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Code Activity

solve send-more-money_lev.smt2

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Signed-off-by: Lev Nachmanson <levnach@microsoft.com>

handle integer vars in random_update

Signed-off-by: Lev Nachmanson <levnach@microsoft.com>

call the assert in gomory_cut and branching to a correct place

Signed-off-by: Lev Nachmanson <levnach@microsoft.com>

fixes in goromy cut

Signed-off-by: Lev Nachmanson <levnach@microsoft.com>

disable x values tracking in random_update

Signed-off-by: Lev Nachmanson <levnach@microsoft.com>

more fixes in gomory cut

Signed-off-by: Lev Nachmanson <levnach@microsoft.com>

change in mk_bound by Nikolaj

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

fixes in gomory cut and setup

Signed-off-by: Lev Nachmanson <levnach@microsoft.com>

fixes in int_solver

Signed-off-by: Lev Nachmanson <levnach@microsoft.com>

change a printout

Signed-off-by: Lev Nachmanson <levnach@microsoft.com>

fix by Nikolaj in treating terms returned by int_solver

Signed-off-by: Lev Nachmanson <levnach@microsoft.com>

fix syntax

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

fix a free coefficient bug in bound propagaion and simplify gomory cut

Signed-off-by: Lev Nachmanson <levnach@microsoft.com>

avoid tracking pivoted rows during int_solver::check()
This commit is contained in:
Lev Nachmanson 2017-07-27 10:49:00 -07:00 • committed by Lev Nachmanson
parent aba7dcab3e
commit db8f01894f
31 changed files with 894 additions and 767 deletions
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10
src/util/lp/lp_settings.h
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@ -221,7 +221,8 @@ public:
max_row_length_for_bound_propagation(300),
backup_costs(true),
column_number_threshold_for_using_lu_in_lar_solver(4000),
m_int_branch_cut_threshold(10000000)
m_int_branch_cut_gomory_threshold(4),
m_run_gcd_test(true)
{}
void set_resource_limit(lp_resource_limit& lim) { m_resource_limit = &lim; }
@ -324,11 +325,12 @@ public:
#endif
bool use_breakpoints_in_feasibility_search;
unsigned random_next() { return m_rand(); }
void random_seed(unsigned s) { m_rand.set_seed(s); }
void set_random_seed(unsigned s) { m_rand.set_seed(s); }
unsigned max_row_length_for_bound_propagation;
bool backup_costs;
unsigned column_number_threshold_for_using_lu_in_lar_solver;
unsigned m_int_branch_cut_threshold;
unsigned m_int_branch_cut_gomory_threshold;
bool m_run_gcd_test;
}; // end of lp_settings class
@ -351,7 +353,7 @@ inline std::string T_to_string(const numeric_pair<mpq> & t) {
inline std::string T_to_string(const mpq & t) {
std::ostringstream strs;
strs << t.get_double();
strs << t;
return strs.str();
}