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Proof step 1 from proof notequal-01 (conclusion)
~32768 ≤ i, i ≤ 32767, ~32768 ≤ j, j ≤ 32767, i ≠ j ⊦ i2s((* i)) ≠ i2s((* j))
Special step normalize
And obtained the following new goals
Proof step 2
:
~32768 ≤ i, i ≤ 32767, ~32768 ≤ j, j ≤ 32767, i ≠ j ⊦ i2s(i) ≠ i2s(j)