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Proof step 48 from proof bitsand-cast-04 (previous step)

n ≤ # bits, # bits1 < n ⊦ sgn(bitsand(lastn(n, bits), false ' + bits1)) = sgn(bitsand(bits, false ' + bits1)), bits = []

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 49:
n ≤ # bits, # bits1 < n, # bits1 < # bits ⊦ sgn(bitsand(lastn(n, bits), false ' + bits1)) = sgn(bitsand(bits, false ' + bits1)), bits = []

Rule argument

Additional information

Used simplifier rules: ⊦ # bits = 0 ↔ bits = [];% ⊦ m < n → n ≠ 0; (forward)% ⊦ m < n ∧ n ≤ n0 → m < n0; (forward)