Model checking a cutoff number of {HEAD ~ processes} is performed to verify race freedom in {TAIL ~ the concurrent program} 
Model checking a cutoff number of { HEAD ~ processes } is performed to verify race freedom in { TAIL ~ the concurrent program }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL