Variables: 
bool[1]: "traffic.b" 
int[1]: "traffic.s" 
chan[1]: "traffic.B[0]" 
chan[2]: "traffic.B[1]" 
chan[3]: "traffic.S" 

Event graph: 
event[0]: fork: null, #pred: 0, succ: 1 

# process[1]:
event[1]: receive: traffic.S?(traffic.s), pid: 1, #pred: 1, succ: 2 
channel deps: 3 
event[2]: receive: traffic.B[traffic.s]?(traffic.b), pid: 1, #pred: 1, succ: 1 
int deps: 1 
channel deps: 1 2 

