ZENON

Zenon is a first-order automated theorem prover based on the tableau method. It is used in the FoCaLiZe project.

COPYRIGHT

Under the new BSD License (see the file LICENSE for details)

INSTALLATION

DEPENDENCIES

This depends on:

• OCaml >= 4.02.1
• ZArith >= 1.3
• Coq >= 8.0
• Graphviz (optional)

COMPILATION

In order to compile, use :

./configure
make

This should make available to you the zenon executable in the root directory. If you want to install the binary, then issue the following command:

make install

USAGE

TPTP LIBRARY

In order to use zenon on problems from the tptp problem library, be suze to use the -itptp option in order to set the corret input parser. A standard use of zenon would then look like this:

./zenon -itptp -max-time 60s -max-size 1G /path/to/tptp/problem.p

ARITHMETIC

In order to activate the arithmetic extension of zenon, you have to use the -x arith option. You should also use the -k option, in order to activate the arithmetic instantiation search. A usual use of zenon on an arithemtic problem would look like:

./zenon -itptp -max-time 60s -max-size 1G \
      -k -x arith $TPTP/Problems/ARI/ARI001\=1.p

COQ PROOFS

In order to output checkable coq proofs, you have to use the -ocoq option. Additionally, you should use the -context and -opt0 option. A complete execution of zenon and checking of the proof by the coq compiler afterwards would look like the following, assuming that your current working directory is the zenon root directory.

./zenon -itptp -max-time 5s -max-size 1G -k -x arith \
      -ocoq -context -opt0 $TPTP/Problems/ARI/ARI001\=1.p > temp.v
coqc -I ./ temp.v

If no erros are produced, and the coqc command has return code 0, it means everything went well and the proof has been accepted by the coq compiler.

MISC

VERSION NUMBER

The version number starts from scratch fro this extension, but this extension will be merged into the main branch of Zenon sooner or later.

LINEAR ARITHMETIC BENCHMARKS

In the source directory, you will find a file linear_ari_tptp.list, which contains a list of linear problems of the ARI section of the tptp library. These problems only involve linear arithmetic, and do not use the $to_int, $to_rat, $to_real, $is_int or $is_rat functions and predicates. This is the list of files used to benchmark the arithmetic extension of zenon against the princess and beagle automated provers.

CONTACT

Guillaume Bury [email protected]

Mohamed Yacine EL HADDADD [email protected]