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Issue #354. Fix unsoundness in Array theory based on missing propagation of selects over ite expressions

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2016-01-10 17:11:12 -08:00
parent 0df4931c4b
commit fce286db91
10 changed files with 112 additions and 10 deletions
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39
src/smt/smt_context_inv.cpp
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@ -399,6 +399,45 @@ namespace smt {
#endif
bool context::validate_model() {
if (!m_proto_model) {
return true;
}
ast_manager& m = m_manager;
literal_vector::const_iterator it = m_assigned_literals.begin();
literal_vector::const_iterator end = m_assigned_literals.end();
for (; it != end; ++it) {
literal lit = *it;
if (!is_relevant(lit)) {
continue;
}
expr_ref n(m), res(m);
literal2expr(lit, n);
if (!is_ground(n)) {
continue;
}
switch (get_assignment(*it)) {
case l_undef:
break;
case l_true:
m_proto_model->eval(n, res, false);
CTRACE("mbqi_bug", !m.is_true(res), tout << n << " evaluates to " << res << "\n";);
if (m.is_false(res)) {
return false;
}
break;
case l_false:
m_proto_model->eval(n, res, false);
CTRACE("mbqi_bug", !m.is_false(res), tout << n << " evaluates to " << res << "\n";);
if (m.is_true(res)) {
return false;
}
break;
}
}
return true;
}
/**
\brief validate unsat core returned by
*/