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#5417 again, refining root clauses above search level

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2021-07-19 16:56:10 -07:00
parent 7af2309fae
commit 49bd3ad159
2 changed files with 9 additions and 2 deletions
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9
src/sat/smt/euf_relevancy.cpp
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@ -38,11 +38,18 @@ namespace euf {
} }
} }
/**
* Add a root clause. Root clauses must all be satisfied by the
* final assignment. If a clause is added above search level it
* is subject to removal on backtracking. These clauses are therefore
* not tracked.
*/
void solver::add_root(unsigned n, sat::literal const* lits) { void solver::add_root(unsigned n, sat::literal const* lits) {
if (!relevancy_enabled()) if (!relevancy_enabled())
return; return;
ensure_dual_solver(); ensure_dual_solver();
m_dual_solver->add_root(n, lits); if (s().at_search_lvl())
m_dual_solver->add_root(n, lits);
} }
void solver::add_aux(unsigned n, sat::literal const* lits) { void solver::add_aux(unsigned n, sat::literal const* lits) {

2
src/sat/smt/q_solver.cpp
View file

@ -62,7 +62,7 @@ namespace q {
if (l.sign() == is_forall(e)) { if (l.sign() == is_forall(e)) {
sat::literal lit = skolemize(q); sat::literal lit = skolemize(q);
add_clause(~l, lit); add_clause(~l, lit);
ctx.add_aux(~l, lit); ctx.add_root(~l, lit);
} }
else { else {
ctx.push_vec(m_universal, l); ctx.push_vec(m_universal, l);