FIREProblemId is an option for
FIREPrepareStartFile and other functions of the FIRE
interface.
It specifies the problem ID for the reduction. The default value is
4242.
Overview, FIREBucket, FIRECompressor, FIREFthreads, FIRELthreads, FIREThreads, FIREPosPref, FIRESthreads.