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Fix another assertion

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This commit is contained in:
Jakob Rath 2022-11-23 13:46:44 +01:00
parent 4224a14bdc
commit a39cce18cb
2 changed files with 12 additions and 9 deletions
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13
src/math/polysat/solver.cpp
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@ -518,7 +518,6 @@ namespace polysat {
void solver::decide() {
LOG_H2("Decide");
SASSERT(can_decide());
SASSERT(can_pdecide()); // if !can_pdecide(), all boolean literals have been propagated...
if (can_bdecide())
bdecide();
else
@ -533,11 +532,17 @@ namespace polysat {
};
LOG_H2("Decide on non-asserting lemma: " << lemma);
for (sat::literal lit : lemma) {
LOG(lit_pp(*this, lit));
}
sat::literal choice = sat::null_literal;
for (sat::literal lit : lemma) {
switch (m_bvars.value(lit)) {
case l_true:
// Clause is satisfied; nothing to do here
// Happens when all other branches of the lemma have been tried.
// The last branch is entered due to propagation, while the lemma is still on the stack as a decision point.
LOG("Skip decision (clause already satisfied)");
return;
case l_false:
break;
@ -548,10 +553,9 @@ namespace polysat {
}
}
LOG("Choice is " << lit_pp(*this, choice));
// SASSERT(2 <= count_if(lemma, [this](sat::literal lit) { return !m_bvars.is_assigned(lit); });
SASSERT(choice != sat::null_literal);
// TODO: is the case after backtracking correct?
// => the backtracking code has to handle this. making sure that the decision literal is set to false.
SASSERT(2 <= count_if(lemma, [this](sat::literal lit) { return !m_bvars.is_assigned(lit); }));
SASSERT(can_pdecide()); // if !can_pdecide(), all boolean literals have been evaluated
push_level();
assign_decision(choice);
}
@ -950,7 +954,6 @@ namespace polysat {
LOG_H3("Main lemma is not asserting: " << *best_lemma);
for (sat::literal lit : *best_lemma) {
LOG(lit_pp(*this, lit));
// SASSERT(m_bvars.value(lit) != l_true);
}
m_lemmas.push_back(best_lemma);
m_trail.push_back(trail_instr_t::add_lemma_i);