support running without a state, to avoid redoing testcases
support running without a state, to avoid redoing testcases

axt/angr,angr/simuvex,angr/angr,axt/angr,iamahuman/angr,axt/angr,tyb0807/angr,f-prettyland/angr,schieb/angr,angr/angr,schieb/angr,chubbymaggie/angr,iamahuman/angr,f-prettyland/angr,tyb0807/angr,chubbymaggie/simuvex,angr/angr,chubbymaggie/simuvex,iamahuman/angr,chubbymaggie/angr,f-prettyland/angr,tyb0807/angr,chubbymaggie/angr,schieb/angr,chubbymaggie/simuvex