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Formal Analysis and Verication of Self-Healing Systems: Long Version

Ehrig, Hartmut; Ermel, Claudia; Runge, Olga; Bucchiarone, Antonio; Pelliccione, Patrizio

Forschungsberichte der Fakultät IV - Elektrotechnik und Informatik / Technische Universität Berlin

Self-healing (SH-)systems are characterized by an automatic discovery of system failures, and techniques how to recover from these situations. In this paper, we show how to model SH-systems using algebraic graph transformation. These systems are modeled as typed graph grammars enriched with graph constraints. This allows not only for formal modeling of consistency and operational properties, but also for their analysis and verification using the tool AGG. We present sufficient static conditions for self-healing properties, deadlock-freeness and liveness of SH-systems. The overall approach is applied to a traffic light system case study, where the corresponding properties are verified.