Programming Behavioral Test Models for SMT Solving in Scala

We present a novel approach for modeling cyber-physical systems for analysis and test purposes. Instead of creating a new expressive specification language with sophisticated semantics and complex compilers, we rely on a lightweight version of Back's Action Systems, for which we provide a simple bounded model checker using the SMT solver Z3. In order to model industrial-sized embedded systems, we extend our simple specification language by using the powerful capa-bilities of the modern programming language Scala for creating Domain Specific Languages (DSL). This enables us to use the features of an expressive, object-oriented and functional generalpurpose language without the need to increase the complexity of the model checker. We demonstrate how to model a railway interlocking system with a configurable track layout and sketch the application to model-based testing.