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Proof step 12 from proof bitsor-first (previous step)

bitsor(true ', bits0) = false ' + bits1, ∀ bits1, bits, bits2. # bits2 < # bits0 → bitsor(true ' + bits, bits2) = false ' + bits1 → bits2 = [] ⊦ # bits0 = 1, bits0 = false ', bits0 = true ', bits0 = []

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 13:
⊦ bits0 ≠ [] ∧ bits = true ' → bitsor(bits, bits0) = true '

Rule argument

name: or-rec-03 rotate: F subst: [bits0, bits] → [bits0, true ']

Additional information

Used simplifier rules: ⊦ boolvar ' = boolvar0 ' + bits ↔ (boolvar ↔ boolvar0) ∧ bits = [];% ⊦ (bits + bits0) + bits1 = bits + bits0 + bits1; Used terms: bits0, true '