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fix objective value regression in simplex maximation

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2013-11-01 12:45:26 -07:00
parent 736d43c084
commit 2a907ea52a
3 changed files with 14 additions and 5 deletions
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9
src/opt/optimize_objectives.cpp
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@ -44,6 +44,8 @@ Notes:
#include "opt_solver.h"
#include "arith_decl_plugin.h"
#include "theory_arith.h"
#include "ast_pp.h"
#include "model_pp.h"
namespace opt {
@ -68,6 +70,7 @@ namespace opt {
arith_util autil(m);
opt_solver::scoped_push _push(*s);
opt_solver::toggle_objective _t(*s, true);
for (unsigned i = 0; i < objectives.size(); ++i) {
m_vars.push_back(s->add_objective(objectives[i].get()));
@ -76,7 +79,6 @@ namespace opt {
lbool is_sat = l_true;
// ready to test: is_sat = update_upper();
while (is_sat == l_true && !m_cancel) {
opt_solver::toggle_objective _t(*s, true);
is_sat = update_lower();
}
@ -89,12 +91,15 @@ namespace opt {
lbool optimize_objectives::update_lower() {
lbool is_sat = s->check_sat(0, 0);
if (is_sat == l_true) {
model_ref md;
s->get_model(md);
set_max(m_lower, s->get_objective_values());
IF_VERBOSE(1,
for (unsigned i = 0; i < m_lower.size(); ++i) {
verbose_stream() << m_lower[i] << " ";
}
verbose_stream() << "\n";);
verbose_stream() << "\n";
model_pp(verbose_stream(), *md););
expr_ref_vector disj(m);
expr_ref constraint(m);