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This commit is contained in:
Jakob Rath 2021-09-13 11:51:19 +02:00
parent f1ce0e233a
commit 0ff87a9943
2 changed files with 1 additions and 6 deletions
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5
src/math/polysat/conflict_core.cpp
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@ -16,11 +16,6 @@ Notes:
TODO: try a final core reduction step or other core minimization
TODO: fallback lemma is redundant:
The core lemma uses m_vars and m_conflict directly instead of walking the stack.
It should be an invariant that the core is false (the negation of the core is valid modulo assertions).
The fallback lemma prunes at least the last value assignment.
TODO: If we have e.g. 4x+y=2 and y=0, then we have a conflict no matter the value of x, so we should drop x=? from the core.
(works currently if x is unassigned; for other cases we would need extra info from constraint::is_currently_false)

2
src/math/polysat/conflict_core.h
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@ -68,7 +68,7 @@ namespace polysat {
pvar conflict_var() const { return m_conflict_var; }
bool is_bailout() const { return m_bailout; }
void set_bailout() { SASSERT(!is_bailout()); m_bailout = true; }
void set_bailout() { SASSERT(!is_bailout()); m_bailout = true; s().m_stats.m_num_bailouts++; }
bool empty() const {
return m_constraints.empty() && m_vars.empty() && m_literals.empty() && m_conflict_var == null_var;