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Proof step 350 from proof bitsand-cast (previous step)

n ≠ # fillsgn(n, mklist(false, # bits0)), n = # fillsgn(n, bits), # bits0 + 1 < n, # bits0 < # bits, # bits < n, # bits0 < n ⊦ mklist(false, n) = lastn(n, fillsgn(n, mklist(false, # bits0))), bits0 = [], bits = [], bits0.first, true ∈ bits

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 351:
n = # fillsgn(n, bits), # bits0 < n, # bits < n, # bits0 < # bits, # bits0 + 1 < n ⊦ n = # fillsgn(n, mklist(false, # bits0)), bits = [], bits0 = [], mklist(false, n) = lastn(n, fillsgn(n, mklist(false, # bits0))), true ∈ bits, bits0.first

Proof step 350 from proof bitsand-cast (previous step)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

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