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fix extraction of non-units

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-09-21 21:15:28 -07:00
parent 984e74428a
commit f349d3d013
1 changed files with 16 additions and 3 deletions
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19
src/solver/solver.cpp
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@ -257,6 +257,15 @@ expr_ref_vector solver::get_units(ast_manager& m) {
return result;
}
static bool is_atom(ast_manager& m, expr* f) {
if (!is_app(f)) return true;
app* _f = to_app(f);
family_id bfid = m.get_basic_family_id();
if (_f->get_family_id() != bfid) return true;
if (_f->get_num_args() > 0 && m.is_bool(_f->get_arg(0))) return false;
return m.is_eq(f) || m.is_distinct(f);
}
expr_ref_vector solver::get_non_units(ast_manager& m) {
expr_ref_vector result(m), fmls(m);
get_assertions(fmls);
@ -275,13 +284,17 @@ expr_ref_vector solver::get_non_units(ast_manager& m) {
if (_f->get_family_id() == bfid) {
// basic objects are true/false/and/or/not/=/distinct
// and proof objects (that are not Boolean).
if (_f->get_num_args() > 0 && m.is_bool(_f->get_arg(0))) {
if (i < sz0 && m.is_not(f) && is_atom(m, _f->get_arg(0))) {
marked.mark(_f->get_arg(0));
}
else if (_f->get_num_args() > 0 && m.is_bool(_f->get_arg(0))) {
fmls.append(_f->get_num_args(), _f->get_args());
}
else if (m.is_eq(f) || m.is_distinct(f)) {
if (i >= sz0) result.push_back(f);
else if (i >= sz0 && is_atom(m, f)) {
result.push_back(f);
}
}
else {
if (i >= sz0) result.push_back(f);
}