A Novel Approach to Bug Localization using Call Graph Reduction Thesis submitted in partial fulfillment of the requirements for the award of degree of Master of Engineering in Software Engineering Submitted By Prabhdeep Singh 801031022 Under the supervision of: Dr. Shalini Batra Designation of Supervisors COMPUTER SCIENCE AND ENGINEERING DEPARTMENT THAPAR UNIVERSITY PATIALA – 147004 June 2012