Average Error: 61.9 → 0
Time: 15.3s
Precision: 64
Internal Precision: 1088
\[\Re(\left(\left(\left(\left(\left(\left(\left(\left(\frac{-1}{2} + \frac{\sqrt{3}}{2} i\right) \cdot \left(\frac{-1}{2} + \frac{\sqrt{3}}{2} i\right)\right) \cdot \left(\frac{-1}{2} + \frac{\sqrt{3}}{2} i\right)\right) \cdot \left(\frac{-1}{2} + \frac{\sqrt{3}}{2} i\right)\right) + \left(\left(\left(\left(\left(-2\right) + 0 i\right) \cdot \left(\frac{-1}{2} + \frac{\sqrt{3}}{2} i\right)\right) \cdot \left(\frac{-1}{2} + \frac{\sqrt{3}}{2} i\right)\right) \cdot \left(\frac{-1}{2} + \frac{\sqrt{3}}{2} i\right)\right)\right) + \left(\left(\left(5 + 0 i\right) \cdot \left(\frac{-1}{2} + \frac{\sqrt{3}}{2} i\right)\right) \cdot \left(\frac{-1}{2} + \frac{\sqrt{3}}{2} i\right)\right)\right) + \left(\left(4 + 0 i\right) \cdot \left(\frac{-1}{2} + \frac{\sqrt{3}}{2} i\right)\right)\right) + \left(7 + 0 i\right)\right))\]
↓
\[\Re(\left(\left(\left(\left(\frac{-1}{2} + \frac{\sqrt{3}}{2} i\right) \cdot \left(\frac{-1}{2} + \frac{\sqrt{3}}{2} i\right)\right) \cdot \left(\left(\left(\frac{-1}{2} + \frac{\sqrt{3}}{2} i\right) \cdot \left(\frac{-1}{2} + \frac{\sqrt{3}}{2} i\right)\right) + \left(6 + \frac{\sqrt{3} \cdot -2}{2} i\right)\right)\right) + \left(5 + \frac{\sqrt{3} \cdot 4}{2} i\right)\right))\]

Error

Derivation

  1. Initial program 61.9

    \[\Re(\left(\left(\left(\left(\left(\left(\left(\left(\frac{-1}{2} + \frac{\sqrt{3}}{2} i\right) \cdot \left(\frac{-1}{2} + \frac{\sqrt{3}}{2} i\right)\right) \cdot \left(\frac{-1}{2} + \frac{\sqrt{3}}{2} i\right)\right) \cdot \left(\frac{-1}{2} + \frac{\sqrt{3}}{2} i\right)\right) + \left(\left(\left(\left(\left(-2\right) + 0 i\right) \cdot \left(\frac{-1}{2} + \frac{\sqrt{3}}{2} i\right)\right) \cdot \left(\frac{-1}{2} + \frac{\sqrt{3}}{2} i\right)\right) \cdot \left(\frac{-1}{2} + \frac{\sqrt{3}}{2} i\right)\right)\right) + \left(\left(\left(5 + 0 i\right) \cdot \left(\frac{-1}{2} + \frac{\sqrt{3}}{2} i\right)\right) \cdot \left(\frac{-1}{2} + \frac{\sqrt{3}}{2} i\right)\right)\right) + \left(\left(4 + 0 i\right) \cdot \left(\frac{-1}{2} + \frac{\sqrt{3}}{2} i\right)\right)\right) + \left(7 + 0 i\right)\right))\]

  2. Simplified0

    \[\leadsto \color{blue}{\Re(\left(\left(5 + \frac{4 \cdot \sqrt{3}}{2} i\right) + \left(\left(\left(\frac{-1}{2} + \frac{\sqrt{3}}{2} i\right) \cdot \left(\frac{-1}{2} + \frac{\sqrt{3}}{2} i\right)\right) \cdot \left(\left(6 + \frac{\sqrt{3} \cdot -2}{2} i\right) + \left(\left(\frac{-1}{2} + \frac{\sqrt{3}}{2} i\right) \cdot \left(\frac{-1}{2} + \frac{\sqrt{3}}{2} i\right)\right)\right)\right)\right))}\]

  3. Final simplification0

    \[\leadsto \Re(\left(\left(\left(\left(\frac{-1}{2} + \frac{\sqrt{3}}{2} i\right) \cdot \left(\frac{-1}{2} + \frac{\sqrt{3}}{2} i\right)\right) \cdot \left(\left(\left(\frac{-1}{2} + \frac{\sqrt{3}}{2} i\right) \cdot \left(\frac{-1}{2} + \frac{\sqrt{3}}{2} i\right)\right) + \left(6 + \frac{\sqrt{3} \cdot -2}{2} i\right)\right)\right) + \left(5 + \frac{\sqrt{3} \cdot 4}{2} i\right)\right))\]

Reproduce

herbie shell --seed 2019005 +o rules:numerics
(FPCore ()
  :name "3.9.2 real part (p56)"
  (re (+.c (+.c (+.c (+.c (*.c (*.c (*.c (complex (/ (- 1) 2) (/ (sqrt 3) 2)) (complex (/ (- 1) 2) (/ (sqrt 3) 2))) (complex (/ (- 1) 2) (/ (sqrt 3) 2))) (complex (/ (- 1) 2) (/ (sqrt 3) 2))) (*.c (*.c (*.c (complex (- 2) 0) (complex (/ (- 1) 2) (/ (sqrt 3) 2))) (complex (/ (- 1) 2) (/ (sqrt 3) 2))) (complex (/ (- 1) 2) (/ (sqrt 3) 2)))) (*.c (*.c (complex 5 0) (complex (/ (- 1) 2) (/ (sqrt 3) 2))) (complex (/ (- 1) 2) (/ (sqrt 3) 2)))) (*.c (complex 4 0) (complex (/ (- 1) 2) (/ (sqrt 3) 2)))) (complex 7 0))))

Details

Time bar (total: 13.6s)Debug log

sample749.0ms

Algorithm
halfpoints

simplify557.0ms

Counts
1 → 1
Calls

1 calls. Slowest were:

557.0ms
(re (+.c (+.c (+.c (+.c (*.c (*.c (*.c (complex (/ (- 1) 2) (/ (sqrt 3) 2)) (complex (/ (- 1) 2) (/ (sqrt 3) 2))) (complex (/ (- 1) 2) (/ (sqrt 3) 2))) (complex (/ (- 1) 2) (/ (sqrt 3) 2))) (*.c (*.c (*.c (complex (- 2) 0) (complex (/ (- 1) 2) (/ (sqrt 3) 2))) (complex (/ (- 1) 2) (/ (sqrt 3) 2))) (complex (/ (- 1) 2) (/ (sqrt 3) 2)))) (*.c (*.c (complex 5 0) (complex (/ (- 1) 2) (/ (sqrt 3) 2))) (complex (/ (- 1) 2) (/ (sqrt 3) 2)))) (*.c (complex 4 0) (complex (/ (- 1) 2) (/ (sqrt 3) 2)))) (complex 7 0)))

prune20.0ms

Pruning

1 alts after pruning (1 fresh and 0 done)

Merged error: 0b

localize121.0ms

Local error

Found 2 expressions with local error:

1.6b
(*.c (complex -1/2 (/ (sqrt 3) 2)) (complex -1/2 (/ (sqrt 3) 2)))
1.6b
(*.c (complex -1/2 (/ (sqrt 3) 2)) (complex -1/2 (/ (sqrt 3) 2)))

rewrite4.0ms

Algorithm
rewrite-expression-head
Counts
2 → 4
Calls

2 calls. Slowest were:

2.0ms
(*.c (complex -1/2 (/ (sqrt 3) 2)) (complex -1/2 (/ (sqrt 3) 2)))
2.0ms
(*.c (complex -1/2 (/ (sqrt 3) 2)) (complex -1/2 (/ (sqrt 3) 2)))

series0.0ms

Counts
2 → 2
Calls

2 calls. Slowest were:

0.0ms
(*.c (complex -1/2 (/ (sqrt 3) 2)) (complex -1/2 (/ (sqrt 3) 2)))
0.0ms
(*.c (complex -1/2 (/ (sqrt 3) 2)) (complex -1/2 (/ (sqrt 3) 2)))

simplify579.0ms

Counts
6 → 6
Calls

6 calls. Slowest were:

207.0ms
(re (+.c (complex 5 (/ (* 4 (sqrt 3)) 2)) (*.c (*.c (complex -1/2 (/ (sqrt 3) 2)) (complex -1/2 (/ (sqrt 3) 2))) (+.c (complex 6 (/ (* (sqrt 3) -2) 2)) (*.c (complex -1/2 (/ (sqrt 3) 2)) (complex -1/2 (/ (sqrt 3) 2)))))))
194.0ms
(re (+.c (complex 5 (/ (* 4 (sqrt 3)) 2)) (*.c (*.c (complex -1/2 (/ (sqrt 3) 2)) (complex -1/2 (/ (sqrt 3) 2))) (+.c (complex 6 (/ (* (sqrt 3) -2) 2)) (*.c (complex -1/2 (/ (sqrt 3) 2)) (complex -1/2 (/ (sqrt 3) 2)))))))
65.0ms
(- (* -1/2 -1/2) (* (/ (sqrt 3) 2) (/ (sqrt 3) 2)))

prune55.0ms

Pruning

1 alts after pruning (0 fresh and 1 done)

Merged error: 0b

end0.0ms

sample11.5s

Algorithm
halfpoints