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Proof step 5 from proof int2bits-pred (previous step)

0 < j ⊦ uint2bits(j - 1) = sgn(bitsinvert(bitsinvert(int2bits(j)) +1))

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 6:
⊦ 0 < j → uint2bits(j - 1) = sgn(bitsinvert(bitsinvert(uint2bits(j)) +1))
Proof step 7:
0 < j, 0 < j ⊦ sgn(bitsinvert(bitsinvert(uint2bits(j)) +1)) = sgn(bitsinvert(bitsinvert(int2bits(j)) +1))

Rule argument

name: uint2bits-pred rotate: F subst: [j] → [j]

Additional information

Used terms: j