Average Error: 0.4 → 0.0
Time: 15.7s
Precision: 64
\[1 \le a \le 2 \le b \le 4 \le c \le 8 \le d \le 16 \le e \le 32\]
\[\left(\left(\left(e + d\right) + c\right) + b\right) + a\]
↓
\[\log \left(\left(e^{a} \cdot e^{e}\right) \cdot \left(\left(e^{d} \cdot e^{c}\right) \cdot e^{b}\right)\right)\]
\left(\left(\left(e + d\right) + c\right) + b\right) + a
↓
\log \left(\left(e^{a} \cdot e^{e}\right) \cdot \left(\left(e^{d} \cdot e^{c}\right) \cdot e^{b}\right)\right)
double f(double a, double b, double c, double d, double e) {
        double r3786614 = e;
        double r3786615 = d;
        double r3786616 = r3786614 + r3786615;
        double r3786617 = c;
        double r3786618 = r3786616 + r3786617;
        double r3786619 = b;
        double r3786620 = r3786618 + r3786619;
        double r3786621 = a;
        double r3786622 = r3786620 + r3786621;
        return r3786622;
}
↓
double f(double a, double b, double c, double d, double e) {
        double r3786623 = a;
        double r3786624 = exp(r3786623);
        double r3786625 = e;
        double r3786626 = exp(r3786625);
        double r3786627 = r3786624 * r3786626;
        double r3786628 = d;
        double r3786629 = exp(r3786628);
        double r3786630 = c;
        double r3786631 = exp(r3786630);
        double r3786632 = r3786629 * r3786631;
        double r3786633 = b;
        double r3786634 = exp(r3786633);
        double r3786635 = r3786632 * r3786634;
        double r3786636 = r3786627 * r3786635;
        double r3786637 = log(r3786636);
        return r3786637;
}

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

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

  6. Applied sum-log0.4

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

  7. Applied sum-log0.3

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

  8. Simplified0.3

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

  10. Applied add-log-exp0.3

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

  11. Applied add-log-exp0.3

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

  12. Applied sum-log0.3

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

  13. Applied add-log-exp0.3

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

  14. Applied add-log-exp0.3

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

  15. Applied sum-log0.3

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

  16. Applied add-log-exp0.3

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

  17. Applied sum-log0.2

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

  18. Applied sum-log0.0

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

  19. Applied rem-exp-log0.0

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

  20. Final simplification0.0

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

Reproduce

herbie shell --seed 2019138 +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))