[isabelle-dev] Fwd: [Isabelle-ci] Build failure in AFP

Makarius makarius at sketis.net
Sat Sep 1 14:20:48 CEST 2018

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?


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 <makarius at 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.

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