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disable anti-exploration by default

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2017-06-19 23:56:50 -05:00
parent ce592d7716
commit c6fbe38f78
4 changed files with 13 additions and 4 deletions
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2
src/sat/sat_config.cpp
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@ -141,7 +141,7 @@ namespace sat {
else {
throw sat_param_exception("invalid branching heuristic: accepted heuristics are 'vsids', 'lrb' or 'chb'");
}
m_anti_exploration = m_branching_heuristic != BH_VSIDS;
m_anti_exploration = p.branching_anti_exploration();
m_step_size_init = 0.40;
m_step_size_dec = 0.000001;
m_step_size_min = 0.06;

3
src/sat/sat_params.pyg
View file

@ -10,6 +10,7 @@ def_module_params('sat',
('restart.max', UINT, UINT_MAX, 'maximal number of restarts.'),
('restart.factor', DOUBLE, 1.5, 'restart increment factor for geometric strategy'),
('branching.heuristic', SYMBOL, 'vsids', 'branching heuristic vsids, lrb or chb'),
('branching.anti_exploration', BOOL, False, 'apply anti-exploration heuristic for branch selection'),
('random_freq', DOUBLE, 0.01, 'frequency of random case splits'),
('random_seed', UINT, 0, 'random seed'),
('burst_search', UINT, 100, 'number of conflicts before first global simplification'),
@ -22,7 +23,7 @@ def_module_params('sat',
('minimize_lemmas', BOOL, True, 'minimize learned clauses'),
('dyn_sub_res', BOOL, True, 'dynamic subsumption resolution for minimizing learned clauses'),
('core.minimize', BOOL, False, 'minimize computed core'),
('core.minimize_partial', BOOL, False, 'apply partial (cheap) core minimization'), ('threads', UINT, 1, 'number of parallel threads to use'),
('core.minimize_partial', BOOL, False, 'apply partial (cheap) core minimization'), ('threads', UINT, 1, 'number of parallel threads to use'),
('dimacs.core', BOOL, False, 'extract core from DIMACS benchmarks'),
('drat.file', SYMBOL, '', 'file to dump DRAT proofs'),
('drat.check', BOOL, False, 'build up internal proof and check'),

4
src/sat/sat_solver.cpp
View file

@ -1194,9 +1194,9 @@ namespace sat {
return l_true;
if (!resolve_conflict())
return l_false;
if (m_conflicts > m_config.m_max_conflicts)
if (m_conflicts > m_config.m_max_conflicts)
return l_undef;
if (m_conflicts_since_restart > m_restart_threshold)
if (m_conflicts_since_restart > m_restart_threshold)
return l_undef;
if (at_base_lvl()) {
cleanup(); // cleaner may propagate frozen clauses