session "dynamic" = "HOL" +
  options [document = false]
  theories
    List_Prefix
    My_list_prefix
    File_renaming
    Flask_type
    OS_type_def
    Flask


session "alive" = "dynamic" + 
  options [document = false]
  theories
    Valid_prop
    Init_prop
    Current_files_prop
    Current_sockets_prop
    Alive_prop
    Proc_fd_of_file_prop
    Finite_current
    New_obj_prop