Average Error: 58.1 → 33.8
Time: 46.1s
Precision: 64
Internal Precision: 128
\[\frac{c0}{2 \cdot w} \cdot \left(\frac{c0 \cdot \left(d \cdot d\right)}{\left(w \cdot h\right) \cdot \left(D \cdot D\right)} + \sqrt{\frac{c0 \cdot \left(d \cdot d\right)}{\left(w \cdot h\right) \cdot \left(D \cdot D\right)} \cdot \frac{c0 \cdot \left(d \cdot d\right)}{\left(w \cdot h\right) \cdot \left(D \cdot D\right)} - M \cdot M}\right)\]
↓
\[0\]

Error

Bits error versus c0

Bits error versus w

Bits error versus h

Bits error versus D

Bits error versus d

Bits error versus M

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Derivation

  1. Initial program 58.1

    \[\frac{c0}{2 \cdot w} \cdot \left(\frac{c0 \cdot \left(d \cdot d\right)}{\left(w \cdot h\right) \cdot \left(D \cdot D\right)} + \sqrt{\frac{c0 \cdot \left(d \cdot d\right)}{\left(w \cdot h\right) \cdot \left(D \cdot D\right)} \cdot \frac{c0 \cdot \left(d \cdot d\right)}{\left(w \cdot h\right) \cdot \left(D \cdot D\right)} - M \cdot M}\right)\]

  2. Taylor expanded around -inf 35.8

    \[\leadsto \frac{c0}{2 \cdot w} \cdot \color{blue}{0}\]
  3. Using strategy rm

  4. Applied mul033.8

    \[\leadsto \color{blue}{0}\]

  5. Final simplification33.8

    \[\leadsto 0\]

Reproduce

herbie shell --seed 2019005 +o rules:numerics
(FPCore (c0 w h D d M)
  :name "Henrywood and Agarwal, Equation (13)"
  (* (/ c0 (* 2 w)) (+ (/ (* c0 (* d d)) (* (* w h) (* D D))) (sqrt (- (* (/ (* c0 (* d d)) (* (* w h) (* D D))) (/ (* c0 (* d d)) (* (* w h) (* D D)))) (* M M))))))

Details

Time bar (total: 45.0s)Debug log

sample611.0ms

Algorithm
intervals

simplify358.0ms

Counts
1 → 1
Calls

1 calls. Slowest were:

358.0ms
(* (/ c0 (* 2 w)) (+ (/ (* c0 (* d d)) (* (* w h) (* D D))) (sqrt (- (* (/ (* c0 (* d d)) (* (* w h) (* D D))) (/ (* c0 (* d d)) (* (* w h) (* D D)))) (* M M)))))

prune10.0ms

Pruning

1 alts after pruning (1 fresh and 0 done)

Merged error: 59.4b

localize45.0ms

Local error

Found 4 expressions with local error:

29.7b
(+ (/ (* c0 (* d d)) (* (* w h) (* D D))) (sqrt (- (* (/ (* c0 (* d d)) (* (* w h) (* D D))) (/ (* c0 (* d d)) (* (* w h) (* D D)))) (* M M))))
15.6b
(/ (* c0 (* d d)) (* (* w h) (* D D)))
15.6b
(/ (* c0 (* d d)) (* (* w h) (* D D)))
15.6b
(/ (* c0 (* d d)) (* (* w h) (* D D)))

rewrite60.0ms

Algorithm
rewrite-expression-head
Counts
4 → 78
Calls

4 calls. Slowest were:

43.0ms
(+ (/ (* c0 (* d d)) (* (* w h) (* D D))) (sqrt (- (* (/ (* c0 (* d d)) (* (* w h) (* D D))) (/ (* c0 (* d d)) (* (* w h) (* D D)))) (* M M))))
5.0ms
(/ (* c0 (* d d)) (* (* w h) (* D D)))
5.0ms
(/ (* c0 (* d d)) (* (* w h) (* D D)))

series330.0ms

Counts
4 → 12
Calls

4 calls. Slowest were:

158.0ms
(+ (/ (* c0 (* d d)) (* (* w h) (* D D))) (sqrt (- (* (/ (* c0 (* d d)) (* (* w h) (* D D))) (/ (* c0 (* d d)) (* (* w h) (* D D)))) (* M M))))
58.0ms
(/ (* c0 (* d d)) (* (* w h) (* D D)))
58.0ms
(/ (* c0 (* d d)) (* (* w h) (* D D)))
57.0ms
(/ (* c0 (* d d)) (* (* w h) (* D D)))

simplify9.3s

Counts
43 → 90
Calls

43 calls. Slowest were:

657.0ms
(/ (* (* (* c0 (* d d)) (* c0 (* d d))) (* c0 (* d d))) (* (* (* (* w h) (* D D)) (* (* w h) (* D D))) (* (* w h) (* D D))))
596.0ms
(+ (* (* c0 (* d d)) (sqrt (+ (* (* (/ (* c0 (* d d)) (* (* w h) (* D D))) (/ (* c0 (* d d)) (* (* w h) (* D D)))) (* (/ (* c0 (* d d)) (* (* w h) (* D D))) (/ (* c0 (* d d)) (* (* w h) (* D D))))) (+ (* (* M M) (* M M)) (* (* (/ (* c0 (* d d)) (* (* w h) (* D D))) (/ (* c0 (* d d)) (* (* w h) (* D D)))) (* M M)))))) (* (* (* w h) (* D D)) (sqrt (- (pow (* (/ (* c0 (* d d)) (* (* w h) (* D D))) (/ (* c0 (* d d)) (* (* w h) (* D D)))) 3) (pow (* M M) 3)))))
581.0ms
(* (* (* w h) (* D D)) (sqrt (+ (* (* (/ (* c0 (* d d)) (* (* w h) (* D D))) (/ (* c0 (* d d)) (* (* w h) (* D D)))) (* (/ (* c0 (* d d)) (* (* w h) (* D D))) (/ (* c0 (* d d)) (* (* w h) (* D D))))) (+ (* (* M M) (* M M)) (* (* (/ (* c0 (* d d)) (* (* w h) (* D D))) (/ (* c0 (* d d)) (* (* w h) (* D D)))) (* M M))))))

prune1.2s

Pruning

8 alts after pruning (8 fresh and 0 done)

Merged error: 36.6b

localize3.0ms

Local error

Found 1 expressions with local error:

6.6b
(* (/ c0 (* 2 w)) 0)

rewrite2.0ms

Algorithm
rewrite-expression-head
Counts
1 → 16
Calls

1 calls. Slowest were:

2.0ms
(* (/ c0 (* 2 w)) 0)

series2.0ms

Counts
1 → 3
Calls

1 calls. Slowest were:

2.0ms
(* (/ c0 (* 2 w)) 0)

simplify9.0ms

Counts
6 → 19
Calls

6 calls. Slowest were:

4.0ms
(* (cbrt (/ c0 (* 2 w))) (cbrt (/ c0 (* 2 w))))
2.0ms
(sqrt (/ c0 (* 2 w)))
1.0ms
(* c0 0)

prune162.0ms

Pruning

8 alts after pruning (8 fresh and 0 done)

Merged error: 34.3b

localize0.0ms

Local error

Found 0 expressions with local error:

rewrite0.0ms

Algorithm
rewrite-expression-head
Counts
0 → 0
Calls

0 calls. Slowest were:

series0.0ms

Counts
0 → 0
Calls

0 calls. Slowest were:

simplify0.0ms

Counts
0 → 0
Calls

0 calls. Slowest were:

prune35.0ms

Pruning

8 alts after pruning (7 fresh and 1 done)

Merged error: 34.3b

localize38.0ms

Local error

Found 4 expressions with local error:

29.7b
(+ (* (* (/ d D) (/ d D)) (/ (/ c0 h) w)) (sqrt (fma (* (* (/ d D) (/ d D)) (/ (/ c0 h) w)) (* (* (/ d D) (/ d D)) (/ (/ c0 h) w)) (* (- M) M))))
13.7b
(* (* (/ d D) (/ d D)) (/ (/ c0 h) w))
13.7b
(* (* (/ d D) (/ d D)) (/ (/ c0 h) w))
13.7b
(* (* (/ d D) (/ d D)) (/ (/ c0 h) w))

rewrite36.0ms

Algorithm
rewrite-expression-head
Counts
4 → 98
Calls

4 calls. Slowest were:

9.0ms
(+ (* (* (/ d D) (/ d D)) (/ (/ c0 h) w)) (sqrt (fma (* (* (/ d D) (/ d D)) (/ (/ c0 h) w)) (* (* (/ d D) (/ d D)) (/ (/ c0 h) w)) (* (- M) M))))
9.0ms
(* (* (/ d D) (/ d D)) (/ (/ c0 h) w))
9.0ms
(* (* (/ d D) (/ d D)) (/ (/ c0 h) w))

series299.0ms

Counts
4 → 12
Calls

4 calls. Slowest were:

177.0ms
(+ (* (* (/ d D) (/ d D)) (/ (/ c0 h) w)) (sqrt (fma (* (* (/ d D) (/ d D)) (/ (/ c0 h) w)) (* (* (/ d D) (/ d D)) (/ (/ c0 h) w)) (* (- M) M))))
41.0ms
(* (* (/ d D) (/ d D)) (/ (/ c0 h) w))
40.0ms
(* (* (/ d D) (/ d D)) (/ (/ c0 h) w))
40.0ms
(* (* (/ d D) (/ d D)) (/ (/ c0 h) w))

simplify8.2s

Counts
74 → 110
Calls

74 calls. Slowest were:

406.0ms
(/ (* c0 (pow d 2)) (* w (* (pow D 2) h)))
368.0ms
(* (exp (* (* (/ d D) (/ d D)) (/ (/ c0 h) w))) (exp (sqrt (fma (* (* (/ d D) (/ d D)) (/ (/ c0 h) w)) (* (* (/ d D) (/ d D)) (/ (/ c0 h) w)) (* (- M) M)))))
363.0ms
(/ (* c0 (pow d 2)) (* w (* (pow D 2) h)))

prune2.3s

Pruning

8 alts after pruning (7 fresh and 1 done)

Merged error: 34.3b

regimes985.0ms

Accuracy

0% (2.8b remaining)

Error of 33.8b against oracle of 31.0b and baseline of 33.8b

bsearch0.0ms

end0.0ms

sample21.2s

Algorithm
intervals