/**
* Augments the CFSM with a tracking channel and send synthetic messages on this channel to keep
* track of the two events that are part of the binary invariant inv. Adds the synthetic events to
* the CFSM alphabet.
*/
private void augmentWithBinInvTracing(BinaryInvariant inv) {
DistEventType e1 = inv.getFirst();
DistEventType e2 = inv.getSecond();
assert alphabet.contains(e1);
assert alphabet.contains(e2);
assert e1.getPid() < fsms.size();
assert e2.getPid() < fsms.size();
assert !invs.contains(invs);
invs.add(inv);
int scmId = this.channelIds.size();
if (firstSyntheticChIndex > scmId) {
firstSyntheticChIndex = scmId;
}
// Create and add a new invariant-specific channel.
ChannelId invCid = new InvChannelId(inv, scmId);
this.channelIds.add(invCid);
// Update the FSM corresponding to e1.
Set<FSMState> visited = Util.newSet();
FSM f1 = this.fsms.get(e1.getPid());
DistEventType e1Tracer1 = DistEventType.SynthSendEvent(e1, invCid, true);
DistEventType e1Tracer2 = DistEventType.SynthSendEvent(e1, invCid, false);
addSendToEventTx(f1, e1, e1Tracer1, e1Tracer2, visited);
this.alphabet.add(e1Tracer1);
this.alphabet.add(e1Tracer2);
// Update the FSM corresponding to e2.
visited.clear();
FSM f2 = this.fsms.get(e2.getPid());
DistEventType e2Tracer1 = DistEventType.SynthSendEvent(e2, invCid, true);
DistEventType e2Tracer2 = DistEventType.SynthSendEvent(e2, invCid, false);
addSendToEventTx(f2, e2, e2Tracer1, e2Tracer2, visited);
this.alphabet.add(e2Tracer1);
this.alphabet.add(e2Tracer2);
inv.setFirstSynthTracers(e1Tracer1, e1Tracer2);
inv.setSecondSynthTracers(e2Tracer1, e2Tracer2);
}
