5.110 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.017 * * * [progress]: [2/2] Setting up program.
0.019 * [progress]: [Phase 2 of 3] Improving.
0.019 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (* (+ x y) (- x y))
0.020 * * [simplify]: iteration  0 :  5  enodes  (cost  7 )
0.021 * * [simplify]: iteration  1 :  9  enodes  (cost  7 )
0.022 * * [simplify]: iteration  2 :  24  enodes  (cost  7 )
0.025 * * [simplify]: iteration  3 :  52  enodes  (cost  7 )
0.032 * * [simplify]: iteration  4 :  93  enodes  (cost  7 )
0.048 * * [simplify]: iteration  5 :  144  enodes  (cost  7 )
0.076 * * [simplify]: iteration  6 :  209  enodes  (cost  7 )
0.119 * * [simplify]: iteration  7 :  321  enodes  (cost  7 )
0.286 * * [simplify]: iteration  8 :  939  enodes  (cost  7 )
1.334 * * [simplify]: iteration  9 :  3170  enodes  (cost  7 )
3.351 * * [simplify]: iteration  done :  5000  enodes  (cost  7 )
3.351 * [simplify]: Simplified to:
   (- (* x x) (* y y))
3.353 * * [progress]: iteration 1 / 4
3.353 * * * [progress]: picking best candidate
3.355 * * * * [pick]: Picked  #<alt (λ (x y) (* (+ x y) (- x y)))>
3.355 * * * [progress]: localizing error
3.360 * * * [progress]: generating rewritten candidates
3.360 * * * * [progress]: [ 1 / 1 ] rewriting at (2)
3.382 * * * [progress]: generating series expansions
3.382 * * * * [progress]: [ 1 / 1 ] generating series at (2)
3.382 * [approximate]: Taking taylor expansion of (* (+ x y) (- x y)) in (x y) around 0
3.382 * [taylor]: Taking taylor expansion of (* (+ x y) (- x y)) in y
3.382 * [taylor]: Taking taylor expansion of (+ x y) in y
3.382 * [taylor]: Taking taylor expansion of x in y
3.382 * [taylor]: Taking taylor expansion of y in y
3.382 * [taylor]: Taking taylor expansion of (- x y) in y
3.382 * [taylor]: Taking taylor expansion of x in y
3.382 * [taylor]: Taking taylor expansion of y in y
3.382 * [taylor]: Taking taylor expansion of (* (+ x y) (- x y)) in x
3.382 * [taylor]: Taking taylor expansion of (+ x y) in x
3.382 * [taylor]: Taking taylor expansion of x in x
3.382 * [taylor]: Taking taylor expansion of y in x
3.382 * [taylor]: Taking taylor expansion of (- x y) in x
3.382 * [taylor]: Taking taylor expansion of x in x
3.382 * [taylor]: Taking taylor expansion of y in x
3.383 * [taylor]: Taking taylor expansion of (* (+ x y) (- x y)) in x
3.383 * [taylor]: Taking taylor expansion of (+ x y) in x
3.383 * [taylor]: Taking taylor expansion of x in x
3.383 * [taylor]: Taking taylor expansion of y in x
3.383 * [taylor]: Taking taylor expansion of (- x y) in x
3.383 * [taylor]: Taking taylor expansion of x in x
3.383 * [taylor]: Taking taylor expansion of y in x
3.383 * [taylor]: Taking taylor expansion of (* -1 (pow y 2)) in y
3.383 * [taylor]: Taking taylor expansion of -1 in y
3.383 * [taylor]: Taking taylor expansion of (pow y 2) in y
3.383 * [taylor]: Taking taylor expansion of y in y
3.384 * [taylor]: Taking taylor expansion of 0 in y
3.385 * [taylor]: Taking taylor expansion of 1 in y
3.387 * [taylor]: Taking taylor expansion of 0 in y
3.389 * [taylor]: Taking taylor expansion of 0 in y
3.390 * [approximate]: Taking taylor expansion of (* (- (/ 1 x) (/ 1 y)) (+ (/ 1 y) (/ 1 x))) in (x y) around 0
3.390 * [taylor]: Taking taylor expansion of (* (- (/ 1 x) (/ 1 y)) (+ (/ 1 y) (/ 1 x))) in y
3.390 * [taylor]: Taking taylor expansion of (- (/ 1 x) (/ 1 y)) in y
3.390 * [taylor]: Taking taylor expansion of (/ 1 x) in y
3.390 * [taylor]: Taking taylor expansion of x in y
3.390 * [taylor]: Taking taylor expansion of (/ 1 y) in y
3.390 * [taylor]: Taking taylor expansion of y in y
3.390 * [taylor]: Taking taylor expansion of (+ (/ 1 y) (/ 1 x)) in y
3.390 * [taylor]: Taking taylor expansion of (/ 1 y) in y
3.390 * [taylor]: Taking taylor expansion of y in y
3.391 * [taylor]: Taking taylor expansion of (/ 1 x) in y
3.391 * [taylor]: Taking taylor expansion of x in y
3.391 * [taylor]: Taking taylor expansion of (* (- (/ 1 x) (/ 1 y)) (+ (/ 1 y) (/ 1 x))) in x
3.391 * [taylor]: Taking taylor expansion of (- (/ 1 x) (/ 1 y)) in x
3.391 * [taylor]: Taking taylor expansion of (/ 1 x) in x
3.391 * [taylor]: Taking taylor expansion of x in x
3.391 * [taylor]: Taking taylor expansion of (/ 1 y) in x
3.391 * [taylor]: Taking taylor expansion of y in x
3.391 * [taylor]: Taking taylor expansion of (+ (/ 1 y) (/ 1 x)) in x
3.391 * [taylor]: Taking taylor expansion of (/ 1 y) in x
3.391 * [taylor]: Taking taylor expansion of y in x
3.391 * [taylor]: Taking taylor expansion of (/ 1 x) in x
3.391 * [taylor]: Taking taylor expansion of x in x
3.391 * [taylor]: Taking taylor expansion of (* (- (/ 1 x) (/ 1 y)) (+ (/ 1 y) (/ 1 x))) in x
3.391 * [taylor]: Taking taylor expansion of (- (/ 1 x) (/ 1 y)) in x
3.391 * [taylor]: Taking taylor expansion of (/ 1 x) in x
3.392 * [taylor]: Taking taylor expansion of x in x
3.392 * [taylor]: Taking taylor expansion of (/ 1 y) in x
3.392 * [taylor]: Taking taylor expansion of y in x
3.392 * [taylor]: Taking taylor expansion of (+ (/ 1 y) (/ 1 x)) in x
3.392 * [taylor]: Taking taylor expansion of (/ 1 y) in x
3.392 * [taylor]: Taking taylor expansion of y in x
3.392 * [taylor]: Taking taylor expansion of (/ 1 x) in x
3.392 * [taylor]: Taking taylor expansion of x in x
3.393 * [taylor]: Taking taylor expansion of 1 in y
3.394 * [taylor]: Taking taylor expansion of 0 in y
3.397 * [taylor]: Taking taylor expansion of (- (/ 1 (pow y 2))) in y
3.397 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
3.397 * [taylor]: Taking taylor expansion of (pow y 2) in y
3.397 * [taylor]: Taking taylor expansion of y in y
3.400 * [taylor]: Taking taylor expansion of 0 in y
3.404 * [taylor]: Taking taylor expansion of 0 in y
3.406 * [approximate]: Taking taylor expansion of (* -1 (* (+ (/ 1 y) (/ 1 x)) (- (/ 1 y) (/ 1 x)))) in (x y) around 0
3.406 * [taylor]: Taking taylor expansion of (* -1 (* (+ (/ 1 y) (/ 1 x)) (- (/ 1 y) (/ 1 x)))) in y
3.406 * [taylor]: Taking taylor expansion of -1 in y
3.406 * [taylor]: Taking taylor expansion of (* (+ (/ 1 y) (/ 1 x)) (- (/ 1 y) (/ 1 x))) in y
3.406 * [taylor]: Taking taylor expansion of (+ (/ 1 y) (/ 1 x)) in y
3.406 * [taylor]: Taking taylor expansion of (/ 1 y) in y
3.406 * [taylor]: Taking taylor expansion of y in y
3.406 * [taylor]: Taking taylor expansion of (/ 1 x) in y
3.406 * [taylor]: Taking taylor expansion of x in y
3.407 * [taylor]: Taking taylor expansion of (- (/ 1 y) (/ 1 x)) in y
3.407 * [taylor]: Taking taylor expansion of (/ 1 y) in y
3.407 * [taylor]: Taking taylor expansion of y in y
3.407 * [taylor]: Taking taylor expansion of (/ 1 x) in y
3.407 * [taylor]: Taking taylor expansion of x in y
3.407 * [taylor]: Taking taylor expansion of (* -1 (* (+ (/ 1 y) (/ 1 x)) (- (/ 1 y) (/ 1 x)))) in x
3.407 * [taylor]: Taking taylor expansion of -1 in x
3.407 * [taylor]: Taking taylor expansion of (* (+ (/ 1 y) (/ 1 x)) (- (/ 1 y) (/ 1 x))) in x
3.407 * [taylor]: Taking taylor expansion of (+ (/ 1 y) (/ 1 x)) in x
3.407 * [taylor]: Taking taylor expansion of (/ 1 y) in x
3.407 * [taylor]: Taking taylor expansion of y in x
3.407 * [taylor]: Taking taylor expansion of (/ 1 x) in x
3.407 * [taylor]: Taking taylor expansion of x in x
3.407 * [taylor]: Taking taylor expansion of (- (/ 1 y) (/ 1 x)) in x
3.407 * [taylor]: Taking taylor expansion of (/ 1 y) in x
3.407 * [taylor]: Taking taylor expansion of y in x
3.407 * [taylor]: Taking taylor expansion of (/ 1 x) in x
3.407 * [taylor]: Taking taylor expansion of x in x
3.408 * [taylor]: Taking taylor expansion of (* -1 (* (+ (/ 1 y) (/ 1 x)) (- (/ 1 y) (/ 1 x)))) in x
3.408 * [taylor]: Taking taylor expansion of -1 in x
3.408 * [taylor]: Taking taylor expansion of (* (+ (/ 1 y) (/ 1 x)) (- (/ 1 y) (/ 1 x))) in x
3.408 * [taylor]: Taking taylor expansion of (+ (/ 1 y) (/ 1 x)) in x
3.408 * [taylor]: Taking taylor expansion of (/ 1 y) in x
3.408 * [taylor]: Taking taylor expansion of y in x
3.408 * [taylor]: Taking taylor expansion of (/ 1 x) in x
3.408 * [taylor]: Taking taylor expansion of x in x
3.408 * [taylor]: Taking taylor expansion of (- (/ 1 y) (/ 1 x)) in x
3.408 * [taylor]: Taking taylor expansion of (/ 1 y) in x
3.408 * [taylor]: Taking taylor expansion of y in x
3.408 * [taylor]: Taking taylor expansion of (/ 1 x) in x
3.408 * [taylor]: Taking taylor expansion of x in x
3.410 * [taylor]: Taking taylor expansion of 1 in y
3.412 * [taylor]: Taking taylor expansion of 0 in y
3.415 * [taylor]: Taking taylor expansion of (- (/ 1 (pow y 2))) in y
3.415 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
3.415 * [taylor]: Taking taylor expansion of (pow y 2) in y
3.415 * [taylor]: Taking taylor expansion of y in y
3.419 * [taylor]: Taking taylor expansion of 0 in y
3.424 * [taylor]: Taking taylor expansion of 0 in y
3.426 * * * [progress]: simplifying candidates
3.426 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (* (+ x y) (- x y))
  (+ (log (+ x y)) (log (- x y)))
  (log (* (+ x y) (- x y)))
  (exp (* (+ x y) (- x y)))
  (* (* (* (+ x y) (+ x y)) (+ x y)) (* (* (- x y) (- 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)))
  (* (+ (pow x 3) (pow y 3)) (- (pow x 3) (pow y 3)))
  (* (+ (* x x) (- (* y y) (* x y))) (+ (* x x) (+ (* y y) (* x y))))
  (* (+ (pow x 3) (pow y 3)) (- (* x x) (* y y)))
  (* (+ (* x x) (- (* y y) (* x y))) (+ x y))
  (* (- (* x x) (* y y)) (- (pow x 3) (pow y 3)))
  (* (- x y) (+ (* x x) (+ (* y y) (* x y))))
  (* (- (* x x) (* y y)) (- (* x x) (* y y)))
  (* (- x y) (+ x y))
  (* (sqrt (+ x y)) (sqrt (- x y)))
  (* (sqrt (+ x y)) (sqrt (- x y)))
  (* (+ x y) x)
  (* (+ x y) (- y))
  (* (+ x y) x)
  (* (+ x y) (- y))
  (* x (+ x y))
  (* (- y) (+ x y))
  (* x (+ x y))
  (* (- y) (+ x y))
  (* (+ x y) (* (cbrt (- x y)) (cbrt (- x y))))
  (* (+ x y) (sqrt (- x y)))
  (* (+ x y) 1)
  (* (+ x y) (+ (sqrt x) (sqrt y)))
  (* (+ x y) 1)
  (* (cbrt (+ x y)) (- x y))
  (* (sqrt (+ x y)) (- x y))
  (* (+ x y) (- x y))
  (* (+ x y) (- x y))
  (* (+ x y) (- (pow x 3) (pow y 3)))
  (* (+ x y) (- (* x x) (* y y)))
  (* (+ (pow x 3) (pow y 3)) (- x y))
  (* (- (* x x) (* y y)) (- x y))
  (- (pow x 2) (pow y 2))
  (- (pow x 2) (pow y 2))
  (- (pow x 2) (pow y 2))
3.428 * * [simplify]: iteration  0 :  70  enodes  (cost  436 )
3.443 * * [simplify]: iteration  1 :  194  enodes  (cost  423 )
3.492 * * [simplify]: iteration  2 :  797  enodes  (cost  395 )
4.251 * * [simplify]: iteration  3 :  4217  enodes  (cost  395 )
5.834 * * [simplify]: iteration  done :  5000  enodes  (cost  395 )
5.834 * [simplify]: Simplified to:
   (- (pow x 2) (pow y 2))
  (log (* (+ x y) (- x y)))
  (log (* (+ x y) (- x y)))
  (exp (* (+ x y) (- x y)))
  (pow (- (pow x 2) (pow y 2)) 3)
  (* (cbrt (* (+ x y) (- x y))) (cbrt (* (+ x y) (- x y))))
  (cbrt (* (+ x y) (- x y)))
  (pow (- (pow x 2) (pow y 2)) 3)
  (sqrt (* (+ x y) (- x y)))
  (sqrt (* (+ x y) (- x y)))
  (* (+ (pow x 3) (pow y 3)) (- (pow x 3) (pow y 3)))
  (* (+ (* y (- y x)) (* x x)) (+ (* y (+ x y)) (* x x)))
  (* (+ (pow x 3) (pow y 3)) (- (* x x) (* y y)))
  (* (+ x y) (+ (* y (- y x)) (* x x)))
  (* (- (* x x) (* y y)) (- (pow x 3) (pow y 3)))
  (* (+ (* y (+ x y)) (* x x)) (- x y))
  (* (* (+ x y) (- (* x x) (* y y))) (- x y))
  (- (pow x 2) (pow y 2))
  (* (sqrt (+ x y)) (sqrt (- x y)))
  (* (sqrt (+ x y)) (sqrt (- x y)))
  (* x (+ x y))
  (* (- y) (+ x y))
  (* x (+ x y))
  (* (- y) (+ x y))
  (* x (+ x y))
  (* (- y) (+ x y))
  (* x (+ x y))
  (* (- y) (+ x y))
  (* (+ x y) (* (cbrt (- x y)) (cbrt (- x y))))
  (* (+ x y) (sqrt (- x y)))
  (+ x y)
  (* (+ x y) (+ (sqrt x) (sqrt y)))
  (+ x y)
  (* (cbrt (+ x y)) (- x y))
  (* (sqrt (+ x y)) (- x y))
  (- (pow x 2) (pow y 2))
  (- (pow x 2) (pow y 2))
  (* (+ x y) (- (pow x 3) (pow y 3)))
  (* (+ x y) (- (* x x) (* y y)))
  (* (+ (pow x 3) (pow y 3)) (- x y))
  (* (- (pow x 2) (pow y 2)) (- x y))
  (- (pow x 2) (pow y 2))
  (- (pow x 2) (pow y 2))
  (- (pow x 2) (pow y 2))
5.835 * * * [progress]: adding candidates to table
5.908 * * [progress]: iteration 2 / 4
5.908 * * * [progress]: picking best candidate
5.910 * * * * [pick]: Picked  #<alt (λ (x y) (- (* x x) (* y y)))>
5.910 * * * [progress]: localizing error
5.914 * * * [progress]: generating rewritten candidates
5.914 * * * * [progress]: [ 1 / 1 ] rewriting at (2)
5.917 * * * [progress]: generating series expansions
5.917 * * * * [progress]: [ 1 / 1 ] generating series at (2)
5.917 * [approximate]: Taking taylor expansion of (- (pow x 2) (pow y 2)) in (x y) around 0
5.918 * [taylor]: Taking taylor expansion of (- (pow x 2) (pow y 2)) in y
5.918 * [taylor]: Taking taylor expansion of (pow x 2) in y
5.918 * [taylor]: Taking taylor expansion of x in y
5.918 * [taylor]: Taking taylor expansion of (pow y 2) in y
5.918 * [taylor]: Taking taylor expansion of y in y
5.918 * [taylor]: Taking taylor expansion of (- (pow x 2) (pow y 2)) in x
5.918 * [taylor]: Taking taylor expansion of (pow x 2) in x
5.918 * [taylor]: Taking taylor expansion of x in x
5.918 * [taylor]: Taking taylor expansion of (pow y 2) in x
5.918 * [taylor]: Taking taylor expansion of y in x
5.918 * [taylor]: Taking taylor expansion of (- (pow x 2) (pow y 2)) in x
5.918 * [taylor]: Taking taylor expansion of (pow x 2) in x
5.918 * [taylor]: Taking taylor expansion of x in x
5.918 * [taylor]: Taking taylor expansion of (pow y 2) in x
5.918 * [taylor]: Taking taylor expansion of y in x
5.918 * [taylor]: Taking taylor expansion of (- (pow y 2)) in y
5.918 * [taylor]: Taking taylor expansion of (pow y 2) in y
5.918 * [taylor]: Taking taylor expansion of y in y
5.919 * [taylor]: Taking taylor expansion of 0 in y
5.920 * [taylor]: Taking taylor expansion of 1 in y
5.922 * [taylor]: Taking taylor expansion of 0 in y
5.924 * [taylor]: Taking taylor expansion of 0 in y
5.925 * [approximate]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in (x y) around 0
5.925 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in y
5.925 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in y
5.925 * [taylor]: Taking taylor expansion of (pow x 2) in y
5.925 * [taylor]: Taking taylor expansion of x in y
5.925 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
5.925 * [taylor]: Taking taylor expansion of (pow y 2) in y
5.925 * [taylor]: Taking taylor expansion of y in y
5.926 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in x
5.926 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
5.926 * [taylor]: Taking taylor expansion of (pow x 2) in x
5.926 * [taylor]: Taking taylor expansion of x in x
5.926 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
5.926 * [taylor]: Taking taylor expansion of (pow y 2) in x
5.926 * [taylor]: Taking taylor expansion of y in x
5.927 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in x
5.927 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
5.927 * [taylor]: Taking taylor expansion of (pow x 2) in x
5.927 * [taylor]: Taking taylor expansion of x in x
5.927 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
5.927 * [taylor]: Taking taylor expansion of (pow y 2) in x
5.927 * [taylor]: Taking taylor expansion of y in x
5.928 * [taylor]: Taking taylor expansion of 1 in y
5.929 * [taylor]: Taking taylor expansion of 0 in y
5.930 * [taylor]: Taking taylor expansion of (- (/ 1 (pow y 2))) in y
5.930 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
5.930 * [taylor]: Taking taylor expansion of (pow y 2) in y
5.930 * [taylor]: Taking taylor expansion of y in y
5.933 * [taylor]: Taking taylor expansion of 0 in y
5.936 * [taylor]: Taking taylor expansion of 0 in y
5.938 * [approximate]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in (x y) around 0
5.938 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in y
5.938 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in y
5.938 * [taylor]: Taking taylor expansion of (pow x 2) in y
5.938 * [taylor]: Taking taylor expansion of x in y
5.938 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
5.938 * [taylor]: Taking taylor expansion of (pow y 2) in y
5.938 * [taylor]: Taking taylor expansion of y in y
5.939 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in x
5.939 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
5.939 * [taylor]: Taking taylor expansion of (pow x 2) in x
5.939 * [taylor]: Taking taylor expansion of x in x
5.939 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
5.940 * [taylor]: Taking taylor expansion of (pow y 2) in x
5.940 * [taylor]: Taking taylor expansion of y in x
5.940 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in x
5.940 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
5.940 * [taylor]: Taking taylor expansion of (pow x 2) in x
5.940 * [taylor]: Taking taylor expansion of x in x
5.940 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
5.940 * [taylor]: Taking taylor expansion of (pow y 2) in x
5.940 * [taylor]: Taking taylor expansion of y in x
5.941 * [taylor]: Taking taylor expansion of 1 in y
5.942 * [taylor]: Taking taylor expansion of 0 in y
5.943 * [taylor]: Taking taylor expansion of (- (/ 1 (pow y 2))) in y
5.943 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
5.943 * [taylor]: Taking taylor expansion of (pow y 2) in y
5.943 * [taylor]: Taking taylor expansion of y in y
5.946 * [taylor]: Taking taylor expansion of 0 in y
5.949 * [taylor]: Taking taylor expansion of 0 in y
5.951 * * * [progress]: simplifying candidates
5.951 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (/ (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))
5.953 * * [simplify]: iteration  0 :  33  enodes  (cost  180 )
5.959 * * [simplify]: iteration  1 :  93  enodes  (cost  175 )
5.994 * * [simplify]: iteration  2 :  332  enodes  (cost  145 )
6.085 * * [simplify]: iteration  3 :  804  enodes  (cost  145 )
6.345 * * [simplify]: iteration  4 :  2682  enodes  (cost  145 )
7.451 * * [simplify]: iteration  done :  5000  enodes  (cost  145 )
7.452 * [simplify]: Simplified to:
   (exp (- (* x x) (* 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)))
  (pow (- (pow x 2) (pow y 2)) 3)
  (sqrt (- (* x x) (* y y)))
  (sqrt (- (* x x) (* y y)))
  (- (pow x 6) (pow y 6))
  (+ (* (pow y 2) (+ (* x x) (* y y))) (pow x 4))
  (- (* y y))
  (- (pow x 4) (pow y 4))
  (+ (* 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))
7.452 * * * [progress]: adding candidates to table
7.483 * [progress]: [Phase 3 of 3] Extracting.
7.483 * * [regime]: Finding splitpoints for: (#<alt (λ (x y) (* (+ x y) (- x y)))> #<alt (λ (x y) (- (* x x) (* y y)))>)
7.483 * * * [regime-changes]: Trying 3 branch expressions: ((* (+ x y) (- x y)) y x)
7.483 * * * * [regimes]: Trying to branch on (* (+ x y) (- x y)) from (#<alt (λ (x y) (* (+ x y) (- x y)))> #<alt (λ (x y) (- (* x x) (* y y)))>)
7.494 * * * * [regimes]: Trying to branch on y from (#<alt (λ (x y) (* (+ x y) (- x y)))> #<alt (λ (x y) (- (* x x) (* y y)))>)
7.504 * * * * [regimes]: Trying to branch on x from (#<alt (λ (x y) (* (+ x y) (- x y)))> #<alt (λ (x y) (- (* x x) (* y y)))>)
7.515 * * * [regime]: Found split indices: #<option (#s(si 0 255))>
7.515 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (* (+ x y) (- x y))
7.516 * * [simplify]: iteration  0 :  5  enodes  (cost  7 )
7.516 * * [simplify]: iteration  1 :  7  enodes  (cost  7 )
7.516 * * [simplify]: iteration  done :  7  enodes  (cost  7 )
7.516 * [simplify]: Simplified to:
   (* (+ x y) (- x y))
8.041 * [regime-testing]: Baseline error score: 0.0016252031503937992
8.041 * [regime-testing]: Oracle error score: 0.00025003125390673836
8.042 * [regime-testing]: End program error score: 0.0016252031503937992