HTCondor job walltime limit can be requested by command:
date -d @`condor_q -af "JobStartDate+MaxRunTime"` ... time of killing job
condor_q -af "JobStartDate+MaxRunTime-CurrentTime" | awk '{printf "%02d:%02d:%02d\n",$0/3600,$0%3600/60,$0%60}' ... time to killing job