test/regress/regress0/simple-uf.smtv1.smt2

   1 (set-option :incremental false)
   2 (set-info :status unsat)
   3 (set-logic QF_UF)
   4 (declare-sort U 0)
   5 (declare-sort A 0)
   6 (declare-sort B 0)
   7 (declare-fun f (A) B)
   8 (declare-fun x () A)
   9 (declare-fun y () A)
  10 (check-sat-assuming ( (not (=> (= x y) (= (f x) (f y)))) ))