span class="keywordflow">return</span>;</div>
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<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> <span class="keywordflow">if</span> (num_conflicts_until_rephase_ > 0) <span class="keywordflow">return</span>;</div>
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<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span> </div>
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<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span> <a class="code hl_define" href="base_2logging_8h.html#afcaa7cadd41741bb855c2ada1d2ef927">VLOG</a>(1) << <span class="stringliteral">"End of polarity phase "</span> << polarity_phase_</div>
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<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span> << <span class="stringliteral">" target_length: "</span> << target_length_</div>
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<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span> << <span class="stringliteral">" best_length: "</span> << best_partial_assignment_.size();</div>
|
|
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span> </div>
|
|
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"> 89</span> ++polarity_phase_;</div>
|
|
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span> num_conflicts_until_rephase_ =</div>
|
|
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno"> 91</span> parameters_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_sat_parameters.html#a93f25af8b4b4d05251e0c8022e89cc5f">polarity_rephase_increment</a>() * (polarity_phase_ + 1);</div>
|
|
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno"> 92</span> </div>
|
|
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"> 93</span> <span class="comment">// We always reset the target each time we change phase.</span></div>
|
|
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno"> 94</span> target_length_ = 0;</div>
|
|
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno"> 95</span> has_target_polarity_.assign(has_target_polarity_.size(), <span class="keyword">false</span>);</div>
|
|
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno"> 96</span> </div>
|
|
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno"> 97</span> <span class="comment">// Cycle between different initial polarities. Note that we already start by</span></div>
|
|
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"> 98</span> <span class="comment">// the default polarity, and this code is reached the first time with a</span></div>
|
|
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno"> 99</span> <span class="comment">// polarity_phase_ of 1.</span></div>
|
|
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno"> 100</span> <span class="keywordflow">switch</span> (polarity_phase_ % 8) {</div>
|
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<div class="line"><a id="l00101" name="l00101"></a><span class="lineno"> 101</span> <span class="keywordflow">case</span> 0:</div>
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|
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"> 102</span> ResetInitialPolarity(<span class="comment">/*from=*/</span>0);</div>
|
|
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"> 103</span> <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno"> 104</span> <span class="keywordflow">case</span> 1:</div>
|
|
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno"> 105</span> UseLongestAssignmentAsInitialPolarity();</div>
|
|
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno"> 106</span> <span class="keywordflow">break</span>;</div>
|
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<div class="line"><a id="l00107" name="l00107"></a><span class="lineno"> 107</span> <span class="keywordflow">case</span> 2:</div>
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|
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno"> 108</span> ResetInitialPolarity(<span class="comment">/*from=*/</span>0, <span class="comment">/*inverted=*/</span><span class="keyword">true</span>);</div>
|
|
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno"> 109</span> <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno"> 110</span> <span class="keywordflow">case</span> 3:</div>
|
|
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno"> 111</span> UseLongestAssignmentAsInitialPolarity();</div>
|
|
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno"> 112</span> <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno"> 113</span> <span class="keywordflow">case</span> 4:</div>
|
|
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno"> 114</span> RandomizeCurrentPolarity();</div>
|
|
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno"> 115</span> <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno"> 116</span> <span class="keywordflow">case</span> 5:</div>
|
|
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno"> 117</span> UseLongestAssignmentAsInitialPolarity();</div>
|
|
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno"> 118</span> <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno"> 119</span> <span class="keywordflow">case</span> 6:</div>
|
|
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno"> 120</span> FlipCurrentPolarity();</div>
|
|
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno"> 121</span> <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno"> 122</span> <span class="keywordflow">case</span> 7:</div>
|
|
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno"> 123</span> UseLongestAssignmentAsInitialPolarity();</div>
|
|
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno"> 124</span> <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno"> 125</span> }</div>
|
|
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno"> 126</span>}</div>
|
|
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno"> 127</span> </div>
|
|
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#a1dc177ee88f0a7ce2e46a032e5c3cf02"> 128</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#a1dc177ee88f0a7ce2e46a032e5c3cf02">SatDecisionPolicy::ResetDecisionHeuristic</a>() {</div>
|
|
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno"> 129</span> <span class="keyword">const</span> <span class="keywordtype">int</span> num_variables = activities_.size();</div>
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|
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno"> 130</span> variable_activity_increment_ = 1.0;</div>
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|
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno"> 131</span> activities_.assign(num_variables, parameters_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_sat_parameters.html#acabedd7725b642e1e6a45cd189f7345a">initial_variables_activity</a>());</div>
|
|
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno"> 132</span> tie_breakers_.assign(num_variables, 0.0);</div>
|
|
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno"> 133</span> num_bumps_.assign(num_variables, 0);</div>
|
|
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno"> 134</span> var_ordering_.Clear();</div>
|
|
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno"> 135</span> </div>
|
|
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno"> 136</span> polarity_phase_ = 0;</div>
|
|
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno"> 137</span> num_conflicts_until_rephase_ = parameters_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_sat_parameters.html#a93f25af8b4b4d05251e0c8022e89cc5f">polarity_rephase_increment</a>();</div>
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|
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno"> 138</span> </div>
|
|
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno"> 139</span> ResetInitialPolarity(<span class="comment">/*from=*/</span>0);</div>
|
|
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno"> 140</span> has_target_polarity_.assign(num_variables, <span class="keyword">false</span>);</div>
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|
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno"> 141</span> has_forced_polarity_.assign(num_variables, <span class="keyword">false</span>);</div>
|
|
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno"> 142</span> best_partial_assignment_.clear();</div>
|
|
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno"> 143</span> </div>
|
|
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno"> 144</span> num_conflicts_ = 0;</div>
|
|
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno"> 145</span> num_conflicts_stack_.clear();</div>
|
|
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno"> 146</span> </div>
|
|
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno"> 147</span> var_ordering_is_initialized_ = <span class="keyword">false</span>;</div>
|
|
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno"> 148</span>}</div>
|
|
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno"> 149</span> </div>
|
|
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno"> 150</span><span class="keywordtype">void</span> SatDecisionPolicy::ResetInitialPolarity(<span class="keywordtype">int</span> from, <span class="keywordtype">bool</span> inverted) {</div>
|
|
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno"> 151</span> <span class="comment">// Sets the initial polarity.</span></div>
|
|
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno"> 152</span> <span class="comment">//</span></div>
|
|
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno"> 153</span> <span class="comment">// TODO(user): The WEIGHTED_SIGN one are currently slightly broken because the</span></div>
|
|
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno"> 154</span> <span class="comment">// weighted_sign_ is updated after this has been called. It requires a call</span></div>
|
|
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno"> 155</span> <span class="comment">// to ResetDecisionHeuristic() after all the constraint have been added. Fix.</span></div>
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|
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno"> 156</span> <span class="comment">// On another hand, this is only used with SolveWithRandomParameters() that</span></div>
|
|
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno"> 157</span> <span class="comment">// does call this function.</span></div>
|
|
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno"> 158</span> <span class="keyword">const</span> <span class="keywordtype">int</span> num_variables = activities_.size();</div>
|
|
<div class="line"><a id="l00159" name="l00159"></a><span class="lineno"> 159</span> <span class="keywordflow">for</span> (BooleanVariable <a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>(from); <a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> < num_variables; ++<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) {</div>
|
|
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno"> 160</span> <span class="keywordflow">switch</span> (parameters_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_sat_parameters.html#acdf9e882380c9dc5181445d12ef0e455">initial_polarity</a>()) {</div>
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|
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno"> 161</span> <span class="keywordflow">case</span> <a class="code hl_variable" href="classoperations__research_1_1sat_1_1_sat_parameters.html#a222e319d48fb95a500e0cd87721dabbb">SatParameters::POLARITY_TRUE</a>:</div>
|
|
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno"> 162</span> var_polarity_[<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>] = inverted ? false : <span class="keyword">true</span>;</div>
|
|
<div class="line"><a id="l00163" name="l00163"></a><span class="lineno"> 163</span> <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a id="l00164" name="l00164"></a><span class="lineno"> 164</span> <span class="keywordflow">case</span> <a class="code hl_variable" href="classoperations__research_1_1sat_1_1_sat_parameters.html#a0373caf3798876819f17810804214df0">SatParameters::POLARITY_FALSE</a>:</div>
|
|
<div class="line"><a id="l00165" name="l00165"></a><span class="lineno"> 165</span> var_polarity_[<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>] = inverted ? true : <span class="keyword">false</span>;</div>
|
|
<div class="line"><a id="l00166" name="l00166"></a><span class="lineno"> 166</span> <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a id="l00167" name="l00167"></a><span class="lineno"> 167</span> <span class="keywordflow">case</span> <a class="code hl_variable" href="classoperations__research_1_1sat_1_1_sat_parameters.html#a4f76a8353cf447a5ac59c2fce59f84b3">SatParameters::POLARITY_RANDOM</a>:</div>
|
|
<div class="line"><a id="l00168" name="l00168"></a><span class="lineno"> 168</span> var_polarity_[<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>] = std::uniform_int_distribution<int>(0, 1)(*random_);</div>
|
|
<div class="line"><a id="l00169" name="l00169"></a><span class="lineno"> 169</span> <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a id="l00170" name="l00170"></a><span class="lineno"> 170</span> <span class="keywordflow">case</span> <a class="code hl_variable" href="classoperations__research_1_1sat_1_1_sat_parameters.html#af6049803e9c462a8d8e4f220d30ca2b5">SatParameters::POLARITY_WEIGHTED_SIGN</a>:</div>
|
|
<div class="line"><a id="l00171" name="l00171"></a><span class="lineno"> 171</span> var_polarity_[<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>] = weighted_sign_[<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>] > 0;</div>
|
|
<div class="line"><a id="l00172" name="l00172"></a><span class="lineno"> 172</span> <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno"> 173</span> <span class="keywordflow">case</span> <a class="code hl_variable" href="classoperations__research_1_1sat_1_1_sat_parameters.html#a42df913cc432142f61613ce689c27807">SatParameters::POLARITY_REVERSE_WEIGHTED_SIGN</a>:</div>
|
|
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno"> 174</span> var_polarity_[<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>] = weighted_sign_[<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>] < 0;</div>
|
|
<div class="line"><a id="l00175" name="l00175"></a><span class="lineno"> 175</span> <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a id="l00176" name="l00176"></a><span class="lineno"> 176</span> }</div>
|
|
<div class="line"><a id="l00177" name="l00177"></a><span class="lineno"> 177</span> }</div>
|
|
<div class="line"><a id="l00178" name="l00178"></a><span class="lineno"> 178</span>}</div>
|
|
<div class="line"><a id="l00179" name="l00179"></a><span class="lineno"> 179</span> </div>
|
|
<div class="line"><a id="l00180" name="l00180"></a><span class="lineno"> 180</span><span class="keywordtype">void</span> SatDecisionPolicy::UseLongestAssignmentAsInitialPolarity() {</div>
|
|
<div class="line"><a id="l00181" name="l00181"></a><span class="lineno"> 181</span> <span class="comment">// In this special case, we just overwrite partially the current fixed</span></div>
|
|
<div class="line"><a id="l00182" name="l00182"></a><span class="lineno"> 182</span> <span class="comment">// polarity and reset the best best_partial_assignment_ for the next such</span></div>
|
|
<div class="line"><a id="l00183" name="l00183"></a><span class="lineno"> 183</span> <span class="comment">// phase.</span></div>
|
|
<div class="line"><a id="l00184" name="l00184"></a><span class="lineno"> 184</span> <span class="keywordflow">for</span> (<span class="keyword">const</span> Literal l : best_partial_assignment_) {</div>
|
|
<div class="line"><a id="l00185" name="l00185"></a><span class="lineno"> 185</span> var_polarity_[l.Variable()] = l.IsPositive();</div>
|
|
<div class="line"><a id="l00186" name="l00186"></a><span class="lineno"> 186</span> }</div>
|
|
<div class="line"><a id="l00187" name="l00187"></a><span class="lineno"> 187</span> best_partial_assignment_.clear();</div>
|
|
<div class="line"><a id="l00188" name="l00188"></a><span class="lineno"> 188</span>}</div>
|
|
<div class="line"><a id="l00189" name="l00189"></a><span class="lineno"> 189</span> </div>
|
|
<div class="line"><a id="l00190" name="l00190"></a><span class="lineno"> 190</span><span class="keywordtype">void</span> SatDecisionPolicy::FlipCurrentPolarity() {</div>
|
|
<div class="line"><a id="l00191" name="l00191"></a><span class="lineno"> 191</span> <span class="keyword">const</span> <span class="keywordtype">int</span> num_variables = var_polarity_.size();</div>
|
|
<div class="line"><a id="l00192" name="l00192"></a><span class="lineno"> 192</span> <span class="keywordflow">for</span> (BooleanVariable <a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>; <a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> < num_variables; ++<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) {</div>
|
|
<div class="line"><a id="l00193" name="l00193"></a><span class="lineno"> 193</span> var_polarity_[<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>] = !var_polarity_[<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>];</div>
|
|
<div class="line"><a id="l00194" name="l00194"></a><span class="lineno"> 194</span> }</div>
|
|
<div class="line"><a id="l00195" name="l00195"></a><span class="lineno"> 195</span>}</div>
|
|
<div class="line"><a id="l00196" name="l00196"></a><span class="lineno"> 196</span> </div>
|
|
<div class="line"><a id="l00197" name="l00197"></a><span class="lineno"> 197</span><span class="keywordtype">void</span> SatDecisionPolicy::RandomizeCurrentPolarity() {</div>
|
|
<div class="line"><a id="l00198" name="l00198"></a><span class="lineno"> 198</span> <span class="keyword">const</span> <span class="keywordtype">int</span> num_variables = var_polarity_.size();</div>
|
|
<div class="line"><a id="l00199" name="l00199"></a><span class="lineno"> 199</span> <span class="keywordflow">for</span> (BooleanVariable <a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>; <a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> < num_variables; ++<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) {</div>
|
|
<div class="line"><a id="l00200" name="l00200"></a><span class="lineno"> 200</span> var_polarity_[<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>] = std::uniform_int_distribution<int>(0, 1)(*random_);</div>
|
|
<div class="line"><a id="l00201" name="l00201"></a><span class="lineno"> 201</span> }</div>
|
|
<div class="line"><a id="l00202" name="l00202"></a><span class="lineno"> 202</span>}</div>
|
|
<div class="line"><a id="l00203" name="l00203"></a><span class="lineno"> 203</span> </div>
|
|
<div class="line"><a id="l00204" name="l00204"></a><span class="lineno"> 204</span><span class="keywordtype">void</span> SatDecisionPolicy::InitializeVariableOrdering() {</div>
|
|
<div class="line"><a id="l00205" name="l00205"></a><span class="lineno"> 205</span> <span class="keyword">const</span> <span class="keywordtype">int</span> num_variables = activities_.size();</div>
|
|
<div class="line"><a id="l00206" name="l00206"></a><span class="lineno"> 206</span> </div>
|
|
<div class="line"><a id="l00207" name="l00207"></a><span class="lineno"> 207</span> <span class="comment">// First, extract the variables without activity, and add the other to the</span></div>
|
|
<div class="line"><a id="l00208" name="l00208"></a><span class="lineno"> 208</span> <span class="comment">// priority queue.</span></div>
|
|
<div class="line"><a id="l00209" name="l00209"></a><span class="lineno"> 209</span> var_ordering_.Clear();</div>
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|
<div class="line"><a id="l00210" name="l00210"></a><span class="lineno"> 210</span> tmp_variables_.clear();</div>
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<div class="line"><a id="l00211" name="l00211"></a><span class="lineno"> 211</span> <span class="keywordflow">for</span> (BooleanVariable <a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>(0); <a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> < num_variables; ++<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) {</div>
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<div class="line"><a id="l00212" name="l00212"></a><span class="lineno"> 212</span> <span class="keywordflow">if</span> (!trail_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_trail.html#a4793952607a98dfddfbcc17abfabbb4b">Assignment</a>().<a class="code hl_function" href="classoperations__research_1_1sat_1_1_variables_assignment.html#a49e751eb6f0e9babd957889bb8e7472d">VariableIsAssigned</a>(<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) {</div>
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<div class="line"><a id="l00213" name="l00213"></a><span class="lineno"> 213</span> <span class="keywordflow">if</span> (activities_[<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>] > 0.0) {</div>
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<div class="line"><a id="l00214" name="l00214"></a><span class="lineno"> 214</span> var_ordering_.Add(</div>
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<div class="line"><a id="l00215" name="l00215"></a><span class="lineno"> 215</span> {<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>, <span class="keyword">static_cast<</span><span class="keywordtype">float</span><span class="keyword">></span>(tie_breakers_[<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>]), activities_[<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>]});</div>
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|
<div class="line"><a id="l00216" name="l00216"></a><span class="lineno"> 216</span> } <span class="keywordflow">else</span> {</div>
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<div class="line"><a id="l00217" name="l00217"></a><span class="lineno"> 217</span> tmp_variables_.push_back(<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div>
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<div class="line"><a id="l00218" name="l00218"></a><span class="lineno"> 218</span> }</div>
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<div class="line"><a id="l00219" name="l00219"></a><span class="lineno"> 219</span> }</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> </div>
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<div class="line"><a id="l00222" name="l00222"></a><span class="lineno"> 222</span> <span class="comment">// Set the order of the other according to the parameters_.</span></div>
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<div class="line"><a id="l00223" name="l00223"></a><span class="lineno"> 223</span> <span class="comment">// Note that this is just a "preference" since the priority queue will kind</span></div>
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<div class="line"><a id="l00224" name="l00224"></a><span class="lineno"> 224</span> <span class="comment">// of randomize this. However, it is more efficient than using the tie_breaker</span></div>
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|
<div class="line"><a id="l00225" name="l00225"></a><span class="lineno"> 225</span> <span class="comment">// which add a big overhead on the priority queue.</span></div>
|
|
<div class="line"><a id="l00226" name="l00226"></a><span class="lineno"> 226</span> <span class="comment">//</span></div>
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<div class="line"><a id="l00227" name="l00227"></a><span class="lineno"> 227</span> <span class="comment">// TODO(user): Experiment and come up with a good set of heuristics.</span></div>
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<div class="line"><a id="l00228" name="l00228"></a><span class="lineno"> 228</span> <span class="keywordflow">switch</span> (parameters_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_sat_parameters.html#ac2d0288eed0b7c5848d43e880edd955d">preferred_variable_order</a>()) {</div>
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<div class="line"><a id="l00229" name="l00229"></a><span class="lineno"> 229</span> <span class="keywordflow">case</span> <a class="code hl_variable" href="classoperations__research_1_1sat_1_1_sat_parameters.html#a5f93e20ddb494c7318a5bd75c4e5dbd3">SatParameters::IN_ORDER</a>:</div>
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<div class="line"><a id="l00230" name="l00230"></a><span class="lineno"> 230</span> <span class="keywordflow">break</span>;</div>
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<div class="line"><a id="l00231" name="l00231"></a><span class="lineno"> 231</span> <span class="keywordflow">case</span> <a class="code hl_variable" href="classoperations__research_1_1sat_1_1_sat_parameters.html#ac29668220ad8acbbbb01f66f694873ba">SatParameters::IN_REVERSE_ORDER</a>:</div>
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<div class="line"><a id="l00232" name="l00232"></a><span class="lineno"> 232</span> std::reverse(tmp_variables_.begin(), tmp_variables_.end());</div>
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<div class="line"><a id="l00233" name="l00233"></a><span class="lineno"> 233</span> <span class="keywordflow">break</span>;</div>
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<div class="line"><a id="l00234" name="l00234"></a><span class="lineno"> 234</span> <span class="keywordflow">case</span> <a class="code hl_variable" href="classoperations__research_1_1sat_1_1_sat_parameters.html#af35069c965baea91167ace7ecb7e1cc0">SatParameters::IN_RANDOM_ORDER</a>:</div>
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<div class="line"><a id="l00235" name="l00235"></a><span class="lineno"> 235</span> std::shuffle(tmp_variables_.begin(), tmp_variables_.end(), *random_);</div>
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|
<div class="line"><a id="l00236" name="l00236"></a><span class="lineno"> 236</span> <span class="keywordflow">break</span>;</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> </div>
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<div class="line"><a id="l00239" name="l00239"></a><span class="lineno"> 239</span> <span class="comment">// Add the variables without activity to the queue (in the default order)</span></div>
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|
<div class="line"><a id="l00240" name="l00240"></a><span class="lineno"> 240</span> <span class="keywordflow">for</span> (<span class="keyword">const</span> BooleanVariable <a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> : tmp_variables_) {</div>
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<div class="line"><a id="l00241" name="l00241"></a><span class="lineno"> 241</span> var_ordering_.Add({<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>, <span class="keyword">static_cast<</span><span class="keywordtype">float</span><span class="keyword">></span>(tie_breakers_[<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>]), 0.0});</div>
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|
<div class="line"><a id="l00242" name="l00242"></a><span class="lineno"> 242</span> }</div>
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<div class="line"><a id="l00243" name="l00243"></a><span class="lineno"> 243</span> </div>
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|
<div class="line"><a id="l00244" name="l00244"></a><span class="lineno"> 244</span> <span class="comment">// Finish the queue initialization.</span></div>
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<div class="line"><a id="l00245" name="l00245"></a><span class="lineno"> 245</span> pq_need_update_for_var_at_trail_index_.<a class="code hl_function" href="classoperations__research_1_1_bit_queue64.html#ab2fc4510692e040b62507dce522e0e31">ClearAndResize</a>(num_variables);</div>
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<div class="line"><a id="l00246" name="l00246"></a><span class="lineno"> 246</span> pq_need_update_for_var_at_trail_index_.<a class="code hl_function" href="classoperations__research_1_1_bit_queue64.html#ad169bc2e89d7b366bfe0ee5d80083c11">SetAllBefore</a>(trail_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_trail.html#a8ef12397d1682615bc3108c397734179">Index</a>());</div>
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|
<div class="line"><a id="l00247" name="l00247"></a><span class="lineno"> 247</span> var_ordering_is_initialized_ = <span class="keyword">true</span>;</div>
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|
<div class="line"><a id="l00248" name="l00248"></a><span class="lineno"> 248</span>}</div>
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<div class="line"><a id="l00249" name="l00249"></a><span class="lineno"> 249</span> </div>
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<div class="line"><a id="l00250" name="l00250"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#a955786dcbe82b7c4dc9924a5473ac1e8"> 250</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#a955786dcbe82b7c4dc9924a5473ac1e8">SatDecisionPolicy::SetAssignmentPreference</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="l00251" name="l00251"></a><span class="lineno"> 251</span> <span class="keywordtype">double</span> <a class="code hl_variable" href="pack_8cc.html#a4255f714cea26cdd64f6a0ee72d34a8c">weight</a>) {</div>
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<div class="line"><a id="l00252" name="l00252"></a><span class="lineno"> 252</span> <span class="keywordflow">if</span> (!parameters_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_sat_parameters.html#a1635a2dbd56096bb62e0581cd949cceb">use_optimization_hints</a>()) <span class="keywordflow">return</span>;</div>
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|
<div class="line"><a id="l00253" name="l00253"></a><span class="lineno"> 253</span> <a class="code hl_define" href="base_2logging_8h.html#aae2dc65d9ea248d54bf39daa986dd295">DCHECK_GE</a>(<a class="code hl_variable" href="pack_8cc.html#a4255f714cea26cdd64f6a0ee72d34a8c">weight</a>, 0.0);</div>
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<div class="line"><a id="l00254" name="l00254"></a><span class="lineno"> 254</span> <a class="code hl_define" href="base_2logging_8h.html#a4395e95bab44e222cb2e77251017a0e2">DCHECK_LE</a>(<a class="code hl_variable" href="pack_8cc.html#a4255f714cea26cdd64f6a0ee72d34a8c">weight</a>, 1.0);</div>
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<div class="line"><a id="l00255" name="l00255"></a><span class="lineno"> 255</span> </div>
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<div class="line"><a id="l00256" name="l00256"></a><span class="lineno"> 256</span> has_forced_polarity_[<a class="code hl_variable" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>.Variable()] = <span class="keyword">true</span>;</div>
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<div class="line"><a id="l00257" name="l00257"></a><span class="lineno"> 257</span> forced_polarity_[<a class="code hl_variable" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>.Variable()] = <a class="code hl_variable" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>.IsPositive();</div>
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<div class="line"><a id="l00258" name="l00258"></a><span class="lineno"> 258</span> </div>
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<div class="line"><a id="l00259" name="l00259"></a><span class="lineno"> 259</span> <span class="comment">// The tie_breaker is changed, so we need to reinitialize the priority queue.</span></div>
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<div class="line"><a id="l00260" name="l00260"></a><span class="lineno"> 260</span> <span class="comment">// Note that this doesn't change the activity though.</span></div>
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<div class="line"><a id="l00261" name="l00261"></a><span class="lineno"> 261</span> tie_breakers_[<a class="code hl_variable" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>.Variable()] = <a class="code hl_variable" href="pack_8cc.html#a4255f714cea26cdd64f6a0ee72d34a8c">weight</a>;</div>
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|
<div class="line"><a id="l00262" name="l00262"></a><span class="lineno"> 262</span> var_ordering_is_initialized_ = <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00263" name="l00263"></a><span class="lineno"> 263</span>}</div>
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<div class="line"><a id="l00264" name="l00264"></a><span class="lineno"> 264</span> </div>
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<div class="line"><a id="l00265" name="l00265"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#a0b5d7f31620ad7b364e7415c47ee5e0d"> 265</a></span>std::vector<std::pair<Literal, double>> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#a0b5d7f31620ad7b364e7415c47ee5e0d">SatDecisionPolicy::AllPreferences</a>()<span class="keyword"></span></div>
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<div class="line"><a id="l00266" name="l00266"></a><span class="lineno"> 266</span><span class="keyword"> const </span>{</div>
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<div class="line"><a id="l00267" name="l00267"></a><span class="lineno"> 267</span> std::vector<std::pair<Literal, double>> prefs;</div>
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<div class="line"><a id="l00268" name="l00268"></a><span class="lineno"> 268</span> <span class="keywordflow">for</span> (BooleanVariable <a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>(0); <a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> < var_polarity_.size(); ++<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) {</div>
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<div class="line"><a id="l00269" name="l00269"></a><span class="lineno"> 269</span> <span class="comment">// TODO(user): we currently assume that if the tie_breaker is zero then</span></div>
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<div class="line"><a id="l00270" name="l00270"></a><span class="lineno"> 270</span> <span class="comment">// no preference was set (which is not 100% correct). Fix that.</span></div>
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<div class="line"><a id="l00271" name="l00271"></a><span class="lineno"> 271</span> <span class="keyword">const</span> <span class="keywordtype">double</span> <a class="code hl_variable" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a> = var_ordering_.GetElement(<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>.value()).tie_breaker;</div>
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<div class="line"><a id="l00272" name="l00272"></a><span class="lineno"> 272</span> <span class="keywordflow">if</span> (<a class="code hl_variable" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a> > 0.0) {</div>
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<div class="line"><a id="l00273" name="l00273"></a><span class="lineno"> 273</span> prefs.push_back(std::make_pair(<a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a>(<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>, var_polarity_[<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>]), <a class="code hl_variable" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a>));</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> }</div>
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<div class="line"><a id="l00276" name="l00276"></a><span class="lineno"> 276</span> <span class="keywordflow">return</span> prefs;</div>
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<div class="line"><a id="l00277" name="l00277"></a><span class="lineno"> 277</span>}</div>
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<div class="line"><a id="l00278" name="l00278"></a><span class="lineno"> 278</span> </div>
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<div class="line"><a id="l00279" name="l00279"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#acf5ac4ce7b95b26c0eadcd6b8cbffe74"> 279</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#acf5ac4ce7b95b26c0eadcd6b8cbffe74">SatDecisionPolicy::UpdateWeightedSign</a>(</div>
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<div class="line"><a id="l00280" name="l00280"></a><span class="lineno"> 280</span> <span class="keyword">const</span> std::vector<LiteralWithCoeff>& terms, <a class="code hl_typedef" href="namespaceoperations__research_1_1math__opt.html#ab61209db5b13f0d424da009e414298fc">Coefficient</a> rhs) {</div>
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<div class="line"><a id="l00281" name="l00281"></a><span class="lineno"> 281</span> <span class="keywordflow">for</span> (<span class="keyword">const</span> <a class="code hl_struct" href="structoperations__research_1_1sat_1_1_literal_with_coeff.html">LiteralWithCoeff</a>& term : terms) {</div>
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<div class="line"><a id="l00282" name="l00282"></a><span class="lineno"> 282</span> <span class="keyword">const</span> <span class="keywordtype">double</span> <a class="code hl_variable" href="pack_8cc.html#a4255f714cea26cdd64f6a0ee72d34a8c">weight</a> = <span class="keyword">static_cast<</span><span class="keywordtype">double</span><span class="keyword">></span>(term.coefficient.value()) /</div>
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<div class="line"><a id="l00283" name="l00283"></a><span class="lineno"> 283</span> <span class="keyword">static_cast<</span><span class="keywordtype">double</span><span class="keyword">></span>(rhs.value());</div>
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<div class="line"><a id="l00284" name="l00284"></a><span class="lineno"> 284</span> weighted_sign_[term.literal.Variable()] +=</div>
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<div class="line"><a id="l00285" name="l00285"></a><span class="lineno"> 285</span> term.literal.IsPositive() ? -<a class="code hl_variable" href="pack_8cc.html#a4255f714cea26cdd64f6a0ee72d34a8c">weight</a> : <a class="code hl_variable" href="pack_8cc.html#a4255f714cea26cdd64f6a0ee72d34a8c">weight</a>;</div>
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<div class="line"><a id="l00286" name="l00286"></a><span class="lineno"> 286</span> }</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> </div>
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<div class="line"><a id="l00289" name="l00289"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#aab615de1a3b2016b0a8b8cdf05e9cf0b"> 289</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#aab615de1a3b2016b0a8b8cdf05e9cf0b">SatDecisionPolicy::BumpVariableActivities</a>(</div>
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<div class="line"><a id="l00290" name="l00290"></a><span class="lineno"> 290</span> <span class="keyword">const</span> std::vector<Literal>& literals) {</div>
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<div class="line"><a id="l00291" name="l00291"></a><span class="lineno"> 291</span> <span class="keywordflow">if</span> (parameters_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_sat_parameters.html#a22906e07897f0c712b4710d8716b8dc1">use_erwa_heuristic</a>()) {</div>
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<div class="line"><a id="l00292" name="l00292"></a><span class="lineno"> 292</span> <span class="keywordflow">for</span> (<span class="keyword">const</span> <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> : literals) {</div>
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<div class="line"><a id="l00293" name="l00293"></a><span class="lineno"> 293</span> <span class="comment">// Note that we don't really need to bump level 0 variables since they</span></div>
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<div class="line"><a id="l00294" name="l00294"></a><span class="lineno"> 294</span> <span class="comment">// will never be backtracked over. However it is faster to simply bump</span></div>
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<div class="line"><a id="l00295" name="l00295"></a><span class="lineno"> 295</span> <span class="comment">// them.</span></div>
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<div class="line"><a id="l00296" name="l00296"></a><span class="lineno"> 296</span> ++num_bumps_[<a class="code hl_variable" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>.Variable()];</div>
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<div class="line"><a id="l00297" name="l00297"></a><span class="lineno"> 297</span> }</div>
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<div class="line"><a id="l00298" name="l00298"></a><span class="lineno"> 298</span> <span class="keywordflow">return</span>;</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"> 301</span> <span class="keyword">const</span> <span class="keywordtype">double</span> max_activity_value = parameters_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_sat_parameters.html#a2dab8725b3fd2d30dc7ba633a2096ca0">max_variable_activity_value</a>();</div>
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<div class="line"><a id="l00302" name="l00302"></a><span class="lineno"> 302</span> <span class="keywordflow">for</span> (<span class="keyword">const</span> <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> : literals) {</div>
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<div class="line"><a id="l00303" name="l00303"></a><span class="lineno"> 303</span> <span class="keyword">const</span> BooleanVariable <a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = <a class="code hl_variable" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>.Variable();</div>
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<div class="line"><a id="l00304" name="l00304"></a><span class="lineno"> 304</span> <span class="keyword">const</span> <span class="keywordtype">int</span> level = trail_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_trail.html#aba78b12088909fb59dbdd0cb064412ae">Info</a>(<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>).<a class="code hl_variable" href="structoperations__research_1_1sat_1_1_assignment_info.html#a6a330c3b2adf87bfa27e9a9450d8bc40">level</a>;</div>
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<div class="line"><a id="l00305" name="l00305"></a><span class="lineno"> 305</span> <span class="keywordflow">if</span> (level == 0) <span class="keywordflow">continue</span>;</div>
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<div class="line"><a id="l00306" name="l00306"></a><span class="lineno"> 306</span> activities_[<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>] += variable_activity_increment_;</div>
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<div class="line"><a id="l00307" name="l00307"></a><span class="lineno"> 307</span> pq_need_update_for_var_at_trail_index_.<a class="code hl_function" href="classoperations__research_1_1_bit_queue64.html#a74d1ef67d47fb7f8418e53ec28a14fb3">Set</a>(trail_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_trail.html#aba78b12088909fb59dbdd0cb064412ae">Info</a>(<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>).<a class="code hl_variable" href="structoperations__research_1_1sat_1_1_assignment_info.html#a0f2d611d5c2d56f60646827438acf3af">trail_index</a>);</div>
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<div class="line"><a id="l00308" name="l00308"></a><span class="lineno"> 308</span> <span class="keywordflow">if</span> (activities_[<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>] > max_activity_value) {</div>
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<div class="line"><a id="l00309" name="l00309"></a><span class="lineno"> 309</span> RescaleVariableActivities(1.0 / max_activity_value);</div>
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<div class="line"><a id="l00310" name="l00310"></a><span class="lineno"> 310</span> }</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>}</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="keywordtype">void</span> SatDecisionPolicy::RescaleVariableActivities(<span class="keywordtype">double</span> scaling_factor) {</div>
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<div class="line"><a id="l00315" name="l00315"></a><span class="lineno"> 315</span> variable_activity_increment_ *= scaling_factor;</div>
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<div class="line"><a id="l00316" name="l00316"></a><span class="lineno"> 316</span> <span class="keywordflow">for</span> (BooleanVariable <a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>(0); <a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> < activities_.size(); ++<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> activities_[<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>] *= scaling_factor;</div>
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<div class="line"><a id="l00318" name="l00318"></a><span class="lineno"> 318</span> }</div>
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<div class="line"><a id="l00319" name="l00319"></a><span class="lineno"> 319</span> </div>
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<div class="line"><a id="l00320" name="l00320"></a><span class="lineno"> 320</span> <span class="comment">// When rescaling the activities of all the variables, the order of the</span></div>
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<div class="line"><a id="l00321" name="l00321"></a><span class="lineno"> 321</span> <span class="comment">// active variables in the heap will not change, but we still need to update</span></div>
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<div class="line"><a id="l00322" name="l00322"></a><span class="lineno"> 322</span> <span class="comment">// their weights so that newly inserted elements will compare correctly with</span></div>
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<div class="line"><a id="l00323" name="l00323"></a><span class="lineno"> 323</span> <span class="comment">// already inserted ones.</span></div>
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<div class="line"><a id="l00324" name="l00324"></a><span class="lineno"> 324</span> <span class="comment">//</span></div>
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<div class="line"><a id="l00325" name="l00325"></a><span class="lineno"> 325</span> <span class="comment">// IMPORTANT: we need to reset the full heap from scratch because just</span></div>
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<div class="line"><a id="l00326" name="l00326"></a><span class="lineno"> 326</span> <span class="comment">// multiplying the current weight by scaling_factor is not guaranteed to</span></div>
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<div class="line"><a id="l00327" name="l00327"></a><span class="lineno"> 327</span> <span class="comment">// preserve the order. This is because the activity of two entries may go to</span></div>
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<div class="line"><a id="l00328" name="l00328"></a><span class="lineno"> 328</span> <span class="comment">// zero and the tie-breaking ordering may change their relative order.</span></div>
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<div class="line"><a id="l00329" name="l00329"></a><span class="lineno"> 329</span> <span class="comment">//</span></div>
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<div class="line"><a id="l00330" name="l00330"></a><span class="lineno"> 330</span> <span class="comment">// InitializeVariableOrdering() will be called lazily only if needed.</span></div>
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<div class="line"><a id="l00331" name="l00331"></a><span class="lineno"> 331</span> var_ordering_is_initialized_ = <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00332" name="l00332"></a><span class="lineno"> 332</span>}</div>
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<div class="line"><a id="l00333" name="l00333"></a><span class="lineno"> 333</span> </div>
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<div class="line"><a id="l00334" name="l00334"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#a8bc0829ef9f6099106cab480e71ab847"> 334</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#a8bc0829ef9f6099106cab480e71ab847">SatDecisionPolicy::UpdateVariableActivityIncrement</a>() {</div>
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<div class="line"><a id="l00335" name="l00335"></a><span class="lineno"> 335</span> variable_activity_increment_ *= 1.0 / parameters_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_sat_parameters.html#a6656af65351161566d9dabfcd62546a9">variable_activity_decay</a>();</div>
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<div class="line"><a id="l00336" name="l00336"></a><span class="lineno"> 336</span>}</div>
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<div class="line"><a id="l00337" name="l00337"></a><span class="lineno"> 337</span> </div>
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<div class="line"><a id="l00338" name="l00338"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#acf014a334d9412c245c083ce69aa8716"> 338</a></span><a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#acf014a334d9412c245c083ce69aa8716">SatDecisionPolicy::NextBranch</a>() {</div>
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<div class="line"><a id="l00339" name="l00339"></a><span class="lineno"> 339</span> <span class="comment">// Lazily initialize var_ordering_ if needed.</span></div>
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<div class="line"><a id="l00340" name="l00340"></a><span class="lineno"> 340</span> <span class="keywordflow">if</span> (!var_ordering_is_initialized_) {</div>
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<div class="line"><a id="l00341" name="l00341"></a><span class="lineno"> 341</span> InitializeVariableOrdering();</div>
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<div class="line"><a id="l00342" name="l00342"></a><span class="lineno"> 342</span> }</div>
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<div class="line"><a id="l00343" name="l00343"></a><span class="lineno"> 343</span> </div>
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<div class="line"><a id="l00344" name="l00344"></a><span class="lineno"> 344</span> <span class="comment">// Choose the variable.</span></div>
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<div class="line"><a id="l00345" name="l00345"></a><span class="lineno"> 345</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="l00346" name="l00346"></a><span class="lineno"> 346</span> <span class="keyword">const</span> <span class="keywordtype">double</span> <a class="code hl_variable" href="revised__simplex_8cc.html#af01c50e388647c921aa7d9c77f2b72b2">ratio</a> = parameters_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_sat_parameters.html#acd51f700ec6afd1af748f3e6c95bcab8">random_branches_ratio</a>();</div>
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<div class="line"><a id="l00347" name="l00347"></a><span class="lineno"> 347</span> <span class="keyword">auto</span> zero_to_one = [<span class="keyword">this</span>]() {</div>
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<div class="line"><a id="l00348" name="l00348"></a><span class="lineno"> 348</span> <span class="keywordflow">return</span> std::uniform_real_distribution<double>()(*random_);</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> <span class="keywordflow">if</span> (<a class="code hl_variable" href="revised__simplex_8cc.html#af01c50e388647c921aa7d9c77f2b72b2">ratio</a> != 0.0 && zero_to_one() < <a class="code hl_variable" href="revised__simplex_8cc.html#af01c50e388647c921aa7d9c77f2b72b2">ratio</a>) {</div>
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<div class="line"><a id="l00351" name="l00351"></a><span class="lineno"> 351</span> <span class="keywordflow">while</span> (<span class="keyword">true</span>) {</div>
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<div class="line"><a id="l00352" name="l00352"></a><span class="lineno"> 352</span> <span class="comment">// TODO(user): This may not be super efficient if almost all the</span></div>
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<div class="line"><a id="l00353" name="l00353"></a><span class="lineno"> 353</span> <span class="comment">// variables are assigned.</span></div>
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<div class="line"><a id="l00354" name="l00354"></a><span class="lineno"> 354</span> std::uniform_int_distribution<int> index_dist(0,</div>
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<div class="line"><a id="l00355" name="l00355"></a><span class="lineno"> 355</span> var_ordering_.Size() - 1);</div>
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<div class="line"><a id="l00356" name="l00356"></a><span class="lineno"> 356</span> <a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = var_ordering_.QueueElement(index_dist(*random_)).var;</div>
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<div class="line"><a id="l00357" name="l00357"></a><span class="lineno"> 357</span> <span class="keywordflow">if</span> (!trail_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_trail.html#a4793952607a98dfddfbcc17abfabbb4b">Assignment</a>().<a class="code hl_function" href="classoperations__research_1_1sat_1_1_variables_assignment.html#a49e751eb6f0e9babd957889bb8e7472d">VariableIsAssigned</a>(<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) <span class="keywordflow">break</span>;</div>
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<div class="line"><a id="l00358" name="l00358"></a><span class="lineno"> 358</span> pq_need_update_for_var_at_trail_index_.<a class="code hl_function" href="classoperations__research_1_1_bit_queue64.html#a74d1ef67d47fb7f8418e53ec28a14fb3">Set</a>(trail_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_trail.html#aba78b12088909fb59dbdd0cb064412ae">Info</a>(<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>).<a class="code hl_variable" href="structoperations__research_1_1sat_1_1_assignment_info.html#a0f2d611d5c2d56f60646827438acf3af">trail_index</a>);</div>
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<div class="line"><a id="l00359" name="l00359"></a><span class="lineno"> 359</span> var_ordering_.Remove(<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>.value());</div>
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<div class="line"><a id="l00360" name="l00360"></a><span class="lineno"> 360</span> }</div>
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<div class="line"><a id="l00361" name="l00361"></a><span class="lineno"> 361</span> } <span class="keywordflow">else</span> {</div>
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<div class="line"><a id="l00362" name="l00362"></a><span class="lineno"> 362</span> <span class="comment">// The loop is done this way in order to leave the final choice in the heap.</span></div>
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<div class="line"><a id="l00363" name="l00363"></a><span class="lineno"> 363</span> <a class="code hl_define" href="base_2logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a>(!var_ordering_.IsEmpty());</div>
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<div class="line"><a id="l00364" name="l00364"></a><span class="lineno"> 364</span> <a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = var_ordering_.Top().var;</div>
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<div class="line"><a id="l00365" name="l00365"></a><span class="lineno"> 365</span> <span class="keywordflow">while</span> (trail_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_trail.html#a4793952607a98dfddfbcc17abfabbb4b">Assignment</a>().<a class="code hl_function" href="classoperations__research_1_1sat_1_1_variables_assignment.html#a49e751eb6f0e9babd957889bb8e7472d">VariableIsAssigned</a>(<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) {</div>
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<div class="line"><a id="l00366" name="l00366"></a><span class="lineno"> 366</span> var_ordering_.Pop();</div>
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<div class="line"><a id="l00367" name="l00367"></a><span class="lineno"> 367</span> pq_need_update_for_var_at_trail_index_.<a class="code hl_function" href="classoperations__research_1_1_bit_queue64.html#a74d1ef67d47fb7f8418e53ec28a14fb3">Set</a>(trail_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_trail.html#aba78b12088909fb59dbdd0cb064412ae">Info</a>(<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>).<a class="code hl_variable" href="structoperations__research_1_1sat_1_1_assignment_info.html#a0f2d611d5c2d56f60646827438acf3af">trail_index</a>);</div>
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<div class="line"><a id="l00368" name="l00368"></a><span class="lineno"> 368</span> <a class="code hl_define" href="base_2logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a>(!var_ordering_.IsEmpty());</div>
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<div class="line"><a id="l00369" name="l00369"></a><span class="lineno"> 369</span> <a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = var_ordering_.Top().var;</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> }</div>
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<div class="line"><a id="l00372" name="l00372"></a><span class="lineno"> 372</span> </div>
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<div class="line"><a id="l00373" name="l00373"></a><span class="lineno"> 373</span> <span class="comment">// Choose its polarity (i.e. True of False).</span></div>
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<div class="line"><a id="l00374" name="l00374"></a><span class="lineno"> 374</span> <span class="keyword">const</span> <span class="keywordtype">double</span> random_ratio = parameters_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_sat_parameters.html#addafb80c4da717f75a70b37d1b9d77c4">random_polarity_ratio</a>();</div>
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<div class="line"><a id="l00375" name="l00375"></a><span class="lineno"> 375</span> <span class="keywordflow">if</span> (random_ratio != 0.0 && zero_to_one() < random_ratio) {</div>
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<div class="line"><a id="l00376" name="l00376"></a><span class="lineno"> 376</span> <span class="keywordflow">return</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a>(<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>, std::uniform_int_distribution<int>(0, 1)(*random_));</div>
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<div class="line"><a id="l00377" name="l00377"></a><span class="lineno"> 377</span> }</div>
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<div class="line"><a id="l00378" name="l00378"></a><span class="lineno"> 378</span> </div>
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<div class="line"><a id="l00379" name="l00379"></a><span class="lineno"> 379</span> <span class="keywordflow">if</span> (has_forced_polarity_[<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>]) <span class="keywordflow">return</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a>(<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>, forced_polarity_[<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>]);</div>
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<div class="line"><a id="l00380" name="l00380"></a><span class="lineno"> 380</span> <span class="keywordflow">if</span> (in_stable_phase_ && has_target_polarity_[<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>]) {</div>
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<div class="line"><a id="l00381" name="l00381"></a><span class="lineno"> 381</span> <span class="keywordflow">return</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a>(<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>, target_polarity_[<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>]);</div>
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<div class="line"><a id="l00382" name="l00382"></a><span class="lineno"> 382</span> }</div>
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<div class="line"><a id="l00383" name="l00383"></a><span class="lineno"> 383</span> <span class="keywordflow">return</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a>(<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>, var_polarity_[<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>]);</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> </div>
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<div class="line"><a id="l00386" name="l00386"></a><span class="lineno"> 386</span><span class="keywordtype">void</span> SatDecisionPolicy::PqInsertOrUpdate(BooleanVariable <a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) {</div>
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<div class="line"><a id="l00387" name="l00387"></a><span class="lineno"> 387</span> <span class="keyword">const</span> WeightedVarQueueElement element{</div>
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<div class="line"><a id="l00388" name="l00388"></a><span class="lineno"> 388</span> <a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>, <span class="keyword">static_cast<</span><span class="keywordtype">float</span><span class="keyword">></span>(tie_breakers_[<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>]), activities_[<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>]};</div>
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<div class="line"><a id="l00389" name="l00389"></a><span class="lineno"> 389</span> <span class="keywordflow">if</span> (var_ordering_.Contains(<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>.value())) {</div>
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<div class="line"><a id="l00390" name="l00390"></a><span class="lineno"> 390</span> <span class="comment">// Note that the new weight should always be higher than the old one.</span></div>
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<div class="line"><a id="l00391" name="l00391"></a><span class="lineno"> 391</span> var_ordering_.IncreasePriority(element);</div>
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<div class="line"><a id="l00392" name="l00392"></a><span class="lineno"> 392</span> } <span class="keywordflow">else</span> {</div>
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<div class="line"><a id="l00393" name="l00393"></a><span class="lineno"> 393</span> var_ordering_.Add(element);</div>
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<div class="line"><a id="l00394" name="l00394"></a><span class="lineno"> 394</span> }</div>
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<div class="line"><a id="l00395" name="l00395"></a><span class="lineno"> 395</span>}</div>
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<div class="line"><a id="l00396" name="l00396"></a><span class="lineno"> 396</span> </div>
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<div class="line"><a id="l00397" name="l00397"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#aa62b9215667a0b7dc6af8251dbaba486"> 397</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#aa62b9215667a0b7dc6af8251dbaba486">SatDecisionPolicy::Untrail</a>(<span class="keywordtype">int</span> target_trail_index) {</div>
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<div class="line"><a id="l00398" name="l00398"></a><span class="lineno"> 398</span> <span class="comment">// TODO(user): avoid looping twice over the trail?</span></div>
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<div class="line"><a id="l00399" name="l00399"></a><span class="lineno"> 399</span> <span class="keywordflow">if</span> (maybe_enable_phase_saving_ && parameters_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_sat_parameters.html#a938ebad32f4c9e9e6c06cd2cee04581e">use_phase_saving</a>()) {</div>
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<div class="line"><a id="l00400" name="l00400"></a><span class="lineno"> 400</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = target_trail_index; i < trail_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_trail.html#a8ef12397d1682615bc3108c397734179">Index</a>(); ++i) {</div>
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<div class="line"><a id="l00401" name="l00401"></a><span class="lineno"> 401</span> <span class="keyword">const</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a> l = trail_[i];</div>
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<div class="line"><a id="l00402" name="l00402"></a><span class="lineno"> 402</span> var_polarity_[l.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_literal.html#a6a5dcff82096cd7a7147bf996dbaa5a8">Variable</a>()] = l.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_literal.html#ab76ca9049d6f3f1948d7120a98765107">IsPositive</a>();</div>
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<div class="line"><a id="l00403" name="l00403"></a><span class="lineno"> 403</span> }</div>
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<div class="line"><a id="l00404" name="l00404"></a><span class="lineno"> 404</span> }</div>
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<div class="line"><a id="l00405" name="l00405"></a><span class="lineno"> 405</span> </div>
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<div class="line"><a id="l00406" name="l00406"></a><span class="lineno"> 406</span> <a class="code hl_define" href="base_2logging_8h.html#ab62f5ed8f2d48e29802be0cbbcd1359a">DCHECK_LT</a>(target_trail_index, trail_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_trail.html#a8ef12397d1682615bc3108c397734179">Index</a>());</div>
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<div class="line"><a id="l00407" name="l00407"></a><span class="lineno"> 407</span> <span class="keywordflow">if</span> (parameters_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_sat_parameters.html#a22906e07897f0c712b4710d8716b8dc1">use_erwa_heuristic</a>()) {</div>
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<div class="line"><a id="l00408" name="l00408"></a><span class="lineno"> 408</span> <span class="comment">// The ERWA parameter between the new estimation of the learning rate and</span></div>
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<div class="line"><a id="l00409" name="l00409"></a><span class="lineno"> 409</span> <span class="comment">// the old one. TODO(user): Expose parameters for these values.</span></div>
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<div class="line"><a id="l00410" name="l00410"></a><span class="lineno"> 410</span> <span class="keyword">const</span> <span class="keywordtype">double</span> alpha = <a class="code hl_variable" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::max</a>(0.06, 0.4 - 1e-6 * num_conflicts_);</div>
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<div class="line"><a id="l00411" name="l00411"></a><span class="lineno"> 411</span> </div>
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<div class="line"><a id="l00412" name="l00412"></a><span class="lineno"> 412</span> <span class="comment">// This counts the number of conflicts since the assignment of the variable</span></div>
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<div class="line"><a id="l00413" name="l00413"></a><span class="lineno"> 413</span> <span class="comment">// at the current trail_index that we are about to untrail.</span></div>
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<div class="line"><a id="l00414" name="l00414"></a><span class="lineno"> 414</span> <span class="keywordtype">int</span> num_conflicts = 0;</div>
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<div class="line"><a id="l00415" name="l00415"></a><span class="lineno"> 415</span> <span class="keywordtype">int</span> next_num_conflicts_update =</div>
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<div class="line"><a id="l00416" name="l00416"></a><span class="lineno"> 416</span> num_conflicts_stack_.empty() ? -1</div>
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<div class="line"><a id="l00417" name="l00417"></a><span class="lineno"> 417</span> : num_conflicts_stack_.back().trail_index;</div>
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<div class="line"><a id="l00418" name="l00418"></a><span class="lineno"> 418</span> </div>
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<div class="line"><a id="l00419" name="l00419"></a><span class="lineno"> 419</span> <span class="keywordtype">int</span> trail_index = trail_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_trail.html#a8ef12397d1682615bc3108c397734179">Index</a>();</div>
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<div class="line"><a id="l00420" name="l00420"></a><span class="lineno"> 420</span> <span class="keywordflow">while</span> (trail_index > target_trail_index) {</div>
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<div class="line"><a id="l00421" name="l00421"></a><span class="lineno"> 421</span> <span class="keywordflow">if</span> (next_num_conflicts_update == trail_index) {</div>
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<div class="line"><a id="l00422" name="l00422"></a><span class="lineno"> 422</span> num_conflicts += num_conflicts_stack_.back().count;</div>
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<div class="line"><a id="l00423" name="l00423"></a><span class="lineno"> 423</span> num_conflicts_stack_.pop_back();</div>
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<div class="line"><a id="l00424" name="l00424"></a><span class="lineno"> 424</span> next_num_conflicts_update =</div>
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<div class="line"><a id="l00425" name="l00425"></a><span class="lineno"> 425</span> num_conflicts_stack_.empty()</div>
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<div class="line"><a id="l00426" name="l00426"></a><span class="lineno"> 426</span> ? -1</div>
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<div class="line"><a id="l00427" name="l00427"></a><span class="lineno"> 427</span> : num_conflicts_stack_.back().trail_index;</div>
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<div class="line"><a id="l00428" name="l00428"></a><span class="lineno"> 428</span> }</div>
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<div class="line"><a id="l00429" name="l00429"></a><span class="lineno"> 429</span> <span class="keyword">const</span> BooleanVariable <a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = trail_[--trail_index].Variable();</div>
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<div class="line"><a id="l00430" name="l00430"></a><span class="lineno"> 430</span> </div>
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<div class="line"><a id="l00431" name="l00431"></a><span class="lineno"> 431</span> <span class="comment">// TODO(user): This heuristic can make this code quite slow because</span></div>
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<div class="line"><a id="l00432" name="l00432"></a><span class="lineno"> 432</span> <span class="comment">// all the untrailed variable will cause a priority queue update.</span></div>
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<div class="line"><a id="l00433" name="l00433"></a><span class="lineno"> 433</span> <span class="keyword">const</span> int64_t num_bumps = num_bumps_[<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>];</div>
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|
<div class="line"><a id="l00434" name="l00434"></a><span class="lineno"> 434</span> <span class="keywordtype">double</span> new_rate = 0.0;</div>
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<div class="line"><a id="l00435" name="l00435"></a><span class="lineno"> 435</span> <span class="keywordflow">if</span> (num_bumps > 0) {</div>
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<div class="line"><a id="l00436" name="l00436"></a><span class="lineno"> 436</span> <a class="code hl_define" href="base_2logging_8h.html#ab4f56aa24c4c9cddc47a6abd2d747f9a">DCHECK_GT</a>(num_conflicts, 0);</div>
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<div class="line"><a id="l00437" name="l00437"></a><span class="lineno"> 437</span> num_bumps_[<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>] = 0;</div>
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|
<div class="line"><a id="l00438" name="l00438"></a><span class="lineno"> 438</span> new_rate = <span class="keyword">static_cast<</span><span class="keywordtype">double</span><span class="keyword">></span>(num_bumps) / num_conflicts;</div>
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<div class="line"><a id="l00439" name="l00439"></a><span class="lineno"> 439</span> }</div>
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<div class="line"><a id="l00440" name="l00440"></a><span class="lineno"> 440</span> activities_[<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>] = alpha * new_rate + (1 - alpha) * activities_[<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>];</div>
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<div class="line"><a id="l00441" name="l00441"></a><span class="lineno"> 441</span> <span class="keywordflow">if</span> (var_ordering_is_initialized_) PqInsertOrUpdate(<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div>
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<div class="line"><a id="l00442" name="l00442"></a><span class="lineno"> 442</span> }</div>
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<div class="line"><a id="l00443" name="l00443"></a><span class="lineno"> 443</span> <span class="keywordflow">if</span> (num_conflicts > 0) {</div>
|
|
<div class="line"><a id="l00444" name="l00444"></a><span class="lineno"> 444</span> <span class="keywordflow">if</span> (!num_conflicts_stack_.empty() &&</div>
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|
<div class="line"><a id="l00445" name="l00445"></a><span class="lineno"> 445</span> num_conflicts_stack_.back().trail_index == trail_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_trail.html#a8ef12397d1682615bc3108c397734179">Index</a>()) {</div>
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|
<div class="line"><a id="l00446" name="l00446"></a><span class="lineno"> 446</span> num_conflicts_stack_.back().count += num_conflicts;</div>
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<div class="line"><a id="l00447" name="l00447"></a><span class="lineno"> 447</span> } <span class="keywordflow">else</span> {</div>
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|
<div class="line"><a id="l00448" name="l00448"></a><span class="lineno"> 448</span> num_conflicts_stack_.push_back({trail_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_trail.html#a8ef12397d1682615bc3108c397734179">Index</a>(), num_conflicts});</div>
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<div class="line"><a id="l00449" name="l00449"></a><span class="lineno"> 449</span> }</div>
|
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<div class="line"><a id="l00450" name="l00450"></a><span class="lineno"> 450</span> }</div>
|
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<div class="line"><a id="l00451" name="l00451"></a><span class="lineno"> 451</span> } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a id="l00452" name="l00452"></a><span class="lineno"> 452</span> <span class="keywordflow">if</span> (!var_ordering_is_initialized_) <span class="keywordflow">return</span>;</div>
|
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<div class="line"><a id="l00453" name="l00453"></a><span class="lineno"> 453</span> </div>
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<div class="line"><a id="l00454" name="l00454"></a><span class="lineno"> 454</span> <span class="comment">// Trail index of the next variable that will need a priority queue update.</span></div>
|
|
<div class="line"><a id="l00455" name="l00455"></a><span class="lineno"> 455</span> <span class="keywordtype">int</span> to_update = pq_need_update_for_var_at_trail_index_.<a class="code hl_function" href="classoperations__research_1_1_bit_queue64.html#a2edc7a62aaf90213f6c5f765242d6488">Top</a>();</div>
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|
<div class="line"><a id="l00456" name="l00456"></a><span class="lineno"> 456</span> <span class="keywordflow">while</span> (to_update >= target_trail_index) {</div>
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<div class="line"><a id="l00457" name="l00457"></a><span class="lineno"> 457</span> <a class="code hl_define" href="base_2logging_8h.html#ab62f5ed8f2d48e29802be0cbbcd1359a">DCHECK_LT</a>(to_update, trail_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_trail.html#a8ef12397d1682615bc3108c397734179">Index</a>());</div>
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|
<div class="line"><a id="l00458" name="l00458"></a><span class="lineno"> 458</span> PqInsertOrUpdate(trail_[to_update].Variable());</div>
|
|
<div class="line"><a id="l00459" name="l00459"></a><span class="lineno"> 459</span> pq_need_update_for_var_at_trail_index_.<a class="code hl_function" href="classoperations__research_1_1_bit_queue64.html#a704ec3ccc1510e90b041a92a0e04b71c">ClearTop</a>();</div>
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|
<div class="line"><a id="l00460" name="l00460"></a><span class="lineno"> 460</span> to_update = pq_need_update_for_var_at_trail_index_.<a class="code hl_function" href="classoperations__research_1_1_bit_queue64.html#a2edc7a62aaf90213f6c5f765242d6488">Top</a>();</div>
|
|
<div class="line"><a id="l00461" name="l00461"></a><span class="lineno"> 461</span> }</div>
|
|
<div class="line"><a id="l00462" name="l00462"></a><span class="lineno"> 462</span> }</div>
|
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<div class="line"><a id="l00463" name="l00463"></a><span class="lineno"> 463</span> </div>
|
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<div class="line"><a id="l00464" name="l00464"></a><span class="lineno"> 464</span> <span class="comment">// Invariant.</span></div>
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<div class="line"><a id="l00465" name="l00465"></a><span class="lineno"> 465</span> <span class="keywordflow">if</span> (<a class="code hl_variable" href="macros_8h.html#a7f536a3b33f9bed8f75734e035d30725">DEBUG_MODE</a> && var_ordering_is_initialized_) {</div>
|
|
<div class="line"><a id="l00466" name="l00466"></a><span class="lineno"> 466</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> trail_index = trail_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_trail.html#a8ef12397d1682615bc3108c397734179">Index</a>() - 1; trail_index > target_trail_index;</div>
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<div class="line"><a id="l00467" name="l00467"></a><span class="lineno"> 467</span> --trail_index) {</div>
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<div class="line"><a id="l00468" name="l00468"></a><span class="lineno"> 468</span> <span class="keyword">const</span> BooleanVariable <a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = trail_[trail_index].Variable();</div>
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<div class="line"><a id="l00469" name="l00469"></a><span class="lineno"> 469</span> <a class="code hl_define" href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a>(var_ordering_.Contains(<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>.value()));</div>
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|
<div class="line"><a id="l00470" name="l00470"></a><span class="lineno"> 470</span> <a class="code hl_define" href="base_2logging_8h.html#a7c0ce053b28d53aa4eaf3eb7fb71663b">CHECK_EQ</a>(activities_[<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>], var_ordering_.GetElement(<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>.value()).weight);</div>
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<div class="line"><a id="l00471" name="l00471"></a><span class="lineno"> 471</span> }</div>
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<div class="line"><a id="l00472" name="l00472"></a><span class="lineno"> 472</span> }</div>
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<div class="line"><a id="l00473" name="l00473"></a><span class="lineno"> 473</span>}</div>
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<div class="line"><a id="l00474" name="l00474"></a><span class="lineno"> 474</span> </div>
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<div class="line"><a id="l00475" name="l00475"></a><span class="lineno"> 475</span>} <span class="comment">// namespace sat</span></div>
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<div class="line"><a id="l00476" name="l00476"></a><span class="lineno"> 476</span>} <span class="comment">// namespace operations_research</span></div>
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<div class="ttc" id="aalldiff__cst_8cc_html_a26e6db9bcc64b584051ecc28171ed11f"><div class="ttname"><a href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">max</a></div><div class="ttdeci">int64_t max</div><div class="ttdef"><b>Definition:</b> <a href="alldiff__cst_8cc_source.html#l00140">alldiff_cst.cc:140</a></div></div>
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<div class="ttc" id="abase_2logging_8h_html_a3e1cfef60e774a81f30eaddf26a3a274"><div class="ttname"><a href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a></div><div class="ttdeci">#define CHECK(condition)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00491">base/logging.h:491</a></div></div>
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<div class="ttc" id="abase_2logging_8h_html_a4395e95bab44e222cb2e77251017a0e2"><div class="ttname"><a href="base_2logging_8h.html#a4395e95bab44e222cb2e77251017a0e2">DCHECK_LE</a></div><div class="ttdeci">#define DCHECK_LE(val1, val2)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00888">base/logging.h:888</a></div></div>
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<div class="ttc" id="abase_2logging_8h_html_a7c0ce053b28d53aa4eaf3eb7fb71663b"><div class="ttname"><a href="base_2logging_8h.html#a7c0ce053b28d53aa4eaf3eb7fb71663b">CHECK_EQ</a></div><div class="ttdeci">#define CHECK_EQ(val1, val2)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00698">base/logging.h:698</a></div></div>
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<div class="ttc" id="abase_2logging_8h_html_aae2dc65d9ea248d54bf39daa986dd295"><div class="ttname"><a href="base_2logging_8h.html#aae2dc65d9ea248d54bf39daa986dd295">DCHECK_GE</a></div><div class="ttdeci">#define DCHECK_GE(val1, val2)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00890">base/logging.h:890</a></div></div>
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<div class="ttc" id="abase_2logging_8h_html_ab4f56aa24c4c9cddc47a6abd2d747f9a"><div class="ttname"><a href="base_2logging_8h.html#ab4f56aa24c4c9cddc47a6abd2d747f9a">DCHECK_GT</a></div><div class="ttdeci">#define DCHECK_GT(val1, val2)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00891">base/logging.h:891</a></div></div>
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<div class="ttc" id="abase_2logging_8h_html_ab62f5ed8f2d48e29802be0cbbcd1359a"><div class="ttname"><a href="base_2logging_8h.html#ab62f5ed8f2d48e29802be0cbbcd1359a">DCHECK_LT</a></div><div class="ttdeci">#define DCHECK_LT(val1, val2)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00889">base/logging.h:889</a></div></div>
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<div class="ttc" id="abase_2logging_8h_html_ae17f8119c108cf3070bad3449c7e0006"><div class="ttname"><a href="base_2logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a></div><div class="ttdeci">#define DCHECK(condition)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00885">base/logging.h:885</a></div></div>
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<div class="ttc" id="abase_2logging_8h_html_afcaa7cadd41741bb855c2ada1d2ef927"><div class="ttname"><a href="base_2logging_8h.html#afcaa7cadd41741bb855c2ada1d2ef927">VLOG</a></div><div class="ttdeci">#define VLOG(verboselevel)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00979">base/logging.h:979</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_bit_queue64_html_a2c9e03b5ffa844d119c926de4689ce59"><div class="ttname"><a href="classoperations__research_1_1_bit_queue64.html#a2c9e03b5ffa844d119c926de4689ce59">operations_research::BitQueue64::IncreaseSize</a></div><div class="ttdeci">void IncreaseSize(int size)</div><div class="ttdef"><b>Definition:</b> <a href="bitset_8h_source.html#l00690">bitset.h:690</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_bit_queue64_html_a2edc7a62aaf90213f6c5f765242d6488"><div class="ttname"><a href="classoperations__research_1_1_bit_queue64.html#a2edc7a62aaf90213f6c5f765242d6488">operations_research::BitQueue64::Top</a></div><div class="ttdeci">int Top() const</div><div class="ttdef"><b>Definition:</b> <a href="bitset_8h_source.html#l00722">bitset.h:722</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_bit_queue64_html_a704ec3ccc1510e90b041a92a0e04b71c"><div class="ttname"><a href="classoperations__research_1_1_bit_queue64.html#a704ec3ccc1510e90b041a92a0e04b71c">operations_research::BitQueue64::ClearTop</a></div><div class="ttdeci">void ClearTop()</div><div class="ttdef"><b>Definition:</b> <a href="bitset_8h_source.html#l00725">bitset.h:725</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_bit_queue64_html_a74d1ef67d47fb7f8418e53ec28a14fb3"><div class="ttname"><a href="classoperations__research_1_1_bit_queue64.html#a74d1ef67d47fb7f8418e53ec28a14fb3">operations_research::BitQueue64::Set</a></div><div class="ttdeci">void Set(int i)</div><div class="ttdef"><b>Definition:</b> <a href="bitset_8h_source.html#l00702">bitset.h:702</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_bit_queue64_html_ab2fc4510692e040b62507dce522e0e31"><div class="ttname"><a href="classoperations__research_1_1_bit_queue64.html#ab2fc4510692e040b62507dce522e0e31">operations_research::BitQueue64::ClearAndResize</a></div><div class="ttdeci">void ClearAndResize(int size)</div><div class="ttdef"><b>Definition:</b> <a href="bitset_8h_source.html#l00696">bitset.h:696</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_bit_queue64_html_ad169bc2e89d7b366bfe0ee5d80083c11"><div class="ttname"><a href="classoperations__research_1_1_bit_queue64.html#ad169bc2e89d7b366bfe0ee5d80083c11">operations_research::BitQueue64::SetAllBefore</a></div><div class="ttdeci">void SetAllBefore(int i)</div><div class="ttdef"><b>Definition:</b> <a href="bitset_8h_source.html#l00710">bitset.h:710</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#l00065">sat_base.h:65</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_literal_html_a6a5dcff82096cd7a7147bf996dbaa5a8"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_literal.html#a6a5dcff82096cd7a7147bf996dbaa5a8">operations_research::sat::Literal::Variable</a></div><div class="ttdeci">BooleanVariable Variable() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__base_8h_source.html#l00081">sat_base.h:81</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_literal_html_ab76ca9049d6f3f1948d7120a98765107"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_literal.html#ab76ca9049d6f3f1948d7120a98765107">operations_research::sat::Literal::IsPositive</a></div><div class="ttdeci">bool IsPositive() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__base_8h_source.html#l00082">sat_base.h:82</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#l00038">sat/model.h:38</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#l00041">sat/util.h:41</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_sat_decision_policy_html_a0b5d7f31620ad7b364e7415c47ee5e0d"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#a0b5d7f31620ad7b364e7415c47ee5e0d">operations_research::sat::SatDecisionPolicy::AllPreferences</a></div><div class="ttdeci">std::vector< std::pair< Literal, double > > AllPreferences() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__decision_8cc_source.html#l00265">sat_decision.cc:265</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_sat_decision_policy_html_a19614231a107b165113595bf8edf60bf"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#a19614231a107b165113595bf8edf60bf">operations_research::sat::SatDecisionPolicy::IncreaseNumVariables</a></div><div class="ttdeci">void IncreaseNumVariables(int num_variables)</div><div class="ttdef"><b>Definition:</b> <a href="sat__decision_8cc_source.html#l00028">sat_decision.cc:28</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_sat_decision_policy_html_a1dc177ee88f0a7ce2e46a032e5c3cf02"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#a1dc177ee88f0a7ce2e46a032e5c3cf02">operations_research::sat::SatDecisionPolicy::ResetDecisionHeuristic</a></div><div class="ttdeci">void ResetDecisionHeuristic()</div><div class="ttdef"><b>Definition:</b> <a href="sat__decision_8cc_source.html#l00128">sat_decision.cc:128</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_sat_decision_policy_html_a8bc0829ef9f6099106cab480e71ab847"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#a8bc0829ef9f6099106cab480e71ab847">operations_research::sat::SatDecisionPolicy::UpdateVariableActivityIncrement</a></div><div class="ttdeci">void UpdateVariableActivityIncrement()</div><div class="ttdef"><b>Definition:</b> <a href="sat__decision_8cc_source.html#l00334">sat_decision.cc:334</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_sat_decision_policy_html_a955786dcbe82b7c4dc9924a5473ac1e8"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#a955786dcbe82b7c4dc9924a5473ac1e8">operations_research::sat::SatDecisionPolicy::SetAssignmentPreference</a></div><div class="ttdeci">void SetAssignmentPreference(Literal literal, double weight)</div><div class="ttdef"><b>Definition:</b> <a href="sat__decision_8cc_source.html#l00250">sat_decision.cc:250</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_sat_decision_policy_html_aa62b9215667a0b7dc6af8251dbaba486"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#aa62b9215667a0b7dc6af8251dbaba486">operations_research::sat::SatDecisionPolicy::Untrail</a></div><div class="ttdeci">void Untrail(int target_trail_index)</div><div class="ttdef"><b>Definition:</b> <a href="sat__decision_8cc_source.html#l00397">sat_decision.cc:397</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_sat_decision_policy_html_aab615de1a3b2016b0a8b8cdf05e9cf0b"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#aab615de1a3b2016b0a8b8cdf05e9cf0b">operations_research::sat::SatDecisionPolicy::BumpVariableActivities</a></div><div class="ttdeci">void BumpVariableActivities(const std::vector< Literal > &literals)</div><div class="ttdef"><b>Definition:</b> <a href="sat__decision_8cc_source.html#l00289">sat_decision.cc:289</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_sat_decision_policy_html_abe906f3b347e87b5e91e7ab5609b0f36"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#abe906f3b347e87b5e91e7ab5609b0f36">operations_research::sat::SatDecisionPolicy::BeforeConflict</a></div><div class="ttdeci">void BeforeConflict(int trail_index)</div><div class="ttdef"><b>Definition:</b> <a href="sat__decision_8cc_source.html#l00057">sat_decision.cc:57</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_sat_decision_policy_html_acf014a334d9412c245c083ce69aa8716"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#acf014a334d9412c245c083ce69aa8716">operations_research::sat::SatDecisionPolicy::NextBranch</a></div><div class="ttdeci">Literal NextBranch()</div><div class="ttdef"><b>Definition:</b> <a href="sat__decision_8cc_source.html#l00338">sat_decision.cc:338</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_sat_decision_policy_html_acf5ac4ce7b95b26c0eadcd6b8cbffe74"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#acf5ac4ce7b95b26c0eadcd6b8cbffe74">operations_research::sat::SatDecisionPolicy::UpdateWeightedSign</a></div><div class="ttdeci">void UpdateWeightedSign(const std::vector< LiteralWithCoeff > &terms, Coefficient rhs)</div><div class="ttdef"><b>Definition:</b> <a href="sat__decision_8cc_source.html#l00279">sat_decision.cc:279</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_sat_decision_policy_html_af3bcc41cd4c20ff0a694cbfd18cb0e1e"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#af3bcc41cd4c20ff0a694cbfd18cb0e1e">operations_research::sat::SatDecisionPolicy::SatDecisionPolicy</a></div><div class="ttdeci">SatDecisionPolicy(Model *model)</div><div class="ttdef"><b>Definition:</b> <a href="sat__decision_8cc_source.html#l00023">sat_decision.cc:23</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_sat_parameters_html"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html">operations_research::sat::SatParameters</a></div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l00347">sat_parameters.pb.h:348</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_sat_parameters_html_a0373caf3798876819f17810804214df0"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#a0373caf3798876819f17810804214df0">operations_research::sat::SatParameters::POLARITY_FALSE</a></div><div class="ttdeci">static constexpr Polarity POLARITY_FALSE</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l00505">sat_parameters.pb.h:505</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_sat_parameters_html_a1635a2dbd56096bb62e0581cd949cceb"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#a1635a2dbd56096bb62e0581cd949cceb">operations_research::sat::SatParameters::use_optimization_hints</a></div><div class="ttdeci">bool use_optimization_hints() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l05893">sat_parameters.pb.h:5893</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_sat_parameters_html_a222e319d48fb95a500e0cd87721dabbb"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#a222e319d48fb95a500e0cd87721dabbb">operations_research::sat::SatParameters::POLARITY_TRUE</a></div><div class="ttdeci">static constexpr Polarity POLARITY_TRUE</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l00503">sat_parameters.pb.h:503</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_sat_parameters_html_a22906e07897f0c712b4710d8716b8dc1"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#a22906e07897f0c712b4710d8716b8dc1">operations_research::sat::SatParameters::use_erwa_heuristic</a></div><div class="ttdeci">bool use_erwa_heuristic() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l03683">sat_parameters.pb.h:3683</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_sat_parameters_html_a2dab8725b3fd2d30dc7ba633a2096ca0"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#a2dab8725b3fd2d30dc7ba633a2096ca0">operations_research::sat::SatParameters::max_variable_activity_value</a></div><div class="ttdeci">double max_variable_activity_value() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l04163">sat_parameters.pb.h:4163</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_sat_parameters_html_a42df913cc432142f61613ce689c27807"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#a42df913cc432142f61613ce689c27807">operations_research::sat::SatParameters::POLARITY_REVERSE_WEIGHTED_SIGN</a></div><div class="ttdeci">static constexpr Polarity POLARITY_REVERSE_WEIGHTED_SIGN</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l00511">sat_parameters.pb.h:511</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_sat_parameters_html_a4f76a8353cf447a5ac59c2fce59f84b3"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#a4f76a8353cf447a5ac59c2fce59f84b3">operations_research::sat::SatParameters::POLARITY_RANDOM</a></div><div class="ttdeci">static constexpr Polarity POLARITY_RANDOM</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l00507">sat_parameters.pb.h:507</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_sat_parameters_html_a5f93e20ddb494c7318a5bd75c4e5dbd3"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#a5f93e20ddb494c7318a5bd75c4e5dbd3">operations_research::sat::SatParameters::IN_ORDER</a></div><div class="ttdeci">static constexpr VariableOrder IN_ORDER</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l00471">sat_parameters.pb.h:471</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_sat_parameters_html_a6656af65351161566d9dabfcd62546a9"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#a6656af65351161566d9dabfcd62546a9">operations_research::sat::SatParameters::variable_activity_decay</a></div><div class="ttdeci">double variable_activity_decay() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l04135">sat_parameters.pb.h:4135</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_sat_parameters_html_a938ebad32f4c9e9e6c06cd2cee04581e"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#a938ebad32f4c9e9e6c06cd2cee04581e">operations_research::sat::SatParameters::use_phase_saving</a></div><div class="ttdeci">bool use_phase_saving() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l03571">sat_parameters.pb.h:3571</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_sat_parameters_html_a93f25af8b4b4d05251e0c8022e89cc5f"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#a93f25af8b4b4d05251e0c8022e89cc5f">operations_research::sat::SatParameters::polarity_rephase_increment</a></div><div class="ttdeci">::PROTOBUF_NAMESPACE_ID::int32 polarity_rephase_increment() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l03599">sat_parameters.pb.h:3599</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_sat_parameters_html_ac29668220ad8acbbbb01f66f694873ba"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#ac29668220ad8acbbbb01f66f694873ba">operations_research::sat::SatParameters::IN_REVERSE_ORDER</a></div><div class="ttdeci">static constexpr VariableOrder IN_REVERSE_ORDER</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l00473">sat_parameters.pb.h:473</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_sat_parameters_html_ac2d0288eed0b7c5848d43e880edd955d"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#ac2d0288eed0b7c5848d43e880edd955d">operations_research::sat::SatParameters::preferred_variable_order</a></div><div class="ttdeci">::operations_research::sat::SatParameters_VariableOrder preferred_variable_order() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l03513">sat_parameters.pb.h:3513</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_sat_parameters_html_acabedd7725b642e1e6a45cd189f7345a"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#acabedd7725b642e1e6a45cd189f7345a">operations_research::sat::SatParameters::initial_variables_activity</a></div><div class="ttdeci">double initial_variables_activity() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l03711">sat_parameters.pb.h:3711</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_sat_parameters_html_acd51f700ec6afd1af748f3e6c95bcab8"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#acd51f700ec6afd1af748f3e6c95bcab8">operations_research::sat::SatParameters::random_branches_ratio</a></div><div class="ttdeci">double random_branches_ratio() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l03655">sat_parameters.pb.h:3655</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_sat_parameters_html_acdf9e882380c9dc5181445d12ef0e455"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#acdf9e882380c9dc5181445d12ef0e455">operations_research::sat::SatParameters::initial_polarity</a></div><div class="ttdeci">::operations_research::sat::SatParameters_Polarity initial_polarity() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l03542">sat_parameters.pb.h:3542</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_sat_parameters_html_addafb80c4da717f75a70b37d1b9d77c4"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#addafb80c4da717f75a70b37d1b9d77c4">operations_research::sat::SatParameters::random_polarity_ratio</a></div><div class="ttdeci">double random_polarity_ratio() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l03627">sat_parameters.pb.h:3627</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_sat_parameters_html_af35069c965baea91167ace7ecb7e1cc0"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#af35069c965baea91167ace7ecb7e1cc0">operations_research::sat::SatParameters::IN_RANDOM_ORDER</a></div><div class="ttdeci">static constexpr VariableOrder IN_RANDOM_ORDER</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l00475">sat_parameters.pb.h:475</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_sat_parameters_html_af6049803e9c462a8d8e4f220d30ca2b5"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_sat_parameters.html#af6049803e9c462a8d8e4f220d30ca2b5">operations_research::sat::SatParameters::POLARITY_WEIGHTED_SIGN</a></div><div class="ttdeci">static constexpr Polarity POLARITY_WEIGHTED_SIGN</div><div class="ttdef"><b>Definition:</b> <a href="sat__parameters_8pb_8h_source.html#l00509">sat_parameters.pb.h:509</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#l00234">sat_base.h:234</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_trail_html_a4793952607a98dfddfbcc17abfabbb4b"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_trail.html#a4793952607a98dfddfbcc17abfabbb4b">operations_research::sat::Trail::Assignment</a></div><div class="ttdeci">const VariablesAssignment & Assignment() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__base_8h_source.html#l00381">sat_base.h:381</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_trail_html_a8ef12397d1682615bc3108c397734179"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_trail.html#a8ef12397d1682615bc3108c397734179">operations_research::sat::Trail::Index</a></div><div class="ttdeci">int Index() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__base_8h_source.html#l00379">sat_base.h:379</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_trail_html_aba78b12088909fb59dbdd0cb064412ae"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_trail.html#aba78b12088909fb59dbdd0cb064412ae">operations_research::sat::Trail::Info</a></div><div class="ttdeci">const AssignmentInfo & Info(BooleanVariable var) const</div><div class="ttdef"><b>Definition:</b> <a href="sat__base_8h_source.html#l00382">sat_base.h:382</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_variables_assignment_html_a49e751eb6f0e9babd957889bb8e7472d"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_variables_assignment.html#a49e751eb6f0e9babd957889bb8e7472d">operations_research::sat::VariablesAssignment::VariableIsAssigned</a></div><div class="ttdeci">bool VariableIsAssigned(BooleanVariable var) const</div><div class="ttdef"><b>Definition:</b> <a href="sat__base_8h_source.html#l00159">sat_base.h:159</a></div></div>
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<div class="ttc" id="ademon__profiler_8cc_html_ac072af30c4ffbc834bb4c681f6ecb514"><div class="ttname"><a href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a></div><div class="ttdeci">int64_t value</div><div class="ttdef"><b>Definition:</b> <a href="demon__profiler_8cc_source.html#l00044">demon_profiler.cc:44</a></div></div>
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<div class="ttc" id="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#l00273">gurobi_interface.cc:273</a></div></div>
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<div class="ttc" id="amacros_8h_html_a7f536a3b33f9bed8f75734e035d30725"><div class="ttname"><a href="macros_8h.html#a7f536a3b33f9bed8f75734e035d30725">DEBUG_MODE</a></div><div class="ttdeci">const bool DEBUG_MODE</div><div class="ttdef"><b>Definition:</b> <a href="macros_8h_source.html#l00024">macros.h:24</a></div></div>
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<div class="ttc" id="anamespaceoperations__research_1_1math__opt_html_ab61209db5b13f0d424da009e414298fc"><div class="ttname"><a href="namespaceoperations__research_1_1math__opt.html#ab61209db5b13f0d424da009e414298fc">operations_research::math_opt::Coefficient</a></div><div class="ttdeci">std::tuple< int64_t, int64_t, const double > Coefficient</div><div class="ttdef"><b>Definition:</b> <a href="sparse__collection__matchers_8h_source.html#l00061">sparse_collection_matchers.h:61</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#l00085">optimization.cc:85</a></div></div>
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<div class="ttc" id="apack_8cc_html_a4255f714cea26cdd64f6a0ee72d34a8c"><div class="ttname"><a href="pack_8cc.html#a4255f714cea26cdd64f6a0ee72d34a8c">weight</a></div><div class="ttdeci">int64_t weight</div><div class="ttdef"><b>Definition:</b> <a href="pack_8cc_source.html#l00510">pack.cc:510</a></div></div>
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<div class="ttc" id="arevised__simplex_8cc_html_af01c50e388647c921aa7d9c77f2b72b2"><div class="ttname"><a href="revised__simplex_8cc.html#af01c50e388647c921aa7d9c77f2b72b2">ratio</a></div><div class="ttdeci">Fractional ratio</div><div class="ttdef"><b>Definition:</b> <a href="revised__simplex_8cc_source.html#l01917">revised_simplex.cc:1917</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__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="astructoperations__research_1_1sat_1_1_assignment_info_html_a0f2d611d5c2d56f60646827438acf3af"><div class="ttname"><a href="structoperations__research_1_1sat_1_1_assignment_info.html#a0f2d611d5c2d56f60646827438acf3af">operations_research::sat::AssignmentInfo::trail_index</a></div><div class="ttdeci">int32_t trail_index</div><div class="ttdef"><b>Definition:</b> <a href="sat__base_8h_source.html#l00209">sat_base.h:209</a></div></div>
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<div class="ttc" id="astructoperations__research_1_1sat_1_1_assignment_info_html_a6a330c3b2adf87bfa27e9a9450d8bc40"><div class="ttname"><a href="structoperations__research_1_1sat_1_1_assignment_info.html#a6a330c3b2adf87bfa27e9a9450d8bc40">operations_research::sat::AssignmentInfo::level</a></div><div class="ttdeci">uint32_t level</div><div class="ttdef"><b>Definition:</b> <a href="sat__base_8h_source.html#l00200">sat_base.h:200</a></div></div>
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<div class="ttc" id="astructoperations__research_1_1sat_1_1_literal_with_coeff_html"><div class="ttname"><a href="structoperations__research_1_1sat_1_1_literal_with_coeff.html">operations_research::sat::LiteralWithCoeff</a></div><div class="ttdef"><b>Definition:</b> <a href="pb__constraint_8h_source.html#l00050">pb_constraint.h:50</a></div></div>
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