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Fix bug in iuc_solver::get_unsat_core() that prevented clean cores

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This commit is contained in:
Arie Gurfinkel 2018-06-13 15:11:35 -07:00
parent d38879e478
commit 619f681d28
1 changed files with 8 additions and 9 deletions
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17
src/muz/spacer/spacer_iuc_solver.cpp
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@ -215,32 +215,31 @@ void iuc_solver::reset_statistics ()
m_learn_core_sw.reset();
}
void iuc_solver::get_unsat_core (expr_ref_vector &core)
{
void iuc_solver::get_unsat_core (expr_ref_vector &core) {
m_solver.get_unsat_core (core);
ptr_vector<expr> _core(core.size(), core.c_ptr());
undo_proxies_in_core (_core);
undo_proxies_in_core (core);
}
void iuc_solver::undo_proxies_in_core (ptr_vector<expr> &r)
void iuc_solver::undo_proxies_in_core (expr_ref_vector &r)
{
app_ref e(m);
expr_fast_mark1 bg;
for (unsigned i = 0; i < m_first_assumption; ++i) {
bg.mark(m_assumptions.get(i));
for (unsigned i = 0; i < m_first_assumption; ++i) {
bg.mark(m_assumptions.get(i));
}
// expand proxies
unsigned j = 0;
for (expr* rr : r) {
// skip background assumptions
if (bg.is_marked(rr))
if (bg.is_marked(rr))
continue;
// -- undo proxies, but only if they were introduced in check_sat
if (m_is_proxied && is_proxy(rr, e)) {
SASSERT (m.is_or (e));
r[j++] = e->get_arg (1);
}
}
else {
r[j++] = rr;
}