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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(); 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); 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); app_ref e(m);
expr_fast_mark1 bg; expr_fast_mark1 bg;
for (unsigned i = 0; i < m_first_assumption; ++i) { for (unsigned i = 0; i < m_first_assumption; ++i) {
bg.mark(m_assumptions.get(i)); bg.mark(m_assumptions.get(i));
} }
// expand proxies // expand proxies
unsigned j = 0; unsigned j = 0;
for (expr* rr : r) { for (expr* rr : r) {
// skip background assumptions // skip background assumptions
if (bg.is_marked(rr)) if (bg.is_marked(rr))
continue; continue;
// -- undo proxies, but only if they were introduced in check_sat // -- undo proxies, but only if they were introduced in check_sat
if (m_is_proxied && is_proxy(rr, e)) { if (m_is_proxied && is_proxy(rr, e)) {
SASSERT (m.is_or (e)); SASSERT (m.is_or (e));
r[j++] = e->get_arg (1); r[j++] = e->get_arg (1);
} }
else { else {
r[j++] = rr; r[j++] = rr;
} }