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Proof step 9 from proof fix-rec-neg (previous step)

#(by ' + bytes0) < n ∧ bytes2int(by ' + bytes0) < 0, 1 + # bytes0 < n, b2i(by) < 0 ⊦ mklist(i2b(~1), n - #(by ' + bytes0)) + by ' + bytes0 = i2b(~1) ' + fix(n - 1, by ' + bytes0)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 10:
b2i(by) < 0, 1 + # bytes0 < n, bytes2int(by ' + bytes0) < 0 ⊦ mklist(i2b(~1), n - 1 + # bytes0) + by ' + bytes0 = i2b(~1) ' + fix(n - 1, by ' + bytes0)

Rule argument

Additional information

Used simplifier rules: ⊦ j < i ∧ i ≤ 0 → j < 0; (forward)% ⊦ (bytes + bytes0) + bytes1 = bytes + bytes0 + bytes1;% ⊦ # by ' = 0 +1;% ⊦ #(bytes + bytes0) = # bytes + # bytes0;