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fix #4113

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-04-26 17:52:11 -07:00
parent 0499b6b64a
commit c2e0491456
4 changed files with 22 additions and 11 deletions
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11
src/qe/qe_mbp.cpp
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@ -191,6 +191,11 @@ class mbp::impl {
vars.shrink(j);
}
// over-approximation
bool contains_uninterpreted(expr* v) {
return true;
}
bool extract_bools(model_evaluator& eval, expr_ref_vector& fmls, expr* fml) {
TRACE("qe", tout << "extract bools: " << mk_pp(fml, m) << "\n";);
ptr_vector<expr> todo;
@ -209,10 +214,14 @@ class mbp::impl {
m_visited.mark(e);
if (m.is_bool(e) && !m.is_true(e) && !m.is_false(e) && m.inc()) {
expr_ref val = eval(e);
TRACE("qe", tout << "found: " << mk_pp(e, m) << "\n";);
TRACE("qe", tout << "found: " << mk_pp(e, m) << " " << val << "\n";);
if (!m.inc())
continue;
if (!m.is_true(val) && !m.is_false(val) && contains_uninterpreted(val)) {
throw default_exception("could not evaluate Boolean in model");
}
SASSERT(m.is_true(val) || m.is_false(val));
if (!m_bool_visited.is_marked(e)) {
fmls.push_back(m.is_true(val) ? e : mk_not(m, e));
}