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Proof step 26 from proof rightshift-8 (previous step)

i % 256 = 0, i < ~128, i < 0 ⊦ i / 256 = bytes2int((¬ i ≤ ~256 ⊃ i2b(~1) ' + i2b(i) ';(i ≠ ~256 ⊃ int2bytes(i / 256) + i2b(0) ';i2b(~1) ' + i2b(0) ')).butlast), # (¬ i ≤ ~256 ⊃ i2b(~1) ' + i2b(i) ';(i ≠ ~256 ⊃ int2bytes(i / 256) + i2b(0) ';i2b(~1) ' + i2b(0) ')) = 1

Heuristic if-then-else split applied rule case distinction

And obtained the following new goals

Proof step 27:
¬ i ≤ ~256, i % 256 = 0, i < ~128, i < 0 ⊦ i / 256 = bytes2int((i2b(~1) ' + i2b(i) ').butlast), # (¬ i ≤ ~256 ⊃ i2b(~1) ' + i2b(i) ';(i ≠ ~256 ⊃ int2bytes(i / 256) + i2b(0) ';i2b(~1) ' + i2b(0) ')) = 1
Proof step 30:
i ≤ ~256, i % 256 = 0, i < ~128, i < 0 ⊦ i / 256 = bytes2int((i ≠ ~256 ⊃ int2bytes(i / 256) + i2b(0) ';i2b(~1) ' + i2b(0) ').butlast), # (¬ i ≤ ~256 ⊃ i2b(~1) ' + i2b(i) ';(i ≠ ~256 ⊃ int2bytes(i / 256) + i2b(0) ';i2b(~1) ' + i2b(0) ')) = 1

Rule argument

pos: right 1

Proof step 26 from proof rightshift-8 (previous step)

Heuristic if-then-else split applied rule case distinction

And obtained the following new goals

Rule argument

Additional information