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restore lar_solver::add_named_var

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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson 2025-05-08 17:18:41 -07:00
parent 935f076a05
commit 7da06df64f
2 changed files with 11 additions and 13 deletions
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23
src/math/lp/lar_solver.cpp
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@ -1289,6 +1289,11 @@ namespace lp {
#endif
return true;
}
lpvar lar_solver::add_named_var(unsigned ext_j, bool is_int, const std::string& name) {
lpvar j = add_var(ext_j, is_int);
m_imp->m_var_register.set_name(j, name);
return j;
}
bool lar_solver::inf_explanation_is_correct() const {
#ifdef Z3DEBUG
@ -1415,33 +1420,25 @@ namespace lp {
#if 1
if(is_upper) {
unsigned current_update_index = ul.previous_upper();
while (current_update_index != UINT_MAX) {
auto const& [_is_upper, _j, _bound, _column] = m_imp->m_column_updates[current_update_index];
if (ul.previous_upper() != UINT_MAX) {
auto const& [_is_upper, _j, _bound, _column] = m_imp->m_column_updates[ul.previous_upper()];
auto new_slack = slack + coeff * (_bound - get_upper_bound(j));
if (sign == get_sign(new_slack)) {
//verbose_stream() << "can weaken upper j" << j << " " << coeff << " " << get_upper_bound(j) << " " << _bound << "\n";
slack = new_slack;
bound_constr_i = _column.upper_bound_witness();
current_update_index = _column.previous_upper(); // Move to the next previous bound in the list
} else
break; // Stop if weakening is not possible with this previous bound
}
}
}
else {
unsigned prev_l = ul.previous_lower();
while (prev_l != UINT_MAX) {
auto const& [_is_upper, _j, _bound, _column] = m_imp->m_column_updates[prev_l];
if (ul.previous_lower() != UINT_MAX) {
auto const& [_is_upper, _j, _bound, _column] = m_imp->m_column_updates[ul.previous_lower()];
auto new_slack = slack + coeff * (_bound - get_lower_bound(j));
if (sign == get_sign(new_slack)) {
//verbose_stream() << "can weaken lower j" << j << " " << coeff << " " << get_lower_bound(j) << " " << _bound << "\n";
slack = new_slack;
bound_constr_i = _column.lower_bound_witness();
prev_l = _column.previous_lower();
}
else
break;
}
}
#endif

1
src/math/lp/lar_solver.h
View file

@ -296,6 +296,7 @@ public:
lar_term t;
};
lpvar add_named_var(unsigned ext_j, bool is_integer, const std::string&);
void solve_for(unsigned_vector const& js, vector<solution>& sol);
void check_fixed(unsigned j);
void solve_for(unsigned j, uint_set& tabu, vector<solution>& sol);