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Abstract In this paper, we provide a comprehensive, hands-on tutorial on how to apply deductive verification to programs written in . In particular, we show how one can use the specification language and the tool to conduct mostly-automated verification on code. In our presentation, we focus on two main classes of programs: first, purely functional programs with no mutable state; then on imperative programs, where one can mix mutable state with subtle control-flow primitives, such as locally-defined exceptions.

We present a foundationally verified implementation of a reliable communication library for asynchronous client-server communication, and a stack of formally verified components on top thereof. Our library is implemented in an OCaml-like language on top of UDP and features characteristic traits of existing protocols, such as a simple handshaking protocol, bidirectional channels, and retransmission/acknowledgement mechanisms. We verify the library in the Aneris distributed separation logic using a novel proof pattern---dubbed the session escrow pattern---based on the existing escrow proof pattern and the so-called dependent separation protocols, which hitherto have only been used in a non-distributed concurrent setting. We demonstrate how our specification of the reliable communication library simplifies formal reasoning about applications, such as a remote procedure call library, which we in turn use to verify a lazily replicated key-value store with leader-followers and clients thereof. Our development is highly modular---each component is verified relative to specifications of the components it uses (not the implementation). All our results are formalized in the Coq proof assistant.

Abstract We present , an automated deductive verification tool for OCaml. We leverage on the recently proposed GOSPEL (Generic OCaml SPEcification Language) to attach rigorous, yet readable, behavioral specification to OCaml code. The formally-specified program is fed to our toolchain, which translates it into an equivalent one in WhyML, the programming and specification language of the Why3 verification framework. We report on successful case studies conducted in .

GameAAL - Gamification Supporting Active and Assisted Living is an innovative system for monitoring elderly daily life activities and provide neurocognitive stimulation games. It is focused at filling a gap on existing Ambient Assisted Living solutions by promoting social interaction and mobility of its end-users using gamification and machine learning techniques. As long as the goals of user are being achieved, the system unlocks rewards like digital badges, providing the user with the chance of winning free admissions in cultural events provided by community partners. A Proof of Concept is ongoing with 15 real end-users who interact with a TV interface, showing a good acceptability and willing to use the system.