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hardening model checker code against cancellations'

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2016-03-21 15:04:20 -07:00
parent 3dc2028925
commit 701f32471e
3 changed files with 8 additions and 3 deletions
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4
src/smt/smt_model_finder.cpp
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@ -149,6 +149,7 @@ namespace smt {
SASSERT(!contains_model_value(t));
unsigned gen = (*it).m_value;
expr * t_val = ev.eval(t, true);
if (!t_val) break;
TRACE("model_finder", tout << mk_pp(t, m_manager) << " " << mk_pp(t_val, m_manager) << "\n";);
expr * old_t = 0;
@ -828,7 +829,7 @@ namespace smt {
for (; it != end; ++it) {
expr * t = (*it).m_key;
expr * t_val = eval(t, true);
if (!already_found.contains(t_val)) {
if (t_val && !already_found.contains(t_val)) {
values.push_back(t_val);
already_found.insert(t_val);
}
@ -891,6 +892,7 @@ namespace smt {
add_mono_exceptions(n);
ptr_buffer<expr> values;
get_instantiation_set_values(n, values);
if (values.empty()) return;
sort_values(n, values);
sort * s = n->get_sort();
arith_simplifier_plugin * as = get_arith_simp();