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Proof step 4 from proof bytes2int-len-one-02 (previous step)

0 ≤ bytes2int(i2b(0) ' + bytes0), b2i(bytes0.first) < 0, bytes2int(i2b(0) ' + bytes0) < 128 ⊦ bytes0 = []

Heuristic elimination applied rule insert elim lemma

And obtained the following new goals

Proof step 5:
bytes0 = by + bytes, 0 ≤ bytes2int(i2b(0) ' + bytes0), b2i(by) < 0, bytes2int(i2b(0) ' + bytes0) < 128 ⊦ bytes0 = []

Rule argument

seq: bytes ≠ [] ⊦ by = bytes.first ∧ bytes0 = bytes.rest ↔ bytes = by + bytes0 subst: [bytes, by, bytes0] → [bytes0, by, bytes] rotate: T spec: list-data inst: bytelist name: elim-list-c

Additional information

Used simplifier rules: bytes ≠ [] ⊦ by = bytes.first ∧ bytes0 = bytes.rest ↔ bytes = by + bytes0; (elim) Used terms: bytes0, by, bytes