Average Error: 0.4 → 0.0
Time: 16.2s
Precision: 64
\[1 \le a \le 2 \le b \le 4 \le c \le 8 \le d \le 16 \le e \le 32\]
\[\left(\left(\left(e + d\right) + c\right) + b\right) + a\]
↓
\[\log \left(e^{e} \cdot \left(e^{a} \cdot \left(\left(e^{c} \cdot e^{d}\right) \cdot e^{b}\right)\right)\right)\]
\left(\left(\left(e + d\right) + c\right) + b\right) + a
↓
\log \left(e^{e} \cdot \left(e^{a} \cdot \left(\left(e^{c} \cdot e^{d}\right) \cdot e^{b}\right)\right)\right)
double f(double a, double b, double c, double d, double e) {
        double r3581913 = e;
        double r3581914 = d;
        double r3581915 = r3581913 + r3581914;
        double r3581916 = c;
        double r3581917 = r3581915 + r3581916;
        double r3581918 = b;
        double r3581919 = r3581917 + r3581918;
        double r3581920 = a;
        double r3581921 = r3581919 + r3581920;
        return r3581921;
}
↓
double f(double a, double b, double c, double d, double e) {
        double r3581922 = e;
        double r3581923 = exp(r3581922);
        double r3581924 = a;
        double r3581925 = exp(r3581924);
        double r3581926 = c;
        double r3581927 = exp(r3581926);
        double r3581928 = d;
        double r3581929 = exp(r3581928);
        double r3581930 = r3581927 * r3581929;
        double r3581931 = b;
        double r3581932 = exp(r3581931);
        double r3581933 = r3581930 * r3581932;
        double r3581934 = r3581925 * r3581933;
        double r3581935 = r3581923 * r3581934;
        double r3581936 = log(r3581935);
        return r3581936;
}

Error

Bits error versus a

Bits error versus b

Bits error versus c

Bits error versus d

Bits error versus e

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Target

Original0.4
Target0.2
Herbie0.0
\[\left(d + \left(c + \left(a + b\right)\right)\right) + e\]

Derivation

  1. Initial program 0.4

    \[\left(\left(\left(e + d\right) + c\right) + b\right) + a\]
  2. Using strategy rm

  3. Applied add-log-exp0.4

    \[\leadsto \left(\left(\left(e + d\right) + c\right) + b\right) + \color{blue}{\log \left(e^{a}\right)}\]

  4. Applied add-log-exp0.4

    \[\leadsto \left(\left(\left(e + d\right) + c\right) + \color{blue}{\log \left(e^{b}\right)}\right) + \log \left(e^{a}\right)\]

  5. Applied add-log-exp0.4

    \[\leadsto \left(\left(\left(e + d\right) + \color{blue}{\log \left(e^{c}\right)}\right) + \log \left(e^{b}\right)\right) + \log \left(e^{a}\right)\]

  6. Applied add-log-exp0.4

    \[\leadsto \left(\left(\color{blue}{\log \left(e^{e + d}\right)} + \log \left(e^{c}\right)\right) + \log \left(e^{b}\right)\right) + \log \left(e^{a}\right)\]

  7. Applied sum-log0.4

    \[\leadsto \left(\color{blue}{\log \left(e^{e + d} \cdot e^{c}\right)} + \log \left(e^{b}\right)\right) + \log \left(e^{a}\right)\]

  8. Applied sum-log0.3

    \[\leadsto \color{blue}{\log \left(\left(e^{e + d} \cdot e^{c}\right) \cdot e^{b}\right)} + \log \left(e^{a}\right)\]

  9. Applied sum-log0.2

    \[\leadsto \color{blue}{\log \left(\left(\left(e^{e + d} \cdot e^{c}\right) \cdot e^{b}\right) \cdot e^{a}\right)}\]

  10. Simplified0.3

    \[\leadsto \log \color{blue}{\left(e^{\left(a + \left(b + \left(d + c\right)\right)\right) + e}\right)}\]
  11. Using strategy rm

  12. Applied add-log-exp0.3

    \[\leadsto \log \left(e^{\left(a + \left(b + \left(d + c\right)\right)\right) + \color{blue}{\log \left(e^{e}\right)}}\right)\]

  13. Applied add-log-exp0.3

    \[\leadsto \log \left(e^{\left(a + \left(b + \left(d + \color{blue}{\log \left(e^{c}\right)}\right)\right)\right) + \log \left(e^{e}\right)}\right)\]

  14. Applied add-log-exp0.3

    \[\leadsto \log \left(e^{\left(a + \left(b + \left(\color{blue}{\log \left(e^{d}\right)} + \log \left(e^{c}\right)\right)\right)\right) + \log \left(e^{e}\right)}\right)\]

  15. Applied sum-log0.3

    \[\leadsto \log \left(e^{\left(a + \left(b + \color{blue}{\log \left(e^{d} \cdot e^{c}\right)}\right)\right) + \log \left(e^{e}\right)}\right)\]

  16. Applied add-log-exp0.3

    \[\leadsto \log \left(e^{\left(a + \left(\color{blue}{\log \left(e^{b}\right)} + \log \left(e^{d} \cdot e^{c}\right)\right)\right) + \log \left(e^{e}\right)}\right)\]

  17. Applied sum-log0.2

    \[\leadsto \log \left(e^{\left(a + \color{blue}{\log \left(e^{b} \cdot \left(e^{d} \cdot e^{c}\right)\right)}\right) + \log \left(e^{e}\right)}\right)\]

  18. Applied add-log-exp0.2

    \[\leadsto \log \left(e^{\left(\color{blue}{\log \left(e^{a}\right)} + \log \left(e^{b} \cdot \left(e^{d} \cdot e^{c}\right)\right)\right) + \log \left(e^{e}\right)}\right)\]

  19. Applied sum-log0.2

    \[\leadsto \log \left(e^{\color{blue}{\log \left(e^{a} \cdot \left(e^{b} \cdot \left(e^{d} \cdot e^{c}\right)\right)\right)} + \log \left(e^{e}\right)}\right)\]

  20. Applied sum-log0.0

    \[\leadsto \log \left(e^{\color{blue}{\log \left(\left(e^{a} \cdot \left(e^{b} \cdot \left(e^{d} \cdot e^{c}\right)\right)\right) \cdot e^{e}\right)}}\right)\]

  21. Applied rem-exp-log0.0

    \[\leadsto \log \color{blue}{\left(\left(e^{a} \cdot \left(e^{b} \cdot \left(e^{d} \cdot e^{c}\right)\right)\right) \cdot e^{e}\right)}\]

  22. Final simplification0.0

    \[\leadsto \log \left(e^{e} \cdot \left(e^{a} \cdot \left(\left(e^{c} \cdot e^{d}\right) \cdot e^{b}\right)\right)\right)\]

Reproduce

herbie shell --seed 2019132 +o rules:numerics
(FPCore (a b c d e)
  :name "Expression 1, p15"
  :pre (<= 1 a 2 b 4 c 8 d 16 e 32)

  :herbie-target
  (+ (+ d (+ c (+ a b))) e)

  (+ (+ (+ (+ e d) c) b) a))