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fix #6270

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MBQI asserts auxiliary function definitions to handle models of arrays. This is unsound if the definition contains a model value.
This commit is contained in:
Nikolaj Bjorner 2022-08-15 00:13:32 -07:00
parent a0d4a8c21c
commit e0aa32e6c5
1 changed files with 3 additions and 1 deletions
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4
src/smt/smt_model_checker.cpp
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@ -218,7 +218,7 @@ namespace smt {
TRACE("model_checker", tout << "Got some value " << sk_value << "\n";);
if (use_inv) {
unsigned sk_term_gen = 0;
unsigned sk_term_gen = 0;
expr * sk_term = m_model_finder.get_inv(q, i, sk_value, sk_term_gen);
if (sk_term != nullptr) {
TRACE("model_checker", tout << "Found inverse " << mk_pp(sk_term, m) << "\n";);
@ -243,6 +243,8 @@ namespace smt {
func_decl * f = nullptr;
if (autil.is_as_array(sk_value, f) && cex->get_func_interp(f) && cex->get_func_interp(f)->get_interp()) {
expr_ref body(cex->get_func_interp(f)->get_interp(), m);
if (contains_model_value(body))
return false;
ptr_vector<sort> sorts(f->get_arity(), f->get_domain());
svector<symbol> names;
for (unsigned i = 0; i < f->get_arity(); ++i) {