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Proof step 14 from proof val-trans (previous step)

char = char0, char0 ' + str < str3, str0 < str, ∀ str3, char, str0. str < str3 ∧ char ' + str0 < str ∧ (∀ str2, str3. str2 < str3 ∧ str0 < str2 → str0 < str3) → char ' + str0 < str3, ∀ str2, str3. str2 < str3 ∧ str0 < str2 → str0 < str3 ⊦ char ' + str0 < str3

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 15:
str0 < str, char0 ' + str < str3, ∀ str2, str3. str2 < str3 ∧ str0 < str2 → str0 < str3, ∀ str3, char, str0. str < str3 ∧ char ' + str0 < str ∧ (∀ str2, str3. str2 < str3 ∧ str0 < str2 → str0 < str3) → char ' + str0 < str3 ⊦ char0 ' + str0 < str3

Proof step 14 from proof val-trans (previous step)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

Additional information