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fix #3868

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-04-11 02:27:47 -07:00
parent 21a31fcd26
commit 03e411c22d
3 changed files with 12 additions and 28 deletions
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28
src/smt/theory_lra.cpp
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@ -2994,8 +2994,6 @@ public:
void assert_bound(bool_var bv, bool is_true, lp_api::bound& b) {
lp::constraint_index ci = b.get_constraint(is_true);
lp::column_index j = lp().to_column_index(b.get_var());
bool was_fixed = lp().is_fixed(j);
m_solver->activate(ci);
if (is_infeasible()) {
return;
@ -3008,7 +3006,7 @@ public:
++m_stats.m_assert_upper;
}
inf_rational const& value = b.get_value(is_true);
if (value.is_rational()) {
if (propagate_eqs() && value.is_rational()) {
propagate_eqs(b.tv(), ci, k, b, value.get_rational());
}
}
@ -3052,28 +3050,14 @@ public:
typedef std::pair<rational, bool> value_sort_pair;
typedef pair_hash<obj_hash<rational>, bool_hash> value_sort_pair_hash;
typedef map<value_sort_pair, theory_var, value_sort_pair_hash, default_eq<value_sort_pair> > value2var;
value2var m_fixed_var_table;
value2var m_fixed_var_table;
void propagate_eqs(lp::tv t, lp::constraint_index ci, lp::lconstraint_kind k, lp_api::bound& b, rational const& value) {
bool best_bound = false;
if (k == lp::GE) {
best_bound = set_lower_bound(t, ci, value);
if (k == lp::GE && set_lower_bound(t, ci, value) && has_upper_bound(t.index(), ci, value)) {
fixed_var_eh(b.get_var(), value);
}
else if (k == lp::LE) {
best_bound = set_upper_bound(t, ci, value);
}
if (propagate_eqs() && best_bound) {
if (k == lp::GE) {
if (has_upper_bound(t.index(), ci, value)) {
fixed_var_eh(b.get_var(), value);
}
}
else if (k == lp::LE) {
if (has_lower_bound(t.index(), ci, value)) {
fixed_var_eh(b.get_var(), value);
}
}
else if (k == lp::LE && set_upper_bound(t, ci, value) && has_lower_bound(t.index(), ci, value)) {
fixed_var_eh(b.get_var(), value);
}
}