I forgot to mention SMT-LIB[1] and pySMT[2].  I don't want to say their are optimal, I just think You might find it interesting.  

  I think it would be even better with Curryed[0] Functions.  As an example ``'(f a1 a2)'' is just a Syntactic Sugar for ``'((f a1) a2)''.  

  Don't forget something like `help' in Python :) .  

[0]: https://en.wikipedia.org/wiki/Currying [1]: http://www.smtlib.org/ [2]: https://github.com/pysmt/pysmt