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fix scc omitting blocked clauses

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2017-10-27 17:29:26 -07:00
parent 2a8a28bb59
commit ba53fc1230
6 changed files with 34 additions and 29 deletions
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4
src/sat/sat_clause.h
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@ -65,8 +65,8 @@ namespace sat {
literal & operator[](unsigned idx) { SASSERT(idx < m_size); return m_lits[idx]; }
literal const & operator[](unsigned idx) const { SASSERT(idx < m_size); return m_lits[idx]; }
bool is_learned() const { return m_learned; }
void unset_learned() { if (id() == 642277) std::cout << "unlearn " << *this << "\n"; SASSERT(is_learned()); m_learned = false; }
void shrink(unsigned num_lits) { SASSERT(num_lits <= m_size); if (num_lits < m_size) { m_size = num_lits; mark_strengthened(); if (id() == 642277) std::cout << "shrink " << *this << "\n"; } }
void unset_learned() { SASSERT(is_learned()); m_learned = false; }
void shrink(unsigned num_lits) { SASSERT(num_lits <= m_size); if (num_lits < m_size) { m_size = num_lits; mark_strengthened(); } }
bool strengthened() const { return m_strengthened; }
void mark_strengthened() { m_strengthened = true; update_approx(); }
void unmark_strengthened() { m_strengthened = false; }

4
src/sat/sat_scc.cpp
View file

@ -107,7 +107,7 @@ namespace sat {
frame & fr = frames.back();
unsigned l_idx = fr.m_lidx;
if (!fr.m_first) {
SASSERT(fr.m_it->is_binary_unblocked_clause());
SASSERT(fr.m_it->is_binary_clause());
// after visiting child
literal l2 = fr.m_it->get_literal();
unsigned l2_idx = l2.index();
@ -118,7 +118,7 @@ namespace sat {
}
fr.m_first = false;
while (fr.m_it != fr.m_end) {
if (!fr.m_it->is_binary_unblocked_clause()) {
if (!fr.m_it->is_binary_clause()) {
fr.m_it++;
continue;
}