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for Clemens: ensure fixed values are propagated after registration

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Also allow to register expressions that the rewriter changes to ensure they get picked up.
This commit is contained in:
Nikolaj Bjorner 2022-01-19 14:38:11 +01:00
parent 5b0389615b
commit 0f03ef4ab0
7 changed files with 129 additions and 45 deletions
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24
src/smt/smt_context.cpp
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@ -2906,6 +2906,30 @@ namespace smt {
m_user_propagator->new_fixed_eh(v, val, sz, explain);
}
bool context::is_fixed(enode* n, expr_ref& val, literal_vector& explain) {
if (m.is_bool(n->get_expr())) {
literal lit = get_literal(n->get_expr());
switch (get_assignment(lit)) {
case l_true:
val = m.mk_true(); explain.push_back(lit); return true;
case l_false:
val = m.mk_false(); explain.push_back(~lit); return true;
default:
return false;
}
}
theory_var_list * l = n->get_th_var_list();
while (l) {
theory_id tid = l->get_id();
auto* p = m_theories.get_plugin(tid);
if (p && p->is_fixed(l->get_var(), val, explain))
return true;
l = l->get_next();
}
return false;
}
void context::push() {
pop_to_base_lvl();
setup_context(false);