*To*: isabelle-users at cl.cam.ac.uk*Subject*: [isabelle] Handling failed proof*From*: John Munroe <munddr at gmail.com>*Date*: Wed, 29 Sep 2010 20:12:09 +0100

Hi, I'm wondering why the exception handling in the following doesn't behave what I expected to. Does it not try to prove goal1, and if it fails, it tries to prove goal2? goal2 should be provable, but I still get a Proof failed exception. let val ctxt = @{context} val goal1 = @{prop "EX x y. x > y"} val goal2 = @{prop "EX (x::real) y. x > y"} in Goal.prove ctxt [] [] goal1 (fn _ => auto_tac (clasimpset_of ctxt)) handle THM _ => Goal.prove ctxt [] [] goal2 (fn _ => auto_tac (clasimpset_of ctxt)) end; Thank you for the help. John

**Follow-Ups**:**Re: [isabelle] Handling failed proof***From:*Makarius

**Re: [isabelle] Handling failed proof***From:*Alexander Krauss

**Re: [isabelle] Handling failed proof***From:*Jeremy Dawson

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