free net:channel.

type nonce.

free n: nonce.

table cconn(bitstring,bitstring,nonce).

not a:bitstring, b:bitstring; table(cconn(a, b, new x)) phase 2.

query a:bitstring, b:bitstring, c:nonce;
      table(cconn(a,b,c)).

process
    new x: nonce;
    in(net, (a:bitstring, b:bitstring));
    insert cconn(a,b,x)

(* EXPECTPV
Error: you have given a secrecy assumption that I could not verify.
xtime: error in child process (status : 2)
END *)
