(set-logic ALL)
(set-info :status sat)
(declare-fun A () (Bag Int))
(declare-fun B () (Bag Int))
(declare-fun x () Int)
(declare-fun y () Int)
(assert (= A (union_max (bag x 1) (bag y 2))))
(assert (= A (union_disjoint B (bag y 2))))
(assert (= x y))
(check-sat)