(may be someone else would need this)

For now I ended up parsing the result of `spot.bdd_format_set`
which nicely prints things like

    <cancel:0, grant:0, req:0, go:0><cancel:1, grant:0, req:1, go:0>

(bdd as a set of cubes enclosed in <>)

(  the formula was (!cancel & !grant & !reg & !go) | (cancel & !grant & reg & !go)  )

(if there is a better way -- write:)


thanks,
Ayrat

On Wed, Mar 8, 2017 at 11:32 AM, Ayrat Khalimov <ayrat.khalimov@gmail.com> wrote:
hi!

With the aid of SPOT I am developing a counter-example guided synthesizer in python. See [1] if interested for details.
My question is:

I am trying to parse twa_run in python,
namely, parse the labels of the each step (`spot.impl.step`).
Is there a python way to walk through BDD?
(The label is a simple cube expressed in BDD, and I need to convert it into my internal structure)

(yes, this is rather a question about python interface for buddy)
(no, that is not feature request:) if not possible, I will simply print the label and parse the string, that is not crucial)


[1]
The idea is
- guess the model,
- then model check it and get a counter-example
- then encode the counter-example into the "guesser" (which uses an SMT solver)


thanks,
Ayrat