1. DIVES Alur, Lee, Kumar, Pappas: University of Pennsylvania  Charon: high-level modeling language and a design environment reflecting the current state of the art both in formal and object oriented methods (UML)  Tools for Formal Analysis Simulation Model checking Controller synthesis Runtime monitoring  Focus on hierarchy and compositionality

2. Charon Architecture CHARON Code (High level language) Java Code Charon to Java Translator Control Code Generator Java Libraries Human Interface Analysis Simulator Code Generator Drivers Model Checker Runtime Monitor Formal Requirements

3. Language Summary  Individual components described as agents Composition, instantiation, and hiding  Individual behaviors described as modes Encapsulation, instantiation, and Scoping  Support for concurrency Shared variables as well as message passing  Support for discrete and continuous behavior Differential as well as algebraic constraints Discrete transitions can call Java routines

4. Modular Simulation x. y. z. 1.Hierarchical modes can be integrated at different time scales 2.Submodes viewed as black-boxes 3.Initial experimental results encouraging , x, inv1 ,x,y,inv2 Goal: To speed up simulation by exploiting the modular structure of specification Challenges: Robustness Scalability Accuracy