Actors Upgraded for Variability, Adaptability, and Determinism

The Rebeca modeling language is designed as an imperative actor-based language with the goal of providing an easy-to-use language for modeling concurrent and distributed systems, with formal verification support. Rebeca has been extended to support time and probability. We extend Rebeca further with inheritance, polymorphism, interface declaration, and annotation mechanisms. These features allow us to handle variability within the model, support non-disruptive model evolution, and define method priorities. This enables Rebeca to be used more effectively in different domains, like in Software Product Lines, and holistic analysis of Cyber-Physical Systems. We develop specialized analysis techniques to support these extensions, partly integrated into Afra, the model checking tool of Rebeca.