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<a href="xchaff__solver_8cpp.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">/* =========FOR INTERNAL USE ONLY. NO DISTRIBUTION PLEASE ========== */</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> </div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">/*********************************************************************</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> Copyright 2000-2001, Princeton University. All rights reserved. </span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> By using this software the USER indicates that he or she has read, </span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> understood and will comply with the following:</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"></span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> --- Princeton University hereby grants USER nonexclusive permission </span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> to use, copy and/or modify this software for internal, noncommercial,</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> research purposes only. Any distribution, including commercial sale </span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> or license, of this software, copies of the software, its associated </span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> documentation and/or modifications of either is strictly prohibited </span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> without the prior consent of Princeton University. Title to copyright</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> to this software and its associated documentation shall at all times </span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> remain with Princeton University. Appropriate copyright notice shall </span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> be placed on all software copies, and a complete copy of this notice </span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> shall be included in all copies of the associated documentation. </span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> No right is granted to use in advertising, publicity or otherwise </span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> any trademark, service mark, or the name of Princeton University. </span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"></span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"></span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"> --- This software and any associated documentation is provided "as is" </span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"></span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> PRINCETON UNIVERSITY MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS </span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> OR IMPLIED, INCLUDING THOSE OF MERCHANTABILITY OR FITNESS FOR A </span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> PARTICULAR PURPOSE, OR THAT USE OF THE SOFTWARE, MODIFICATIONS, OR </span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> ASSOCIATED DOCUMENTATION WILL NOT INFRINGE ANY PATENTS, COPYRIGHTS, </span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment"> TRADEMARKS OR OTHER INTELLECTUAL PROPERTY RIGHTS OF A THIRD PARTY. </span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment"></span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment"> Princeton University shall not be liable under any circumstances for </span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment"> any direct, indirect, special, incidental, or consequential damages </span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment"> with respect to any claim by USER or any third party on account of </span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment"> or arising from the use, or inability to use, this software or its </span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment"> associated documentation, even if Princeton University has been advised</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment"> of the possibility of those damages.</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment">*********************************************************************/</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> </div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> </div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="preprocessor">#include "<a class="code" href="xchaff__solver_8h.html">xchaff_solver.h</a>"</span></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="preprocessor">#include <algorithm></span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> </div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> </div>
<div class="line"><a name="l00043"></a><span class="lineno"><a class="code" href="classCSolver.html#afa1c51e0570e7a835fae6ba187f9d09b"> 43</a></span> <a class="code" href="classCSolver.html#afa1c51e0570e7a835fae6ba187f9d09b">CSolver::CSolver</a>(<span class="keywordtype">void</span>) </div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> {</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <a class="code" href="classCSolver.html#ad51e4ee566b488f8d3610890f3fa1bb7">dlevel</a>()=0;</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a1904f8790a16c706e0d2ba51ce11c364">time_limit</a> = 3600 * 48; <span class="comment">//2 days</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#aa5fb349b73577a3b99014ca90ce34e55">decision_strategy</a> = 0;</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a714385448e9041b135391f9548ed6efa">preprocess_strategy</a> = 0;</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#aa4c80dc600b3dcd9f64ef0c602dd59da">allow_clause_deletion</a> = true ;</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a5cbdbad62f42fd6f41ba5a4ed6f40af6">clause_deletion_interval</a> = 5000;</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a97c37504943c58e8cf1afc406018b027">max_unrelevance</a> = 20;</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a8747b9ca39f6cf7312f081d223634194">min_num_clause_lits_for_delete</a> = 100;</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#af82455d9df59584dbf9f400cf6f918b1">max_conflict_clause_length</a> = 5000;</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#ae358e7fe29489f48a00c012fb02a3778">bubble_init_step</a> = 32;</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> </div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a2c4888b23c0f7ea4a3a2ec654ddf83b5">randomness</a> = 0;</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#adaaa1d95214368e99b13ac36cbb16dea">verbosity</a> = 0;</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> </div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a3e90abca92fa570f9d1dc5ce49b01daa">back_track_complete</a> = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a4543f7d64cbab749e5e1998b83d1e1d2">allow_multiple_conflict</a> = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a9d1be4fd22f1ee134702028a980c2d1b">allow_multiple_conflict_clause</a> = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> </div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a0040f5ae79dd7e8a478f60f3d02b1a6d">allow_restart</a> = <span class="keyword">true</span>; </div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a4fec1add4989095c31fab9ec2a29f824">next_restart_time</a> = 50; <span class="comment">//this set the first restart time (in seconds)</span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a22f43c87a3a8cdfdfd35bd400f3f0b59">restart_time_increment</a> = 0;</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a914448885e9e2aedefd743f6428552d8">restart_time_incr_incr</a> = 0;</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> </div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#ac1a694498478fc1c1e164e81881ea61f">next_restart_backtrack</a>= 0;</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a319ab0a9a6646af75828ff1a1f9a33b6">restart_backtrack_incr</a>= 40000; </div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a8b11bde6fb341437589e70a1b419d846">restart_backtrack_incr_incr</a> = 100;</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> </div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#ac22c8353981fed418be2df36b64e635e">restart_randomness</a> = 0; </div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#adde3fd4026e6ce1a5598ac2766326e04">base_randomness</a> = 0;</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a2c4888b23c0f7ea4a3a2ec654ddf83b5">randomness</a> = 0;</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> </div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#ae8963018c0dcb967130c5d9867922b4d">is_solver_started</a> = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#a457807a12c793c4ff53a56aefe246d51">outcome</a> = <a class="code" href="xchaff__base_8h.html#a915d220aba4527d1e33010bdfcbc6855a6ce26a62afab55d7606ad4e92428b30c">UNKNOWN</a>;</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#ab5c8d00ed96f235136c96197230a09c7">is_mem_out</a> = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#acf5b03d1d0c79232a13fcf20419a6e2c">start_cpu_time</a> = 0; </div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#af6278310a2420aa873287185f2625af8">finish_cpu_time</a> = 0;</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#a60bcfaf8308075781464cf18477fc3e4">last_cpu_time</a> = 0; </div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span> </div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#ab42200e7e324f1f59e4ae2452fa22c6f">start_world_time</a> = 0;</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#a7e0257bf7aca5d36a9329827237ffd19">finish_world_time</a> = 0;</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> </div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#ac277ac957d61a2f1810ca0db1814b1c9">num_decisions</a> = 0;</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#a25040e610686ab4e75a582de624946db">num_backtracks</a> = 0;</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#a859161eb057e8035f34ea5fca4d65075">max_dlevel</a> = 0;</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#ae5581743416ca4828eb017c92a4e91a4">num_implications</a> = 0;</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> </div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <a class="code" href="classCSolver.html#a528d66d18534a7d6e73a2e7964103b1c">_num_marked</a> = 0;</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <a class="code" href="classCSolver.html#a65a9481261bf9d9d90ff36de99992094">_dlevel</a> = 0; </div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#a7adfa10784b5c1866e8e3ab08bf68da2">total_bubble_move</a> = 0;</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span> </div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <a class="code" href="classCSolver.html#ad517659e82e1b42617886d2b6758acd3">_dlevel_hook</a> = NULL;</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <a class="code" href="classCSolver.html#af74159b82e953b3b766001d27b8b7981">_decision_hook</a> = NULL;</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <a class="code" href="classCSolver.html#a66cffc281bb01002d1b30e01f6e90a28">_assignment_hook</a> = NULL;</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <a class="code" href="classCSolver.html#ac30b332eb58a51d87d9e1f80f62754f8">_deduction_hook</a> = NULL;</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span> }</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> </div>
<div class="line"><a name="l00101"></a><span class="lineno"><a class="code" href="classCSolver.html#af3c9bd8a7dede30ca60e24bf30073206"> 101</a></span> <a class="code" href="classCSolver.html#af3c9bd8a7dede30ca60e24bf30073206">CSolver::~CSolver</a>()</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> {</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keywordflow">if</span> (<a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#ae8963018c0dcb967130c5d9867922b4d">is_solver_started</a>) {</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> i=0; i<<a class="code" href="classCDatabase.html#af4388cf12d2984898332c519b220d67b">variables</a>().size(); ++i)</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="keyword">delete</span> <a class="code" href="classCSolver.html#a6a21ab9d2ab20a5c4f103cc1a337e35f">_assignment_stack</a>[i];</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  }</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span> }</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span> </div>
<div class="line"><a name="l00109"></a><span class="lineno"><a class="code" href="classCSolver.html#a0ffdf7d6d085ca70b50391598bf4c543"> 109</a></span> <span class="keywordtype">void</span> <a class="code" href="classCSolver.html#a0ffdf7d6d085ca70b50391598bf4c543">CSolver::run_periodic_functions</a>(<span class="keywordtype">void</span>)</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> {</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="comment">//a. clause deletion</span></div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keywordflow">if</span> ( <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#aa4c80dc600b3dcd9f64ef0c602dd59da">allow_clause_deletion</a> &&</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#a25040e610686ab4e75a582de624946db">num_backtracks</a> % <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a5cbdbad62f42fd6f41ba5a4ed6f40af6">clause_deletion_interval</a> == 0)</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <a class="code" href="classCSolver.html#a09834f0e5025b7a748bc24bf113b0f9e">delete_unrelevant_clauses</a>(); </div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <span class="comment">//b. restart</span></div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="keywordflow">if</span> (<a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a0040f5ae79dd7e8a478f60f3d02b1a6d">allow_restart</a> && <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#a25040e610686ab4e75a582de624946db">num_backtracks</a> > <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#ac1a694498478fc1c1e164e81881ea61f">next_restart_backtrack</a>) {</div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#ac1a694498478fc1c1e164e81881ea61f">next_restart_backtrack</a> += <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a319ab0a9a6646af75828ff1a1f9a33b6">restart_backtrack_incr</a>;</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a319ab0a9a6646af75828ff1a1f9a33b6">restart_backtrack_incr</a> += <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a8b11bde6fb341437589e70a1b419d846">restart_backtrack_incr_incr</a>;</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keywordtype">float</span> current = <a class="code" href="classCSolver.html#a7d23251aefbab59adac9658723ac60ad">current_cpu_time</a>()/1000;</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keywordflow">if</span> (current > <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a4fec1add4989095c31fab9ec2a29f824">next_restart_time</a>) {</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="keywordflow">if</span> (<a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#adaaa1d95214368e99b13ac36cbb16dea">verbosity</a> > 1) cout << <span class="stringliteral">"restart..."</span> << <a class="code" href="group__ExprStream__Manip.html#ga05b0ea7353ec24fa8e7e272d7a7875d8" title="Print the end-of-line.">endl</a>;</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a4fec1add4989095c31fab9ec2a29f824">next_restart_time</a> = current + <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a22f43c87a3a8cdfdfd35bd400f3f0b59">restart_time_increment</a>;</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a22f43c87a3a8cdfdfd35bd400f3f0b59">restart_time_increment</a> += <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a914448885e9e2aedefd743f6428552d8">restart_time_incr_incr</a>;</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a2c4888b23c0f7ea4a3a2ec654ddf83b5">randomness</a> = <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#ac22c8353981fed418be2df36b64e635e">restart_randomness</a>;</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <a class="code" href="classCSolver.html#a5b9ce0b016266150cad691e4bb475668">restart</a>();</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  }</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  } </div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="comment">//c. update var stats for decision</span></div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="keywordflow">if</span> ((<a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#ac277ac957d61a2f1810ca0db1814b1c9">num_decisions</a> % 0xff)==0) </div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <a class="code" href="classCSolver.html#acc181946a5845c647818631415c22c22">update_var_stats</a>();</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="comment">//d. run hook functions</span></div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> i=0; i< <a class="code" href="classCSolver.html#a49509a796f28911569176b2cc6d4a0a0">_hooks</a>.size(); ++i) {</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  pair<int,pair<HookFunPtrT, int> > & hook = <a class="code" href="classCSolver.html#a49509a796f28911569176b2cc6d4a0a0">_hooks</a>[i];</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="keywordflow">if</span> (<a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#ac277ac957d61a2f1810ca0db1814b1c9">num_decisions</a> >= hook.first) {</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  hook.first += hook.second.second;</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  hook.second.first((<span class="keywordtype">void</span> *) <span class="keyword">this</span>);</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  }</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  }</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span> } </div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span> </div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span> </div>
<div class="line"><a name="l00142"></a><span class="lineno"><a class="code" href="classCSolver.html#a711b6b701409a5a5fa54dd54b609328b"> 142</a></span> <span class="keywordtype">void</span> <a class="code" href="classCSolver.html#a711b6b701409a5a5fa54dd54b609328b">CSolver::init</a>(<span class="keywordtype">void</span>)</div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span> {</div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <a class="code" href="classCDatabase.html#a8bac062c6bcaf5e92160fd0eff63bcd2">CDatabase::init</a>();</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span> </div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#ae8963018c0dcb967130c5d9867922b4d">is_solver_started</a> = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#acf5b03d1d0c79232a13fcf20419a6e2c">start_cpu_time</a> = <a class="code" href="classCSolver.html#a7d23251aefbab59adac9658723ac60ad">current_cpu_time</a>();</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#ab42200e7e324f1f59e4ae2452fa22c6f">start_world_time</a> = <a class="code" href="classCSolver.html#a4fc755c9adedc2769461bacfc8532f9e">current_world_time</a>();</div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#aaa0ec761ac703cd4d1ebd9446d1dcaf1">num_free_variables</a> = <a class="code" href="classCDatabase.html#ac95e4d7648334447162c0fb4e3de28d7">num_variables</a>();</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> i=0; i<<a class="code" href="classCDatabase.html#af4388cf12d2984898332c519b220d67b">variables</a>().size(); ++i)</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <a class="code" href="classCSolver.html#a6a21ab9d2ab20a5c4f103cc1a337e35f">_assignment_stack</a>.push_back(<span class="keyword">new</span> vector<int>);</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span> </div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <a class="code" href="classCSolver.html#a40c08e5478f016f460d6adec977c2446">_var_order</a>.resize( <a class="code" href="classCDatabase.html#ac95e4d7648334447162c0fb4e3de28d7">num_variables</a>());</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <a class="code" href="classCSolver.html#aec6d0a9cf59ad2da0dad717bea16efcb">_last_var_lits_count</a>[0].resize(<a class="code" href="classCDatabase.html#af4388cf12d2984898332c519b220d67b">variables</a>().size());</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <a class="code" href="classCSolver.html#aec6d0a9cf59ad2da0dad717bea16efcb">_last_var_lits_count</a>[1].resize(<a class="code" href="classCDatabase.html#af4388cf12d2984898332c519b220d67b">variables</a>().size());</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  <a class="code" href="xchaff__utils_8h.html#a763ffd798508592c5092ac77daa5a659">CHECK</a>(<a class="code" href="classCSolver.html#a8804888a9795945f5b09c67c529b898d">dump</a>());</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span> }</div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span> </div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span> </div>
<div class="line"><a name="l00160"></a><span class="lineno"><a class="code" href="classCSolver.html#a1b1f7e9d95712bd0852366c044a5829f"> 160</a></span> <span class="keywordtype">int</span> <a class="code" href="classCSolver.html#a1b1f7e9d95712bd0852366c044a5829f">CSolver::add_variables</a>(<span class="keywordtype">int</span> new_vars)</div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span> {</div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="keywordtype">int</span> old_num_vars = <a class="code" href="classCDatabase.html#af4388cf12d2984898332c519b220d67b">variables</a>().size();</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="keywordtype">int</span> num_vars = old_num_vars + new_vars;</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <a class="code" href="classCDatabase.html#af4388cf12d2984898332c519b220d67b">variables</a>().resize(num_vars) ; </div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  <span class="keywordflow">if</span> (<a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#ae8963018c0dcb967130c5d9867922b4d">is_solver_started</a>) {</div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#aaa0ec761ac703cd4d1ebd9446d1dcaf1">num_free_variables</a> += new_vars;</div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span> </div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i=old_num_vars; i<num_vars; ++i) {</div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  <a class="code" href="classCSolver.html#a6a21ab9d2ab20a5c4f103cc1a337e35f">_assignment_stack</a>.push_back(<span class="keyword">new</span> vector<int>);</div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  <a class="code" href="classCSolver.html#a40c08e5478f016f460d6adec977c2446">_var_order</a>.push_back(pair<int, int>(i,0));</div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  }</div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <a class="code" href="classCSolver.html#aec6d0a9cf59ad2da0dad717bea16efcb">_last_var_lits_count</a>[0].resize(num_vars);</div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <a class="code" href="classCSolver.html#aec6d0a9cf59ad2da0dad717bea16efcb">_last_var_lits_count</a>[1].resize(num_vars);</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  }</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <span class="keywordflow">return</span> old_num_vars;</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span> }</div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span> </div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span> </div>
<div class="line"><a name="l00179"></a><span class="lineno"><a class="code" href="classCSolver.html#a5f90fcc1b1a7994a94fc8395d95cfb38"> 179</a></span> <a class="code" href="xchaff__base_8h.html#a10b9683e115e9c10c0874794507db545">ClauseIdx</a> <a class="code" href="classCSolver.html#a5f90fcc1b1a7994a94fc8395d95cfb38">CSolver::add_clause</a>(vector<long>& lits, <span class="keywordtype">bool</span> addConflicts) {</div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="keywordtype">int</span> new_cl;</div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  <span class="keywordtype">int</span> n_lits = lits.size();</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <span class="comment">//a. do we need to enlarge lits pool?</span></div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  <span class="keywordflow">while</span> (<a class="code" href="classCDatabase.html#ac66c5172be66fa260f8f6d5fd41ca295">lit_pool_free_space</a>() <= n_lits + 1) { </div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="keywordflow">if</span> (<a class="code" href="classCDatabase.html#ae121408a92221766e9139e7cf40ab7de">enlarge_lit_pool</a>()==<span class="keyword">false</span>) </div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  <span class="keywordflow">return</span> -1; <span class="comment">//mem out, can't enlarge lit pool, because </span></div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <span class="comment">//ClauseIdx can't be -1, so it shows error.</span></div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  } </div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  <span class="comment">//b. get a free cl index;</span></div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  <span class="keywordflow">if</span> (<a class="code" href="classCDatabase.html#ae238340b46c3fc75854c4c244ae96d28">_unused_clause_idx_queue</a>.empty()) {</div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  new_cl = <a class="code" href="classCDatabase.html#a6adefe9983a5487fca8fc26cf8d9573f">_clauses</a>.size();</div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  <a class="code" href="classCDatabase.html#a6adefe9983a5487fca8fc26cf8d9573f">_clauses</a>.resize(new_cl + 1);</div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  }</div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  new_cl = <a class="code" href="classCDatabase.html#ae238340b46c3fc75854c4c244ae96d28">_unused_clause_idx_queue</a>.front();</div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  <a class="code" href="classCDatabase.html#ae238340b46c3fc75854c4c244ae96d28">_unused_clause_idx_queue</a>.pop();</div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  }</div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  <span class="comment">//c. add the clause lits to lits pool</span></div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <a class="code" href="classCDatabase.html#a5af3586dfcd579ab14d37c6b6cf75e18">clause</a>(new_cl).<a class="code" href="classCClause.html#a9dea20f5f7e41be18dfbe01105c58f2c">init</a>(<a class="code" href="classCDatabase.html#a3217dc6be8cff75fd418fbd4ff2e5763">lit_pool_end</a>(), n_lits);</div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span> </div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <span class="comment">//I want to verify added clauses are either all free or all 0</span></div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  <span class="keywordtype">bool</span> satisfied = <span class="keyword">false</span>, is_unit = <span class="keyword">false</span>, <a class="code" href="classCDatabase.html#aeb01a55c31dfd135d9f19b561829e88d">is_conflict</a> = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <span class="keywordtype">int</span> num_unknown = 0;</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i=0; i< n_lits; ++i){</div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  <span class="keywordtype">int</span> var_idx = lits[i]>>1;</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  <span class="keywordflow">if</span> ((<span class="keywordtype">unsigned</span>)var_idx >= <a class="code" href="classCDatabase.html#af4388cf12d2984898332c519b220d67b">variables</a>().size()) {</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  assert(<span class="keyword">false</span>);</div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  }</div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <span class="keywordtype">int</span> var_sign = lits[i]&0x1;</div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <a class="code" href="classCDatabase.html#a7fa3358fa63aa02cae8055c0dfe832b7">lit_pool_push_back</a>( ((var_idx<<1) + var_sign) << 2);</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  ++<a class="code" href="classCDatabase.html#af421024d0ade14743332069684aba162">variable</a>(var_idx).<a class="code" href="classCVariable.html#a200c0dd2b0b7cadd109b662fb20ec889">lits_count</a>(var_sign);</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="keywordtype">int</span> lit_value = <a class="code" href="classCDatabase.html#ab0c8f1826cf8c92fc01943ab62d223df">literal_value</a>(<a class="code" href="classCDatabase.html#a5af3586dfcd579ab14d37c6b6cf75e18">clause</a>(new_cl).literal(i));</div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span> </div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  <span class="keywordflow">if</span> (lit_value == 1) {</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  satisfied = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  }</div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (lit_value != 0) {</div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  ++num_unknown;</div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  }</div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  }</div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  <a class="code" href="classCDatabase.html#aeb01a55c31dfd135d9f19b561829e88d">is_conflict</a> = !satisfied && (num_unknown == 0);</div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  is_unit = !satisfied && (num_unknown == 1);</div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  assert(<a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#ae8963018c0dcb967130c5d9867922b4d">is_solver_started</a> || num_unknown == n_lits);</div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  <a class="code" href="classCDatabase.html#a7fa3358fa63aa02cae8055c0dfe832b7">lit_pool_push_back</a>(-new_cl); <span class="comment">//push in the clause idx in the end</span></div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  <span class="comment">//d. set the head/tail pointers</span></div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  <span class="keywordflow">if</span> (<a class="code" href="classCDatabase.html#a5af3586dfcd579ab14d37c6b6cf75e18">clause</a>(new_cl).num_lits() > 1) {</div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  <span class="comment">//add the ht. note: ht must be the last free var</span></div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  <span class="keywordtype">int</span> max_idx = -1, max_dl = -1;</div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  <a class="code" href="classCClause.html">CClause</a> & cl = <a class="code" href="classCDatabase.html#a5af3586dfcd579ab14d37c6b6cf75e18">clause</a>(new_cl);</div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  <span class="keywordtype">int</span> i, sz = cl.<a class="code" href="classCClause.html#ae4f9f5a951b75aab530b5b05a3232082">num_lits</a>();</div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  <span class="keywordtype">int</span> other_ht_idx;</div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  <span class="keywordflow">for</span> (i=0; i< sz; ++i) {</div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  <span class="keywordtype">int</span> v_idx = cl.<a class="code" href="classCClause.html#a8254175660df4f73f485f9227becaf14">literals</a>()[i].<a class="code" href="classCLitPoolElement.html#a98d4a07830b749d83c74943efdf9669b">var_index</a>();</div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  <span class="keywordflow">if</span> (<a class="code" href="classCDatabase.html#af421024d0ade14743332069684aba162">variable</a>(v_idx).value()==<a class="code" href="xchaff__base_8h.html#a915d220aba4527d1e33010bdfcbc6855a6ce26a62afab55d7606ad4e92428b30c">UNKNOWN</a>) {</div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  <span class="keywordtype">int</span> v_sign = cl.<a class="code" href="classCClause.html#a8254175660df4f73f485f9227becaf14">literals</a>()[i].<a class="code" href="classCLitPoolElement.html#add6c6301567da71e72923b3c372081cd">var_sign</a>();</div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  <a class="code" href="classCDatabase.html#af421024d0ade14743332069684aba162">variable</a>(v_idx).<a class="code" href="classCVariable.html#aef0698f402345545601284fa7682e6f5">ht_ptr</a>(v_sign).push_back( & cl.<a class="code" href="classCClause.html#a8254175660df4f73f485f9227becaf14">literals</a>()[i]);</div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  cl.<a class="code" href="classCClause.html#a8254175660df4f73f485f9227becaf14">literals</a>()[i].<a class="code" href="classCLitPoolElement.html#a61ae125841707c699b3587e0f5a668bc">set_ht</a>(1);</div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  other_ht_idx = i;</div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  }</div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  <span class="keywordflow">if</span> (<a class="code" href="classCDatabase.html#af421024d0ade14743332069684aba162">variable</a>(v_idx).<a class="code" href="classCSolver.html#ad51e4ee566b488f8d3610890f3fa1bb7">dlevel</a>() > max_dl) {</div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  max_dl = <a class="code" href="classCDatabase.html#af421024d0ade14743332069684aba162">variable</a>(v_idx).<a class="code" href="classCVariable.html#aedac20571208b480adb2aff58797981a">dlevel</a>();</div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  max_idx = i;</div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  }</div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  }</div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  }</div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  <span class="keywordflow">if</span> (i >= sz) {</div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  <span class="comment">//no unknown literals. so use the max dl literal</span></div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  <span class="keywordtype">int</span> v_idx = cl.<a class="code" href="classCClause.html#a8254175660df4f73f485f9227becaf14">literals</a>()[max_idx].<a class="code" href="classCLitPoolElement.html#a98d4a07830b749d83c74943efdf9669b">var_index</a>();</div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  <span class="keywordtype">int</span> v_sign = cl.<a class="code" href="classCClause.html#a8254175660df4f73f485f9227becaf14">literals</a>()[max_idx].<a class="code" href="classCLitPoolElement.html#add6c6301567da71e72923b3c372081cd">var_sign</a>();</div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  <a class="code" href="classCDatabase.html#af421024d0ade14743332069684aba162">variable</a>(v_idx).<a class="code" href="classCVariable.html#aef0698f402345545601284fa7682e6f5">ht_ptr</a>(v_sign).push_back( & cl.<a class="code" href="classCClause.html#a8254175660df4f73f485f9227becaf14">literals</a>()[max_idx]);</div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  cl.<a class="code" href="classCClause.html#a8254175660df4f73f485f9227becaf14">literals</a>()[max_idx].<a class="code" href="classCLitPoolElement.html#a61ae125841707c699b3587e0f5a668bc">set_ht</a>(1);</div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  other_ht_idx = max_idx;</div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  }</div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  max_idx = -1; max_dl = -1;</div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  <span class="keywordflow">for</span> (i=sz-1; i>=0; --i) {</div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  <span class="keywordflow">if</span> (i==other_ht_idx ) <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  <span class="keywordtype">int</span> v_idx = cl.<a class="code" href="classCClause.html#a8254175660df4f73f485f9227becaf14">literals</a>()[i].<a class="code" href="classCLitPoolElement.html#a98d4a07830b749d83c74943efdf9669b">var_index</a>();</div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  <span class="keywordflow">if</span> (<a class="code" href="classCDatabase.html#af421024d0ade14743332069684aba162">variable</a>(v_idx).value()==<a class="code" href="xchaff__base_8h.html#a915d220aba4527d1e33010bdfcbc6855a6ce26a62afab55d7606ad4e92428b30c">UNKNOWN</a>) {</div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  <span class="keywordtype">int</span> v_sign = cl.<a class="code" href="classCClause.html#a8254175660df4f73f485f9227becaf14">literals</a>()[i].<a class="code" href="classCLitPoolElement.html#add6c6301567da71e72923b3c372081cd">var_sign</a>();</div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  <a class="code" href="classCDatabase.html#af421024d0ade14743332069684aba162">variable</a>(v_idx).<a class="code" href="classCVariable.html#aef0698f402345545601284fa7682e6f5">ht_ptr</a>(v_sign).push_back( & cl.<a class="code" href="classCClause.html#a8254175660df4f73f485f9227becaf14">literals</a>()[i]);</div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  cl.<a class="code" href="classCClause.html#a8254175660df4f73f485f9227becaf14">literals</a>()[i].<a class="code" href="classCLitPoolElement.html#a61ae125841707c699b3587e0f5a668bc">set_ht</a>(-1);</div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  }</div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  <span class="keywordflow">if</span> (<a class="code" href="classCDatabase.html#af421024d0ade14743332069684aba162">variable</a>(v_idx).<a class="code" href="classCSolver.html#ad51e4ee566b488f8d3610890f3fa1bb7">dlevel</a>() > max_dl) {</div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  max_dl = <a class="code" href="classCDatabase.html#af421024d0ade14743332069684aba162">variable</a>(v_idx).<a class="code" href="classCVariable.html#aedac20571208b480adb2aff58797981a">dlevel</a>();</div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  max_idx = i;</div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  }</div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  }</div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  }</div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  <span class="keywordflow">if</span> (i < 0) {</div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  <span class="keywordtype">int</span> v_idx = cl.<a class="code" href="classCClause.html#a8254175660df4f73f485f9227becaf14">literals</a>()[max_idx].<a class="code" href="classCLitPoolElement.html#a98d4a07830b749d83c74943efdf9669b">var_index</a>();</div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  <span class="keywordtype">int</span> v_sign = cl.<a class="code" href="classCClause.html#a8254175660df4f73f485f9227becaf14">literals</a>()[max_idx].<a class="code" href="classCLitPoolElement.html#add6c6301567da71e72923b3c372081cd">var_sign</a>();</div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  <a class="code" href="classCLitPoolElement.html">CLitPoolElement</a> * lit_ptr = & cl.<a class="code" href="classCClause.html#a8254175660df4f73f485f9227becaf14">literals</a>()[max_idx];</div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  <a class="code" href="classCDatabase.html#af421024d0ade14743332069684aba162">variable</a>(v_idx).<a class="code" href="classCVariable.html#aef0698f402345545601284fa7682e6f5">ht_ptr</a>(v_sign).push_back(lit_ptr);</div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  cl.<a class="code" href="classCClause.html#a8254175660df4f73f485f9227becaf14">literals</a>()[max_idx].<a class="code" href="classCLitPoolElement.html#a61ae125841707c699b3587e0f5a668bc">set_ht</a>(-1);</div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  }</div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  }</div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  <span class="comment">//update some statistics</span></div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  ++<a class="code" href="classCDatabase.html#abb17b94a5d63adc740acbe28adb537dd">CDatabase::_stats</a>.<a class="code" href="structCDatabaseStats.html#a2350a97ea7c7333870732c83772fb1f9">num_added_clauses</a>; </div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  <a class="code" href="classCDatabase.html#abb17b94a5d63adc740acbe28adb537dd">CDatabase::_stats</a>.<a class="code" href="structCDatabaseStats.html#ad7baf06bf924ed8d6d9b9f73d734ef74">num_added_literals</a> += n_lits;</div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  <span class="keywordflow">if</span> (is_unit && <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#ae8963018c0dcb967130c5d9867922b4d">is_solver_started</a>) {</div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  <span class="keywordflow">if</span> (n_lits == 1) <a class="code" href="classCSolver.html#a6b12fb5fcb0e279221c4047b3a61d99e">_addedUnitClauses</a>.push_back(new_cl);</div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  <span class="keywordtype">int</span> lit = <a class="code" href="classCDatabase.html#a3e469952453c4b10f1040e9a19375f77">find_unit_literal</a>(new_cl);</div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  assert(lit);</div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  <a class="code" href="classCSolver.html#a21e170987f92adbe179f39ffe3c861be">queue_implication</a>(lit, new_cl);</div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  }</div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (addConflicts && <a class="code" href="classCDatabase.html#aeb01a55c31dfd135d9f19b561829e88d">is_conflict</a>) {</div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  <a class="code" href="classCSolver.html#a6bba00c21025040cc46a0499eaea7f01">_conflicts</a>.push_back(new_cl);</div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  }</div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  <span class="keywordflow">return</span> new_cl;</div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span> }</div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span> </div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span> </div>
<div class="line"><a name="l00296"></a><span class="lineno"><a class="code" href="classCSolver.html#ac06f1192d14de7730356cc102ebaee1b"> 296</a></span> <span class="keywordtype">void</span> <a class="code" href="classCSolver.html#ac06f1192d14de7730356cc102ebaee1b">CSolver::set_var_value</a>(<span class="keywordtype">int</span> v, <span class="keywordtype">int</span> value, <a class="code" href="xchaff__base_8h.html#a10b9683e115e9c10c0874794507db545">ClauseIdx</a> ante, <span class="keywordtype">int</span> dl)</div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span> {</div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  assert (value == 0 || value == 1);</div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  <a class="code" href="xchaff__utils_8h.html#a6683569480fcdbf7931a984f2738731c">CHECK_FULL</a>(<a class="code" href="classCSolver.html#a8804888a9795945f5b09c67c529b898d">dump</a>());</div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  <a class="code" href="xchaff__utils_8h.html#a763ffd798508592c5092ac77daa5a659">CHECK</a>(<a class="code" href="classCSolver.html#ac14b7728d00ff497795bcedfd3f24faa">verify_integrity</a>());</div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  <a class="code" href="xchaff__utils_8h.html#a763ffd798508592c5092ac77daa5a659">CHECK</a> (cout << <span class="stringliteral">"Setting\t"</span> << (value>0?<span class="stringliteral">"+"</span>:<span class="stringliteral">"-"</span>) << v </div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  << <span class="stringliteral">" at "</span> << dl << <span class="stringliteral">" because "</span> << ante<< <a class="code" href="group__ExprStream__Manip.html#ga05b0ea7353ec24fa8e7e272d7a7875d8" title="Print the end-of-line.">endl</a>;);</div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  ++<a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#ae5581743416ca4828eb017c92a4e91a4">num_implications</a> ;</div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  --<a class="code" href="classCSolver.html#a5b1c1a111284ece5745488b12baef8b2">num_free_variables</a>();</div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  <span class="keywordflow">if</span> (<a class="code" href="classCSolver.html#a66cffc281bb01002d1b30e01f6e90a28">_assignment_hook</a>) {</div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  (*_assignment_hook)(<a class="code" href="classCSolver.html#a0de6dbd6e4d7f30c4ee841f15b8ae5e4">_assignment_hook_cookie</a>, v, value);</div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  }</div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  <a class="code" href="classCVariable.html">CVariable</a> & var = <a class="code" href="classCDatabase.html#a0bc13af9359ede872eefe8e1f44b3069">_variables</a>[v];</div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  assert (var.<a class="code" href="classCVariable.html#a7319394585df665256e74df1282f992f">value</a>() == <a class="code" href="xchaff__base_8h.html#a915d220aba4527d1e33010bdfcbc6855a6ce26a62afab55d7606ad4e92428b30c">UNKNOWN</a>);</div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  var.<a class="code" href="classCVariable.html#aedac20571208b480adb2aff58797981a">dlevel</a>() = dl;</div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  var.<a class="code" href="classCVariable.html#a7319394585df665256e74df1282f992f">value</a>() = value;</div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  var.<a class="code" href="classCVariable.html#ab10578bfddce9b0dfb959b84395d799c">set_antecedence</a>(ante);</div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  vector<CLitPoolElement *> & ht_ptrs = var.<a class="code" href="classCVariable.html#aef0698f402345545601284fa7682e6f5">ht_ptr</a>(value);</div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  <span class="keywordflow">if</span> (dl == <a class="code" href="classCSolver.html#ad51e4ee566b488f8d3610890f3fa1bb7">dlevel</a>()) </div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  <a class="code" href="classCSolver.html#ac497f97142b2f82acf8f43ba191feb08">set_var_value_with_current_dl</a>(v, ht_ptrs);</div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  <span class="keywordflow">else</span> </div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  <a class="code" href="classCSolver.html#a4617b5f40d47a1ac33135a76669994a4">set_var_value_not_current_dl</a>(v, ht_ptrs);</div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span> }</div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span> </div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span> </div>
<div class="line"><a name="l00321"></a><span class="lineno"><a class="code" href="classCSolver.html#ac497f97142b2f82acf8f43ba191feb08"> 321</a></span> <span class="keywordtype">void</span> <a class="code" href="classCSolver.html#ac497f97142b2f82acf8f43ba191feb08">CSolver::set_var_value_with_current_dl</a>(<span class="keywordtype">int</span> v, vector<CLitPoolElement *> & ht_ptrs)</div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span> {</div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  <a class="code" href="xchaff__base_8h.html#a10b9683e115e9c10c0874794507db545">ClauseIdx</a> cl_idx;</div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  <a class="code" href="classCLitPoolElement.html">CLitPoolElement</a> * ht_ptr, * other_ht_ptr = NULL, * ptr;</div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  <span class="keywordtype">int</span> dir;</div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  <span class="keywordflow">for</span> (vector <CLitPoolElement *>::iterator itr = ht_ptrs.begin(); itr != ht_ptrs.end(); ++itr) {</div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  ht_ptr = *itr;</div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  dir = ht_ptr-><a class="code" href="classCLitPoolElement.html#a5810e79233dd5430fa52f56e5ef1f3ed">direction</a>();</div>
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  ptr = ht_ptr;</div>
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  <span class="keywordflow">while</span>(1) {</div>
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  ptr += dir;</div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  <span class="keywordflow">if</span> (ptr->val() <= 0) {</div>
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  <span class="keywordflow">if</span> (dir == 1) </div>
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  cl_idx = - ptr-><a class="code" href="classCLitPoolElement.html#a253daa80c6f47528feb0b69e1a5c4623">val</a>();</div>
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  <span class="keywordflow">if</span> (dir == ht_ptr-><a class="code" href="classCLitPoolElement.html#a5810e79233dd5430fa52f56e5ef1f3ed">direction</a>()) {</div>
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  ptr = ht_ptr;</div>
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  dir = -dir;</div>
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  }</div>
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  <span class="keywordtype">int</span> the_value = <a class="code" href="classCDatabase.html#ab0c8f1826cf8c92fc01943ab62d223df">literal_value</a> (*other_ht_ptr);</div>
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  <span class="keywordflow">if</span> (the_value == 0) <span class="comment">//a conflict</span></div>
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  <a class="code" href="classCSolver.html#a6bba00c21025040cc46a0499eaea7f01">_conflicts</a>.push_back(cl_idx);</div>
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( the_value != 1) <span class="comment">//e.g. unknown</span></div>
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  <a class="code" href="classCSolver.html#a21e170987f92adbe179f39ffe3c861be">queue_implication</a> (other_ht_ptr-><a class="code" href="classCLitPoolElement.html#a19281557172f9102172f404bf9f69cbc">s_var</a>(), cl_idx);</div>
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  }</div>
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  <span class="keywordflow">if</span> (ptr->is_ht()) {</div>
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  other_ht_ptr = ptr;</div>
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  }</div>
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  <span class="keywordflow">if</span> (<a class="code" href="classCDatabase.html#ab0c8f1826cf8c92fc01943ab62d223df">literal_value</a>(*ptr) == 0) </div>
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  <span class="comment">//now it's value is either 1 or unknown</span></div>
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  <span class="keywordtype">int</span> v1 = ptr-><a class="code" href="classCLitPoolElement.html#a98d4a07830b749d83c74943efdf9669b">var_index</a>();</div>
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  <span class="keywordtype">int</span> sign = ptr->var_sign();</div>
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  <a class="code" href="classCDatabase.html#af421024d0ade14743332069684aba162">variable</a>(v1).<a class="code" href="classCVariable.html#aef0698f402345545601284fa7682e6f5">ht_ptr</a>(sign).push_back(ptr);</div>
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  ht_ptr-><a class="code" href="classCLitPoolElement.html#af96c5ff47035816003a5c33b6d2591d7">unset_ht</a>();</div>
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  ptr->set_ht(dir);</div>
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span> </div>
<div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  *itr = ht_ptrs.back();</div>
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  ht_ptrs.pop_back();</div>
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  --itr;</div>
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  }</div>
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  }</div>
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span> }</div>
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span> </div>
<div class="line"><a name="l00368"></a><span class="lineno"><a class="code" href="classCSolver.html#a4617b5f40d47a1ac33135a76669994a4"> 368</a></span> <span class="keywordtype">void</span> <a class="code" href="classCSolver.html#a4617b5f40d47a1ac33135a76669994a4">CSolver::set_var_value_not_current_dl</a>(<span class="keywordtype">int</span> v, vector<CLitPoolElement *> & ht_ptrs)</div>
<div class="line"><a name="l00369"></a><span class="lineno"> 369</span> {</div>
<div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  <a class="code" href="xchaff__base_8h.html#a10b9683e115e9c10c0874794507db545">ClauseIdx</a> cl_idx;</div>
<div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  <a class="code" href="classCLitPoolElement.html">CLitPoolElement</a> * ht_ptr, * other_ht_ptr = NULL, * ptr, * max_ptr = NULL;</div>
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  <span class="keywordtype">int</span> dir,max_dl;</div>
<div class="line"><a name="l00373"></a><span class="lineno"> 373</span> </div>
<div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  <span class="keywordflow">for</span> (vector <CLitPoolElement *>::iterator itr = ht_ptrs.begin(); </div>
<div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  itr != ht_ptrs.end(); ++itr) {</div>
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  max_dl = -1;</div>
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  ht_ptr = *itr;</div>
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  dir = ht_ptr-><a class="code" href="classCLitPoolElement.html#a5810e79233dd5430fa52f56e5ef1f3ed">direction</a>();</div>
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  ptr = ht_ptr;</div>
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  <span class="keywordflow">while</span>(1) {</div>
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  ptr += dir;</div>
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  <span class="keywordflow">if</span> (ptr->val() <= 0) {</div>
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  <span class="keywordflow">if</span> (dir == 1) </div>
<div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  cl_idx = - ptr-><a class="code" href="classCLitPoolElement.html#a253daa80c6f47528feb0b69e1a5c4623">val</a>();</div>
<div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  <span class="keywordflow">if</span> (dir == ht_ptr-><a class="code" href="classCLitPoolElement.html#a5810e79233dd5430fa52f56e5ef1f3ed">direction</a>()) {</div>
<div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  ptr = ht_ptr;</div>
<div class="line"><a name="l00387"></a><span class="lineno"> 387</span>  dir = -dir;</div>
<div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  }</div>
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  <span class="keywordflow">if</span> (<a class="code" href="classCDatabase.html#af421024d0ade14743332069684aba162">variable</a>(ht_ptr-><a class="code" href="classCLitPoolElement.html#a98d4a07830b749d83c74943efdf9669b">var_index</a>()).<a class="code" href="classCSolver.html#ad51e4ee566b488f8d3610890f3fa1bb7">dlevel</a>() < max_dl) {</div>
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  <span class="keywordtype">int</span> v1 = max_ptr-><a class="code" href="classCLitPoolElement.html#a98d4a07830b749d83c74943efdf9669b">var_index</a>();</div>
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  <span class="keywordtype">int</span> sign = max_ptr->var_sign();</div>
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  <a class="code" href="classCDatabase.html#af421024d0ade14743332069684aba162">variable</a>(v1).<a class="code" href="classCVariable.html#aef0698f402345545601284fa7682e6f5">ht_ptr</a>(sign).push_back(max_ptr);</div>
<div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  ht_ptr-><a class="code" href="classCLitPoolElement.html#af96c5ff47035816003a5c33b6d2591d7">unset_ht</a>();</div>
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  max_ptr->set_ht(dir);</div>
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  *itr = ht_ptrs.back();</div>
<div class="line"><a name="l00397"></a><span class="lineno"> 397</span>  ht_ptrs.pop_back();</div>
<div class="line"><a name="l00398"></a><span class="lineno"> 398</span>  --itr;</div>
<div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  }</div>
<div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  <span class="keywordtype">int</span> the_value = <a class="code" href="classCDatabase.html#ab0c8f1826cf8c92fc01943ab62d223df">literal_value</a> (*other_ht_ptr);</div>
<div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  <span class="keywordflow">if</span> (the_value == 0) <span class="comment">//a conflict</span></div>
<div class="line"><a name="l00402"></a><span class="lineno"> 402</span>  <a class="code" href="classCSolver.html#a6bba00c21025040cc46a0499eaea7f01">_conflicts</a>.push_back(cl_idx);</div>
<div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( the_value != 1) <span class="comment">//e.g. unknown</span></div>
<div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  <a class="code" href="classCSolver.html#a21e170987f92adbe179f39ffe3c861be">queue_implication</a> (other_ht_ptr-><a class="code" href="classCLitPoolElement.html#a19281557172f9102172f404bf9f69cbc">s_var</a>(), cl_idx);</div>
<div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  }</div>
<div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  <span class="keywordflow">if</span> (ptr->is_ht()) {</div>
<div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  other_ht_ptr = ptr;</div>
<div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  }</div>
<div class="line"><a name="l00411"></a><span class="lineno"> 411</span>  <span class="keywordflow">if</span> (<a class="code" href="classCDatabase.html#ab0c8f1826cf8c92fc01943ab62d223df">literal_value</a>(*ptr) == 0) {</div>
<div class="line"><a name="l00412"></a><span class="lineno"> 412</span>  <span class="keywordflow">if</span> (<a class="code" href="classCDatabase.html#af421024d0ade14743332069684aba162">variable</a>(ptr->var_index()).<a class="code" href="classCSolver.html#ad51e4ee566b488f8d3610890f3fa1bb7">dlevel</a>() > max_dl) {</div>
<div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  max_dl = <a class="code" href="classCDatabase.html#af421024d0ade14743332069684aba162">variable</a>(ptr->var_index()).<a class="code" href="classCSolver.html#ad51e4ee566b488f8d3610890f3fa1bb7">dlevel</a>();</div>
<div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  max_ptr = ptr;</div>
<div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  }</div>
<div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  }</div>
<div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  <span class="comment">//now it's value is either 1 or unknown</span></div>
<div class="line"><a name="l00419"></a><span class="lineno"> 419</span>  <span class="keywordtype">int</span> v1 = ptr->var_index();</div>
<div class="line"><a name="l00420"></a><span class="lineno"> 420</span>  <span class="keywordtype">int</span> sign = ptr->var_sign();</div>
<div class="line"><a name="l00421"></a><span class="lineno"> 421</span>  <a class="code" href="classCDatabase.html#af421024d0ade14743332069684aba162">variable</a>(v1).<a class="code" href="classCVariable.html#aef0698f402345545601284fa7682e6f5">ht_ptr</a>(sign).push_back(ptr);</div>
<div class="line"><a name="l00422"></a><span class="lineno"> 422</span>  ht_ptr-><a class="code" href="classCLitPoolElement.html#af96c5ff47035816003a5c33b6d2591d7">unset_ht</a>();</div>
<div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  ptr->set_ht(dir);</div>
<div class="line"><a name="l00424"></a><span class="lineno"> 424</span> </div>
<div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  *itr = ht_ptrs.back();</div>
<div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  ht_ptrs.pop_back();</div>
<div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  --itr;</div>
<div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  }</div>
<div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  }</div>
<div class="line"><a name="l00431"></a><span class="lineno"> 431</span> }</div>
<div class="line"><a name="l00432"></a><span class="lineno"> 432</span> </div>
<div class="line"><a name="l00433"></a><span class="lineno"><a class="code" href="classCSolver.html#a78ae7136f91966fdc7a55af71060875c"> 433</a></span> <span class="keywordtype">void</span> <a class="code" href="classCSolver.html#a78ae7136f91966fdc7a55af71060875c">CSolver::unset_var_value</a>(<span class="keywordtype">int</span> v)</div>
<div class="line"><a name="l00434"></a><span class="lineno"> 434</span> {</div>
<div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  <a class="code" href="xchaff__utils_8h.html#a763ffd798508592c5092ac77daa5a659">CHECK</a>(cout <<<span class="stringliteral">"Unset var "</span> << (<a class="code" href="classCDatabase.html#af421024d0ade14743332069684aba162">variable</a>(v).value()?<span class="stringliteral">"+"</span>:<span class="stringliteral">"-"</span>) << v << <a class="code" href="group__ExprStream__Manip.html#ga05b0ea7353ec24fa8e7e272d7a7875d8" title="Print the end-of-line.">endl</a>;);</div>
<div class="line"><a name="l00436"></a><span class="lineno"> 436</span>  <a class="code" href="classCVariable.html">CVariable</a> & var = <a class="code" href="classCDatabase.html#af421024d0ade14743332069684aba162">variable</a>(v);</div>
<div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  <span class="keywordflow">if</span> (var.var_score_pos() < <a class="code" href="classCSolver.html#ae7e25a4d85f75c17d55cf64e26056920">_max_score_pos</a>)</div>
<div class="line"><a name="l00438"></a><span class="lineno"> 438</span>  <a class="code" href="classCSolver.html#ae7e25a4d85f75c17d55cf64e26056920">_max_score_pos</a> = var.var_score_pos();</div>
<div class="line"><a name="l00439"></a><span class="lineno"> 439</span>  var.value() = <a class="code" href="xchaff__base_8h.html#a915d220aba4527d1e33010bdfcbc6855a6ce26a62afab55d7606ad4e92428b30c">UNKNOWN</a>;</div>
<div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  var.set_antecedence(<a class="code" href="xchaff__base_8h.html#abd4c1edc3bf20c1f93ebaca33c9b2b64">NULL_CLAUSE</a>);</div>
<div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  var.dlevel() = -1;</div>
<div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  <span class="keywordflow">if</span> (<a class="code" href="classCSolver.html#a66cffc281bb01002d1b30e01f6e90a28">_assignment_hook</a>) {</div>
<div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  (*_assignment_hook)(<a class="code" href="classCSolver.html#a0de6dbd6e4d7f30c4ee841f15b8ae5e4">_assignment_hook_cookie</a>, v, -1);</div>
<div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  }</div>
<div class="line"><a name="l00445"></a><span class="lineno"> 445</span> }</div>
<div class="line"><a name="l00446"></a><span class="lineno"> 446</span> </div>
<div class="line"><a name="l00447"></a><span class="lineno"><a class="code" href="classCSolver.html#a15a8ac75d8da0e7e47c0643870b3bcc9"> 447</a></span> <span class="keywordtype">int</span> <a class="code" href="classCSolver.html#a15a8ac75d8da0e7e47c0643870b3bcc9">CSolver::find_max_clause_dlevel</a>(<a class="code" href="xchaff__base_8h.html#a10b9683e115e9c10c0874794507db545">ClauseIdx</a> cl)</div>
<div class="line"><a name="l00448"></a><span class="lineno"> 448</span> {</div>
<div class="line"><a name="l00449"></a><span class="lineno"> 449</span> <span class="comment">//if cl has single literal, then dlevel should be 0 </span></div>
<div class="line"><a name="l00450"></a><span class="lineno"> 450</span>  <span class="keywordtype">int</span> max_level = 0;</div>
<div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  <span class="keywordflow">if</span> (cl == <a class="code" href="xchaff__base_8h.html#abd4c1edc3bf20c1f93ebaca33c9b2b64">NULL_CLAUSE</a> || cl == <a class="code" href="xchaff__base_8h.html#aa5981a99705aebbb4ca38799d15e0e79">FLIPPED</a>) </div>
<div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  <span class="keywordflow">return</span> <a class="code" href="classCSolver.html#ad51e4ee566b488f8d3610890f3fa1bb7">dlevel</a>();</div>
<div class="line"><a name="l00453"></a><span class="lineno"> 453</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i=0, sz= <a class="code" href="classCDatabase.html#a5af3586dfcd579ab14d37c6b6cf75e18">clause</a>(cl).num_lits(); i<sz; ++i) {</div>
<div class="line"><a name="l00454"></a><span class="lineno"> 454</span>  <span class="keywordtype">int</span> var_idx =((<a class="code" href="classCDatabase.html#a5af3586dfcd579ab14d37c6b6cf75e18">clause</a>(cl).<a class="code" href="classCClause.html#a8254175660df4f73f485f9227becaf14">literals</a>())[i]).var_index();</div>
<div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  <span class="keywordflow">if</span> (<a class="code" href="classCDatabase.html#a0bc13af9359ede872eefe8e1f44b3069">_variables</a>[var_idx].value() != <a class="code" href="xchaff__base_8h.html#a915d220aba4527d1e33010bdfcbc6855a6ce26a62afab55d7606ad4e92428b30c">UNKNOWN</a>) {</div>
<div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  <span class="keywordflow">if</span> (max_level < <a class="code" href="classCDatabase.html#a0bc13af9359ede872eefe8e1f44b3069">_variables</a>[var_idx].<a class="code" href="classCSolver.html#ad51e4ee566b488f8d3610890f3fa1bb7">dlevel</a>())</div>
<div class="line"><a name="l00457"></a><span class="lineno"> 457</span>  max_level = <a class="code" href="classCDatabase.html#a0bc13af9359ede872eefe8e1f44b3069">_variables</a>[var_idx].dlevel();</div>
<div class="line"><a name="l00458"></a><span class="lineno"> 458</span>  }</div>
<div class="line"><a name="l00459"></a><span class="lineno"> 459</span>  }</div>
<div class="line"><a name="l00460"></a><span class="lineno"> 460</span>  <span class="keywordflow">return</span> max_level; </div>
<div class="line"><a name="l00461"></a><span class="lineno"> 461</span> }</div>
<div class="line"><a name="l00462"></a><span class="lineno"> 462</span> </div>
<div class="line"><a name="l00463"></a><span class="lineno"><a class="code" href="classCSolver.html#a60c64d82a19286ac5774adce294aa16a"> 463</a></span> <span class="keywordtype">void</span> <a class="code" href="classCSolver.html#a60c64d82a19286ac5774adce294aa16a">CSolver::dump_assignment_stack</a>(ostream & os) {</div>
<div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  cout << <span class="stringliteral">"Assignment Stack: "</span>;</div>
<div class="line"><a name="l00465"></a><span class="lineno"> 465</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i=0; i<= <a class="code" href="classCSolver.html#ad51e4ee566b488f8d3610890f3fa1bb7">dlevel</a>(); ++i) {</div>
<div class="line"><a name="l00466"></a><span class="lineno"> 466</span>  <span class="keywordflow">if</span> ((*<a class="code" href="classCSolver.html#a6a21ab9d2ab20a5c4f103cc1a337e35f">_assignment_stack</a>[i]).size() > 0)</div>
<div class="line"><a name="l00467"></a><span class="lineno"> 467</span>  <span class="keywordflow">if</span> (<a class="code" href="classCDatabase.html#af421024d0ade14743332069684aba162">variable</a>( (*<a class="code" href="classCSolver.html#a6a21ab9d2ab20a5c4f103cc1a337e35f">_assignment_stack</a>[i])[0]>>1).<a class="code" href="classCVariable.html#a92a4c6ae0e4b566d1f664add2aeb39e9">get_antecedence</a>()==<a class="code" href="xchaff__base_8h.html#aa5981a99705aebbb4ca38799d15e0e79">FLIPPED</a>)</div>
<div class="line"><a name="l00468"></a><span class="lineno"> 468</span>  cout << <span class="stringliteral">"*"</span> ;</div>
<div class="line"><a name="l00469"></a><span class="lineno"> 469</span>  cout << <span class="stringliteral">"("</span> <<i << <span class="stringliteral">":"</span>;</div>
<div class="line"><a name="l00470"></a><span class="lineno"> 470</span>  <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> j=0; j<(*<a class="code" href="classCSolver.html#a6a21ab9d2ab20a5c4f103cc1a337e35f">_assignment_stack</a>[i]).size(); ++j )</div>
<div class="line"><a name="l00471"></a><span class="lineno"> 471</span>  cout << ((*<a class="code" href="classCSolver.html#a6a21ab9d2ab20a5c4f103cc1a337e35f">_assignment_stack</a>[i])[j]&0x1?<span class="stringliteral">"-"</span>:<span class="stringliteral">"+"</span>)</div>
<div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  << ((*<a class="code" href="classCSolver.html#a6a21ab9d2ab20a5c4f103cc1a337e35f">_assignment_stack</a>[i])[j] >> 1) << <span class="stringliteral">" "</span>;</div>
<div class="line"><a name="l00473"></a><span class="lineno"> 473</span>  cout << <span class="stringliteral">") "</span> << <a class="code" href="group__ExprStream__Manip.html#ga05b0ea7353ec24fa8e7e272d7a7875d8" title="Print the end-of-line.">endl</a>;</div>
<div class="line"><a name="l00474"></a><span class="lineno"> 474</span>  }</div>
<div class="line"><a name="l00475"></a><span class="lineno"> 475</span>  cout << <a class="code" href="group__ExprStream__Manip.html#ga05b0ea7353ec24fa8e7e272d7a7875d8" title="Print the end-of-line.">endl</a>;</div>
<div class="line"><a name="l00476"></a><span class="lineno"> 476</span> }</div>
<div class="line"><a name="l00477"></a><span class="lineno"> 477</span> </div>
<div class="line"><a name="l00478"></a><span class="lineno"> 478</span> </div>
<div class="line"><a name="l00479"></a><span class="lineno"><a class="code" href="classCDatabase.html#aeb01a55c31dfd135d9f19b561829e88d"> 479</a></span> <span class="keywordtype">bool</span> <a class="code" href="classCDatabase.html#aeb01a55c31dfd135d9f19b561829e88d">CDatabase::is_conflict</a>(<a class="code" href="xchaff__base_8h.html#a10b9683e115e9c10c0874794507db545">ClauseIdx</a> cl)</div>
<div class="line"><a name="l00480"></a><span class="lineno"> 480</span> {</div>
<div class="line"><a name="l00481"></a><span class="lineno"> 481</span>  <a class="code" href="classCLitPoolElement.html">CLitPoolElement</a> * lits = <a class="code" href="classCDatabase.html#a5af3586dfcd579ab14d37c6b6cf75e18">clause</a>(cl).<a class="code" href="classCClause.html#a8254175660df4f73f485f9227becaf14">literals</a>();</div>
<div class="line"><a name="l00482"></a><span class="lineno"> 482</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i=0, sz= <a class="code" href="classCDatabase.html#a5af3586dfcd579ab14d37c6b6cf75e18">clause</a>(cl).num_lits(); i<sz; ++i)</div>
<div class="line"><a name="l00483"></a><span class="lineno"> 483</span>  <span class="keywordflow">if</span> (<a class="code" href="classCDatabase.html#ab0c8f1826cf8c92fc01943ab62d223df">literal_value</a>(lits[i]) != 0)</div>
<div class="line"><a name="l00484"></a><span class="lineno"> 484</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00485"></a><span class="lineno"> 485</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00486"></a><span class="lineno"> 486</span> }</div>
<div class="line"><a name="l00487"></a><span class="lineno"> 487</span> </div>
<div class="line"><a name="l00488"></a><span class="lineno"><a class="code" href="classCDatabase.html#a85e3fc325b5e311c4081e5ac05e4ac5c"> 488</a></span> <span class="keywordtype">bool</span> <a class="code" href="classCDatabase.html#a85e3fc325b5e311c4081e5ac05e4ac5c">CDatabase::is_satisfied</a>(<a class="code" href="xchaff__base_8h.html#a10b9683e115e9c10c0874794507db545">ClauseIdx</a> cl)</div>
<div class="line"><a name="l00489"></a><span class="lineno"> 489</span> {</div>
<div class="line"><a name="l00490"></a><span class="lineno"> 490</span>  <a class="code" href="classCLitPoolElement.html">CLitPoolElement</a> * lits = <a class="code" href="classCDatabase.html#a5af3586dfcd579ab14d37c6b6cf75e18">clause</a>(cl).<a class="code" href="classCClause.html#a8254175660df4f73f485f9227becaf14">literals</a>();</div>
<div class="line"><a name="l00491"></a><span class="lineno"> 491</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i=0, sz= <a class="code" href="classCDatabase.html#a5af3586dfcd579ab14d37c6b6cf75e18">clause</a>(cl).num_lits(); i<sz; ++i) </div>
<div class="line"><a name="l00492"></a><span class="lineno"> 492</span>  <span class="keywordflow">if</span> (<a class="code" href="classCDatabase.html#ab0c8f1826cf8c92fc01943ab62d223df">literal_value</a>(lits[i]) == 1) </div>
<div class="line"><a name="l00493"></a><span class="lineno"> 493</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00494"></a><span class="lineno"> 494</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00495"></a><span class="lineno"> 495</span> }</div>
<div class="line"><a name="l00496"></a><span class="lineno"> 496</span> </div>
<div class="line"><a name="l00497"></a><span class="lineno"><a class="code" href="classCDatabase.html#a3e469952453c4b10f1040e9a19375f77"> 497</a></span> <span class="keywordtype">int</span> <a class="code" href="classCDatabase.html#a3e469952453c4b10f1040e9a19375f77">CDatabase::find_unit_literal</a>(<a class="code" href="xchaff__base_8h.html#a10b9683e115e9c10c0874794507db545">ClauseIdx</a> cl) </div>
<div class="line"><a name="l00498"></a><span class="lineno"> 498</span> {</div>
<div class="line"><a name="l00499"></a><span class="lineno"> 499</span> <span class="comment">//if it's not unit, return 0.</span></div>
<div class="line"><a name="l00500"></a><span class="lineno"> 500</span>  <span class="keywordtype">int</span> unassigned = 0;</div>
<div class="line"><a name="l00501"></a><span class="lineno"> 501</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i=0, sz= <a class="code" href="classCDatabase.html#a5af3586dfcd579ab14d37c6b6cf75e18">clause</a>(cl).num_lits(); i<sz; ++i) {</div>
<div class="line"><a name="l00502"></a><span class="lineno"> 502</span>  <span class="keywordtype">int</span> var_idx =((<a class="code" href="classCDatabase.html#a5af3586dfcd579ab14d37c6b6cf75e18">clause</a>(cl).<a class="code" href="classCClause.html#a8254175660df4f73f485f9227becaf14">literals</a>())[i]).var_index();</div>
<div class="line"><a name="l00503"></a><span class="lineno"> 503</span>  <span class="keywordflow">if</span> (<a class="code" href="classCDatabase.html#a0bc13af9359ede872eefe8e1f44b3069">_variables</a>[var_idx].value() == <a class="code" href="xchaff__base_8h.html#a915d220aba4527d1e33010bdfcbc6855a6ce26a62afab55d7606ad4e92428b30c">UNKNOWN</a>) {</div>
<div class="line"><a name="l00504"></a><span class="lineno"> 504</span>  <span class="keywordflow">if</span> (unassigned == 0) </div>
<div class="line"><a name="l00505"></a><span class="lineno"> 505</span>  unassigned = <a class="code" href="classCDatabase.html#a5af3586dfcd579ab14d37c6b6cf75e18">clause</a>(cl).<a class="code" href="classCClause.html#a8254175660df4f73f485f9227becaf14">literals</a>()[i].<a class="code" href="classCLitPoolElement.html#a19281557172f9102172f404bf9f69cbc">s_var</a>();</div>
<div class="line"><a name="l00506"></a><span class="lineno"> 506</span>  <span class="keywordflow">else</span> <span class="comment">//more than one unassigned</span></div>
<div class="line"><a name="l00507"></a><span class="lineno"> 507</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00508"></a><span class="lineno"> 508</span>  }</div>
<div class="line"><a name="l00509"></a><span class="lineno"> 509</span>  }</div>
<div class="line"><a name="l00510"></a><span class="lineno"> 510</span>  <span class="keywordflow">return</span> unassigned;</div>
<div class="line"><a name="l00511"></a><span class="lineno"> 511</span> }</div>
<div class="line"><a name="l00512"></a><span class="lineno"> 512</span> </div>
<div class="line"><a name="l00513"></a><span class="lineno"><a class="code" href="classCSolver.html#a09834f0e5025b7a748bc24bf113b0f9e"> 513</a></span> <span class="keywordtype">void</span> <a class="code" href="classCSolver.html#a09834f0e5025b7a748bc24bf113b0f9e">CSolver::delete_unrelevant_clauses</a>(<span class="keywordtype">void</span>) </div>
<div class="line"><a name="l00514"></a><span class="lineno"> 514</span> {</div>
<div class="line"><a name="l00515"></a><span class="lineno"> 515</span>  <a class="code" href="xchaff__utils_8h.html#a6683569480fcdbf7931a984f2738731c">CHECK_FULL</a> (<a class="code" href="classCSolver.html#a8804888a9795945f5b09c67c529b898d">dump</a>());</div>
<div class="line"><a name="l00516"></a><span class="lineno"> 516</span>  <span class="keywordtype">int</span> original_num_deleted = <a class="code" href="classCDatabase.html#ad386f2990781ab78ebbe6eb83b7c365e">num_deleted_clauses</a>();</div>
<div class="line"><a name="l00517"></a><span class="lineno"> 517</span>  <span class="keywordflow">if</span> (<a class="code" href="classCDatabase.html#abb17b94a5d63adc740acbe28adb537dd">CDatabase::_stats</a>.mem_used_up) {</div>
<div class="line"><a name="l00518"></a><span class="lineno"> 518</span>  <a class="code" href="classCDatabase.html#abb17b94a5d63adc740acbe28adb537dd">CDatabase::_stats</a>.<a class="code" href="structCDatabaseStats.html#ab317cc5ad2da6a68cdec37e71fd80f4f">mem_used_up</a> = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00519"></a><span class="lineno"> 519</span>  <span class="keywordflow">if</span> (++<a class="code" href="classCDatabase.html#abb17b94a5d63adc740acbe28adb537dd">CDatabase::_stats</a>.mem_used_up_counts < 5) {</div>
<div class="line"><a name="l00520"></a><span class="lineno"> 520</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a97c37504943c58e8cf1afc406018b027">max_unrelevance</a> = (int) (<a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a97c37504943c58e8cf1afc406018b027">max_unrelevance</a> * 0.8);</div>
<div class="line"><a name="l00521"></a><span class="lineno"> 521</span>  <span class="keywordflow">if</span> (<a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a97c37504943c58e8cf1afc406018b027">max_unrelevance</a> < 4)</div>
<div class="line"><a name="l00522"></a><span class="lineno"> 522</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a97c37504943c58e8cf1afc406018b027">max_unrelevance</a> = 4;</div>
<div class="line"><a name="l00523"></a><span class="lineno"> 523</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a8747b9ca39f6cf7312f081d223634194">min_num_clause_lits_for_delete</a> = (int) (<a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a8747b9ca39f6cf7312f081d223634194">min_num_clause_lits_for_delete</a>* 0.8);</div>
<div class="line"><a name="l00524"></a><span class="lineno"> 524</span>  <span class="keywordflow">if</span> (<a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a8747b9ca39f6cf7312f081d223634194">min_num_clause_lits_for_delete</a> < 10)</div>
<div class="line"><a name="l00525"></a><span class="lineno"> 525</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a8747b9ca39f6cf7312f081d223634194">min_num_clause_lits_for_delete</a> = 10;</div>
<div class="line"><a name="l00526"></a><span class="lineno"> 526</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#af82455d9df59584dbf9f400cf6f918b1">max_conflict_clause_length</a> = (int) (<a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#af82455d9df59584dbf9f400cf6f918b1">max_conflict_clause_length</a>*0.8);</div>
<div class="line"><a name="l00527"></a><span class="lineno"> 527</span>  <span class="keywordflow">if</span> (<a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#af82455d9df59584dbf9f400cf6f918b1">max_conflict_clause_length</a> < 50 )</div>
<div class="line"><a name="l00528"></a><span class="lineno"> 528</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#af82455d9df59584dbf9f400cf6f918b1">max_conflict_clause_length</a> = 50;</div>
<div class="line"><a name="l00529"></a><span class="lineno"> 529</span>  <a class="code" href="xchaff__utils_8h.html#a763ffd798508592c5092ac77daa5a659">CHECK</a>(</div>
<div class="line"><a name="l00530"></a><span class="lineno"> 530</span>  cout << <span class="stringliteral">"Forced to reduce unrelevance in clause deletion. "</span> << <a class="code" href="group__ExprStream__Manip.html#ga05b0ea7353ec24fa8e7e272d7a7875d8" title="Print the end-of-line.">endl</a>;</div>
<div class="line"><a name="l00531"></a><span class="lineno"> 531</span>  cout <<<span class="stringliteral">"MaxUnrel: "</span> << <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a97c37504943c58e8cf1afc406018b027">max_unrelevance</a> </div>
<div class="line"><a name="l00532"></a><span class="lineno"> 532</span>  << <span class="stringliteral">" MinLenDel: "</span> << <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a8747b9ca39f6cf7312f081d223634194">min_num_clause_lits_for_delete</a></div>
<div class="line"><a name="l00533"></a><span class="lineno"> 533</span>  << <span class="stringliteral">" MaxLenCL : "</span> << <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#af82455d9df59584dbf9f400cf6f918b1">max_conflict_clause_length</a> << <a class="code" href="group__ExprStream__Manip.html#ga05b0ea7353ec24fa8e7e272d7a7875d8" title="Print the end-of-line.">endl</a>;</div>
<div class="line"><a name="l00534"></a><span class="lineno"> 534</span>  );</div>
<div class="line"><a name="l00535"></a><span class="lineno"> 535</span>  }</div>
<div class="line"><a name="l00536"></a><span class="lineno"> 536</span>  }</div>
<div class="line"><a name="l00537"></a><span class="lineno"> 537</span>  <span class="comment">//first find out the clause to delete and mark them</span></div>
<div class="line"><a name="l00538"></a><span class="lineno"> 538</span>  <span class="keywordflow">for</span> (vector<CClause>::iterator itr = <a class="code" href="classCDatabase.html#a0c2329a20ee0a2672475933c3edd888e">clauses</a>().begin() + <a class="code" href="classCDatabase.html#a25c0a024183a09bf973942b1e4865501">init_num_clauses</a>(); </div>
<div class="line"><a name="l00539"></a><span class="lineno"> 539</span>  itr != <a class="code" href="classCDatabase.html#a0c2329a20ee0a2672475933c3edd888e">clauses</a>().end(); ++itr) {</div>
<div class="line"><a name="l00540"></a><span class="lineno"> 540</span>  <a class="code" href="classCClause.html">CClause</a> & cl = * itr;</div>
<div class="line"><a name="l00541"></a><span class="lineno"> 541</span>  <span class="keywordflow">if</span> (!cl.<a class="code" href="classCClause.html#accc3ecb433cd7ba00affc3180b0911d4">in_use</a>() || cl.<a class="code" href="classCClause.html#ae4f9f5a951b75aab530b5b05a3232082">num_lits</a>() < <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a8747b9ca39f6cf7312f081d223634194">min_num_clause_lits_for_delete</a> ) <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l00542"></a><span class="lineno"> 542</span>  <span class="keywordtype">int</span> val_0_lits = 0, val_1_lits = 0, unknown_lits = 0;</div>
<div class="line"><a name="l00543"></a><span class="lineno"> 543</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i=0; i< cl.<a class="code" href="classCClause.html#ae4f9f5a951b75aab530b5b05a3232082">num_lits</a>(); ++i) {</div>
<div class="line"><a name="l00544"></a><span class="lineno"> 544</span>  <span class="keywordtype">int</span> lit_value = <a class="code" href="classCDatabase.html#ab0c8f1826cf8c92fc01943ab62d223df">literal_value</a> (cl.<a class="code" href="classCClause.html#aa9e91f96e80b94da2b28e3ab381b9acc">literal</a>(i));</div>
<div class="line"><a name="l00545"></a><span class="lineno"> 545</span>  <span class="keywordflow">if</span> (lit_value == 0 ) ++val_0_lits;</div>
<div class="line"><a name="l00546"></a><span class="lineno"> 546</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (lit_value == 1) ++val_1_lits;</div>
<div class="line"><a name="l00547"></a><span class="lineno"> 547</span>  <span class="keywordflow">else</span> ++unknown_lits;</div>
<div class="line"><a name="l00548"></a><span class="lineno"> 548</span>  <span class="keywordflow">if</span> (unknown_lits + val_1_lits > <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a97c37504943c58e8cf1afc406018b027">max_unrelevance</a>) {</div>
<div class="line"><a name="l00549"></a><span class="lineno"> 549</span>  <a class="code" href="classCDatabase.html#a6529c55a489afcd88e37370d6a61ae96">mark_clause_deleted</a>(cl);</div>
<div class="line"><a name="l00550"></a><span class="lineno"> 550</span>  <a class="code" href="classCDatabase.html#ae238340b46c3fc75854c4c244ae96d28">_unused_clause_idx_queue</a>.push(itr - <a class="code" href="classCDatabase.html#a0c2329a20ee0a2672475933c3edd888e">clauses</a>().begin());</div>
<div class="line"><a name="l00551"></a><span class="lineno"> 551</span>  <a class="code" href="xchaff__utils_8h.html#a763ffd798508592c5092ac77daa5a659">CHECK</a> (cout << <span class="stringliteral">"Deleting Unrelevant clause: "</span> << cl << <a class="code" href="group__ExprStream__Manip.html#ga05b0ea7353ec24fa8e7e272d7a7875d8" title="Print the end-of-line.">endl</a>;);</div>
<div class="line"><a name="l00552"></a><span class="lineno"> 552</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00553"></a><span class="lineno"> 553</span>  }</div>
<div class="line"><a name="l00554"></a><span class="lineno"> 554</span>  <span class="keywordflow">if</span> (cl.<a class="code" href="classCClause.html#ae4f9f5a951b75aab530b5b05a3232082">num_lits</a>() > <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#af82455d9df59584dbf9f400cf6f918b1">max_conflict_clause_length</a> && </div>
<div class="line"><a name="l00555"></a><span class="lineno"> 555</span>  (unknown_lits+val_1_lits > 1) ) { <span class="comment">//to make sure it's not generating an implication</span></div>
<div class="line"><a name="l00556"></a><span class="lineno"> 556</span>  <span class="comment">//and it's not an antecedence for other var assignment</span></div>
<div class="line"><a name="l00557"></a><span class="lineno"> 557</span>  <a class="code" href="classCDatabase.html#a6529c55a489afcd88e37370d6a61ae96">mark_clause_deleted</a>(cl);</div>
<div class="line"><a name="l00558"></a><span class="lineno"> 558</span>  <a class="code" href="xchaff__utils_8h.html#a763ffd798508592c5092ac77daa5a659">CHECK</a> (cout << <span class="stringliteral">"Deleting too large clause: "</span> << cl << <a class="code" href="group__ExprStream__Manip.html#ga05b0ea7353ec24fa8e7e272d7a7875d8" title="Print the end-of-line.">endl</a>;);</div>
<div class="line"><a name="l00559"></a><span class="lineno"> 559</span>  <a class="code" href="classCDatabase.html#ae238340b46c3fc75854c4c244ae96d28">_unused_clause_idx_queue</a>.push(itr - <a class="code" href="classCDatabase.html#a0c2329a20ee0a2672475933c3edd888e">clauses</a>().begin());</div>
<div class="line"><a name="l00560"></a><span class="lineno"> 560</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00561"></a><span class="lineno"> 561</span>  }</div>
<div class="line"><a name="l00562"></a><span class="lineno"> 562</span>  }</div>
<div class="line"><a name="l00563"></a><span class="lineno"> 563</span>  }</div>
<div class="line"><a name="l00564"></a><span class="lineno"> 564</span>  <span class="comment">//now delete the index from variables</span></div>
<div class="line"><a name="l00565"></a><span class="lineno"> 565</span>  <span class="keywordflow">if</span> (original_num_deleted == <a class="code" href="classCDatabase.html#ad386f2990781ab78ebbe6eb83b7c365e">num_deleted_clauses</a>()) </div>
<div class="line"><a name="l00566"></a><span class="lineno"> 566</span>  return ; <span class="comment">//didn't delete anything</span></div>
<div class="line"><a name="l00567"></a><span class="lineno"> 567</span>  <span class="keywordflow">for</span> (vector<CVariable>::iterator itr = <a class="code" href="classCDatabase.html#af4388cf12d2984898332c519b220d67b">variables</a>().begin(); </div>
<div class="line"><a name="l00568"></a><span class="lineno"> 568</span>  itr != <a class="code" href="classCDatabase.html#af4388cf12d2984898332c519b220d67b">variables</a>().end(); ++ itr) {</div>
<div class="line"><a name="l00569"></a><span class="lineno"> 569</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i=0; i<2; ++i) { <span class="comment">//for each phase</span></div>
<div class="line"><a name="l00570"></a><span class="lineno"> 570</span>  <span class="comment">//delete the h_t index from the vars</span></div>
<div class="line"><a name="l00571"></a><span class="lineno"> 571</span>  vector<CLitPoolElement *> & ht_ptr = (*itr).ht_ptr(i);</div>
<div class="line"><a name="l00572"></a><span class="lineno"> 572</span>  <span class="keywordflow">for</span> (vector<CLitPoolElement *>::iterator my_itr = ht_ptr.begin(); </div>
<div class="line"><a name="l00573"></a><span class="lineno"> 573</span>  my_itr != ht_ptr.end(); ++my_itr) {</div>
<div class="line"><a name="l00574"></a><span class="lineno"> 574</span>  <span class="keywordflow">if</span> ( (*my_itr)->val() <= 0) {</div>
<div class="line"><a name="l00575"></a><span class="lineno"> 575</span>  *my_itr = ht_ptr.back();</div>
<div class="line"><a name="l00576"></a><span class="lineno"> 576</span>  ht_ptr.pop_back();</div>
<div class="line"><a name="l00577"></a><span class="lineno"> 577</span>  --my_itr;</div>
<div class="line"><a name="l00578"></a><span class="lineno"> 578</span>  }</div>
<div class="line"><a name="l00579"></a><span class="lineno"> 579</span>  }</div>
<div class="line"><a name="l00580"></a><span class="lineno"> 580</span>  }</div>
<div class="line"><a name="l00581"></a><span class="lineno"> 581</span>  }</div>
<div class="line"><a name="l00582"></a><span class="lineno"> 582</span>  <a class="code" href="xchaff__utils_8h.html#a763ffd798508592c5092ac77daa5a659">CHECK</a>(cout << <span class="stringliteral">"Deleting "</span> << <a class="code" href="classCDatabase.html#ad386f2990781ab78ebbe6eb83b7c365e">num_deleted_clauses</a>() - original_num_deleted << <span class="stringliteral">" Clause "</span>;</div>
<div class="line"><a name="l00583"></a><span class="lineno"> 583</span>  cout << <span class="stringliteral">" and "</span> << <a class="code" href="classCDatabase.html#a3e0c56c9059f90ce0b3ba0f94e2aeed2">num_deleted_literals</a>() - original_del_lits << <span class="stringliteral">" Literals "</span> << <a class="code" href="group__ExprStream__Manip.html#ga05b0ea7353ec24fa8e7e272d7a7875d8" title="Print the end-of-line.">endl</a>;);</div>
<div class="line"><a name="l00584"></a><span class="lineno"> 584</span>  <a class="code" href="xchaff__utils_8h.html#a6683569480fcdbf7931a984f2738731c">CHECK_FULL</a> (<a class="code" href="classCSolver.html#a8804888a9795945f5b09c67c529b898d">dump</a>());</div>
<div class="line"><a name="l00585"></a><span class="lineno"> 585</span> }</div>
<div class="line"><a name="l00586"></a><span class="lineno"> 586</span> <span class="comment">//============================================================================================</span></div>
<div class="line"><a name="l00587"></a><span class="lineno"><a class="code" href="classCSolver.html#af3b17269840c1a07e21303c1fca4e5a0"> 587</a></span> <span class="keywordtype">bool</span> <a class="code" href="classCSolver.html#af3b17269840c1a07e21303c1fca4e5a0">CSolver::time_out</a>(<span class="keywordtype">void</span>) </div>
<div class="line"><a name="l00588"></a><span class="lineno"> 588</span> {</div>
<div class="line"><a name="l00589"></a><span class="lineno"> 589</span>  <span class="keywordflow">if</span> ( (<a class="code" href="classCSolver.html#a7d23251aefbab59adac9658723ac60ad">current_cpu_time</a>() - <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#acf5b03d1d0c79232a13fcf20419a6e2c">start_cpu_time</a>)/1000.0 > <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a1904f8790a16c706e0d2ba51ce11c364">time_limit</a> )</div>
<div class="line"><a name="l00590"></a><span class="lineno"> 590</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00591"></a><span class="lineno"> 591</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00592"></a><span class="lineno"> 592</span> }</div>
<div class="line"><a name="l00593"></a><span class="lineno"> 593</span> </div>
<div class="line"><a name="l00594"></a><span class="lineno"><a class="code" href="xchaff__solver_8cpp.html#a044c6cf23b7a89698e33df8aae6ff024"> 594</a></span> <span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="xchaff__solver_8cpp.html#a044c6cf23b7a89698e33df8aae6ff024">compare_var_stat</a>(<span class="keyword">const</span> pair<int, int> & v1, </div>
<div class="line"><a name="l00595"></a><span class="lineno"> 595</span>  <span class="keyword">const</span> pair<int, int> & v2) </div>
<div class="line"><a name="l00596"></a><span class="lineno"> 596</span> {</div>
<div class="line"><a name="l00597"></a><span class="lineno"> 597</span>  <span class="keywordflow">if</span> (v1.second > v2.second) <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00598"></a><span class="lineno"> 598</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00599"></a><span class="lineno"> 599</span> }</div>
<div class="line"><a name="l00600"></a><span class="lineno"> 600</span> </div>
<div class="line"><a name="l00601"></a><span class="lineno"><a class="code" href="classCSolver.html#acc181946a5845c647818631415c22c22"> 601</a></span> <span class="keywordtype">void</span> <a class="code" href="classCSolver.html#acc181946a5845c647818631415c22c22">CSolver::update_var_stats</a>(<span class="keywordtype">void</span>) </div>
<div class="line"><a name="l00602"></a><span class="lineno"> 602</span> {</div>
<div class="line"><a name="l00603"></a><span class="lineno"> 603</span>  <span class="keywordflow">for</span>(<span class="keywordtype">unsigned</span> i=1; i< <a class="code" href="classCDatabase.html#af4388cf12d2984898332c519b220d67b">variables</a>().size(); ++i) {</div>
<div class="line"><a name="l00604"></a><span class="lineno"> 604</span>  <a class="code" href="classCVariable.html">CVariable</a> & var = <a class="code" href="classCDatabase.html#af421024d0ade14743332069684aba162">variable</a>(i);</div>
<div class="line"><a name="l00605"></a><span class="lineno"> 605</span>  var.<a class="code" href="classCVariable.html#acf5cbd17ee39aa733dd5445c5836ec81">score</a>(0) = var.<a class="code" href="classCVariable.html#acf5cbd17ee39aa733dd5445c5836ec81">score</a>(0)/2 + var.<a class="code" href="classCVariable.html#a200c0dd2b0b7cadd109b662fb20ec889">lits_count</a>(0) - <a class="code" href="classCSolver.html#aec6d0a9cf59ad2da0dad717bea16efcb">_last_var_lits_count</a>[0][i];</div>
<div class="line"><a name="l00606"></a><span class="lineno"> 606</span>  var.<a class="code" href="classCVariable.html#acf5cbd17ee39aa733dd5445c5836ec81">score</a>(1) = var.<a class="code" href="classCVariable.html#acf5cbd17ee39aa733dd5445c5836ec81">score</a>(1)/2 + var.<a class="code" href="classCVariable.html#a200c0dd2b0b7cadd109b662fb20ec889">lits_count</a>(1) - <a class="code" href="classCSolver.html#aec6d0a9cf59ad2da0dad717bea16efcb">_last_var_lits_count</a>[1][i];</div>
<div class="line"><a name="l00607"></a><span class="lineno"> 607</span>  <a class="code" href="classCSolver.html#aec6d0a9cf59ad2da0dad717bea16efcb">_last_var_lits_count</a>[0][i] = var.<a class="code" href="classCVariable.html#a200c0dd2b0b7cadd109b662fb20ec889">lits_count</a>(0);</div>
<div class="line"><a name="l00608"></a><span class="lineno"> 608</span>  <a class="code" href="classCSolver.html#aec6d0a9cf59ad2da0dad717bea16efcb">_last_var_lits_count</a>[1][i] = var.<a class="code" href="classCVariable.html#a200c0dd2b0b7cadd109b662fb20ec889">lits_count</a>(1);</div>
<div class="line"><a name="l00609"></a><span class="lineno"> 609</span>  <a class="code" href="classCSolver.html#a40c08e5478f016f460d6adec977c2446">_var_order</a>[i-1] = pair<int, int>(i, var.<a class="code" href="classCVariable.html#acf5cbd17ee39aa733dd5445c5836ec81">score</a>());</div>
<div class="line"><a name="l00610"></a><span class="lineno"> 610</span>  }</div>
<div class="line"><a name="l00611"></a><span class="lineno"> 611</span>  ::stable_sort(<a class="code" href="classCSolver.html#a40c08e5478f016f460d6adec977c2446">_var_order</a>.begin(), <a class="code" href="classCSolver.html#a40c08e5478f016f460d6adec977c2446">_var_order</a>.end(), <a class="code" href="xchaff__solver_8cpp.html#a044c6cf23b7a89698e33df8aae6ff024">compare_var_stat</a>);</div>
<div class="line"><a name="l00612"></a><span class="lineno"> 612</span>  <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> i=0; i<<a class="code" href="classCSolver.html#a40c08e5478f016f460d6adec977c2446">_var_order</a>.size(); ++i) </div>
<div class="line"><a name="l00613"></a><span class="lineno"> 613</span>  <a class="code" href="classCDatabase.html#af421024d0ade14743332069684aba162">variable</a>(<a class="code" href="classCSolver.html#a40c08e5478f016f460d6adec977c2446">_var_order</a>[i].first).<a class="code" href="classCVariable.html#a5d0f657e55242e1324c345bb8f6c9877">var_score_pos</a>() = i;</div>
<div class="line"><a name="l00614"></a><span class="lineno"> 614</span>  <a class="code" href="classCSolver.html#ae7e25a4d85f75c17d55cf64e26056920">_max_score_pos</a> = 0;</div>
<div class="line"><a name="l00615"></a><span class="lineno"> 615</span> }</div>
<div class="line"><a name="l00616"></a><span class="lineno"> 616</span> </div>
<div class="line"><a name="l00617"></a><span class="lineno"><a class="code" href="classCSolver.html#a752f7912bef54fb9f310cbeeabc34543"> 617</a></span> <span class="keywordtype">bool</span> <a class="code" href="classCSolver.html#a752f7912bef54fb9f310cbeeabc34543">CSolver::decide_next_branch</a>(<span class="keywordtype">void</span>)</div>
<div class="line"><a name="l00618"></a><span class="lineno"> 618</span> {</div>
<div class="line"><a name="l00619"></a><span class="lineno"> 619</span>  ++<a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#ac277ac957d61a2f1810ca0db1814b1c9">num_decisions</a>;</div>
<div class="line"><a name="l00620"></a><span class="lineno"> 620</span>  <span class="keywordflow">if</span> (!<a class="code" href="classCSolver.html#aeab7cd8f6085990a2a1ed518c9d75c6e">_implication_queue</a>.empty()) {</div>
<div class="line"><a name="l00621"></a><span class="lineno"> 621</span>  <span class="comment">//some hook function did a decision, so skip my own decision making.</span></div>
<div class="line"><a name="l00622"></a><span class="lineno"> 622</span>  <span class="comment">//if the front of implication queue is 0, that means it's finished</span></div>
<div class="line"><a name="l00623"></a><span class="lineno"> 623</span>  <span class="comment">//because var index start from 1, so 2 *vid + sign won't be 0. </span></div>
<div class="line"><a name="l00624"></a><span class="lineno"> 624</span>  <span class="comment">//else it's a valid decision.</span></div>
<div class="line"><a name="l00625"></a><span class="lineno"> 625</span>  <a class="code" href="classCSolver.html#ae7e25a4d85f75c17d55cf64e26056920">_max_score_pos</a> = 0; <span class="comment">//reset the max_score_position.</span></div>
<div class="line"><a name="l00626"></a><span class="lineno"> 626</span>  <span class="keywordflow">return</span> <a class="code" href="classCSolver.html#aeab7cd8f6085990a2a1ed518c9d75c6e">_implication_queue</a>.front().first;</div>
<div class="line"><a name="l00627"></a><span class="lineno"> 627</span>  }</div>
<div class="line"><a name="l00628"></a><span class="lineno"> 628</span>  </div>
<div class="line"><a name="l00629"></a><span class="lineno"> 629</span>  <span class="keywordtype">int</span> s_var = 0, s_var2;</div>
<div class="line"><a name="l00630"></a><span class="lineno"> 630</span>  <span class="keywordtype">bool</span> done = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00631"></a><span class="lineno"> 631</span> </div>
<div class="line"><a name="l00632"></a><span class="lineno"> 632</span>  <span class="keywordtype">unsigned</span> i, var_idx, sign;</div>
<div class="line"><a name="l00633"></a><span class="lineno"> 633</span>  <a class="code" href="classCVariable.html">CVariable</a> * ptr;</div>
<div class="line"><a name="l00634"></a><span class="lineno"> 634</span> </div>
<div class="line"><a name="l00635"></a><span class="lineno"> 635</span>  <span class="keywordflow">for</span> (i=<a class="code" href="classCSolver.html#ae7e25a4d85f75c17d55cf64e26056920">_max_score_pos</a>; i<<a class="code" href="classCSolver.html#a40c08e5478f016f460d6adec977c2446">_var_order</a>.size(); ++i) {</div>
<div class="line"><a name="l00636"></a><span class="lineno"> 636</span>  var_idx = <a class="code" href="classCSolver.html#a40c08e5478f016f460d6adec977c2446">_var_order</a>[i].first;</div>
<div class="line"><a name="l00637"></a><span class="lineno"> 637</span>  ptr = &(<a class="code" href="classCDatabase.html#af4388cf12d2984898332c519b220d67b">variables</a>()[var_idx]);</div>
<div class="line"><a name="l00638"></a><span class="lineno"> 638</span>  <span class="keywordflow">if</span> (ptr-><a class="code" href="classCVariable.html#a7319394585df665256e74df1282f992f">value</a>()==<a class="code" href="xchaff__base_8h.html#a915d220aba4527d1e33010bdfcbc6855a6ce26a62afab55d7606ad4e92428b30c">UNKNOWN</a>) {</div>
<div class="line"><a name="l00639"></a><span class="lineno"> 639</span>  <span class="comment">//move th max score position pointer</span></div>
<div class="line"><a name="l00640"></a><span class="lineno"> 640</span>  <a class="code" href="classCSolver.html#ae7e25a4d85f75c17d55cf64e26056920">_max_score_pos</a> = i;</div>
<div class="line"><a name="l00641"></a><span class="lineno"> 641</span>  <span class="comment">//make some randomness happen</span></div>
<div class="line"><a name="l00642"></a><span class="lineno"> 642</span>  <span class="keywordflow">if</span> (--<a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a2c4888b23c0f7ea4a3a2ec654ddf83b5">randomness</a> < <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#adde3fd4026e6ce1a5598ac2766326e04">base_randomness</a>)</div>
<div class="line"><a name="l00643"></a><span class="lineno"> 643</span>  <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a2c4888b23c0f7ea4a3a2ec654ddf83b5">randomness</a> = <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#adde3fd4026e6ce1a5598ac2766326e04">base_randomness</a>;</div>
<div class="line"><a name="l00644"></a><span class="lineno"> 644</span> </div>
<div class="line"><a name="l00645"></a><span class="lineno"> 645</span>  <span class="keywordtype">int</span> randomness = <a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a2c4888b23c0f7ea4a3a2ec654ddf83b5">randomness</a>;</div>
<div class="line"><a name="l00646"></a><span class="lineno"> 646</span>  <span class="keywordflow">if</span> (randomness >= <a class="code" href="classCSolver.html#a5b1c1a111284ece5745488b12baef8b2">num_free_variables</a>())</div>
<div class="line"><a name="l00647"></a><span class="lineno"> 647</span>  randomness = <a class="code" href="classCSolver.html#a5b1c1a111284ece5745488b12baef8b2">num_free_variables</a>() - 1;</div>
<div class="line"><a name="l00648"></a><span class="lineno"> 648</span>  <span class="keywordtype">int</span> skip =random()%(1+randomness);</div>
<div class="line"><a name="l00649"></a><span class="lineno"> 649</span>  <span class="keywordtype">int</span> index = i;</div>
<div class="line"><a name="l00650"></a><span class="lineno"> 650</span>  <span class="keywordflow">while</span> (skip > 0) {</div>
<div class="line"><a name="l00651"></a><span class="lineno"> 651</span>  ++index;</div>
<div class="line"><a name="l00652"></a><span class="lineno"> 652</span>  var_idx = <a class="code" href="classCSolver.html#a40c08e5478f016f460d6adec977c2446">_var_order</a>[index].first;</div>
<div class="line"><a name="l00653"></a><span class="lineno"> 653</span>  ptr = &(<a class="code" href="classCDatabase.html#af4388cf12d2984898332c519b220d67b">variables</a>()[var_idx]);</div>
<div class="line"><a name="l00654"></a><span class="lineno"> 654</span>  <span class="keywordflow">if</span> (ptr-><a class="code" href="classCVariable.html#a7319394585df665256e74df1282f992f">value</a>()==<a class="code" href="xchaff__base_8h.html#a915d220aba4527d1e33010bdfcbc6855a6ce26a62afab55d7606ad4e92428b30c">UNKNOWN</a>)</div>
<div class="line"><a name="l00655"></a><span class="lineno"> 655</span>  --skip;</div>
<div class="line"><a name="l00656"></a><span class="lineno"> 656</span>  }</div>
<div class="line"><a name="l00657"></a><span class="lineno"> 657</span>  assert (ptr-><a class="code" href="classCVariable.html#a7319394585df665256e74df1282f992f">value</a>() == <a class="code" href="xchaff__base_8h.html#a915d220aba4527d1e33010bdfcbc6855a6ce26a62afab55d7606ad4e92428b30c">UNKNOWN</a>);</div>
<div class="line"><a name="l00658"></a><span class="lineno"> 658</span>  sign = ptr-><a class="code" href="classCVariable.html#acf5cbd17ee39aa733dd5445c5836ec81">score</a>(0) > ptr-><a class="code" href="classCVariable.html#acf5cbd17ee39aa733dd5445c5836ec81">score</a>(1) ? 0 : 1;</div>
<div class="line"><a name="l00659"></a><span class="lineno"> 659</span>  s_var = var_idx + var_idx + sign;</div>
<div class="line"><a name="l00660"></a><span class="lineno"> 660</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00661"></a><span class="lineno"> 661</span>  }</div>
<div class="line"><a name="l00662"></a><span class="lineno"> 662</span>  }</div>
<div class="line"><a name="l00663"></a><span class="lineno"> 663</span>  <span class="keywordflow">if</span> (s_var < 2) done = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00664"></a><span class="lineno"> 664</span> </div>
<div class="line"><a name="l00665"></a><span class="lineno"> 665</span>  <span class="keywordflow">if</span> (<a class="code" href="classCSolver.html#af74159b82e953b3b766001d27b8b7981">_decision_hook</a>) {</div>
<div class="line"><a name="l00666"></a><span class="lineno"> 666</span>  decide:</div>
<div class="line"><a name="l00667"></a><span class="lineno"> 667</span>  s_var2 = (*_decision_hook)(<a class="code" href="classCSolver.html#a2a02aeed8e6eefe8b1d8a661c7e94c45">_decision_hook_cookie</a>, &done);</div>
<div class="line"><a name="l00668"></a><span class="lineno"> 668</span>  <span class="keywordflow">if</span> (done) {</div>
<div class="line"><a name="l00669"></a><span class="lineno"> 669</span>  <span class="keywordflow">if</span> (s_var2 == -1) {</div>
<div class="line"><a name="l00670"></a><span class="lineno"> 670</span>  <span class="comment">// No more decisions</span></div>
<div class="line"><a name="l00671"></a><span class="lineno"> 671</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00672"></a><span class="lineno"> 672</span>  }</div>
<div class="line"><a name="l00673"></a><span class="lineno"> 673</span>  <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00674"></a><span class="lineno"> 674</span>  <span class="comment">// check for more work</span></div>
<div class="line"><a name="l00675"></a><span class="lineno"> 675</span>  <span class="keywordflow">if</span> (!<a class="code" href="classCSolver.html#aeab7cd8f6085990a2a1ed518c9d75c6e">_implication_queue</a>.empty() ||</div>
<div class="line"><a name="l00676"></a><span class="lineno"> 676</span>  <a class="code" href="classCSolver.html#a6bba00c21025040cc46a0499eaea7f01">_conflicts</a>.size() != 0)</div>
<div class="line"><a name="l00677"></a><span class="lineno"> 677</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00678"></a><span class="lineno"> 678</span>  <span class="keywordflow">else</span> <span class="keywordflow">goto</span> decide;</div>
<div class="line"><a name="l00679"></a><span class="lineno"> 679</span>  }</div>
<div class="line"><a name="l00680"></a><span class="lineno"> 680</span>  }</div>
<div class="line"><a name="l00681"></a><span class="lineno"> 681</span>  <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00682"></a><span class="lineno"> 682</span>  <span class="keywordflow">if</span> (s_var2 == -1) {</div>
<div class="line"><a name="l00683"></a><span class="lineno"> 683</span>  <span class="comment">// use SAT choice</span></div>
<div class="line"><a name="l00684"></a><span class="lineno"> 684</span>  }</div>
<div class="line"><a name="l00685"></a><span class="lineno"> 685</span>  <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00686"></a><span class="lineno"> 686</span>  <span class="comment">// use decision</span></div>
<div class="line"><a name="l00687"></a><span class="lineno"> 687</span>  s_var = s_var2;</div>
<div class="line"><a name="l00688"></a><span class="lineno"> 688</span>  }</div>
<div class="line"><a name="l00689"></a><span class="lineno"> 689</span>  }</div>
<div class="line"><a name="l00690"></a><span class="lineno"> 690</span>  }</div>
<div class="line"><a name="l00691"></a><span class="lineno"> 691</span> </div>
<div class="line"><a name="l00692"></a><span class="lineno"> 692</span>  <span class="keywordflow">if</span> (s_var<2) <span class="comment">//no more free vars, solution found, quit</span></div>
<div class="line"><a name="l00693"></a><span class="lineno"> 693</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00694"></a><span class="lineno"> 694</span>  ++<a class="code" href="classCSolver.html#ad51e4ee566b488f8d3610890f3fa1bb7">dlevel</a>();</div>
<div class="line"><a name="l00695"></a><span class="lineno"> 695</span>  <span class="keywordflow">if</span> (<a class="code" href="classCSolver.html#ad517659e82e1b42617886d2b6758acd3">_dlevel_hook</a>) {</div>
<div class="line"><a name="l00696"></a><span class="lineno"> 696</span>  (*_dlevel_hook)(<a class="code" href="classCSolver.html#ad1e4bd711ad507a40d36d5815bdaa69c">_dlevel_hook_cookie</a>, 1);</div>
<div class="line"><a name="l00697"></a><span class="lineno"> 697</span>  }</div>
<div class="line"><a name="l00698"></a><span class="lineno"> 698</span>  <span class="keywordflow">if</span> (<a class="code" href="classCSolver.html#ad51e4ee566b488f8d3610890f3fa1bb7">dlevel</a>() > <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#a859161eb057e8035f34ea5fca4d65075">max_dlevel</a>) <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#a859161eb057e8035f34ea5fca4d65075">max_dlevel</a> = <a class="code" href="classCSolver.html#ad51e4ee566b488f8d3610890f3fa1bb7">dlevel</a>();</div>
<div class="line"><a name="l00699"></a><span class="lineno"> 699</span>  <a class="code" href="xchaff__utils_8h.html#a763ffd798508592c5092ac77daa5a659">CHECK</a> (cout << <span class="stringliteral">"**Decision at Level "</span> << <a class="code" href="classCSolver.html#ad51e4ee566b488f8d3610890f3fa1bb7">dlevel</a>() ;</div>
<div class="line"><a name="l00700"></a><span class="lineno"> 700</span>  cout <<<span class="stringliteral">": "</span> << s_var << <span class="stringliteral">"\te.g. "</span> << (s_var&0x1?<span class="stringliteral">"-"</span>:<span class="stringliteral">" "</span>) ;</div>
<div class="line"><a name="l00701"></a><span class="lineno"> 701</span>  cout <<(s_var>>1) << <a class="code" href="group__ExprStream__Manip.html#ga05b0ea7353ec24fa8e7e272d7a7875d8" title="Print the end-of-line.">endl</a>; );</div>
<div class="line"><a name="l00702"></a><span class="lineno"> 702</span>  <a class="code" href="classCSolver.html#a21e170987f92adbe179f39ffe3c861be">queue_implication</a>(s_var, <a class="code" href="xchaff__base_8h.html#abd4c1edc3bf20c1f93ebaca33c9b2b64">NULL_CLAUSE</a>);</div>
<div class="line"><a name="l00703"></a><span class="lineno"> 703</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00704"></a><span class="lineno"> 704</span> }</div>
<div class="line"><a name="l00705"></a><span class="lineno"> 705</span> </div>
<div class="line"><a name="l00706"></a><span class="lineno"><a class="code" href="classCSolver.html#aef7418705a19f94876ab5c708e87e15c"> 706</a></span> <span class="keywordtype">int</span> <a class="code" href="classCSolver.html#aef7418705a19f94876ab5c708e87e15c">CSolver::preprocess</a>(<span class="keywordtype">bool</span> allowNewClauses) </div>
<div class="line"><a name="l00707"></a><span class="lineno"> 707</span> {</div>
<div class="line"><a name="l00708"></a><span class="lineno"> 708</span>  <span class="comment">//1. detect all the unused variables</span></div>
<div class="line"><a name="l00709"></a><span class="lineno"> 709</span>  <span class="keywordflow">if</span> (!allowNewClauses) {</div>
<div class="line"><a name="l00710"></a><span class="lineno"> 710</span>  vector<int> un_used;</div>
<div class="line"><a name="l00711"></a><span class="lineno"> 711</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i=1, sz=<a class="code" href="classCDatabase.html#af4388cf12d2984898332c519b220d67b">variables</a>().size(); i<sz; ++i) {</div>
<div class="line"><a name="l00712"></a><span class="lineno"> 712</span>  <a class="code" href="classCVariable.html">CVariable</a> & v = <a class="code" href="classCDatabase.html#af421024d0ade14743332069684aba162">variable</a>(i);</div>
<div class="line"><a name="l00713"></a><span class="lineno"> 713</span>  <span class="keywordflow">if</span> (v.<a class="code" href="classCVariable.html#a200c0dd2b0b7cadd109b662fb20ec889">lits_count</a>(0) == 0 && v.<a class="code" href="classCVariable.html#a200c0dd2b0b7cadd109b662fb20ec889">lits_count</a>(1) == 0) {</div>
<div class="line"><a name="l00714"></a><span class="lineno"> 714</span>  un_used.push_back(i);</div>
<div class="line"><a name="l00715"></a><span class="lineno"> 715</span>  v.<a class="code" href="classCVariable.html#a7319394585df665256e74df1282f992f">value</a>() = 1; </div>
<div class="line"><a name="l00716"></a><span class="lineno"> 716</span>  v.<a class="code" href="classCVariable.html#aedac20571208b480adb2aff58797981a">dlevel</a>() = -1;</div>
<div class="line"><a name="l00717"></a><span class="lineno"> 717</span>  }</div>
<div class="line"><a name="l00718"></a><span class="lineno"> 718</span>  }</div>
<div class="line"><a name="l00719"></a><span class="lineno"> 719</span>  <a class="code" href="classCSolver.html#a5b1c1a111284ece5745488b12baef8b2">num_free_variables</a>() -= un_used.size();</div>
<div class="line"><a name="l00720"></a><span class="lineno"> 720</span>  <span class="keywordflow">if</span> (<a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#adaaa1d95214368e99b13ac36cbb16dea">verbosity</a>>1 && un_used.size() > 0) {</div>
<div class="line"><a name="l00721"></a><span class="lineno"> 721</span>  cout << un_used.size()<< <span class="stringliteral">" Variables are defined but not used "</span> << <a class="code" href="group__ExprStream__Manip.html#ga05b0ea7353ec24fa8e7e272d7a7875d8" title="Print the end-of-line.">endl</a>;</div>
<div class="line"><a name="l00722"></a><span class="lineno"> 722</span>  <span class="keywordflow">if</span> (<a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#adaaa1d95214368e99b13ac36cbb16dea">verbosity</a> > 2) {</div>
<div class="line"><a name="l00723"></a><span class="lineno"> 723</span>  <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> i=0; i< un_used.size(); ++i)</div>
<div class="line"><a name="l00724"></a><span class="lineno"> 724</span>  cout << un_used[i] << <span class="stringliteral">" "</span>;</div>
<div class="line"><a name="l00725"></a><span class="lineno"> 725</span>  cout << <a class="code" href="group__ExprStream__Manip.html#ga05b0ea7353ec24fa8e7e272d7a7875d8" title="Print the end-of-line.">endl</a>;</div>
<div class="line"><a name="l00726"></a><span class="lineno"> 726</span>  }</div>
<div class="line"><a name="l00727"></a><span class="lineno"> 727</span>  }</div>
<div class="line"><a name="l00728"></a><span class="lineno"> 728</span>  <span class="comment">//2. detect all variables with only one phase occuring</span></div>
<div class="line"><a name="l00729"></a><span class="lineno"> 729</span>  vector<int> uni_phased;</div>
<div class="line"><a name="l00730"></a><span class="lineno"> 730</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i=1, sz=<a class="code" href="classCDatabase.html#af4388cf12d2984898332c519b220d67b">variables</a>().size(); i<sz; ++i) {</div>
<div class="line"><a name="l00731"></a><span class="lineno"> 731</span>  <a class="code" href="classCVariable.html">CVariable</a> & v = <a class="code" href="classCDatabase.html#af421024d0ade14743332069684aba162">variable</a>(i);</div>
<div class="line"><a name="l00732"></a><span class="lineno"> 732</span>  <span class="keywordflow">if</span> (v.<a class="code" href="classCVariable.html#a7319394585df665256e74df1282f992f">value</a>() != <a class="code" href="xchaff__base_8h.html#a915d220aba4527d1e33010bdfcbc6855a6ce26a62afab55d7606ad4e92428b30c">UNKNOWN</a>)</div>
<div class="line"><a name="l00733"></a><span class="lineno"> 733</span>  <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l00734"></a><span class="lineno"> 734</span>  <span class="keywordflow">if</span> (v.<a class="code" href="classCVariable.html#a200c0dd2b0b7cadd109b662fb20ec889">lits_count</a>(0) == 0){ <span class="comment">//no positive phased lits.</span></div>
<div class="line"><a name="l00735"></a><span class="lineno"> 735</span>  <a class="code" href="classCSolver.html#a21e170987f92adbe179f39ffe3c861be">queue_implication</a>( i+i+1, <a class="code" href="xchaff__base_8h.html#abd4c1edc3bf20c1f93ebaca33c9b2b64">NULL_CLAUSE</a>);</div>
<div class="line"><a name="l00736"></a><span class="lineno"> 736</span>  uni_phased.push_back(-i);</div>
<div class="line"><a name="l00737"></a><span class="lineno"> 737</span>  }</div>
<div class="line"><a name="l00738"></a><span class="lineno"> 738</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (v.<a class="code" href="classCVariable.html#a200c0dd2b0b7cadd109b662fb20ec889">lits_count</a>(1) == 0){ <span class="comment">//no negative phased lits.</span></div>
<div class="line"><a name="l00739"></a><span class="lineno"> 739</span>  <a class="code" href="classCSolver.html#a21e170987f92adbe179f39ffe3c861be">queue_implication</a>( i+i, <a class="code" href="xchaff__base_8h.html#abd4c1edc3bf20c1f93ebaca33c9b2b64">NULL_CLAUSE</a>);</div>
<div class="line"><a name="l00740"></a><span class="lineno"> 740</span>  uni_phased.push_back(i);</div>
<div class="line"><a name="l00741"></a><span class="lineno"> 741</span>  }</div>
<div class="line"><a name="l00742"></a><span class="lineno"> 742</span>  }</div>
<div class="line"><a name="l00743"></a><span class="lineno"> 743</span>  <span class="keywordflow">if</span> (<a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#adaaa1d95214368e99b13ac36cbb16dea">verbosity</a>>1 && uni_phased.size() > 0) {</div>
<div class="line"><a name="l00744"></a><span class="lineno"> 744</span>  cout << uni_phased.size()<< <span class="stringliteral">" Variables only appear in one phase."</span> << <a class="code" href="group__ExprStream__Manip.html#ga05b0ea7353ec24fa8e7e272d7a7875d8" title="Print the end-of-line.">endl</a>;</div>
<div class="line"><a name="l00745"></a><span class="lineno"> 745</span>  <span class="keywordflow">if</span> (<a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#adaaa1d95214368e99b13ac36cbb16dea">verbosity</a> > 2) {</div>
<div class="line"><a name="l00746"></a><span class="lineno"> 746</span>  <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> i=0; i< uni_phased.size(); ++i)</div>
<div class="line"><a name="l00747"></a><span class="lineno"> 747</span>  cout << uni_phased[i] << <span class="stringliteral">" "</span>;</div>
<div class="line"><a name="l00748"></a><span class="lineno"> 748</span>  cout <<<a class="code" href="group__ExprStream__Manip.html#ga05b0ea7353ec24fa8e7e272d7a7875d8" title="Print the end-of-line.">endl</a>;</div>
<div class="line"><a name="l00749"></a><span class="lineno"> 749</span>  }</div>
<div class="line"><a name="l00750"></a><span class="lineno"> 750</span>  }</div>
<div class="line"><a name="l00751"></a><span class="lineno"> 751</span>  }</div>
<div class="line"><a name="l00752"></a><span class="lineno"> 752</span>  <span class="comment">//3. detect all the unit clauses</span></div>
<div class="line"><a name="l00753"></a><span class="lineno"> 753</span>  <span class="keywordflow">for</span> (<a class="code" href="xchaff__base_8h.html#a10b9683e115e9c10c0874794507db545">ClauseIdx</a> i=0, sz=<a class="code" href="classCDatabase.html#a0c2329a20ee0a2672475933c3edd888e">clauses</a>().size(); i<sz; ++i) {</div>
<div class="line"><a name="l00754"></a><span class="lineno"> 754</span>  <span class="keywordflow">if</span> (<a class="code" href="classCDatabase.html#a5af3586dfcd579ab14d37c6b6cf75e18">clause</a>(i).<a class="code" href="classCClause.html#ae4f9f5a951b75aab530b5b05a3232082">num_lits</a>() == 1){ <span class="comment">//unit clause</span></div>
<div class="line"><a name="l00755"></a><span class="lineno"> 755</span>  <a class="code" href="classCSolver.html#a21e170987f92adbe179f39ffe3c861be">queue_implication</a>(<a class="code" href="classCDatabase.html#a3e469952453c4b10f1040e9a19375f77">find_unit_literal</a>(i), i);</div>
<div class="line"><a name="l00756"></a><span class="lineno"> 756</span>  }</div>
<div class="line"><a name="l00757"></a><span class="lineno"> 757</span>  }</div>
<div class="line"><a name="l00758"></a><span class="lineno"> 758</span> </div>
<div class="line"><a name="l00759"></a><span class="lineno"> 759</span>  <span class="keywordflow">if</span>(<a class="code" href="classCSolver.html#a769075f3a6ed6eab6e4ec9e93c964f89">deduce</a>()==<a class="code" href="xchaff__solver_8h.html#a7b6c2d7ebb99756fa23352708c089b25a3124eeef4801cbb117a96b9e4a0d7eb7">CONFLICT</a>) <span class="keywordflow">return</span> <a class="code" href="xchaff__solver_8h.html#a7b6c2d7ebb99756fa23352708c089b25a3124eeef4801cbb117a96b9e4a0d7eb7">CONFLICT</a>;</div>
<div class="line"><a name="l00760"></a><span class="lineno"> 760</span>  <span class="keywordflow">return</span> <a class="code" href="xchaff__solver_8h.html#a7b6c2d7ebb99756fa23352708c089b25a7980b2b643aebe4041a43b90e652c3fc">NO_CONFLICT</a>; </div>
<div class="line"><a name="l00761"></a><span class="lineno"> 761</span> }</div>
<div class="line"><a name="l00762"></a><span class="lineno"> 762</span> </div>
<div class="line"><a name="l00763"></a><span class="lineno"><a class="code" href="classCSolver.html#af5c60a4d643467e199c00415fedc7e1d"> 763</a></span> <span class="keywordtype">void</span> <a class="code" href="classCSolver.html#af5c60a4d643467e199c00415fedc7e1d">CSolver::real_solve</a>(<span class="keywordtype">void</span>)</div>
<div class="line"><a name="l00764"></a><span class="lineno"> 764</span> {</div>
<div class="line"><a name="l00765"></a><span class="lineno"> 765</span>  <span class="keywordflow">while</span>(1) {</div>
<div class="line"><a name="l00766"></a><span class="lineno"> 766</span>  <a class="code" href="classCSolver.html#a0ffdf7d6d085ca70b50391598bf4c543">run_periodic_functions</a>();</div>
<div class="line"><a name="l00767"></a><span class="lineno"> 767</span>  <span class="keywordflow">if</span> (<a class="code" href="classCSolver.html#a752f7912bef54fb9f310cbeeabc34543">decide_next_branch</a>() || !<a class="code" href="classCSolver.html#aeab7cd8f6085990a2a1ed518c9d75c6e">_implication_queue</a>.empty() ||</div>
<div class="line"><a name="l00768"></a><span class="lineno"> 768</span>  <a class="code" href="classCSolver.html#a6bba00c21025040cc46a0499eaea7f01">_conflicts</a>.size() != 0) {</div>
<div class="line"><a name="l00769"></a><span class="lineno"> 769</span>  <span class="keywordflow">while</span> (<a class="code" href="classCSolver.html#a769075f3a6ed6eab6e4ec9e93c964f89">deduce</a>()==<a class="code" href="xchaff__solver_8h.html#a7b6c2d7ebb99756fa23352708c089b25a3124eeef4801cbb117a96b9e4a0d7eb7">CONFLICT</a>) { </div>
<div class="line"><a name="l00770"></a><span class="lineno"> 770</span>  <span class="keywordtype">int</span> blevel = <a class="code" href="classCSolver.html#a2d476175cdda3b0028fb0efd754630d6">analyze_conflicts</a>();</div>
<div class="line"><a name="l00771"></a><span class="lineno"> 771</span>  <span class="keywordflow">if</span> (blevel <= 0) {</div>
<div class="line"><a name="l00772"></a><span class="lineno"> 772</span>  <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#a457807a12c793c4ff53a56aefe246d51">outcome</a> = <a class="code" href="xchaff__solver_8h.html#a259c70233f322b3e490149190b8bb87ba709691b4dfbbba6c6f992a7cd34dd0e9">UNSATISFIABLE</a>;</div>
<div class="line"><a name="l00773"></a><span class="lineno"> 773</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00774"></a><span class="lineno"> 774</span>  }</div>
<div class="line"><a name="l00775"></a><span class="lineno"> 775</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<a class="code" href="classCSolver.html#a6b12fb5fcb0e279221c4047b3a61d99e">_addedUnitClauses</a>.size()) {</div>
<div class="line"><a name="l00776"></a><span class="lineno"> 776</span>  <span class="comment">// reassert added unit clauses</span></div>
<div class="line"><a name="l00777"></a><span class="lineno"> 777</span>  <span class="keywordtype">unsigned</span> idx = <a class="code" href="classCSolver.html#a6b12fb5fcb0e279221c4047b3a61d99e">_addedUnitClauses</a>.size()-1;</div>
<div class="line"><a name="l00778"></a><span class="lineno"> 778</span>  <a class="code" href="xchaff__base_8h.html#a10b9683e115e9c10c0874794507db545">ClauseIdx</a> cl = <a class="code" href="classCSolver.html#a6b12fb5fcb0e279221c4047b3a61d99e">_addedUnitClauses</a>.back();</div>
<div class="line"><a name="l00779"></a><span class="lineno"> 779</span>  <span class="keywordtype">int</span> lit = <a class="code" href="classCDatabase.html#a3e469952453c4b10f1040e9a19375f77">find_unit_literal</a>(cl);</div>
<div class="line"><a name="l00780"></a><span class="lineno"> 780</span>  <span class="keywordflow">while</span> (lit != 0) {</div>
<div class="line"><a name="l00781"></a><span class="lineno"> 781</span>  <a class="code" href="classCSolver.html#a21e170987f92adbe179f39ffe3c861be">queue_implication</a>(lit, cl);</div>
<div class="line"><a name="l00782"></a><span class="lineno"> 782</span>  <span class="keywordflow">if</span> (idx == 0) <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00783"></a><span class="lineno"> 783</span>  cl = <a class="code" href="classCSolver.html#a6b12fb5fcb0e279221c4047b3a61d99e">_addedUnitClauses</a>[--idx];</div>
<div class="line"><a name="l00784"></a><span class="lineno"> 784</span>  lit = <a class="code" href="classCDatabase.html#a3e469952453c4b10f1040e9a19375f77">find_unit_literal</a>(cl);</div>
<div class="line"><a name="l00785"></a><span class="lineno"> 785</span>  }</div>
<div class="line"><a name="l00786"></a><span class="lineno"> 786</span>  }</div>
<div class="line"><a name="l00787"></a><span class="lineno"> 787</span>  }</div>
<div class="line"><a name="l00788"></a><span class="lineno"> 788</span>  }</div>
<div class="line"><a name="l00789"></a><span class="lineno"> 789</span>  <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00790"></a><span class="lineno"> 790</span>  <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#a457807a12c793c4ff53a56aefe246d51">outcome</a> = <a class="code" href="xchaff__solver_8h.html#a259c70233f322b3e490149190b8bb87baa6a5c07f8c320f440ebc34fed65eb550">SATISFIABLE</a>;</div>
<div class="line"><a name="l00791"></a><span class="lineno"> 791</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00792"></a><span class="lineno"> 792</span>  }</div>
<div class="line"><a name="l00793"></a><span class="lineno"> 793</span>  <span class="keywordflow">if</span> (<a class="code" href="classCSolver.html#af3b17269840c1a07e21303c1fca4e5a0">time_out</a>()) { </div>
<div class="line"><a name="l00794"></a><span class="lineno"> 794</span>  <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#a457807a12c793c4ff53a56aefe246d51">outcome</a> = <a class="code" href="xchaff__solver_8h.html#a259c70233f322b3e490149190b8bb87ba52acca9974adc722d8bdd782fec68b55">TIME_OUT</a>;</div>
<div class="line"><a name="l00795"></a><span class="lineno"> 795</span>  <span class="keywordflow">return</span>; </div>
<div class="line"><a name="l00796"></a><span class="lineno"> 796</span>  }</div>
<div class="line"><a name="l00797"></a><span class="lineno"> 797</span>  <span class="keywordflow">if</span> (<a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#ab5c8d00ed96f235136c96197230a09c7">is_mem_out</a>) {</div>
<div class="line"><a name="l00798"></a><span class="lineno"> 798</span>  <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#a457807a12c793c4ff53a56aefe246d51">outcome</a> = <a class="code" href="xchaff__solver_8h.html#a259c70233f322b3e490149190b8bb87baff91e7382744a3692b5e8b812c24f9dd">MEM_OUT</a>;</div>
<div class="line"><a name="l00799"></a><span class="lineno"> 799</span>  <span class="keywordflow">return</span>; </div>
<div class="line"><a name="l00800"></a><span class="lineno"> 800</span>  }</div>
<div class="line"><a name="l00801"></a><span class="lineno"> 801</span>  }</div>
<div class="line"><a name="l00802"></a><span class="lineno"> 802</span> }</div>
<div class="line"><a name="l00803"></a><span class="lineno"> 803</span> </div>
<div class="line"><a name="l00804"></a><span class="lineno"><a class="code" href="classCSolver.html#a351fe372330bede0ada8c3723e844a8e"> 804</a></span> <span class="keywordtype">int</span> <a class="code" href="classCSolver.html#a351fe372330bede0ada8c3723e844a8e">CSolver::solve</a>(<span class="keywordtype">bool</span> allowNewClauses)</div>
<div class="line"><a name="l00805"></a><span class="lineno"> 805</span> {</div>
<div class="line"><a name="l00806"></a><span class="lineno"> 806</span>  <a class="code" href="classCSolver.html#a711b6b701409a5a5fa54dd54b609328b">init</a>();</div>
<div class="line"><a name="l00807"></a><span class="lineno"> 807</span>  <span class="comment">//preprocess </span></div>
<div class="line"><a name="l00808"></a><span class="lineno"> 808</span>  <span class="keywordflow">if</span>(<a class="code" href="classCSolver.html#aef7418705a19f94876ab5c708e87e15c">preprocess</a>(allowNewClauses)==<a class="code" href="xchaff__solver_8h.html#a7b6c2d7ebb99756fa23352708c089b25a3124eeef4801cbb117a96b9e4a0d7eb7">CONFLICT</a>) {</div>
<div class="line"><a name="l00809"></a><span class="lineno"> 809</span>  <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#a457807a12c793c4ff53a56aefe246d51">outcome</a> = <a class="code" href="xchaff__solver_8h.html#a259c70233f322b3e490149190b8bb87ba709691b4dfbbba6c6f992a7cd34dd0e9">UNSATISFIABLE</a>;</div>
<div class="line"><a name="l00810"></a><span class="lineno"> 810</span>  }</div>
<div class="line"><a name="l00811"></a><span class="lineno"> 811</span>  <span class="keywordflow">else</span> { <span class="comment">//the real search</span></div>
<div class="line"><a name="l00812"></a><span class="lineno"> 812</span>  <span class="keywordflow">if</span> (<a class="code" href="classCSolver.html#ad517659e82e1b42617886d2b6758acd3">_dlevel_hook</a>) {</div>
<div class="line"><a name="l00813"></a><span class="lineno"> 813</span>  (*_dlevel_hook)(<a class="code" href="classCSolver.html#ad1e4bd711ad507a40d36d5815bdaa69c">_dlevel_hook_cookie</a>, 1);</div>
<div class="line"><a name="l00814"></a><span class="lineno"> 814</span>  }</div>
<div class="line"><a name="l00815"></a><span class="lineno"> 815</span>  <a class="code" href="classCSolver.html#af5c60a4d643467e199c00415fedc7e1d">real_solve</a>();</div>
<div class="line"><a name="l00816"></a><span class="lineno"> 816</span>  }</div>
<div class="line"><a name="l00817"></a><span class="lineno"> 817</span>  <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#af6278310a2420aa873287185f2625af8">finish_cpu_time</a> = <a class="code" href="classCSolver.html#a7d23251aefbab59adac9658723ac60ad">current_cpu_time</a>();</div>
<div class="line"><a name="l00818"></a><span class="lineno"> 818</span>  <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#a7e0257bf7aca5d36a9329827237ffd19">finish_world_time</a> = <a class="code" href="classCSolver.html#a4fc755c9adedc2769461bacfc8532f9e">current_world_time</a>();</div>
<div class="line"><a name="l00819"></a><span class="lineno"> 819</span>  <span class="keywordflow">return</span> <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#a457807a12c793c4ff53a56aefe246d51">outcome</a>;</div>
<div class="line"><a name="l00820"></a><span class="lineno"> 820</span> }</div>
<div class="line"><a name="l00821"></a><span class="lineno"> 821</span> </div>
<div class="line"><a name="l00822"></a><span class="lineno"><a class="code" href="classCSolver.html#a9119faa6145fead463e8b14ec2f7cf7b"> 822</a></span> <span class="keywordtype">int</span> <a class="code" href="classCSolver.html#a9119faa6145fead463e8b14ec2f7cf7b">CSolver::continueCheck</a>()</div>
<div class="line"><a name="l00823"></a><span class="lineno"> 823</span> {</div>
<div class="line"><a name="l00824"></a><span class="lineno"> 824</span>  <a class="code" href="classCSolver.html#af5c60a4d643467e199c00415fedc7e1d">real_solve</a>();</div>
<div class="line"><a name="l00825"></a><span class="lineno"> 825</span>  <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#af6278310a2420aa873287185f2625af8">finish_cpu_time</a> = <a class="code" href="classCSolver.html#a7d23251aefbab59adac9658723ac60ad">current_cpu_time</a>();</div>
<div class="line"><a name="l00826"></a><span class="lineno"> 826</span>  <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#a7e0257bf7aca5d36a9329827237ffd19">finish_world_time</a> = <a class="code" href="classCSolver.html#a4fc755c9adedc2769461bacfc8532f9e">current_world_time</a>();</div>
<div class="line"><a name="l00827"></a><span class="lineno"> 827</span>  <span class="keywordflow">return</span> <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#a457807a12c793c4ff53a56aefe246d51">outcome</a>;</div>
<div class="line"><a name="l00828"></a><span class="lineno"> 828</span> }</div>
<div class="line"><a name="l00829"></a><span class="lineno"> 829</span> </div>
<div class="line"><a name="l00830"></a><span class="lineno"><a class="code" href="classCSolver.html#a48ffc1b95c078bcc0bb748f1068479fd"> 830</a></span> <span class="keywordtype">void</span> <a class="code" href="classCSolver.html#a48ffc1b95c078bcc0bb748f1068479fd">CSolver::back_track</a>(<span class="keywordtype">int</span> blevel)</div>
<div class="line"><a name="l00831"></a><span class="lineno"> 831</span> {</div>
<div class="line"><a name="l00832"></a><span class="lineno"> 832</span>  <a class="code" href="xchaff__utils_8h.html#a763ffd798508592c5092ac77daa5a659">CHECK</a> (cout << <span class="stringliteral">"Back track to "</span> << blevel <<<span class="stringliteral">" ,currently in "</span><< <a class="code" href="classCSolver.html#ad51e4ee566b488f8d3610890f3fa1bb7">dlevel</a>() << <span class="stringliteral">" level"</span> << <a class="code" href="group__ExprStream__Manip.html#ga05b0ea7353ec24fa8e7e272d7a7875d8" title="Print the end-of-line.">endl</a>;);</div>
<div class="line"><a name="l00833"></a><span class="lineno"> 833</span>  <a class="code" href="xchaff__utils_8h.html#a6683569480fcdbf7931a984f2738731c">CHECK_FULL</a> (<a class="code" href="classCSolver.html#a8804888a9795945f5b09c67c529b898d">dump</a>());</div>
<div class="line"><a name="l00834"></a><span class="lineno"> 834</span>  <a class="code" href="xchaff__utils_8h.html#a763ffd798508592c5092ac77daa5a659">CHECK</a>(<a class="code" href="classCSolver.html#ac14b7728d00ff497795bcedfd3f24faa">verify_integrity</a>());</div>
<div class="line"><a name="l00835"></a><span class="lineno"> 835</span>  assert(blevel <= <a class="code" href="classCSolver.html#ad51e4ee566b488f8d3610890f3fa1bb7">dlevel</a>());</div>
<div class="line"><a name="l00836"></a><span class="lineno"> 836</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i=<a class="code" href="classCSolver.html#ad51e4ee566b488f8d3610890f3fa1bb7">dlevel</a>(); i>= blevel; --i) {</div>
<div class="line"><a name="l00837"></a><span class="lineno"> 837</span>  vector<int> & assignments = *<a class="code" href="classCSolver.html#a6a21ab9d2ab20a5c4f103cc1a337e35f">_assignment_stack</a>[i];</div>
<div class="line"><a name="l00838"></a><span class="lineno"> 838</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j=assignments.size()-1 ; j>=0; --j) </div>
<div class="line"><a name="l00839"></a><span class="lineno"> 839</span>  <a class="code" href="classCSolver.html#a78ae7136f91966fdc7a55af71060875c">unset_var_value</a>(assignments[j]>>1);</div>
<div class="line"><a name="l00840"></a><span class="lineno"> 840</span>  <a class="code" href="classCSolver.html#a5b1c1a111284ece5745488b12baef8b2">num_free_variables</a>() += assignments.size();</div>
<div class="line"><a name="l00841"></a><span class="lineno"> 841</span>  assignments.clear();</div>
<div class="line"><a name="l00842"></a><span class="lineno"> 842</span>  <span class="keywordflow">if</span> (<a class="code" href="classCSolver.html#ad517659e82e1b42617886d2b6758acd3">_dlevel_hook</a>) {</div>
<div class="line"><a name="l00843"></a><span class="lineno"> 843</span>  (*_dlevel_hook)(<a class="code" href="classCSolver.html#ad1e4bd711ad507a40d36d5815bdaa69c">_dlevel_hook_cookie</a>, -1);</div>
<div class="line"><a name="l00844"></a><span class="lineno"> 844</span>  }</div>
<div class="line"><a name="l00845"></a><span class="lineno"> 845</span>  }</div>
<div class="line"><a name="l00846"></a><span class="lineno"> 846</span>  <a class="code" href="classCSolver.html#ad51e4ee566b488f8d3610890f3fa1bb7">dlevel</a>() = blevel - 1;</div>
<div class="line"><a name="l00847"></a><span class="lineno"> 847</span>  ++<a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#a25040e610686ab4e75a582de624946db">num_backtracks</a>;</div>
<div class="line"><a name="l00848"></a><span class="lineno"> 848</span>  <a class="code" href="xchaff__utils_8h.html#a6683569480fcdbf7931a984f2738731c">CHECK_FULL</a> (<a class="code" href="classCSolver.html#a8804888a9795945f5b09c67c529b898d">dump</a>());</div>
<div class="line"><a name="l00849"></a><span class="lineno"> 849</span>  <a class="code" href="xchaff__utils_8h.html#a763ffd798508592c5092ac77daa5a659">CHECK</a>(<a class="code" href="classCSolver.html#ac14b7728d00ff497795bcedfd3f24faa">verify_integrity</a>());</div>
<div class="line"><a name="l00850"></a><span class="lineno"> 850</span> }</div>
<div class="line"><a name="l00851"></a><span class="lineno"> 851</span> </div>
<div class="line"><a name="l00852"></a><span class="lineno"><a class="code" href="classCSolver.html#a769075f3a6ed6eab6e4ec9e93c964f89"> 852</a></span> <span class="keywordtype">int</span> <a class="code" href="classCSolver.html#a769075f3a6ed6eab6e4ec9e93c964f89">CSolver::deduce</a>(<span class="keywordtype">void</span>) </div>
<div class="line"><a name="l00853"></a><span class="lineno"> 853</span> {</div>
<div class="line"><a name="l00854"></a><span class="lineno"> 854</span> <a class="code" href="classCSolver.html#a5b9ce0b016266150cad691e4bb475668">restart</a>:</div>
<div class="line"><a name="l00855"></a><span class="lineno"> 855</span>  <span class="keywordflow">while</span> (!<a class="code" href="classCSolver.html#aeab7cd8f6085990a2a1ed518c9d75c6e">_implication_queue</a>.empty() && <a class="code" href="classCSolver.html#a6bba00c21025040cc46a0499eaea7f01">_conflicts</a>.size()==0) {</div>
<div class="line"><a name="l00856"></a><span class="lineno"> 856</span>  <span class="keywordtype">int</span> literal = <a class="code" href="classCSolver.html#aeab7cd8f6085990a2a1ed518c9d75c6e">_implication_queue</a>.front().first;</div>
<div class="line"><a name="l00857"></a><span class="lineno"> 857</span>  <span class="keywordtype">int</span> variable_index = literal>>1;</div>
<div class="line"><a name="l00858"></a><span class="lineno"> 858</span>  <a class="code" href="xchaff__base_8h.html#a10b9683e115e9c10c0874794507db545">ClauseIdx</a> cl = <a class="code" href="classCSolver.html#aeab7cd8f6085990a2a1ed518c9d75c6e">_implication_queue</a>.front().second;</div>
<div class="line"><a name="l00859"></a><span class="lineno"> 859</span>  <a class="code" href="classCSolver.html#aeab7cd8f6085990a2a1ed518c9d75c6e">_implication_queue</a>.pop();</div>
<div class="line"><a name="l00860"></a><span class="lineno"> 860</span>  <a class="code" href="classCVariable.html">CVariable</a> * the_var = &(<a class="code" href="classCDatabase.html#af4388cf12d2984898332c519b220d67b">variables</a>()[variable_index]);</div>
<div class="line"><a name="l00861"></a><span class="lineno"> 861</span>  <span class="keywordflow">if</span> ( the_var-><a class="code" href="classCVariable.html#a7319394585df665256e74df1282f992f">value</a>() == <a class="code" href="xchaff__base_8h.html#a915d220aba4527d1e33010bdfcbc6855a6ce26a62afab55d7606ad4e92428b30c">UNKNOWN</a>) { <span class="comment">// an implication</span></div>
<div class="line"><a name="l00862"></a><span class="lineno"> 862</span>  <span class="keywordtype">int</span> dl;</div>
<div class="line"><a name="l00863"></a><span class="lineno"> 863</span>  <span class="keywordflow">if</span> (<a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a3e90abca92fa570f9d1dc5ce49b01daa">back_track_complete</a>)</div>
<div class="line"><a name="l00864"></a><span class="lineno"> 864</span>  dl = <a class="code" href="classCSolver.html#ad51e4ee566b488f8d3610890f3fa1bb7">dlevel</a>();</div>
<div class="line"><a name="l00865"></a><span class="lineno"> 865</span>  <span class="keywordflow">else</span> </div>
<div class="line"><a name="l00866"></a><span class="lineno"> 866</span>  dl = <a class="code" href="classCSolver.html#a15a8ac75d8da0e7e47c0643870b3bcc9">find_max_clause_dlevel</a>(cl);</div>
<div class="line"><a name="l00867"></a><span class="lineno"> 867</span>  <a class="code" href="classCSolver.html#ac06f1192d14de7730356cc102ebaee1b">set_var_value</a>(variable_index, !(literal&0x1), cl, dl);</div>
<div class="line"><a name="l00868"></a><span class="lineno"> 868</span>  the_var = &(<a class="code" href="classCDatabase.html#af4388cf12d2984898332c519b220d67b">variables</a>()[variable_index]);</div>
<div class="line"><a name="l00869"></a><span class="lineno"> 869</span>  <a class="code" href="classCSolver.html#a6a21ab9d2ab20a5c4f103cc1a337e35f">_assignment_stack</a>[dl]->push_back(literal);</div>
<div class="line"><a name="l00870"></a><span class="lineno"> 870</span>  <a class="code" href="xchaff__utils_8h.html#a763ffd798508592c5092ac77daa5a659">CHECK</a>(<a class="code" href="classCSolver.html#ac14b7728d00ff497795bcedfd3f24faa">verify_integrity</a>());</div>
<div class="line"><a name="l00871"></a><span class="lineno"> 871</span>  }</div>
<div class="line"><a name="l00872"></a><span class="lineno"> 872</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (the_var-><a class="code" href="classCVariable.html#a7319394585df665256e74df1282f992f">value</a>() == (literal&0x1) ) { <span class="comment">//a conflict</span></div>
<div class="line"><a name="l00873"></a><span class="lineno"> 873</span>  <span class="comment">//note: literal & 0x1 == 1 means the literal is in negative phase</span></div>
<div class="line"><a name="l00874"></a><span class="lineno"> 874</span>  <a class="code" href="classCSolver.html#a6bba00c21025040cc46a0499eaea7f01">_conflicts</a>.push_back(cl);</div>
<div class="line"><a name="l00875"></a><span class="lineno"> 875</span>  }</div>
<div class="line"><a name="l00876"></a><span class="lineno"> 876</span>  }</div>
<div class="line"><a name="l00877"></a><span class="lineno"> 877</span>  <span class="keywordflow">if</span> (!<a class="code" href="classCSolver.html#a6bba00c21025040cc46a0499eaea7f01">_conflicts</a>.size() && <a class="code" href="classCSolver.html#ac30b332eb58a51d87d9e1f80f62754f8">_deduction_hook</a>) {</div>
<div class="line"><a name="l00878"></a><span class="lineno"> 878</span>  (*_deduction_hook)(<a class="code" href="classCSolver.html#aa2c250ed33c494f50d06122943ae280d">_deduction_hook_cookie</a>);</div>
<div class="line"><a name="l00879"></a><span class="lineno"> 879</span>  <span class="keywordflow">if</span> (!<a class="code" href="classCSolver.html#aeab7cd8f6085990a2a1ed518c9d75c6e">_implication_queue</a>.empty()) <span class="keywordflow">goto</span> <a class="code" href="classCSolver.html#a5b9ce0b016266150cad691e4bb475668">restart</a>;</div>
<div class="line"><a name="l00880"></a><span class="lineno"> 880</span>  }</div>
<div class="line"><a name="l00881"></a><span class="lineno"> 881</span>  <span class="keywordflow">while</span>(!<a class="code" href="classCSolver.html#aeab7cd8f6085990a2a1ed518c9d75c6e">_implication_queue</a>.empty()) <a class="code" href="classCSolver.html#aeab7cd8f6085990a2a1ed518c9d75c6e">_implication_queue</a>.pop();</div>
<div class="line"><a name="l00882"></a><span class="lineno"> 882</span>  <span class="keywordflow">return</span> (<a class="code" href="classCSolver.html#a6bba00c21025040cc46a0499eaea7f01">_conflicts</a>.size()?<a class="code" href="xchaff__solver_8h.html#a7b6c2d7ebb99756fa23352708c089b25a3124eeef4801cbb117a96b9e4a0d7eb7">CONFLICT</a>:<a class="code" href="xchaff__solver_8h.html#a7b6c2d7ebb99756fa23352708c089b25a7980b2b643aebe4041a43b90e652c3fc">NO_CONFLICT</a>);</div>
<div class="line"><a name="l00883"></a><span class="lineno"> 883</span> }</div>
<div class="line"><a name="l00884"></a><span class="lineno"> 884</span> </div>
<div class="line"><a name="l00885"></a><span class="lineno"> 885</span> </div>
<div class="line"><a name="l00886"></a><span class="lineno"><a class="code" href="classCSolver.html#ac14b7728d00ff497795bcedfd3f24faa"> 886</a></span> <span class="keywordtype">void</span> <a class="code" href="classCSolver.html#ac14b7728d00ff497795bcedfd3f24faa">CSolver::verify_integrity</a>(<span class="keywordtype">void</span>) </div>
<div class="line"><a name="l00887"></a><span class="lineno"> 887</span> {</div>
<div class="line"><a name="l00888"></a><span class="lineno"> 888</span> }</div>
<div class="line"><a name="l00889"></a><span class="lineno"> 889</span> </div>
<div class="line"><a name="l00890"></a><span class="lineno"><a class="code" href="classCSolver.html#a525a84f821d273c9883a407c585b8b0d"> 890</a></span> <span class="keywordtype">void</span> <a class="code" href="classCSolver.html#a525a84f821d273c9883a407c585b8b0d">CSolver::mark_vars_at_level</a>(<a class="code" href="xchaff__base_8h.html#a10b9683e115e9c10c0874794507db545">ClauseIdx</a> cl, <span class="keywordtype">int</span> var_idx, <span class="keywordtype">int</span> dl)</div>
<div class="line"><a name="l00891"></a><span class="lineno"> 891</span> {</div>
<div class="line"><a name="l00892"></a><span class="lineno"> 892</span>  <span class="keywordflow">for</span> (<a class="code" href="classCLitPoolElement.html">CLitPoolElement</a> * itr = <a class="code" href="classCDatabase.html#a5af3586dfcd579ab14d37c6b6cf75e18">clause</a>(cl).literals(); (*itr).val() > 0 ; ++ itr) {</div>
<div class="line"><a name="l00893"></a><span class="lineno"> 893</span>  <span class="keywordtype">int</span> v = (*itr).var_index();</div>
<div class="line"><a name="l00894"></a><span class="lineno"> 894</span>  <span class="keywordflow">if</span> (v == var_idx) </div>
<div class="line"><a name="l00895"></a><span class="lineno"> 895</span>  <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l00896"></a><span class="lineno"> 896</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<a class="code" href="classCDatabase.html#af421024d0ade14743332069684aba162">variable</a>(v).<a class="code" href="classCSolver.html#ad51e4ee566b488f8d3610890f3fa1bb7">dlevel</a>() == dl) {</div>
<div class="line"><a name="l00897"></a><span class="lineno"> 897</span>  <span class="keywordflow">if</span> (!<a class="code" href="classCDatabase.html#af421024d0ade14743332069684aba162">variable</a>(v).is_marked()) {</div>
<div class="line"><a name="l00898"></a><span class="lineno"> 898</span>  <a class="code" href="classCDatabase.html#af421024d0ade14743332069684aba162">variable</a>(v).<a class="code" href="classCVariable.html#a605e80794f39e7aa307d94fd13017431">set_marked</a>();</div>
<div class="line"><a name="l00899"></a><span class="lineno"> 899</span>  ++ <a class="code" href="classCSolver.html#a528d66d18534a7d6e73a2e7964103b1c">_num_marked</a>;</div>
<div class="line"><a name="l00900"></a><span class="lineno"> 900</span>  }</div>
<div class="line"><a name="l00901"></a><span class="lineno"> 901</span>  }</div>
<div class="line"><a name="l00902"></a><span class="lineno"> 902</span>  <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00903"></a><span class="lineno"> 903</span>  assert (<a class="code" href="classCDatabase.html#af421024d0ade14743332069684aba162">variable</a>(v).<a class="code" href="classCSolver.html#ad51e4ee566b488f8d3610890f3fa1bb7">dlevel</a>() < dl);</div>
<div class="line"><a name="l00904"></a><span class="lineno"> 904</span>  <span class="keywordflow">if</span> (<a class="code" href="classCDatabase.html#af421024d0ade14743332069684aba162">variable</a>(v).in_new_cl() == -1){ <span class="comment">//it's not in the new cl</span></div>
<div class="line"><a name="l00905"></a><span class="lineno"> 905</span>  <a class="code" href="classCDatabase.html#af421024d0ade14743332069684aba162">variable</a>(v).<a class="code" href="classCVariable.html#a74c853f04808a514d7c99514a7583e2d">set_in_new_cl</a>((*itr).var_sign());</div>
<div class="line"><a name="l00906"></a><span class="lineno"> 906</span>  <a class="code" href="classCSolver.html#ab162797183d22466c24feb117fefc7d6">_conflict_lits</a>.push_back((*itr).s_var());</div>
<div class="line"><a name="l00907"></a><span class="lineno"> 907</span>  }</div>
<div class="line"><a name="l00908"></a><span class="lineno"> 908</span>  }</div>
<div class="line"><a name="l00909"></a><span class="lineno"> 909</span>  }</div>
<div class="line"><a name="l00910"></a><span class="lineno"> 910</span> }</div>
<div class="line"><a name="l00911"></a><span class="lineno"> 911</span> </div>
<div class="line"><a name="l00912"></a><span class="lineno"><a class="code" href="classCSolver.html#a2d476175cdda3b0028fb0efd754630d6"> 912</a></span> <span class="keywordtype">int</span> <a class="code" href="classCSolver.html#a2d476175cdda3b0028fb0efd754630d6">CSolver::analyze_conflicts</a>(<span class="keywordtype">void</span>) {</div>
<div class="line"><a name="l00913"></a><span class="lineno"> 913</span>  <span class="keywordflow">return</span> <a class="code" href="classCSolver.html#a9329cbfb2ba31fe55352644822889242">conflict_analysis_zchaff</a>();</div>
<div class="line"><a name="l00914"></a><span class="lineno"> 914</span> }</div>
<div class="line"><a name="l00915"></a><span class="lineno"> 915</span> </div>
<div class="line"><a name="l00916"></a><span class="lineno"><a class="code" href="classCSolver.html#a9329cbfb2ba31fe55352644822889242"> 916</a></span> <span class="keywordtype">int</span> <a class="code" href="classCSolver.html#a9329cbfb2ba31fe55352644822889242">CSolver::conflict_analysis_zchaff</a> (<span class="keywordtype">void</span>) </div>
<div class="line"><a name="l00917"></a><span class="lineno"> 917</span> {</div>
<div class="line"><a name="l00918"></a><span class="lineno"> 918</span>  assert (<a class="code" href="classCSolver.html#a6bba00c21025040cc46a0499eaea7f01">_conflicts</a>.size());</div>
<div class="line"><a name="l00919"></a><span class="lineno"> 919</span>  assert (<a class="code" href="classCSolver.html#aeab7cd8f6085990a2a1ed518c9d75c6e">_implication_queue</a>.empty());</div>
<div class="line"><a name="l00920"></a><span class="lineno"> 920</span>  assert (<a class="code" href="classCSolver.html#a528d66d18534a7d6e73a2e7964103b1c">_num_marked</a> == 0);</div>
<div class="line"><a name="l00921"></a><span class="lineno"> 921</span>  <span class="keywordtype">int</span> back_level = 0;</div>
<div class="line"><a name="l00922"></a><span class="lineno"> 922</span>  <a class="code" href="xchaff__base_8h.html#a10b9683e115e9c10c0874794507db545">ClauseIdx</a> conflict_cl;</div>
<div class="line"><a name="l00923"></a><span class="lineno"> 923</span>  vector<ClauseIdx> added_conflict_clauses;</div>
<div class="line"><a name="l00924"></a><span class="lineno"> 924</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i=0, sz=<a class="code" href="classCSolver.html#a6bba00c21025040cc46a0499eaea7f01">_conflicts</a>.size(); i<sz; ++i) {</div>
<div class="line"><a name="l00925"></a><span class="lineno"> 925</span>  <a class="code" href="xchaff__base_8h.html#a10b9683e115e9c10c0874794507db545">ClauseIdx</a> cl = <a class="code" href="classCSolver.html#a6bba00c21025040cc46a0499eaea7f01">_conflicts</a>[i];</div>
<div class="line"><a name="l00926"></a><span class="lineno"> 926</span> </div>
<div class="line"><a name="l00927"></a><span class="lineno"> 927</span>  <span class="keywordflow">if</span> (!<a class="code" href="classCDatabase.html#aeb01a55c31dfd135d9f19b561829e88d">is_conflict</a>(cl)) <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l00928"></a><span class="lineno"> 928</span> </div>
<div class="line"><a name="l00929"></a><span class="lineno"> 929</span>  back_level = 0; <span class="comment">// reset it</span></div>
<div class="line"><a name="l00930"></a><span class="lineno"> 930</span>  <span class="keywordflow">while</span> (<a class="code" href="classCSolver.html#ab162797183d22466c24feb117fefc7d6">_conflict_lits</a>.size()) {</div>
<div class="line"><a name="l00931"></a><span class="lineno"> 931</span>  <a class="code" href="classCVariable.html">CVariable</a> & var = <a class="code" href="classCDatabase.html#af421024d0ade14743332069684aba162">variable</a>(<a class="code" href="classCSolver.html#ab162797183d22466c24feb117fefc7d6">_conflict_lits</a>.back() >> 1);</div>
<div class="line"><a name="l00932"></a><span class="lineno"> 932</span>  <a class="code" href="classCSolver.html#ab162797183d22466c24feb117fefc7d6">_conflict_lits</a>.pop_back();</div>
<div class="line"><a name="l00933"></a><span class="lineno"> 933</span>  assert (var.<a class="code" href="classCVariable.html#a106db2a07df4461da1ccfdf17faa8cdf">in_new_cl</a>() != -1);</div>
<div class="line"><a name="l00934"></a><span class="lineno"> 934</span>  var.<a class="code" href="classCVariable.html#a74c853f04808a514d7c99514a7583e2d">set_in_new_cl</a>(-1);</div>
<div class="line"><a name="l00935"></a><span class="lineno"> 935</span>  }</div>
<div class="line"><a name="l00936"></a><span class="lineno"> 936</span>  <span class="keywordtype">int</span> <a class="code" href="classCSolver.html#a881e379b28047fde2157720bf4ee9fd0">max_dlevel</a> = <a class="code" href="classCSolver.html#a15a8ac75d8da0e7e47c0643870b3bcc9">find_max_clause_dlevel</a>(cl); <span class="comment">// find the max level, which is the back track level</span></div>
<div class="line"><a name="l00937"></a><span class="lineno"> 937</span>  <span class="keywordtype">bool</span> first_time = <span class="keyword">true</span>; <span class="comment">//its the beginning</span></div>
<div class="line"><a name="l00938"></a><span class="lineno"> 938</span>  <span class="keywordtype">bool</span> prev_is_uip = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00939"></a><span class="lineno"> 939</span>  <a class="code" href="classCSolver.html#a525a84f821d273c9883a407c585b8b0d">mark_vars_at_level</a> (cl, -1 <span class="comment">/*var*/</span>, max_dlevel);</div>
<div class="line"><a name="l00940"></a><span class="lineno"> 940</span> </div>
<div class="line"><a name="l00941"></a><span class="lineno"> 941</span>  vector <int> & assignments = *<a class="code" href="classCSolver.html#a6a21ab9d2ab20a5c4f103cc1a337e35f">_assignment_stack</a>[<a class="code" href="classCSolver.html#a881e379b28047fde2157720bf4ee9fd0">max_dlevel</a>];</div>
<div class="line"><a name="l00942"></a><span class="lineno"> 942</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = assignments.size() - 1; j >= 0; --j ) { <span class="comment">//now add conflict lits, and unassign vars</span></div>
<div class="line"><a name="l00943"></a><span class="lineno"> 943</span>  <span class="keywordtype">int</span> assigned = assignments[j];</div>
<div class="line"><a name="l00944"></a><span class="lineno"> 944</span>  <span class="keywordflow">if</span> (<a class="code" href="classCDatabase.html#af421024d0ade14743332069684aba162">variable</a>(assigned>>1).<a class="code" href="classCVariable.html#a8be2f24a39402da9c9047c701c0e0486">is_marked</a>()) {</div>
<div class="line"><a name="l00945"></a><span class="lineno"> 945</span>  <a class="code" href="classCDatabase.html#af421024d0ade14743332069684aba162">variable</a>(assigned>>1).<a class="code" href="classCVariable.html#a474d619248f352afcaa3fd4fb6c8788d">clear_marked</a>();</div>
<div class="line"><a name="l00946"></a><span class="lineno"> 946</span>  -- <a class="code" href="classCSolver.html#a528d66d18534a7d6e73a2e7964103b1c">_num_marked</a>; </div>
<div class="line"><a name="l00947"></a><span class="lineno"> 947</span>  <a class="code" href="xchaff__base_8h.html#a10b9683e115e9c10c0874794507db545">ClauseIdx</a> ante_cl = <a class="code" href="classCDatabase.html#af4388cf12d2984898332c519b220d67b">variables</a>()[assigned>>1].get_antecedence();</div>
<div class="line"><a name="l00948"></a><span class="lineno"> 948</span> </div>
<div class="line"><a name="l00949"></a><span class="lineno"> 949</span>  <span class="keywordflow">if</span> ( (<a class="code" href="classCSolver.html#a528d66d18534a7d6e73a2e7964103b1c">_num_marked</a> == 0 && </div>
<div class="line"><a name="l00950"></a><span class="lineno"> 950</span>  (!first_time) && </div>
<div class="line"><a name="l00951"></a><span class="lineno"> 951</span>  (prev_is_uip == <span class="keyword">false</span>))</div>
<div class="line"><a name="l00952"></a><span class="lineno"> 952</span>  || ante_cl==<a class="code" href="xchaff__base_8h.html#abd4c1edc3bf20c1f93ebaca33c9b2b64">NULL_CLAUSE</a>) { <span class="comment">//conclude add clause</span></div>
<div class="line"><a name="l00953"></a><span class="lineno"> 953</span>  assert (<a class="code" href="classCDatabase.html#af421024d0ade14743332069684aba162">variable</a>(assigned>>1).in_new_cl()==-1);</div>
<div class="line"><a name="l00954"></a><span class="lineno"> 954</span>  <a class="code" href="classCSolver.html#ab162797183d22466c24feb117fefc7d6">_conflict_lits</a>.push_back(assigned^0x1); <span class="comment">// add this assignment's reverse, e.g. UIP</span></div>
<div class="line"><a name="l00955"></a><span class="lineno"> 955</span>  <span class="keywordtype">int</span> conflict_cl = <a class="code" href="classCSolver.html#a5f90fcc1b1a7994a94fc8395d95cfb38">add_clause</a>(<a class="code" href="classCSolver.html#ab162797183d22466c24feb117fefc7d6">_conflict_lits</a>, <span class="keyword">false</span>);</div>
<div class="line"><a name="l00956"></a><span class="lineno"> 956</span>  <span class="keywordflow">if</span> (conflict_cl < 0 ) {</div>
<div class="line"><a name="l00957"></a><span class="lineno"> 957</span>  <a class="code" href="classCSolver.html#a5f656ea799ff4b4304b9f4f71a4df315">_stats</a>.<a class="code" href="structCSolverStats.html#ab5c8d00ed96f235136c96197230a09c7">is_mem_out</a> = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00958"></a><span class="lineno"> 958</span>  <a class="code" href="classCSolver.html#a6bba00c21025040cc46a0499eaea7f01">_conflicts</a>.clear();</div>
<div class="line"><a name="l00959"></a><span class="lineno"> 959</span>  assert (<a class="code" href="classCSolver.html#aeab7cd8f6085990a2a1ed518c9d75c6e">_implication_queue</a>.empty());</div>
<div class="line"><a name="l00960"></a><span class="lineno"> 960</span>  <span class="keywordflow">return</span> 1; </div>
<div class="line"><a name="l00961"></a><span class="lineno"> 961</span>  }</div>
<div class="line"><a name="l00962"></a><span class="lineno"> 962</span>  <a class="code" href="classCSolver.html#ab162797183d22466c24feb117fefc7d6">_conflict_lits</a>.pop_back(); <span class="comment">// remove for continue use of _conflict_lits</span></div>
<div class="line"><a name="l00963"></a><span class="lineno"> 963</span>  added_conflict_clauses.push_back(conflict_cl);</div>
<div class="line"><a name="l00964"></a><span class="lineno"> 964</span> </div>
<div class="line"><a name="l00965"></a><span class="lineno"> 965</span>  <a class="code" href="xchaff__utils_8h.html#a763ffd798508592c5092ac77daa5a659">CHECK</a>(cout <<<span class="stringliteral">"Conflict clause: "</span> << cl << <span class="stringliteral">" : "</span> << <a class="code" href="classCDatabase.html#a5af3586dfcd579ab14d37c6b6cf75e18">clause</a>(cl) << <a class="code" href="group__ExprStream__Manip.html#ga05b0ea7353ec24fa8e7e272d7a7875d8" title="Print the end-of-line.">endl</a>;</div>
<div class="line"><a name="l00966"></a><span class="lineno"> 966</span>  cout << <span class="stringliteral">"**Add Clause "</span> <<conflict_cl<< <span class="stringliteral">" : "</span><<<a class="code" href="classCDatabase.html#a5af3586dfcd579ab14d37c6b6cf75e18">clause</a>(conflict_cl) << <a class="code" href="group__ExprStream__Manip.html#ga05b0ea7353ec24fa8e7e272d7a7875d8" title="Print the end-of-line.">endl</a>; </div>
<div class="line"><a name="l00967"></a><span class="lineno"> 967</span>  );</div>
<div class="line"><a name="l00968"></a><span class="lineno"> 968</span> </div>
<div class="line"><a name="l00969"></a><span class="lineno"> 969</span>  prev_is_uip = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00970"></a><span class="lineno"> 970</span>  <span class="keywordflow">break</span>; <span class="comment">//if do this, only one clause will be added.</span></div>
<div class="line"><a name="l00971"></a><span class="lineno"> 971</span>  }</div>
<div class="line"><a name="l00972"></a><span class="lineno"> 972</span>  <span class="keywordflow">else</span> prev_is_uip = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00973"></a><span class="lineno"> 973</span> </div>
<div class="line"><a name="l00974"></a><span class="lineno"> 974</span>  <span class="keywordflow">if</span> ( ante_cl != <a class="code" href="xchaff__base_8h.html#abd4c1edc3bf20c1f93ebaca33c9b2b64">NULL_CLAUSE</a> ) </div>
<div class="line"><a name="l00975"></a><span class="lineno"> 975</span>  <a class="code" href="classCSolver.html#a525a84f821d273c9883a407c585b8b0d">mark_vars_at_level</a>(ante_cl, assigned>>1<span class="comment">/*var*/</span>, max_dlevel);</div>
<div class="line"><a name="l00976"></a><span class="lineno"> 976</span>  <span class="keywordflow">else</span> </div>
<div class="line"><a name="l00977"></a><span class="lineno"> 977</span>  assert (j == 0);</div>
<div class="line"><a name="l00978"></a><span class="lineno"> 978</span>  first_time = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00979"></a><span class="lineno"> 979</span>  }</div>
<div class="line"><a name="l00980"></a><span class="lineno"> 980</span>  }</div>
<div class="line"><a name="l00981"></a><span class="lineno"> 981</span>  back_level = <a class="code" href="classCSolver.html#a881e379b28047fde2157720bf4ee9fd0">max_dlevel</a>;</div>
<div class="line"><a name="l00982"></a><span class="lineno"> 982</span>  <a class="code" href="classCSolver.html#a48ffc1b95c078bcc0bb748f1068479fd">back_track</a>(max_dlevel); </div>
<div class="line"><a name="l00983"></a><span class="lineno"> 983</span>  }</div>
<div class="line"><a name="l00984"></a><span class="lineno"> 984</span>  assert (<a class="code" href="classCSolver.html#a528d66d18534a7d6e73a2e7964103b1c">_num_marked</a> == 0);</div>
<div class="line"><a name="l00985"></a><span class="lineno"> 985</span>  <span class="keywordflow">if</span> (back_level==0) <span class="comment">//there are nothing to be done</span></div>
<div class="line"><a name="l00986"></a><span class="lineno"> 986</span>  <span class="keywordflow">return</span> back_level;</div>
<div class="line"><a name="l00987"></a><span class="lineno"> 987</span> </div>
<div class="line"><a name="l00988"></a><span class="lineno"> 988</span>  <span class="keywordflow">if</span> (<a class="code" href="classCSolver.html#a30e5a80e5be76e6be4398340f3925818">_params</a>.<a class="code" href="structCSolverParameters.html#a3e90abca92fa570f9d1dc5ce49b01daa">back_track_complete</a>) {</div>
<div class="line"><a name="l00989"></a><span class="lineno"> 989</span>  <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> i=0; i< added_conflict_clauses.size(); ++i) {</div>
<div class="line"><a name="l00990"></a><span class="lineno"> 990</span>  <a class="code" href="xchaff__base_8h.html#a10b9683e115e9c10c0874794507db545">ClauseIdx</a> cl = added_conflict_clauses[i];</div>
<div class="line"><a name="l00991"></a><span class="lineno"> 991</span>  <span class="keywordflow">if</span> (<a class="code" href="classCDatabase.html#a3e469952453c4b10f1040e9a19375f77">find_unit_literal</a>(cl)) { <span class="comment">//i.e. if it's a unit clause</span></div>
<div class="line"><a name="l00992"></a><span class="lineno"> 992</span>  <span class="keywordtype">int</span> dl = <a class="code" href="classCSolver.html#a15a8ac75d8da0e7e47c0643870b3bcc9">find_max_clause_dlevel</a>(cl);</div>
<div class="line"><a name="l00993"></a><span class="lineno"> 993</span>  <span class="keywordflow">if</span> (dl < <a class="code" href="classCSolver.html#ad51e4ee566b488f8d3610890f3fa1bb7">dlevel</a>()) { <span class="comment">//thus make sure implied vars are at current dl.</span></div>
<div class="line"><a name="l00994"></a><span class="lineno"> 994</span>  <a class="code" href="classCSolver.html#a48ffc1b95c078bcc0bb748f1068479fd">back_track</a>(dl+1);</div>
<div class="line"><a name="l00995"></a><span class="lineno"> 995</span>  }</div>
<div class="line"><a name="l00996"></a><span class="lineno"> 996</span>  }</div>
<div class="line"><a name="l00997"></a><span class="lineno"> 997</span>  }</div>
<div class="line"><a name="l00998"></a><span class="lineno"> 998</span>  }</div>
<div class="line"><a name="l00999"></a><span class="lineno"> 999</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i=0, sz=added_conflict_clauses.size(); i<sz; ++i) {</div>
<div class="line"><a name="l01000"></a><span class="lineno"> 1000</span>  conflict_cl = added_conflict_clauses[i];</div>
<div class="line"><a name="l01001"></a><span class="lineno"> 1001</span>  <span class="keywordtype">int</span> lit = <a class="code" href="classCDatabase.html#a3e469952453c4b10f1040e9a19375f77">find_unit_literal</a>(conflict_cl);</div>
<div class="line"><a name="l01002"></a><span class="lineno"> 1002</span>  <span class="keywordflow">if</span> (lit) {</div>
<div class="line"><a name="l01003"></a><span class="lineno"> 1003</span>  <a class="code" href="classCSolver.html#a21e170987f92adbe179f39ffe3c861be">queue_implication</a>(lit, conflict_cl);</div>
<div class="line"><a name="l01004"></a><span class="lineno"> 1004</span>  }</div>
<div class="line"><a name="l01005"></a><span class="lineno"> 1005</span>  }</div>
<div class="line"><a name="l01006"></a><span class="lineno"> 1006</span> </div>
<div class="line"><a name="l01007"></a><span class="lineno"> 1007</span>  <a class="code" href="classCSolver.html#a6bba00c21025040cc46a0499eaea7f01">_conflicts</a>.clear();</div>
<div class="line"><a name="l01008"></a><span class="lineno"> 1008</span> </div>
<div class="line"><a name="l01009"></a><span class="lineno"> 1009</span>  <span class="keywordflow">while</span> (<a class="code" href="classCSolver.html#ab162797183d22466c24feb117fefc7d6">_conflict_lits</a>.size()) {</div>
<div class="line"><a name="l01010"></a><span class="lineno"> 1010</span>  <a class="code" href="classCVariable.html">CVariable</a> & var = <a class="code" href="classCDatabase.html#af421024d0ade14743332069684aba162">variable</a>(<a class="code" href="classCSolver.html#ab162797183d22466c24feb117fefc7d6">_conflict_lits</a>.back() >> 1);</div>
<div class="line"><a name="l01011"></a><span class="lineno"> 1011</span>  <a class="code" href="classCSolver.html#ab162797183d22466c24feb117fefc7d6">_conflict_lits</a>.pop_back();</div>
<div class="line"><a name="l01012"></a><span class="lineno"> 1012</span>  assert (var.<a class="code" href="classCVariable.html#a106db2a07df4461da1ccfdf17faa8cdf">in_new_cl</a>() != -1);</div>
<div class="line"><a name="l01013"></a><span class="lineno"> 1013</span>  var.<a class="code" href="classCVariable.html#a74c853f04808a514d7c99514a7583e2d">set_in_new_cl</a>(-1);</div>
<div class="line"><a name="l01014"></a><span class="lineno"> 1014</span>  }</div>
<div class="line"><a name="l01015"></a><span class="lineno"> 1015</span>  <a class="code" href="xchaff__utils_8h.html#a763ffd798508592c5092ac77daa5a659">CHECK</a>( <a class="code" href="classCSolver.html#a60c64d82a19286ac5774adce294aa16a">dump_assignment_stack</a>(););</div>
<div class="line"><a name="l01016"></a><span class="lineno"> 1016</span>  <a class="code" href="xchaff__utils_8h.html#a763ffd798508592c5092ac77daa5a659">CHECK</a>(cout << <span class="stringliteral">"Conflict Analasis: conflict at level: "</span> << back_level;</div>
<div class="line"><a name="l01017"></a><span class="lineno"> 1017</span>  cout << <span class="stringliteral">" Assertion Clause is "</span> << conflict_cl<< <a class="code" href="group__ExprStream__Manip.html#ga05b0ea7353ec24fa8e7e272d7a7875d8" title="Print the end-of-line.">endl</a>; );</div>
<div class="line"><a name="l01018"></a><span class="lineno"> 1018</span>  <span class="keywordflow">return</span> back_level;</div>
<div class="line"><a name="l01019"></a><span class="lineno"> 1019</span> } </div>
<div class="line"><a name="l01020"></a><span class="lineno"> 1020</span> </div>
<div class="line"><a name="l01021"></a><span class="lineno"> 1021</span> </div>
<div class="line"><a name="l01022"></a><span class="lineno"> 1022</span> </div>
<div class="line"><a name="l01023"></a><span class="lineno"> 1023</span> </div>
<div class="line"><a name="l01024"></a><span class="lineno"> 1024</span> </div>
<div class="line"><a name="l01025"></a><span class="lineno"> 1025</span> </div>
<div class="line"><a name="l01026"></a><span class="lineno"> 1026</span> </div>
<div class="line"><a name="l01027"></a><span class="lineno"> 1027</span> </div>
<div class="line"><a name="l01028"></a><span class="lineno"> 1028</span> </div>
<div class="line"><a name="l01029"></a><span class="lineno"> 1029</span> </div>
<div class="line"><a name="l01030"></a><span class="lineno"> 1030</span> </div>
<div class="line"><a name="l01031"></a><span class="lineno"> 1031</span> </div>
<div class="line"><a name="l01032"></a><span class="lineno"> 1032</span> </div>
<div class="line"><a name="l01033"></a><span class="lineno"> 1033</span> </div>
<div class="line"><a name="l01034"></a><span class="lineno"> 1034</span> </div>
<div class="line"><a name="l01035"></a><span class="lineno"> 1035</span> </div>
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