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remove explanation.reset() and fixes in add_var_bound()

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Signed-off-by: Lev <levnach@hotmail.com>
This commit is contained in:
Lev 2018-11-09 10:04:08 -08:00 • committed by Lev Nachmanson
parent 1d51c5689e
commit 2993453798
4 changed files with 15 additions and 8 deletions
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15
src/util/lp/lar_solver.cpp
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@ -304,7 +304,9 @@ lp_status lar_solver::solve() {
}
void lar_solver::fill_explanation_from_infeasible_column(explanation & evidence) const{
lp_assert(static_cast<int>(get_column_type(m_infeasible_column)) >= static_cast<int>(column_type::boxed));
lp_assert(!m_mpq_lar_core_solver.m_r_solver.column_is_feasible(m_infeasible_column));
// this is the case when the lower bound is in conflict with the upper one
const ul_pair & ul = m_columns_to_ul_pairs[m_infeasible_column];
evidence.push_justification(ul.upper_bound_witness(), numeric_traits<mpq>::one());
@ -1960,6 +1962,8 @@ void lar_solver::update_column_type_and_bound_with_no_ub(unsigned j, lp::lconstr
void lar_solver::update_bound_with_ub_lb(var_index j, lconstraint_kind kind, const mpq & right_side, constraint_index ci) {
lp_assert(column_has_lower_bound(j) && column_has_upper_bound(j));
lp_assert(m_mpq_lar_core_solver.m_column_types[j] == column_type::boxed ||
m_mpq_lar_core_solver.m_column_types[j] == column_type::fixed);
mpq y_of_bound(0);
switch (kind) {
@ -2003,17 +2007,20 @@ void lar_solver::update_bound_with_ub_lb(var_index j, lconstraint_kind kind, con
set_upper_bound_witness(j, ci);
set_lower_bound_witness(j, ci);
m_mpq_lar_core_solver.m_r_upper_bounds[j] = m_mpq_lar_core_solver.m_r_lower_bounds[j] = v;
m_mpq_lar_core_solver.m_column_types[j] = column_type::fixed;
break;
}
default:
lp_unreachable();
}
if (m_mpq_lar_core_solver.m_r_upper_bounds[j] == m_mpq_lar_core_solver.m_r_lower_bounds[j]) {
m_mpq_lar_core_solver.m_column_types[j] = column_type::fixed;
}
}
void lar_solver::update_bound_with_no_ub_lb(var_index j, lconstraint_kind kind, const mpq & right_side, constraint_index ci) {
lp_assert(column_has_lower_bound(j) && !column_has_upper_bound(j));
lp_assert(m_mpq_lar_core_solver.m_column_types[j] == column_type::lower_bound);
mpq y_of_bound(0);
switch (kind) {
case LT:
@ -2065,7 +2072,7 @@ void lar_solver::update_bound_with_no_ub_lb(var_index j, lconstraint_kind kind,
void lar_solver::update_bound_with_ub_no_lb(var_index j, lconstraint_kind kind, const mpq & right_side, constraint_index ci) {
lp_assert(!column_has_lower_bound(j) && column_has_upper_bound(j));
lp_assert(m_mpq_lar_core_solver.m_column_types[j] == column_type::upper_bound);
mpq y_of_bound(0);
switch (kind) {
case LT: