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Add level to conflict

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- reset conflict at correct level when popping user scopes
- functions as flag when handling inconsistent input (e.g., opposite literals)
- now all constraints in the conflict core should have bvalue == l_true
This commit is contained in:
Jakob Rath 2022-09-23 15:54:37 +02:00
parent 86d00b536a
commit a4f0e3a228
5 changed files with 87 additions and 28 deletions
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2
src/math/polysat/solver.h
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@ -185,6 +185,7 @@ namespace polysat {
void erase_pwatch(pvar v, constraint* c);
void erase_pwatch(constraint* c);
void set_conflict_at_base_level() { m_conflict.init_at_base_level(); }
void set_conflict(signed_constraint c) { m_conflict.init(c); }
void set_conflict(clause& cl) { m_conflict.init(cl); }
void set_conflict(pvar v, bool by_viable_fallback) { m_conflict.init(v, by_viable_fallback); }
@ -428,6 +429,7 @@ namespace polysat {
solver const& s;
sat::literal lit;
public:
lit_pp(solver const& s, signed_constraint c): s(s), lit(c.blit()) {}
lit_pp(solver const& s, sat::literal lit): s(s), lit(lit) {}
std::ostream& display(std::ostream& out) const;
};