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prune dead states from automata

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2017-08-31 07:33:55 -07:00
parent e8198bbbe3
commit 059bad909a
5 changed files with 70 additions and 22 deletions
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3
src/smt/asserted_formulas.cpp
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@ -645,7 +645,7 @@ void asserted_formulas::propagate_values() {
new_prs2.push_back(pr);
}
}
TRACE("propagate_values", tout << "found: " << found << "\n";);
TRACE("propagate_values", tout << "found: " << found << "\n" << new_exprs2 << "\n";);
// If C is not empty, then reduce R using the updated simplifier cache with entries
// x -> n for each constraint 'x = n' in C.
if (found) {
@ -656,6 +656,7 @@ void asserted_formulas::propagate_values() {
expr_ref new_n(m);
proof_ref new_pr(m);
m_simplifier(n, new_n, new_pr);
TRACE("propagate_values", tout << mk_pp(n, m) << " -> " << new_n << "\n";);
if (n == new_n.get()) {
push_assertion(n, pr, new_exprs1, new_prs1);
}

7
src/smt/smt_quantifier.cpp
View file

@ -492,6 +492,7 @@ namespace smt {
virtual void assign_eh(quantifier * q) {
m_active = true;
ast_manager& m = m_context->get_manager();
if (!m_fparams->m_ematching) {
return;
}
@ -514,7 +515,11 @@ namespace smt {
app * mp = to_app(q->get_pattern(i));
SASSERT(m_context->get_manager().is_pattern(mp));
bool unary = (mp->get_num_args() == 1);
if (!unary && j >= num_eager_multi_patterns) {
if (m.is_rec_fun_def(q) && i > 0) {
// add only the first pattern
TRACE("quantifier", tout << "skip recursive function body " << mk_ismt2_pp(mp, m) << "\n";);
}
else if (!unary && j >= num_eager_multi_patterns) {
TRACE("quantifier", tout << "delaying (too many multipatterns):\n" << mk_ismt2_pp(mp, m_context->get_manager()) << "\n"
<< "j: " << j << " unary: " << unary << " m_params.m_qi_max_eager_multipatterns: " << m_fparams->m_qi_max_eager_multipatterns
<< " num_eager_multi_patterns: " << num_eager_multi_patterns << "\n";);