Correct-by-construction asynchronous implementation of modular synchronous specifications

We introduce a model for the representation of asynchronous implementations of synchronous specifications. The model covers classical implementations, where a notion of global synchronization is preserved by means of signaling, and globally asynchronous, locally synchronous (GALS) implementations where the global clock is removed. Our model offers a unified framework for reasoning about two essential correctness properties of an implementation: the preservation of semantics and the absence of deadlocks.