Download NASA Formal Methods: 8th International Symposium, NFM 2016, by Sanjai Rayadurgam, Oksana Tkachuk PDF

By Sanjai Rayadurgam, Oksana Tkachuk

This e-book constitutes the court cases of the eighth overseas Symposium on NASA Formal tools, NFM 2016, held in Minneapolis, MN, united states, in June 2016.
the nineteen complete and 10 brief papers provided during this quantity have been rigorously reviewed and chosen from 70 submissions. The papers have been prepared in topical sections named: necessities and architectures; checking out and run-time enforcement; theorem proving and proofs; program of formal equipment; code new release and synthesis; version checking and verification; and correctness and certification.

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Extra resources for NASA Formal Methods: 8th International Symposium, NFM 2016, Minneapolis, MN, USA, June 7-9, 2016, Proceedings

Example text

The system that is modeled has a collection of timeouts associated with the time of each “interesting event” that will occur in the system. The current value of t is assigned to the least timeout of the system greater than the previous elapsed time. Specifically, t has the following constraint: t = 0 → pre(t) + min pos(t1 − pre(t), . . , tn − pre(t)) (1) where t1 , . . , tn are variables representing the timeout values of the system. The function min pos returns the value of its minimum positive argument.

Addison-Wesley Professional, Reading (2012) 16. CESAR: The CESAR project (2010). eu/ 17. : Timed systems in SAL. Technical report, SRI International (2004) 18. : Real-time system verification by k-induction. Technical report, NASA (2005) 19. : Extending lustre with timeout automata. In: SLA++P (2007) 20. : AGREE Users Guide (2014). com/smaccm/smaccm 21. : Efficient detection of zeno runs in timed automata. S. ) FORMATS 2007. LNCS, vol. 4763, pp. 195–210. Springer, Heidelberg (2007) 22. : Contract specification language (CSL).

A description of how these proofs are constructed is provided in [12,14] and a proof sketch of correctness of these rules is described in [14,20]. For the purpose of this work, it is not important that the reader has an understanding of how these proofs are constructed. The AGREE tool translates AADL models annotated with component assumptions, guarantees, and assertions into Lustre programs. Our explanations and formalizations in this paper are described by these target Lustre specifications. Most other SMT-based model checkers use a specification language that has similar expressivity as Lustre; the techniques we present in this paper can be applied generally to other model checking specification languages.

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