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add tracking for reason unknown

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2017-06-01 17:04:37 -07:00
parent 833a910d57
commit e37a6dd809
4 changed files with 15 additions and 6 deletions
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4
src/sat/sat_solver.h
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@ -132,6 +132,8 @@ namespace sat {
unsigned m_search_lvl;
literal_vector m_trail;
clause_wrapper_vector m_clauses_to_reinit;
std::string m_reason_unknown;
struct scope {
unsigned m_trail_lim;
unsigned m_clauses_to_reinit_lim;
@ -351,6 +353,7 @@ namespace sat {
literal_vector const& get_core() const { return m_core; }
model_converter const & get_model_converter() const { return m_mc; }
void set_model(model const& mdl);
char const* get_reason_unknown() const { return m_reason_unknown.c_str(); }
literal select_lookahead(bool_var_vector const& vars);
@ -374,6 +377,7 @@ namespace sat {
literal_vector m_min_core;
bool m_min_core_valid;
void init_reason_unknown() { m_reason_unknown = "no reason given"; }
void init_assumptions(unsigned num_lits, literal const* lits);
void reassert_min_core();
void update_min_core();