in include/PatriciaTreeOverUnderSetAbstractDomain.h [195:205]
void add(const PatriciaTreeOverUnderSetAbstractDomain& other) {
if (this->is_top() || other.is_bottom()) {
return;
} else if (other.is_top()) {
this->set_to_top();
} else if (this->is_bottom()) {
this->set_to_value(*other.get_value());
} else {
this->get_value()->add(*other.get_value());
}
}