A Fully Verified Executable LTL Model Checker


Title: A Fully Verified Executable LTL Model Checker
Authors: Javier Esparza, Peter Lammich, René Neumann (rene /dot/ neumann /at/ in /dot/ tum /dot/ de), Tobias Nipkow, Alexander Schimpf (schimpfa /at/ informatik /dot/ uni-freiburg /dot/ de) and Jan-Georg Smaus
Submission date: 2014-05-28
Abstract: We present an LTL model checker whose code has been completely verified using the Isabelle theorem prover. The checker consists of over 4000 lines of ML code. The code is produced using the Isabelle Refinement Framework, which allows us to split its correctness proof into (1) the proof of an abstract version of the checker, consisting of a few hundred lines of ``formalized pseudocode'', and (2) a verified refinement step in which mathematical sets and other abstract structures are replaced by implementations of efficient structures like red-black trees and functional arrays. This leads to a checker that, while still slower than unverified checkers, can already be used as a trusted reference implementation against which advanced implementations can be tested.

An early version of this model checker is described in the CAV 2013 paper with the same title.

  author  = {Javier Esparza and Peter Lammich and René Neumann and Tobias Nipkow and Alexander Schimpf and Jan-Georg Smaus},
  title   = {A Fully Verified Executable LTL Model Checker},
  journal = {Archive of Formal Proofs},
  month   = may,
  year    = 2014,
  note    = {\url{https://isa-afp.org/entries/CAVA_LTL_Modelchecker.html},
            Formal proof development},
  ISSN    = {2150-914x},
License: BSD License
Status: [ok] This is a development version of this entry. It might change over time and is not stable. Please refer to release versions for citations.