0.853 * [progress]: [Phase 1 of 3] Setting up.
0.002 * * * [progress]: [1/2] Preparing points
0.259 * * * [progress]: [2/2] Setting up program.
0.261 * [progress]: [Phase 2 of 3] Improving.
0.264 * [simplify]: Simplifying using  #<procedure:simplify-batch-egg> :
   (* 0.5 (- (* x x) y))
0.270 * * [simplify]: iteration  0 :  9  enodes  (cost  3 )
0.271 * * [simplify]: iteration  1 :  16  enodes  (cost  3 )
0.273 * * [simplify]: iteration  2 :  26  enodes  (cost  3 )
0.274 * * [simplify]: iteration  3 :  33  enodes  (cost  3 )
0.275 * * [simplify]: iteration  4 :  33  enodes  (cost  3 )
0.276 * [simplify]: Simplified to:
   (* 0.5 (- (* x x) y))
0.278 * * [progress]: iteration 1 / 4
0.278 * * * [progress]: picking best candidate
0.279 * * * * [pick]: Picked  #<alt (λ (x y) (* 0.5 (- (* x x) y)))>
0.279 * * * [progress]: localizing error
0.286 * * * [progress]: generating rewritten candidates
0.286 * * * * [progress]: [ 1 / 1 ] rewriting at (2 2)
0.294 * * * [progress]: generating series expansions
0.294 * * * * [progress]: [ 1 / 1 ] generating series at (2 2)
0.299 * [approximate]: Taking taylor expansion of (- (pow x 2) y) in (x y) around 0
0.299 * [taylor]: Taking taylor expansion of (- (pow x 2) y) in y
0.299 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.299 * [taylor]: Taking taylor expansion of x in y
0.300 * [taylor]: Taking taylor expansion of y in y
0.300 * [taylor]: Taking taylor expansion of (- (pow x 2) y) in x
0.300 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.300 * [taylor]: Taking taylor expansion of x in x
0.300 * [taylor]: Taking taylor expansion of y in x
0.300 * [taylor]: Taking taylor expansion of (- (pow x 2) y) in x
0.300 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.300 * [taylor]: Taking taylor expansion of x in x
0.300 * [taylor]: Taking taylor expansion of y in x
0.301 * [taylor]: Taking taylor expansion of (- y) in y
0.301 * [taylor]: Taking taylor expansion of y in y
0.302 * [taylor]: Taking taylor expansion of 0 in y
0.303 * [taylor]: Taking taylor expansion of 1 in y
0.304 * [taylor]: Taking taylor expansion of 0 in y
0.305 * [approximate]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 y)) in (x y) around 0
0.305 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 y)) in y
0.305 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in y
0.305 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.305 * [taylor]: Taking taylor expansion of x in y
0.306 * [taylor]: Taking taylor expansion of (/ 1 y) in y
0.306 * [taylor]: Taking taylor expansion of y in y
0.306 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 y)) in x
0.306 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.306 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.306 * [taylor]: Taking taylor expansion of x in x
0.306 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.307 * [taylor]: Taking taylor expansion of y in x
0.307 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 y)) in x
0.307 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.307 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.307 * [taylor]: Taking taylor expansion of x in x
0.307 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.307 * [taylor]: Taking taylor expansion of y in x
0.307 * [taylor]: Taking taylor expansion of 1 in y
0.309 * [taylor]: Taking taylor expansion of 0 in y
0.310 * [taylor]: Taking taylor expansion of (- (/ 1 y)) in y
0.310 * [taylor]: Taking taylor expansion of (/ 1 y) in y
0.310 * [taylor]: Taking taylor expansion of y in y
0.312 * [taylor]: Taking taylor expansion of 0 in y
0.315 * [taylor]: Taking taylor expansion of 0 in y
0.315 * [approximate]: Taking taylor expansion of (+ (/ 1 (pow x 2)) (/ 1 y)) in (x y) around 0
0.315 * [taylor]: Taking taylor expansion of (+ (/ 1 (pow x 2)) (/ 1 y)) in y
0.315 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in y
0.315 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.315 * [taylor]: Taking taylor expansion of x in y
0.315 * [taylor]: Taking taylor expansion of (/ 1 y) in y
0.315 * [taylor]: Taking taylor expansion of y in y
0.316 * [taylor]: Taking taylor expansion of (+ (/ 1 (pow x 2)) (/ 1 y)) in x
0.316 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.316 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.316 * [taylor]: Taking taylor expansion of x in x
0.316 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.316 * [taylor]: Taking taylor expansion of y in x
0.316 * [taylor]: Taking taylor expansion of (+ (/ 1 (pow x 2)) (/ 1 y)) in x
0.316 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.316 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.316 * [taylor]: Taking taylor expansion of x in x
0.317 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.317 * [taylor]: Taking taylor expansion of y in x
0.317 * [taylor]: Taking taylor expansion of 1 in y
0.318 * [taylor]: Taking taylor expansion of 0 in y
0.320 * [taylor]: Taking taylor expansion of (/ 1 y) in y
0.320 * [taylor]: Taking taylor expansion of y in y
0.321 * [taylor]: Taking taylor expansion of 0 in y
0.323 * [taylor]: Taking taylor expansion of 0 in y
0.323 * * * [progress]: simplifying candidates
0.324 * [simplify]: Simplifying using  #<procedure:simplify-batch-egg> :
   (/ (exp (* x x)) (exp y))
  (log (- (* x x) y))
  (exp (- (* x x) y))
  (* (cbrt (- (* x x) y)) (cbrt (- (* x x) y)))
  (cbrt (- (* x x) y))
  (* (* (- (* x x) y) (- (* x x) y)) (- (* x x) y))
  (sqrt (- (* x x) y))
  (sqrt (- (* x x) y))
  (- (pow (* x x) 3) (pow y 3))
  (+ (* (* x x) (* x x)) (+ (* y y) (* (* x x) y)))
  (- y)
  (- (* (* x x) (* x x)) (* y y))
  (+ (* x x) y)
  (+ x (sqrt y))
  (- x (sqrt y))
  (- y)
  (- (pow x 2) y)
  (- (pow x 2) y)
  (- (pow x 2) y)
0.327 * * [simplify]: iteration  0 :  73  enodes  (cost  63 )
0.329 * * [simplify]: iteration  1 :  214  enodes  (cost  56 )
0.333 * * [simplify]: iteration  2 :  650  enodes  (cost  56 )
0.345 * * [simplify]: iteration  3 :  1900  enodes  (cost  56 )
0.382 * * [simplify]: iteration  4 :  5002  enodes  (cost  56 )
0.383 * [simplify]: Simplified to:
   (exp (- (* x x) y))
  (log (- (* x x) y))
  (exp (- (* x x) y))
  (* (cbrt (- (* x x) y)) (cbrt (- (* x x) y)))
  (cbrt (- (* x x) y))
  (pow (- (pow x 2) y) 3)
  (sqrt (- (* x x) y))
  (sqrt (- (* x x) y))
  (- (pow (* x x) 3) (pow y 3))
  (+ (+ (pow x 4) (* (* x x) y)) (* y y))
  (- 0 y)
  (+ (- (* y y)) (pow x 4))
  (+ (* x x) y)
  (+ x (sqrt y))
  (- x (sqrt y))
  (- 0 y)
  (- (pow x 2) y)
  (- (pow x 2) y)
  (- (pow x 2) y)
0.383 * * * [progress]: adding candidates to table
0.424 * * [progress]: iteration 2 / 4
0.424 * * * [progress]: picking best candidate
0.427 * * * * [pick]: Picked  #<alt (λ (x y) (* 0.5 (/ (+ (- (* y y)) (pow x 4)) (+ (* x x) y))))>
0.427 * * * [progress]: localizing error
0.439 * * * [progress]: generating rewritten candidates
0.439 * * * * [progress]: [ 1 / 2 ] rewriting at (2 2)
0.450 * * * * [progress]: [ 2 / 2 ] rewriting at (2 2 1)
0.458 * * * [progress]: generating series expansions
0.458 * * * * [progress]: [ 1 / 2 ] generating series at (2 2)
0.459 * [approximate]: Taking taylor expansion of (/ (- (pow x 4) (pow y 2)) (+ (pow x 2) y)) in (y x) around 0
0.459 * [taylor]: Taking taylor expansion of (/ (- (pow x 4) (pow y 2)) (+ (pow x 2) y)) in x
0.459 * [taylor]: Taking taylor expansion of (- (pow x 4) (pow y 2)) in x
0.459 * [taylor]: Taking taylor expansion of (pow x 4) in x
0.459 * [taylor]: Taking taylor expansion of x in x
0.459 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.459 * [taylor]: Taking taylor expansion of y in x
0.459 * [taylor]: Taking taylor expansion of (+ (pow x 2) y) in x
0.459 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.459 * [taylor]: Taking taylor expansion of x in x
0.459 * [taylor]: Taking taylor expansion of y in x
0.459 * [taylor]: Taking taylor expansion of (/ (- (pow x 4) (pow y 2)) (+ (pow x 2) y)) in y
0.459 * [taylor]: Taking taylor expansion of (- (pow x 4) (pow y 2)) in y
0.459 * [taylor]: Taking taylor expansion of (pow x 4) in y
0.459 * [taylor]: Taking taylor expansion of x in y
0.459 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.459 * [taylor]: Taking taylor expansion of y in y
0.459 * [taylor]: Taking taylor expansion of (+ (pow x 2) y) in y
0.459 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.459 * [taylor]: Taking taylor expansion of x in y
0.459 * [taylor]: Taking taylor expansion of y in y
0.460 * [taylor]: Taking taylor expansion of (/ (- (pow x 4) (pow y 2)) (+ (pow x 2) y)) in y
0.460 * [taylor]: Taking taylor expansion of (- (pow x 4) (pow y 2)) in y
0.460 * [taylor]: Taking taylor expansion of (pow x 4) in y
0.460 * [taylor]: Taking taylor expansion of x in y
0.460 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.460 * [taylor]: Taking taylor expansion of y in y
0.460 * [taylor]: Taking taylor expansion of (+ (pow x 2) y) in y
0.460 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.460 * [taylor]: Taking taylor expansion of x in y
0.460 * [taylor]: Taking taylor expansion of y in y
0.460 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.460 * [taylor]: Taking taylor expansion of x in x
0.462 * [taylor]: Taking taylor expansion of (- 1) in x
0.462 * [taylor]: Taking taylor expansion of 1 in x
0.464 * [taylor]: Taking taylor expansion of 0 in x
0.468 * [taylor]: Taking taylor expansion of 0 in x
0.473 * [taylor]: Taking taylor expansion of 0 in x
0.474 * [approximate]: Taking taylor expansion of (/ (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) (+ (/ 1 (pow x 2)) (/ 1 y))) in (y x) around 0
0.474 * [taylor]: Taking taylor expansion of (/ (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) (+ (/ 1 (pow x 2)) (/ 1 y))) in x
0.474 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) in x
0.474 * [taylor]: Taking taylor expansion of (/ 1 (pow x 4)) in x
0.474 * [taylor]: Taking taylor expansion of (pow x 4) in x
0.474 * [taylor]: Taking taylor expansion of x in x
0.474 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.474 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.474 * [taylor]: Taking taylor expansion of y in x
0.475 * [taylor]: Taking taylor expansion of (+ (/ 1 (pow x 2)) (/ 1 y)) in x
0.475 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.475 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.475 * [taylor]: Taking taylor expansion of x in x
0.475 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.475 * [taylor]: Taking taylor expansion of y in x
0.476 * [taylor]: Taking taylor expansion of (/ (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) (+ (/ 1 (pow x 2)) (/ 1 y))) in y
0.476 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) in y
0.476 * [taylor]: Taking taylor expansion of (/ 1 (pow x 4)) in y
0.476 * [taylor]: Taking taylor expansion of (pow x 4) in y
0.476 * [taylor]: Taking taylor expansion of x in y
0.476 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.476 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.476 * [taylor]: Taking taylor expansion of y in y
0.477 * [taylor]: Taking taylor expansion of (+ (/ 1 (pow x 2)) (/ 1 y)) in y
0.477 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in y
0.477 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.477 * [taylor]: Taking taylor expansion of x in y
0.477 * [taylor]: Taking taylor expansion of (/ 1 y) in y
0.477 * [taylor]: Taking taylor expansion of y in y
0.478 * [taylor]: Taking taylor expansion of (/ (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) (+ (/ 1 (pow x 2)) (/ 1 y))) in y
0.478 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) in y
0.478 * [taylor]: Taking taylor expansion of (/ 1 (pow x 4)) in y
0.478 * [taylor]: Taking taylor expansion of (pow x 4) in y
0.478 * [taylor]: Taking taylor expansion of x in y
0.478 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.478 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.478 * [taylor]: Taking taylor expansion of y in y
0.479 * [taylor]: Taking taylor expansion of (+ (/ 1 (pow x 2)) (/ 1 y)) in y
0.479 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in y
0.479 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.479 * [taylor]: Taking taylor expansion of x in y
0.479 * [taylor]: Taking taylor expansion of (/ 1 y) in y
0.479 * [taylor]: Taking taylor expansion of y in y
0.480 * [taylor]: Taking taylor expansion of -1 in x
0.482 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.483 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.483 * [taylor]: Taking taylor expansion of x in x
0.486 * [taylor]: Taking taylor expansion of 0 in x
0.491 * [taylor]: Taking taylor expansion of 0 in x
0.502 * [taylor]: Taking taylor expansion of 0 in x
0.509 * [taylor]: Taking taylor expansion of 0 in x
0.510 * [approximate]: Taking taylor expansion of (/ (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) (- (/ 1 (pow x 2)) (/ 1 y))) in (y x) around 0
0.510 * [taylor]: Taking taylor expansion of (/ (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) (- (/ 1 (pow x 2)) (/ 1 y))) in x
0.510 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) in x
0.510 * [taylor]: Taking taylor expansion of (/ 1 (pow x 4)) in x
0.510 * [taylor]: Taking taylor expansion of (pow x 4) in x
0.510 * [taylor]: Taking taylor expansion of x in x
0.511 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.511 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.511 * [taylor]: Taking taylor expansion of y in x
0.511 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 y)) in x
0.511 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.511 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.511 * [taylor]: Taking taylor expansion of x in x
0.512 * [taylor]: Taking taylor expansion of (/ 1 y) in x
0.512 * [taylor]: Taking taylor expansion of y in x
0.512 * [taylor]: Taking taylor expansion of (/ (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) (- (/ 1 (pow x 2)) (/ 1 y))) in y
0.512 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) in y
0.512 * [taylor]: Taking taylor expansion of (/ 1 (pow x 4)) in y
0.512 * [taylor]: Taking taylor expansion of (pow x 4) in y
0.512 * [taylor]: Taking taylor expansion of x in y
0.513 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.513 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.513 * [taylor]: Taking taylor expansion of y in y
0.513 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 y)) in y
0.513 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in y
0.513 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.513 * [taylor]: Taking taylor expansion of x in y
0.513 * [taylor]: Taking taylor expansion of (/ 1 y) in y
0.513 * [taylor]: Taking taylor expansion of y in y
0.515 * [taylor]: Taking taylor expansion of (/ (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) (- (/ 1 (pow x 2)) (/ 1 y))) in y
0.515 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) in y
0.515 * [taylor]: Taking taylor expansion of (/ 1 (pow x 4)) in y
0.515 * [taylor]: Taking taylor expansion of (pow x 4) in y
0.515 * [taylor]: Taking taylor expansion of x in y
0.515 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.515 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.515 * [taylor]: Taking taylor expansion of y in y
0.516 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 y)) in y
0.516 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in y
0.516 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.516 * [taylor]: Taking taylor expansion of x in y
0.516 * [taylor]: Taking taylor expansion of (/ 1 y) in y
0.516 * [taylor]: Taking taylor expansion of y in y
0.517 * [taylor]: Taking taylor expansion of 1 in x
0.520 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.520 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.520 * [taylor]: Taking taylor expansion of x in x
0.523 * [taylor]: Taking taylor expansion of 0 in x
0.528 * [taylor]: Taking taylor expansion of 0 in x
0.535 * [taylor]: Taking taylor expansion of 0 in x
0.542 * [taylor]: Taking taylor expansion of 0 in x
0.543 * * * * [progress]: [ 2 / 2 ] generating series at (2 2 1)
0.543 * [approximate]: Taking taylor expansion of (- (pow x 4) (pow y 2)) in (y x) around 0
0.543 * [taylor]: Taking taylor expansion of (- (pow x 4) (pow y 2)) in x
0.543 * [taylor]: Taking taylor expansion of (pow x 4) in x
0.543 * [taylor]: Taking taylor expansion of x in x
0.543 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.543 * [taylor]: Taking taylor expansion of y in x
0.543 * [taylor]: Taking taylor expansion of (- (pow x 4) (pow y 2)) in y
0.543 * [taylor]: Taking taylor expansion of (pow x 4) in y
0.543 * [taylor]: Taking taylor expansion of x in y
0.543 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.543 * [taylor]: Taking taylor expansion of y in y
0.543 * [taylor]: Taking taylor expansion of (- (pow x 4) (pow y 2)) in y
0.543 * [taylor]: Taking taylor expansion of (pow x 4) in y
0.543 * [taylor]: Taking taylor expansion of x in y
0.543 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.543 * [taylor]: Taking taylor expansion of y in y
0.543 * [taylor]: Taking taylor expansion of (pow x 4) in x
0.543 * [taylor]: Taking taylor expansion of x in x
0.544 * [taylor]: Taking taylor expansion of 0 in x
0.545 * [taylor]: Taking taylor expansion of -1 in x
0.547 * [taylor]: Taking taylor expansion of 0 in x
0.549 * [taylor]: Taking taylor expansion of 0 in x
0.550 * [approximate]: Taking taylor expansion of (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) in (y x) around 0
0.550 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) in x
0.550 * [taylor]: Taking taylor expansion of (/ 1 (pow x 4)) in x
0.550 * [taylor]: Taking taylor expansion of (pow x 4) in x
0.550 * [taylor]: Taking taylor expansion of x in x
0.551 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.551 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.551 * [taylor]: Taking taylor expansion of y in x
0.551 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) in y
0.551 * [taylor]: Taking taylor expansion of (/ 1 (pow x 4)) in y
0.551 * [taylor]: Taking taylor expansion of (pow x 4) in y
0.551 * [taylor]: Taking taylor expansion of x in y
0.551 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.551 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.551 * [taylor]: Taking taylor expansion of y in y
0.552 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) in y
0.552 * [taylor]: Taking taylor expansion of (/ 1 (pow x 4)) in y
0.552 * [taylor]: Taking taylor expansion of (pow x 4) in y
0.552 * [taylor]: Taking taylor expansion of x in y
0.552 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.552 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.552 * [taylor]: Taking taylor expansion of y in y
0.553 * [taylor]: Taking taylor expansion of -1 in x
0.554 * [taylor]: Taking taylor expansion of 0 in x
0.556 * [taylor]: Taking taylor expansion of (/ 1 (pow x 4)) in x
0.556 * [taylor]: Taking taylor expansion of (pow x 4) in x
0.556 * [taylor]: Taking taylor expansion of x in x
0.558 * [taylor]: Taking taylor expansion of 0 in x
0.562 * [taylor]: Taking taylor expansion of 0 in x
0.566 * [taylor]: Taking taylor expansion of 0 in x
0.571 * [taylor]: Taking taylor expansion of 0 in x
0.574 * [approximate]: Taking taylor expansion of (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) in (y x) around 0
0.574 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) in x
0.574 * [taylor]: Taking taylor expansion of (/ 1 (pow x 4)) in x
0.574 * [taylor]: Taking taylor expansion of (pow x 4) in x
0.574 * [taylor]: Taking taylor expansion of x in x
0.575 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.575 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.575 * [taylor]: Taking taylor expansion of y in x
0.575 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) in y
0.575 * [taylor]: Taking taylor expansion of (/ 1 (pow x 4)) in y
0.575 * [taylor]: Taking taylor expansion of (pow x 4) in y
0.575 * [taylor]: Taking taylor expansion of x in y
0.575 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.575 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.575 * [taylor]: Taking taylor expansion of y in y
0.576 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 4)) (/ 1 (pow y 2))) in y
0.576 * [taylor]: Taking taylor expansion of (/ 1 (pow x 4)) in y
0.576 * [taylor]: Taking taylor expansion of (pow x 4) in y
0.576 * [taylor]: Taking taylor expansion of x in y
0.576 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.576 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.576 * [taylor]: Taking taylor expansion of y in y
0.577 * [taylor]: Taking taylor expansion of -1 in x
0.578 * [taylor]: Taking taylor expansion of 0 in x
0.579 * [taylor]: Taking taylor expansion of (/ 1 (pow x 4)) in x
0.582 * [taylor]: Taking taylor expansion of (pow x 4) in x
0.582 * [taylor]: Taking taylor expansion of x in x
0.584 * [taylor]: Taking taylor expansion of 0 in x
0.588 * [taylor]: Taking taylor expansion of 0 in x
0.592 * [taylor]: Taking taylor expansion of 0 in x
0.598 * [taylor]: Taking taylor expansion of 0 in x
0.600 * * * [progress]: simplifying candidates
0.601 * [simplify]: Simplifying using  #<procedure:simplify-batch-egg> :
   (- (log (+ (- (* y y)) (pow x 4))) (log (+ (* x x) y)))
  (log (/ (+ (- (* y y)) (pow x 4)) (+ (* x x) y)))
  (exp (/ (+ (- (* y y)) (pow x 4)) (+ (* x x) y)))
  (/ (* (* (+ (- (* y y)) (pow x 4)) (+ (- (* y y)) (pow x 4))) (+ (- (* y y)) (pow x 4))) (* (* (+ (* x x) y) (+ (* x x) y)) (+ (* x x) y)))
  (* (cbrt (/ (+ (- (* y y)) (pow x 4)) (+ (* x x) y))) (cbrt (/ (+ (- (* y y)) (pow x 4)) (+ (* x x) y))))
  (cbrt (/ (+ (- (* y y)) (pow x 4)) (+ (* x x) y)))
  (* (* (/ (+ (- (* y y)) (pow x 4)) (+ (* x x) y)) (/ (+ (- (* y y)) (pow x 4)) (+ (* x x) y))) (/ (+ (- (* y y)) (pow x 4)) (+ (* x x) y)))
  (sqrt (/ (+ (- (* y y)) (pow x 4)) (+ (* x x) y)))
  (sqrt (/ (+ (- (* y y)) (pow x 4)) (+ (* x x) y)))
  (- (+ (- (* y y)) (pow x 4)))
  (- (+ (* x x) y))
  (/ 0 (+ (* x x) y))
  (/ (- (* y y) (pow x 4)) (+ (* x x) y))
  (/ (* (cbrt (+ (- (* y y)) (pow x 4))) (cbrt (+ (- (* y y)) (pow x 4)))) (* (cbrt (+ (* x x) y)) (cbrt (+ (* x x) y))))
  (/ (cbrt (+ (- (* y y)) (pow x 4))) (cbrt (+ (* x x) y)))
  (/ (* (cbrt (+ (- (* y y)) (pow x 4))) (cbrt (+ (- (* y y)) (pow x 4)))) (sqrt (+ (* x x) y)))
  (/ (cbrt (+ (- (* y y)) (pow x 4))) (sqrt (+ (* x x) y)))
  (/ (* (cbrt (+ (- (* y y)) (pow x 4))) (cbrt (+ (- (* y y)) (pow x 4)))) 1)
  (/ (cbrt (+ (- (* y y)) (pow x 4))) (+ (* x x) y))
  (/ (sqrt (+ (- (* y y)) (pow x 4))) (* (cbrt (+ (* x x) y)) (cbrt (+ (* x x) y))))
  (/ (sqrt (+ (- (* y y)) (pow x 4))) (cbrt (+ (* x x) y)))
  (/ (sqrt (+ (- (* y y)) (pow x 4))) (sqrt (+ (* x x) y)))
  (/ (sqrt (+ (- (* y y)) (pow x 4))) (sqrt (+ (* x x) y)))
  (/ (sqrt (+ (- (* y y)) (pow x 4))) 1)
  (/ (sqrt (+ (- (* y y)) (pow x 4))) (+ (* x x) y))
  (/ 1 (* (cbrt (+ (* x x) y)) (cbrt (+ (* x x) y))))
  (/ (+ (- (* y y)) (pow x 4)) (cbrt (+ (* x x) y)))
  (/ 1 (sqrt (+ (* x x) y)))
  (/ (+ (- (* y y)) (pow x 4)) (sqrt (+ (* x x) y)))
  (/ 1 1)
  (/ (+ (- (* y y)) (pow x 4)) (+ (* x x) y))
  (/ 1 (* (cbrt (+ (* x x) y)) (cbrt (+ (* x x) y))))
  (/ (+ (- (* y y)) (pow x 4)) (cbrt (+ (* x x) y)))
  (/ 1 (sqrt (+ (* x x) y)))
  (/ (+ (- (* y y)) (pow x 4)) (sqrt (+ (* x x) y)))
  (/ 1 1)
  (/ (+ (- (* y y)) (pow x 4)) (+ (* x x) y))
  (/ 1 (+ (* x x) y))
  (/ (+ (* x x) y) (+ (- (* y y)) (pow x 4)))
  (/ (+ (- (* y y)) (pow x 4)) (* (cbrt (+ (* x x) y)) (cbrt (+ (* x x) y))))
  (/ (+ (- (* y y)) (pow x 4)) (sqrt (+ (* x x) y)))
  (/ (+ (- (* y y)) (pow x 4)) 1)
  (/ (+ (* x x) y) (cbrt (+ (- (* y y)) (pow x 4))))
  (/ (+ (* x x) y) (sqrt (+ (- (* y y)) (pow x 4))))
  (/ (+ (* x x) y) (+ (- (* y y)) (pow x 4)))
  (/ (+ (* x x) y) (+ (- (* y y)) (pow x 4)))
  (/ (+ (- (* y y)) (pow x 4)) (+ (pow (* x x) 3) (pow y 3)))
  (/ (+ (- (* y y)) (pow x 4)) (- (* (* x x) (* x x)) (* y y)))
  (* (+ (* x x) y) (+ (* (- (* y y)) (- (* y y))) (- (* (pow x 4) (pow x 4)) (* (- (* y y)) (pow x 4)))))
  (* (+ (* x x) y) (- (- (* y y)) (pow x 4)))
  (* (/ 1 (exp (* y y))) (exp (pow x 4)))
  (* (exp (- (* y y))) (exp (pow x 4)))
  (log (+ (- (* y y)) (pow x 4)))
  (exp (+ (- (* y y)) (pow x 4)))
  (* (cbrt (+ (- (* y y)) (pow x 4))) (cbrt (+ (- (* y y)) (pow x 4))))
  (cbrt (+ (- (* y y)) (pow x 4)))
  (* (* (+ (- (* y y)) (pow x 4)) (+ (- (* y y)) (pow x 4))) (+ (- (* y y)) (pow x 4)))
  (sqrt (+ (- (* y y)) (pow x 4)))
  (sqrt (+ (- (* y y)) (pow x 4)))
  (+ (pow (- (* y y)) 3) (pow (pow x 4) 3))
  (+ (* (- (* y y)) (- (* y y))) (- (* (pow x 4) (pow x 4)) (* (- (* y y)) (pow x 4))))
  (- (* (- (* y y)) (- (* y y))) (* (pow x 4) (pow x 4)))
  (- (- (* y y)) (pow x 4))
  (+ (- (* y y)) (pow x 4))
  (- (* y y) (pow x 4))
  (- (pow x 2) y)
  (- (pow x 2) y)
  (- (pow x 2) y)
  (* -1 (pow y 2))
  (- (pow x 4) (pow y 2))
  (- (pow x 4) (pow y 2))
0.606 * * [simplify]: iteration  0 :  241  enodes  (cost  527 )
0.612 * * [simplify]: iteration  1 :  1242  enodes  (cost  460 )
0.640 * * [simplify]: iteration  2 :  5002  enodes  (cost  442 )
0.643 * [simplify]: Simplified to:
   (log (/ (+ (- (* y y)) (pow x 4)) (+ (* x x) y)))
  (log (/ (+ (- (* y y)) (pow x 4)) (+ (* x x) y)))
  (exp (/ (+ (- (* y y)) (pow x 4)) (+ (* x x) y)))
  (pow (/ (- (pow x 4) (pow y 2)) (+ (* x x) y)) 3)
  (* (cbrt (/ (+ (- (* y y)) (pow x 4)) (+ (* x x) y))) (cbrt (/ (+ (- (* y y)) (pow x 4)) (+ (* x x) y))))
  (cbrt (/ (+ (- (* y y)) (pow x 4)) (+ (* x x) y)))
  (pow (/ (- (pow x 4) (pow y 2)) (+ (* x x) y)) 3)
  (sqrt (/ (+ (- (* y y)) (pow x 4)) (+ (* x x) y)))
  (sqrt (/ (+ (- (* y y)) (pow x 4)) (+ (* x x) y)))
  (- (pow y 2) (pow x 4))
  (- (+ (* x x) y))
  0
  (/ (- (* y y) (pow x 4)) (+ (* x x) y))
  (/ (* (cbrt (+ (- (* y y)) (pow x 4))) (cbrt (+ (- (* y y)) (pow x 4)))) (* (cbrt (+ (* x x) y)) (cbrt (+ (* x x) y))))
  (/ (cbrt (+ (- (* y y)) (pow x 4))) (cbrt (+ (* x x) y)))
  (/ (* (cbrt (+ (- (* y y)) (pow x 4))) (cbrt (+ (- (* y y)) (pow x 4)))) (sqrt (+ (* x x) y)))
  (/ (cbrt (+ (- (* y y)) (pow x 4))) (sqrt (+ (* x x) y)))
  (* (cbrt (+ (- (* y y)) (pow x 4))) (cbrt (+ (- (* y y)) (pow x 4))))
  (/ (cbrt (+ (- (* y y)) (pow x 4))) (+ (* x x) y))
  (/ (sqrt (+ (- (* y y)) (pow x 4))) (* (cbrt (+ (* x x) y)) (cbrt (+ (* x x) y))))
  (/ (sqrt (+ (- (* y y)) (pow x 4))) (cbrt (+ (* x x) y)))
  (/ (sqrt (+ (- (* y y)) (pow x 4))) (sqrt (+ (* x x) y)))
  (/ (sqrt (+ (- (* y y)) (pow x 4))) (sqrt (+ (* x x) y)))
  (sqrt (+ (- (* y y)) (pow x 4)))
  (/ (sqrt (+ (- (* y y)) (pow x 4))) (+ (* x x) y))
  (/ 1 (* (cbrt (+ (* x x) y)) (cbrt (+ (* x x) y))))
  (/ (- (pow x 4) (pow y 2)) (cbrt (+ (* x x) y)))
  (/ 1 (sqrt (+ (* x x) y)))
  (/ (- (pow x 4) (pow y 2)) (sqrt (+ (* x x) y)))
  1
  (/ (- (pow x 4) (pow y 2)) (+ (* x x) y))
  (/ 1 (* (cbrt (+ (* x x) y)) (cbrt (+ (* x x) y))))
  (/ (- (pow x 4) (pow y 2)) (cbrt (+ (* x x) y)))
  (/ 1 (sqrt (+ (* x x) y)))
  (/ (- (pow x 4) (pow y 2)) (sqrt (+ (* x x) y)))
  1
  (/ (- (pow x 4) (pow y 2)) (+ (* x x) y))
  (/ 1 (+ (* x x) y))
  (/ 1 (- (pow x 2) y))
  (/ (/ (- (pow x 4) (pow y 2)) (cbrt (+ (* x x) y))) (cbrt (+ (* x x) y)))
  (/ (- (pow x 4) (pow y 2)) (sqrt (+ (* x x) y)))
  (- (pow x 4) (pow y 2))
  (/ (+ (* x x) y) (cbrt (+ (- (* y y)) (pow x 4))))
  (/ (+ (* x x) y) (sqrt (+ (- (* y y)) (pow x 4))))
  (/ 1 (- (pow x 2) y))
  (/ 1 (- (pow x 2) y))
  (/ (- (pow x 4) (pow y 2)) (+ (pow (* x x) 3) (pow y 3)))
  1
  (* (- (+ (* (pow y 2) (pow y 2)) (pow x 8)) (* (- (* y y)) (pow x 4))) (+ (* x x) y))
  (* (+ (* x x) y) (- (- (* y y)) (pow x 4)))
  (exp (- (pow x 4) (pow y 2)))
  (exp (- (pow x 4) (pow y 2)))
  (log (- (pow x 4) (pow y 2)))
  (exp (- (pow x 4) (pow y 2)))
  (* (cbrt (+ (- (* y y)) (pow x 4))) (cbrt (+ (- (* y y)) (pow x 4))))
  (cbrt (+ (- (* y y)) (pow x 4)))
  (pow (- (pow x 4) (pow y 2)) 3)
  (sqrt (+ (- (* y y)) (pow x 4)))
  (sqrt (+ (- (* y y)) (pow x 4)))
  (- (pow (pow x 4) 3) (pow (pow y 2) 3))
  (+ (pow x 8) (+ (* (pow y 2) (pow x 4)) (pow y 4)))
  (+ (- (pow x 8)) (pow y 4))
  (- (- (* y y)) (pow x 4))
  (- (pow x 4) (pow y 2))
  (- (pow y 2) (pow x 4))
  (- (pow x 2) y)
  (- (pow x 2) y)
  (- (pow x 2) y)
  (* -1 (pow y 2))
  (- (pow x 4) (pow y 2))
  (- (pow x 4) (pow y 2))
0.644 * * * [progress]: adding candidates to table
0.762 * [progress]: [Phase 3 of 3] Extracting.
0.762 * * [regime]: Finding splitpoints for: (#<alt (λ (x y) (* 0.5 (- (* x x) y)))> #<alt (λ (x y) (* 0.5 (/ (+ (- (* y y)) (pow x 4)) (+ (* x x) y))))>)
0.762 * * * [regime-changes]: Trying 5 branch expressions: ((* x x) (- (* x x) y) (* 0.5 (- (* x x) y)) y x)
0.763 * * * * [regimes]: Trying to branch on (* x x) from (#<alt (λ (x y) (* 0.5 (- (* x x) y)))> #<alt (λ (x y) (* 0.5 (/ (+ (- (* y y)) (pow x 4)) (+ (* x x) y))))>)
0.778 * * * * [regimes]: Trying to branch on (- (* x x) y) from (#<alt (λ (x y) (* 0.5 (- (* x x) y)))> #<alt (λ (x y) (* 0.5 (/ (+ (- (* y y)) (pow x 4)) (+ (* x x) y))))>)
0.790 * * * * [regimes]: Trying to branch on (* 0.5 (- (* x x) y)) from (#<alt (λ (x y) (* 0.5 (- (* x x) y)))> #<alt (λ (x y) (* 0.5 (/ (+ (- (* y y)) (pow x 4)) (+ (* x x) y))))>)
0.802 * * * * [regimes]: Trying to branch on y from (#<alt (λ (x y) (* 0.5 (- (* x x) y)))> #<alt (λ (x y) (* 0.5 (/ (+ (- (* y y)) (pow x 4)) (+ (* x x) y))))>)
0.817 * * * * [regimes]: Trying to branch on x from (#<alt (λ (x y) (* 0.5 (- (* x x) y)))> #<alt (λ (x y) (* 0.5 (/ (+ (- (* y y)) (pow x 4)) (+ (* x x) y))))>)
0.828 * * * [regime]: Found split indices: #<option (#s(si 0 255))>
0.829 * [simplify]: Simplifying using  #<procedure:simplify-batch-egg> :
   (* 0.5 (- (* x x) y))
0.830 * * [simplify]: iteration  0 :  7  enodes  (cost  3 )
0.830 * * [simplify]: iteration  1 :  7  enodes  (cost  3 )
0.830 * [simplify]: Simplified to:
   (* 0.5 (- (* x x) y))
1.278 * [regime-testing]: Baseline error score: 0.013916980634440227
1.279 * [regime-testing]: Oracle error score: 0.01204174623013969
1.280 * [regime-testing]: End program error score: 0.013916980634440227