By Cesare Tinelli (auth.), Alwyn E. Goodloe, Suzette Person (eds.)

This ebook constitutes the refereed lawsuits of the Fourth overseas Symposium on NASA Formal tools, NFM 2012, held in Norfolk, VA, united states, in April 2012. The 36 revised usual papers offered including 10 brief papers, three invited talks have been rigorously reviewed and chosen from ninety three submissions. the themes are equipped in topical sections on theorem proving, symbolic execution, model-based engineering, real-time and stochastic platforms, version checking, abstraction and abstraction refinement, compositional verification thoughts, static and dynamic research strategies, fault defense, cyber protection, specification formalisms, necessities research and functions of formal techniques.

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Additional resources for NASA Formal Methods: 4th International Symposium, NFM 2012, Norfolk, VA, USA, April 3-5, 2012. Proceedings

Sample text

Traceability is a relevant issue in the development of safety-critical systems, since any error has to be traced back to the process task, or artefact defect, that produced it. The formal development approach introduced, with the support of RTW Embedded Coder, Adoption of MDB 35 has allowed defining navigable links between the single code statements and the requirements. Control. The structured development has given greater control over the components, producing in the end software with less bugs already before the verification activities, as witnessed by the bug reduction evaluation measured during Project 3 (from 10 to 3 bugs per module) [17].

Goodloe and S. ): NFM 2012, LNCS 7226, pp. 24–38, 2012. c Springer-Verlag Berlin Heidelberg 2012 Adoption of MDB 25 Within this context, recent years have seen the diffusion of graphical tools to facilitate the development of the software before its actual deployment. Technologies known as model-based design [32] and code generation started to be progressively adopted by several companies as part of their software process. , RTCA/DO-178B [30] for aerospace, IEC-61508 [22] for automotive and CENELEC/EN-50128 [7] for railway signalling in Europe).

IEEE (2009) 5. : Ten commandments of formal methods. IEEE Computer 28(4), 56–63 (1995) 6. ten years later. IEEE Computer 39(1), 40–48 (2006) 7. CENELEC. EN 50128, Railway applications - Communications, signalling and processing systems - Software for railway control and protection systems (2011) 8. : Testing-based translation validation of generated code in the context of IEC 61508. Formal Methods in System Design 35(3), 389–401 (2009) 9. : Abstract interpretation: A unified lattice model for static analysis of programs by construction or approximation of fixpoints.

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