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Verification Case Studies with ObjectCheck: Insights from Microsoft Research

This presentation showcases the architecture and capabilities of ObjectCheck, an integrated development, validation, and model-checking environment designed for software system designs. It covers the modeling and verification of a TinyOS run-time image, highlighting case studies and future work. Key features include xUML, an executable subset of UML, used for software/hardware co-design and model checking. The presentation discusses verification of properties in various case studies, including a NASA robot controller and an online ticket sale system, emphasizing the effectiveness of ObjectCheck in real-world applications.

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Verification Case Studies with ObjectCheck: Insights from Microsoft Research

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  1. Presentation at Microsoft Research, April 10, 2003 Verification Case Studies with ObjectCheck Fei Xie (Joint work with James C. Browne, Robert P. Kurshan, and Vladimir Levin)

  2. Presentation Outline • Overview and Architecture of ObjectCheck • Modeling and Verification of a TinyOS Run-time Image with ObjectCheck • More Case Studies • Summary and Future Work • Work Built on ObjectCheck

  3. ObjectCheck Overview • An integrated development, validation, and mode-checking environment for software system designs; • System designs are specified in xUML; • xUML is an executable subset of UML; • Developed in conjunction with • FormalCheck (Robert P. Kurshan, et. al.); • SDLCheck (Vladimir Levin and Husnu Yenigun); • Goal: Software/hardware co-design and co-verification; • Sub-goal: Model checking of software system designs in xUML.

  4. Executable UML (xUML) • Has well-defined Execution Semantics; • Utilizes UML Action Semantics recently adopted by OMG; • Can be compiled to procedural codes; • Tools provided by: • Project Technologies; • Kennedy Carter; • Hyperformix (SES); • …

  5. Designer Property xUML Model Error Report S/R Query S/R Model Error Track Architecture and Workflow of ObjectCheck Property Specification Interface xUML IDE Error Visualizer xUML-to-S/R Translator Error Report Generator COSPAN Model Checker

  6. Presentation Outline • Overview and Architecture of ObjectCheck • Modeling and Verification of a TinyOS Run-time Image with ObjectCheck • More Case Studies • Summary and Future Work • Work Built on ObjectCheck

  7. Case Study on TinyOS • A run-time image of TinyOS, a component-based operating system for networked sensors; • xUML models for TinyOS components have been constructed from their C source codes to enable: • Model-driven development on design level; • Software/hardware co-design and co-verification; • Two properties are to be checked: • Repeated transmission on physical network; • No consecutive 0’s in any sequence-number sequence.

  8. More on TinyOS • An OS for networked sensors that have • Limited computation ability and energy supply; • High concurrency requirements; • Diversities in designs and usages; • High reliability requirement; • Is component-based • Run-time images are specialized for different sensors; • Only necessary components are selected and composed. • More information -- http://webs.cs.berkeley.edu/tos

  9. Step-by-Step Demonstration Designer Property Specification Interface xUML IDE Error Visualizer Property xUML Model Error Report xUML-to-S/R Translator Error Report Generator S/R Query S/R Model Error Track COSPAN Model Checker

  10. Step-by-Step Demonstration Designer Property Specification Interface xUML IDE Error Visualizer Property xUML Model Error Report xUML-to-S/R Translator Error Report Generator S/R Query S/R Model Error Track COSPAN Model Checker

  11. Step-by-Step Demonstration Designer Property Specification Interface xUML IDE Error Visualizer Property xUML Model Error Report xUML-to-S/R Translator Error Report Generator S/R Query S/R Model Error Track COSPAN Model Checker

  12. Step-by-Step Demonstration Designer Property Specification Interface xUML IDE Error Visualizer Property xUML Model Error Report xUML-to-S/R Translator Error Report Generator S/R Query S/R Model Error Track COSPAN Model Checker

  13. Step-by-Step Demonstration Designer Property Specification Interface xUML IDE Error Visualizer Property xUML Model Error Report xUML-to-S/R Translator Error Report Generator S/R Query S/R Model Error Track COSPAN Model Checker

  14. Step-by-Step Demonstration Designer Property Specification Interface xUML IDE Error Visualizer Property xUML Model Error Report xUML-to-S/R Translator Error Report Generator S/R Query S/R Model Error Track COSPAN Model Checker

  15. Statistics from Model Checking “Repeated Output” Property • Four model checking runs with different combinations of reduction algorithms • Start at the same time on the same host; • The host is a SUN with 8 CPUs and 2GB memory. Conclusion: SMC helps and SPOR doesn’t.

  16. Presentation Outline • Overview and Architecture of ObjectCheck • Modeling and Verification of a TinyOS Run-time Image with ObjectCheck • More Case Studies • Summary and Future Work • Work Built on ObjectCheck

  17. Model Checking of NASA robot Controller • A typical control-intensive embedded system; • Conducted by Natasha Shyrigina using ObjectCheck; • 37 properties were checked. • 22 properties were successfully checked. • 6 bugs were found.

  18. NASA Robot Controller

  19. Properties to be Model checked

  20. Model Checking of Online Ticket Sale System • A typical commercial transaction system; • Presented at FASE 2002; • Focus: Integrated state space reduction.

  21. An Online Ticket Sale System (Class Diagram)

  22. An Online Ticket Sale System (A State Model)

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