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#5528

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This commit is contained in:
Nikolaj Bjorner 2021-09-01 14:01:15 -07:00
parent a7bc4719c0
commit 7ce4be8455
3 changed files with 25 additions and 2 deletions
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21
src/sat/smt/euf_solver.cpp
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@ -300,7 +300,7 @@ namespace euf {
size_t* c = to_ptr(l);
SASSERT(is_literal(c));
SASSERT(l == get_literal(c));
if (n->value_conflict()) {
if (n->value_conflict()) {
euf::enode* nb = sign ? mk_false() : mk_true();
euf::enode* r = n->get_root();
euf::enode* rb = sign ? mk_true() : mk_false();
@ -458,6 +458,8 @@ namespace euf {
give_up = true;
unsigned num_nodes = m_egraph.num_nodes();
if (merge_shared_bools())
cont = true;
for (auto* e : m_solvers) {
if (!m.inc())
return sat::check_result::CR_GIVEUP;
@ -485,6 +487,23 @@ namespace euf {
return sat::check_result::CR_DONE;
}
bool solver::merge_shared_bools() {
bool merged = false;
for (euf::enode* n : m_egraph.nodes()) {
if (!is_shared(n) || !m.is_bool(n->get_expr()))
continue;
if (n->value() == l_true && !m.is_true(n->get_root()->get_expr())) {
m_egraph.merge(n, mk_true(), to_ptr(sat::literal(n->bool_var())));
merged = true;
}
if (n->value() == l_false && !m.is_false(n->get_root()->get_expr())) {
m_egraph.merge(n, mk_false(), to_ptr(~sat::literal(n->bool_var())));
merged = true;
}
}
return merged;
}
void solver::push() {
si.push();
scope s;