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catch exceptions from cube and backbone calls. They can throw

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2026-06-15 14:02:43 -06:00
parent 2b9b9a9623
commit 48ae786c4c
1 changed files with 29 additions and 17 deletions
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46
src/solver/parallel_tactical2.cpp
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@ -1064,23 +1064,30 @@ class parallel_solver {
expr_ref_vector vars(m);
obj_hashtable<expr> rejected_atoms;
while (true) {
expr_ref_vector cands = s->cube(vars, 10);
bool rejected = false;
for (expr* lit : cands) {
if (!lit)
continue;
if (m.is_true(lit) || m.is_false(lit))
continue;
if (b.path_contains_atom(m_l2g, lease, lit))
continue;
if (m_config.m_global_backbones && b.is_global_backbone_or_negation(m_l2g, lit)) {
expr* atom = lit;
m.is_not(lit, atom);
rejected_atoms.insert(atom);
rejected = true;
continue;
try {
expr_ref_vector cands = s->cube(vars, 10);
for (expr *lit : cands) {
if (!lit)
continue;
if (m.is_true(lit) || m.is_false(lit))
continue;
if (b.path_contains_atom(m_l2g, lease, lit))
continue;
if (m_config.m_global_backbones && b.is_global_backbone_or_negation(m_l2g, lit)) {
expr *atom = lit;
m.is_not(lit, atom);
rejected_atoms.insert(atom);
rejected = true;
continue;
}
return expr_ref(lit, m);
}
return expr_ref(lit, m);
}
catch (...) {
if (!m.inc())
return expr_ref(nullptr, m);
throw;
}
if (!rejected || vars.empty())
@ -1103,8 +1110,13 @@ class parallel_solver {
bb_candidates find_backbone_candidates(expr_ref_vector const& cube, unsigned k = 10) {
bb_candidates result;
vector<solver::scored_literal> cands;
s->get_backbone_candidates(cands, s->get_num_bool_vars());
try {
s->get_backbone_candidates(cands, s->get_num_bool_vars());
} catch (z3_exception &ex) {
if (!m.inc())
return result;
throw;
}
for (auto const& cand : cands) {
expr* lit = cand.lit.get();
if (m_config.m_global_backbones &&