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experiments with LNS

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This commit is contained in:
Nikolaj Bjorner 2021-02-02 13:03:54 -08:00
parent 4ad95939b6
commit 489df0760f
4 changed files with 85 additions and 16 deletions
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9
src/opt/opt_lns.h
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@ -33,24 +33,31 @@ namespace opt {
expr_ref_vector m_soft;
unsigned m_max_conflicts { 1000 };
unsigned m_num_improves { 0 };
bool m_cores_are_valid { true };
bool m_enable_scoped_bounding { false };
vector<expr_ref_vector> m_cores;
expr_mark m_in_core;
expr_mark m_was_flipped;
expr_mark m_is_assumption;
struct scoped_bounding;
std::function<void(model_ref& m)> m_update_model;
std::function<void(vector<expr_ref_vector> const&)> m_relax_cores;
expr* soft(unsigned i) const { return m_soft[i]; }
void set_lns_params();
void save_defaults(params_ref& p);
unsigned improve_step(model_ref& mdl);
lbool improve_step(model_ref& mdl, expr* e);
void relax_cores();
unsigned improve_linear(model_ref& mdl);
unsigned improve_rotate(model_ref& mdl, expr_ref_vector const& asms);
void setup_assumptions(model_ref& mdl, expr_ref_vector const& asms);
public:
lns(solver& s, std::function<void(model_ref&)>& update_model);
void set_relax(std::function<void(vector<expr_ref_vector> const&)>& rc) { m_relax_cores = rc; }
void set_conflicts(unsigned c) { m_max_conflicts = c; }
unsigned climb(model_ref& mdl, expr_ref_vector const& asms);
};