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Proof step 37 from proof bitsxor-is-orand (previous step)

∀ bits, bits1. # bits1 < # false ' → true → bits = [] ∨ bits1 = [] ∨ bits2int(bitsxor(bits, bits1)) = bits2int(bitsor(bitsand(bitsinvert(bits), bits1), bitsand(bitsinvert(bits1), bits))) ⊦ bits2int(bits) = bits2int(bitsor(false ', bits)), bits = []

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 38:
⊦ bits0 ≠ [] ∧ bits = false ' → bitsor(bits, bits0) = bits0

Rule argument

name: or-rec-04 rotate: F subst: [bits0, bits] → [bits, false ']

Additional information

Used terms: bits, false '