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Update eval_invariant

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This commit is contained in:
Jakob Rath 2023-03-05 07:55:06 +01:00
parent 2285ed90fb
commit 0433f81f78
1 changed files with 13 additions and 10 deletions
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23
src/math/polysat/solver.cpp
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@ -1663,20 +1663,23 @@ namespace polysat {
bool solver::eval_invariant() const {
if (is_conflict())
return true;
bool ok = true;
for (sat::bool_var v = m_bvars.size(); v-- > 0; ) {
sat::literal lit(v);
auto c = lit2cnstr(lit);
if (!all_of(c->vars(), [this](auto w) { return is_assigned(w); }))
sat::literal const lit(v);
signed_constraint const c = lit2cnstr(lit);
if (!all_of(c->vars(), [this](pvar w) { return is_assigned(w); }))
continue;
ok &= (m_bvars.value(lit) != l_true) || !c.is_currently_false(*this);
ok &= (m_bvars.value(lit) != l_false) || !c.is_currently_true(*this);
if (!ok) {
LOG("assignment invariant is broken " << v << "\n" << *this);
break;
lbool const bvalue = m_bvars.value(lit);
lbool const pvalue = c.eval(*this);
if (bvalue != l_undef && pvalue != l_undef && bvalue != pvalue) {
verbose_stream() << "missed bool/eval conflict: " << lit_pp(*this, lit) << "\n";
return false;
}
if (bvalue == l_undef && pvalue != l_undef) {
verbose_stream() << "missed evaluation: " << lit_pp(*this, lit) << "\n";
return false;
}
}
return ok;
return true;
}
/** Check that each variable is either assigned or queued for decisions */