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Proof step 1 from proof charn8 (conclusion)

⊦ s→n("8") = 8

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

spec: string2nat inst: name: s2n-char-01 seq: # str = 1 ⊦ s→n(str) = pos (str.char1, '0' + '1' + '2' + '3' + '4' + '5' + '6' + '7' + ('8' + '9')) subst: [str] → ["8"] flags: rewrite, current

Additional information

Used simplifier rules: str ≠ "" ⊦ # (* str) = # str.rstring + 1;% ⊦ # "" = 0; Used terms: "8"