chapter AFP

session VerifyThis2018 = Sepref_IICF +
  options [timeout = 600]
  directories
    "lib"
  theories [document = false]
    "lib/VTcomp"
    "lib/DF_System"
    Snippets
  theories
    Challenge1
    Challenge1_short
    Challenge2
    Challenge3
  document_files
    "root.tex"
