System Modeling Language (SysML) is a standardized profile of Object Management Group (OMG) and i... more System Modeling Language (SysML) is a standardized profile of Object Management Group (OMG) and it is used for the purpose of graphical modeling a system engineering application. The embedded system is graphically modeled using an internal block diagram of SysML. For formal verification of graphical model, a methodology is proposed which maps the SysML's internal block diagram to input language of PRISM model checker using CTMC (Continuous Time Markov Chain) model for developing more reliable real-time application. The functionality of the system is graphically modeled using an internal block diagram of SysML that is further translated to input language of PRISM. The user requirements are specified using CSL (Continuous Stochastic Logic) which are further verified against the functionality of the system. The timed and untimed properties are presented and verified against the CTMC model. The timed properties involve continuous time as it is critical in embedded system and its verification is necessary. We demonstrate our methodology by applying it on a case study of liquid fertilizer mixing plant and the methodology presents more accurate results.
SysML is a graphical modeling language that is mostly used for the graphical representation of re... more SysML is a graphical modeling language that is mostly used for the graphical representation of real-time systems, complex systems, safely critical systems, and embedded systems. In this paper, we present a methodology based on model checking tool for the correction and verification of SysML internal block diagram with discrete time constraint. We describe the mapping of SysML internal block diagram to PRISM input language and use Probabilistic Computational Tree Logic (PCTL) for the verification of properties. The methodology provides more reliable and quick results for the development of real time systems as PRISM supports parallel composition of components. Finally, we present the effectiveness of our approach with the help of a case study of real-time system. The discrete time factor is included in the case study to evaluate the performance characteristics of system functionality.
System Modeling Language (SysML) is a standardized profile of Object Management Group (OMG) and i... more System Modeling Language (SysML) is a standardized profile of Object Management Group (OMG) and it is used for the purpose of graphical modeling a system engineering application. The embedded system is graphically modeled using an internal block diagram of SysML. For formal verification of graphical model, a methodology is proposed which maps the SysML's internal block diagram to input language of PRISM model checker using CTMC (Continuous Time Markov Chain) model for developing more reliable real-time application. The functionality of the system is graphically modeled using an internal block diagram of SysML that is further translated to input language of PRISM. The user requirements are specified using CSL (Continuous Stochastic Logic) which are further verified against the functionality of the system. The timed and untimed properties are presented and verified against the CTMC model. The timed properties involve continuous time as it is critical in embedded system and its verification is necessary. We demonstrate our methodology by applying it on a case study of liquid fertilizer mixing plant and the methodology presents more accurate results.
SysML is a graphical modeling language that is mostly used for the graphical representation of re... more SysML is a graphical modeling language that is mostly used for the graphical representation of real-time systems, complex systems, safely critical systems, and embedded systems. In this paper, we present a methodology based on model checking tool for the correction and verification of SysML internal block diagram with discrete time constraint. We describe the mapping of SysML internal block diagram to PRISM input language and use Probabilistic Computational Tree Logic (PCTL) for the verification of properties. The methodology provides more reliable and quick results for the development of real time systems as PRISM supports parallel composition of components. Finally, we present the effectiveness of our approach with the help of a case study of real-time system. The discrete time factor is included in the case study to evaluate the performance characteristics of system functionality.
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Papers by Sajjad Ali