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restore move_non_basic_to_bounds

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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson 2023-10-05 18:14:52 -07:00
parent b61f4ac51f
commit bf3817ef7c
4 changed files with 12 additions and 8 deletions
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11
src/math/lp/lar_solver.cpp
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@ -181,7 +181,10 @@ namespace lp {
lp_status lar_solver::get_status() const { return m_status; }
void lar_solver::set_status(lp_status s) { m_status = s; }
void lar_solver::set_status(lp_status s) {
TRACE("lar_solver", tout << "setting status to " << s << "\n";);
m_status = s;
}
lp_status lar_solver::find_feasible_solution() {
stats().m_make_feasible++;
@ -419,9 +422,7 @@ namespace lp {
void lar_solver::move_non_basic_columns_to_bounds(bool shift_randomly) {
auto& lcs = m_mpq_lar_core_solver;
bool change = false;
for (unsigned j : m_columns_with_changed_bounds) {
if (lcs.m_r_heading[j] >= 0)
continue;
for (unsigned j : lcs.m_r_nbasis) {
if (move_non_basic_column_to_bounds(j, shift_randomly))
change = true;
}
@ -439,7 +440,7 @@ namespace lp {
switch (lcs.m_column_types()[j]) {
case column_type::boxed: {
bool at_l = val == lcs.m_r_lower_bounds()[j];
bool at_u = !at_l && (val == lcs.m_r_upper_bounds()[j]);
bool at_u = (!at_l && (val == lcs.m_r_upper_bounds()[j]));
if (!at_l && !at_u) {
if (m_settings.random_next() % 2)
set_value_for_nbasic_column(j, lcs.m_r_lower_bounds()[j]);