Average Error: 0.3 → 0.3
Time: 22.8s
Precision: 64
\[\frac{a}{-\cos^{-1} a}\]
↓
\[\frac{a}{-\cos^{-1} a}\]
\frac{a}{-\cos^{-1} a}
↓
\frac{a}{-\cos^{-1} a}
double f(double a) {
        double r2163878 = a;
        double r2163879 = acos(r2163878);
        double r2163880 = -r2163879;
        double r2163881 = r2163878 / r2163880;
        return r2163881;
}
↓
double f(double a) {
        double r2163882 = a;
        double r2163883 = acos(r2163882);
        double r2163884 = -r2163883;
        double r2163885 = r2163882 / r2163884;
        return r2163885;
}

Error

Bits error versus a

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Results

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Derivation

  1. Initial program 0.3

    \[\frac{a}{-\cos^{-1} a}\]

  2. Final simplification0.3

    \[\leadsto \frac{a}{-\cos^{-1} a}\]

Reproduce

herbie shell --seed 2019144 +o rules:numerics
(FPCore (a)
  :name "Fuzzer 001"
  (/ a (- (acos a))))