Analyzing Guarded Protocols: Better Cutoffs, More Systems, More Expressivity

Jacobs, Swen and Sakr, Mouhammad
(2018) Analyzing Guarded Protocols: Better Cutoffs, More Systems, More Expressivity.
In: Verification, Model Checking, and Abstract Interpretation - 19th International Conference, VMCAI 2018, Proceedings.
Conference: VMCAI Verification, Model Checking and Abstract Interpretation


Download (456kB) | Preview
Official URL:


We study cutoff results for parameterized verification and synthesis of guarded protocols, as introduced by Emerson and Kahlon (2000). Guarded protocols describe systems of processes whose transitions are enabled or disabled depending on the existence of other processes in certain local states. Cutoff results reduce reasoning about systems with an arbitrary number of processes to systems of a determined, fixed size. Our work is based on the observation that existing cutoff results for guarded protocols are often impractical, since they scale linearly in the number of local states of processes in the system. We provide new cutoffs that scale not with the number of local states, but with the number of guards in the system, which is in many cases much smaller. Furthermore, we consider generalizations of the type of guards and of the specifications under consideration, and present results for problems that have not been known to admit cutoffs before.


Actions (login required)

View Item View Item