Set *s3 = solver->createSet(0, set3, 4);
Element *e1 = solver->getElementConst(4, 5);
Element *e2 = solver->getElementVar(s3);
Set *domain2[] = {s1, s3};
Set *s3 = solver->createSet(0, set3, 4);
Element *e1 = solver->getElementConst(4, 5);
Element *e2 = solver->getElementVar(s3);
Set *domain2[] = {s1, s3};