diff -r 4195e75a92ef -r 478b7599a1a0 src/HOL/SMT.thy
--- a/src/HOL/SMT.thy	Tue Sep 08 11:32:57 2020 +0200
+++ b/src/HOL/SMT.thy	Wed Sep 30 18:37:22 2020 +0200
@@ -346,7 +346,7 @@
 (given in seconds) to restrict their runtime.
 \<close>
 
-declare [[smt_timeout = 20]]
+declare [[smt_timeout = 1000000]]
 
 text \<open>
 SMT solvers apply randomized heuristics. In case a problem is not