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Proof step 2 from proof s2n-num (previous step)

1 < # str ⊦ s→n(str) = s→n(str.char1 + "") * 10 ^ (# str)-1 + s→n(str.rstring)

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

spec: string2nat inst: name: s2n-rec-01 seq: 1 < # str ⊦ s→n(str) = s→n(str.char1 + "") * 10 ^ (# str)-1 + s→n(str.rstring) subst: [str] → [str] flags: rewrite, current

Additional information

Used simplifier rules: ⊦ m * n = n * m;% ⊦ m + n = n + m; Used terms: str