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snap variables to bounds when maximizing terms

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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson 2019-03-13 15:28:50 -07:00
parent 75b1e8fe27
commit f336039da3
6 changed files with 80 additions and 69 deletions
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3
src/util/lp/int_solver.h
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@ -55,7 +55,6 @@ public:
explanation const& get_explanation() const { return m_ex; }
bool is_upper() const { return m_upper; }
bool move_non_basic_column_to_bounds(unsigned j);
bool is_base(unsigned j) const;
bool is_real(unsigned j) const;
const impq & lower_bound(unsigned j) const;
@ -95,7 +94,6 @@ private:
bool is_fixed(unsigned j) const;
bool is_free(unsigned j) const;
bool value_is_int(unsigned j) const;
void set_value_for_nbasic_column(unsigned j, const impq & new_val);
void set_value_for_nbasic_column_ignore_old_values(unsigned j, const impq & new_val);
bool non_basic_columns_are_at_bounds() const;
bool is_feasible() const;
@ -108,7 +106,6 @@ private:
int get_kth_inf_int(unsigned) const;
lp_settings& settings();
const lp_settings& settings() const;
bool move_non_basic_columns_to_bounds();
void branch_infeasible_int_var(unsigned);
lia_move mk_gomory_cut(unsigned inf_col, const row_strip<mpq>& row);
lia_move proceed_with_gomory_cut(unsigned j);