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Track set of variables that occur in conflict constraints

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This commit is contained in:
Jakob Rath 2022-10-31 15:18:48 +01:00
parent eba59356f3
commit 6a03df9017
2 changed files with 11 additions and 1 deletions
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src/math/polysat/conflict.h
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@ -107,6 +107,7 @@ namespace polysat {
uint_set m_relevant_vars; // tracked for cone of influence but not directly involved in conflict resolution
unsigned_vector m_var_occurrences; // for each variable, the number of constraints in m_literals that contain it
uint_set m_vars_occurring; // set of variables that occur in at least one of the constraints in m_literals
// Additional lemmas that justify new constraints generated during conflict resolution
clause_ref_vector m_lemmas;
@ -177,6 +178,7 @@ namespace polysat {
bool contains(sat::literal lit) const;
bool contains_pvar(pvar v) const { return m_vars.contains(v) || m_bail_vars.contains(v); }
bool pvar_occurs_in_constraints(pvar v) const { return v < m_var_occurrences.size() && m_var_occurrences[v] > 0; }
uint_set const& vars_occurring_in_constraints() const { return m_vars_occurring; }
#if 0
clause* side_lemma(signed_constraint c) const { SASSERT(c); return side_lemma(c.blit()); }