Many fault localization methods have been proposed in the literature. These methods take in a set of program execution profiles and output a list of suspicious program elements. The list of program elements ranked by their suspiciousness is then presented to developers for manual inspection. Currently, the suspicious elements are ranked in a batch process where developers' inspection efforts are rarely utilized for ranking. The inaccuracy and static nature of existing fault localization methods prompt us to incorporate user feedback to improve the accuracy of the existing methods. In this paper, we propose an interactive fault localization framework that leverages simple user feedback. Our framework only needs users to label the statements examined as faulty or clean, which does not require additional effort than conventional non-interactive methods. After users label suspicious program elements as faulty or clean, our framework incorporates such information and re-orders the rest of the suspicious program elements, aiming to expose truly faulty elements earlier. We have integrated our solution with three well-known fault localization methods: Ochiai, Tarantula, and Jaccard. The evaluation on five Unix programs and the Siemens test suite shows that our solution achieves significant improvements on fault localization accuracy.
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