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#5336

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This commit is contained in:
Nikolaj Bjorner 2021-06-16 19:12:50 -05:00
parent 3311bd074f
commit df9084ba23
3 changed files with 19 additions and 8 deletions
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8
src/sat/smt/q_mbi.cpp
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@ -146,7 +146,7 @@ namespace q {
return l_undef;
if (m.is_false(qb->mbody))
return l_true;
if (quick_check(q, *qb))
if (quick_check(q, q_flat, *qb))
return l_false;
m_generation_bound = 0;
@ -471,18 +471,20 @@ namespace q {
}
}
bool mbqi::quick_check(quantifier* q, q_body& qb) {
bool mbqi::quick_check(quantifier* q, quantifier* q_flat, q_body& qb) {
unsigned_vector offsets;
if (!first_offset(offsets, qb.vars))
return false;
var_subst subst(m);
expr_ref body(m);
unsigned max_rounds = m_max_quick_check_rounds;
unsigned num_bindings = 0;
expr_ref_vector binding(m);
for (unsigned i = 0; i < max_rounds && num_bindings < m_max_cex; ++i) {
set_binding(offsets, qb.vars, binding);
if (m_model->is_true(qb.vbody)) {
expr_ref body = subst(q->get_expr(), binding);
body = subst(q_flat->get_expr(), binding);
if (is_forall(q))
body = ::mk_not(m, body);
add_instantiation(q, body);

2
src/sat/smt/q_mbi.h
View file

@ -96,7 +96,7 @@ namespace q {
bool check_forall_default(quantifier* q, q_body& qb, model& mdl);
bool check_forall_subst(quantifier* q, q_body& qb, model& mdl);
bool quick_check(quantifier* q, q_body& qb);
bool quick_check(quantifier* q, quantifier* q_flat, q_body& qb);
bool next_offset(unsigned_vector& offsets, app_ref_vector const& vars);
bool first_offset(unsigned_vector& offsets, app_ref_vector const& vars);
bool next_offset(unsigned_vector& offsets, app_ref_vector const& vars, unsigned i, unsigned start);