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Proof step 8 from proof getint-abs (previous step)

dec.int < 0 ⊦ dec.int + ~ mkDecimal(dec.int, dec.scale).int = 0

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 9:
dec.int < 0 ⊦ dec.int = mkDecimal(dec.int, dec.scale).int

Rule argument

Additional information

Used simplifier rules: add-zero: ⊦ i + 0 = i; from specification int-basic2%sub-eq: ⊦ i - j = i0 ↔ i = i0 + j; from specification int-abs%add-c: ⊦ i + j = j + i; from specification int-basic2%add-a: ⊦ i + j + i0 = (i + j) + i0; from specification int-basic2%neg-15: ⊦ i + ~ j = i - j; from specification int-abs