Average Error: 0.3 → 0.2
Time: 2.3s
Precision: binary64
\[\left(\left(x \cdot 3\right) \cdot y\right) \cdot y\]
↓
\[y \cdot \left(x \cdot \left(3 \cdot y\right)\right)\]
\left(\left(x \cdot 3\right) \cdot y\right) \cdot y
↓
y \cdot \left(x \cdot \left(3 \cdot y\right)\right)
(FPCore (x y) :precision binary64 (* (* (* x 3.0) y) y))
↓
(FPCore (x y) :precision binary64 (* y (* x (* 3.0 y))))
double code(double x, double y) {
	return ((x * 3.0) * y) * y;
}
↓
double code(double x, double y) {
	return y * (x * (3.0 * y));
}

Error

Bits error versus x

Bits error versus y

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Target

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

Derivation

  1. Initial program 0.3

    \[\left(\left(x \cdot 3\right) \cdot y\right) \cdot y\]
  2. Using strategy rm

  3. Applied associate-*l*_binary640.2

    \[\leadsto \color{blue}{\left(x \cdot \left(3 \cdot y\right)\right)} \cdot y\]

  4. Final simplification0.2

    \[\leadsto y \cdot \left(x \cdot \left(3 \cdot y\right)\right)\]

Reproduce

herbie shell --seed 2020219 
(FPCore (x y)
  :name "Diagrams.Segment:$catParam from diagrams-lib-1.3.0.3, B"
  :precision binary64

  :herbie-target
  (* (* x (* 3.0 y)) y)

  (* (* (* x 3.0) y) y))