void project_plugin::partition_args(model& model, app_ref_vector const& selects, expr_ref_vector& lits) {
ast_manager& m = selects.get_manager();
if (selects.empty()) return;
unsigned num_args = selects[0]->get_decl()->get_arity();
for (unsigned j = 1; j < num_args; ++j) {
expr_ref_vector args(m);
for (unsigned i = 0; i < selects.size(); ++i) {
args.push_back(selects[i]->get_arg(j));
}
project_plugin::partition_values(model, args, lits);
}
}
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;
}
