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Discrete and continuous strategies for timed-arc Petri net games

  • Peter Gjøl JensenEmail author
  • Kim Guldstrand Larsen
  • Jiří Srba
SPIN 2016

Abstract

Automatic strategy synthesis for a given control objective can be used to generate correct-by-construction controllers of real-time reactive systems. The existing symbolic approach for continuous timed game is a computationally hard task and current tools like UPPAAL TiGa often scale poorly with the model complexity. We suggest an explicit approach for strategy synthesis in the discrete-time setting and show that even for systems with closed guards, the existence of a safety discrete-time strategy does not imply the existence of a safety continuous-time strategy and vice versa. Nevertheless, we prove that the answers to the existence of discrete-time and continuous-time safety strategies coincide on a practically motivated subclass of urgent controllers that either react immediately after receiving an environmental input or wait with the decision until a next event is triggered by the environment. We then develop an on-the-fly synthesis algorithm for discrete timed-arc Petri net games. The algorithm is implemented in our tool TAPAAL, and based on the experimental evidence, we discuss the advantages of our approach compared to the symbolic continuous-time techniques.

Keywords

Timed-arc Petri net games Discrete time Continuous time Synthesis Safety games 

Notes

Acknowledgements

The research leading to these results has received funding from the project DiCyPS funded by the Innovation Fund Denmark, the Sino Danish Research Center IDEA4CPS and the ERC Advanced Grant LASSO. The third author is partially affiliated with FI MU, Brno, Czech Republic.

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Copyright information

© Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  • Peter Gjøl Jensen
    • 1
    Email author
  • Kim Guldstrand Larsen
    • 1
  • Jiří Srba
    • 1
  1. 1.Department of Computer ScienceAalborg UniversityAalborg EastDenmark

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