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Proof step 4 from proof intshiftzero-mone (previous step)

⊦ bits2int(sublist(0, # fillsgn(32, int2bits(~1)), mklist(false, i→n(bits2int(bitsand(int2bits(16), int2bits(31))))) + fillsgn(32, int2bits(~1)))) = 65535

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 5:
⊦ i + 1 = 0 → int2bits(i) = true '
Proof step 6:
~1 + 1 = 0 ⊦ bits2int(sublist(0, # fillsgn(32, true '), mklist(false, i→n(bits2int(bitsand(int2bits(16), int2bits(31))))) + fillsgn(32, true '))) = 65535

Rule argument

seq: ⊦ i + 1 = 0 → int2bits(i) = true ' subst: [i] → [~1] rotate: F spec: int2bits inst: name: int2bits-mone

Additional information

Used terms: ~1