Average Error: 0.3 → 0.2
Time: 2.9s
Precision: 64
\[x + \left(\left(y - x\right) \cdot 6\right) \cdot z\]
↓
\[x + \left(z \cdot \left(y - x\right)\right) \cdot 6\]
x + \left(\left(y - x\right) \cdot 6\right) \cdot z
↓
x + \left(z \cdot \left(y - x\right)\right) \cdot 6
double code(double x, double y, double z) {
	return ((double) (x + ((double) (((double) (((double) (y - x)) * 6.0)) * z))));
}
↓
double code(double x, double y, double z) {
	return ((double) (x + ((double) (((double) (z * ((double) (y - x)))) * 6.0))));
}

Error

Bits error versus x

Bits error versus y

Bits error versus z

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Target

Original0.3
Target0.2
Herbie0.2
\[x - \left(6 \cdot z\right) \cdot \left(x - y\right)\]

Derivation

  1. Initial program 0.3

    \[x + \left(\left(y - x\right) \cdot 6\right) \cdot z\]
  2. Using strategy rm

  3. Applied flip--24.6

    \[\leadsto x + \left(\color{blue}{\frac{y \cdot y - x \cdot x}{y + x}} \cdot 6\right) \cdot z\]

  4. Applied associate-*l/24.7

    \[\leadsto x + \color{blue}{\frac{\left(y \cdot y - x \cdot x\right) \cdot 6}{y + x}} \cdot z\]

  5. Applied associate-*l/28.4

    \[\leadsto x + \color{blue}{\frac{\left(\left(y \cdot y - x \cdot x\right) \cdot 6\right) \cdot z}{y + x}}\]

  6. Taylor expanded around 0 0.2

    \[\leadsto x + \color{blue}{\left(6 \cdot \left(z \cdot y\right) - 6 \cdot \left(x \cdot z\right)\right)}\]

  7. Simplified0.2

    \[\leadsto x + \color{blue}{\left(z \cdot \left(y - x\right)\right) \cdot 6}\]

  8. Final simplification0.2

    \[\leadsto x + \left(z \cdot \left(y - x\right)\right) \cdot 6\]

Reproduce

herbie shell --seed 2020124 
(FPCore (x y z)
  :name "Data.Colour.RGBSpace.HSL:hsl from colour-2.3.3, E"
  :precision binary64

  :herbie-target
  (- x (* (* 6.0 z) (- x y)))

  (+ x (* (* (- y x) 6.0) z)))