TEPE: a SysML language for time-constrained property modeling and formal verification

Using UML or SysML models in a verification-centric method requires a property expression language, a formal semantics, and a tool. The paper introduces TEPE, a graphical TEmporal Property Expression language based on SysML parametric diagrams. TEPE enriches the expressiveness of other common property languages in particular with the notion of physical time and unordered signal reception. TEPE is further instantiated in the AVATAR real-time UML profile. TTool, an open-source toolkit, implements a press-button approach for the formal verification of AVATAR-TEPE properties with UPPAAL. An elevator system serves as example