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use var equivalence when evaluating the interval over an expression

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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson 2019-08-21 14:35:21 -07:00
parent 81a9edae7e
commit 108bfa55ad
6 changed files with 40 additions and 10 deletions
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25
src/math/lp/nla_intervals.cpp
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@ -32,6 +32,17 @@ void intervals::set_var_interval_with_deps(lpvar v, interval& b) const {
}
}
void intervals::set_zero_interval_with_explanation(interval& i, const lp::explanation& exp) const {
auto val = rational(0);
m_config.set_lower(i, val);
m_config.set_lower_is_open(i, false);
m_config.set_lower_is_inf(i, false);
m_config.set_upper(i, val);
m_config.set_upper_is_open(i, false);
m_config.set_upper_is_inf(i, false);
i.m_lower_dep = i.m_upper_dep = mk_dep(exp);
}
void intervals::set_zero_interval_deps_for_mult(interval& a) {
a.m_lower_dep = m_dep_manager.mk_join(a.m_lower_dep, a.m_upper_dep);
a.m_upper_dep = a.m_lower_dep;
@ -74,7 +85,19 @@ bool intervals::check_interval_for_conflict_on_zero_lower(const interval & i) {
intervals::ci_dependency *intervals::mk_dep(lp::constraint_index ci) const {
return m_dep_manager.mk_leaf(ci);
}
intervals::ci_dependency *intervals::mk_dep(const lp::explanation& expl) const {
intervals::ci_dependency * r = nullptr;
for (auto p : expl) {
if (r == nullptr) {
r = m_dep_manager.mk_leaf(p.second);
} else {
r = m_dep_manager.mk_join(r, m_dep_manager.mk_leaf(p.second));
}
}
return r;
}
std::ostream& intervals::display(std::ostream& out, const interval& i) const {
if (m_imanager.lower_is_inf(i)) {