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user solver (#4709)

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* user solver

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* na

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* na

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* na

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-09-24 04:55:34 -07:00 • committed by GitHub
parent 7c2bdfe3fb
commit 43db7df2b5
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19 changed files with 420 additions and 41 deletions
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16
src/sat/sat_extension.h
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@ -57,11 +57,15 @@ namespace sat {
protected:
bool m_drating { false };
int m_id { 0 };
solver* m_solver { nullptr };
public:
extension(int id): m_id(id) {}
virtual ~extension() {}
virtual int get_id() const { return m_id; }
virtual void set_solver(solver* s) = 0;
int get_id() const { return m_id; }
void set_solver(solver* s) { m_solver = s; }
solver& s() { return *m_solver; }
solver const& s() const { return *m_solver; }
virtual void set_lookahead(lookahead* s) {};
class scoped_drating {
extension& ext;
@ -70,13 +74,13 @@ namespace sat {
~scoped_drating() { ext.m_drating = false; }
};
virtual void init_search() {}
virtual bool propagate(literal l, ext_constraint_idx idx) = 0;
virtual bool unit_propagate() = 0;
virtual bool is_external(bool_var v) = 0;
virtual bool propagate(sat::literal l, sat::ext_constraint_idx idx) { UNREACHABLE(); return false; }
virtual bool unit_propagate() = 0;
virtual bool is_external(bool_var v) { return false; }
virtual double get_reward(literal l, ext_constraint_idx idx, literal_occs_fun& occs) const { return 0; }
virtual void get_antecedents(literal l, ext_justification_idx idx, literal_vector & r, bool probing) = 0;
virtual bool is_extended_binary(ext_justification_idx idx, literal_vector & r) { return false; }
virtual void asserted(literal l) = 0;
virtual void asserted(literal l) {};
virtual check_result check() = 0;
virtual lbool resolve_conflict() { return l_undef; } // stores result in sat::solver::m_lemma
virtual void push() = 0;