NDLI: A trajectory splicing approach to concretizing counterexamples for hybrid systems

Content Provider	IEEE Xplore Digital Library
Author	Zutshi, A. Sankaranarayanan, S. Deshmukh, J.V. Kapinski, J.
Copyright Year	2013
Description	Author affiliation: Fac. of Comput. Sci., Univ. of Colorado, Boulder, CO, USA (Sankaranarayanan, S.) \|\| Dept. of Electr., Univ. of Colorado, Boulder, CO, USA (Zutshi, A.) \|\| Toyota Tech. Center, CA, USA (Deshmukh, J.V.; Kapinski, J.)
Abstract	This paper examines techniques for finding falsifying trajectories of hybrid systems using an approach that we call trajectory splicing. Many formal verification techniques for hybrid systems, including flowpipe construction, can identify plausible abstract counterexamples for property violations. However, there is often a gap between the reported abstract counterexamples and the concrete system trajectories. Our approach starts with a candidate sequence of disconnected trajectory segments, each segment lying inside a discrete mode. However, such disconnected segments do not form concrete violations due to the gaps that exist between the ending state of one segment and the starting state of the subsequent segment. Therefore, trajectory splicing uses local optimization to minimize the gap between these segments, effectively splicing them together to form a concrete trajectory. We demonstrate the use of our approach for falsifying safety properties of hybrid systems using standard optimization techniques. As such, our approach is not restricted to linear systems. We compare our approach with other falsification approaches including uniform random sampling and a robustness guided falsification approach used in the tool S-Taliro. Our preliminary evaluation clearly shows the potential of our approach to search for candidate trajectory segments and use them to find concrete property violations.
Sponsorship	IEEE Control Syst. Soc.
Starting Page	3918
Ending Page	3925
File Size	607684
Page Count	8
File Format	PDF
ISBN	9781467357142
ISSN	07431546
e-ISBN	9781467357173
DOI	10.1109/CDC.2013.6760488
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-12-10
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Trajectory Optimization Concrete Automata Robustness Splicing Safety
Content Type	Text
Resource Type	Article
Subject	Control and Optimization Control and Systems Engineering Modeling and Simulation

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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