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https://github.com/Z3Prover/z3
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expose only necessary methods of lar_solver
Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson
parent
6d8e5400fd
commit
5208b64a6b
16 changed files with 217 additions and 302 deletions
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@ -46,7 +46,8 @@ Revision History:
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namespace lp {
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class int_branch;
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class int_solver;
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class lar_solver : public column_namer {
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struct term_hasher {
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std::size_t operator()(const lar_term &t) const
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@ -72,9 +73,6 @@ class lar_solver : public column_namer {
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return a == b;
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}
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};
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//////////////////// fields //////////////////////////
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lp_settings m_settings;
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@ -82,12 +80,9 @@ class lar_solver : public column_namer {
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stacked_value<simplex_strategy_enum> m_simplex_strategy;
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// such can be found at the initialization step: u < l
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stacked_value<int> m_crossed_bounds_column;
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public:
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lar_core_solver m_mpq_lar_core_solver;
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private:
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int_solver * m_int_solver;
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bool m_need_register_terms;
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public:
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var_register m_var_register;
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var_register m_term_register;
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stacked_vector<ul_pair> m_columns_to_ul_pairs;
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@ -108,100 +103,43 @@ public:
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vector<impq> m_backup_x;
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// end of fields
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const vector<lar_term*> & terms() const { return m_terms; }
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lar_term const& term(unsigned i) const { return *m_terms[i]; }
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constraint_set const& constraints() const { return m_constraints; }
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void set_int_solver(int_solver * int_slv) { m_int_solver = int_slv; }
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int_solver * get_int_solver() { return m_int_solver; }
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////////////////// methods ////////////////////////////////
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static_matrix<mpq, numeric_pair<mpq>> & A_r();
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static_matrix<mpq, numeric_pair<mpq>> const & A_r() const;
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static_matrix<double, double> & A_d();
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static_matrix<double, double > const & A_d() const;
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static bool valid_index(unsigned j) { return static_cast<int>(j) >= 0;}
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bool column_is_int(unsigned j) const;
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bool column_value_is_int(unsigned j) const { return m_mpq_lar_core_solver.m_r_x[j].is_int(); }
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const impq& get_column_value(unsigned j) const { return m_mpq_lar_core_solver.m_r_x[j]; }
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void set_column_value(unsigned j, const impq& v) {
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m_mpq_lar_core_solver.m_r_x[j] = v;
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inline void set_column_value(unsigned j, const impq& v) {
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m_mpq_lar_core_solver.m_r_solver.update_x(j, v);
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}
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unsigned external_to_column_index(unsigned) const;
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// NSB code review: function seems misnamed. 'j' can be a term index. Columns are not term indices.
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const mpq& get_column_value_rational(unsigned j) const {
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if (tv::is_term(j)) {
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j = m_var_register.external_to_local(j);
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}
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return m_mpq_lar_core_solver.m_r_x[j].x;
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}
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bool column_is_fixed(unsigned j) const;
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bool column_is_free(unsigned j) const;
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const lar_term & get_term(unsigned j) const;
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bool row_has_a_big_num(unsigned i) const;
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public:
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// init region
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bool strategy_is_undecided() const;
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var_index add_var(unsigned ext_j, bool is_integer);
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var_index add_named_var(unsigned ext_j, bool is_integer, const std::string&);
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void register_new_ext_var_index(unsigned ext_v, bool is_int);
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bool external_is_used(unsigned) const;
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bool term_is_int(const lar_term * t) const;
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bool term_is_int(const vector<std::pair<mpq, unsigned int>> & coeffs) const;
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bool var_is_int(var_index v) const;
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void add_non_basic_var_to_core_fields(unsigned ext_j, bool is_int);
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void add_new_var_to_core_fields_for_doubles(bool register_in_basis);
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void add_new_var_to_core_fields_for_mpq(bool register_in_basis);
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mpq adjust_bound_for_int(lpvar j, lconstraint_kind&, const mpq&);
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// terms
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bool all_vars_are_registered(const vector<std::pair<mpq, var_index>> & coeffs);
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var_index add_term(const vector<std::pair<mpq, var_index>> & coeffs, unsigned ext_i);
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var_index add_term_undecided(const vector<std::pair<mpq, var_index>> & coeffs);
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bool term_coeffs_are_ok(const vector<std::pair<mpq, var_index>> & coeffs);
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void push_term(lar_term* t);
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void add_row_for_term(const lar_term * term, unsigned term_ext_index);
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void add_row_from_term_no_constraint(const lar_term * term, unsigned term_ext_index);
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void add_basic_var_to_core_fields();
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constraint_index mk_var_bound(var_index j, lconstraint_kind kind, const mpq & right_side);
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void activate(constraint_index ci);
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constraint_index add_var_bound(var_index j, lconstraint_kind kind, const mpq & right_side) ;
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bool compare_values(var_index j, lconstraint_kind kind, const mpq & right_side);
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bool compare_values(impq const& lhs, lconstraint_kind k, const mpq & rhs);
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// columns
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bool column_is_int(column_index const& j) const { return column_is_int((unsigned)j); }
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column_index to_column_index(unsigned v) const { return column_index(external_to_column_index(v)); }
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bool is_fixed(column_index const& j) const { return column_is_fixed(j); }
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const impq& get_value(column_index const& j) const { return get_column_value(j); }
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@ -214,15 +152,12 @@ public:
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void update_bound_with_no_ub_no_lb(var_index j, lconstraint_kind kind, const mpq & right_side, constraint_index constr_index);
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constraint_index add_var_bound_on_constraint_for_term(var_index j, lconstraint_kind kind, const mpq & right_side);
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void set_infeasible_column(unsigned j) {
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inline void set_infeasible_column(unsigned j) {
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set_status(lp_status::INFEASIBLE);
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m_crossed_bounds_column = j;
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}
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constraint_index add_constraint_from_term_and_create_new_column_row(unsigned term_j, const lar_term* term,
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lconstraint_kind kind, const mpq & right_side);
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unsigned row_of_basic_column(unsigned) const;
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void decide_on_strategy_and_adjust_initial_state();
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@ -235,22 +170,9 @@ public:
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// this fills the last row of A_d and sets the basis column: -1 in the last column of the row
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void fill_last_row_of_A_d(static_matrix<double, double> & A, const lar_term* ls);
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//end of init region
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lp_settings & settings();
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lp_settings const & settings() const;
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void clear();
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lar_solver();
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void set_track_pivoted_rows(bool v);
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bool get_track_pivoted_rows() const;
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virtual ~lar_solver();
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bool use_lu() const;
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@ -270,81 +192,21 @@ public:
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void substitute_basis_var_in_terms_for_row(unsigned i);
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void calculate_implied_bounds_for_row(unsigned i, lp_bound_propagator & bp);
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unsigned adjust_column_index_to_term_index(unsigned j) const;
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unsigned map_term_index_to_column_index(unsigned j) const;
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var_index local_to_external(var_index idx) const { return tv::is_term(idx)?
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m_term_register.local_to_external(idx) : m_var_register.local_to_external(idx); }
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unsigned number_of_vars() const { return m_var_register.size(); }
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var_index external_to_local(unsigned j) const {
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var_index local_j;
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if (m_var_register.external_is_used(j, local_j) ||
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m_term_register.external_is_used(j, local_j)) {
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return local_j;
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}
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else {
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return -1;
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}
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}
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bool column_has_upper_bound(unsigned j) const {
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return m_mpq_lar_core_solver.m_r_solver.column_has_upper_bound(j);
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}
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bool column_has_lower_bound(unsigned j) const {
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return m_mpq_lar_core_solver.m_r_solver.column_has_lower_bound(j);
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}
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const impq& get_upper_bound(column_index j) const {
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return m_mpq_lar_core_solver.m_r_solver.m_upper_bounds[j];
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}
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const impq& get_lower_bound(column_index j) const {
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return m_mpq_lar_core_solver.m_r_solver.m_lower_bounds[j];
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}
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void propagate_bounds_on_a_term(const lar_term& t, lp_bound_propagator & bp, unsigned term_offset);
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void explain_implied_bound(implied_bound & ib, lp_bound_propagator & bp);
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bool term_is_used_as_row(unsigned term) const;
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void propagate_bounds_on_terms(lp_bound_propagator & bp);
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// goes over touched rows and tries to induce bounds
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void propagate_bounds_for_touched_rows(lp_bound_propagator & bp);
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lp_status get_status() const;
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void set_status(lp_status s);
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lp_status find_feasible_solution();
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lp_status solve();
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void fill_explanation_from_crossed_bounds_column(explanation & evidence) const;
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unsigned get_total_iterations() const;
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// see http://research.microsoft.com/projects/z3/smt07.pdf
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// This method searches for a feasible solution with as many different values of variables, reverenced in vars, as it can find
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// Attention, after a call to this method the non-basic variables don't necesserarly stick to their bounds anymore
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vector<unsigned> get_list_of_all_var_indices() const;
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void push();
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static void clean_popped_elements(unsigned n, u_set& set);
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static void shrink_inf_set_after_pop(unsigned n, u_set & set);
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void pop(unsigned k);
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bool maximize_term_on_tableau(const lar_term & term,
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impq &term_max);
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@ -358,13 +220,8 @@ public:
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bool maximize_term_on_corrected_r_solver(lar_term & term, impq &term_max);
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// starting from a given feasible state look for the maximum of the term
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// return true if found and false if unbounded
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lp_status maximize_term(unsigned j_or_term, impq &term_max);
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const lar_term & get_term(tv const& t) const { lp_assert(t.is_term()); return *m_terms[t.id()]; }
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// return true if found and false if unbounded
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void pop_core_solver_params();
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void pop_core_solver_params(unsigned k);
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@ -391,10 +248,6 @@ public:
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void adjust_x_of_column(unsigned j);
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bool row_is_correct(unsigned i) const;
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bool ax_is_correct() const;
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bool tableau_with_costs() const;
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bool costs_are_used() const;
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@ -409,13 +262,7 @@ public:
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void detect_rows_with_changed_bounds_for_column(unsigned j);
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void detect_rows_with_changed_bounds();
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inline bool is_base(unsigned j) const {
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return m_mpq_lar_core_solver.m_r_heading[j] >= 0;
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}
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bool move_non_basic_columns_to_bounds();
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bool move_non_basic_column_to_bounds(unsigned j);
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void set_value_for_nbasic_column(unsigned j, const impq & new_val);
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void update_x_and_inf_costs_for_columns_with_changed_bounds();
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@ -430,7 +277,6 @@ public:
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bool x_is_correct() const;
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bool var_is_registered(var_index vj) const;
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void fill_last_row_of_A_r(static_matrix<mpq, numeric_pair<mpq>> & A, const lar_term * ls);
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@ -443,8 +289,6 @@ public:
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bool try_to_set_fixed(column_info<mpq> & ci);
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column_type get_column_type(unsigned j) const;
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bool all_constrained_variables_are_registered(const vector<std::pair<mpq, var_index>>& left_side);
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bool all_constraints_hold() const;
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@ -465,50 +309,19 @@ public:
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mpq sum_of_right_sides_of_explanation(explanation &) const;
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bool has_lower_bound(var_index var, constraint_index& ci, mpq& value, bool& is_strict) const;
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bool has_upper_bound(var_index var, constraint_index& ci, mpq& value, bool& is_strict) const;
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bool has_value(var_index var, mpq& value) const;
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void get_infeasibility_explanation(explanation &) const;
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void get_infeasibility_explanation_for_inf_sign(
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explanation & exp,
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const vector<std::pair<mpq, unsigned>> & inf_row,
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int inf_sign) const;
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void get_model(std::unordered_map<var_index, mpq> & variable_values) const;
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void get_rid_of_inf_eps();
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void get_model_do_not_care_about_diff_vars(std::unordered_map<var_index, mpq> & variable_values) const;
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std::string get_variable_name(var_index vi) const;
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void set_variable_name(var_index vi, std::string);
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// ********** print region start
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std::ostream& print_terms(std::ostream& out) const;
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std::ostream& print_term(lar_term const& term, std::ostream & out) const;
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static std::ostream& print_term_as_indices(lar_term const& term, std::ostream & out);
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std::ostream& print_constraint_indices_only(const lar_base_constraint * c, std::ostream & out) const;
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std::ostream& print_implied_bound(const implied_bound& be, std::ostream & out) const;
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std::ostream& print_values(std::ostream& out) const;
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mpq get_left_side_val(const lar_base_constraint & cns, const std::unordered_map<var_index, mpq> & var_map) const;
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void fill_var_set_for_random_update(unsigned sz, var_index const * vars, vector<unsigned>& column_list);
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void random_update(unsigned sz, var_index const * vars);
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void pivot_fixed_vars_from_basis();
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void pop();
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bool column_represents_row_in_tableau(unsigned j);
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void make_sure_that_the_bottom_right_elem_not_zero_in_tableau(unsigned i, unsigned j);
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void remove_last_row_and_column_from_tableau(unsigned j);
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@ -526,48 +339,74 @@ public:
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return get_column_value(j).is_int();
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}
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bool column_is_real(unsigned j) const {
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return !column_is_int(j);
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}
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bool model_is_int_feasible() const;
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const impq & column_lower_bound(unsigned j) const {
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return m_mpq_lar_core_solver.lower_bound(j);
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}
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const impq & column_upper_bound(unsigned j) const {
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return m_mpq_lar_core_solver.upper_bound(j);
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}
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bool column_is_bounded(unsigned j) const {
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return m_mpq_lar_core_solver.column_is_bounded(j);
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}
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std::pair<constraint_index, constraint_index> add_equality(lpvar j, lpvar k);
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void get_bound_constraint_witnesses_for_column(unsigned j, constraint_index & lc, constraint_index & uc) const {
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const ul_pair & ul = m_columns_to_ul_pairs[j];
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lc = ul.lower_bound_witness();
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uc = ul.upper_bound_witness();
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}
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indexed_vector<mpq> & get_column_in_lu_mode(unsigned j) {
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m_column_buffer.clear();
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m_column_buffer.resize(A_r().row_count());
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m_mpq_lar_core_solver.m_r_solver.solve_Bd(j, m_column_buffer);
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return m_column_buffer;
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}
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bool bound_is_integer_for_integer_column(unsigned j, const mpq & right_side) const;
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const row_strip<mpq> & get_row(unsigned i) {
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return A_r().m_rows[i];
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}
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unsigned get_base_column_in_row(unsigned row_index) const {
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return m_mpq_lar_core_solver.m_r_solver.get_base_column_in_row(row_index);
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}
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lar_core_solver & get_core_solver() { return m_mpq_lar_core_solver; }
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void catch_up_in_updating_int_solver();
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var_index to_column(unsigned ext_j) const;
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void fix_terms_with_rounded_columns();
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void update_delta_for_terms(const impq & delta, unsigned j, const vector<unsigned>&);
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void fill_vars_to_terms(vector<vector<unsigned>> & vars_to_terms);
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bool remove_from_basis(unsigned);
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lar_term get_term_to_maximize(unsigned ext_j) const;
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bool sum_first_coords(const lar_term& t, mpq & val) const;
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void collect_rounded_rows_to_fix();
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void register_normalized_term(const lar_term&, lpvar);
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void deregister_normalized_term(const lar_term&);
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bool inside_bounds(lpvar, const impq&) const;
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public:
|
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lp_status maximize_term(unsigned j_or_term, impq &term_max);
|
||||
inline
|
||||
core_solver_pretty_printer<lp::mpq, lp::impq> pp(std::ostream& out) { return
|
||||
core_solver_pretty_printer<lp::mpq, lp::impq>(m_mpq_lar_core_solver.m_r_solver, out); }
|
||||
void get_infeasibility_explanation(explanation &) const;
|
||||
inline void backup_x() { m_backup_x = m_mpq_lar_core_solver.m_r_x; }
|
||||
inline void restore_x() { m_mpq_lar_core_solver.m_r_x = m_backup_x; }
|
||||
void explain_implied_bound(implied_bound & ib, lp_bound_propagator & bp);
|
||||
constraint_index mk_var_bound(var_index j, lconstraint_kind kind, const mpq & right_side);
|
||||
void activate(constraint_index ci);
|
||||
void random_update(unsigned sz, var_index const * vars);
|
||||
void propagate_bounds_on_terms(lp_bound_propagator & bp);
|
||||
void propagate_bounds_for_touched_rows(lp_bound_propagator & bp);
|
||||
bool is_fixed(column_index const& j) const { return column_is_fixed(j); }
|
||||
inline column_index to_column_index(unsigned v) const { return column_index(external_to_column_index(v)); }
|
||||
bool external_is_used(unsigned) const;
|
||||
void pop(unsigned k);
|
||||
bool compare_values(var_index j, lconstraint_kind kind, const mpq & right_side);
|
||||
var_index add_term(const vector<std::pair<mpq, var_index>> & coeffs, unsigned ext_i);
|
||||
void register_existing_terms();
|
||||
constraint_index add_var_bound(var_index j, lconstraint_kind kind, const mpq & right_side) ;
|
||||
var_index add_var(unsigned ext_j, bool is_integer);
|
||||
void set_cut_strategy(unsigned cut_frequency);
|
||||
inline unsigned column_count() const { return A_r().column_count(); }
|
||||
inline var_index local_to_external(var_index idx) const {
|
||||
return tv::is_term(idx)?
|
||||
m_term_register.local_to_external(idx) : m_var_register.local_to_external(idx);
|
||||
}
|
||||
bool column_corresponds_to_term(unsigned) const;
|
||||
inline unsigned row_count() const { return A_r().row_count(); }
|
||||
bool var_is_registered(var_index vj) const;
|
||||
bool try_to_patch(lpvar, const mpq&, const std::function<bool (lpvar)>& blocker,const std::function<void (lpvar)>& change_report);
|
||||
inline bool column_has_upper_bound(unsigned j) const {
|
||||
return m_mpq_lar_core_solver.m_r_solver.column_has_upper_bound(j);
|
||||
}
|
||||
|
||||
inline bool column_has_lower_bound(unsigned j) const {
|
||||
return m_mpq_lar_core_solver.m_r_solver.column_has_lower_bound(j);
|
||||
}
|
||||
|
||||
inline
|
||||
constraint_index get_column_upper_bound_witness(unsigned j) const {
|
||||
if (tv::is_term(j)) {
|
||||
j = m_var_register.external_to_local(j);
|
||||
|
|
@ -575,18 +414,75 @@ public:
|
|||
return m_columns_to_ul_pairs()[j].upper_bound_witness();
|
||||
}
|
||||
|
||||
constraint_index get_column_lower_bound_witness(unsigned j) const {
|
||||
inline
|
||||
const impq& get_upper_bound(column_index j) const {
|
||||
return m_mpq_lar_core_solver.m_r_solver.m_upper_bounds[j];
|
||||
}
|
||||
|
||||
inline
|
||||
const impq& get_lower_bound(column_index j) const {
|
||||
return m_mpq_lar_core_solver.m_r_solver.m_lower_bounds[j];
|
||||
}
|
||||
bool has_lower_bound(var_index var, constraint_index& ci, mpq& value, bool& is_strict) const;
|
||||
bool has_upper_bound(var_index var, constraint_index& ci, mpq& value, bool& is_strict) const;
|
||||
bool has_value(var_index var, mpq& value) const;
|
||||
bool fetch_normalized_term_column(const lar_term& t, std::pair<mpq, lpvar>& ) const;
|
||||
unsigned map_term_index_to_column_index(unsigned j) const;
|
||||
bool column_is_fixed(unsigned j) const;
|
||||
bool column_is_free(unsigned j) const;
|
||||
unsigned adjust_column_index_to_term_index(unsigned j) const;
|
||||
lp_settings & settings();
|
||||
lp_settings const & settings() const;
|
||||
column_type get_column_type(unsigned j) const { return m_mpq_lar_core_solver.m_column_types()[j]; }
|
||||
const impq & get_lower_bound(unsigned j) const { return m_mpq_lar_core_solver.m_r_lower_bounds()[j]; }
|
||||
const impq & get_upper_bound(unsigned j) const { return m_mpq_lar_core_solver.m_r_upper_bounds()[j]; }
|
||||
std::ostream& print_terms(std::ostream& out) const;
|
||||
std::ostream& print_term(lar_term const& term, std::ostream & out) const;
|
||||
static std::ostream& print_term_as_indices(lar_term const& term, std::ostream & out);
|
||||
std::ostream& print_constraint_indices_only(const lar_base_constraint * c, std::ostream & out) const;
|
||||
std::ostream& print_implied_bound(const implied_bound& be, std::ostream & out) const;
|
||||
std::ostream& print_values(std::ostream& out) const;
|
||||
void get_model(std::unordered_map<var_index, mpq> & variable_values) const;
|
||||
void get_rid_of_inf_eps();
|
||||
void get_model_do_not_care_about_diff_vars(std::unordered_map<var_index, mpq> & variable_values) const;
|
||||
std::string get_variable_name(var_index vi) const;
|
||||
void set_variable_name(var_index vi, std::string);
|
||||
unsigned number_of_vars() const { return m_var_register.size(); }
|
||||
inline bool is_base(unsigned j) const { return m_mpq_lar_core_solver.m_r_heading[j] >= 0; }
|
||||
inline const impq & column_lower_bound(unsigned j) const {
|
||||
return m_mpq_lar_core_solver.lower_bound(j);
|
||||
}
|
||||
|
||||
inline const impq & column_upper_bound(unsigned j) const {
|
||||
return m_mpq_lar_core_solver.upper_bound(j);
|
||||
}
|
||||
|
||||
inline bool column_is_bounded(unsigned j) const {
|
||||
return m_mpq_lar_core_solver.column_is_bounded(j);
|
||||
}
|
||||
|
||||
std::pair<constraint_index, constraint_index> add_equality(lpvar j, lpvar k);
|
||||
|
||||
inline void get_bound_constraint_witnesses_for_column(unsigned j, constraint_index & lc, constraint_index & uc) const {
|
||||
const ul_pair & ul = m_columns_to_ul_pairs[j];
|
||||
lc = ul.lower_bound_witness();
|
||||
uc = ul.upper_bound_witness();
|
||||
}
|
||||
inline constraint_set const& constraints() const { return m_constraints; }
|
||||
void push();
|
||||
void pop();
|
||||
inline constraint_index get_column_lower_bound_witness(unsigned j) const {
|
||||
if (tv::is_term(j)) {
|
||||
j = m_var_register.external_to_local(j);
|
||||
}
|
||||
return m_columns_to_ul_pairs()[j].lower_bound_witness();
|
||||
}
|
||||
|
||||
tv column2tv(column_index const& c) const {
|
||||
inline tv column2tv(column_index const& c) const {
|
||||
return tv::raw(adjust_column_index_to_term_index(c));
|
||||
}
|
||||
|
||||
std::ostream& print_column_info(unsigned j, std::ostream& out) const {
|
||||
inline std::ostream& print_column_info(unsigned j, std::ostream& out) const {
|
||||
m_mpq_lar_core_solver.m_r_solver.print_column_info(j, out);
|
||||
if (tv::is_term(j)) {
|
||||
print_term_as_indices(get_term(j), out) << "\n";
|
||||
|
|
@ -597,51 +493,75 @@ public:
|
|||
}
|
||||
return out;
|
||||
}
|
||||
|
||||
|
||||
inline std::ostream& print_column_bound_info(unsigned j, std::ostream& out) const {
|
||||
return m_mpq_lar_core_solver.m_r_solver.print_column_bound_info(j, out);
|
||||
}
|
||||
|
||||
bool has_int_var() const;
|
||||
|
||||
bool has_inf_int() const {
|
||||
inline bool has_inf_int() const {
|
||||
for (unsigned j = 0; j < column_count(); j++) {
|
||||
if (column_is_int(j) && ! column_value_is_int(j))
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
bool r_basis_has_inf_int() const {
|
||||
inline const vector<lar_term*> & terms() const { return m_terms; }
|
||||
inline lar_term const& term(unsigned i) const { return *m_terms[i]; }
|
||||
inline void set_int_solver(int_solver * int_slv) { m_int_solver = int_slv; }
|
||||
inline int_solver * get_int_solver() { return m_int_solver; }
|
||||
const lar_term & get_term(tv const& t) const { lp_assert(t.is_term()); return *m_terms[t.id()]; }
|
||||
lp_status find_feasible_solution();
|
||||
bool move_non_basic_columns_to_bounds();
|
||||
bool move_non_basic_column_to_bounds(unsigned j);
|
||||
inline bool r_basis_has_inf_int() const {
|
||||
for (unsigned j : r_basis()) {
|
||||
if (column_is_int(j) && ! column_value_is_int(j))
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
lar_core_solver & get_core_solver() { return m_mpq_lar_core_solver; }
|
||||
bool column_corresponds_to_term(unsigned) const;
|
||||
void catch_up_in_updating_int_solver();
|
||||
var_index to_column(unsigned ext_j) const;
|
||||
bool tighten_term_bounds_by_delta(tv const& t, const impq&);
|
||||
void round_to_integer_solution();
|
||||
void fix_terms_with_rounded_columns();
|
||||
void update_delta_for_terms(const impq & delta, unsigned j, const vector<unsigned>&);
|
||||
void fill_vars_to_terms(vector<vector<unsigned>> & vars_to_terms);
|
||||
unsigned column_count() const { return A_r().column_count(); }
|
||||
unsigned row_count() const { return A_r().row_count(); }
|
||||
inline const row_strip<mpq> & get_row(unsigned i) { return A_r().m_rows[i]; }
|
||||
bool row_is_correct(unsigned i) const;
|
||||
bool ax_is_correct() const;
|
||||
bool get_equality_and_right_side_for_term_on_current_x(tv const& t, mpq &rs, constraint_index& ci, bool &upper_bound) const;
|
||||
bool var_is_int(var_index v) const;
|
||||
const vector<int> & r_heading() const { return m_mpq_lar_core_solver.m_r_heading; }
|
||||
const vector<unsigned> & r_basis() const { return m_mpq_lar_core_solver.r_basis(); }
|
||||
const vector<unsigned> & r_nbasis() const { return m_mpq_lar_core_solver.r_nbasis(); }
|
||||
bool get_equality_and_right_side_for_term_on_current_x(tv const& t, mpq &rs, constraint_index& ci, bool &upper_bound) const;
|
||||
bool remove_from_basis(unsigned);
|
||||
lar_term get_term_to_maximize(unsigned ext_j) const;
|
||||
void set_cut_strategy(unsigned cut_frequency);
|
||||
bool sum_first_coords(const lar_term& t, mpq & val) const;
|
||||
void collect_rounded_rows_to_fix();
|
||||
void register_existing_terms();
|
||||
void register_normalized_term(const lar_term&, lpvar);
|
||||
void deregister_normalized_term(const lar_term&);
|
||||
bool fetch_normalized_term_column(const lar_term& t, std::pair<mpq, lpvar>& ) const;
|
||||
bool try_to_patch(lpvar, const mpq&, const std::function<bool (lpvar)>& blocker,const std::function<void (lpvar)>& change_report);
|
||||
bool inside_bounds(lpvar, const impq&) const;
|
||||
void backup_x() { m_backup_x = m_mpq_lar_core_solver.m_r_x; }
|
||||
void restore_x() { m_mpq_lar_core_solver.m_r_x = m_backup_x; }
|
||||
inline bool column_is_real(unsigned j) const { return !column_is_int(j); }
|
||||
lp_status get_status() const;
|
||||
void set_status(lp_status s);
|
||||
lp_status solve();
|
||||
void fill_explanation_from_crossed_bounds_column(explanation & evidence) const;
|
||||
bool term_is_used_as_row(unsigned term) const;
|
||||
bool tighten_term_bounds_by_delta(tv const& t, const impq&);
|
||||
lar_solver();
|
||||
void set_track_pivoted_rows(bool v);
|
||||
bool get_track_pivoted_rows() const;
|
||||
virtual ~lar_solver();
|
||||
const vector<impq>& r_x() const { return m_mpq_lar_core_solver.m_r_x; }
|
||||
bool column_is_int(unsigned j) const;
|
||||
bool column_value_is_int(unsigned j) const { return m_mpq_lar_core_solver.m_r_x[j].is_int(); }
|
||||
inline static_matrix<mpq, impq> & A_r() { return m_mpq_lar_core_solver.m_r_A; }
|
||||
inline const static_matrix<mpq, impq> & A_r() const { return m_mpq_lar_core_solver.m_r_A; }
|
||||
const impq& get_column_value(unsigned j) const { return m_mpq_lar_core_solver.m_r_x[j]; }
|
||||
inline
|
||||
var_index external_to_local(unsigned j) const {
|
||||
var_index local_j;
|
||||
if (m_var_register.external_is_used(j, local_j) ||
|
||||
m_term_register.external_is_used(j, local_j)) {
|
||||
return local_j;
|
||||
}
|
||||
else {
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
friend int_solver;
|
||||
friend int_branch;
|
||||
|
||||
};
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue