[isabelle] Isabelle-RCX/Windows 64 bits (Sledgehammer)

Dear Users,

In Isabelle-RC2 and -RC1, Sledgehammer often fails to find a proof for the
notorious lemma about indexed sums (with
or without try methods):

lemma aux: "m <= n+1 ==> setsum f {m..n + 1} =
    setsum f {m..n} + f (n + 1 :: int)"

OS: Windows 10 with a Intel i5-5200U CPU @ 2.20GHz

However, the Snapshot version of 23-12 always finds  (very quickly) a proof
with Z3 (with and without try methods).

Alfio Ricardo Martini
PhD in Computer Science (TU Berlin)
Associate Professor at Faculty of Informatics (PUCRS)
Av. Ipiranga, 6681 - PrÃdio 32 - Faculdade de InformÃtica
90619-900 -Porto Alegre - RS - Brasil

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