Forward Analysis and Model Checking for Bounded WSTS∗

We investigate a subclass of well-structured transition systems (WSTS), the bounded—in the sense of Ginsburg and Spanier (Trans. AMS 1964)— complete deterministic ones, which we claim provide an adequate basis for the study of forward analyses as developed by Finkel and Goubault-Larrecq (ICALP 2009b). Indeed, we prove that, unlike other conditions considered previously for the termination of forward analysis, bounded-ness is decidable. Boundedness turns out to be a valuable restriction for WSTS verification, as we show that it further allows to decide all ω-regular properties on the set of infinite traces of the system.