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We leverage combined concrete and symbolic execution and several fault-localization techniques to create a uniquely powerful tool for localizing faults in PHP applications. The tool automatically generates tests that expose failures, and then automatically localizes the faults responsible for those failures, thus overcoming the limitation of previous fault-localization techniques that a test suite be available upfront. The fault-localization techniques we employ combine variations on thedoi:10.1145/1806799.1806840 dblp:conf/icse/ArtziDTP10 fatcat:rjms26jq5rbyvot6nexodhjhqa