(benchmark Isabelle
:extrasorts ( T2 T1)
:extrafuns (
  (uf_2 T1)
  (uf_3 T2)
  (uf_4 T1)
 )
:extrapreds (
  (up_1 T1 T2)
 )
:assumption (forall (?x1 T1) (?x2 T2) (iff (up_1 ?x1 ?x2) (= ?x1 uf_2)))
:assumption (iff (forall (?x3 T1) (exists (?x4 T2) (up_1 ?x3 ?x4))) (forall (?x5 T1) (up_1 ?x5 uf_3)))
:assumption (not (iff (exists (?x6 T2) (up_1 uf_4 ?x6)) (up_1 uf_4 uf_3)))
:formula true
)
