void euf_arith_mbi_plugin::filter_private_arith(app_ref_vector& avars) {
arith_util a(m);
unsigned j = 0;
obj_hashtable<func_decl> shared;
for (func_decl* f : m_shared) shared.insert(f);
for (unsigned i = 0; i < avars.size(); ++i) {
app* v = avars.get(i);
if (!shared.contains(v->get_decl()) &&
v->get_family_id() != a.get_family_id()) {
avars[j++] = v;
}
}
avars.shrink(j);
}
bool solve(model& model, app_ref_vector& vars, expr_ref_vector& lits) {
expr_mark is_var, is_rem;
if (vars.empty()) {
return false;
}
bool reduced = false;
for (unsigned i = 0; i < vars.size(); ++i) {
is_var.mark(vars[i].get());
}
expr_ref tmp(m), t(m), v(m);
th_rewriter rw(m);
for (unsigned i = 0; i < lits.size(); ++i) {
expr* e = lits[i].get(), *l, *r;
if (m.is_eq(e, l, r) && reduce_eq(is_var, l, r, v, t)) {
reduced = true;
project_plugin::erase(lits, i);
expr_safe_replace sub(m);
sub.insert(v, t);
is_rem.mark(v);
for (unsigned j = 0; j < lits.size(); ++j) {
sub(lits[j].get(), tmp);
rw(tmp);
lits[j] = tmp;
}
}
}
if (reduced) {
unsigned j = 0;
for (unsigned i = 0; i < vars.size(); ++i) {
if (!is_rem.is_marked(vars[i].get())) {
if (i != j) {
vars[j] = vars[i].get();
}
++j;
}
}
vars.shrink(j);
}
return reduced;
}
