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Proof step 3 from proof less-append (previous step)

str < str ⊦

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 4:
⊦ ¬ str < str

Rule argument

spec: string-less inst: name: Irreflexivity seq: ⊦ ¬ str < str subst: [str] → [str] flags: rewrite, current

Additional information

Used terms: str