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Proof step 2 from proof bitsand-first-samesize (previous step)

# bits = # bits0 ⊦ bitsand(bits, bits0) = (bits.first ∧ bits0.first)' + bitsand(bits.rest, bits0.rest), # bits0 = 1, bits = []

Heuristic elimination applied rule insert elim lemma

And obtained the following new goals

Proof step 3:
bits = boolvar + bits1, # bits = # bits0 ⊦ bitsand(bits, bits0) = (boolvar ∧ bits0.first)' + bitsand(bits1, bits0.rest), # bits0 = 1, bits = []

Rule argument

seq: bits ≠ [] ⊦ (boolvar ↔ bits.first) ∧ bits0 = bits.rest ↔ bits = boolvar + bits0 subst: [bits, boolvar, bits0] → [bits, boolvar, bits1] rotate: T spec: list-data inst: bitlista name: elim-list-c

Additional information

Used simplifier rules: bits ≠ [] ⊦ (boolvar ↔ bits.first) ∧ bits0 = bits.rest ↔ bits = boolvar + bits0; (elim) Used terms: bits, boolvar, bits1