added loop testcase
added loop testcase

axt/angr,angr/angr,chubbymaggie/angr,fjferrer/angr,haylesr/angr,schieb/angr,iamahuman/angr,GuardianRG/angr,lowks/angr,f-prettyland/angr,angr/angr,mingderwang/angr,zhuyue1314/angr,terry2012/angr,mingderwang/angr,iamahuman/angr,f-prettyland/angr,tyb0807/angr,xurantju/angr,axt/angr,chubbymaggie/angr,schieb/angr,cureHsu/angr,schieb/angr,avain/angr,iamahuman/angr,xurantju/angr,zhuyue1314/angr,avain/angr,haylesr/angr,fjferrer/angr,GuardianRG/angr,tyb0807/angr,terry2012/angr,axt/angr,chubbymaggie/angr,cureHsu/angr,tyb0807/angr,angr/angr,lowks/angr,f-prettyland/angr