Hierarchical State Machines as Modular Horn Clauses

Pierre-Loïc Garoche
(DTIM, UFT, Onera - The French Aerospace Lab)
Temesghen Kahsai
(Nasa Ames / CMU)
Xavier Thirioux

In model based development, embedded systems are modeled using a mix of dataflow formalism, that capture the flow of computation, and hierarchical state machines, that capture the modal behavior of the system. For safety analysis, existing approaches rely on a compilation scheme that transform the original model (dataflow and state machines) into a pure dataflow formalism. Such compilation often result in loss of important structural information that capture the modal behaviour of the system. In previous work we have developed a compilation technique from a dataflow formalism into modular Horn clauses. In this paper, we present a novel technique that faithfully compile hierarchical state machines into modular Horn clauses. Our compilation technique preserves the structural and modal behavior of the system, making the safety analysis of such models more tractable.

In John P. Gallagher and Philipp Rümmer: Proceedings 3rd Workshop on Horn Clauses for Verification and Synthesis (HCVS2016), Eindhoven, The Netherlands, 3rd April 2016, Electronic Proceedings in Theoretical Computer Science 219, pp. 15–28.
Published: 14th July 2016.

ArXived at: http://dx.doi.org/10.4204/EPTCS.219.2 bibtex PDF
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