mirrors/z3
3
0
Fork 0
mirror of https://github.com/Z3Prover/z3 synced 2025-10-11 10:18:06 +00:00
Code Activity

record simplified input clauses as lemmas

Browse source 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2019-01-16 16:37:21 -08:00
parent 247980c5a2
commit f2e636c598
7 changed files with 54 additions and 23 deletions
Download patch file Download diff file Expand all files Collapse all files

9
src/sat/sat_solver.cpp
View file

@ -320,11 +320,18 @@ namespace sat {
clause * solver::mk_clause_core(unsigned num_lits, literal * lits, bool learned) {
TRACE("sat", tout << "mk_clause: " << mk_lits_pp(num_lits, lits) << (learned?" learned":" aux") << "\n";);
if (!learned) {
unsigned old_sz = num_lits;
bool keep = simplify_clause(num_lits, lits);
TRACE("sat_mk_clause", tout << "mk_clause (after simp), keep: " << keep << "\n" << mk_lits_pp(num_lits, lits) << "\n";);
if (!keep) {
return nullptr; // clause is equivalent to true.
}
// if an input clause is simplified, then log the simplified version as learned
if (!learned && old_sz > num_lits && m_config.m_drat) {
m_lemma.reset();
m_lemma.append(num_lits, lits);
m_drat.add(m_lemma);
}
++m_stats.m_non_learned_generation;
}
@ -706,7 +713,7 @@ namespace sat {
if (curr != prev) {
prev = curr;
if (i != j)
lits[j] = lits[i];
std::swap(lits[j], lits[i]);
j++;
}
break;