  Frama-C is a software analysis framework that provides a common
infrastructure and a common behavioral specification language to plugins that
implement various static and dynamic analyses of C programs. Most plugins do
not support concurrency. We have proposed Conc2Seq, a Frama-C plugin based on
program transformation, capable to leverage the existing huge code base of
plugins and to handle concurrent C programs.
  In this paper we formalize and sketch the proof of correctness of the program
transformation principle behind Conc2Seq, and present an effort towards the
full mechanization of both the formalization and proofs with the proof
assistant Coq.
