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be nicer when memout is reached in SMT internalize: return undef rather than crashing

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This commit is contained in:
Nuno Lopes 2022-12-29 11:08:57 +00:00
parent 7cc58c9cc3
commit 47324af210
3 changed files with 33 additions and 12 deletions
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41
src/smt/smt_context.cpp
View file

@ -2961,7 +2961,11 @@ namespace smt {
pop_to_base_lvl();
setup_context(false);
bool was_consistent = !inconsistent();
internalize_assertions(); // internalize assertions before invoking m_asserted_formulas.push_scope
try {
internalize_assertions(); // internalize assertions before invoking m_asserted_formulas.push_scope
} catch (cancel_exception&) {
throw default_exception("Resource limits hit in push");
}
if (!m.inc())
throw default_exception("push canceled");
scoped_suspend_rlimit _suspend_cancel(m.limit());
@ -3556,7 +3560,12 @@ namespace smt {
return p(asms);
}
internalize_assertions();
try {
internalize_assertions();
} catch (cancel_exception&) {
VERIFY(resource_limits_exceeded());
return l_undef;
}
expr_ref_vector theory_assumptions(m);
add_theory_assumptions(theory_assumptions);
if (!theory_assumptions.empty()) {
@ -3620,10 +3629,15 @@ namespace smt {
do {
pop_to_base_lvl();
expr_ref_vector asms(m, num_assumptions, assumptions);
internalize_assertions();
add_theory_assumptions(asms);
TRACE("unsat_core_bug", tout << asms << "\n";);
init_assumptions(asms);
try {
internalize_assertions();
add_theory_assumptions(asms);
TRACE("unsat_core_bug", tout << asms << '\n';);
init_assumptions(asms);
} catch (cancel_exception&) {
VERIFY(resource_limits_exceeded());
return l_undef;
}
TRACE("before_search", display(tout););
r = search();
r = mk_unsat_core(r);
@ -3641,11 +3655,16 @@ namespace smt {
do {
pop_to_base_lvl();
expr_ref_vector asms(cube);
internalize_assertions();
add_theory_assumptions(asms);
// introducing proxies: if (!validate_assumptions(asms)) return l_undef;
for (auto const& clause : clauses) if (!validate_assumptions(clause)) return l_undef;
init_assumptions(asms);
try {
internalize_assertions();
add_theory_assumptions(asms);
// introducing proxies: if (!validate_assumptions(asms)) return l_undef;
for (auto const& clause : clauses) if (!validate_assumptions(clause)) return l_undef;
init_assumptions(asms);
} catch (cancel_exception&) {
VERIFY(resource_limits_exceeded());
return l_undef;
}
for (auto const& clause : clauses) init_clause(clause);
r = search();
r = mk_unsat_core(r);

2
src/smt/smt_context.h
View file

@ -62,6 +62,8 @@ namespace smt {
class model_generator;
struct cancel_exception {};
class context {
friend class model_generator;
friend class lookahead;

2
src/smt/smt_internalizer.cpp
View file

@ -353,7 +353,7 @@ namespace smt {
*/
void context::internalize(expr * n, bool gate_ctx) {
if (memory::above_high_watermark())
throw default_exception("resource limit exceeded during internalization");
throw cancel_exception();
internalize_deep(n);
internalize_rec(n, gate_ctx);
}