Compositional and symbolic model-checking of real-time systems

  • Authors:
  • K. G. Larsen;P. Pettersson;Wang Yi

  • Affiliations:
  • -;-;-

  • Venue:
  • RTSS '95 Proceedings of the 16th IEEE Real-Time Systems Symposium
  • Year:
  • 1995

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Abstract

Efficient automatic model-checking algorithms for real-time systems have been obtained in recent years based on the state-region graph technique of Alur, Courcoubetis and Dill (1990). However, these algorithms are faced with two potential types of explosion arising from parallel composition: explosion in the space of control nodes, and explosion in the region space over clock-variables. In this paper we attack these explosion problems by developing and combining compositional and symbolic model-checking techniques. The presented techniques provide the foundation for a new automatic verification tool UPPAAL. Experimental results indicate that UPPAAL performs time- and space-wise favorably compared with other real-time verification tools.