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Author: Thomas Göthel
Publisher: Sudwestdeutscher Verlag Fur Hochschulschriften AG
ISBN: 9783838134604
Category :
Languages : en
Pages : 240
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Book Description
Real-time systems, such as real-time operating systems, often have to be able to cope with an unbounded number of similar components. These systems fall in the class of parameterized systems. Especially in safety-critical areas, formal verification ensures that they behave correctly in all cases. However, the machine-assisted verification of parameterized real-time systems is hard because automatic verification techniques (such as model checking) can be employed directly only for finite instances of a system and are thus incomplete. To overcome this problem, we provide a framework for the mechanical, comprehensive, and semi-automatic verification of parameterized real-time systems. At its core, we employ the process calculus Timed CSP. We provide an interactive theorem proving environment enhanced with debugging capabilities using automatic verification techniques. Thus, finite instances can be checked and debugged with automatic tool support. Then, given the evidence that the overall parameterized real-time system behaves correctly, our theorem proving environment facilitates its semi-automatic, comprehensive verification.
Author: Thomas Göthel
Publisher: Sudwestdeutscher Verlag Fur Hochschulschriften AG
ISBN: 9783838134604
Category :
Languages : en
Pages : 240
Get Book Here
Book Description
Real-time systems, such as real-time operating systems, often have to be able to cope with an unbounded number of similar components. These systems fall in the class of parameterized systems. Especially in safety-critical areas, formal verification ensures that they behave correctly in all cases. However, the machine-assisted verification of parameterized real-time systems is hard because automatic verification techniques (such as model checking) can be employed directly only for finite instances of a system and are thus incomplete. To overcome this problem, we provide a framework for the mechanical, comprehensive, and semi-automatic verification of parameterized real-time systems. At its core, we employ the process calculus Timed CSP. We provide an interactive theorem proving environment enhanced with debugging capabilities using automatic verification techniques. Thus, finite instances can be checked and debugged with automatic tool support. Then, given the evidence that the overall parameterized real-time system behaves correctly, our theorem proving environment facilitates its semi-automatic, comprehensive verification.
Author: Etienne André
Publisher: John Wiley & Sons
ISBN: 1118569784
Category : Technology & Engineering
Languages : en
Pages : 170
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Book Description
This book introduces state-of-the-art verification techniques for real-time embedded systems, based on the inverse method for parametric timed automata. It reviews popular formalisms for the specification and verification of timed concurrent systems and, in particular, timed automata as well as several extensions such as timed automata equipped with stopwatches, linear hybrid automata and affine hybrid automata. The inverse method is introduced, and its benefits for guaranteeing robustness in real-time systems are shown. Then, it is shown how an iteration of the inverse method can solve the good parameters problem for parametric timed automata by computing a behavioral cartography of the system. Different extensions are proposed particularly for hybrid systems and applications to scheduling problems using timed automata with stopwatches. Various examples, both from the literature and industry, illustrate the techniques throughout the book. Various parametric verifications are performed, in particular of abstractions of a memory circuit sold by the chipset manufacturer ST-Microelectronics, as well as of the prospective flight control system of the next generation of spacecraft designed by ASTRIUM Space Transportation. Contents: 1. Parametric Timed Automata. 2. The Inverse Method for Parametric Timed Automata. 3. The Inverse Method in Practice: Application to Case Studies. 4. Behavioral Cartography of Timed Automata. 5. Parameter Synthesis for Hybrid Automata. 6. Application to the Robustness Analysis of Scheduling Problems. 7. Conclusion and Perspectives. About the Authors Étienne André is Associate Professor in the Laboratoire d’Informatique de Paris Nord, in the University of Paris 13 (Sorbonne Paris Cité) in France. His current research interests focus on the verification of real-time systems. Romain Soulat is currently completing his PhD at the LSV laboratory at ENS-Cachan in France, focusing on the modeling and verification of hybrid temporal systems.
Author: Joel Ouaknine
Publisher: Springer
ISBN: 3642043682
Category : Computers
Languages : en
Pages : 301
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Book Description
This book constitutes the refereed proceedings of the 7th International Conference on Formal Modeling and Analysis of Timed Systems, FORMATS 2009, held in Budapest, Hungary, September 2009. The 18 revised full papers presented together with 4 invited talks were carefully reviewed and selected from 40 submissions. The aim of FORMATS is to promote the study of fundamental and practical aspects of timed systems, and to bring together researchers from different disciplines that share interests in the modelling and analysis of timed systems.Typical topics include (but are not limited to): – Foundations and Semantics. Theoretical foundations of timed systems and languages; comparison between different models (timed automata, timed Petri nets, hybrid automata, timed process algebra, max-plus algebra, probabilistic models). – Methods and Tools. Techniques, algorithms, data structures, and software tools for analyzing timed systems and resolving temporal constraints (scheduling, worst-case execution time analysis, optimization, model checking, testing, constraint solving, etc.). – Applications. Adaptation and specialization of timing technology in application domains in which timing plays an important role (real-time software, hardware circuits, and problems of scheduling in manufacturing and telecommunication).
Author: Holger Hermanns
Publisher: Springer
ISBN: 3540330577
Category : Computers
Languages : en
Pages : 519
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Book Description
This book constitutes the refereed proceedings of the 12th International Conference on Tools and Algorithms for the Construction and Analysis of Systems, TACAS 2005, held Austria in March/April 2006 as part of ETAPS. The 30 revised full research papers and four revised tool demonstration papers presented together with one invited paper were carefully reviewed and selected from a total of 118 submissions. The papers are organized in topical sections.
Author: Nicolas Navet
Publisher: John Wiley & Sons
ISBN: 1118623959
Category : Science
Languages : en
Pages : 283
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Book Description
This title is devoted to presenting some of the most important concepts and techniques for describing real-time systems and analyzing their behavior in order to enable the designer to achieve guarantees of temporal correctness. Topics addressed include mathematical models of real-time systems and associated formal verification techniques such as model checking, probabilistic modeling and verification, programming and description languages, and validation approaches based on testing. With contributions from authors who are experts in their respective fields, this will provide the reader with the state of the art in formal verification of real-time systems and an overview of available software tools.
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 30
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Book Description
Author: Nikolaj Bjorner
Publisher:
ISBN:
Category : Automatic theorem proving
Languages : en
Pages : 39
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Book Description
Abstract: "We present a modular framework for proving temporal properties of real-time systems, based on clocked transition systems and linear-time temporal logic. We show how deductive verification rules, verification diagrams, and automatic invariant generation can be used to establish properties of real-time systems in this framework. We also discuss global and modular proofs of the branching-time property of non-Zenoness. As an example, we present the mechanical verification of the generalized railroad crossing case study using the Stanford Temporal Prover, STeP."
Author:
Publisher:
ISBN:
Category : Computer software
Languages : en
Pages : 620
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Book Description
Author: David J. Murray-Smith
Publisher: Springer
ISBN: 3319150995
Category : Computers
Languages : en
Pages : 258
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Book Description
This must-read text/reference provides a practical guide to processes involved in the development and application of dynamic simulation models, covering a wide range of issues relating to testing, verification and validation. Illustrative example problems in continuous system simulation are presented throughout the book, supported by extended case studies from a number of interdisciplinary applications. Topics and features: provides an emphasis on practical issues of model quality and validation, along with questions concerning the management of simulation models, the use of model libraries, and generic models; contains numerous step-by-step examples; presents detailed case studies, often with accompanying datasets; includes discussion of hybrid models, which involve a combination of continuous system and discrete-event descriptions; examines experimental modeling approaches that involve system identification and parameter estimation; offers supplementary material at an associated website.
Author: Hoang Gia Nguyen
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Critical real-time systems are becoming ubiquitous and are playing a vital role in our world. To provide guarantees that the system is behaving correctly, the correctness of these systems need to be verified before running. Besides functional checking, the timed behavior checking is also crucial. Indeed, the correctness of the systems also depends on the timing values or delays of internal operations that can be affected by the environment. Verification techniques assure that software or hardware systems fully satisfy all their expected requirements. Most formal verification methods for timed systems guarantee the correctness of a timed system for the predefined timing values in its blueprint, but not for other undefined timing values which might occur by the environment change and lead to undesired system behaviors. Unfortunately, verifying such system for various timing values can be an obstacle and time-consuming. Therefore, by abstracting these specific timing values with parameters, many timing values of a system can be easily synthesized and checked at the same time : this technique is also known as parameter synthesis. As a huge challenge for the verification, parameter synthesis techniques also suffer from the “state space explosion” problem, which is the explosion of the number of possible states while verifying a system formally. Firstofall, we are interested in taking advantage of the capabilities of current distributed architectures, and parameter synthesis algorithms should be redefined and adapted to the distributed case. We propose in the thesis several distribution schemes that can accelerate our parameter synthesis procedures. We also focus on studying the techniques such as symbolic verification, zone subsumption, etc. and how they affect the state space explosion problem. Then we introduce several smart state exploration techniques with some heuristics, in order to reduce the state space explosion. These techniques and heuristics are integrated into our new synthesis algorithms, and one of these algorithms is also extended in a distributed manner which gives an impressive performance in our benchmarks. Furthermore, to achieve a reliable result we present an approach for detecting timed systems doing an infinite amount of actions in a finite time, which is known as the Zeno phenomenon in theory. In reality, it is infeasible and such counterexamples should always be avoided. Additionally, to detect the non-Zeno phenomenon on a large scale network model, we also distribute our approach on clusters. In the end, we introduce an algorithm to detect non-Zeno runs and its distributed version of it for large-scale models. At the time of writing this thesis, this is also the first work on non-Zeno parameter synthesis.
