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fix gc to not remove ternary clauses that are on assignment trail. This addresses issue with drat proofs that don't pass drat-trim due to deletion during gc, but use in conflicts

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2019-02-22 11:14:20 +01:00
parent 598fc810b5
commit 4c799c144a
11 changed files with 201 additions and 71 deletions
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4
src/sat/sat_drat.h
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@ -45,6 +45,7 @@ namespace sat {
svector<watched_clause> m_watched_clauses;
typedef svector<unsigned> watch;
solver& s;
clause_allocator m_alloc;
std::ostream* m_out;
std::ostream* m_bout;
ptr_vector<clause> m_proof;
@ -61,6 +62,8 @@ namespace sat {
void append(literal l1, literal l2, status st);
void append(clause& c, status st);
bool is_clause(clause& c, literal l1, literal l2, literal l3, status st1, status st2);
friend std::ostream& operator<<(std::ostream & out, status st);
status get_status(bool learned) const;
@ -104,6 +107,7 @@ namespace sat {
bool contains(unsigned n, literal const* c);
bool contains(literal l1, literal l2) { literal lits[2] = {l1, l2}; return contains(2, lits); }
bool contains(literal l1, literal l2, literal l3) { literal lits[3] = {l1, l2, l3}; return contains(3, lits); }
bool contains(literal c, justification const& j);
void check_model(model const& m);
};