1. SDRL University of Pennsylvania 2/27/2002 CHARON toolkit overview DIVES Team University of Pennsylvania

2. SDRL University of Pennsylvania 2/27/2002 Outline Step-by-step construction and analysis of a model –Starting a project –Writing a model –Simulation and analysis Overview of the V2V model

3. SDRL University of Pennsylvania 2/27/2002 Starting a project Select New Project from the File menu Enter a name for the project directory –Directory thermostat –File thermostat.prj Write the model in the editor, save in the project directory Use Add Files from the Project menu to incorporate the model into the project Use Build Model from the Project menu

4. SDRL University of Pennsylvania 2/27/2002 Simple model: thermostat Single agent (no concurrency) Three modes Two continuous variables Parameters: low, high, ε heatcool check d(temp) = 2d(temp) = -temp d(temp) = -temp/2 d(clock) = 1 initial values: temp = 5.5 clock = 0 temp ≥ high-ε temp ≤ low+ε clock ≥ 2 clock:=0 clock ≤ 0.5 clock:=0 temp≤high & clock ≤3temp≥low clock ≤1

5. SDRL University of Pennsylvania 2/27/2002 Model analysis Simulation –Generate simulator ( Simulate menu) –Configure simulation display (optional) –Start simulation Reachability analysis –Convert to flat model ( Check>Reachability>Convert menu) –Add initial region, “bad” region, and predicates –Start the reachability tool