Dear all, I would like to inform you that the following paper Concolic Execution for WebAssembly Filipe Marques, José Fragoso Santos, Nuno Santos, and Pedro Adão will be published in the conference (core-A ranking) ECOOP2022, Mon 6 - Fri 10 June 2022 Berlin, Germany https://2022.ecoop.org/ and will acknowledge SPARTA. I will make the paper available as soon as we have the camera ready version. Attach the current draft. Best regards, Pedro Abstract: WebAssembly (Wasm) is a new binary instruction format that allows targeted compiled code written in high-level languages to be executed by the browser's JavaScript engine with near-native speed. Despite its clear performance advantages, Wasm opens up the opportunity for bugs or security vulnerabilities to be introduced into Web programs, as pre-existing issues in programs written in unsafe languages can be transferred down to cross-compiled binaries. The source code of such binaries is frequently unavailable for static analysis, creating the demand for tools that can directly tackle Wasm code. Despite this potentially security-critical situation, there is still a noticeable lack of tool support for analysing Wasm binaries. We present WASP, a symbolic execution engine for testing Wasm modules, which works directly on Wasm code and was built on top of a standard-compliant Wasm reference implementation. WASP was thoroughly evaluated: it was used to symbolically test a generic data-structure library for C and the Amazon Encryption SDK for C, demonstrating that it can find bugs and generate high-coverage testing inputs for real-world C applications; and was further tested against the Test-Comp benchmark, obtaining results comparable to well-established symbolic execution and testing tools for C, such as KLEE and VeriFuzz.