Detecting State Encoding Conflicts in STG Unfoldings Using SAT

The behaviour of asynchronous circuits is often described by Signal Transition Graphs (STGs), which are Petri nets whose transitions are interpreted as rising and falling edges of signals. One of the crucial problems in the synthesis of such circuits is that of identifying whether an STG satisfies the Complete State Coding (CSC) requirement (which states that semantically different reachable states must have different binary encodings), and, if …