
fun enc(bitstring,bitstring):bitstring.
fun dec(bitstring,bitstring):bitstring.

equation forall x:bitstring,k:bitstring; dec(enc(x,k),k) = x [linear].

process 0

(* EXPECTPV
Error: Cannot handle the following equations:
Error: These equations cannot be handled.
xtime: error in child process (status : 2)
END *)
