[isabelle] sledgehammer (or Z3) internal error



The attached theory causes a sledgehammer error in Isabelle 2020.

The theory is as small as I have been able to make it. Seemingly unrelated things like the datatype declaration, the function p and even the locale names (!) matter.

Even more odd is that editing the theory in Isabelle and then undoing the edits sometimes causes the error to go away. Loading the theory in a fresh instance of Isabelle always triggers the error, however.

Lars-Henrik

Lars-Henrik Eriksson, PhD, Senior Lecturer
Computing Science, Dept. of Information Technology, Uppsala University, Sweden
E-mail: lhe at it.uu.se, Web: http://www.it.uu.se/katalog/lhe?lang=en
Phone: +46 18 471 10 57, Mobile: +46 705-36 39 16, Fax: +46 18 51 19 25








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Attachment: Z3bug.thy
Description: Binary data



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