[Spot] Kripke, twa_product and twa_graph

Dear Spot devs, I am not sure how I am supposed to work with Kripke structures (which I imported using ltsmin) or `twa_product` (which I obtained using `otf_product` on the Kripke structure). In the screenshot below I can invoke 'exclusive_word' with no problems on a `kripke` and `twa_product` but the same is not true for 'contains' which returns a type error. The way I found to invoke 'contains' without errors is to use 'save' and then 'automaton' to read that same file again in order to get `twa_graph` as expected by `contains`. I am not sure this workaround is what the devs had in mind. Thank you for clarifying, PierreG [image: image.png]