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This book constitutes the refereed proceedings of the 11th International Conference on Tests and Proofs, TAP 2017, held as part of STAF 2017, in Marburg, Germany, in July 2017.

The 9 full papers and 1 invited paper presented in this volume were carefully reviewed and selected from 16 submissions. The TAP conference promotes research in verification and formal methods that targets the interplay of proofs and testing: the advancement of techniques of each kind and their combination, with the ultimate goal of improving software and system dependability.

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Abstraction Refinement for the Analysis of Software Product Lines.- Hybrid Information Flow Analysis for Real-World C Code.- Symbolic Execution of Transition Systems with Function Summaries.- Unit Testing of Database-Driven Java Enterprise Edition Applications.- Model-Based Testing of Probabilistic Systems with Stochastic Time.- Test Suite Reduction in Idempotence Testing of Infrastructure as Code.- Checking UML and OCL Model Behavior with Filmstripping and Classifying Terms.- Skolem Function Continuation for Quantified Boolean Formulas.- WSCLim: A Tool for Model-Based Testing of WS-BPEL Compositions under Load Conditions.- Testing a Saturation-Based Theorem Prover: Experiences and Challenges.

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