foster.ea:efsm:2020
ArticleInAPeriodical
2020
sep
Archive of Formal Proofs
http://www.isa-afp.org/entries/Extended_Finite_State_Machines.html, Formal proof development
FosterMichael
BruckerAchimD
TaylorRamsayG
DerrickJohn
A Formal Model of Extended Finite State Machines
In this AFP entry, we provide a formalisation of extended finite state machines (EFSMs) where models are represented as finite sets of transitions between states. EFSMs execute traces to produce observable outputs. We also define various simulation and equality metrics for EFSMs in terms of traces and prove their strengths in relation to each other. Another key contribution is a framework of function definitions such that LTL properties can be phrased over EFSMs. Finally, we provide a simple example case study in the form of a drinks machine.