Average Error: 49.2 → 49.2
Time: 1.1s
Precision: 64
Internal Precision: 128
\[1.7 \cdot 10^{+308} \cdot t - 1.7 \cdot 10^{+308}\]
↓
\[1.7 \cdot 10^{+308} \cdot t - 1.7 \cdot 10^{+308}\]

Error

Bits error versus t

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Your Program's Arguments

Results

Enter valid numbers for all inputs

Target

Original49.2
Target0
Herbie49.2
\[(\left( 1.7 \cdot 10^{+308} \right) \cdot t + \left(-1.7 \cdot 10^{+308}\right))_*\]

Derivation

  1. Initial program 49.2

    \[1.7 \cdot 10^{+308} \cdot t - 1.7 \cdot 10^{+308}\]

  2. Final simplification49.2

    \[\leadsto 1.7 \cdot 10^{+308} \cdot t - 1.7 \cdot 10^{+308}\]

Reproduce

herbie shell --seed 2019007 
(FPCore (t)
  :name "fma_test2"
  :pre (<= 1.9 t 2.1)

  :herbie-target
  (fma 1.7e+308 t (- 1.7e+308))

  (- (* 1.7e+308 t) 1.7e+308))

Details

Time bar (total: 874.0ms)Debug log

sample33.0ms

Algorithm
intervals

simplify7.0ms

Counts
1 → 1
Calls

1 calls. Slowest were:

7.0ms
(- (* 1.7e+308 t) 1.7e+308)

prune6.0ms

Pruning

1 alts after pruning (1 fresh and 0 done)

Merged error: 49.2b

localize11.0ms

Local error

Found 1 expressions with local error:

49.2b
(- (* 1.7e+308 t) 1.7e+308)

rewrite3.0ms

Algorithm
rewrite-expression-head
Counts
1 → 11
Calls

1 calls. Slowest were:

3.0ms
(- (* 1.7e+308 t) 1.7e+308)

series35.0ms

Counts
1 → 3
Calls

1 calls. Slowest were:

35.0ms
(- (* 1.7e+308 t) 1.7e+308)

simplify21.0ms

Counts
3 → 14
Calls

3 calls. Slowest were:

7.0ms
(- (* 1.7e+308 t) 1.7e+308)
7.0ms
(- (* 1.7e+308 t) 1.7e+308)
6.0ms
(- (* 1.7e+308 t) 1.7e+308)

prune79.0ms

Pruning

1 alts after pruning (0 fresh and 1 done)

Merged error: 49.2b

end0.0ms

sample677.0ms

Algorithm
intervals