Aschipdesignbecomeslargerandmorecomplex,verificationengineersareexpandingconstrained-randomtestingtomeetthevalidationdemand.Thesizeandcomplexityofconstraintproblemsaregrowing,resultinginperformanceandcapacityissues.Thispaperdiscussesthekeychallengesverificationengineersfacewhenwritingcons