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Proof step 30 from proof bits2bits-def (previous step)

¬ bits.first ∧ bits ≠ [] ⊦ bits = [], int2bits(bits2uint(bits.rest)) = sgn(bits)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 31:
⊦ bits = [], int2bits(bits2uint(bits.rest)) = sgn(bits), bits.first

Rule argument

Additional information