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sketch of internal propagation

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2023-09-27 20:43:38 -07:00
parent 7207f0ff9c
commit 65e59e3ec4
1 changed files with 15 additions and 13 deletions
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28
src/math/lp/monomial_bounds.cpp
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@ -298,19 +298,21 @@ namespace nla {
u_dependency* monomial_bounds::explain_fixed(monic const& m, rational const& k) {
u_dependency* dep = nullptr;
for (auto j : m.vars()) {
if (k == 0) {
if (c().var_is_fixed_to_zero(j)) {
dep = c().lra.dep_manager().mk_join(dep, c().lra.get_column_lower_bound_witness(j));
dep = c().lra.dep_manager().mk_join(dep, c().lra.get_column_upper_bound_witness(j));
return dep;
}
continue;
}
if (c().var_is_fixed(j)) {
dep = c().lra.dep_manager().mk_join(dep, c().lra.get_column_lower_bound_witness(j));
dep = c().lra.dep_manager().mk_join(dep, c().lra.get_column_upper_bound_witness(j));
}
auto update_dep = [&](unsigned j) {
dep = c().lra.dep_manager().mk_join(dep, c().lra.get_column_lower_bound_witness(j));
dep = c().lra.dep_manager().mk_join(dep, c().lra.get_column_upper_bound_witness(j));
return dep;
};
if (k == 0) {
for (auto j : m.vars())
if (c().var_is_fixed_to_zero(j))
return update_dep(j);
}
else {
for (auto j : m.vars())
if (c().var_is_fixed(j))
update_dep(j);
}
return dep;
}