diff -r ace45a11a45e -r bad75618fb82 src/HOL/MicroJava/J/WellForm.thy
--- a/src/HOL/MicroJava/J/WellForm.thy	Thu Jul 02 08:49:04 2020 +0000
+++ b/src/HOL/MicroJava/J/WellForm.thy	Thu Jul 02 12:10:58 2020 +0000
@@ -532,7 +532,6 @@
 apply (erule_tac x = "Da" in allE)
 apply (clarsimp)
  apply (simp add: map_of_map)
- apply (clarify)
  apply (subst method_rec, assumption+)
  apply (simp add: map_add_def map_of_map split: option.split)
 done
@@ -552,7 +551,6 @@
 apply (erule_tac x = "Da" in allE)
 apply (clarsimp)
  apply (simp add: map_of_map)
- apply (clarify)
  apply (subst method_rec, assumption+)
  apply (simp add: map_add_def map_of_map split: option.split)
 done
@@ -599,7 +597,6 @@
 apply (simp (no_asm_use) only: map_add_Some_iff)
 apply (erule disjE)
 apply (simp (no_asm_use) add: map_of_map) apply blast
-apply blast
 apply (rule trans [symmetric], rule sym, assumption)
 apply (rule_tac x=vn in fun_cong)
 apply (rule trans, rule field_rec, assumption+)