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fix a bug in the lar_solver::m_status update during push/pop

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

progress in gomory cut

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

the first version of Gomory cut, probably broken

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

rename a function

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

gomory cut worked on a toy example

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

track the set of integer variables that are not set to integer values

Signed-off-by: Lev Nachmanson <levnach@microsoft.com>
This commit is contained in:
Lev Nachmanson 2017-07-10 16:34:23 -07:00 • committed by Lev Nachmanson
parent 0164ea9abb
commit aba7dcab3e
21 changed files with 682 additions and 455 deletions
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src/util/lp/lp_primal_simplex.hpp
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@ -231,7 +231,7 @@ template <typename T, typename X> void lp_primal_simplex<T, X>::fill_A_x_and_bas
template <typename T, typename X> void lp_primal_simplex<T, X>::solve_with_total_inf() {
int total_vars = this->m_A->column_count() + this->row_count();
if (total_vars == 0) {
this->m_status = OPTIMAL;
this->m_status = lp_status::OPTIMAL;
return;
}
m_low_bounds.clear();