(- (- x 1) x)

Average Error: 29.5 → 0

Time: 546.0ms

Precision: binary64

Math

\[\left(x - 1\right) - x\]

↓

\[-1\]

Error

Bits error versus x

Derivation

1. Initial program 29.5

   \[\left(x - 1\right) - x\]

2. Simplified 0

   \[\leadsto \color{blue}{-1}\]

3. Final simplification 0

   \[\leadsto -1\]

Reproduce

herbie shell --seed 2020153 
(FPCore (x)
  :name "(- (- x 1) x)"
  :precision binary64
  (- (- x 1.0) x))