session "Hoare_gen" = "HOL" +
  options [document = pdf]
  theories [document = false]
     Hoare_gen
session "Hoare_tm_basis" = "Hoare_gen" +
  options [document = pdf]
  theories [document = false, document_output = "output_tm", document_variants = "hoare_tm"]
     Hoare_tm_basis
  files
    "document/root_tm.tex"
session "Hoare_tm" = "Hoare_tm_basis" +
  options [document = pdf]
  theories [document = false, document_output = "output_tm", document_variants = "hoare_tm"]
     Hoare_tm
  files
    "document/root_tm.tex"
session "Hoare_abc" = "Hoare_tm" +
  options [document = pdf]
  theories [document = false, document_output = "./output_abc"]
     Hoare_abc