NDLI: Efficient verification of periodic programs using sequential consistency and snapshots

Content Provider	IEEE Xplore Digital Library
Author	Chaki, S. Gurfinkel, A. Sinha, N.
Copyright Year	2014
Abstract	We verify safety properties of periodic programs, consisting of periodically activated threads scheduled preemptively based on their priorities. We develop an approach based on generating, and solving, a provably correct verification condition (VC). The VC is generated by adapting Lamport's sequential consistency to the semantics of periodic programs. Our approach is able to handle periodic programs that synchronize via two commonly used types of locks - priority ceiling protocol (PCP) locks, and CPU locks. To improve the scalability of our approach, we develop a strategy called snapshotting, which leads to VCs containing fewer redundant sub-formulas, and are therefore more easily solved by current SMT engines. We develop two types of snapshotting - SS-ALL snapshots all shared variables aggressively, while SS-MOD snapshots only modified variables. We have implemented our approach in a tool. Experiments on a benchmark of robot controllers indicate that SS-MOD is the best overall strategy, and even outperforms significantly the state-of-the art periodic program verifier prior to this work.
Starting Page	51
Ending Page	58
File Size	1275793
Page Count	8
File Format	PDF
ISBN	9780983567844
DOI	10.1109/FMCAD.2014.6987595
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-10-21
Publisher Place	Switzerland
Access Restriction	Subscribed
Rights Holder	FMCAD and the authors
Subject Keyword	Law Instruction sets Semantics Encoding Safety Clocks
Content Type	Text
Resource Type	Article

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