NDLI: A symbolic model checker for testing ASTRAL real-time specifications

Content Provider	IEEE Xplore Digital Library
Author	Zhe Dang Kemmerer, R.A.
Copyright Year	1999
Description	Author affiliation: Dept. of Comput. Sci., California Univ., Santa Barbara, CA, USA (Zhe Dang)
Abstract	ASTRAL is a high-level formal specification language for real-time (infinite state) systems. It is provided with structuring mechanisms that allow one to build modularized specifications of complex real-time systems with layering. In this paper, the methods and techniques used in the prototype implementation of the ASTRAL symbolic model checker, which is a component of the ASTRAL software development environment (SDE), are presented. The model checking procedure uses the Omega library to represent a subset of states, and model checking is carried out on the execution tree of an ASTRAL process. The tree is further trimmed by the execution graph of the process. The model checker combines both explicit state exploration and symbolic state calculation in order to reduce the number of variables needed, by dynamically resolving their values as well as their histories along a path of execution. Based upon the ASTRAL proof theory, the model checker is modularized, in the sense that each time it checks only one process instance of each process type that is globally declared. A limited window size technique is further proposed to encode the history of an imported variable when the history of the variable is referenced. The model checker is run on several earlier versions of the railroad-crossing ASTRAL specification, which contained errors, as well as on the final version, which has been proved correct. The results show that it is effective for detecting bugs in an ASTRAL specification, which is extremely important in our use of the model checker as a specification debugger. The model checker is fully automated without manual abstractions.
Starting Page	174
Ending Page	181
File Size	848437
Page Count	8
File Format	PDF
ISBN	0769503063
DOI	10.1109/RTCSA.1999.811215
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1999-12-13
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Testing History Real time systems Tree graphs Formal specifications Software prototyping Programming Software libraries Error correction Computer bugs
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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