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<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 name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// Copyright 2010-2018 Google LLC</span></div>
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">// Licensed under the Apache License, Version 2.0 (the "License");</span></div>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// you may not use this file except in compliance with the License.</span></div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">// You may obtain a copy of the License at</span></div>
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<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">//</span></div>
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<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">// http://www.apache.org/licenses/LICENSE-2.0</span></div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">//</span></div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">// Unless required by applicable law or agreed to in writing, software</span></div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">// distributed under the License is distributed on an "AS IS" BASIS,</span></div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment">// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">// See the License for the specific language governing permissions and</span></div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment">// limitations under the License.</span></div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>  </div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#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 name="l00015"></a><span class="lineno"> 15</span>  </div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</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 name="l00017"></a><span class="lineno"> 17</span>  </div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="keyword">namespace </span><a class="code" href="namespaceoperations__research.html">operations_research</a> {</div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="keyword">namespace </span>sat {</div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  </div>
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<div class="line"><a name="l00021"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#af3bcc41cd4c20ff0a694cbfd18cb0e1e"> 21</a></span> <a class="code" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#af3bcc41cd4c20ff0a694cbfd18cb0e1e">SatDecisionPolicy::SatDecisionPolicy</a>(<a class="code" href="classoperations__research_1_1sat_1_1_model.html">Model</a>* <a class="code" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>)</div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  : parameters_(*(<a class="code" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>->GetOrCreate<SatParameters>())),</div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  trail_(*<a class="code" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>->GetOrCreate<<a class="code" href="classoperations__research_1_1sat_1_1_trail.html">Trail</a>>()),</div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  random_(<a class="code" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>->GetOrCreate<<a class="code" href="structoperations__research_1_1sat_1_1_model_random_generator.html">ModelRandomGenerator</a>>()) {}</div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  </div>
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<div class="line"><a name="l00026"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#a19614231a107b165113595bf8edf60bf"> 26</a></span> <span class="keywordtype">void</span> <a class="code" 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 name="l00027"></a><span class="lineno"> 27</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> old_num_variables = activities_.<a class="code" href="classgtl_1_1_i_t_i_vector.html#a60304b65bf89363bcc3165d3cde67f86">size</a>();</div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  DCHECK_GE(num_variables, activities_.<a class="code" href="classgtl_1_1_i_t_i_vector.html#a60304b65bf89363bcc3165d3cde67f86">size</a>());</div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  </div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  activities_.<a class="code" href="classgtl_1_1_i_t_i_vector.html#a4e3670a285a3642eaa07f66766cffa72">resize</a>(num_variables, parameters_.initial_variables_activity());</div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  tie_breakers_.<a class="code" href="classgtl_1_1_i_t_i_vector.html#a4e3670a285a3642eaa07f66766cffa72">resize</a>(num_variables, 0.0);</div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  num_bumps_.<a class="code" href="classgtl_1_1_i_t_i_vector.html#a4e3670a285a3642eaa07f66766cffa72">resize</a>(num_variables, 0);</div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  pq_need_update_for_var_at_trail_index_.<a class="code" href="classoperations__research_1_1_bit_queue64.html#a2c9e03b5ffa844d119c926de4689ce59">IncreaseSize</a>(num_variables);</div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  </div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  weighted_sign_.<a class="code" href="classgtl_1_1_i_t_i_vector.html#a4e3670a285a3642eaa07f66766cffa72">resize</a>(num_variables, 0.0);</div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  </div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  has_forced_polarity_.<a class="code" href="classgtl_1_1_i_t_i_vector.html#a4e3670a285a3642eaa07f66766cffa72">resize</a>(num_variables, <span class="keyword">false</span>);</div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  forced_polarity_.<a class="code" href="classgtl_1_1_i_t_i_vector.html#a4e3670a285a3642eaa07f66766cffa72">resize</a>(num_variables);</div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  has_target_polarity_.<a class="code" href="classgtl_1_1_i_t_i_vector.html#a4e3670a285a3642eaa07f66766cffa72">resize</a>(num_variables, <span class="keyword">false</span>);</div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  target_polarity_.<a class="code" href="classgtl_1_1_i_t_i_vector.html#a4e3670a285a3642eaa07f66766cffa72">resize</a>(num_variables);</div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  var_polarity_.<a class="code" href="classgtl_1_1_i_t_i_vector.html#a4e3670a285a3642eaa07f66766cffa72">resize</a>(num_variables);</div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  </div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  ResetInitialPolarity(<span class="comment">/*from=*/</span>old_num_variables);</div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  </div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</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 name="l00046"></a><span class="lineno"> 46</span>  <span class="comment">// the priority is 0.0.</span></div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  var_ordering_.<a class="code" href="classoperations__research_1_1_integer_priority_queue.html#a21cecbc35e3da9931f94afa3229354dc">Reserve</a>(num_variables);</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keywordflow">if</span> (var_ordering_is_initialized_) {</div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keywordflow">for</span> (BooleanVariable <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>(old_num_variables); <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> < num_variables; ++<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) {</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  var_ordering_.<a class="code" href="classoperations__research_1_1_integer_priority_queue.html#a260b134ff6e3aa564e8ba1f879aea3d9">Add</a>({<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>, 0.0, activities_[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>]});</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  }</div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  }</div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> }</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  </div>
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<div class="line"><a name="l00055"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#abe906f3b347e87b5e91e7ab5609b0f36"> 55</a></span> <span class="keywordtype">void</span> <a class="code" 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 name="l00056"></a><span class="lineno"> 56</span>  <span class="keywordflow">if</span> (parameters_.use_erwa_heuristic()) {</div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  ++num_conflicts_;</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  num_conflicts_stack_.push_back({trail_.<a class="code" href="classoperations__research_1_1sat_1_1_trail.html#a8ef12397d1682615bc3108c397734179">Index</a>(), 1});</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  }</div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  </div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keywordflow">if</span> (trail_index > target_length_) {</div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  target_length_ = trail_index;</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  has_target_polarity_.<a class="code" href="classgtl_1_1_i_t_i_vector.html#a184fe69018ae421dcf31c964bfe40576">assign</a>(has_target_polarity_.<a class="code" href="classgtl_1_1_i_t_i_vector.html#a60304b65bf89363bcc3165d3cde67f86">size</a>(), <span class="keyword">false</span>);</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</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 name="l00065"></a><span class="lineno"> 65</span>  <span class="keyword">const</span> <a class="code" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a> l = trail_[i];</div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  has_target_polarity_[l.<a class="code" 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 name="l00067"></a><span class="lineno"> 67</span>  target_polarity_[l.<a class="code" href="classoperations__research_1_1sat_1_1_literal.html#a6a5dcff82096cd7a7147bf996dbaa5a8">Variable</a>()] = l.<a class="code" href="classoperations__research_1_1sat_1_1_literal.html#ab76ca9049d6f3f1948d7120a98765107">IsPositive</a>();</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  }</div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  }</div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  </div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keywordflow">if</span> (trail_index > best_partial_assignment_.size()) {</div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  best_partial_assignment_.assign(&trail_[0], &trail_[trail_index]);</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  }</div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  </div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  --num_conflicts_until_rephase_;</div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  RephaseIfNeeded();</div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> }</div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  </div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="keywordtype">void</span> SatDecisionPolicy::RephaseIfNeeded() {</div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keywordflow">if</span> (parameters_.polarity_rephase_increment() <= 0) <span class="keywordflow">return</span>;</div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</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 name="l00082"></a><span class="lineno"> 82</span>  </div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  VLOG(1) << <span class="stringliteral">"End of polarity phase "</span> << polarity_phase_</div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  << <span class="stringliteral">" target_length: "</span> << target_length_</div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  << <span class="stringliteral">" best_length: "</span> << best_partial_assignment_.size();</div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  </div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  ++polarity_phase_;</div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  num_conflicts_until_rephase_ =</div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  parameters_.polarity_rephase_increment() * (polarity_phase_ + 1);</div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  </div>
|
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="comment">// We always reset the target each time we change phase.</span></div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  target_length_ = 0;</div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  has_target_polarity_.<a class="code" href="classgtl_1_1_i_t_i_vector.html#a184fe69018ae421dcf31c964bfe40576">assign</a>(has_target_polarity_.<a class="code" href="classgtl_1_1_i_t_i_vector.html#a60304b65bf89363bcc3165d3cde67f86">size</a>(), <span class="keyword">false</span>);</div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  </div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="comment">// Cycle between different initial polarities. Note that we already start by</span></div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="comment">// the default polarity, and this code is reached the first time with a</span></div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="comment">// polarity_phase_ of 1.</span></div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keywordflow">switch</span> (polarity_phase_ % 8) {</div>
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<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keywordflow">case</span> 0:</div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  ResetInitialPolarity(<span class="comment">/*from=*/</span>0);</div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keywordflow">break</span>;</div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keywordflow">case</span> 1:</div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  UseLongestAssignmentAsInitialPolarity();</div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keywordflow">break</span>;</div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="keywordflow">case</span> 2:</div>
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<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  ResetInitialPolarity(<span class="comment">/*from=*/</span>0, <span class="comment">/*inverted=*/</span><span class="keyword">true</span>);</div>
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<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keywordflow">break</span>;</div>
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<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keywordflow">case</span> 3:</div>
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<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  UseLongestAssignmentAsInitialPolarity();</div>
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<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keywordflow">break</span>;</div>
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<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keywordflow">case</span> 4:</div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  RandomizeCurrentPolarity();</div>
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<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <span class="keywordflow">break</span>;</div>
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<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="keywordflow">case</span> 5:</div>
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<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  UseLongestAssignmentAsInitialPolarity();</div>
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<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="keywordflow">break</span>;</div>
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<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="keywordflow">case</span> 6:</div>
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<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  FlipCurrentPolarity();</div>
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<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keywordflow">break</span>;</div>
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<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keywordflow">case</span> 7:</div>
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<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  UseLongestAssignmentAsInitialPolarity();</div>
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<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keywordflow">break</span>;</div>
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<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  }</div>
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<div class="line"><a name="l00124"></a><span class="lineno"> 124</span> }</div>
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<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  </div>
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<div class="line"><a name="l00126"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#a1dc177ee88f0a7ce2e46a032e5c3cf02"> 126</a></span> <span class="keywordtype">void</span> <a class="code" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#a1dc177ee88f0a7ce2e46a032e5c3cf02">SatDecisionPolicy::ResetDecisionHeuristic</a>() {</div>
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<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> num_variables = activities_.<a class="code" href="classgtl_1_1_i_t_i_vector.html#a60304b65bf89363bcc3165d3cde67f86">size</a>();</div>
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<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  variable_activity_increment_ = 1.0;</div>
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<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  activities_.<a class="code" href="classgtl_1_1_i_t_i_vector.html#a184fe69018ae421dcf31c964bfe40576">assign</a>(num_variables, parameters_.initial_variables_activity());</div>
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<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  tie_breakers_.<a class="code" href="classgtl_1_1_i_t_i_vector.html#a184fe69018ae421dcf31c964bfe40576">assign</a>(num_variables, 0.0);</div>
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<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  num_bumps_.<a class="code" href="classgtl_1_1_i_t_i_vector.html#a184fe69018ae421dcf31c964bfe40576">assign</a>(num_variables, 0);</div>
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<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  var_ordering_.<a class="code" href="classoperations__research_1_1_integer_priority_queue.html#aa71d36872f416feaa853788a7a7a7ef8">Clear</a>();</div>
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<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  </div>
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<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  polarity_phase_ = 0;</div>
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<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  num_conflicts_until_rephase_ = parameters_.polarity_rephase_increment();</div>
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<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  </div>
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<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  ResetInitialPolarity(<span class="comment">/*from=*/</span>0);</div>
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<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  has_target_polarity_.<a class="code" href="classgtl_1_1_i_t_i_vector.html#a184fe69018ae421dcf31c964bfe40576">assign</a>(num_variables, <span class="keyword">false</span>);</div>
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<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  has_forced_polarity_.<a class="code" href="classgtl_1_1_i_t_i_vector.html#a184fe69018ae421dcf31c964bfe40576">assign</a>(num_variables, <span class="keyword">false</span>);</div>
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<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  best_partial_assignment_.clear();</div>
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<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  </div>
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<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  num_conflicts_ = 0;</div>
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<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  num_conflicts_stack_.clear();</div>
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|
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  </div>
|
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<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  var_ordering_is_initialized_ = <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00146"></a><span class="lineno"> 146</span> }</div>
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<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  </div>
|
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<div class="line"><a name="l00148"></a><span class="lineno"> 148</span> <span class="keywordtype">void</span> SatDecisionPolicy::ResetInitialPolarity(<span class="keywordtype">int</span> from, <span class="keywordtype">bool</span> inverted) {</div>
|
|
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <span class="comment">// Sets the initial polarity.</span></div>
|
|
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="comment">//</span></div>
|
|
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="comment">// TODO(user): The WEIGHTED_SIGN one are currently slightly broken because the</span></div>
|
|
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <span class="comment">// weighted_sign_ is updated after this has been called. It requires a call</span></div>
|
|
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <span class="comment">// to ResetDecisionHeuristic() after all the constraint have been added. Fix.</span></div>
|
|
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="comment">// On another hand, this is only used with SolveWithRandomParameters() that</span></div>
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|
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="comment">// does call this function.</span></div>
|
|
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> num_variables = activities_.<a class="code" href="classgtl_1_1_i_t_i_vector.html#a60304b65bf89363bcc3165d3cde67f86">size</a>();</div>
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|
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  <span class="keywordflow">for</span> (BooleanVariable <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>(from); <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> < num_variables; ++<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) {</div>
|
|
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="keywordflow">switch</span> (parameters_.initial_polarity()) {</div>
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|
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  <span class="keywordflow">case</span> SatParameters::POLARITY_TRUE:</div>
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|
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  var_polarity_[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>] = inverted ? false : <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="keywordflow">case</span> SatParameters::POLARITY_FALSE:</div>
|
|
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  var_polarity_[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>] = inverted ? true : <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keywordflow">break</span>;</div>
|
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<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  <span class="keywordflow">case</span> SatParameters::POLARITY_RANDOM:</div>
|
|
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  var_polarity_[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>] = std::uniform_int_distribution<int>(0, 1)(*random_);</div>
|
|
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <span class="keywordflow">case</span> SatParameters::POLARITY_WEIGHTED_SIGN:</div>
|
|
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  var_polarity_[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>] = weighted_sign_[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>] > 0;</div>
|
|
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  <span class="keywordflow">break</span>;</div>
|
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<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  <span class="keywordflow">case</span> SatParameters::POLARITY_REVERSE_WEIGHTED_SIGN:</div>
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|
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  var_polarity_[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>] = weighted_sign_[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>] < 0;</div>
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|
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="keywordflow">break</span>;</div>
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<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  }</div>
|
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<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  }</div>
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<div class="line"><a name="l00176"></a><span class="lineno"> 176</span> }</div>
|
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<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  </div>
|
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<div class="line"><a name="l00178"></a><span class="lineno"> 178</span> <span class="keywordtype">void</span> SatDecisionPolicy::UseLongestAssignmentAsInitialPolarity() {</div>
|
|
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="comment">// In this special case, we just overwrite partially the current fixed</span></div>
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|
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="comment">// polarity and reset the best best_partial_assignment_ for the next such</span></div>
|
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<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  <span class="comment">// phase.</span></div>
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<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> Literal l : best_partial_assignment_) {</div>
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<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  var_polarity_[l.Variable()] = l.IsPositive();</div>
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|
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  }</div>
|
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<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  best_partial_assignment_.<a class="code" href="classgtl_1_1_i_t_i_vector.html#ac8bb3912a3ce86b15842e79d0b421204">clear</a>();</div>
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<div class="line"><a name="l00186"></a><span class="lineno"> 186</span> }</div>
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<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  </div>
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<div class="line"><a name="l00188"></a><span class="lineno"> 188</span> <span class="keywordtype">void</span> SatDecisionPolicy::FlipCurrentPolarity() {</div>
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<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> num_variables = var_polarity_.<a class="code" href="classgtl_1_1_i_t_i_vector.html#a60304b65bf89363bcc3165d3cde67f86">size</a>();</div>
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<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  <span class="keywordflow">for</span> (BooleanVariable <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>; <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> < num_variables; ++<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) {</div>
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<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  var_polarity_[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>] = !var_polarity_[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>];</div>
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<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  }</div>
|
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<div class="line"><a name="l00193"></a><span class="lineno"> 193</span> }</div>
|
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<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  </div>
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<div class="line"><a name="l00195"></a><span class="lineno"> 195</span> <span class="keywordtype">void</span> SatDecisionPolicy::RandomizeCurrentPolarity() {</div>
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|
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> num_variables = var_polarity_.<a class="code" href="classgtl_1_1_i_t_i_vector.html#a60304b65bf89363bcc3165d3cde67f86">size</a>();</div>
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<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  <span class="keywordflow">for</span> (BooleanVariable <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>; <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> < num_variables; ++<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) {</div>
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<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  var_polarity_[<a class="code" 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 name="l00199"></a><span class="lineno"> 199</span>  }</div>
|
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<div class="line"><a name="l00200"></a><span class="lineno"> 200</span> }</div>
|
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<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  </div>
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<div class="line"><a name="l00202"></a><span class="lineno"> 202</span> <span class="keywordtype">void</span> SatDecisionPolicy::InitializeVariableOrdering() {</div>
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|
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> num_variables = activities_.<a class="code" href="classgtl_1_1_i_t_i_vector.html#a60304b65bf89363bcc3165d3cde67f86">size</a>();</div>
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<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  </div>
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<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  <span class="comment">// First, extract the variables without activity, and add the other to the</span></div>
|
|
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  <span class="comment">// priority queue.</span></div>
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<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  var_ordering_.<a class="code" href="classoperations__research_1_1_integer_priority_queue.html#aa71d36872f416feaa853788a7a7a7ef8">Clear</a>();</div>
|
|
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  std::vector<BooleanVariable> variables;</div>
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<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="keywordflow">for</span> (BooleanVariable <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>(0); <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> < num_variables; ++<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) {</div>
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<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  <span class="keywordflow">if</span> (!trail_.<a class="code" href="classoperations__research_1_1sat_1_1_trail.html#a9789bf03dba611e9be5679d6e902d0c8">Assignment</a>().<a class="code" href="classoperations__research_1_1sat_1_1_variables_assignment.html#a49e751eb6f0e9babd957889bb8e7472d">VariableIsAssigned</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) {</div>
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<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="keywordflow">if</span> (activities_[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>] > 0.0) {</div>
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<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  var_ordering_.<a class="code" href="classoperations__research_1_1_integer_priority_queue.html#a260b134ff6e3aa564e8ba1f879aea3d9">Add</a>(</div>
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<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  {<a class="code" 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" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>]), activities_[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>]});</div>
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<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  variables.push_back(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div>
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<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  }</div>
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<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  }</div>
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<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  }</div>
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<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  </div>
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<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  <span class="comment">// Set the order of the other according to the parameters_.</span></div>
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<div class="line"><a name="l00221"></a><span class="lineno"> 221</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 name="l00222"></a><span class="lineno"> 222</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 name="l00223"></a><span class="lineno"> 223</span>  <span class="comment">// which add a big overhead on the priority queue.</span></div>
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<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  <span class="comment">//</span></div>
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<div class="line"><a name="l00225"></a><span class="lineno"> 225</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 name="l00226"></a><span class="lineno"> 226</span>  <span class="keywordflow">switch</span> (parameters_.preferred_variable_order()) {</div>
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<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  <span class="keywordflow">case</span> SatParameters::IN_ORDER:</div>
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<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  <span class="keywordflow">break</span>;</div>
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<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  <span class="keywordflow">case</span> SatParameters::IN_REVERSE_ORDER:</div>
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<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  std::reverse(variables.begin(), variables.end());</div>
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<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  <span class="keywordflow">break</span>;</div>
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<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  <span class="keywordflow">case</span> SatParameters::IN_RANDOM_ORDER:</div>
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<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  std::shuffle(variables.begin(), variables.end(), *random_);</div>
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<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  <span class="keywordflow">break</span>;</div>
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<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  }</div>
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<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  </div>
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<div class="line"><a name="l00237"></a><span class="lineno"> 237</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 name="l00238"></a><span class="lineno"> 238</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> BooleanVariable <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> : variables) {</div>
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<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  var_ordering_.<a class="code" href="classoperations__research_1_1_integer_priority_queue.html#a260b134ff6e3aa564e8ba1f879aea3d9">Add</a>({<a class="code" 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" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>]), 0.0});</div>
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<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  }</div>
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<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  </div>
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<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  <span class="comment">// Finish the queue initialization.</span></div>
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<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  pq_need_update_for_var_at_trail_index_.<a class="code" href="classoperations__research_1_1_bit_queue64.html#ab2fc4510692e040b62507dce522e0e31">ClearAndResize</a>(num_variables);</div>
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<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  pq_need_update_for_var_at_trail_index_.<a class="code" href="classoperations__research_1_1_bit_queue64.html#ad169bc2e89d7b366bfe0ee5d80083c11">SetAllBefore</a>(trail_.<a class="code" href="classoperations__research_1_1sat_1_1_trail.html#a8ef12397d1682615bc3108c397734179">Index</a>());</div>
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<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  var_ordering_is_initialized_ = <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00246"></a><span class="lineno"> 246</span> }</div>
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<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  </div>
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<div class="line"><a name="l00248"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#a955786dcbe82b7c4dc9924a5473ac1e8"> 248</a></span> <span class="keywordtype">void</span> <a class="code" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#a955786dcbe82b7c4dc9924a5473ac1e8">SatDecisionPolicy::SetAssignmentPreference</a>(<a class="code" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a> <a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>,</div>
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<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  <span class="keywordtype">double</span> <a class="code" href="pack_8cc.html#ae42ca38a167164c07831993889216903">weight</a>) {</div>
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<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  <span class="keywordflow">if</span> (!parameters_.use_optimization_hints()) <span class="keywordflow">return</span>;</div>
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<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  DCHECK_GE(<a class="code" href="pack_8cc.html#ae42ca38a167164c07831993889216903">weight</a>, 0.0);</div>
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<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  DCHECK_LE(<a class="code" href="pack_8cc.html#ae42ca38a167164c07831993889216903">weight</a>, 1.0);</div>
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<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  </div>
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<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  has_forced_polarity_[<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>.Variable()] = <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  forced_polarity_[<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>.Variable()] = <a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>.IsPositive();</div>
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<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  </div>
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<div class="line"><a name="l00257"></a><span class="lineno"> 257</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 name="l00258"></a><span class="lineno"> 258</span>  <span class="comment">// Note that this doesn't change the activity though.</span></div>
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<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  tie_breakers_[<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>.Variable()] = <a class="code" href="pack_8cc.html#ae42ca38a167164c07831993889216903">weight</a>;</div>
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<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  var_ordering_is_initialized_ = <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00261"></a><span class="lineno"> 261</span> }</div>
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<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  </div>
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<div class="line"><a name="l00263"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#a0b5d7f31620ad7b364e7415c47ee5e0d"> 263</a></span> std::vector<std::pair<Literal, double>> <a class="code" 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 name="l00264"></a><span class="lineno"> 264</span> <span class="keyword"> const </span>{</div>
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<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  std::vector<std::pair<Literal, double>> prefs;</div>
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<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  <span class="keywordflow">for</span> (BooleanVariable <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>(0); <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> < var_polarity_.<a class="code" href="classgtl_1_1_i_t_i_vector.html#a60304b65bf89363bcc3165d3cde67f86">size</a>(); ++<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) {</div>
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<div class="line"><a name="l00267"></a><span class="lineno"> 267</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 name="l00268"></a><span class="lineno"> 268</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 name="l00269"></a><span class="lineno"> 269</span>  <span class="keyword">const</span> <span class="keywordtype">double</span> <a class="code" href="demon__profiler_8cc.html#a21edc7ca4cc5802c8779d68556bc09cf">value</a> = var_ordering_.<a class="code" href="classoperations__research_1_1_integer_priority_queue.html#a5687a1c992a159e714037bf6ccfa7f4a">GetElement</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>.value()).tie_breaker;</div>
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<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  <span class="keywordflow">if</span> (<a class="code" href="demon__profiler_8cc.html#a21edc7ca4cc5802c8779d68556bc09cf">value</a> > 0.0) {</div>
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<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  prefs.push_back(std::make_pair(<a class="code" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>, var_polarity_[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>]), <a class="code" href="demon__profiler_8cc.html#a21edc7ca4cc5802c8779d68556bc09cf">value</a>));</div>
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<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  }</div>
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<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  }</div>
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<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  <span class="keywordflow">return</span> prefs;</div>
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<div class="line"><a name="l00275"></a><span class="lineno"> 275</span> }</div>
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<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  </div>
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<div class="line"><a name="l00277"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#acf5ac4ce7b95b26c0eadcd6b8cbffe74"> 277</a></span> <span class="keywordtype">void</span> <a class="code" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#acf5ac4ce7b95b26c0eadcd6b8cbffe74">SatDecisionPolicy::UpdateWeightedSign</a>(</div>
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<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  <span class="keyword">const</span> std::vector<LiteralWithCoeff>& terms, Coefficient rhs) {</div>
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<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <a class="code" href="structoperations__research_1_1sat_1_1_literal_with_coeff.html">LiteralWithCoeff</a>& term : terms) {</div>
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<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  <span class="keyword">const</span> <span class="keywordtype">double</span> <a class="code" href="pack_8cc.html#ae42ca38a167164c07831993889216903">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 name="l00281"></a><span class="lineno"> 281</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 name="l00282"></a><span class="lineno"> 282</span>  weighted_sign_[term.literal.Variable()] +=</div>
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<div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  term.literal.IsPositive() ? -<a class="code" href="pack_8cc.html#ae42ca38a167164c07831993889216903">weight</a> : <a class="code" href="pack_8cc.html#ae42ca38a167164c07831993889216903">weight</a>;</div>
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<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  }</div>
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<div class="line"><a name="l00285"></a><span class="lineno"> 285</span> }</div>
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<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  </div>
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<div class="line"><a name="l00287"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#aab615de1a3b2016b0a8b8cdf05e9cf0b"> 287</a></span> <span class="keywordtype">void</span> <a class="code" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#aab615de1a3b2016b0a8b8cdf05e9cf0b">SatDecisionPolicy::BumpVariableActivities</a>(</div>
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<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  <span class="keyword">const</span> std::vector<Literal>& literals) {</div>
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<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  <span class="keywordflow">if</span> (parameters_.use_erwa_heuristic()) {</div>
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<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <a class="code" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a> <a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a> : literals) {</div>
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<div class="line"><a name="l00291"></a><span class="lineno"> 291</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 name="l00292"></a><span class="lineno"> 292</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 name="l00293"></a><span class="lineno"> 293</span>  <span class="comment">// them.</span></div>
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<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  ++num_bumps_[<a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>.Variable()];</div>
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<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  }</div>
|
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<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  <span class="keywordflow">return</span>;</div>
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<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  }</div>
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<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  </div>
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<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  <span class="keyword">const</span> <span class="keywordtype">double</span> max_activity_value = parameters_.max_variable_activity_value();</div>
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<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <a class="code" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a> <a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a> : literals) {</div>
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<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  <span class="keyword">const</span> BooleanVariable <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = <a class="code" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>.Variable();</div>
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<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> level = trail_.<a class="code" href="classoperations__research_1_1sat_1_1_trail.html#a29be1a6b9ba823a6fffb927609d18599">Info</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>).<a class="code" href="structoperations__research_1_1sat_1_1_assignment_info.html#afefd28242df91e46e762af1f7eaf623f">level</a>;</div>
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|
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  <span class="keywordflow">if</span> (level == 0) <span class="keywordflow">continue</span>;</div>
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<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  activities_[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>] += variable_activity_increment_;</div>
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<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  pq_need_update_for_var_at_trail_index_.<a class="code" href="classoperations__research_1_1_bit_queue64.html#a74d1ef67d47fb7f8418e53ec28a14fb3">Set</a>(trail_.<a class="code" href="classoperations__research_1_1sat_1_1_trail.html#a29be1a6b9ba823a6fffb927609d18599">Info</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>).<a class="code" href="structoperations__research_1_1sat_1_1_assignment_info.html#a8843d978bef78a2392a908bd07fffb8e">trail_index</a>);</div>
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<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  <span class="keywordflow">if</span> (activities_[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>] > max_activity_value) {</div>
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<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  RescaleVariableActivities(1.0 / max_activity_value);</div>
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<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  }</div>
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<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  }</div>
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<div class="line"><a name="l00310"></a><span class="lineno"> 310</span> }</div>
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<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  </div>
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<div class="line"><a name="l00312"></a><span class="lineno"> 312</span> <span class="keywordtype">void</span> SatDecisionPolicy::RescaleVariableActivities(<span class="keywordtype">double</span> scaling_factor) {</div>
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<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  variable_activity_increment_ *= scaling_factor;</div>
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<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  <span class="keywordflow">for</span> (BooleanVariable <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>(0); <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> < activities_.<a class="code" href="classgtl_1_1_i_t_i_vector.html#a60304b65bf89363bcc3165d3cde67f86">size</a>(); ++<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) {</div>
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<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  activities_[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>] *= scaling_factor;</div>
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<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  }</div>
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<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  </div>
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<div class="line"><a name="l00318"></a><span class="lineno"> 318</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 name="l00319"></a><span class="lineno"> 319</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 name="l00320"></a><span class="lineno"> 320</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 name="l00321"></a><span class="lineno"> 321</span>  <span class="comment">// already inserted ones.</span></div>
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<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  <span class="comment">//</span></div>
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<div class="line"><a name="l00323"></a><span class="lineno"> 323</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 name="l00324"></a><span class="lineno"> 324</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 name="l00325"></a><span class="lineno"> 325</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 name="l00326"></a><span class="lineno"> 326</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 name="l00327"></a><span class="lineno"> 327</span>  <span class="comment">//</span></div>
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<div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  <span class="comment">// InitializeVariableOrdering() will be called lazily only if needed.</span></div>
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<div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  var_ordering_is_initialized_ = <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00330"></a><span class="lineno"> 330</span> }</div>
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<div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  </div>
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<div class="line"><a name="l00332"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#a8bc0829ef9f6099106cab480e71ab847"> 332</a></span> <span class="keywordtype">void</span> <a class="code" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#a8bc0829ef9f6099106cab480e71ab847">SatDecisionPolicy::UpdateVariableActivityIncrement</a>() {</div>
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<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  variable_activity_increment_ *= 1.0 / parameters_.variable_activity_decay();</div>
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<div class="line"><a name="l00334"></a><span class="lineno"> 334</span> }</div>
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<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  </div>
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<div class="line"><a name="l00336"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#acf014a334d9412c245c083ce69aa8716"> 336</a></span> <a class="code" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a> <a class="code" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#acf014a334d9412c245c083ce69aa8716">SatDecisionPolicy::NextBranch</a>() {</div>
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<div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  <span class="comment">// Lazily initialize var_ordering_ if needed.</span></div>
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<div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  <span class="keywordflow">if</span> (!var_ordering_is_initialized_) {</div>
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<div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  InitializeVariableOrdering();</div>
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<div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  }</div>
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<div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  </div>
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<div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  <span class="comment">// Choose the variable.</span></div>
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<div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  BooleanVariable <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>;</div>
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<div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  <span class="keyword">const</span> <span class="keywordtype">double</span> <a class="code" href="revised__simplex_8cc.html#af01c50e388647c921aa7d9c77f2b72b2">ratio</a> = parameters_.random_branches_ratio();</div>
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<div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  <span class="keyword">auto</span> zero_to_one = [<span class="keyword">this</span>]() {</div>
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<div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  <span class="keywordflow">return</span> std::uniform_real_distribution<double>()(*random_);</div>
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<div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  };</div>
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<div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  <span class="keywordflow">if</span> (<a class="code" href="revised__simplex_8cc.html#af01c50e388647c921aa7d9c77f2b72b2">ratio</a> != 0.0 && zero_to_one() < <a class="code" href="revised__simplex_8cc.html#af01c50e388647c921aa7d9c77f2b72b2">ratio</a>) {</div>
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<div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  <span class="keywordflow">while</span> (<span class="keyword">true</span>) {</div>
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<div class="line"><a name="l00350"></a><span class="lineno"> 350</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 name="l00351"></a><span class="lineno"> 351</span>  <span class="comment">// variables are assigned.</span></div>
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<div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  std::uniform_int_distribution<int> index_dist(0,</div>
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<div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  var_ordering_.<a class="code" href="classoperations__research_1_1_integer_priority_queue.html#a24926108b770033792d015cb86aeffb3">Size</a>() - 1);</div>
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<div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = var_ordering_.<a class="code" href="classoperations__research_1_1_integer_priority_queue.html#a0881dd4925133cfdf55468935ba384a4">QueueElement</a>(index_dist(*random_)).var;</div>
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<div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  <span class="keywordflow">if</span> (!trail_.<a class="code" href="classoperations__research_1_1sat_1_1_trail.html#a9789bf03dba611e9be5679d6e902d0c8">Assignment</a>().<a class="code" href="classoperations__research_1_1sat_1_1_variables_assignment.html#a49e751eb6f0e9babd957889bb8e7472d">VariableIsAssigned</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) <span class="keywordflow">break</span>;</div>
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<div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  pq_need_update_for_var_at_trail_index_.<a class="code" href="classoperations__research_1_1_bit_queue64.html#a74d1ef67d47fb7f8418e53ec28a14fb3">Set</a>(trail_.<a class="code" href="classoperations__research_1_1sat_1_1_trail.html#a29be1a6b9ba823a6fffb927609d18599">Info</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>).<a class="code" href="structoperations__research_1_1sat_1_1_assignment_info.html#a8843d978bef78a2392a908bd07fffb8e">trail_index</a>);</div>
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<div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  var_ordering_.<a class="code" href="classoperations__research_1_1_integer_priority_queue.html#a50af808bf213e4cb397f5f458af96cb5">Remove</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>.value());</div>
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<div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  }</div>
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<div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00360"></a><span class="lineno"> 360</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 name="l00361"></a><span class="lineno"> 361</span>  DCHECK(!var_ordering_.<a class="code" href="classoperations__research_1_1_integer_priority_queue.html#a8e12342fc420701fbffd97025421575a">IsEmpty</a>());</div>
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<div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = var_ordering_.<a class="code" href="classoperations__research_1_1_integer_priority_queue.html#a8f1cb7a5e2de2945a3dcecd15a09a0a4">Top</a>().var;</div>
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<div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  <span class="keywordflow">while</span> (trail_.<a class="code" href="classoperations__research_1_1sat_1_1_trail.html#a9789bf03dba611e9be5679d6e902d0c8">Assignment</a>().<a class="code" href="classoperations__research_1_1sat_1_1_variables_assignment.html#a49e751eb6f0e9babd957889bb8e7472d">VariableIsAssigned</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)) {</div>
|
|
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  var_ordering_.<a class="code" href="classoperations__research_1_1_integer_priority_queue.html#a701a584ce72cccbcce9cb0656b6c898b">Pop</a>();</div>
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|
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  pq_need_update_for_var_at_trail_index_.<a class="code" href="classoperations__research_1_1_bit_queue64.html#a74d1ef67d47fb7f8418e53ec28a14fb3">Set</a>(trail_.<a class="code" href="classoperations__research_1_1sat_1_1_trail.html#a29be1a6b9ba823a6fffb927609d18599">Info</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>).<a class="code" href="structoperations__research_1_1sat_1_1_assignment_info.html#a8843d978bef78a2392a908bd07fffb8e">trail_index</a>);</div>
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|
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  DCHECK(!var_ordering_.<a class="code" href="classoperations__research_1_1_integer_priority_queue.html#a8e12342fc420701fbffd97025421575a">IsEmpty</a>());</div>
|
|
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = var_ordering_.<a class="code" href="classoperations__research_1_1_integer_priority_queue.html#a8f1cb7a5e2de2945a3dcecd15a09a0a4">Top</a>().var;</div>
|
|
<div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  }</div>
|
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<div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  }</div>
|
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<div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  </div>
|
|
<div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  <span class="comment">// Choose its polarity (i.e. True of False).</span></div>
|
|
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  <span class="keyword">const</span> <span class="keywordtype">double</span> random_ratio = parameters_.random_polarity_ratio();</div>
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|
<div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  <span class="keywordflow">if</span> (random_ratio != 0.0 && zero_to_one() < random_ratio) {</div>
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<div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  <span class="keywordflow">return</span> <a class="code" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a>(<a class="code" 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 name="l00375"></a><span class="lineno"> 375</span>  }</div>
|
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<div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  </div>
|
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<div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  <span class="keywordflow">if</span> (has_forced_polarity_[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>]) <span class="keywordflow">return</span> <a class="code" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>, forced_polarity_[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>]);</div>
|
|
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  <span class="keywordflow">if</span> (in_stable_phase_ && has_target_polarity_[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>]) {</div>
|
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<div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  <span class="keywordflow">return</span> <a class="code" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>, target_polarity_[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>]);</div>
|
|
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  }</div>
|
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<div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  <span class="keywordflow">return</span> <a class="code" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>, var_polarity_[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>]);</div>
|
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<div class="line"><a name="l00382"></a><span class="lineno"> 382</span> }</div>
|
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<div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  </div>
|
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<div class="line"><a name="l00384"></a><span class="lineno"> 384</span> <span class="keywordtype">void</span> SatDecisionPolicy::PqInsertOrUpdate(BooleanVariable <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>) {</div>
|
|
<div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  <span class="keyword">const</span> WeightedVarQueueElement element{</div>
|
|
<div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  <a class="code" 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" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>]), activities_[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>]};</div>
|
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<div class="line"><a name="l00387"></a><span class="lineno"> 387</span>  <span class="keywordflow">if</span> (var_ordering_.<a class="code" href="classoperations__research_1_1_integer_priority_queue.html#a06fe50b32a75c0a071b68ebbacb8f681">Contains</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>.value())) {</div>
|
|
<div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  <span class="comment">// Note that the new weight should always be higher than the old one.</span></div>
|
|
<div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  var_ordering_.<a class="code" href="classoperations__research_1_1_integer_priority_queue.html#a476176e5749d53acadc6d3ef6a3b5e61">IncreasePriority</a>(element);</div>
|
|
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  var_ordering_.<a class="code" href="classoperations__research_1_1_integer_priority_queue.html#a260b134ff6e3aa564e8ba1f879aea3d9">Add</a>(element);</div>
|
|
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  }</div>
|
|
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span> }</div>
|
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<div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  </div>
|
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<div class="line"><a name="l00395"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#aa62b9215667a0b7dc6af8251dbaba486"> 395</a></span> <span class="keywordtype">void</span> <a class="code" href="classoperations__research_1_1sat_1_1_sat_decision_policy.html#aa62b9215667a0b7dc6af8251dbaba486">SatDecisionPolicy::Untrail</a>(<span class="keywordtype">int</span> target_trail_index) {</div>
|
|
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  <span class="comment">// TODO(user): avoid looping twice over the trail?</span></div>
|
|
<div class="line"><a name="l00397"></a><span class="lineno"> 397</span>  <span class="keywordflow">if</span> (maybe_enable_phase_saving_ && parameters_.use_phase_saving()) {</div>
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|
<div class="line"><a name="l00398"></a><span class="lineno"> 398</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = target_trail_index; i < trail_.<a class="code" href="classoperations__research_1_1sat_1_1_trail.html#a8ef12397d1682615bc3108c397734179">Index</a>(); ++i) {</div>
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<div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  <span class="keyword">const</span> <a class="code" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a> l = trail_[i];</div>
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<div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  var_polarity_[l.<a class="code" href="classoperations__research_1_1sat_1_1_literal.html#a6a5dcff82096cd7a7147bf996dbaa5a8">Variable</a>()] = l.<a class="code" href="classoperations__research_1_1sat_1_1_literal.html#ab76ca9049d6f3f1948d7120a98765107">IsPositive</a>();</div>
|
|
<div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  }</div>
|
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<div class="line"><a name="l00402"></a><span class="lineno"> 402</span>  }</div>
|
|
<div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  </div>
|
|
<div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  DCHECK_LT(target_trail_index, trail_.<a class="code" href="classoperations__research_1_1sat_1_1_trail.html#a8ef12397d1682615bc3108c397734179">Index</a>());</div>
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|
<div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  <span class="keywordflow">if</span> (parameters_.use_erwa_heuristic()) {</div>
|
|
<div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  <span class="comment">// The ERWA parameter between the new estimation of the learning rate and</span></div>
|
|
<div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  <span class="comment">// the old one. TODO(user): Expose parameters for these values.</span></div>
|
|
<div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  <span class="keyword">const</span> <span class="keywordtype">double</span> alpha = <a class="code" href="alldiff__cst_8cc.html#a9d0c202d5fdd62f4fa2c613339ff168a">std::max</a>(0.06, 0.4 - 1e-6 * num_conflicts_);</div>
|
|
<div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  </div>
|
|
<div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  <span class="comment">// This counts the number of conflicts since the assignment of the variable</span></div>
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<div class="line"><a name="l00411"></a><span class="lineno"> 411</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 name="l00412"></a><span class="lineno"> 412</span>  <span class="keywordtype">int</span> num_conflicts = 0;</div>
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<div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  <span class="keywordtype">int</span> next_num_conflicts_update =</div>
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<div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  num_conflicts_stack_.empty() ? -1</div>
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<div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  : num_conflicts_stack_.back().trail_index;</div>
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<div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  </div>
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<div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  <span class="keywordtype">int</span> trail_index = trail_.<a class="code" href="classoperations__research_1_1sat_1_1_trail.html#a8ef12397d1682615bc3108c397734179">Index</a>();</div>
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<div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  <span class="keywordflow">while</span> (trail_index > target_trail_index) {</div>
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<div class="line"><a name="l00419"></a><span class="lineno"> 419</span>  <span class="keywordflow">if</span> (next_num_conflicts_update == trail_index) {</div>
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<div class="line"><a name="l00420"></a><span class="lineno"> 420</span>  num_conflicts += num_conflicts_stack_.back().count;</div>
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<div class="line"><a name="l00421"></a><span class="lineno"> 421</span>  num_conflicts_stack_.pop_back();</div>
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<div class="line"><a name="l00422"></a><span class="lineno"> 422</span>  next_num_conflicts_update =</div>
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<div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  num_conflicts_stack_.empty()</div>
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<div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  ? -1</div>
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<div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  : num_conflicts_stack_.back().trail_index;</div>
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<div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  }</div>
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<div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  <span class="keyword">const</span> BooleanVariable <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = trail_[--trail_index].Variable();</div>
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<div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  </div>
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<div class="line"><a name="l00429"></a><span class="lineno"> 429</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 name="l00430"></a><span class="lineno"> 430</span>  <span class="comment">// all the untrailed variable will cause a priority queue update.</span></div>
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<div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  <span class="keyword">const</span> <a class="code" href="integral__types_8h.html#a7cde0074dfd288f2d70c0e035dacb28a">int64</a> num_bumps = num_bumps_[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>];</div>
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<div class="line"><a name="l00432"></a><span class="lineno"> 432</span>  <span class="keywordtype">double</span> new_rate = 0.0;</div>
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<div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  <span class="keywordflow">if</span> (num_bumps > 0) {</div>
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<div class="line"><a name="l00434"></a><span class="lineno"> 434</span>  DCHECK_GT(num_conflicts, 0);</div>
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<div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  num_bumps_[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>] = 0;</div>
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<div class="line"><a name="l00436"></a><span class="lineno"> 436</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 name="l00437"></a><span class="lineno"> 437</span>  }</div>
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<div class="line"><a name="l00438"></a><span class="lineno"> 438</span>  activities_[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>] = alpha * new_rate + (1 - alpha) * activities_[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>];</div>
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<div class="line"><a name="l00439"></a><span class="lineno"> 439</span>  <span class="keywordflow">if</span> (var_ordering_is_initialized_) PqInsertOrUpdate(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>);</div>
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<div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  }</div>
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<div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  <span class="keywordflow">if</span> (num_conflicts > 0) {</div>
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<div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  <span class="keywordflow">if</span> (!num_conflicts_stack_.empty() &&</div>
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<div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  num_conflicts_stack_.back().trail_index == trail_.<a class="code" href="classoperations__research_1_1sat_1_1_trail.html#a8ef12397d1682615bc3108c397734179">Index</a>()) {</div>
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<div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  num_conflicts_stack_.back().count += num_conflicts;</div>
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|
<div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  } <span class="keywordflow">else</span> {</div>
|
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<div class="line"><a name="l00446"></a><span class="lineno"> 446</span>  num_conflicts_stack_.push_back({trail_.<a class="code" href="classoperations__research_1_1sat_1_1_trail.html#a8ef12397d1682615bc3108c397734179">Index</a>(), num_conflicts});</div>
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<div class="line"><a name="l00447"></a><span class="lineno"> 447</span>  }</div>
|
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<div class="line"><a name="l00448"></a><span class="lineno"> 448</span>  }</div>
|
|
<div class="line"><a name="l00449"></a><span class="lineno"> 449</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00450"></a><span class="lineno"> 450</span>  <span class="keywordflow">if</span> (!var_ordering_is_initialized_) <span class="keywordflow">return</span>;</div>
|
|
<div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  </div>
|
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<div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  <span class="comment">// Trail index of the next variable that will need a priority queue update.</span></div>
|
|
<div class="line"><a name="l00453"></a><span class="lineno"> 453</span>  <span class="keywordtype">int</span> to_update = pq_need_update_for_var_at_trail_index_.<a class="code" href="classoperations__research_1_1_bit_queue64.html#a2edc7a62aaf90213f6c5f765242d6488">Top</a>();</div>
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|
<div class="line"><a name="l00454"></a><span class="lineno"> 454</span>  <span class="keywordflow">while</span> (to_update >= target_trail_index) {</div>
|
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<div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  DCHECK_LT(to_update, trail_.<a class="code" href="classoperations__research_1_1sat_1_1_trail.html#a8ef12397d1682615bc3108c397734179">Index</a>());</div>
|
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<div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  PqInsertOrUpdate(trail_[to_update].Variable());</div>
|
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<div class="line"><a name="l00457"></a><span class="lineno"> 457</span>  pq_need_update_for_var_at_trail_index_.<a class="code" href="classoperations__research_1_1_bit_queue64.html#a704ec3ccc1510e90b041a92a0e04b71c">ClearTop</a>();</div>
|
|
<div class="line"><a name="l00458"></a><span class="lineno"> 458</span>  to_update = pq_need_update_for_var_at_trail_index_.<a class="code" href="classoperations__research_1_1_bit_queue64.html#a2edc7a62aaf90213f6c5f765242d6488">Top</a>();</div>
|
|
<div class="line"><a name="l00459"></a><span class="lineno"> 459</span>  }</div>
|
|
<div class="line"><a name="l00460"></a><span class="lineno"> 460</span>  }</div>
|
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<div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  </div>
|
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<div class="line"><a name="l00462"></a><span class="lineno"> 462</span>  <span class="comment">// Invariant.</span></div>
|
|
<div class="line"><a name="l00463"></a><span class="lineno"> 463</span>  <span class="keywordflow">if</span> (<a class="code" href="macros_8h.html#a7f536a3b33f9bed8f75734e035d30725">DEBUG_MODE</a> && var_ordering_is_initialized_) {</div>
|
|
<div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> trail_index = trail_.<a class="code" href="classoperations__research_1_1sat_1_1_trail.html#a8ef12397d1682615bc3108c397734179">Index</a>() - 1; trail_index > target_trail_index;</div>
|
|
<div class="line"><a name="l00465"></a><span class="lineno"> 465</span>  --trail_index) {</div>
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<div class="line"><a name="l00466"></a><span class="lineno"> 466</span>  <span class="keyword">const</span> BooleanVariable <a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> = trail_[trail_index].Variable();</div>
|
|
<div class="line"><a name="l00467"></a><span class="lineno"> 467</span>  CHECK(var_ordering_.<a class="code" href="classoperations__research_1_1_integer_priority_queue.html#a06fe50b32a75c0a071b68ebbacb8f681">Contains</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>.value()));</div>
|
|
<div class="line"><a name="l00468"></a><span class="lineno"> 468</span>  CHECK_EQ(activities_[<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>], var_ordering_.<a class="code" href="classoperations__research_1_1_integer_priority_queue.html#a5687a1c992a159e714037bf6ccfa7f4a">GetElement</a>(<a class="code" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>.value()).weight);</div>
|
|
<div class="line"><a name="l00469"></a><span class="lineno"> 469</span>  }</div>
|
|
<div class="line"><a name="l00470"></a><span class="lineno"> 470</span>  }</div>
|
|
<div class="line"><a name="l00471"></a><span class="lineno"> 471</span> }</div>
|
|
<div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  </div>
|
|
<div class="line"><a name="l00473"></a><span class="lineno"> 473</span> } <span class="comment">// namespace sat</span></div>
|
|
<div class="line"><a name="l00474"></a><span class="lineno"> 474</span> } <span class="comment">// namespace operations_research</span></div>
|
|
</div><!-- fragment --></div><!-- contents -->
|
|
</div><!-- doc-content -->
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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#l00703">bitset.h:703</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#l01858">expr_array.cc:1858</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#l00080">sat_base.h:80</a></div></div>
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<div class="ttc" id="aalldiff__cst_8cc_html_a9d0c202d5fdd62f4fa2c613339ff168a"><div class="ttname"><a href="alldiff__cst_8cc.html#a9d0c202d5fdd62f4fa2c613339ff168a">max</a></div><div class="ttdeci">int64 max</div><div class="ttdef"><b>Definition:</b> <a href="alldiff__cst_8cc_source.html#l00139">alldiff_cst.cc:139</a></div></div>
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<div class="ttc" id="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#l00395">sat_decision.cc:395</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#l00336">sat_decision.cc:336</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_integer_priority_queue_html_a24926108b770033792d015cb86aeffb3"><div class="ttname"><a href="classoperations__research_1_1_integer_priority_queue.html#a24926108b770033792d015cb86aeffb3">operations_research::IntegerPriorityQueue::Size</a></div><div class="ttdeci">int Size() const</div><div class="ttdef"><b>Definition:</b> <a href="integer__pq_8h_source.html#l00056">integer_pq.h:56</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#l00026">sat_decision.cc:26</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_integer_priority_queue_html_a476176e5749d53acadc6d3ef6a3b5e61"><div class="ttname"><a href="classoperations__research_1_1_integer_priority_queue.html#a476176e5749d53acadc6d3ef6a3b5e61">operations_research::IntegerPriorityQueue::IncreasePriority</a></div><div class="ttdeci">void IncreasePriority(Element element)</div><div class="ttdef"><b>Definition:</b> <a href="integer__pq_8h_source.html#l00116">integer_pq.h:116</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_integer_priority_queue_html_a5687a1c992a159e714037bf6ccfa7f4a"><div class="ttname"><a href="classoperations__research_1_1_integer_priority_queue.html#a5687a1c992a159e714037bf6ccfa7f4a">operations_research::IntegerPriorityQueue::GetElement</a></div><div class="ttdeci">Element GetElement(int index) const</div><div class="ttdef"><b>Definition:</b> <a href="integer__pq_8h_source.html#l00124">integer_pq.h:124</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_trail_html_a29be1a6b9ba823a6fffb927609d18599"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_trail.html#a29be1a6b9ba823a6fffb927609d18599">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#l00381">sat_base.h:381</a></div></div>
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<div class="ttc" id="astructoperations__research_1_1sat_1_1_model_random_generator_html"><div class="ttname"><a href="structoperations__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#l00033">sat/util.h:33</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#l00263">sat_decision.cc:263</a></div></div>
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<div class="ttc" id="ademon__profiler_8cc_html_a21edc7ca4cc5802c8779d68556bc09cf"><div class="ttname"><a href="demon__profiler_8cc.html#a21edc7ca4cc5802c8779d68556bc09cf">value</a></div><div class="ttdeci">int64 value</div><div class="ttdef"><b>Definition:</b> <a href="demon__profiler_8cc_source.html#l00043">demon_profiler.cc:43</a></div></div>
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<div class="ttc" id="apack_8cc_html_ae42ca38a167164c07831993889216903"><div class="ttname"><a href="pack_8cc.html#ae42ca38a167164c07831993889216903">weight</a></div><div class="ttdeci">int64 weight</div><div class="ttdef"><b>Definition:</b> <a href="pack_8cc_source.html#l00509">pack.cc:509</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_integer_priority_queue_html_aa71d36872f416feaa853788a7a7a7ef8"><div class="ttname"><a href="classoperations__research_1_1_integer_priority_queue.html#aa71d36872f416feaa853788a7a7a7ef8">operations_research::IntegerPriorityQueue::Clear</a></div><div class="ttdeci">void Clear()</div><div class="ttdef"><b>Definition:</b> <a href="integer__pq_8h_source.html#l00061">integer_pq.h:61</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_integer_priority_queue_html_a06fe50b32a75c0a071b68ebbacb8f681"><div class="ttname"><a href="classoperations__research_1_1_integer_priority_queue.html#a06fe50b32a75c0a071b68ebbacb8f681">operations_research::IntegerPriorityQueue::Contains</a></div><div class="ttdeci">bool Contains(int index) const</div><div class="ttdef"><b>Definition:</b> <a href="integer__pq_8h_source.html#l00067">integer_pq.h:67</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">The vehicle routing library lets one model and solve generic vehicle routing problems ranging from th...</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="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="aclassoperations__research_1_1_integer_priority_queue_html_a8f1cb7a5e2de2945a3dcecd15a09a0a4"><div class="ttname"><a href="classoperations__research_1_1_integer_priority_queue.html#a8f1cb7a5e2de2945a3dcecd15a09a0a4">operations_research::IntegerPriorityQueue::Top</a></div><div class="ttdeci">Element Top() const</div><div class="ttdef"><b>Definition:</b> <a href="integer__pq_8h_source.html#l00078">integer_pq.h:78</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_integer_priority_queue_html_a8e12342fc420701fbffd97025421575a"><div class="ttname"><a href="classoperations__research_1_1_integer_priority_queue.html#a8e12342fc420701fbffd97025421575a">operations_research::IntegerPriorityQueue::IsEmpty</a></div><div class="ttdeci">bool IsEmpty() const</div><div class="ttdef"><b>Definition:</b> <a href="integer__pq_8h_source.html#l00057">integer_pq.h:57</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#l00248">sat_decision.cc:248</a></div></div>
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<div class="ttc" id="aintegral__types_8h_html_a7cde0074dfd288f2d70c0e035dacb28a"><div class="ttname"><a href="integral__types_8h.html#a7cde0074dfd288f2d70c0e035dacb28a">int64</a></div><div class="ttdeci">int64_t int64</div><div class="ttdef"><b>Definition:</b> <a href="integral__types_8h_source.html#l00034">integral_types.h:34</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#l00723">bitset.h:723</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#l00726">bitset.h:726</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#l00378">sat_base.h:378</a></div></div>
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<div class="ttc" id="astructoperations__research_1_1sat_1_1_assignment_info_html_a8843d978bef78a2392a908bd07fffb8e"><div class="ttname"><a href="structoperations__research_1_1sat_1_1_assignment_info.html#a8843d978bef78a2392a908bd07fffb8e">operations_research::sat::AssignmentInfo::trail_index</a></div><div class="ttdeci">int32 trail_index</div><div class="ttdef"><b>Definition:</b> <a href="sat__base_8h_source.html#l00208">sat_base.h:208</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#l01793">revised_simplex.cc:1793</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="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#l00126">sat_decision.cc:126</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#l00697">bitset.h:697</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_trail_html_a9789bf03dba611e9be5679d6e902d0c8"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_trail.html#a9789bf03dba611e9be5679d6e902d0c8">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#l00380">sat_base.h:380</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_1_integer_priority_queue_html_a21cecbc35e3da9931f94afa3229354dc"><div class="ttname"><a href="classoperations__research_1_1_integer_priority_queue.html#a21cecbc35e3da9931f94afa3229354dc">operations_research::IntegerPriorityQueue::Reserve</a></div><div class="ttdeci">void Reserve(int n)</div><div class="ttdef"><b>Definition:</b> <a href="integer__pq_8h_source.html#l00048">integer_pq.h:48</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#l00021">sat_decision.cc:21</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#l00277">sat_decision.cc:277</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#l00691">bitset.h:691</a></div></div>
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<div class="ttc" id="aclassgtl_1_1_i_t_i_vector_html_a60304b65bf89363bcc3165d3cde67f86"><div class="ttname"><a href="classgtl_1_1_i_t_i_vector.html#a60304b65bf89363bcc3165d3cde67f86">gtl::ITIVector::size</a></div><div class="ttdeci">size_type size() const</div><div class="ttdef"><b>Definition:</b> <a href="int__type__indexed__vector_8h_source.html#l00146">int_type_indexed_vector.h:146</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#l00195">gurobi_interface.cc:195</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#l00064">sat_base.h:64</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#l00711">bitset.h:711</a></div></div>
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<div class="ttc" id="astructoperations__research_1_1sat_1_1_assignment_info_html_afefd28242df91e46e762af1f7eaf623f"><div class="ttname"><a href="structoperations__research_1_1sat_1_1_assignment_info.html#afefd28242df91e46e762af1f7eaf623f">operations_research::sat::AssignmentInfo::level</a></div><div class="ttdeci">uint32 level</div><div class="ttdef"><b>Definition:</b> <a href="sat__base_8h_source.html#l00199">sat_base.h:199</a></div></div>
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<div class="ttc" id="aclassgtl_1_1_i_t_i_vector_html_ac8bb3912a3ce86b15842e79d0b421204"><div class="ttname"><a href="classgtl_1_1_i_t_i_vector.html#ac8bb3912a3ce86b15842e79d0b421204">gtl::ITIVector::clear</a></div><div class="ttdeci">void clear()</div><div class="ttdef"><b>Definition:</b> <a href="int__type__indexed__vector_8h_source.html#l00169">int_type_indexed_vector.h:169</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="aclassoperations__research_1_1_integer_priority_queue_html_a0881dd4925133cfdf55468935ba384a4"><div class="ttname"><a href="classoperations__research_1_1_integer_priority_queue.html#a0881dd4925133cfdf55468935ba384a4">operations_research::IntegerPriorityQueue::QueueElement</a></div><div class="ttdeci">Element QueueElement(int i) const</div><div class="ttdef"><b>Definition:</b> <a href="integer__pq_8h_source.html#l00128">integer_pq.h:128</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_integer_priority_queue_html_a50af808bf213e4cb397f5f458af96cb5"><div class="ttname"><a href="classoperations__research_1_1_integer_priority_queue.html#a50af808bf213e4cb397f5f458af96cb5">operations_research::IntegerPriorityQueue::Remove</a></div><div class="ttdeci">void Remove(int index)</div><div class="ttdef"><b>Definition:</b> <a href="integer__pq_8h_source.html#l00088">integer_pq.h:88</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_integer_priority_queue_html_a260b134ff6e3aa564e8ba1f879aea3d9"><div class="ttname"><a href="classoperations__research_1_1_integer_priority_queue.html#a260b134ff6e3aa564e8ba1f879aea3d9">operations_research::IntegerPriorityQueue::Add</a></div><div class="ttdeci">void Add(Element element)</div><div class="ttdef"><b>Definition:</b> <a href="integer__pq_8h_source.html#l00071">integer_pq.h:71</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#l00049">pb_constraint.h:49</a></div></div>
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<div class="ttc" id="aclassgtl_1_1_i_t_i_vector_html_a4e3670a285a3642eaa07f66766cffa72"><div class="ttname"><a href="classgtl_1_1_i_t_i_vector.html#a4e3670a285a3642eaa07f66766cffa72">gtl::ITIVector::resize</a></div><div class="ttdeci">void resize(size_type new_size)</div><div class="ttdef"><b>Definition:</b> <a href="int__type__indexed__vector_8h_source.html#l00149">int_type_indexed_vector.h:149</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#l00158">sat_base.h:158</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#l00287">sat_decision.cc:287</a></div></div>
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<div class="ttc" id="aclassgtl_1_1_i_t_i_vector_html_a184fe69018ae421dcf31c964bfe40576"><div class="ttname"><a href="classgtl_1_1_i_t_i_vector.html#a184fe69018ae421dcf31c964bfe40576">gtl::ITIVector::assign</a></div><div class="ttdeci">void assign(size_type n, const value_type &val)</div><div class="ttdef"><b>Definition:</b> <a href="int__type__indexed__vector_8h_source.html#l00130">int_type_indexed_vector.h:130</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#l00084">optimization.cc:84</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#l00081">sat_base.h:81</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_integer_priority_queue_html_a701a584ce72cccbcce9cb0656b6c898b"><div class="ttname"><a href="classoperations__research_1_1_integer_priority_queue.html#a701a584ce72cccbcce9cb0656b6c898b">operations_research::IntegerPriorityQueue::Pop</a></div><div class="ttdeci">void Pop()</div><div class="ttdef"><b>Definition:</b> <a href="integer__pq_8h_source.html#l00079">integer_pq.h:79</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#l00055">sat_decision.cc:55</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#l00233">sat_base.h:233</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#l00332">sat_decision.cc:332</a></div></div>
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