Average Error: 0.0 → 0.0
Time: 50.9s
Precision: 64
\[\frac{-\left(f + n\right)}{f - n}\]
↓
\[\frac{-1}{\frac{f}{f + n} - \frac{n}{f + n}}\]
\frac{-\left(f + n\right)}{f - n}
↓
\frac{-1}{\frac{f}{f + n} - \frac{n}{f + n}}
double f(double f, double n) {
        double r1946708 = f;
        double r1946709 = n;
        double r1946710 = r1946708 + r1946709;
        double r1946711 = -r1946710;
        double r1946712 = r1946708 - r1946709;
        double r1946713 = r1946711 / r1946712;
        return r1946713;
}
↓
double f(double f, double n) {
        double r1946714 = -1.0;
        double r1946715 = f;
        double r1946716 = n;
        double r1946717 = r1946715 + r1946716;
        double r1946718 = r1946715 / r1946717;
        double r1946719 = r1946716 / r1946717;
        double r1946720 = r1946718 - r1946719;
        double r1946721 = r1946714 / r1946720;
        return r1946721;
}

Error

Bits error versus f

Bits error versus n

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Your Program's Arguments

Results

Enter valid numbers for all inputs

Derivation

  1. Initial program 0.0

    \[\frac{-\left(f + n\right)}{f - n}\]
  2. Using strategy rm

  3. Applied *-un-lft-identity0.0

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

  4. Applied distribute-lft-neg-in0.0

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

  5. Applied associate-/l*0.0

    \[\leadsto \color{blue}{\frac{-1}{\frac{f - n}{f + n}}}\]

  6. Simplified0.0

    \[\leadsto \frac{\color{blue}{-1}}{\frac{f - n}{f + n}}\]
  7. Using strategy rm

  8. Applied div-sub0.0

    \[\leadsto \frac{-1}{\color{blue}{\frac{f}{f + n} - \frac{n}{f + n}}}\]

  9. Final simplification0.0

    \[\leadsto \frac{-1}{\frac{f}{f + n} - \frac{n}{f + n}}\]

Reproduce

herbie shell --seed 2019112 
(FPCore (f n)
  :name "subtraction fraction"
  (/ (- (+ f n)) (- f n)))