Average Error: 7.4 → 0.8
Time: 16.9s
Precision: 64
\[\frac{x}{\left(y - z\right) \cdot \left(t - z\right)}\]
↓
\[\begin{array}{l} \mathbf{if}\;\left(y - z\right) \cdot \left(t - z\right) \le -6.059807205138159821074577788383065783998 \cdot 10^{153} \lor \neg \left(\left(y - z\right) \cdot \left(t - z\right) \le 2.837428587682230126049873099227392657567 \cdot 10^{298}\right):\\ \;\;\;\;\frac{\frac{x}{y - z}}{t - z}\\ \mathbf{else}:\\ \;\;\;\;\frac{x}{\left(y - z\right) \cdot \left(t - z\right)}\\ \end{array}\]
\frac{x}{\left(y - z\right) \cdot \left(t - z\right)}
↓
\begin{array}{l}
\mathbf{if}\;\left(y - z\right) \cdot \left(t - z\right) \le -6.059807205138159821074577788383065783998 \cdot 10^{153} \lor \neg \left(\left(y - z\right) \cdot \left(t - z\right) \le 2.837428587682230126049873099227392657567 \cdot 10^{298}\right):\\
\;\;\;\;\frac{\frac{x}{y - z}}{t - z}\\

\mathbf{else}:\\
\;\;\;\;\frac{x}{\left(y - z\right) \cdot \left(t - z\right)}\\

\end{array}
double f(double x, double y, double z, double t) {
        double r539934 = x;
        double r539935 = y;
        double r539936 = z;
        double r539937 = r539935 - r539936;
        double r539938 = t;
        double r539939 = r539938 - r539936;
        double r539940 = r539937 * r539939;
        double r539941 = r539934 / r539940;
        return r539941;
}
↓
double f(double x, double y, double z, double t) {
        double r539942 = y;
        double r539943 = z;
        double r539944 = r539942 - r539943;
        double r539945 = t;
        double r539946 = r539945 - r539943;
        double r539947 = r539944 * r539946;
        double r539948 = -6.05980720513816e+153;
        bool r539949 = r539947 <= r539948;
        double r539950 = 2.83742858768223e+298;
        bool r539951 = r539947 <= r539950;
        double r539952 = !r539951;
        bool r539953 = r539949 || r539952;
        double r539954 = x;
        double r539955 = r539954 / r539944;
        double r539956 = r539955 / r539946;
        double r539957 = r539954 / r539947;
        double r539958 = r539953 ? r539956 : r539957;
        return r539958;
}

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

Original7.4
Target8.3
Herbie0.8
\[\begin{array}{l} \mathbf{if}\;\frac{x}{\left(y - z\right) \cdot \left(t - z\right)} \lt 0.0:\\ \;\;\;\;\frac{\frac{x}{y - z}}{t - z}\\ \mathbf{else}:\\ \;\;\;\;x \cdot \frac{1}{\left(y - z\right) \cdot \left(t - z\right)}\\ \end{array}\]

Derivation

  1. Split input into 2 regimes

  2. if (* (- y z) (- t z)) < -6.05980720513816e+153 or 2.83742858768223e+298 < (* (- y z) (- t z))

    1. Initial program 13.8

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

    3. Applied associate-/r*0.3

      \[\leadsto \color{blue}{\frac{\frac{x}{y - z}}{t - z}}\]

    if -6.05980720513816e+153 < (* (- y z) (- t z)) < 2.83742858768223e+298

    1. Initial program 1.2

      \[\frac{x}{\left(y - z\right) \cdot \left(t - z\right)}\]
  3. Recombined 2 regimes into one program.

  4. Final simplification0.8

    \[\leadsto \begin{array}{l} \mathbf{if}\;\left(y - z\right) \cdot \left(t - z\right) \le -6.059807205138159821074577788383065783998 \cdot 10^{153} \lor \neg \left(\left(y - z\right) \cdot \left(t - z\right) \le 2.837428587682230126049873099227392657567 \cdot 10^{298}\right):\\ \;\;\;\;\frac{\frac{x}{y - z}}{t - z}\\ \mathbf{else}:\\ \;\;\;\;\frac{x}{\left(y - z\right) \cdot \left(t - z\right)}\\ \end{array}\]

Reproduce

herbie shell --seed 2019303 
(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 (* (- y z) (- t z)))))

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