Correctness of a system depends on the correct execution of transactions. For large systems, e.g., web-based, these transactions involve more than one component and hence more than one independent entity. Such transactions are called Long Running Transaction(LRT) as they coordinate complex interactions among multiple sub-systems. Well known roll-back mechanism do not suffice to handle faults in LRTs, therefore compensation mechanisms are introduced. However, introduced structures are complex and hard to understand and handle. Formal methods are well known tool for modelling, analysis and synthesis of complex systems. In this chapter we present a technique that allows modelling LRTs using Compensating CSP, then translating them to Promela language and analyzing using SPIN tool. We have modelled and verified the LRTs. We exemplify it using a web service called Air-ticket Reservation System (ATRS). © 2013 by World Scientific Publishing Co. Pte. Ltd. All rights reserved.

Shirshendu Das

Department of Computer Science and Engineering

S. Chakraborty

H.K. Kapoor

K.L. Man

Indian Institute of Technology Hyderabad (IITH) is a premier institute of science and technology established in 2008. IITH has been consistently ranked in the&nbsp;<a href="https://iith.ac.in/reports/" rel="noopener noreferrer">top 10 institutes</a>&nbsp;in India for Engineering&nbsp;<a href="https://www.nirfindia.org/2021/EngineeringRanking.html" rel="noopener noreferrer" target="_blank">according to NIRF</a>&nbsp;making it one of the most coveted schools for science and technology in the country.

IITH offers&nbsp;<a href="https://iith.ac.in/academics/under-graduate/">undergraduate programs</a>&nbsp;in all the classical engineering disciplines, applied sciences, design, as well as several modern interdisciplinary areas. Students are given a flexibility to explore a broad set of areas, and potentially pursue a minor or double major in a discipline that is not their own. Students who wish to seek a deeper understanding of their own discipline are strongly encouraged to get involved in cutting-edge research with the help of a faculty to mentor them, and earn an Honors in their own field.

The very foundation of IIT Hyderabad is based on&nbsp;<a href="https://iith.ac.in/research/">research and innovation</a>. The vibrant research culture is evident from the number of patents and publications that IITH produces consistently every year. IITH offers&nbsp;<a href="https://iith.ac.in/academics/programmes-offered/">graduate programs</a>&nbsp;at both a masters, and a doctoral level, in several diverse areas. There are separate programs for technology, design, science, and liberal arts. The&nbsp;<a href="https://iith.ac.in/academics/post-graduate/">MTech program</a>&nbsp;is offered in various modes and durations to cater to the ever-growing need of postgraduate level professionals in the country.

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IITH enjoys a very special relationship with Japanese universities and industries that goes beyond academic and research collaborations. In fact, some of the iconic buildings in IITH campus will carry the signature of Japanese architecture.

IITH creates a unique holistic ecosystem for education that offers interactive learning, a very flexible academic structure, cutting-edge research, strong industry collaboration, and entrepreneurship. This is an environment which enables students and faculty to translate their dreams into realities.

Journal	IAENG Transactions on Electrical Engineering Volume 1: Special Issue of the International Multiconference of Engineers and Computer Scientists 2012
Publisher	World Scientific Publishing Co.