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Proof step 11 from proof int2bytes-len-le-neg-01 (previous step)

i2b(~1) ' + int2bytes(i).rest.first ' + int2bytes(i).rest.rest = int2bytes(i), int2bytes(i).first = i2b(~1), 0 ≤ 2 ^ ((n→i(# int2bytes(i).rest.rest) + 1) * 8) + bytes2int(i2b(~1) ' + int2bytes(i).rest.first ' + int2bytes(i).rest.rest), bytes2int(i2b(~1) ' + int2bytes(i).rest.first ' + int2bytes(i).rest.rest) + 2 ^ (8 * (n→i(# int2bytes(i).rest.rest) + 1) - 1) < 0, 0 ≤ b2i(int2bytes(i).rest.first) ⊦ n ≤ # int2bytes(i) ↔ ¬ 0 ≤ i + 2 ^ (8 * (n→i(n) - 1) - 1)

User applied rule insert equation

And obtained the following new goals

Proof step 12:
int2bytes(i).first = i2b(~1), 0 ≤ 2 ^ ((n→i(# int2bytes(i).rest.rest) + 1) * 8) + bytes2int(int2bytes(i)), bytes2int(int2bytes(i)) + 2 ^ (8 * (n→i(# int2bytes(i).rest.rest) + 1) - 1) < 0, 0 ≤ b2i(int2bytes(i).rest.first) ⊦ n ≤ # int2bytes(i) ↔ ¬ 0 ≤ i + 2 ^ (8 * (n→i(n) - 1) - 1)

Rule argument

pos: left 1 flags: discard

Proof step 11 from proof int2bytes-len-le-neg-01 (previous step)

User applied rule insert equation

And obtained the following new goals

Rule argument

Additional information