Average Error: 0.4 → 0.3
Time: 15.7s
Precision: 64
Internal Precision: 320
\[\left(\left(\left(e + d\right) + c\right) + b\right) + a\]
\[(\left(\sqrt{a + d}\right) \cdot \left(\sqrt{a + d}\right) + \left(e + \left(b + c\right)\right))_*\]

Error

Bits error versus a

Bits error versus b

Bits error versus c

Bits error versus d

Bits error versus e

Target

Original0.4
Target0.2
Herbie0.3
\[\left(d + \left(c + \left(a + b\right)\right)\right) + e\]

Derivation

  1. Initial program 0.4

    \[\left(\left(\left(e + d\right) + c\right) + b\right) + a\]
  2. Initial simplification0.2

    \[\leadsto \left(\left(a + d\right) + \left(c + b\right)\right) + e\]
  3. Using strategy rm
  4. Applied add-sqr-sqrt0.3

    \[\leadsto \left(\color{blue}{\sqrt{a + d} \cdot \sqrt{a + d}} + \left(c + b\right)\right) + e\]
  5. Applied fma-def0.3

    \[\leadsto \color{blue}{(\left(\sqrt{a + d}\right) \cdot \left(\sqrt{a + d}\right) + \left(c + b\right))_*} + e\]
  6. Using strategy rm
  7. Applied fma-udef0.3

    \[\leadsto \color{blue}{\left(\sqrt{a + d} \cdot \sqrt{a + d} + \left(c + b\right)\right)} + e\]
  8. Applied associate-+l+0.3

    \[\leadsto \color{blue}{\sqrt{a + d} \cdot \sqrt{a + d} + \left(\left(c + b\right) + e\right)}\]
  9. Simplified0.3

    \[\leadsto \color{blue}{\left(d + a\right)} + \left(\left(c + b\right) + e\right)\]
  10. Using strategy rm
  11. Applied add-sqr-sqrt0.3

    \[\leadsto \color{blue}{\sqrt{d + a} \cdot \sqrt{d + a}} + \left(\left(c + b\right) + e\right)\]
  12. Applied fma-def0.3

    \[\leadsto \color{blue}{(\left(\sqrt{d + a}\right) \cdot \left(\sqrt{d + a}\right) + \left(\left(c + b\right) + e\right))_*}\]
  13. Final simplification0.3

    \[\leadsto (\left(\sqrt{a + d}\right) \cdot \left(\sqrt{a + d}\right) + \left(e + \left(b + c\right)\right))_*\]

Runtime

Time bar (total: 15.7s)Debug logProfile

herbie shell --seed 2018248 +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))