Average Error: 0.0 → 0.0
Time: 711.0ms
Precision: 64
\[x \cdot \left(x - 1\right)\]
↓
\[{x}^{2} + x \cdot \left(-1\right)\]
x \cdot \left(x - 1\right)
↓
{x}^{2} + x \cdot \left(-1\right)
double f(double x) {
        double r412643 = x;
        double r412644 = 1.0;
        double r412645 = r412643 - r412644;
        double r412646 = r412643 * r412645;
        return r412646;
}
↓
double f(double x) {
        double r412647 = x;
        double r412648 = 2.0;
        double r412649 = pow(r412647, r412648);
        double r412650 = 1.0;
        double r412651 = -r412650;
        double r412652 = r412647 * r412651;
        double r412653 = r412649 + r412652;
        return r412653;
}

Error

Bits error versus x

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Target

Original0.0
Target0.0
Herbie0.0
\[x \cdot x - x\]

Derivation

  1. Initial program 0.0

    \[x \cdot \left(x - 1\right)\]
  2. Using strategy rm

  3. Applied sub-neg0.0

    \[\leadsto x \cdot \color{blue}{\left(x + \left(-1\right)\right)}\]

  4. Applied distribute-lft-in0.0

    \[\leadsto \color{blue}{x \cdot x + x \cdot \left(-1\right)}\]

  5. Simplified0.0

    \[\leadsto \color{blue}{{x}^{2}} + x \cdot \left(-1\right)\]

  6. Final simplification0.0

    \[\leadsto {x}^{2} + x \cdot \left(-1\right)\]

Reproduce

herbie shell --seed 2020060 
(FPCore (x)
  :name "Statistics.Correlation.Kendall:numOfTiesBy from math-functions-0.1.5.2"
  :precision binary64

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

  (* x (- x 1)))