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transfer propagate monomial bounds to nla_solver

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This commit is contained in:
Lev Nachmanson 2023-09-21 11:27:53 -07:00
parent 536930b4a1
commit e31cecf5db
7 changed files with 243 additions and 183 deletions
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22
src/math/lp/nla_core.h
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@ -103,7 +103,10 @@ class core {
emonics m_emons;
svector<lpvar> m_add_buffer;
mutable indexed_uint_set m_active_var_set;
// these maps map a column index to the corresponding index in ibounds
u_map<unsigned> m_improved_lower_bounds;
u_map<unsigned> m_improved_upper_bounds;
const vector<lp::column_type>* m_column_types;
reslimit m_nra_lim;
bool m_use_nra_model = false;
@ -114,12 +117,13 @@ class core {
void check_weighted(unsigned sz, std::pair<unsigned, std::function<void(void)>>* checks);
void add_bounds();
std_vector<lp::implied_bound> & m_implied_bounds;
// try to improve bounds for variables in monomials.
bool improve_bounds();
public:
// constructor
core(lp::lar_solver& s, params_ref const& p, reslimit&);
core(lp::lar_solver& s, params_ref const& p, reslimit&, std_vector<lp::implied_bound> & implied_bounds);
const auto& monics_with_changed_bounds() const { return m_monics_with_changed_bounds; }
void reset_monics_with_changed_bounds() { m_monics_with_changed_bounds.reset(); }
void insert_to_refine(lpvar j);
@ -431,15 +435,23 @@ public:
void set_use_nra_model(bool m);
bool use_nra_model() const { return m_use_nra_model; }
void collect_statistics(::statistics&);
bool is_linear(const svector<lpvar>& m, lpvar& zero_var, lpvar& non_fixed);
void add_bounds_for_zero_var(lpvar monic_var, lpvar zero_var);
void propagate_monic_with_non_fixed(lpvar monic_var, const svector<lpvar>& vars, lpvar non_fixed, const rational& k);
void propagate_monic_with_all_fixed(lpvar monic_var, const svector<lpvar>& vars, const rational& k);
void add_lower_bound_monic(lpvar j, const lp::mpq& v, bool is_strict, std::function<u_dependency*()> explain_dep);
void add_upper_bound_monic(lpvar j, const lp::mpq& v, bool is_strict, std::function<u_dependency*()> explain_dep);
bool upper_bound_is_available(unsigned j) const;
bool lower_bound_is_available(unsigned j) const;
private:
void restore_patched_values();
lp::column_type get_column_type(unsigned j) const { return (*m_column_types)[j]; }
void constrain_nl_in_tableau();
bool solve_tableau();
void restore_tableau();
void save_tableau();
bool integrality_holds();
void calculate_implied_bounds_for_monic(lp::lpvar v);
void init_bound_propagation();
}; // end of core
struct pp_mon {