Average Error: 7.3 → 1.0
Time: 4.0s
Precision: binary64
\[\frac{x}{\left(y - z\right) \cdot \left(t - z\right)}\]
↓
\[\frac{\sqrt[3]{x}}{\sqrt[3]{t - z}} \cdot \left(\frac{\sqrt[3]{x}}{\sqrt[3]{t - z}} \cdot \frac{\frac{\sqrt[3]{x}}{\sqrt[3]{t - z}}}{y - z}\right)\]
\frac{x}{\left(y - z\right) \cdot \left(t - z\right)}
↓
\frac{\sqrt[3]{x}}{\sqrt[3]{t - z}} \cdot \left(\frac{\sqrt[3]{x}}{\sqrt[3]{t - z}} \cdot \frac{\frac{\sqrt[3]{x}}{\sqrt[3]{t - z}}}{y - z}\right)
double code(double x, double y, double z, double t) {
	return (x / ((double) (((double) (y - z)) * ((double) (t - z)))));
}
↓
double code(double x, double y, double z, double t) {
	return ((double) ((((double) cbrt(x)) / ((double) cbrt(((double) (t - z))))) * ((double) ((((double) cbrt(x)) / ((double) cbrt(((double) (t - z))))) * ((((double) cbrt(x)) / ((double) cbrt(((double) (t - z))))) / ((double) (y - z)))))));
}

Error

Bits error versus x

Bits error versus y

Bits error versus z

Bits error versus t

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Target

Original7.3
Target8.1
Herbie1.0
\[\begin{array}{l} \mathbf{if}\;\frac{x}{\left(y - z\right) \cdot \left(t - z\right)} < 0:\\ \;\;\;\;\frac{\frac{x}{y - z}}{t - z}\\ \mathbf{else}:\\ \;\;\;\;x \cdot \frac{1}{\left(y - z\right) \cdot \left(t - z\right)}\\ \end{array}\]

Derivation

  1. Initial program Error: 7.3 bits

    \[\frac{x}{\left(y - z\right) \cdot \left(t - z\right)}\]
  2. Using strategy rm

  3. Applied *-un-lft-identityError: 7.3 bits

    \[\leadsto \frac{\color{blue}{1 \cdot x}}{\left(y - z\right) \cdot \left(t - z\right)}\]

  4. Applied times-fracError: 2.1 bits

    \[\leadsto \color{blue}{\frac{1}{y - z} \cdot \frac{x}{t - z}}\]
  5. Using strategy rm

  6. Applied add-cube-cbrtError: 2.7 bits

    \[\leadsto \frac{1}{y - z} \cdot \frac{x}{\color{blue}{\left(\sqrt[3]{t - z} \cdot \sqrt[3]{t - z}\right) \cdot \sqrt[3]{t - z}}}\]

  7. Applied add-cube-cbrtError: 2.8 bits

    \[\leadsto \frac{1}{y - z} \cdot \frac{\color{blue}{\left(\sqrt[3]{x} \cdot \sqrt[3]{x}\right) \cdot \sqrt[3]{x}}}{\left(\sqrt[3]{t - z} \cdot \sqrt[3]{t - z}\right) \cdot \sqrt[3]{t - z}}\]

  8. Applied times-fracError: 2.8 bits

    \[\leadsto \frac{1}{y - z} \cdot \color{blue}{\left(\frac{\sqrt[3]{x} \cdot \sqrt[3]{x}}{\sqrt[3]{t - z} \cdot \sqrt[3]{t - z}} \cdot \frac{\sqrt[3]{x}}{\sqrt[3]{t - z}}\right)}\]

  9. Applied associate-*r*Error: 1.1 bits

    \[\leadsto \color{blue}{\left(\frac{1}{y - z} \cdot \frac{\sqrt[3]{x} \cdot \sqrt[3]{x}}{\sqrt[3]{t - z} \cdot \sqrt[3]{t - z}}\right) \cdot \frac{\sqrt[3]{x}}{\sqrt[3]{t - z}}}\]

  10. SimplifiedError: 1.0 bits

    \[\leadsto \color{blue}{\left(\frac{\sqrt[3]{x}}{\sqrt[3]{t - z}} \cdot \frac{\frac{\sqrt[3]{x}}{\sqrt[3]{t - z}}}{y - z}\right)} \cdot \frac{\sqrt[3]{x}}{\sqrt[3]{t - z}}\]

  11. Final simplificationError: 1.0 bits

    \[\leadsto \frac{\sqrt[3]{x}}{\sqrt[3]{t - z}} \cdot \left(\frac{\sqrt[3]{x}}{\sqrt[3]{t - z}} \cdot \frac{\frac{\sqrt[3]{x}}{\sqrt[3]{t - z}}}{y - z}\right)\]

Reproduce

herbie shell --seed 2020200 
(FPCore (x y z t)
  :name "Data.Random.Distribution.Triangular:triangularCDF from random-fu-0.2.6.2, B"
  :precision binary64

  :herbie-target
  (if (< (/ x (* (- y z) (- t z))) 0.0) (/ (/ x (- y z)) (- t z)) (* x (/ 1.0 (* (- y z) (- t z)))))

  (/ x (* (- y z) (- t z))))