Enq all fifos when r is 0
Enq all fifos when r is 1
Deq fifo 1 value 1
Deq fifo 2 value 2
Deq fifo 3 value 3
Deq fifo 4 value 4
Deq fifo 5 value 5
Deq fifo 6 value 6
Deq fifo 7 value 7
Simulation deadlocked