


Bits error versus alpha



Bits error versus beta



Bits error versus i
Initial program 52.5
rmApplied associate-/l*38.8
rmApplied add-sqr-sqrt38.8
Applied div-inv38.8
Applied times-frac38.9
Simplified38.9
Simplified38.9
Final simplification38.9
herbie shell --seed 2019022 +o rules:numerics
(FPCore (alpha beta i)
:name "Octave 3.8, jcobi/4"
:pre (and (> alpha -1) (> beta -1) (> i 1))
(/ (/ (* (* i (+ (+ alpha beta) i)) (+ (* beta alpha) (* i (+ (+ alpha beta) i)))) (* (+ (+ alpha beta) (* 2 i)) (+ (+ alpha beta) (* 2 i)))) (- (* (+ (+ alpha beta) (* 2 i)) (+ (+ alpha beta) (* 2 i))) 1.0)))
Time bar (total: 2.0m)Debug log
| 48.0ms | 256× | body | 80 | valid |
| 10.0ms | 256× | pre | 80 | true |
| 251.0ms | (/ (/ (* (* i (+ (+ alpha beta) i)) (+ (* beta alpha) (* i (+ (+ alpha beta) i)))) (* (+ (+ alpha beta) (* 2 i)) (+ (+ alpha beta) (* 2 i)))) (- (* (+ (+ alpha beta) (* 2 i)) (+ (+ alpha beta) (* 2 i))) 1.0)) |
1 alts after pruning (1 fresh and 0 done)
Merged error: 51.8b
Found 4 expressions with local error:
| 45.4b | (/ (* (* i (+ (+ alpha beta) i)) (+ (* beta alpha) (* i (+ (+ alpha beta) i)))) (* (+ (+ alpha beta) (* 2 i)) (+ (+ alpha beta) (* 2 i)))) |
| 37.0b | (/ (/ (* (* i (+ (+ alpha beta) i)) (+ (* beta alpha) (* i (+ (+ alpha beta) i)))) (* (+ (+ alpha beta) (* 2 i)) (+ (+ alpha beta) (* 2 i)))) (- (* (+ (+ alpha beta) (* 2 i)) (+ (+ alpha beta) (* 2 i))) 1.0)) |
| 0.1b | (* (* i (+ (+ alpha beta) i)) (+ (* beta alpha) (* i (+ (+ alpha beta) i)))) |
| 0.0b | (* (+ (+ alpha beta) (* 2 i)) (+ (+ alpha beta) (* 2 i))) |
| 48× | flip-+ |
| 48× | flip3-+ |
| 44× | times-frac |
| 42× | associate-/r/ |
| 38× | add-exp-log |
| 38× | add-cbrt-cube |
| 32× | frac-times |
| 28× | associate-*r/ |
| 25× | add-cube-cbrt |
| 25× | *-un-lft-identity |
| 25× | add-sqr-sqrt |
| 16× | associate-*l/ |
| 14× | associate-/l* |
| 13× | div-exp |
| 13× | cbrt-undiv |
| 11× | pow1 |
| 10× | cbrt-unprod |
| 10× | prod-exp |
| 9× | associate-/l/ |
| 6× | div-inv |
| 6× | associate-*r* |
| 4× | add-log-exp |
| 4× | log1p-expm1-u |
| 4× | associate-*l* |
| 4× | associate-/r* |
| 4× | expm1-log1p-u |
| 2× | *-commutative |
| 2× | pow-prod-down |
| 2× | distribute-lft-in |
| 2× | frac-2neg |
| 2× | clear-num |
| 2× | distribute-rgt-in |
| 1× | flip-- |
| 1× | pow-prod-up |
| 1× | flip3-- |
| 1× | pow-plus |
| 1× | pow2 |
| 60.0ms | (/ (/ (* (* i (+ (+ alpha beta) i)) (+ (* beta alpha) (* i (+ (+ alpha beta) i)))) (* (+ (+ alpha beta) (* 2 i)) (+ (+ alpha beta) (* 2 i)))) (- (* (+ (+ alpha beta) (* 2 i)) (+ (+ alpha beta) (* 2 i))) 1.0)) |
| 21.0ms | (/ (* (* i (+ (+ alpha beta) i)) (+ (* beta alpha) (* i (+ (+ alpha beta) i)))) (* (+ (+ alpha beta) (* 2 i)) (+ (+ alpha beta) (* 2 i)))) |
| 15.0ms | (* (* i (+ (+ alpha beta) i)) (+ (* beta alpha) (* i (+ (+ alpha beta) i)))) |
| 11.0ms | (* (+ (+ alpha beta) (* 2 i)) (+ (+ alpha beta) (* 2 i))) |
| 777.0ms | (/ (/ (* (* i (+ (+ alpha beta) i)) (+ (* beta alpha) (* i (+ (+ alpha beta) i)))) (* (+ (+ alpha beta) (* 2 i)) (+ (+ alpha beta) (* 2 i)))) (- (* (+ (+ alpha beta) (* 2 i)) (+ (+ alpha beta) (* 2 i))) 1.0)) |
| 163.0ms | (/ (* (* i (+ (+ alpha beta) i)) (+ (* beta alpha) (* i (+ (+ alpha beta) i)))) (* (+ (+ alpha beta) (* 2 i)) (+ (+ alpha beta) (* 2 i)))) |
| 84.0ms | (* (* i (+ (+ alpha beta) i)) (+ (* beta alpha) (* i (+ (+ alpha beta) i)))) |
| 54.0ms | (* (+ (+ alpha beta) (* 2 i)) (+ (+ alpha beta) (* 2 i))) |
| 798.0ms | (* (* i (+ (+ alpha beta) i)) (* i (+ (+ alpha beta) i))) |
| 797.0ms | (* (* i (+ (+ alpha beta) i)) (* i (+ (+ alpha beta) i))) |
| 732.0ms | (* (- (* (+ alpha beta) (+ alpha beta)) (* (* 2 i) (* 2 i))) (- (* (+ alpha beta) (+ alpha beta)) (* (* 2 i) (* 2 i)))) |
| 647.0ms | (/ (* (- (+ alpha beta) (* 2 i)) (+ (* (+ alpha beta) (+ alpha beta)) (- (* (* 2 i) (* 2 i)) (* (+ alpha beta) (* 2 i))))) (- (* (+ (+ alpha beta) (* 2 i)) (+ (+ alpha beta) (* 2 i))) 1.0)) |
| 616.0ms | (cbrt (- (* (+ (+ alpha beta) (* 2 i)) (+ (+ alpha beta) (* 2 i))) 1.0)) |
9 alts after pruning (9 fresh and 0 done)
Merged error: 36.9b
Found 4 expressions with local error:
| 38.8b | (/ (* (+ (+ alpha beta) (* 2 i)) (+ (+ alpha beta) (* 2 i))) (+ (* beta alpha) (* i (+ (+ alpha beta) i)))) |
| 37.0b | (/ (/ (* i (+ (+ alpha beta) i)) (/ (* (+ (+ alpha beta) (* 2 i)) (+ (+ alpha beta) (* 2 i))) (+ (* beta alpha) (* i (+ (+ alpha beta) i))))) (- (* (+ (+ alpha beta) (* 2 i)) (+ (+ alpha beta) (* 2 i))) 1.0)) |
| 2.4b | (/ (* i (+ (+ alpha beta) i)) (/ (* (+ (+ alpha beta) (* 2 i)) (+ (+ alpha beta) (* 2 i))) (+ (* beta alpha) (* i (+ (+ alpha beta) i))))) |
| 0.0b | (* (+ (+ alpha beta) (* 2 i)) (+ (+ alpha beta) (* 2 i))) |
| 108× | times-frac |
| 39× | add-cube-cbrt |
| 39× | *-un-lft-identity |
| 39× | add-sqr-sqrt |
| 34× | add-exp-log |
| 34× | add-cbrt-cube |
| 21× | associate-/r/ |
| 20× | flip-+ |
| 20× | flip3-+ |
| 16× | associate-/l* |
| 16× | div-exp |
| 16× | cbrt-undiv |
| 15× | associate-/r* |
| 13× | div-inv |
| 11× | associate-/l/ |
| 9× | pow1 |
| 8× | frac-times |
| 6× | associate-*r/ |
| 4× | add-log-exp |
| 4× | log1p-expm1-u |
| 4× | cbrt-unprod |
| 4× | prod-exp |
| 4× | associate-*l/ |
| 4× | expm1-log1p-u |
| 3× | associate-*l* |
| 3× | associate-*r* |
| 3× | frac-2neg |
| 3× | clear-num |
| 1× | flip-- |
| 1× | pow-prod-up |
| 1× | *-commutative |
| 1× | pow-prod-down |
| 1× | flip3-- |
| 1× | pow-plus |
| 1× | distribute-lft-in |
| 1× | distribute-rgt-in |
| 1× | pow2 |
| 28.0ms | (/ (/ (* i (+ (+ alpha beta) i)) (/ (* (+ (+ alpha beta) (* 2 i)) (+ (+ alpha beta) (* 2 i))) (+ (* beta alpha) (* i (+ (+ alpha beta) i))))) (- (* (+ (+ alpha beta) (* 2 i)) (+ (+ alpha beta) (* 2 i))) 1.0)) |
| 19.0ms | (* (+ (+ alpha beta) (* 2 i)) (+ (+ alpha beta) (* 2 i))) |
| 17.0ms | (/ (* (+ (+ alpha beta) (* 2 i)) (+ (+ alpha beta) (* 2 i))) (+ (* beta alpha) (* i (+ (+ alpha beta) i)))) |
| 12.0ms | (/ (* i (+ (+ alpha beta) i)) (/ (* (+ (+ alpha beta) (* 2 i)) (+ (+ alpha beta) (* 2 i))) (+ (* beta alpha) (* i (+ (+ alpha beta) i))))) |
| 717.0ms | (/ (/ (* i (+ (+ alpha beta) i)) (/ (* (+ (+ alpha beta) (* 2 i)) (+ (+ alpha beta) (* 2 i))) (+ (* beta alpha) (* i (+ (+ alpha beta) i))))) (- (* (+ (+ alpha beta) (* 2 i)) (+ (+ alpha beta) (* 2 i))) 1.0)) |
| 162.0ms | (/ (* i (+ (+ alpha beta) i)) (/ (* (+ (+ alpha beta) (* 2 i)) (+ (+ alpha beta) (* 2 i))) (+ (* beta alpha) (* i (+ (+ alpha beta) i))))) |
| 140.0ms | (/ (* (+ (+ alpha beta) (* 2 i)) (+ (+ alpha beta) (* 2 i))) (+ (* beta alpha) (* i (+ (+ alpha beta) i)))) |
| 51.0ms | (* (+ (+ alpha beta) (* 2 i)) (+ (+ alpha beta) (* 2 i))) |
| 1.2s | (* (- (* (+ alpha beta) (+ alpha beta)) (* (* 2 i) (* 2 i))) (- (* (+ alpha beta) (+ alpha beta)) (* (* 2 i) (* 2 i)))) |
| 1.1s | (* (- (* (+ alpha beta) (+ alpha beta)) (* (* 2 i) (* 2 i))) (- (* (+ alpha beta) (+ alpha beta)) (* (* 2 i) (* 2 i)))) |
| 922.0ms | (/ (+ (* beta alpha) (* i (+ (+ alpha beta) i))) (cbrt (- (* (+ (+ alpha beta) (* 2 i)) (+ (+ alpha beta) (* 2 i))) 1.0))) |
| 874.0ms | (/ (/ i (* (+ (+ alpha beta) (* 2 i)) (+ (+ alpha beta) (* 2 i)))) 1) |
| 870.0ms | (* (+ (+ alpha beta) (* 2 i)) (- (* (+ alpha beta) (+ alpha beta)) (* (* 2 i) (* 2 i)))) |
7 alts after pruning (7 fresh and 0 done)
Merged error: 36.9b
Found 4 expressions with local error:
| 38.9b | (/ (fma (+ (+ i beta) alpha) i (* beta alpha)) (* (fma i 2 (+ alpha beta)) (fma i 2 (+ alpha beta)))) |
| 37.2b | (sqrt (fma (+ (fma 2 i alpha) beta) (+ (fma 2 i alpha) beta) (- 1.0))) |
| 37.2b | (sqrt (fma (fma i 2 (+ alpha beta)) (fma i 2 (+ alpha beta)) (- 1.0))) |
| 33.2b | (/ (fma (+ i beta) i (* i alpha)) (sqrt (fma (+ (fma 2 i alpha) beta) (+ (fma 2 i alpha) beta) (- 1.0)))) |
| 25× | add-sqr-sqrt |
| 23× | add-cube-cbrt |
| 23× | *-un-lft-identity |
| 21× | times-frac |
| 18× | sqrt-prod |
| 11× | add-exp-log |
| 11× | add-cbrt-cube |
| 7× | associate-/r* |
| 6× | associate-/l* |
| 4× | add-log-exp |
| 4× | log1p-expm1-u |
| 4× | pow1 |
| 4× | expm1-log1p-u |
| 3× | div-exp |
| 3× | cbrt-undiv |
| 2× | div-inv |
| 2× | pow1/2 |
| 2× | frac-2neg |
| 2× | clear-num |
| 2× | rem-sqrt-square |
| 1× | cbrt-unprod |
| 1× | prod-exp |
| 5.0ms | (/ (fma (+ (+ i beta) alpha) i (* beta alpha)) (* (fma i 2 (+ alpha beta)) (fma i 2 (+ alpha beta)))) |
| 4.0ms | (/ (fma (+ i beta) i (* i alpha)) (sqrt (fma (+ (fma 2 i alpha) beta) (+ (fma 2 i alpha) beta) (- 1.0)))) |
| 1.0ms | (sqrt (fma (+ (fma 2 i alpha) beta) (+ (fma 2 i alpha) beta) (- 1.0))) |
| 1.0ms | (sqrt (fma (fma i 2 (+ alpha beta)) (fma i 2 (+ alpha beta)) (- 1.0))) |
| 253.0ms | (/ (fma (+ i beta) i (* i alpha)) (sqrt (fma (+ (fma 2 i alpha) beta) (+ (fma 2 i alpha) beta) (- 1.0)))) |
| 108.0ms | (sqrt (fma (fma i 2 (+ alpha beta)) (fma i 2 (+ alpha beta)) (- 1.0))) |
| 101.0ms | (/ (fma (+ (+ i beta) alpha) i (* beta alpha)) (* (fma i 2 (+ alpha beta)) (fma i 2 (+ alpha beta)))) |
| 89.0ms | (sqrt (fma (+ (fma 2 i alpha) beta) (+ (fma 2 i alpha) beta) (- 1.0))) |
| 597.0ms | (sqrt (fma (fma i 2 (+ alpha beta)) (fma i 2 (+ alpha beta)) (- 1.0))) |
| 594.0ms | (sqrt (sqrt (fma (fma i 2 (+ alpha beta)) (fma i 2 (+ alpha beta)) (- 1.0)))) |
| 484.0ms | (sqrt (* (cbrt (fma (fma i 2 (+ alpha beta)) (fma i 2 (+ alpha beta)) (- 1.0))) (cbrt (fma (fma i 2 (+ alpha beta)) (fma i 2 (+ alpha beta)) (- 1.0))))) |
| 411.0ms | (/ (* (* (fma (+ i beta) i (* i alpha)) (fma (+ i beta) i (* i alpha))) (fma (+ i beta) i (* i alpha))) (* (* (sqrt (fma (+ (fma 2 i alpha) beta) (+ (fma 2 i alpha) beta) (- 1.0))) (sqrt (fma (+ (fma 2 i alpha) beta) (+ (fma 2 i alpha) beta) (- 1.0)))) (sqrt (fma (+ (fma 2 i alpha) beta) (+ (fma 2 i alpha) beta) (- 1.0))))) |
| 410.0ms | (- (log (fma (+ (+ i beta) alpha) i (* beta alpha))) (log (* (fma i 2 (+ alpha beta)) (fma i 2 (+ alpha beta))))) |
7 alts after pruning (6 fresh and 1 done)
Merged error: 36.9b
Found 4 expressions with local error:
| 38.9b | (/ (fma (+ (+ i beta) alpha) i (* beta alpha)) (* (fma i 2 (+ alpha beta)) (fma i 2 (+ alpha beta)))) |
| 38.9b | (/ (fma (+ (+ i beta) alpha) i (* beta alpha)) (* (fma i 2 (+ alpha beta)) (fma i 2 (+ alpha beta)))) |
| 38.9b | (/ (fma (+ (+ i beta) alpha) i (* beta alpha)) (* (fma i 2 (+ alpha beta)) (fma i 2 (+ alpha beta)))) |
| 37.2b | (sqrt (fma (+ (fma 2 i alpha) beta) (+ (fma 2 i alpha) beta) (- 1.0))) |
| 19× | add-exp-log |
| 19× | add-cbrt-cube |
| 12× | add-sqr-sqrt |
| 11× | add-cube-cbrt |
| 11× | *-un-lft-identity |
| 9× | associate-/l* |
| 9× | times-frac |
| 6× | div-exp |
| 6× | cbrt-undiv |
| 4× | add-log-exp |
| 4× | log1p-expm1-u |
| 4× | pow1 |
| 4× | expm1-log1p-u |
| 3× | div-inv |
| 3× | cbrt-unprod |
| 3× | sqrt-prod |
| 3× | prod-exp |
| 3× | frac-2neg |
| 3× | associate-/r* |
| 3× | clear-num |
| 1× | pow1/2 |
| 1× | rem-sqrt-square |
| 14.0ms | (/ (fma (+ (+ i beta) alpha) i (* beta alpha)) (* (fma i 2 (+ alpha beta)) (fma i 2 (+ alpha beta)))) |
| 10.0ms | (/ (fma (+ (+ i beta) alpha) i (* beta alpha)) (* (fma i 2 (+ alpha beta)) (fma i 2 (+ alpha beta)))) |
| 6.0ms | (/ (fma (+ (+ i beta) alpha) i (* beta alpha)) (* (fma i 2 (+ alpha beta)) (fma i 2 (+ alpha beta)))) |
| 1.0ms | (sqrt (fma (+ (fma 2 i alpha) beta) (+ (fma 2 i alpha) beta) (- 1.0))) |
| 111.0ms | (sqrt (fma (+ (fma 2 i alpha) beta) (+ (fma 2 i alpha) beta) (- 1.0))) |
| 75.0ms | (/ (fma (+ (+ i beta) alpha) i (* beta alpha)) (* (fma i 2 (+ alpha beta)) (fma i 2 (+ alpha beta)))) |
| 74.0ms | (/ (fma (+ (+ i beta) alpha) i (* beta alpha)) (* (fma i 2 (+ alpha beta)) (fma i 2 (+ alpha beta)))) |
| 61.0ms | (/ (fma (+ (+ i beta) alpha) i (* beta alpha)) (* (fma i 2 (+ alpha beta)) (fma i 2 (+ alpha beta)))) |
| 429.0ms | (- (log (fma (+ (+ i beta) alpha) i (* beta alpha))) (log (* (fma i 2 (+ alpha beta)) (fma i 2 (+ alpha beta))))) |
| 395.0ms | (- (log (fma (+ (+ i beta) alpha) i (* beta alpha))) (log (* (fma i 2 (+ alpha beta)) (fma i 2 (+ alpha beta))))) |
| 389.0ms | (- (log (fma (+ (+ i beta) alpha) i (* beta alpha))) (log (* (fma i 2 (+ alpha beta)) (fma i 2 (+ alpha beta))))) |
| 311.0ms | (+ (* 2 (* (sqrt -1.0) (* i alpha))) (+ (sqrt (- 1.0)) (* 2 (* (sqrt -1.0) (pow i 2))))) |
| 172.0ms | (- (log (fma (+ (+ i beta) alpha) i (* beta alpha))) (+ (log (fma i 2 (+ alpha beta))) (log (fma i 2 (+ alpha beta))))) |
7 alts after pruning (5 fresh and 2 done)
Merged error: 36.9b
0% (2.8b remaining)
Error of 38.9b against oracle of 36.1b and baseline of 38.9b
| 1.9s | 8000× | body | 80 | valid |
| 315.0ms | 8000× | pre | 80 | true |