1.1 --- a/src/HOL/IMP/Big_Step.thy Fri Nov 10 22:05:30 2017 +0100
1.2 +++ b/src/HOL/IMP/Big_Step.thy Tue Nov 14 13:12:13 2017 +0100
1.3 @@ -206,13 +206,11 @@
1.4 thus ?thesis using `\<not>bval b s` by blast
1.5 next
1.6 case IfTrue
1.7 - with `(?iw, s) \<Rightarrow> t` have "(c;; ?w, s) \<Rightarrow> t" by auto
1.8 -- "and for this, only the Seq-rule is applicable:"
1.9 - then obtain s' where
1.10 + from `(c;; ?w, s) \<Rightarrow> t` obtain s' where
1.11 "(c, s) \<Rightarrow> s'" and "(?w, s') \<Rightarrow> t" by auto
1.12 - -- "with this information, we can build a derivation tree for the @{text WHILE}"
1.13 - with `bval b s`
1.14 - show ?thesis by (rule WhileTrue)
1.15 + -- "with this information, we can build a derivation tree for @{text WHILE}"
1.16 + with `bval b s` show ?thesis by (rule WhileTrue)
1.17 qed
1.18 qed
1.19 ultimately