# -*- coding: utf-8 -*-
#+TITLE: Spot
#+SETUPFILE: setup.org

Spot is a C++11 library for ω-automata manipulation and model
checking.  It has the following notable features:

- Support for LTL (several syntaxes supported) and the linear fragment of PSL.
- Support for ω-automata with arbitrary acceptance condition.
- Support for transition-based acceptance (state-based acceptance
  is supported by a reduction to transition-based acceptance).
- The automaton parser can read a stream of automata written in any of
  three syntaxes ([[http://spinroot.com/spin/Man/never.html][never claims]], [[file:hoa.org][HOA]], or [[http://www.tcs.hut.fi/Software/lbtt/doc/html/Format-for-automata.html][LBTT]]).
- Several algorithms for formula manipulation including: simplifying
  formulas, testing implication or equivalence, testing
  stutter-invariance, removing some operators by rewriting, ...
- Several algorithms for automata manipulation including: product,
  emptiness checks, simulation-based reductions,
  minimization of weak-DBA, removal of useless SCCs,
  acceptance-condition transformations, etc.
- In addition to the C++ interface, most of its algorithms
  are usable via [[file:tools.org][command-line tools]], and via Python bindings.
- One of the command-line tool, called [[file:ltlcross.org][=ltlcross=]] is a rewrite
  of [[http://www.tcs.hut.fi/Software/lbtt/][LBTT]], but with support for PSL and arbitrary acceptance conditions.
  It could for instance be used to test tools that translate
  LTL into Rabin automata.

* Latest version

The latest version is *{{{LASTRELEASE}}}* and was released on
*{{{LASTDATE}}}*.  You can [[file:install.org][download it here]].

* Documentation

- [[file:tools.org][Command-line tools]]
- [[file:tut.org][Code examples]]

* License

Spot is distributed under a [[http://www.gnu.org/licenses/gpl-3.0.html][GNU GPL v3 license]].

A consequence is that if you distribute a tool built using Spot, you
*must* make the source code of that tool available as well.

* Staying in touch

=spot-announce@lrde.epita.fr= is an extremely low-traffic and
read-only mailing list for release announcements.  If you want to stay
informed about future releases of Spot, we invite you to [[https://lists.lrde.epita.fr/listinfo/spot-announce][subscribe]].

[[mailto:spot@lrde.epita.fr][=spot@lrde.epita.fr=]] is a list for general discussions and questions
about Spot. [[https://lists.lrde.epita.fr/listinfo/spot][Subscribe here]] if you want to join, but feel free to send
in any question (in English) or bug report without subscribing.