
use int.Int

val function f (x:int) : int

let main_f (y:int) : int
  ensures { result <> 42 }
=
  f y

val function g(x:int) : int

axiom g_def : forall x. g x = x+1

let main_g (y:int)
  ensures { result <> 44 }
=
  let z = g y in
  z+1