Maintain the relations between each block in sliceinfo.
Maintain the relations between each block in sliceinfo.

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