25.646 * [progress]: [Phase 1 of 3] Setting up.
0.002 * * * [progress]: [1/2] Preparing points
0.036 * * * [progress]: [2/2] Setting up program.
0.042 * [progress]: [Phase 2 of 3] Improving.
0.042 * [simplify]: Simplifying:
  (- (* x x) (* y y))
0.042 * * [simplify]: iteration 0: 5 enodes
0.044 * * [simplify]: iteration 1: 11 enodes
0.048 * * [simplify]: iteration 2: 18 enodes
0.052 * * [simplify]: iteration 3: 35 enodes
0.067 * * [simplify]: iteration 4: 67 enodes
0.099 * * [simplify]: iteration 5: 160 enodes
0.165 * * [simplify]: iteration 6: 366 enodes
0.431 * * [simplify]: iteration 7: 901 enodes
1.883 * * [simplify]: iteration 8: 3866 enodes
3.737 * * [simplify]: iteration complete: 5000 enodes
3.737 * * [simplify]: Extracting #0: cost 1 inf + 0
3.739 * * [simplify]: Extracting #1: cost 251 inf + 0
3.750 * * [simplify]: Extracting #2: cost 671 inf + 8504
3.804 * * [simplify]: Extracting #3: cost 153 inf + 97580
3.886 * * [simplify]: Extracting #4: cost 0 inf + 129595
3.944 * [simplify]: Simplified to:
  (- (* x x) (* y y))
3.945 * * [progress]: iteration 1 / 4
3.945 * * * [progress]: picking best candidate
3.951 * * * * [pick]: Picked  #<alt (λ (x y) (- (* x x) (* y y)))>
3.951 * * * [progress]: localizing error
3.958 * * * [progress]: generating rewritten candidates
3.958 * * * * [progress]: [ 1 / 1 ] rewriting at (2)
3.965 * * * [progress]: generating series expansions
3.965 * * * * [progress]: [ 1 / 1 ] generating series at (2)
3.965 * [backup-simplify]: Simplify (- (* x x) (* y y)) into (- (pow x 2) (pow y 2))
3.965 * [approximate]: Taking taylor expansion of (- (pow x 2) (pow y 2)) in (x y) around 0
3.965 * [taylor]: Taking taylor expansion of (- (pow x 2) (pow y 2)) in y
3.965 * [taylor]: Taking taylor expansion of (pow x 2) in y
3.965 * [taylor]: Taking taylor expansion of x in y
3.965 * [backup-simplify]: Simplify x into x
3.965 * [taylor]: Taking taylor expansion of (pow y 2) in y
3.965 * [taylor]: Taking taylor expansion of y in y
3.965 * [backup-simplify]: Simplify 0 into 0
3.965 * [backup-simplify]: Simplify 1 into 1
3.965 * [taylor]: Taking taylor expansion of (- (pow x 2) (pow y 2)) in x
3.965 * [taylor]: Taking taylor expansion of (pow x 2) in x
3.965 * [taylor]: Taking taylor expansion of x in x
3.965 * [backup-simplify]: Simplify 0 into 0
3.965 * [backup-simplify]: Simplify 1 into 1
3.965 * [taylor]: Taking taylor expansion of (pow y 2) in x
3.965 * [taylor]: Taking taylor expansion of y in x
3.966 * [backup-simplify]: Simplify y into y
3.966 * [taylor]: Taking taylor expansion of (- (pow x 2) (pow y 2)) in x
3.966 * [taylor]: Taking taylor expansion of (pow x 2) in x
3.966 * [taylor]: Taking taylor expansion of x in x
3.966 * [backup-simplify]: Simplify 0 into 0
3.966 * [backup-simplify]: Simplify 1 into 1
3.966 * [taylor]: Taking taylor expansion of (pow y 2) in x
3.966 * [taylor]: Taking taylor expansion of y in x
3.966 * [backup-simplify]: Simplify y into y
3.966 * [backup-simplify]: Simplify (* y y) into (pow y 2)
3.966 * [backup-simplify]: Simplify (- (pow y 2)) into (- (pow y 2))
3.966 * [backup-simplify]: Simplify (+ 0 (- (pow y 2))) into (- (pow y 2))
3.966 * [taylor]: Taking taylor expansion of (- (pow y 2)) in y
3.966 * [taylor]: Taking taylor expansion of (pow y 2) in y
3.966 * [taylor]: Taking taylor expansion of y in y
3.966 * [backup-simplify]: Simplify 0 into 0
3.966 * [backup-simplify]: Simplify 1 into 1
3.966 * [backup-simplify]: Simplify (+ (* y 0) (* 0 y)) into 0
3.967 * [backup-simplify]: Simplify (- 0) into 0
3.967 * [backup-simplify]: Simplify (+ 0 0) into 0
3.967 * [taylor]: Taking taylor expansion of 0 in y
3.967 * [backup-simplify]: Simplify 0 into 0
3.967 * [backup-simplify]: Simplify 0 into 0
3.967 * [backup-simplify]: Simplify (* 1 1) into 1
3.968 * [backup-simplify]: Simplify (+ (* y 0) (+ (* 0 0) (* 0 y))) into 0
3.968 * [backup-simplify]: Simplify (- 0) into 0
3.968 * [backup-simplify]: Simplify (+ 1 0) into 1
3.968 * [taylor]: Taking taylor expansion of 1 in y
3.968 * [backup-simplify]: Simplify 1 into 1
3.968 * [backup-simplify]: Simplify 1 into 1
3.968 * [backup-simplify]: Simplify 0 into 0
3.968 * [backup-simplify]: Simplify (* 1 1) into 1
3.969 * [backup-simplify]: Simplify (- 1) into -1
3.969 * [backup-simplify]: Simplify -1 into -1
3.969 * [backup-simplify]: Simplify (+ (* 1 0) (* 0 1)) into 0
3.970 * [backup-simplify]: Simplify (+ (* y 0) (+ (* 0 0) (+ (* 0 0) (* 0 y)))) into 0
3.970 * [backup-simplify]: Simplify (- 0) into 0
3.970 * [backup-simplify]: Simplify (+ 0 0) into 0
3.970 * [taylor]: Taking taylor expansion of 0 in y
3.970 * [backup-simplify]: Simplify 0 into 0
3.970 * [backup-simplify]: Simplify 0 into 0
3.970 * [backup-simplify]: Simplify 0 into 0
3.970 * [backup-simplify]: Simplify 0 into 0
3.971 * [backup-simplify]: Simplify (+ (* 1 0) (* 0 1)) into 0
3.971 * [backup-simplify]: Simplify (- 0) into 0
3.971 * [backup-simplify]: Simplify 0 into 0
3.971 * [backup-simplify]: Simplify (+ (* 1 0) (+ (* 0 0) (* 0 1))) into 0
3.972 * [backup-simplify]: Simplify (+ (* y 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 y))))) into 0
3.972 * [backup-simplify]: Simplify (- 0) into 0
3.972 * [backup-simplify]: Simplify (+ 0 0) into 0
3.973 * [taylor]: Taking taylor expansion of 0 in y
3.973 * [backup-simplify]: Simplify 0 into 0
3.973 * [backup-simplify]: Simplify 0 into 0
3.973 * [backup-simplify]: Simplify 0 into 0
3.973 * [backup-simplify]: Simplify (+ (* -1 (pow (* y 1) 2)) (* 1 (pow (* 1 x) 2))) into (- (pow x 2) (pow y 2))
3.973 * [backup-simplify]: Simplify (- (* (/ 1 x) (/ 1 x)) (* (/ 1 y) (/ 1 y))) into (- (/ 1 (pow x 2)) (/ 1 (pow y 2)))
3.973 * [approximate]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in (x y) around 0
3.973 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in y
3.973 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in y
3.973 * [taylor]: Taking taylor expansion of (pow x 2) in y
3.973 * [taylor]: Taking taylor expansion of x in y
3.973 * [backup-simplify]: Simplify x into x
3.973 * [backup-simplify]: Simplify (* x x) into (pow x 2)
3.973 * [backup-simplify]: Simplify (/ 1 (pow x 2)) into (/ 1 (pow x 2))
3.973 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
3.973 * [taylor]: Taking taylor expansion of (pow y 2) in y
3.973 * [taylor]: Taking taylor expansion of y in y
3.973 * [backup-simplify]: Simplify 0 into 0
3.973 * [backup-simplify]: Simplify 1 into 1
3.974 * [backup-simplify]: Simplify (* 1 1) into 1
3.974 * [backup-simplify]: Simplify (/ 1 1) into 1
3.974 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in x
3.974 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
3.974 * [taylor]: Taking taylor expansion of (pow x 2) in x
3.974 * [taylor]: Taking taylor expansion of x in x
3.974 * [backup-simplify]: Simplify 0 into 0
3.974 * [backup-simplify]: Simplify 1 into 1
3.974 * [backup-simplify]: Simplify (* 1 1) into 1
3.974 * [backup-simplify]: Simplify (/ 1 1) into 1
3.974 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
3.974 * [taylor]: Taking taylor expansion of (pow y 2) in x
3.974 * [taylor]: Taking taylor expansion of y in x
3.974 * [backup-simplify]: Simplify y into y
3.974 * [backup-simplify]: Simplify (* y y) into (pow y 2)
3.975 * [backup-simplify]: Simplify (/ 1 (pow y 2)) into (/ 1 (pow y 2))
3.975 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in x
3.975 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
3.975 * [taylor]: Taking taylor expansion of (pow x 2) in x
3.975 * [taylor]: Taking taylor expansion of x in x
3.975 * [backup-simplify]: Simplify 0 into 0
3.975 * [backup-simplify]: Simplify 1 into 1
3.975 * [backup-simplify]: Simplify (* 1 1) into 1
3.975 * [backup-simplify]: Simplify (/ 1 1) into 1
3.975 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
3.975 * [taylor]: Taking taylor expansion of (pow y 2) in x
3.975 * [taylor]: Taking taylor expansion of y in x
3.975 * [backup-simplify]: Simplify y into y
3.975 * [backup-simplify]: Simplify (* y y) into (pow y 2)
3.975 * [backup-simplify]: Simplify (/ 1 (pow y 2)) into (/ 1 (pow y 2))
3.976 * [backup-simplify]: Simplify (+ 1 0) into 1
3.976 * [taylor]: Taking taylor expansion of 1 in y
3.976 * [backup-simplify]: Simplify 1 into 1
3.976 * [backup-simplify]: Simplify (+ (* 1 0) (* 0 1)) into 0
3.976 * [backup-simplify]: Simplify (- (+ (* 1 (/ 0 1)))) into 0
3.977 * [backup-simplify]: Simplify (+ 0 0) into 0
3.977 * [taylor]: Taking taylor expansion of 0 in y
3.977 * [backup-simplify]: Simplify 0 into 0
3.977 * [backup-simplify]: Simplify (+ (* 1 0) (+ (* 0 0) (* 0 1))) into 0
3.978 * [backup-simplify]: Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)))) into 0
3.978 * [backup-simplify]: Simplify (- (/ 1 (pow y 2))) into (- (/ 1 (pow y 2)))
3.978 * [backup-simplify]: Simplify (+ 0 (- (/ 1 (pow y 2)))) into (- (/ 1 (pow y 2)))
3.978 * [taylor]: Taking taylor expansion of (- (/ 1 (pow y 2))) in y
3.978 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
3.978 * [taylor]: Taking taylor expansion of (pow y 2) in y
3.978 * [taylor]: Taking taylor expansion of y in y
3.978 * [backup-simplify]: Simplify 0 into 0
3.978 * [backup-simplify]: Simplify 1 into 1
3.978 * [backup-simplify]: Simplify (* 1 1) into 1
3.979 * [backup-simplify]: Simplify (/ 1 1) into 1
3.979 * [backup-simplify]: Simplify (- 1) into -1
3.979 * [backup-simplify]: Simplify -1 into -1
3.979 * [backup-simplify]: Simplify 1 into 1
3.980 * [backup-simplify]: Simplify (+ (* 1 0) (+ (* 0 0) (+ (* 0 0) (* 0 1)))) into 0
3.981 * [backup-simplify]: Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
3.981 * [backup-simplify]: Simplify (+ (* y 0) (* 0 y)) into 0
3.981 * [backup-simplify]: Simplify (- (+ (* (/ 1 (pow y 2)) (/ 0 (pow y 2))))) into 0
3.981 * [backup-simplify]: Simplify (- 0) into 0
3.982 * [backup-simplify]: Simplify (+ 0 0) into 0
3.982 * [taylor]: Taking taylor expansion of 0 in y
3.982 * [backup-simplify]: Simplify 0 into 0
3.982 * [backup-simplify]: Simplify (+ (* 1 0) (* 0 1)) into 0
3.983 * [backup-simplify]: Simplify (- (+ (* 1 (/ 0 1)))) into 0
3.984 * [backup-simplify]: Simplify (- 0) into 0
3.984 * [backup-simplify]: Simplify 0 into 0
3.984 * [backup-simplify]: Simplify 0 into 0
3.984 * [backup-simplify]: Simplify 0 into 0
3.985 * [backup-simplify]: Simplify (+ (* 1 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 1))))) into 0
3.986 * [backup-simplify]: Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
3.986 * [backup-simplify]: Simplify (+ (* y 0) (+ (* 0 0) (* 0 y))) into 0
3.986 * [backup-simplify]: Simplify (- (+ (* (/ 1 (pow y 2)) (/ 0 (pow y 2))) (* 0 (/ 0 (pow y 2))))) into 0
3.987 * [backup-simplify]: Simplify (- 0) into 0
3.987 * [backup-simplify]: Simplify (+ 0 0) into 0
3.987 * [taylor]: Taking taylor expansion of 0 in y
3.987 * [backup-simplify]: Simplify 0 into 0
3.991 * [backup-simplify]: Simplify (+ (* 1 0) (+ (* 0 0) (* 0 1))) into 0
3.992 * [backup-simplify]: Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)))) into 0
3.992 * [backup-simplify]: Simplify (- 0) into 0
3.993 * [backup-simplify]: Simplify 0 into 0
3.993 * [backup-simplify]: Simplify 0 into 0
3.993 * [backup-simplify]: Simplify 0 into 0
3.993 * [backup-simplify]: Simplify (+ (* 1 (pow (* 1 (/ 1 (/ 1 x))) 2)) (* -1 (pow (* (/ 1 (/ 1 y)) 1) 2))) into (- (pow x 2) (pow y 2))
3.993 * [backup-simplify]: Simplify (- (* (/ 1 (- x)) (/ 1 (- x))) (* (/ 1 (- y)) (/ 1 (- y)))) into (- (/ 1 (pow x 2)) (/ 1 (pow y 2)))
3.993 * [approximate]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in (x y) around 0
3.993 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in y
3.993 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in y
3.993 * [taylor]: Taking taylor expansion of (pow x 2) in y
3.993 * [taylor]: Taking taylor expansion of x in y
3.993 * [backup-simplify]: Simplify x into x
3.993 * [backup-simplify]: Simplify (* x x) into (pow x 2)
3.993 * [backup-simplify]: Simplify (/ 1 (pow x 2)) into (/ 1 (pow x 2))
3.993 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
3.993 * [taylor]: Taking taylor expansion of (pow y 2) in y
3.993 * [taylor]: Taking taylor expansion of y in y
3.993 * [backup-simplify]: Simplify 0 into 0
3.993 * [backup-simplify]: Simplify 1 into 1
3.994 * [backup-simplify]: Simplify (* 1 1) into 1
3.994 * [backup-simplify]: Simplify (/ 1 1) into 1
3.994 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in x
3.994 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
3.994 * [taylor]: Taking taylor expansion of (pow x 2) in x
3.994 * [taylor]: Taking taylor expansion of x in x
3.994 * [backup-simplify]: Simplify 0 into 0
3.994 * [backup-simplify]: Simplify 1 into 1
3.994 * [backup-simplify]: Simplify (* 1 1) into 1
3.994 * [backup-simplify]: Simplify (/ 1 1) into 1
3.994 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
3.995 * [taylor]: Taking taylor expansion of (pow y 2) in x
3.995 * [taylor]: Taking taylor expansion of y in x
3.995 * [backup-simplify]: Simplify y into y
3.995 * [backup-simplify]: Simplify (* y y) into (pow y 2)
3.995 * [backup-simplify]: Simplify (/ 1 (pow y 2)) into (/ 1 (pow y 2))
3.995 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in x
3.995 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
3.995 * [taylor]: Taking taylor expansion of (pow x 2) in x
3.995 * [taylor]: Taking taylor expansion of x in x
3.995 * [backup-simplify]: Simplify 0 into 0
3.995 * [backup-simplify]: Simplify 1 into 1
3.995 * [backup-simplify]: Simplify (* 1 1) into 1
3.995 * [backup-simplify]: Simplify (/ 1 1) into 1
3.995 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
3.995 * [taylor]: Taking taylor expansion of (pow y 2) in x
3.995 * [taylor]: Taking taylor expansion of y in x
3.995 * [backup-simplify]: Simplify y into y
3.995 * [backup-simplify]: Simplify (* y y) into (pow y 2)
3.995 * [backup-simplify]: Simplify (/ 1 (pow y 2)) into (/ 1 (pow y 2))
3.996 * [backup-simplify]: Simplify (+ 1 0) into 1
3.996 * [taylor]: Taking taylor expansion of 1 in y
3.996 * [backup-simplify]: Simplify 1 into 1
3.996 * [backup-simplify]: Simplify (+ (* 1 0) (* 0 1)) into 0
3.997 * [backup-simplify]: Simplify (- (+ (* 1 (/ 0 1)))) into 0
3.997 * [backup-simplify]: Simplify (+ 0 0) into 0
3.997 * [taylor]: Taking taylor expansion of 0 in y
3.997 * [backup-simplify]: Simplify 0 into 0
3.997 * [backup-simplify]: Simplify (+ (* 1 0) (+ (* 0 0) (* 0 1))) into 0
3.998 * [backup-simplify]: Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)))) into 0
3.998 * [backup-simplify]: Simplify (- (/ 1 (pow y 2))) into (- (/ 1 (pow y 2)))
3.998 * [backup-simplify]: Simplify (+ 0 (- (/ 1 (pow y 2)))) into (- (/ 1 (pow y 2)))
3.998 * [taylor]: Taking taylor expansion of (- (/ 1 (pow y 2))) in y
3.998 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
3.998 * [taylor]: Taking taylor expansion of (pow y 2) in y
3.998 * [taylor]: Taking taylor expansion of y in y
3.998 * [backup-simplify]: Simplify 0 into 0
3.998 * [backup-simplify]: Simplify 1 into 1
3.998 * [backup-simplify]: Simplify (* 1 1) into 1
3.999 * [backup-simplify]: Simplify (/ 1 1) into 1
3.999 * [backup-simplify]: Simplify (- 1) into -1
3.999 * [backup-simplify]: Simplify -1 into -1
3.999 * [backup-simplify]: Simplify 1 into 1
4.000 * [backup-simplify]: Simplify (+ (* 1 0) (+ (* 0 0) (+ (* 0 0) (* 0 1)))) into 0
4.000 * [backup-simplify]: Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
4.000 * [backup-simplify]: Simplify (+ (* y 0) (* 0 y)) into 0
4.000 * [backup-simplify]: Simplify (- (+ (* (/ 1 (pow y 2)) (/ 0 (pow y 2))))) into 0
4.001 * [backup-simplify]: Simplify (- 0) into 0
4.001 * [backup-simplify]: Simplify (+ 0 0) into 0
4.001 * [taylor]: Taking taylor expansion of 0 in y
4.001 * [backup-simplify]: Simplify 0 into 0
4.001 * [backup-simplify]: Simplify (+ (* 1 0) (* 0 1)) into 0
4.002 * [backup-simplify]: Simplify (- (+ (* 1 (/ 0 1)))) into 0
4.002 * [backup-simplify]: Simplify (- 0) into 0
4.002 * [backup-simplify]: Simplify 0 into 0
4.002 * [backup-simplify]: Simplify 0 into 0
4.002 * [backup-simplify]: Simplify 0 into 0
4.003 * [backup-simplify]: Simplify (+ (* 1 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 1))))) into 0
4.003 * [backup-simplify]: Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
4.004 * [backup-simplify]: Simplify (+ (* y 0) (+ (* 0 0) (* 0 y))) into 0
4.004 * [backup-simplify]: Simplify (- (+ (* (/ 1 (pow y 2)) (/ 0 (pow y 2))) (* 0 (/ 0 (pow y 2))))) into 0
4.004 * [backup-simplify]: Simplify (- 0) into 0
4.004 * [backup-simplify]: Simplify (+ 0 0) into 0
4.004 * [taylor]: Taking taylor expansion of 0 in y
4.004 * [backup-simplify]: Simplify 0 into 0
4.005 * [backup-simplify]: Simplify (+ (* 1 0) (+ (* 0 0) (* 0 1))) into 0
4.005 * [backup-simplify]: Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)))) into 0
4.006 * [backup-simplify]: Simplify (- 0) into 0
4.006 * [backup-simplify]: Simplify 0 into 0
4.006 * [backup-simplify]: Simplify 0 into 0
4.006 * [backup-simplify]: Simplify 0 into 0
4.006 * [backup-simplify]: Simplify (+ (* 1 (pow (* 1 (/ 1 (/ 1 (- x)))) 2)) (* -1 (pow (* (/ 1 (/ 1 (- y))) 1) 2))) into (- (pow x 2) (pow y 2))
4.006 * * * [progress]: simplifying candidates
4.006 * [simplify]: Simplifying:
  (fma x x (- (* y y)))
  (fma (- y) y (* y y))
  (expm1 (- (* x x) (* y y)))
  (log1p (- (* x x) (* y y)))
  (- (* y y))
  (/ (exp (* x x)) (exp (* y y)))
  (log (- (* x x) (* y y)))
  (exp (- (* x x) (* y y)))
  (* (cbrt (- (* x x) (* y y))) (cbrt (- (* x x) (* y y))))
  (cbrt (- (* x x) (* y y)))
  (* (* (- (* x x) (* y y)) (- (* x x) (* y y))) (- (* x x) (* y y)))
  (sqrt (- (* x x) (* y y)))
  (sqrt (- (* x x) (* y y)))
  (- (pow (* x x) 3) (pow (* y y) 3))
  (+ (* (* x x) (* x x)) (+ (* (* y y) (* y y)) (* (* x x) (* y y))))
  (- (* y y))
  (- (* (* x x) (* x x)) (* (* y y) (* y y)))
  (+ (* x x) (* y y))
  (+ x y)
  (- x y)
  (- (* y y))
  (- (pow x 2) (pow y 2))
  (- (pow x 2) (pow y 2))
  (- (pow x 2) (pow y 2))
4.007 * * [simplify]: iteration 0: 38 enodes
4.014 * * [simplify]: iteration 1: 118 enodes
4.077 * * [simplify]: iteration 2: 646 enodes
4.552 * * [simplify]: iteration complete: 5000 enodes
4.552 * * [simplify]: Extracting #0: cost 17 inf + 0
4.554 * * [simplify]: Extracting #1: cost 513 inf + 0
4.564 * * [simplify]: Extracting #2: cost 1932 inf + 5720
4.614 * * [simplify]: Extracting #3: cost 812 inf + 136094
4.697 * * [simplify]: Extracting #4: cost 122 inf + 247843
4.788 * * [simplify]: Extracting #5: cost 25 inf + 271779
4.849 * * [simplify]: Extracting #6: cost 0 inf + 281168
4.938 * [simplify]: Simplified to:
  (* (+ x y) (- x y))
  (* y (+ (- y) y))
  (expm1 (* (+ x y) (- x y)))
  (log1p (* (+ x y) (- x y)))
  (- (* y y))
  (exp (* (+ x y) (- x y)))
  (log (* (+ x y) (- x y)))
  (exp (* (+ x y) (- x y)))
  (* (cbrt (* (+ x y) (- x y))) (cbrt (* (+ x y) (- x y))))
  (cbrt (* (+ x y) (- x y)))
  (* (* (+ x y) (- x y)) (* (* (+ x y) (- x y)) (* (+ x y) (- x y))))
  (sqrt (* (+ x y) (- x y)))
  (sqrt (* (+ x y) (- x y)))
  (- (* (* (* x x) (* x x)) (* x x)) (* (* (* y y) (* y y)) (* y y)))
  (fma (* x x) (* x x) (* (* y y) (+ (* x x) (* y y))))
  (- (* y y))
  (* (+ (* x x) (* y y)) (- (* x x) (* y y)))
  (fma x x (* y y))
  (+ x y)
  (- x y)
  (- (* y y))
  (* (+ x y) (- x y))
  (* (+ x y) (- x y))
  (* (+ x y) (- x y))
4.940 * * * [progress]: adding candidates to table
5.035 * * [progress]: iteration 2 / 4
5.035 * * * [progress]: picking best candidate
5.041 * * * * [pick]: Picked  #<alt (λ (x y) (* (+ x y) (- x y)))>
5.041 * * * [progress]: localizing error
5.055 * * * [progress]: generating rewritten candidates
5.055 * * * [progress]: generating series expansions
5.055 * * * [progress]: simplifying candidates
5.056 * [simplify]: Simplifying:
  
5.056 * * [simplify]: iteration 0: 0 enodes
5.056 * * [simplify]: iteration complete: 0 enodes
5.056 * * [simplify]: Extracting #0: cost 0 inf + 0
5.056 * [simplify]: Simplified to:
  
5.056 * * * [progress]: adding candidates to table
5.057 * [progress]: [Phase 3 of 3] Extracting.
5.063 * [simplify]: Simplifying:
  (* (+ x y) (- x y))
5.063 * * [simplify]: iteration 0: 5 enodes
5.064 * * [simplify]: iteration 1: 7 enodes
5.064 * * [simplify]: iteration complete: 7 enodes
5.064 * * [simplify]: Extracting #0: cost 1 inf + 0
5.064 * * [simplify]: Extracting #1: cost 3 inf + 0
5.064 * * [simplify]: Extracting #2: cost 5 inf + 0
5.064 * * [simplify]: Extracting #3: cost 3 inf + 2
5.064 * * [simplify]: Extracting #4: cost 0 inf + 208
5.064 * [simplify]: Simplified to:
  (* (+ y x) (- x y))
6.317 * [regime-testing]: Baseline error score: 0.0008751093886735842
6.329 * [regime-testing]: Oracle error score: 0.0008751093886735842
6.329 * [regime-testing]: End program error score: 0.0008751093886735842