Statecharts: A visual formalism for complex systems
Science of Computer Programming
Symbolic Model Checking
Formal System Development with KIV
FASE '00 Proceedings of the Third Internationsl Conference on Fundamental Approaches to Software Engineering: Held as Part of the European Joint Conferences on the Theory and Practice of Software, ETAPS 2000
Symbolic model checking for a discrete clocked temporal logic with intervals
Proceedings of the IFIP WG 10.5 International Conference on Correct Hardware Design and Verification Methods: Advances in Hardware Design and Verification
Modleing and Checking Networks of Communicating Real-Time Process
CHARME '99 Proceedings of the 10th IFIP WG 10.5 Advanced Research Working Conference on Correct Hardware Design and Verification Methods
Model-Based Development of Medical Devices
SAFECOMP '09 Proceedings of the 28th International Conference on Computer Safety, Reliability, and Security
Formal verification with Isabelle/HOL in practice: finding a bug in the GCC scheduler
FMICS'07 Proceedings of the 12th international conference on Formal methods for industrial critical systems
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Currently a new tunnel tube crossing the river Elbe is built in Hamburg. Therefore a new height control system is required. A computer examines the signals from light barriers and overhead sensors to detect vehicles, which try to drive into a tube with insufficient height. If necessary, it raises an alarm that blocks the road.This paper describes the application of two safety analysis techniques on this embedded system: model checking has been used to prove functional correctness with respect to a formal model. Fault tree analysis has validated the model and considered technical defects. Their combination has uncovered a safety flaw, led to a precise requirement specification for the software, and showed various ways to improve system safety.