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Fix missing boolean propagation after boolean conflict

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Usually in SAT solving, the conflict clause has at least two false literals at the max level (otherwise, the last literal would have been propagated at an earlier level).
But here we are adding clauses on demand; so after backtracking we may have the case that the conflict clause has exactly one undefined literal that must be propagated explicitly.
This commit is contained in:
Jakob Rath 2023-02-01 14:21:02 +01:00
parent 783bd60598
commit 0d56edb65c
7 changed files with 66 additions and 20 deletions
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src/math/polysat/solver.h
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@ -253,6 +253,8 @@ namespace polysat {
void erase_pwatch(pvar v, constraint* c);
void erase_pwatch(constraint* c);
void propagate_clause(clause& cl);
void set_conflict_at_base_level(dependency dep) { m_conflict.init_at_base_level(dep); }
void set_conflict(signed_constraint c) { m_conflict.init(c); }
void set_conflict(clause& cl) { m_conflict.init(cl); }