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wip - integrating arithmetic local search

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This commit is contained in:
Nikolaj Bjorner 2023-02-09 15:52:32 -08:00
parent 1b0c76e3f0
commit d22e4aa525
7 changed files with 280 additions and 169 deletions
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60
src/sat/smt/arith_solver.h
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@ -30,6 +30,7 @@ Author:
#include "math/polynomial/algebraic_numbers.h"
#include "math/polynomial/polynomial.h"
#include "sat/smt/sat_th.h"
#include "sat/sat_ddfw.h"
namespace euf {
class solver;
@ -197,6 +198,14 @@ namespace arith {
typedef unsigned var_t;
typedef unsigned atom_t;
struct config {
double cb = 0.0;
unsigned L = 20;
unsigned t = 45;
unsigned max_no_improve = 500000;
double sp = 0.0003;
};
struct stats {
unsigned m_num_flips = 0;
};
@ -237,26 +246,49 @@ namespace arith {
unsigned m_breaks = 0;
};
solver& s;
ast_manager& m;
unsigned m_max_arith_steps = 0;
stats m_stats;
vector<atom_info> m_atoms;
vector<var_info> m_vars;
struct clause {
unsigned m_weight = 1;
rational m_dts = rational::one();
};
solver& s;
ast_manager& m;
sat::ddfw* m_bool_search = nullptr;
unsigned m_max_arith_steps = 0;
unsigned m_best_min_unsat = UINT_MAX;
stats m_stats;
config m_config;
scoped_ptr_vector<atom_info> m_atoms;
vector<var_info> m_vars;
vector<clause> m_clauses;
indexed_uint_set& unsat() { return m_bool_search->unsat_set(); }
unsigned num_clauses() const { return m_bool_search->num_clauses(); }
sat::clause& get_clause(unsigned idx) { return *get_clause_info(idx).m_clause; }
sat::clause const& get_clause(unsigned idx) const { return *get_clause_info(idx).m_clause; }
sat::ddfw::clause_info& get_clause_info(unsigned idx) { return m_bool_search->get_clause_info(idx); }
sat::ddfw::clause_info const& get_clause_info(unsigned idx) const { return m_bool_search->get_clause_info(idx); }
atom_info* atom(sat::literal lit) const { return m_atoms[lit.index()]; }
rational& dts(unsigned idx) { return m_clauses[idx].m_dts; }
bool flip();
void log() {}
bool flip_unsat() { return false; }
bool flip_clauses() { return false; }
bool flip_dscore() { return false; }
// bool flip_dscore(clause const&);
// bool flip(clause const&);
bool flip_unsat();
bool flip_clauses();
bool flip_dscore();
bool flip_dscore(unsigned cl);
bool flip(unsigned cl);
rational dtt(ineq const& ineq) const { return dtt(ineq.m_args_value, ineq); }
rational dtt(rational const& args, ineq const& ineq) const;
rational dtt(ineq const& ineq, var_t v, rational const& new_value) const;
// rational dts(clause const& cl, var_t v, rational const& new_value) const;
// rational dts(clause const& cl) const;
rational dts(unsigned cl, var_t v, rational const& new_value) const;
rational dts(unsigned cl) const;
bool cm(ineq const& ineq, var_t v, rational& new_value);
int cm_score(var_t v, rational const& new_value);
void update(var_t v, rational const& new_value);
void paws();
rational dscore(var_t v, rational const& new_value) const;
void save_best_values() {}
rational value(var_t v) const { return m_vars[v].m_value; }
public:
@ -265,6 +297,7 @@ namespace arith {
void set_bounds_begin();
void set_bounds_end(unsigned num_literals);
void set_bounds(enode* n);
void set(sat::ddfw* d) { m_bool_search = d; }
};
sls m_local_search;
@ -590,6 +623,7 @@ namespace arith {
void set_bounds_end(unsigned num_literals) override { m_local_search.set_bounds_end(num_literals); }
void set_bounds(enode* n) override { m_local_search.set_bounds(n); }
void local_search(bool_vector& phase) override { m_local_search(phase); }
void set_bool_search(sat::ddfw* ddfw) override { m_local_search.set(ddfw); }
// bounds and equality propagation callbacks
lp::lar_solver& lp() { return *m_solver; }