Release 3.16 – 2023-07-07
We are pleased to announce the release of Copilot 3.16, a stream-based DSL for writing and monitoring embedded C programs, with an emphasis on correctness and hard realtime requirements. Copilot is typically used as a high-level runtime verification framework, and supports temporal logic (LTL, PTLTL and MTL), clocks and voting algorithms.
Among others, Copilot has been used at the Safety Critical Avionics Systems Branch of NASA Langley Research Center for monitoring test flights of drones.
This release introduces two important changes. The first is a battery of tests for the C99 backend. This contribution is a key component towards meeting the requirements of NASA’s Procedural Requirements for Research and Technology Software. The second is a breaking change in copilot-language: a type has moved modules.
Current emphasis is on improving the codebase in terms of stability and test coverage, removing unnecessary dependencies, hiding internal definitions, and formatting the code to meet our new coding standards. Users are encouraged to participate by opening issues and asking questions via our github repo.
Copilot is distributed under the BSD-3-Clause licence, which can be found here.
We are grateful for NASA Contract NNL08AD13T to Galois, Inc. and the National Institute of Aerospace, which partially supported this work.
Additionally NASA Langley contracts 80LARC17C0004 and NNL09AA00A supported further development of Copilot.
We would like to thank Kaveh Darafsheh (NASA Langley Research Center) for his help with testing Copilot. In addition numerous people have helped with smaller things, reporting bugs etc. Thanks to all of them!