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return an empty model when the status of the solver is neither FEASIBLE nor OPTIMAL

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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson 2020-04-13 16:36:44 -07:00
parent cb4ceeab3a
commit 6d8e5400fd
1 changed files with 5 additions and 1 deletions
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6
src/math/lp/lar_solver.cpp
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@ -1207,7 +1207,11 @@ void lar_solver::get_infeasibility_explanation_for_inf_sign(
// (x, y) != (x', y') => (x + delta*y) != (x' + delta*y')
void lar_solver::get_model(std::unordered_map<var_index, mpq> & variable_values) const {
lp_assert(get_status() == lp_status::OPTIMAL || get_status() == lp_status::FEASIBLE);
if (!(get_status() == lp_status::OPTIMAL || get_status() == lp_status::FEASIBLE)) {
variable_values.clear();
return;
}
lp_assert(m_mpq_lar_core_solver.m_r_solver.calc_current_x_is_feasible_include_non_basis());
variable_values.clear();
mpq delta = m_mpq_lar_core_solver.find_delta_for_strict_bounds(mpq(1, 2)); // start from 0.5 to have less clashes