follow recent changes of Sledgehammer defaults, as 0a46b3dbd5ad exposes a hint in the source text;
--- a/src/HOL/Tools/etc/options Tue Jan 10 11:06:20 2023 +0000
+++ b/src/HOL/Tools/etc/options Wed Jan 11 15:00:06 2023 +0100
@@ -26,7 +26,7 @@
section "Miscellaneous Tools"
-public option sledgehammer_provers : string = "cvc4 vampire verit e spass z3 zipperposition"
+public option sledgehammer_provers : string = "cvc4 verit z3 e spass vampire zipperposition"
-- "provers for Sledgehammer (separated by blanks)"
public option sledgehammer_timeout : int = 30