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Add push/pop to box optimization

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Anh-Dung Phan 2013-11-26 14:16:59 -08:00
parent 4aa9c742ab
commit 5ed8a48ac2
4 changed files with 29 additions and 9 deletions
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src/smt/theory_diff_logic_def.h
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@ -1028,6 +1028,7 @@ inf_eps_rational<inf_rational> theory_diff_logic<Ext>::maximize(theory_var v) {
network_flow<GExt> net_flow(m_graph, balances);
min_flow_result result = net_flow.min_cost();
SASSERT(result != UNBOUNDED);
if (result == OPTIMAL) {
numeral objective_value = net_flow.get_optimal_solution(m_objective_assignments[v], true) + numeral(m_objective_consts[v]);
IF_VERBOSE(1, verbose_stream() << "Optimal value of objective " << v << ": " << objective_value << std::endl;);
@ -1059,6 +1060,8 @@ inf_eps_rational<inf_rational> theory_diff_logic<Ext>::maximize(theory_var v) {
return inf_eps_rational<inf_rational>(inf_rational(r, i));
}
else {
// Dual problem is infeasible, primal problem is unbounded
SASSERT(result == INFEASIBLE);
IF_VERBOSE(1, verbose_stream() << "Unbounded objective" << std::endl;);
return inf_eps_rational<inf_rational>::infinity();
}