This trace doesn’t tell us much because it’s only blast’s internal search. Looks like every “continuous_on” goal is immediately solved. But after this search exits, the reconstructed Isabelle proof will fail. Blast will re-enter but it will only find these unsound proofs, and probably won’t ever terminate. Larry
> On 2 Sep 2018, at 15:00, Manuel Eberl <ebe...@in.tum.de> wrote: > > Okay I did some more experiments and I was now, interestingly enough, > completely unable to reproduce the situation where Green /didn't/ > timeout. So I have no idea what was going on there; perhaps I made a > mistake in testing it. I don't know. > > It might be wise to remove "continuous_on_discrete" etc. from > intro/continuous_intros and declare it as a simp rule instead. I'm still > not quite sure what causes these problems. I attached a log of blast > with "blast_trace" enabled. > > Manuel > > On 01/09/2018 14:20, Makarius wrote: >> This thread consists of two sub-threads. The hardware / OS question >> still needs to be sorted out: it might be something with Arch Linux. >> >> Apart from that, my reading of blast.ML is that the "continuous_on" rule >> is applied in the search independently of its fine-grained type >> information. Is that correct? >> >> >> Makarius >> >> >> On 01/09/18 13:19, Lawrence Paulson wrote: >>> Surely the main issue that blast somehow behaves differently depending upon >>> which machine it’s running on? >>> >>> Larry >>> >>>> On 31 Aug 2018, at 22:35, Makarius <makar...@sketis.net> wrote: >>>> >>>> On 31/08/18 22:00, Manuel Eberl wrote: >>>>> That's interesting. I suspected one of the "continuous_on" rules would >>>>> be the cause. In any case, I don't know how the unification works >>>>> exactly w.r.t. sorts, but the "continuous_on_discrete" rule does not >>>>> apply to this goal at all due to its restrictive type class constraint. >>>> Blast does its own unification, without taking fully account of types >>>> and type classes. The found proof is then reconstructed as in "fast" and >>>> its friends, using regular Isabelle term + type unification. >>>> >>>> Larry should be able to say more precisely, what the limits of blast are. > <log.txt><pEpkey.asc> _______________________________________________ isabelle-dev mailing list isabelle-...@in.tum.de https://mailmanbroy.informatik.tu-muenchen.de/mailman/listinfo/isabelle-dev
