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Fix/simplify constraint_manager::watch

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This commit is contained in:
Jakob Rath 2023-02-01 14:52:06 +01:00
parent 0d56edb65c
commit fe164c843d
2 changed files with 7 additions and 57 deletions
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24
src/math/polysat/solver.cpp
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@ -1193,30 +1193,20 @@ namespace polysat {
}
}
// Add clause to storage
// Add clause to solver
void solver::add_clause(clause& clause) {
LOG((clause.is_redundant() ? "Lemma: ": "Aux: ") << clause);
for (sat::literal lit : clause) {
LOG(" " << lit_pp(*this, lit));
// TODO: move into constraint_manager::watch
// Try to evaluate literals without boolean value.
// (Normally this should have been done already by using clause_builder::insert_eval/insert_try_eval when constructing the clause.)
if (!m_bvars.is_assigned(lit)) {
switch (lit2cnstr(lit).eval(*this)) {
case l_true:
lbool const status = lit2cnstr(lit).eval(*this);
if (status == l_true)
assign_eval(lit);
break;
case l_false:
else if (status == l_false)
assign_eval(~lit);
break;
default:
break;
}
}
// it could be that such a literal has been created previously but we don't detect it when e.g. narrowing a mul_ovfl_constraint
if (m_bvars.value(lit) == l_true) {
// in this case the clause is useless
LOG(" Clause is already true, skipping...");
return;
}
LOG(" " << lit_pp(*this, lit));
}
SASSERT(!clause.empty());
m_constraints.store(&clause);