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some fixes

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This commit is contained in:
Jakob Rath 2021-09-08 15:46:50 +02:00
parent ff1185891a
commit 40d62af796
2 changed files with 20 additions and 10 deletions
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12
src/math/polysat/conflict_core.cpp
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@ -129,7 +129,7 @@ namespace polysat {
// (we still need the list though, for new/temporary constraints.)
int j = 0;
for (auto c : m_constraints)
if (c->bvar() == var)
if (c->bvar() != var)
m_constraints[j++] = c;
m_constraints.shrink(j);
@ -189,7 +189,9 @@ namespace polysat {
}
clause_builder conflict_core::build_core_lemma(unsigned model_level) {
LOG_H3("build lemma from core");
LOG_H3("Build lemma from core");
LOG("core: " << *this);
LOG("model_level: " << model_level);
clause_builder lemma(*m_solver);
// TODO: try a final core reduction step?
@ -197,7 +199,7 @@ namespace polysat {
for (auto c : m_constraints) {
if (!c->has_bvar())
keep(c);
lemma.push(c);
lemma.push(~c);
}
if (m_needs_model) {
@ -210,6 +212,8 @@ namespace polysat {
// Add v != val for each variable
for (pvar v : vars) {
// SASSERT(!m_solver->m_justification[v].is_unassigned()); // TODO: why does this trigger????
if (m_solver->m_justification[v].is_unassigned())
continue;
if (m_solver->m_justification[v].level() > model_level)
continue;
auto diseq = ~cm().eq(lemma.level(), m_solver->var(v) - m_solver->m_value[v]);
@ -225,7 +229,7 @@ namespace polysat {
if (is_bailout())
return build_fallback_lemma(reverted_level);
else
return build_core_lemma(reverted_level - 1);
return build_core_lemma(reverted_level);
}
bool conflict_core::resolve_value(pvar v, vector<signed_constraint> const& cjust_v) {