table T(bitstring).

free a, b, d: bitstring.
free c: channel.

process
	insert T(a); get T(=a) in 0 else out(c, choice[b,d])

(* EXPECTPV
RESULT Observational equivalence cannot be proved.
0.016s (user 0.016s + system 0.000s), max rss 8576K
END *)
