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speed-up handling of cnf input to inc_sat_solver

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2019-01-11 20:52:19 -08:00
parent 9bd4050e0c
commit b8d18c6c6d
7 changed files with 133 additions and 57 deletions
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53
src/sat/sat_cleaner.cpp
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@ -78,6 +78,7 @@ namespace sat {
}
void cleaner::cleanup_clauses(clause_vector & cs) {
tmp_clause tmp;
clause_vector::iterator it = cs.begin();
clause_vector::iterator it2 = it;
clause_vector::iterator end = cs.end();
@ -88,12 +89,10 @@ namespace sat {
CTRACE("sat_cleaner_frozen", c.frozen(), tout << c << "\n";);
unsigned sz = c.size();
unsigned i = 0, j = 0;
bool sat = false;
m_cleanup_counter += sz;
for (; i < sz; i++) {
switch (s.value(c[i])) {
case l_true:
sat = true;
goto end_loop;
case l_false:
m_elim_literals++;
@ -108,9 +107,9 @@ namespace sat {
}
end_loop:
CTRACE("sat_cleaner_frozen", c.frozen(),
tout << "sat: " << sat << ", new_size: " << j << "\n";
tout << "sat: " << (i < sz) << ", new_size: " << j << "\n";
tout << mk_lits_pp(j, c.begin()) << "\n";);
if (sat) {
if (i < sz) {
m_elim_clauses++;
s.del_clause(c);
}
@ -119,33 +118,37 @@ namespace sat {
CTRACE("sat_cleaner_bug", new_sz < 2, tout << "new_sz: " << new_sz << "\n";
if (c.size() > 0) tout << "unit: " << c[0] << "\n";
s.display_watches(tout););
if (new_sz == 0) {
switch (new_sz) {
case 0:
s.set_conflict(justification());
s.del_clause(c);
}
else if (new_sz == 1) {
break;
case 1:
s.assign(c[0], justification());
s.del_clause(c);
}
else {
break;
case 2:
SASSERT(s.value(c[0]) == l_undef && s.value(c[1]) == l_undef);
if (new_sz == 2) {
TRACE("cleanup_bug", tout << "clause became binary: " << c[0] << " " << c[1] << "\n";);
s.mk_bin_clause(c[0], c[1], c.is_learned());
s.del_clause(c);
TRACE("cleanup_bug", tout << "clause became binary: " << c[0] << " " << c[1] << "\n";);
s.mk_bin_clause(c[0], c[1], c.is_learned());
s.del_clause(c);
break;
default:
SASSERT(s.value(c[0]) == l_undef && s.value(c[1]) == l_undef);
if (s.m_config.m_drat && new_sz < i) {
tmp.set(c.size(), c.begin(), c.is_learned());
}
else {
c.shrink(new_sz);
*it2 = *it;
it2++;
if (!c.frozen()) {
s.attach_clause(c);
}
if (s.m_config.m_drat) {
// for optimization, could also report deletion
// of previous version of clause.
s.m_drat.add(c, true);
}
c.shrink(new_sz);
*it2 = *it;
it2++;
if (!c.frozen()) {
s.attach_clause(c);
}
if (s.m_config.m_drat && new_sz < i) {
// for optimization, could also report deletion
// of previous version of clause.
s.m_drat.add(c, true);
s.m_drat.del(*tmp.get());
}
}
}