free c:channel.

const a:bitstring.
const b:bitstring.

fun f():bitstring.
fun g():bitstring.
fun e():bitstring.

equation f() = g().
equation f() = e().

free ok:bitstring [private].

query attacker(ok).

process
  out(c,f());
  out(c,g());
  out(c,e());
  out(c,ok)

(* EXPECTPV
RESULT not attacker(ok[]) is false.
0.008s (user 0.008s + system 0.000s), max rss 7376K
END *)
