1 / 6

A Compositional Approach for Validation of Formal Models

A Compositional Approach for Validation of Formal Models . Bojan Cukic, Dejan Desovski West Virginia University NASA OSMA SAS '04. Approach. Using test coverage measures, decompose the formal specification model.

alena
Télécharger la présentation

A Compositional Approach for Validation of Formal Models

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. A Compositional Approach for Validation of Formal Models Bojan Cukic, Dejan Desovski West Virginia University NASA OSMA SAS '04

  2. Approach • Using test coverage measures, decompose the formal specification model. • Abstract the thoroughly tested parts, use model checking on the rest of the specification. • Demonstrate that visual interfaces hide the complexity of the specification model. • Develop methodology for creation of visual interfaces. • Use them for representing the coverage metrics too. • Extend the SCR toolset • Monitoring specification test coverage. • Automatic decomposition of the specification. • Compositional verification.

  3. Importance/benefits • Verification and validation of formal models suffers from significant practical drawbacks. • Practical and automated assurance of specifications is an open research problem. • Integration of model testing and visual specification interfaces. • Facilitates variable and interaction abstraction. • Abstractions reducing the state-space of the models. • A compositional framework for verification and validation of system specification models. • Exploit the ease of testing, and the completeness of the model checking. • Extending a mature toolset (SCR).

  4. Relevance to NASA • Incomplete, inconsistent, unstable system requirements a major mission assurance problem. • Brian O’Connor’s address at NASA IV&V, June 04. • Proposed approach to be evaluated on NASA case studies. • Fault Protection Engine (FPE) System at JPL. • Other case studies wanted/needed. • Ongoing case studies on formal specification.

  5. Accomplishments • Test coverage of SCR specification constructs study completed. • Formally defined coverage criteria applicable to SCR specifications. • SCR’s simulator utilized for automated coverage tracking. • Coverage tracking tool developed, applied to Safety Injection System.

  6. Next Steps • Continue the research on SCR specification test coverage, visualization, abstraction, additional case studies. • Develop a methodology for building visual interfaces of generic SCR specifications. • Investigate visual interfaces suitable for specification verification and validation. • Integrate visualization toolset with the coverage tracking tool. • Research on automated specification abstraction from test coverage metrics.

More Related