NAME

       checkproof - manual page for checkproof 3.0.03-DEBUG

SYNOPSIS

       checkproof [options] [files]

DESCRIPTION

       checkproof 3.0.03-DEBUG

       Read an UPCL2 protocol and verify the inferences using one of a varity of external provers.

       This  is  a _very_ experimental program. Passing checkproof does indicate that all inferences in an UPCL2
       protocol are correct (i.e. that the conclusion is logically implied by the premisses) - that is,  if  you
       believe  that  the  transformation process and the used prover are correct. However, checkproof will e.g.
       gladly show that the empty proof protocol does not contain any buggy steps.

       If a proof protocol fails to pass this test, the proof may still  be  correct.  Due  to  e.g.  incomplete
       strategies  (this  applies  in  particular  to  Otter),  build-in  limits (Otter), and bugs in the prover
       (potentially all systems, but observed in SPASS 0.55), a prover might fail  to  verify  a  correct  step.
       Moreover,  due to the different strategies, calculi, and in particular different term orderings chosen by
       the systems, a single UPCL2 inference may result in a proof problem that is very hard to verify for other
       provers. However, if a proof step is rejected by more than one system, you should probably look  at  this
       step in detail.

       Options

       -h

       --help

              Print a short description of program usage and options.

       --version

              Print the version number of the program.

       -v

       --verbose[=<arg>]

              Verbose  comments  on  the  progress  of  the program. The short form or the long form without the
              optional argument is equivalent to --verbose=1.

       -o <arg>

       --output-file=<arg>

              Redirect output into the named file.

       -s

       --silent

              Equivalent to --output-level=0.

       -l <arg>

       --output-level=<arg>

              Select an output level, greater values imply more verbose output. At  the  moment,  level  0  only
              prints  the  result,  level  1  prints inference steps as they are verified, level 2 prints prover
              commands issued, and level 3 prints all prover output (which may be very little)

       -p <arg>

       --prover-type=<arg>

              Set the type of the prover to use for proof verification. Determines problem syntax, options,  and
              check for success. Supported options at are 'E' (the default),'Otter' 'SPASS', and 'scheme-setheo'
              (not  yet  implemented).  SPASS support is only tested with SPASS 0.55 and may fail if the problem
              contains identifiers reserved by SPASS. There have been some supple syntax changes, so more recent
              SPASS versions will probably fail as well.

       -x <arg>

       --executable=<arg>

              Give the name under which the prover can be called. If no executable  is  given,  checkproof  will
              guess a name based on the type of the prover. This guess may be way off!

       -t <arg>

       --prover-cpu-limit=<arg>

              Limit the CPU time prover may spend on a single step. Default is 10 seconds.

REPORTING BUGS

       Report bugs to <schulz@eprover.org>. Please include the following, if possible:

       * The version of the package as reported by eprover --version.

       * The operating system and version.

       * The exact command line that leads to the unexpected behaviour.

       * A description of what you expected and what actually happened.

       * If possible all input files necessary to reproduce the bug.

COPYRIGHT

       Copyright 1998-2023 by Stephan Schulz, schulz@eprover.org, and the E contributors (see DOC/CONTRIBUTORS).

       This  program  is  a part of the distribution of the equational theorem prover E. You can find the latest
       version of the E distribution as well as additional information at http://www.eprover.org

       This program is free software; you can redistribute it and/or modify  it  under  the  terms  of  the  GNU
       General  Public License as published by the Free Software Foundation; either version 2 of the License, or
       (at your option) any later version.

       This program is distributed in the hope that it will be useful, but WITHOUT ANY  WARRANTY;  without  even
       the  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
       License for more details.

       You should have received a copy of the GNU General Public License along with this program (it  should  be
       contained  in the top level directory of the distribution in the file COPYING); if not, write to the Free
       Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA

       The original copyright holder can be contacted via email or as

       Stephan Schulz DHBW Stuttgart Fakultaet Technik Informatik Lerchenstrasse 1 70174 Stuttgart Germany

checkproof 3.0.03-DEBUG                           December 2023                                    CHECKPROOF(1)