Specification and Verification of a Safety Shell with Statecharts and Extended Timed Graphs
SAFECOMP '00 Proceedings of the 19th International Conference on Computer Safety, Reliability and Security
Synchronous Modeling and Validation of Priority Inheritance Schedulers
FASE '09 Proceedings of the 12th International Conference on Fundamental Approaches to Software Engineering: Held as Part of the Joint European Conferences on Theory and Practice of Software, ETAPS 2009
On the formal verification of systems of synchronous software components
SAFECOMP'12 Proceedings of the 31st international conference on Computer Safety, Reliability, and Security
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Basically, aircraft engines can be divided into a control embedded system and a controlled system with its environment. The behaviour of the controlled system is given a priori, while the control system still needs to be designed in a way guaranteeing the correct overall behaviour under all operational conditions depending on the flight domain. A large quantity of functions in control systems can be described by a formal system expressed in block diagrams and state-based representations. These representations can be translated to formal based tools relying on the synchronous languages Signal and Statecharts. SACRES is a tool set supporting the design of safety-critical embedded control systems. It integrates the tools and specification techniques Statemate, Sildex, and Timing Diagrams with tool components for automatic code generation, formal verification based on model checking techniques, and an innovative approach for automatic code validation for target code generated from DC+. Technical achievements are - Integration of dataflow and state-based specification styles - Formal specification of safety-critical properties - Integration of efficient symbolic model checking techniques with Statemate and Sildex - Automatic generation of efficient distributed code - Automated correctness proofs for the generated code The main benefits of the SACRES approach are reduced risks for design errors and decreased design times and costs for the development of dependable (safety critical) embedded systems. SACRES is an attempt to avoid unpredictability (particularly that arising from late feedback from testing) associated with development of safety critical systems, through the use of the maximum degree of automation, especially in respect of code generation and verification.