FastAVN: refactoring and allowing k=0 (only keep the body of entrypoint)
FastAVN: refactoring and allowing k=0 (only keep the body of entrypoint)

boogie-org/corral,boogie-org/corral,boogie-org/corral,boogie-org/corral,boogie-org/corral,boogie-org/corral,boogie-org/corral