[isabelle-dev] Quickcheck Examples
makarius at sketis.net
Fri Apr 20 16:29:01 CEST 2012
On Fri, 20 Apr 2012, Lukas Bulwahn wrote:
> On 02/27/2012 02:31 PM, Makarius wrote:
>> The process is running with approx. 100-200% most of the time, which is
>> neither sequential nor fully parallel. Probably you merely benefit from
>> theory parallelism, not from more fine-grained Par_List things that could
>> be used in your own code.
>> One potential source of problems is the pseudo-random generator, with
>> its global state. There have been funny effects in the past that might
>> have come back in one form or the other, even though random generators
>> have been changed several times.
>> Anyway, how long does the session run on "your laptop"?
> I have not noticed that non-termination on my laptop when checking my
> Also with the setting mentioned above, I could not reproduce the
> non-terminating behaviour on macbroy2 with changesets baf90cb2a606.
> I will continue testing Quickcheck-Examples to see if it only occurs
My observation on 27-Feb-2012 was still very crude, I've updated that in a
private mail on 16-Mar-2012.
In particular, "nontermination" means "termination after 1-2 hours", and
it is independent of parallelism:
The isatest settings are in Admin/isatest/settings/.
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