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Component-Interaction Automata for Specification and Verification of Component Interactions

Component-Interaction Automata for Specification and Verification of Component Interactions. P. Vařeková and B. Zimmerova Masaryk University in Brno Czech Republic IFM, 2005. Content. Motivation slide 3 Specification languages 4 - 5

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Component-Interaction Automata for Specification and Verification of Component Interactions

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  1. Component-Interaction Automata for Specification and Verification of Component Interactions P. Vařeková and B. Zimmerova Masaryk University in Brno Czech Republic IFM, 2005

  2. Content • Motivation slide 3 • Specification languages 4 - 5 • Component-Interaction automata 6 - 8 • Component-Interaction automata • Composition of Component-Interaction automata • Conclusion and future work 9

  3. Motivation • Component-based software systems (CBSs) • Component interactions in CBSs • Verification of interaction properties Specification languages • Architecture description languages (ADLs) • Automata-based languages 3

  4. Specification Languages - ADLs • Wright(R. J. Allen, 1997) • Darwin / Tracta(J. Magee, J. Kramer, • D. Giannakopulou, 1999) • SOFA(F. Plasil, S. Visnovsky, 2002) • + Hierarchical component architecture • + Supported by tools • + User friendly • - Verification of a small fixed set of properties 4

  5. Specification Languages – Automata-based languages • I/O automata(N. A. Lynch, M. R. Tuttle, 1987) • Interface automata(L. de Alfaro, T. A. Henzinger, 2001) • Team automata(C. Ellis, 1997) + General and formal + Verification of temporal properties • Specification of component interactions only • Composition not parameterised by assembly 5

  6. Component-Interaction Automata (CI automata) • Automata based language • Three types of actions • input, output, internal • CCS like synchronization • one input and one output action which becomes internal later on • Flexible composition • can be parameterised by characteristics of the system • Close to architecture description languages • can be semi-automatically transformed into CI automata • Close to Buchi automata • infinite traces 6

  7. Component-Interaction Automaton • Hierarchy • States (initial states) • Labels (structured - input, output, internal) • Labelled transitions • Component: Database Client • Hierarchy • States (initial states) • Labels (structured - input, output, internal) • Labelled transitions Component: Database Client 7

  8. Component-Interaction Automaton • Hierarchy • States (initial states) • Labels (structured - input, output, internal) • Labelled transitions Component: Database Client 7

  9. Component-Interaction Automaton • Hierarchy • States (initial states) • Labels (structured - input, output, internal) • Labelled transitions Component: Database Client 7

  10. Component-Interaction Automaton • Hierarchy • States (initial states) • Labels (structured - input, output, internal) • Labelled transitions Component: Database Client 7

  11. Composition of CI automata • every finite set of • CI automata can be composed • transition set of composed CI automaton complete transition space 8 • In figures, states ijk stands for (i, j, k)

  12. Composition of CI automata • every finite set of • CI automata can be composed • transition set of composed CI automaton complete transition space 8 • In figures, states ijk stands for (i, j, k)

  13. Composition of CI automata • every finite set of • CI automata can be composed • transition set of composed CI automaton complete transition space 8 • In figures, states ijk stands for (i, j, k)

  14. Conclusion and future work • CI automata • language for specification and verification of component interactions • Current work • equivalences and relations among CI automata • temporal logic • Future work • automatic transformation from ADL to CI automata • automatic transformation from CI automata to input language of model checking tools 9

  15. Properties verification • Transition of component-interaction automaton to input language of verification tool • Specification temporal properties G((2, ins, 1)  F(1, done, 2)) • Temporal verification, model checking (Divine) true 9

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