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Proof step 12 from proof long-is-cast (previous step)

¬ 64 < # int2bits(i) ⊦ l2i(i2l(bits2int(lastn(64, int2bits(i))))) = cast(64, i), i ∈long

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

Additional information

Used simplifier rules: ⊦ ¬ m < n ↔ n ≤ m;