Using Formal Proof and B Method at System Level for Industrial Projects

Sabatier, Denis

doi:10.1007/978-3-319-33951-1_2

Cited by 24 publications

(13 citation statements)

References 4 publications

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“…The CSSP provides a new way of practising formal methods by allowing students/engineers to connect formal models with the surrounding world. The CSSP is also used to create safety-critical systems, able to be certified at the highest safety levels 8,9,10 .…”

Section: Discussionmentioning

confidence: 99%

“…However formal methods are highly recommended just like many other non-formal (combination of) techniques, as these recommendations are setup collectively and represent the industrial best practices. Convinced that formal methods could help to obtain better products [4,5,7,8], more easily certifiable, a generic, safe execution platform has been researched for years, combining safety electronics and defect-free proven software. The software model is proved to be defect-freecomplying with its formal specification and without programming errors.…”

Section: Introductionmentioning

confidence: 99%

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Programming the CLEARSY Safety Platform with B

Lecomte¹

2020

Lecture Notes in Computer Science

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The CLEARSY Safety Platform (CSSP) is aimed at easing the development and the deployment of safety critical applications, up to the safety integrity level 4 (SIL4). It relies on the smart integration of the B formal method, redundant code generation and compilation, and a hardware platform that ensures a safe execution of the software. This paper exposes the programming model of the CSSP used to develop control & command applications based on digital I/Os.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Programming the CLEARSY Safety Platform with B

Lecomte¹

2020

Lecture Notes in Computer Science

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“…To accomplish the first task, we decided to derive a formal B model from the HL3 specification. The decision was based on diverse work (e.g., [7,[10][11][12][13][14][15]) which provided evidence that B is well suited for the railway domain. Moreover, first experiments were very promising: in a few days it was possible to model some simpler transitions of the HL3 specification.…”

Section: Requirements and Modelling Strategymentioning

confidence: 99%

“…However, we ourselves do not yet have enough understanding of HL3 specification to understand why it is safe and how a proof and refinement strategy should look like. Developing a system-level proof of HL3 specification is worthy of another research project, and can get inspiration from successful use of Event-B for similar demonstrations for the Flushing line in New York [14] or the Octys line in Paris [15].…”

Section: Comparisonmentioning

confidence: 99%

Validation and real-life demonstration of ETCS hybrid level 3 principles using a formal B model

Hansen

Leuschel

Körner

et al. 2020

Int J Softw Tools Technol Transfer

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In this article, we present a concrete realisation of the ETCS hybrid level 3 concept, whose practical viability was evaluated in a field demonstration in 2017. Hybrid level 3 introduces virtual subsections as subdivisions of classical track sections with trackside train detection. Our approach introduces an add-on for the radio block centre (RBC) of Thales, called virtual block function (VBF), which computes the occupation states of the virtual subsections using the train position reports, train integrity information, and the track occupation states. From the perspective of the RBC, the VBF behaves as an interlocking that transmits all signal aspects for virtual signals introduced for each virtual subsection to the RBC. We report on the development of the VBF, implemented as a formal B model executed at runtime using ProB and successfully used in a field demonstration to control real trains. Keywords B-method • Animation • Model-based testing • Model checking • ETCS

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“…e traditional model languages such as V [15,16], B [17], and Z [18,20] are good at modelling description, but poor at describing system concurrency. At present, the integrated specification languages are a hot topic, which produced CSPZ [21], TCOZ [22], PZN [23,24], and so on.…”

Section: Introductionmentioning

confidence: 99%

Formal Verification on the Safety of Internet of Vehicles Based on TPN and Z

Liu

Huang

Chen

2020

Mathematical Problems in Engineering

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Nowadays, the Internet of Vehicles has become the focus of global technological innovation and transformation in the automotive industry. Its flow modelling appears to play a very important role for designing and controlling the transportation systems, since it is not only necessary for improving safety and transportation efficiency but also can yield a series of society, economy, and ecosystem environment problems. Considering the characteristics of the frame structure includes states and actions and discrete and continuous aspects of traffic flow dynamics, both petri net and Z have proved to be useful tools for modelling the Internet of Vehicles. It can formally describe the vehicle behavior accurately with petri net and more details with Z frame structure. A new integration formal method of time petri net and Z is presented in this paper for modelling the vehicle behaviors and traffic rules through taking into account state dependencies on external rules. Moreover, a case study in the Internet of Vehicles is proposed to deal with the accurate localization of events. It shows that this formal verification methods significantly improves the safety and intelligence of the Internet of Vehicles.

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Using Formal Proof and B Method at System Level for Industrial Projects

Cited by 24 publications

References 4 publications

Programming the CLEARSY Safety Platform with B

Programming the CLEARSY Safety Platform with B

Validation and real-life demonstration of ETCS hybrid level 3 principles using a formal B model

Formal Verification on the Safety of Internet of Vehicles Based on TPN and Z

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