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Proof step 4 from proof long-shiftzero-in (previous step)

⊦ ¬ l2i(lo) l>>> j < ~9223372036854775808 ∧ ¬ 9223372036854775807 < l2i(lo) l>>> j

User applied rule case distinction

And obtained the following new goals

Proof step 5:
⊦ ¬ l2i(lo) l>>> j < ~9223372036854775808
Proof step 9:
⊦ ¬ 9223372036854775807 < l2i(lo) l>>> j

Rule argument

pos: right 1

Additional information