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randomise branches in int_solver

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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson 2020-01-31 14:38:28 -08:00
parent d2fc88d675
commit abb13f8c76
3 changed files with 109 additions and 90 deletions
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10
src/math/lp/int_solver.h
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@ -44,6 +44,7 @@ public:
explanation *m_ex; // the conflict explanation
bool m_upper; // we have a cut m_t*x <= k if m_upper is true nad m_t*x >= k otherwise
hnf_cutter m_hnf_cutter;
unsigned m_hnf_cut_period;
// methods
int_solver(lar_solver* lp);
@ -97,7 +98,12 @@ private:
bool non_basic_columns_are_at_bounds() const;
bool is_feasible() const;
bool column_is_int_inf(unsigned j) const;
void trace_inf_rows() const;
std::ostream& display_inf_rows(std::ostream&) const;
bool should_find_cube();
bool should_run_gcd_test();
bool should_gomory_cut();
bool should_hnf_cut();
lia_move branch_or_sat();
int find_any_inf_int_column_basis_first();
int find_inf_int_base_column();
@ -110,7 +116,7 @@ private:
lia_move proceed_with_gomory_cut(unsigned j);
bool is_gomory_cut_target(const row_strip<mpq>&);
bool at_bound(unsigned j) const;
bool has_low(unsigned j) const;
bool has_lower(unsigned j) const;
bool has_upper(unsigned j) const;
unsigned row_of_basic_column(unsigned j) const;