zenon man page

zenon — Automated theorem prover for first-order classical logic


zenon [Options] FILE


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.


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


provide context for checking the proof independently


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)


read input file in Coq format


read input file in Focal format


read input file in TPTP format


read input file in Zenon format (default)


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)


print the proof in Coq script format


print the proof in Coq term format


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


print the proof in low-level format


print the proof in raw low-level format


print the proof in middle-level format


do not print the proof (default)


do not optimise the proof


do peephole optimisation of the proof (default)


turn off progress bar and progress messages


display progress bar (default)


display progress messages


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


prefix all input symbols to avoid clashes

-rnd <seed>

randomize proof search


print statistics


output a less detailed proof


print version string and exit


print CVS version strings and exit


suppress warnings


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>


The command:

 zenon -itptp -ocoq /usr/share/zenon*/examples/tptp-COM003+2.p

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:

... details of proof in Coq format

See Also



This man page was written by David A. Wheeler.

Referenced By


2008-07 David A. Wheeler User Commands