4.791 * [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 )
0.033 * * [simplify]: iteration  4 :  93  enodes  (cost  7 )
0.049 * * [simplify]: iteration  5 :  144  enodes  (cost  7 )
0.078 * * [simplify]: iteration  6 :  209  enodes  (cost  7 )
0.122 * * [simplify]: iteration  7 :  321  enodes  (cost  7 )
0.294 * * [simplify]: iteration  8 :  1065  enodes  (cost  7 )
1.387 * * [simplify]: iteration  done :  5000  enodes  (cost  7 )
1.387 * [simplify]: Simplified to:
   (* (+ x y) (- x y))
1.388 * * [progress]: iteration 1 / 4
1.388 * * * [progress]: picking best candidate
1.389 * * * * [pick]: Picked  #<alt (λ (x y) (* (+ x y) (- x y)))>
1.389 * * * [progress]: localizing error
1.394 * * * [progress]: generating rewritten candidates
1.395 * * * * [progress]: [ 1 / 1 ] rewriting at (2)
1.418 * * * [progress]: generating series expansions
1.418 * * * * [progress]: [ 1 / 1 ] generating series at (2)
1.418 * [approximate]: Taking taylor expansion of (* (+ x y) (- x y)) in (x y) around 0
1.418 * [taylor]: Taking taylor expansion of (* (+ x y) (- x y)) in y
1.418 * [taylor]: Taking taylor expansion of (+ x y) in y
1.418 * [taylor]: Taking taylor expansion of x in y
1.418 * [taylor]: Taking taylor expansion of y in y
1.418 * [taylor]: Taking taylor expansion of (- x y) in y
1.418 * [taylor]: Taking taylor expansion of x in y
1.418 * [taylor]: Taking taylor expansion of y in y
1.418 * [taylor]: Taking taylor expansion of (* (+ x y) (- x y)) in x
1.418 * [taylor]: Taking taylor expansion of (+ x y) in x
1.418 * [taylor]: Taking taylor expansion of x in x
1.418 * [taylor]: Taking taylor expansion of y in x
1.418 * [taylor]: Taking taylor expansion of (- x y) in x
1.418 * [taylor]: Taking taylor expansion of x in x
1.418 * [taylor]: Taking taylor expansion of y in x
1.418 * [taylor]: Taking taylor expansion of (* (+ x y) (- x y)) in x
1.418 * [taylor]: Taking taylor expansion of (+ x y) in x
1.418 * [taylor]: Taking taylor expansion of x in x
1.418 * [taylor]: Taking taylor expansion of y in x
1.418 * [taylor]: Taking taylor expansion of (- x y) in x
1.418 * [taylor]: Taking taylor expansion of x in x
1.418 * [taylor]: Taking taylor expansion of y in x
1.419 * [taylor]: Taking taylor expansion of (* -1 (pow y 2)) in y
1.419 * [taylor]: Taking taylor expansion of -1 in y
1.419 * [taylor]: Taking taylor expansion of (pow y 2) in y
1.419 * [taylor]: Taking taylor expansion of y in y
1.420 * [taylor]: Taking taylor expansion of 0 in y
1.421 * [taylor]: Taking taylor expansion of 1 in y
1.423 * [taylor]: Taking taylor expansion of 0 in y
1.425 * [taylor]: Taking taylor expansion of 0 in y
1.426 * [approximate]: Taking taylor expansion of (* (- (/ 1 x) (/ 1 y)) (+ (/ 1 y) (/ 1 x))) in (x y) around 0
1.426 * [taylor]: Taking taylor expansion of (* (- (/ 1 x) (/ 1 y)) (+ (/ 1 y) (/ 1 x))) in y
1.426 * [taylor]: Taking taylor expansion of (- (/ 1 x) (/ 1 y)) in y
1.426 * [taylor]: Taking taylor expansion of (/ 1 x) in y
1.426 * [taylor]: Taking taylor expansion of x in y
1.426 * [taylor]: Taking taylor expansion of (/ 1 y) in y
1.426 * [taylor]: Taking taylor expansion of y in y
1.426 * [taylor]: Taking taylor expansion of (+ (/ 1 y) (/ 1 x)) in y
1.426 * [taylor]: Taking taylor expansion of (/ 1 y) in y
1.426 * [taylor]: Taking taylor expansion of y in y
1.427 * [taylor]: Taking taylor expansion of (/ 1 x) in y
1.427 * [taylor]: Taking taylor expansion of x in y
1.427 * [taylor]: Taking taylor expansion of (* (- (/ 1 x) (/ 1 y)) (+ (/ 1 y) (/ 1 x))) in x
1.427 * [taylor]: Taking taylor expansion of (- (/ 1 x) (/ 1 y)) in x
1.427 * [taylor]: Taking taylor expansion of (/ 1 x) in x
1.427 * [taylor]: Taking taylor expansion of x in x
1.427 * [taylor]: Taking taylor expansion of (/ 1 y) in x
1.427 * [taylor]: Taking taylor expansion of y in x
1.427 * [taylor]: Taking taylor expansion of (+ (/ 1 y) (/ 1 x)) in x
1.427 * [taylor]: Taking taylor expansion of (/ 1 y) in x
1.427 * [taylor]: Taking taylor expansion of y in x
1.427 * [taylor]: Taking taylor expansion of (/ 1 x) in x
1.427 * [taylor]: Taking taylor expansion of x in x
1.428 * [taylor]: Taking taylor expansion of (* (- (/ 1 x) (/ 1 y)) (+ (/ 1 y) (/ 1 x))) in x
1.428 * [taylor]: Taking taylor expansion of (- (/ 1 x) (/ 1 y)) in x
1.428 * [taylor]: Taking taylor expansion of (/ 1 x) in x
1.428 * [taylor]: Taking taylor expansion of x in x
1.428 * [taylor]: Taking taylor expansion of (/ 1 y) in x
1.428 * [taylor]: Taking taylor expansion of y in x
1.428 * [taylor]: Taking taylor expansion of (+ (/ 1 y) (/ 1 x)) in x
1.428 * [taylor]: Taking taylor expansion of (/ 1 y) in x
1.428 * [taylor]: Taking taylor expansion of y in x
1.428 * [taylor]: Taking taylor expansion of (/ 1 x) in x
1.428 * [taylor]: Taking taylor expansion of x in x
1.430 * [taylor]: Taking taylor expansion of 1 in y
1.431 * [taylor]: Taking taylor expansion of 0 in y
1.434 * [taylor]: Taking taylor expansion of (- (/ 1 (pow y 2))) in y
1.434 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
1.434 * [taylor]: Taking taylor expansion of (pow y 2) in y
1.434 * [taylor]: Taking taylor expansion of y in y
1.437 * [taylor]: Taking taylor expansion of 0 in y
1.441 * [taylor]: Taking taylor expansion of 0 in y
1.443 * [approximate]: Taking taylor expansion of (* -1 (* (+ (/ 1 y) (/ 1 x)) (- (/ 1 y) (/ 1 x)))) in (x y) around 0
1.443 * [taylor]: Taking taylor expansion of (* -1 (* (+ (/ 1 y) (/ 1 x)) (- (/ 1 y) (/ 1 x)))) in y
1.443 * [taylor]: Taking taylor expansion of -1 in y
1.443 * [taylor]: Taking taylor expansion of (* (+ (/ 1 y) (/ 1 x)) (- (/ 1 y) (/ 1 x))) in y
1.443 * [taylor]: Taking taylor expansion of (+ (/ 1 y) (/ 1 x)) in y
1.443 * [taylor]: Taking taylor expansion of (/ 1 y) in y
1.443 * [taylor]: Taking taylor expansion of y in y
1.444 * [taylor]: Taking taylor expansion of (/ 1 x) in y
1.444 * [taylor]: Taking taylor expansion of x in y
1.444 * [taylor]: Taking taylor expansion of (- (/ 1 y) (/ 1 x)) in y
1.444 * [taylor]: Taking taylor expansion of (/ 1 y) in y
1.444 * [taylor]: Taking taylor expansion of y in y
1.444 * [taylor]: Taking taylor expansion of (/ 1 x) in y
1.444 * [taylor]: Taking taylor expansion of x in y
1.444 * [taylor]: Taking taylor expansion of (* -1 (* (+ (/ 1 y) (/ 1 x)) (- (/ 1 y) (/ 1 x)))) in x
1.444 * [taylor]: Taking taylor expansion of -1 in x
1.444 * [taylor]: Taking taylor expansion of (* (+ (/ 1 y) (/ 1 x)) (- (/ 1 y) (/ 1 x))) in x
1.444 * [taylor]: Taking taylor expansion of (+ (/ 1 y) (/ 1 x)) in x
1.444 * [taylor]: Taking taylor expansion of (/ 1 y) in x
1.444 * [taylor]: Taking taylor expansion of y in x
1.444 * [taylor]: Taking taylor expansion of (/ 1 x) in x
1.444 * [taylor]: Taking taylor expansion of x in x
1.445 * [taylor]: Taking taylor expansion of (- (/ 1 y) (/ 1 x)) in x
1.445 * [taylor]: Taking taylor expansion of (/ 1 y) in x
1.445 * [taylor]: Taking taylor expansion of y in x
1.445 * [taylor]: Taking taylor expansion of (/ 1 x) in x
1.445 * [taylor]: Taking taylor expansion of x in x
1.445 * [taylor]: Taking taylor expansion of (* -1 (* (+ (/ 1 y) (/ 1 x)) (- (/ 1 y) (/ 1 x)))) in x
1.445 * [taylor]: Taking taylor expansion of -1 in x
1.445 * [taylor]: Taking taylor expansion of (* (+ (/ 1 y) (/ 1 x)) (- (/ 1 y) (/ 1 x))) in x
1.445 * [taylor]: Taking taylor expansion of (+ (/ 1 y) (/ 1 x)) in x
1.445 * [taylor]: Taking taylor expansion of (/ 1 y) in x
1.445 * [taylor]: Taking taylor expansion of y in x
1.445 * [taylor]: Taking taylor expansion of (/ 1 x) in x
1.445 * [taylor]: Taking taylor expansion of x in x
1.445 * [taylor]: Taking taylor expansion of (- (/ 1 y) (/ 1 x)) in x
1.446 * [taylor]: Taking taylor expansion of (/ 1 y) in x
1.446 * [taylor]: Taking taylor expansion of y in x
1.446 * [taylor]: Taking taylor expansion of (/ 1 x) in x
1.446 * [taylor]: Taking taylor expansion of x in x
1.447 * [taylor]: Taking taylor expansion of 1 in y
1.449 * [taylor]: Taking taylor expansion of 0 in y
1.452 * [taylor]: Taking taylor expansion of (- (/ 1 (pow y 2))) in y
1.452 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
1.452 * [taylor]: Taking taylor expansion of (pow y 2) in y
1.452 * [taylor]: Taking taylor expansion of y in y
1.456 * [taylor]: Taking taylor expansion of 0 in y
1.462 * [taylor]: Taking taylor expansion of 0 in y
1.463 * * * [progress]: simplifying candidates
1.464 * [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))
1.466 * * [simplify]: iteration  0 :  70  enodes  (cost  436 )
1.481 * * [simplify]: iteration  1 :  194  enodes  (cost  423 )
1.530 * * [simplify]: iteration  2 :  801  enodes  (cost  395 )
2.211 * * [simplify]: iteration  3 :  4567  enodes  (cost  395 )
4.157 * * [simplify]: iteration  done :  5000  enodes  (cost  395 )
4.158 * [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))
4.158 * * * [progress]: adding candidates to table
4.235 * * [progress]: iteration 2 / 4
4.235 * * * [progress]: picking best candidate
4.237 * * * * [pick]: Picked  #<alt (λ (x y) (- (pow x 2) (pow y 2)))>
4.237 * * * [progress]: localizing error
4.243 * * * [progress]: generating rewritten candidates
4.243 * * * * [progress]: [ 1 / 1 ] rewriting at (2)
4.258 * * * [progress]: generating series expansions
4.258 * * * * [progress]: [ 1 / 1 ] generating series at (2)
4.258 * [approximate]: Taking taylor expansion of (- (pow x 2) (pow y 2)) in (x y) around 0
4.258 * [taylor]: Taking taylor expansion of (- (pow x 2) (pow y 2)) in y
4.258 * [taylor]: Taking taylor expansion of (pow x 2) in y
4.258 * [taylor]: Taking taylor expansion of x in y
4.258 * [taylor]: Taking taylor expansion of (pow y 2) in y
4.258 * [taylor]: Taking taylor expansion of y in y
4.258 * [taylor]: Taking taylor expansion of (- (pow x 2) (pow y 2)) in x
4.258 * [taylor]: Taking taylor expansion of (pow x 2) in x
4.258 * [taylor]: Taking taylor expansion of x in x
4.258 * [taylor]: Taking taylor expansion of (pow y 2) in x
4.258 * [taylor]: Taking taylor expansion of y in x
4.258 * [taylor]: Taking taylor expansion of (- (pow x 2) (pow y 2)) in x
4.258 * [taylor]: Taking taylor expansion of (pow x 2) in x
4.258 * [taylor]: Taking taylor expansion of x in x
4.258 * [taylor]: Taking taylor expansion of (pow y 2) in x
4.258 * [taylor]: Taking taylor expansion of y in x
4.259 * [taylor]: Taking taylor expansion of (- (pow y 2)) in y
4.259 * [taylor]: Taking taylor expansion of (pow y 2) in y
4.259 * [taylor]: Taking taylor expansion of y in y
4.259 * [taylor]: Taking taylor expansion of 0 in y
4.261 * [taylor]: Taking taylor expansion of 1 in y
4.262 * [taylor]: Taking taylor expansion of 0 in y
4.265 * [taylor]: Taking taylor expansion of 0 in y
4.265 * [approximate]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in (x y) around 0
4.266 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in y
4.266 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in y
4.266 * [taylor]: Taking taylor expansion of (pow x 2) in y
4.266 * [taylor]: Taking taylor expansion of x in y
4.266 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
4.266 * [taylor]: Taking taylor expansion of (pow y 2) in y
4.266 * [taylor]: Taking taylor expansion of y in y
4.266 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in x
4.266 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
4.266 * [taylor]: Taking taylor expansion of (pow x 2) in x
4.266 * [taylor]: Taking taylor expansion of x in x
4.267 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
4.267 * [taylor]: Taking taylor expansion of (pow y 2) in x
4.267 * [taylor]: Taking taylor expansion of y in x
4.267 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in x
4.267 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
4.267 * [taylor]: Taking taylor expansion of (pow x 2) in x
4.267 * [taylor]: Taking taylor expansion of x in x
4.268 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
4.268 * [taylor]: Taking taylor expansion of (pow y 2) in x
4.268 * [taylor]: Taking taylor expansion of y in x
4.268 * [taylor]: Taking taylor expansion of 1 in y
4.269 * [taylor]: Taking taylor expansion of 0 in y
4.271 * [taylor]: Taking taylor expansion of (- (/ 1 (pow y 2))) in y
4.271 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
4.271 * [taylor]: Taking taylor expansion of (pow y 2) in y
4.271 * [taylor]: Taking taylor expansion of y in y
4.274 * [taylor]: Taking taylor expansion of 0 in y
4.277 * [taylor]: Taking taylor expansion of 0 in y
4.279 * [approximate]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in (x y) around 0
4.279 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in y
4.279 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in y
4.279 * [taylor]: Taking taylor expansion of (pow x 2) in y
4.279 * [taylor]: Taking taylor expansion of x in y
4.279 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
4.279 * [taylor]: Taking taylor expansion of (pow y 2) in y
4.279 * [taylor]: Taking taylor expansion of y in y
4.280 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in x
4.280 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
4.280 * [taylor]: Taking taylor expansion of (pow x 2) in x
4.280 * [taylor]: Taking taylor expansion of x in x
4.281 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
4.281 * [taylor]: Taking taylor expansion of (pow y 2) in x
4.281 * [taylor]: Taking taylor expansion of y in x
4.281 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (/ 1 (pow y 2))) in x
4.281 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
4.281 * [taylor]: Taking taylor expansion of (pow x 2) in x
4.281 * [taylor]: Taking taylor expansion of x in x
4.282 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
4.282 * [taylor]: Taking taylor expansion of (pow y 2) in x
4.282 * [taylor]: Taking taylor expansion of y in x
4.282 * [taylor]: Taking taylor expansion of 1 in y
4.283 * [taylor]: Taking taylor expansion of 0 in y
4.285 * [taylor]: Taking taylor expansion of (- (/ 1 (pow y 2))) in y
4.285 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
4.285 * [taylor]: Taking taylor expansion of (pow y 2) in y
4.285 * [taylor]: Taking taylor expansion of y in y
4.288 * [taylor]: Taking taylor expansion of 0 in y
4.291 * [taylor]: Taking taylor expansion of 0 in y
4.293 * * * [progress]: simplifying candidates
4.294 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (/ (exp (pow x 2)) (exp (pow y 2)))
  (log (- (pow x 2) (pow y 2)))
  (exp (- (pow x 2) (pow y 2)))
  (* (cbrt (- (pow x 2) (pow y 2))) (cbrt (- (pow x 2) (pow y 2))))
  (cbrt (- (pow x 2) (pow y 2)))
  (* (* (- (pow x 2) (pow y 2)) (- (pow x 2) (pow y 2))) (- (pow x 2) (pow y 2)))
  (sqrt (- (pow x 2) (pow y 2)))
  (sqrt (- (pow x 2) (pow y 2)))
  (- (pow (pow x 2) 3) (pow (pow y 2) 3))
  (+ (* (pow x 2) (pow x 2)) (+ (* (pow y 2) (pow y 2)) (* (pow x 2) (pow y 2))))
  (- (pow y 2))
  (- (* (pow x 2) (pow x 2)) (* (pow y 2) (pow y 2)))
  (+ (pow x 2) (pow y 2))
  (+ (pow (sqrt x) 2) (pow (sqrt y) 2))
  (- (pow (sqrt x) 2) (pow (sqrt y) 2))
  (+ (pow (sqrt x) 2) y)
  (- (pow (sqrt x) 2) y)
  (+ (pow (sqrt x) 2) (sqrt (pow y 2)))
  (- (pow (sqrt x) 2) (sqrt (pow y 2)))
  (+ (pow (sqrt x) 2) (pow y (/ 2 2)))
  (- (pow (sqrt x) 2) (pow y (/ 2 2)))
  (+ x (pow (sqrt y) 2))
  (- x (pow (sqrt y) 2))
  (+ x y)
  (- x y)
  (+ x (sqrt (pow y 2)))
  (- x (sqrt (pow y 2)))
  (+ x (pow y (/ 2 2)))
  (- x (pow y (/ 2 2)))
  (+ (sqrt (pow x 2)) (pow (sqrt y) 2))
  (- (sqrt (pow x 2)) (pow (sqrt y) 2))
  (+ (sqrt (pow x 2)) y)
  (- (sqrt (pow x 2)) y)
  (+ (sqrt (pow x 2)) (sqrt (pow y 2)))
  (- (sqrt (pow x 2)) (sqrt (pow y 2)))
  (+ (sqrt (pow x 2)) (pow y (/ 2 2)))
  (- (sqrt (pow x 2)) (pow y (/ 2 2)))
  (+ (pow x (/ 2 2)) (pow (sqrt y) 2))
  (- (pow x (/ 2 2)) (pow (sqrt y) 2))
  (+ (pow x (/ 2 2)) y)
  (- (pow x (/ 2 2)) y)
  (+ (pow x (/ 2 2)) (sqrt (pow y 2)))
  (- (pow x (/ 2 2)) (sqrt (pow y 2)))
  (+ (pow x (/ 2 2)) (pow y (/ 2 2)))
  (- (pow x (/ 2 2)) (pow y (/ 2 2)))
  (- (pow x 2) (pow y 2))
  (- (pow x 2) (pow y 2))
  (- (pow y 2))
  (- (pow x 2) (pow y 2))
  (- (pow x 2) (pow y 2))
  (- (pow x 2) (pow y 2))
4.296 * * [simplify]: iteration  0 :  69  enodes  (cost  444 )
4.306 * * [simplify]: iteration  1 :  150  enodes  (cost  395 )
4.350 * * [simplify]: iteration  2 :  401  enodes  (cost  269 )
4.460 * * [simplify]: iteration  3 :  1048  enodes  (cost  265 )
4.912 * * [simplify]: iteration  done :  5000  enodes  (cost  265 )
4.912 * [simplify]: Simplified to:
   (exp (- (pow x 2) (pow y 2)))
  (log (- (pow x 2) (pow y 2)))
  (exp (- (pow x 2) (pow y 2)))
  (* (cbrt (- (pow x 2) (pow y 2))) (cbrt (- (pow x 2) (pow y 2))))
  (cbrt (- (pow x 2) (pow y 2)))
  (pow (- (pow x 2) (pow y 2)) 3)
  (sqrt (- (pow x 2) (pow y 2)))
  (sqrt (- (pow x 2) (pow y 2)))
  (- (pow x 6) (pow y 6))
  (+ (pow x 4) (* (pow y 2) (+ (pow x 2) (pow y 2))))
  (- (pow y 2))
  (- (pow x 4) (pow y 4))
  (+ (pow x 2) (pow y 2))
  (+ y x)
  (- x y)
  (+ y x)
  (- x y)
  (+ (fabs y) x)
  (- x (fabs y))
  (+ y x)
  (- x y)
  (+ y x)
  (- x y)
  (+ y x)
  (- x y)
  (+ (fabs y) x)
  (- x (fabs y))
  (+ y x)
  (- x y)
  (+ y (fabs x))
  (- (fabs x) y)
  (+ y (fabs x))
  (- (fabs x) y)
  (+ (fabs x) (fabs y))
  (- (fabs x) (fabs y))
  (+ y (fabs x))
  (- (fabs x) y)
  (+ y x)
  (- x y)
  (+ y x)
  (- x y)
  (+ (fabs y) x)
  (- x (fabs y))
  (+ y x)
  (- x y)
  (- (pow x 2) (pow y 2))
  (- (pow x 2) (pow y 2))
  (- (pow y 2))
  (- (pow x 2) (pow y 2))
  (- (pow x 2) (pow y 2))
  (- (pow x 2) (pow y 2))
4.913 * * * [progress]: adding candidates to table
4.960 * [progress]: [Phase 3 of 3] Extracting.
4.960 * * [regime]: Finding splitpoints for: (#<alt (λ (x y) (* (+ x y) (- x y)))> #<alt (λ (x y) (- (pow x 2) (pow y 2)))>)
4.960 * * * [regime-changes]: Trying 3 branch expressions: ((* (+ x y) (- x y)) y x)
4.960 * * * * [regimes]: Trying to branch on (* (+ x y) (- x y)) from (#<alt (λ (x y) (* (+ x y) (- x y)))> #<alt (λ (x y) (- (pow x 2) (pow y 2)))>)
4.972 * * * * [regimes]: Trying to branch on y from (#<alt (λ (x y) (* (+ x y) (- x y)))> #<alt (λ (x y) (- (pow x 2) (pow y 2)))>)
4.983 * * * * [regimes]: Trying to branch on x from (#<alt (λ (x y) (* (+ x y) (- x y)))> #<alt (λ (x y) (- (pow x 2) (pow y 2)))>)
4.997 * * * [regime]: Found split indices: #<option (#s(si 0 255))>
4.997 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (* (+ x y) (- x y))
4.997 * * [simplify]: iteration  0 :  5  enodes  (cost  7 )
4.997 * * [simplify]: iteration  1 :  7  enodes  (cost  7 )
4.998 * * [simplify]: iteration  done :  7  enodes  (cost  7 )
4.998 * [simplify]: Simplified to:
   (* (+ x y) (- x y))
5.545 * [regime-testing]: Baseline error score: 0.0016252031503937992
5.545 * [regime-testing]: Oracle error score: 0.00025003125390673836
5.546 * [regime-testing]: End program error score: 0.0016252031503937992