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Proof step 18 from proof bitsor-sgn-in (previous step)

true ∈ bits, bits0.first ⊦ bits0 = [], bits = [], boolvar ↔ boolvar ∈ bitsor(bits, bits0), false ∈ bits

Heuristic elimination applied rule insert elim lemma

And obtained the following new goals

Proof step 19:
bits0 = boolvar0 + bits1, true ∈ bits, boolvar0 ⊦ bits0 = [], bits = [], boolvar ↔ boolvar ∈ bitsor(bits, bits0), false ∈ bits

Rule argument

seq: bits ≠ [] ⊦ (boolvar ↔ bits.first) ∧ bits0 = bits.rest ↔ bits = boolvar + bits0 subst: [bits, boolvar, bits0] → [bits0, boolvar0, 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: bits0, boolvar0, bits1