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Proof step 4 from proof uint2bits-sgn-first (previous step)

¬(bitsinvert(uint2bits(j)) +1.first ∧ bitsinvert(uint2bits(j)) +1 ≠ []), sgn(bitsinvert(uint2bits(j)) +1) = false ' + bits, 0 < j ⊦

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 5:
sgn(bitsinvert(uint2bits(j)) +1) = false ' + bits, 0 < j ⊦ bitsinvert(uint2bits(j)) +1.first

Rule argument

Additional information

Used simplifier rules: ⊦ ¬ bits +1 ≠ [] ↔ false;