Error

Target

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

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

12. Applied exp-sum0.3

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

14. Applied exp-sum0.1

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

15. Applied associate-*l*0.1

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

17. Applied exp-sum0.0

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

18. Applied associate-*r*0.1

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

19. Final simplification0.1

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

Reproduce

herbie shell --seed 2019090 
(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))