Symbolic Step Encodings for Object Based Communicating State Machines

  • Authors:

  • Jori Dubrovin;Tommi Junttila;Keijo Heljanko

  • Affiliations:

  • Department of Information and Computer Science, Helsinki University of Technology (TKK), Finland FI-02015 TKK;Department of Information and Computer Science, Helsinki University of Technology (TKK), Finland FI-02015 TKK;Department of Information and Computer Science, Helsinki University of Technology (TKK), Finland FI-02015 TKK

  • Venue:
  • FMOODS '08 Proceedings of the 10th IFIP WG 6.1 international conference on Formal Methods for Open Object-Based Distributed Systems
  • Year:
  • 2008

Quantified Score

Hi-index 0.00

Visualization

Abstract

In this work, novel symbolic step encodings of the transition relation for object based communicating state machines are presented. This class of systems is tailored to capture the essential data manipulation features of UML state machines when enriched with a Java-like object oriented action language. The main contribution of the work is the generalization of the $\exists$-step semantics approach, which Rintanen has used for improving the efficiency of SAT based AI planning, to a much more complex class of systems. Furthermore, the approach is extended to employ a dynamic notion of independence. To evaluate the encodings, UML state machine models are automatically translated into NuSMV models and then symbolically model checked with NuSMV. Especially in bounded model checking (BMC), the $\exists$-step semantics often significantly outperforms the traditional interleaving semantics without any substantial blowup in the BMC encoding as a SAT formula.