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Proof step 4 from proof val-total (previous step)

∀ str2. str0 = str2 ∨ str2 < str0 ∨ str0 < str2 ⊦ char + str0 = str2, char + str0 < str2, str2 < char + str0

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 5:
∀ str2. str0 = str2 ∨ str2 < str0 ∨ str0 < str2 ⊦ char ' + str0 = str2, str2 < char ' + str0, char ' + str0 < str2

Rule argument

Additional information

Used simplifier rules: ⊦ char + str = char ' + str; (s)