Modeling and Verifying Concurrent Programs with Finite Chu Spaces

Abstract

Finite Chu spaces are proposed for the modeling and verification of concurrent programs. In order to model not only typical concurrent behaviors but also modern exception handling and synchronization mechanisms, we design an enriched process algebra of Chu spaces from a practical point of view. To illustrate the power of finite Chu spaces and the process algebra while abstracting away from language-specific details, an imaginary concurrent programming language (ICL) is designed. A denotational semantics of ICL is presented using finite Chu spaces and the enriched process algebra. The valuation functions are fairly straightforward since the carefully designed operators have done much of the job. The enriched process algebra is also used as the specification language for Chu spaces, with which process-algebraic properties can be specified. Verification algorithms are presented with their time complexities discussed.

Modeling Control Flow in WS-BPEL with Chu Spaces

“…Process-algebraic properties can be specified, for example, as Verifying a process Chu space against a property Chu space can be achieved by matching them in a certain way. We have developed algorithms for verifying this kind of properties against Chu spaces in Du et al (2010).…”

“…We have implemented a prototype tool which automatically transforms a WS-BPEL program into a BPEL-CF one, and then computes the Chu spaces semantics of it. Verification methods described in Du et al (2010) have also been implemented. We hope to make the tool freely available on Internet soon.…”

Comparing Process Behaviors with Finite Chu Spaces

“…automata, Petri nets and process calculi), Chu spaces support both the true concurrency semantics and compositional algebraic manipulation simultaneously. Moreover, Chu spaces have unique structures that support efficient verification algorithms for process-algebraic specifications [4]. Theoretical researches on Chu spaces have been fruitful (e.g.…”

“…[5]- [7]). Applications of Chu spaces include the modeling of RTL (Register Transfer Level) [8], Verilog [9], general concurrent programs [4], WS-BPEL [10], and physical systems [11]. However, there is no research on how to measure the degree of similarity between Chu spaces until now.…”