25 lines
364 B
Promela

mtype = { nice, rude };
chan request = [0] of { mtype };
chan reply = [0] of { mtype };
active proctype Server() {
mtype msg;
end:
do
:: request ? msg -> reply ! msg
od
}
active proctype NiceClient() {
mtype msg;
request ! nice;
reply ? msg;
assert (msg == nice)
}
active proctype RudeClient() {
mtype msg;
request ! rude;
reply ? msg
}