; COMMAND-LINE: --sygus-si=all  --sygus-out=status
; EXPECT: unsat

(set-logic UF)

(synth-fun f ((x Bool) (y Bool)) Bool
  ((Start Bool))
  ((Start Bool (true false x y (not Start) (= Start Start)))))

(declare-var x Bool)
(declare-var y Bool)

(constraint (= (f x y) (xor x y)))

(check-synth)