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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson 2020-06-16 11:00:26 -07:00
parent f7f9c15676
commit 431bb36cf5
3 changed files with 182 additions and 71 deletions
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26
src/math/lp/lar_solver.h
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@ -103,7 +103,10 @@ class lar_solver : public column_namer {
vector<impq> m_backup_x;
stacked_vector<unsigned> m_usage_in_terms;
// ((x[j], is_int(j))->j) for fixed j, used in equalities propagation
map<mpq, unsigned, obj_hash<mpq>, default_eq<mpq>> m_fixed_var_table;
// maps values to integral fixed vars
map<mpq, unsigned, obj_hash<mpq>, default_eq<mpq>> m_fixed_var_table_int;
// maps values to non-integral fixed vars
map<mpq, unsigned, obj_hash<mpq>, default_eq<mpq>> m_fixed_var_table_real;
// end of fields
////////////////// methods ////////////////////////////////
@ -285,12 +288,25 @@ class lar_solver : public column_namer {
void register_normalized_term(const lar_term&, lpvar);
void deregister_normalized_term(const lar_term&);
public:
const map<mpq, unsigned, obj_hash<mpq>, default_eq<mpq>>& fixed_var_table() const {
return m_fixed_var_table;
const map<mpq, unsigned, obj_hash<mpq>, default_eq<mpq>>& fixed_var_table_int() const {
return m_fixed_var_table_int;
}
map<mpq, unsigned, obj_hash<mpq>, default_eq<mpq>>& fixed_var_table() {
return m_fixed_var_table;
map<mpq, unsigned, obj_hash<mpq>, default_eq<mpq>>& fixed_var_table_int() {
return m_fixed_var_table_int;
}
const map<mpq, unsigned, obj_hash<mpq>, default_eq<mpq>>& fixed_var_table_real() const {
return m_fixed_var_table_real;
}
map<mpq, unsigned, obj_hash<mpq>, default_eq<mpq>>& fixed_var_table_real() {
return m_fixed_var_table_real;
}
bool find_in_fixed_tables(const rational& mpq, unsigned& j) const {
return column_is_int(j)? fixed_var_table_int().find(mpq, j) :
fixed_var_table_real().find(mpq, j);
}
template <typename T> void remove_non_fixed_from_table(T&);
unsigned external_to_column_index(unsigned) const;
bool inside_bounds(lpvar, const impq&) const;
inline void set_column_value(unsigned j, const impq& v) {