# zenon - Man Page

Automated theorem prover for first-order classical logic

## Synopsis

**zenon** [Options] *FILE*

## Description

Zenon is an automated theorem prover for first order classical logic with equality, based on the tableau method. Zenon can read input files in TPTP, Coq, Focal, and its own Zenon format. Zenon can directly generate Coq proofs (proof scripts or proof terms), which can be reinserted into Coq specifications. Zenon can also be extended.

## Options

If file is "-", it will read input from stdin.

- -context
provide context for checking the proof independently

- -d
debug mode

- -errmsg
*<message>* prefix warnings and errors with

*<message>*- -help, --help
print this option list and exit

- -I
*<dir>* add

*<dir>*to the include path (for TPTP input format)- -icoq
read input file in Coq format

- -ifocal
read input file in Focal format

- -itptp
read input file in TPTP format

- -iz
read input file in Zenon format (default)

- -loadpath
path to Zenon's coq libraries (default /usr/share/zenon)

- -max
*<s>[kMGT]/<i>[kMGT]/<t>[smhd]* set size, step, and time limits

- -max-size
*<s>[kMGT]* limit heap size to <s> kilo/mega/giga/tera word (default 100M)

- -max-step
*<i>[kMGT]* limit number of steps to <s> kilo/mega/giga/tera (default 10k)

- -max-time
*<t>[smhd]* limit CPU time to <t> second/minute/hour/day (default 5m)

- -ocoq
print the proof in Coq script format

- -ocoqterm
print the proof in Coq term format

- -oh
<n> print the proof in high-level format up to depth <n>

- -ol
print the proof in low-level format

- -olx
print the proof in raw low-level format

- -om
print the proof in middle-level format

- -onone
do not print the proof (default)

- -opt0
do not optimise the proof

- -opt1
do peephole optimisation of the proof (default)

- -p0
turn off progress bar and progress messages

- -p1
display progress bar (default)

- -p2
display progress messages

- -q
(quiet) suppress proof-found/no-proof/begin-proof/end-proof

- -rename
prefix all input symbols to avoid clashes

- -rnd
*<seed>* randomize proof search

- -stats
print statistics

- -short
output a less detailed proof

- -v
print version string and exit

- -versions
print CVS version strings and exit

- -w
suppress warnings

- -where
print the location of the zenon library and exit

- -wout
*<file>* output errors and warnings to

*<file>*instead of stderr- -x
*<ext>* activate extension

*<ext>*

## Example

The command:

will take the input file "tptp-COM003+2.p" in TPTP format (-itptp), search for a proof, and produce any proof output in Coq format (-ocoq). tptp-COM003+2.p is a TPTP representation of the halting problem. Zenon can prove this, and will print out:

`(* PROOF-FOUND *)`

`(* BEGIN-PROOF *)`

... details of proof in Coq format`(* END-PROOF *)`

## See Also

## Author

This man page was written by David A. Wheeler.

## Copyright

Zenon is released under the revised BSD license. This man page is released under both the revised BSD and MIT licenses (your choice).