15.608 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.014 * * * [progress]: [2/2] Setting up program.
0.016 * [progress]: [Phase 2 of 3] Improving.
0.016 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y)))
0.017 * * [simplify]: iteration  0 :  9  enodes  (cost  19 )
0.018 * * [simplify]: iteration  1 :  17  enodes  (cost  19 )
0.020 * * [simplify]: iteration  2 :  35  enodes  (cost  19 )
0.025 * * [simplify]: iteration  3 :  70  enodes  (cost  19 )
0.034 * * [simplify]: iteration  4 :  119  enodes  (cost  19 )
0.052 * * [simplify]: iteration  5 :  167  enodes  (cost  19 )
0.075 * * [simplify]: iteration  6 :  187  enodes  (cost  19 )
0.103 * * [simplify]: iteration  7 :  188  enodes  (cost  19 )
0.132 * * [simplify]: iteration  done :  188  enodes  (cost  19 )
0.133 * [simplify]: Simplified to:
   (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y)))
0.133 * * [progress]: iteration 1 / 4
0.133 * * * [progress]: picking best candidate
0.135 * * * * [pick]: Picked  #<alt (λ (x y) (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))))>
0.135 * * * [progress]: localizing error
0.142 * * * [progress]: generating rewritten candidates
0.142 * * * * [progress]: [ 1 / 2 ] rewriting at (2)
0.153 * * * * [progress]: [ 2 / 2 ] rewriting at (2 1)
0.156 * * * [progress]: generating series expansions
0.156 * * * * [progress]: [ 1 / 2 ] generating series at (2)
0.157 * [approximate]: Taking taylor expansion of (/ (- (pow x 2) (* 4.0 (pow y 2))) (+ (pow x 2) (* 4.0 (pow y 2)))) in (x y) around 0
0.157 * [taylor]: Taking taylor expansion of (/ (- (pow x 2) (* 4.0 (pow y 2))) (+ (pow x 2) (* 4.0 (pow y 2)))) in y
0.157 * [taylor]: Taking taylor expansion of (- (pow x 2) (* 4.0 (pow y 2))) in y
0.157 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.157 * [taylor]: Taking taylor expansion of x in y
0.157 * [taylor]: Taking taylor expansion of (* 4.0 (pow y 2)) in y
0.157 * [taylor]: Taking taylor expansion of 4.0 in y
0.157 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.157 * [taylor]: Taking taylor expansion of y in y
0.157 * [taylor]: Taking taylor expansion of (+ (pow x 2) (* 4.0 (pow y 2))) in y
0.157 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.157 * [taylor]: Taking taylor expansion of x in y
0.157 * [taylor]: Taking taylor expansion of (* 4.0 (pow y 2)) in y
0.157 * [taylor]: Taking taylor expansion of 4.0 in y
0.157 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.157 * [taylor]: Taking taylor expansion of y in y
0.157 * [taylor]: Taking taylor expansion of (/ (- (pow x 2) (* 4.0 (pow y 2))) (+ (pow x 2) (* 4.0 (pow y 2)))) in x
0.157 * [taylor]: Taking taylor expansion of (- (pow x 2) (* 4.0 (pow y 2))) in x
0.157 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.157 * [taylor]: Taking taylor expansion of x in x
0.157 * [taylor]: Taking taylor expansion of (* 4.0 (pow y 2)) in x
0.157 * [taylor]: Taking taylor expansion of 4.0 in x
0.157 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.157 * [taylor]: Taking taylor expansion of y in x
0.157 * [taylor]: Taking taylor expansion of (+ (pow x 2) (* 4.0 (pow y 2))) in x
0.157 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.157 * [taylor]: Taking taylor expansion of x in x
0.157 * [taylor]: Taking taylor expansion of (* 4.0 (pow y 2)) in x
0.157 * [taylor]: Taking taylor expansion of 4.0 in x
0.157 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.157 * [taylor]: Taking taylor expansion of y in x
0.158 * [taylor]: Taking taylor expansion of (/ (- (pow x 2) (* 4.0 (pow y 2))) (+ (pow x 2) (* 4.0 (pow y 2)))) in x
0.158 * [taylor]: Taking taylor expansion of (- (pow x 2) (* 4.0 (pow y 2))) in x
0.158 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.158 * [taylor]: Taking taylor expansion of x in x
0.158 * [taylor]: Taking taylor expansion of (* 4.0 (pow y 2)) in x
0.158 * [taylor]: Taking taylor expansion of 4.0 in x
0.158 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.158 * [taylor]: Taking taylor expansion of y in x
0.158 * [taylor]: Taking taylor expansion of (+ (pow x 2) (* 4.0 (pow y 2))) in x
0.158 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.158 * [taylor]: Taking taylor expansion of x in x
0.158 * [taylor]: Taking taylor expansion of (* 4.0 (pow y 2)) in x
0.158 * [taylor]: Taking taylor expansion of 4.0 in x
0.158 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.158 * [taylor]: Taking taylor expansion of y in x
0.159 * [taylor]: Taking taylor expansion of -1.0 in y
0.161 * [taylor]: Taking taylor expansion of 0 in y
0.164 * [taylor]: Taking taylor expansion of (* 0.5 (/ 1 (pow y 2))) in y
0.164 * [taylor]: Taking taylor expansion of 0.5 in y
0.164 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.164 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.164 * [taylor]: Taking taylor expansion of y in y
0.172 * [taylor]: Taking taylor expansion of 0 in y
0.172 * [approximate]: Taking taylor expansion of (/ (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) (+ (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2))))) in (x y) around 0
0.172 * [taylor]: Taking taylor expansion of (/ (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) (+ (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2))))) in y
0.172 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in y
0.172 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in y
0.172 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.172 * [taylor]: Taking taylor expansion of x in y
0.172 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in y
0.172 * [taylor]: Taking taylor expansion of 4.0 in y
0.172 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.172 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.172 * [taylor]: Taking taylor expansion of y in y
0.173 * [taylor]: Taking taylor expansion of (+ (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in y
0.173 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in y
0.173 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.173 * [taylor]: Taking taylor expansion of x in y
0.173 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in y
0.173 * [taylor]: Taking taylor expansion of 4.0 in y
0.173 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.173 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.173 * [taylor]: Taking taylor expansion of y in y
0.176 * [taylor]: Taking taylor expansion of (/ (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) (+ (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2))))) in x
0.176 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in x
0.176 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.176 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.176 * [taylor]: Taking taylor expansion of x in x
0.176 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in x
0.176 * [taylor]: Taking taylor expansion of 4.0 in x
0.176 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.176 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.176 * [taylor]: Taking taylor expansion of y in x
0.176 * [taylor]: Taking taylor expansion of (+ (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in x
0.177 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.177 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.177 * [taylor]: Taking taylor expansion of x in x
0.177 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in x
0.177 * [taylor]: Taking taylor expansion of 4.0 in x
0.177 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.177 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.177 * [taylor]: Taking taylor expansion of y in x
0.178 * [taylor]: Taking taylor expansion of (/ (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) (+ (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2))))) in x
0.178 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in x
0.178 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.178 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.178 * [taylor]: Taking taylor expansion of x in x
0.179 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in x
0.179 * [taylor]: Taking taylor expansion of 4.0 in x
0.179 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.179 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.179 * [taylor]: Taking taylor expansion of y in x
0.179 * [taylor]: Taking taylor expansion of (+ (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in x
0.179 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.179 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.179 * [taylor]: Taking taylor expansion of x in x
0.179 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in x
0.179 * [taylor]: Taking taylor expansion of 4.0 in x
0.179 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.179 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.179 * [taylor]: Taking taylor expansion of y in x
0.180 * [taylor]: Taking taylor expansion of 1 in y
0.183 * [taylor]: Taking taylor expansion of 0 in y
0.186 * [taylor]: Taking taylor expansion of (- (* 8.0 (/ 1 (pow y 2)))) in y
0.186 * [taylor]: Taking taylor expansion of (* 8.0 (/ 1 (pow y 2))) in y
0.186 * [taylor]: Taking taylor expansion of 8.0 in y
0.186 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.186 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.186 * [taylor]: Taking taylor expansion of y in y
0.194 * [taylor]: Taking taylor expansion of 0 in y
0.195 * [approximate]: Taking taylor expansion of (/ (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) (+ (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2))))) in (x y) around 0
0.195 * [taylor]: Taking taylor expansion of (/ (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) (+ (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2))))) in y
0.195 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in y
0.195 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in y
0.195 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.195 * [taylor]: Taking taylor expansion of x in y
0.195 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in y
0.195 * [taylor]: Taking taylor expansion of 4.0 in y
0.195 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.195 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.195 * [taylor]: Taking taylor expansion of y in y
0.195 * [taylor]: Taking taylor expansion of (+ (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in y
0.196 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in y
0.196 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.196 * [taylor]: Taking taylor expansion of x in y
0.196 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in y
0.196 * [taylor]: Taking taylor expansion of 4.0 in y
0.196 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.196 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.196 * [taylor]: Taking taylor expansion of y in y
0.198 * [taylor]: Taking taylor expansion of (/ (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) (+ (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2))))) in x
0.198 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in x
0.198 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.198 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.198 * [taylor]: Taking taylor expansion of x in x
0.199 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in x
0.199 * [taylor]: Taking taylor expansion of 4.0 in x
0.199 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.199 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.199 * [taylor]: Taking taylor expansion of y in x
0.199 * [taylor]: Taking taylor expansion of (+ (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in x
0.199 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.199 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.199 * [taylor]: Taking taylor expansion of x in x
0.200 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in x
0.200 * [taylor]: Taking taylor expansion of 4.0 in x
0.200 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.200 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.200 * [taylor]: Taking taylor expansion of y in x
0.201 * [taylor]: Taking taylor expansion of (/ (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) (+ (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2))))) in x
0.201 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in x
0.201 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.201 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.201 * [taylor]: Taking taylor expansion of x in x
0.201 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in x
0.201 * [taylor]: Taking taylor expansion of 4.0 in x
0.201 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.201 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.201 * [taylor]: Taking taylor expansion of y in x
0.201 * [taylor]: Taking taylor expansion of (+ (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in x
0.201 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.202 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.202 * [taylor]: Taking taylor expansion of x in x
0.202 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in x
0.202 * [taylor]: Taking taylor expansion of 4.0 in x
0.202 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.202 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.202 * [taylor]: Taking taylor expansion of y in x
0.203 * [taylor]: Taking taylor expansion of 1 in y
0.205 * [taylor]: Taking taylor expansion of 0 in y
0.211 * [taylor]: Taking taylor expansion of (- (* 8.0 (/ 1 (pow y 2)))) in y
0.211 * [taylor]: Taking taylor expansion of (* 8.0 (/ 1 (pow y 2))) in y
0.211 * [taylor]: Taking taylor expansion of 8.0 in y
0.211 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.211 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.211 * [taylor]: Taking taylor expansion of y in y
0.220 * [taylor]: Taking taylor expansion of 0 in y
0.220 * * * * [progress]: [ 2 / 2 ] generating series at (2 1)
0.220 * [approximate]: Taking taylor expansion of (- (pow x 2) (* 4.0 (pow y 2))) in (x y) around 0
0.220 * [taylor]: Taking taylor expansion of (- (pow x 2) (* 4.0 (pow y 2))) in y
0.220 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.220 * [taylor]: Taking taylor expansion of x in y
0.220 * [taylor]: Taking taylor expansion of (* 4.0 (pow y 2)) in y
0.220 * [taylor]: Taking taylor expansion of 4.0 in y
0.220 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.220 * [taylor]: Taking taylor expansion of y in y
0.220 * [taylor]: Taking taylor expansion of (- (pow x 2) (* 4.0 (pow y 2))) in x
0.220 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.220 * [taylor]: Taking taylor expansion of x in x
0.220 * [taylor]: Taking taylor expansion of (* 4.0 (pow y 2)) in x
0.220 * [taylor]: Taking taylor expansion of 4.0 in x
0.220 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.220 * [taylor]: Taking taylor expansion of y in x
0.220 * [taylor]: Taking taylor expansion of (- (pow x 2) (* 4.0 (pow y 2))) in x
0.221 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.221 * [taylor]: Taking taylor expansion of x in x
0.221 * [taylor]: Taking taylor expansion of (* 4.0 (pow y 2)) in x
0.221 * [taylor]: Taking taylor expansion of 4.0 in x
0.221 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.221 * [taylor]: Taking taylor expansion of y in x
0.221 * [taylor]: Taking taylor expansion of (- (* 4.0 (pow y 2))) in y
0.221 * [taylor]: Taking taylor expansion of (* 4.0 (pow y 2)) in y
0.221 * [taylor]: Taking taylor expansion of 4.0 in y
0.221 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.221 * [taylor]: Taking taylor expansion of y in y
0.222 * [taylor]: Taking taylor expansion of 0 in y
0.223 * [taylor]: Taking taylor expansion of 1 in y
0.226 * [taylor]: Taking taylor expansion of 0 in y
0.230 * [taylor]: Taking taylor expansion of 0 in y
0.231 * [approximate]: Taking taylor expansion of (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in (x y) around 0
0.231 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in y
0.231 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in y
0.231 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.231 * [taylor]: Taking taylor expansion of x in y
0.231 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in y
0.231 * [taylor]: Taking taylor expansion of 4.0 in y
0.231 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.231 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.231 * [taylor]: Taking taylor expansion of y in y
0.232 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in x
0.232 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.232 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.232 * [taylor]: Taking taylor expansion of x in x
0.232 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in x
0.232 * [taylor]: Taking taylor expansion of 4.0 in x
0.232 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.232 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.232 * [taylor]: Taking taylor expansion of y in x
0.232 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in x
0.232 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.232 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.232 * [taylor]: Taking taylor expansion of x in x
0.233 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in x
0.233 * [taylor]: Taking taylor expansion of 4.0 in x
0.233 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.233 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.233 * [taylor]: Taking taylor expansion of y in x
0.233 * [taylor]: Taking taylor expansion of 1 in y
0.234 * [taylor]: Taking taylor expansion of 0 in y
0.236 * [taylor]: Taking taylor expansion of (- (* 4.0 (/ 1 (pow y 2)))) in y
0.236 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in y
0.236 * [taylor]: Taking taylor expansion of 4.0 in y
0.236 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.236 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.236 * [taylor]: Taking taylor expansion of y in y
0.239 * [taylor]: Taking taylor expansion of 0 in y
0.243 * [taylor]: Taking taylor expansion of 0 in y
0.246 * [approximate]: Taking taylor expansion of (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in (x y) around 0
0.246 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in y
0.246 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in y
0.246 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.246 * [taylor]: Taking taylor expansion of x in y
0.246 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in y
0.246 * [taylor]: Taking taylor expansion of 4.0 in y
0.246 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.246 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.246 * [taylor]: Taking taylor expansion of y in y
0.246 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in x
0.246 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.246 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.246 * [taylor]: Taking taylor expansion of x in x
0.247 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in x
0.247 * [taylor]: Taking taylor expansion of 4.0 in x
0.247 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.247 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.247 * [taylor]: Taking taylor expansion of y in x
0.247 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in x
0.247 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.247 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.247 * [taylor]: Taking taylor expansion of x in x
0.248 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in x
0.248 * [taylor]: Taking taylor expansion of 4.0 in x
0.248 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.248 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.248 * [taylor]: Taking taylor expansion of y in x
0.248 * [taylor]: Taking taylor expansion of 1 in y
0.249 * [taylor]: Taking taylor expansion of 0 in y
0.250 * [taylor]: Taking taylor expansion of (- (* 4.0 (/ 1 (pow y 2)))) in y
0.250 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in y
0.250 * [taylor]: Taking taylor expansion of 4.0 in y
0.250 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.251 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.251 * [taylor]: Taking taylor expansion of y in y
0.254 * [taylor]: Taking taylor expansion of 0 in y
0.258 * [taylor]: Taking taylor expansion of 0 in y
0.260 * * * [progress]: simplifying candidates
0.261 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (- (log (- (* x x) (* (* y 4.0) y))) (log (+ (* x x) (* (* y 4.0) y))))
  (log (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))))
  (exp (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))))
  (/ (* (* (- (* x x) (* (* y 4.0) y)) (- (* x x) (* (* y 4.0) y))) (- (* x x) (* (* y 4.0) y))) (* (* (+ (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))) (+ (* x x) (* (* y 4.0) y))))
  (* (cbrt (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y)))) (cbrt (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y)))))
  (cbrt (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))))
  (* (* (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))) (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y)))) (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))))
  (sqrt (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))))
  (sqrt (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))))
  (- (- (* x x) (* (* y 4.0) y)))
  (- (+ (* x x) (* (* y 4.0) y)))
  (/ (* x x) (+ (* x x) (* (* y 4.0) y)))
  (/ (* (* y 4.0) y) (+ (* x x) (* (* y 4.0) y)))
  (/ (* (cbrt (- (* x x) (* (* y 4.0) y))) (cbrt (- (* x x) (* (* y 4.0) y)))) (* (cbrt (+ (* x x) (* (* y 4.0) y))) (cbrt (+ (* x x) (* (* y 4.0) y)))))
  (/ (cbrt (- (* x x) (* (* y 4.0) y))) (cbrt (+ (* x x) (* (* y 4.0) y))))
  (/ (* (cbrt (- (* x x) (* (* y 4.0) y))) (cbrt (- (* x x) (* (* y 4.0) y)))) (sqrt (+ (* x x) (* (* y 4.0) y))))
  (/ (cbrt (- (* x x) (* (* y 4.0) y))) (sqrt (+ (* x x) (* (* y 4.0) y))))
  (/ (* (cbrt (- (* x x) (* (* y 4.0) y))) (cbrt (- (* x x) (* (* y 4.0) y)))) 1)
  (/ (cbrt (- (* x x) (* (* y 4.0) y))) (+ (* x x) (* (* y 4.0) y)))
  (/ (sqrt (- (* x x) (* (* y 4.0) y))) (* (cbrt (+ (* x x) (* (* y 4.0) y))) (cbrt (+ (* x x) (* (* y 4.0) y)))))
  (/ (sqrt (- (* x x) (* (* y 4.0) y))) (cbrt (+ (* x x) (* (* y 4.0) y))))
  (/ (sqrt (- (* x x) (* (* y 4.0) y))) (sqrt (+ (* x x) (* (* y 4.0) y))))
  (/ (sqrt (- (* x x) (* (* y 4.0) y))) (sqrt (+ (* x x) (* (* y 4.0) y))))
  (/ (sqrt (- (* x x) (* (* y 4.0) y))) 1)
  (/ (sqrt (- (* x x) (* (* y 4.0) y))) (+ (* x x) (* (* y 4.0) y)))
  (/ 1 (* (cbrt (+ (* x x) (* (* y 4.0) y))) (cbrt (+ (* x x) (* (* y 4.0) y)))))
  (/ (- (* x x) (* (* y 4.0) y)) (cbrt (+ (* x x) (* (* y 4.0) y))))
  (/ 1 (sqrt (+ (* x x) (* (* y 4.0) y))))
  (/ (- (* x x) (* (* y 4.0) y)) (sqrt (+ (* x x) (* (* y 4.0) y))))
  (/ 1 1)
  (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y)))
  (/ 1 (+ (* x x) (* (* y 4.0) y)))
  (/ (+ (* x x) (* (* y 4.0) y)) (- (* x x) (* (* y 4.0) y)))
  (/ (- (* x x) (* (* y 4.0) y)) (* (cbrt (+ (* x x) (* (* y 4.0) y))) (cbrt (+ (* x x) (* (* y 4.0) y)))))
  (/ (- (* x x) (* (* y 4.0) y)) (sqrt (+ (* x x) (* (* y 4.0) y))))
  (/ (- (* x x) (* (* y 4.0) y)) 1)
  (/ (+ (* x x) (* (* y 4.0) y)) (cbrt (- (* x x) (* (* y 4.0) y))))
  (/ (+ (* x x) (* (* y 4.0) y)) (sqrt (- (* x x) (* (* y 4.0) y))))
  (/ (+ (* x x) (* (* y 4.0) y)) (- (* x x) (* (* y 4.0) y)))
  (/ (- (* x x) (* (* y 4.0) y)) (+ (pow (* x x) 3) (pow (* (* y 4.0) y) 3)))
  (/ (- (* x x) (* (* y 4.0) y)) (- (* (* x x) (* x x)) (* (* (* y 4.0) y) (* (* y 4.0) y))))
  (* (+ (* x x) (* (* y 4.0) y)) (+ (* (* x x) (* x x)) (+ (* (* (* y 4.0) y) (* (* y 4.0) y)) (* (* x x) (* (* y 4.0) y)))))
  (* (+ (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y)))
  (/ (exp (* x x)) (exp (* (* y 4.0) y)))
  (log (- (* x x) (* (* y 4.0) y)))
  (exp (- (* x x) (* (* y 4.0) y)))
  (* (cbrt (- (* x x) (* (* y 4.0) y))) (cbrt (- (* x x) (* (* y 4.0) y))))
  (cbrt (- (* x x) (* (* y 4.0) y)))
  (* (* (- (* x x) (* (* y 4.0) y)) (- (* x x) (* (* y 4.0) y))) (- (* x x) (* (* y 4.0) y)))
  (sqrt (- (* x x) (* (* y 4.0) y)))
  (sqrt (- (* x x) (* (* y 4.0) y)))
  (- (pow (* x x) 3) (pow (* (* y 4.0) y) 3))
  (+ (* (* x x) (* x x)) (+ (* (* (* y 4.0) y) (* (* y 4.0) y)) (* (* x x) (* (* y 4.0) y))))
  (- (* (* y 4.0) y))
  (- (* (* x x) (* x x)) (* (* (* y 4.0) y) (* (* y 4.0) y)))
  (+ (* x x) (* (* y 4.0) y))
  (- (* (* y 4.0) y))
  -1.0
  1
  1
  (- (pow x 2) (* 4.0 (pow y 2)))
  (- (pow x 2) (* 4.0 (pow y 2)))
  (- (pow x 2) (* 4.0 (pow y 2)))
0.264 * * [simplify]: iteration  0 :  82  enodes  (cost  1196 )
0.277 * * [simplify]: iteration  1 :  219  enodes  (cost  1174 )
0.327 * * [simplify]: iteration  2 :  940  enodes  (cost  1060 )
0.699 * * [simplify]: iteration  3 :  4772  enodes  (cost  1056 )
3.182 * * [simplify]: iteration  done :  5000  enodes  (cost  1056 )
3.182 * [simplify]: Simplified to:
   (log (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))))
  (log (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))))
  (exp (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))))
  (pow (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))) 3)
  (* (cbrt (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y)))) (cbrt (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y)))))
  (cbrt (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))))
  (pow (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))) 3)
  (sqrt (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))))
  (sqrt (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))))
  (- (- (* x x) (* (* y 4.0) y)))
  (- (+ (* x x) (* (* y 4.0) y)))
  (/ (* x x) (+ (* x x) (* (* y 4.0) y)))
  (/ (* (* y 4.0) y) (+ (* x x) (* (* y 4.0) y)))
  (/ (* (cbrt (- (* x x) (* (* y 4.0) y))) (cbrt (- (* x x) (* (* y 4.0) y)))) (* (cbrt (+ (* x x) (* (* y 4.0) y))) (cbrt (+ (* x x) (* (* y 4.0) y)))))
  (/ (cbrt (- (* x x) (* (* y 4.0) y))) (cbrt (+ (* x x) (* (* y 4.0) y))))
  (/ (* (cbrt (- (* x x) (* (* y 4.0) y))) (cbrt (- (* x x) (* (* y 4.0) y)))) (sqrt (+ (* x x) (* (* y 4.0) y))))
  (/ (cbrt (- (* x x) (* (* y 4.0) y))) (sqrt (+ (* x x) (* (* y 4.0) y))))
  (* (cbrt (- (* x x) (* (* y 4.0) y))) (cbrt (- (* x x) (* (* y 4.0) y))))
  (/ (cbrt (- (* x x) (* (* y 4.0) y))) (+ (* x x) (* (* y 4.0) y)))
  (/ (sqrt (- (* x x) (* (* y 4.0) y))) (* (cbrt (+ (* x x) (* (* y 4.0) y))) (cbrt (+ (* x x) (* (* y 4.0) y)))))
  (/ (sqrt (- (* x x) (* (* y 4.0) y))) (cbrt (+ (* x x) (* (* y 4.0) y))))
  (/ (sqrt (- (* x x) (* (* y 4.0) y))) (sqrt (+ (* x x) (* (* y 4.0) y))))
  (/ (sqrt (- (* x x) (* (* y 4.0) y))) (sqrt (+ (* x x) (* (* y 4.0) y))))
  (sqrt (- (* x x) (* (* y 4.0) y)))
  (/ (sqrt (- (* x x) (* (* y 4.0) y))) (+ (* x x) (* (* y 4.0) y)))
  (/ 1 (* (cbrt (+ (* x x) (* (* y 4.0) y))) (cbrt (+ (* x x) (* (* y 4.0) y)))))
  (/ (- (* x x) (* (* y 4.0) y)) (cbrt (+ (* x x) (* (* y 4.0) y))))
  (/ 1 (sqrt (+ (* x x) (* (* y 4.0) y))))
  (/ (- (* x x) (* (* y 4.0) y)) (sqrt (+ (* x x) (* (* y 4.0) y))))
  1
  (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y)))
  (/ 1 (+ (* x x) (* (* y 4.0) y)))
  (/ (+ (* x x) (* (* y 4.0) y)) (- (* x x) (* (* y 4.0) y)))
  (/ (- (* x x) (* (* y 4.0) y)) (* (cbrt (+ (* x x) (* (* y 4.0) y))) (cbrt (+ (* x x) (* (* y 4.0) y)))))
  (/ (- (* x x) (* (* y 4.0) y)) (sqrt (+ (* x x) (* (* y 4.0) y))))
  (- (pow x 2) (* 4.0 (pow y 2)))
  (/ (+ (* x x) (* (* y 4.0) y)) (cbrt (- (* x x) (* (* y 4.0) y))))
  (/ (+ (* x x) (* (* y 4.0) y)) (sqrt (- (* x x) (* (* y 4.0) y))))
  (/ (+ (* x x) (* (* y 4.0) y)) (- (* x x) (* (* y 4.0) y)))
  (/ (- (pow x 2) (* 4.0 (pow y 2))) (+ (pow x 6) (pow (* (* y 4.0) y) 3)))
  (/ (- (pow x 2) (* 4.0 (pow y 2))) (- (pow x 4) (* (* 4.0 (* y 4.0)) (pow y 3))))
  (* (+ (* (+ (* x x) (* (* y 4.0) y)) (* (* y 4.0) y)) (pow x 4)) (+ (* x x) (* (* y 4.0) y)))
  (* (+ (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y)))
  (exp (- (* x x) (* (* y 4.0) y)))
  (log (- (* x x) (* (* y 4.0) y)))
  (exp (- (* x x) (* (* y 4.0) y)))
  (* (cbrt (- (* x x) (* (* y 4.0) y))) (cbrt (- (* x x) (* (* y 4.0) y))))
  (cbrt (- (pow x 2) (* 4.0 (pow y 2))))
  (pow (- (pow x 2) (* (* y 4.0) y)) 3)
  (sqrt (- (* x x) (* (* y 4.0) y)))
  (sqrt (- (* x x) (* (* y 4.0) y)))
  (- (pow x 6) (pow (* (* y 4.0) y) 3))
  (+ (* (+ (* x x) (* (* y 4.0) y)) (* (* y 4.0) y)) (pow x 4))
  (- (* 4.0 (pow y 2)))
  (- (pow x 4) (* (* 4.0 (* y 4.0)) (pow y 3)))
  (+ (* 4.0 (pow y 2)) (* x x))
  (- (* 4.0 (pow y 2)))
  -1.0
  1
  1
  (- (pow x 2) (* 4.0 (pow y 2)))
  (- (pow x 2) (* 4.0 (pow y 2)))
  (- (pow x 2) (* 4.0 (pow y 2)))
3.183 * * * [progress]: adding candidates to table
3.302 * * [progress]: iteration 2 / 4
3.302 * * * [progress]: picking best candidate
3.304 * * * * [pick]: Picked  #<alt (λ (x y) 1)>
3.304 * * * [progress]: localizing error
3.304 * * * [progress]: generating rewritten candidates
3.304 * * * [progress]: generating series expansions
3.304 * * * [progress]: simplifying candidates
3.304 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   
3.305 * * [simplify]: iteration  0 :  0  enodes  (cost  0 )
3.305 * * [simplify]: iteration  done :  0  enodes  (cost  0 )
3.305 * [simplify]: Simplified to:
   
3.305 * * * [progress]: adding candidates to table
3.305 * * [progress]: iteration 3 / 4
3.305 * * * [progress]: picking best candidate
3.306 * * * * [pick]: Picked  #<alt (λ (x y) -1.0)>
3.306 * * * [progress]: localizing error
3.307 * * * [progress]: generating rewritten candidates
3.307 * * * [progress]: generating series expansions
3.307 * * * [progress]: simplifying candidates
3.307 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   
3.308 * * [simplify]: iteration  0 :  0  enodes  (cost  0 )
3.308 * * [simplify]: iteration  done :  0  enodes  (cost  0 )
3.308 * [simplify]: Simplified to:
   
3.308 * * * [progress]: adding candidates to table
3.308 * [progress]: [Phase 3 of 3] Extracting.
3.308 * * [regime]: Finding splitpoints for: (#<alt (λ (x y) -1.0)> #<alt (λ (x y) 1)> #<alt (λ (x y) (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))))>)
3.308 * * * [regime-changes]: Trying 5 branch expressions: ((* (* y 4.0) y) (* x x) (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))) y x)
3.308 * * * * [regimes]: Trying to branch on (* (* y 4.0) y) from (#<alt (λ (x y) -1.0)> #<alt (λ (x y) 1)> #<alt (λ (x y) (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))))>)
3.328 * * * * [regimes]: Trying to branch on (* x x) from (#<alt (λ (x y) -1.0)> #<alt (λ (x y) 1)> #<alt (λ (x y) (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))))>)
3.351 * * * * [regimes]: Trying to branch on (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))) from (#<alt (λ (x y) -1.0)> #<alt (λ (x y) 1)> #<alt (λ (x y) (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))))>)
3.366 * * * * [regimes]: Trying to branch on y from (#<alt (λ (x y) -1.0)> #<alt (λ (x y) 1)> #<alt (λ (x y) (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))))>)
3.396 * * * * [regimes]: Trying to branch on x from (#<alt (λ (x y) -1.0)> #<alt (λ (x y) 1)> #<alt (λ (x y) (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))))>)
3.426 * * * [regime]: Found split indices: #<option (#s(si 0 79) #s(si 2 84) #s(si 0 102) #s(si 2 182) #s(si 1 255))>
3.427 * [binary-search]: Improving bounds with binary search for (* x x) and (#<alt (λ (x y) -1.0)> #<alt (λ (x y) 1)> #<alt (λ (x y) (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))))>)
3.548 * [regimes]: Found splitpoints: (#s(sp 0 (* x x) 8.486775487776079e-264) #s(sp 2 (* x x) 2.1340718332425224e-245) #s(sp 0 (* x x) 2.7325230911480087e-173) #s(sp 2 (* x x) 4.686018001101959e+264) #s(sp 1 (* x x) +nan.0)) , with alts (#<alt (λ (x y) -1.0)> #<alt (λ (x y) 1)> #<alt (λ (x y) (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))))>)
3.548 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (if (<= (* x x) 8.486775487776079e-264) -1.0 (if (<= (* x x) 2.1340718332425224e-245) (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))) (if (<= (* x x) 2.7325230911480087e-173) -1.0 (if (<= (* x x) 4.686018001101959e+264) (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))) 1))))
3.549 * * [simplify]: iteration  0 :  23  enodes  (cost  65 )
3.550 * * [simplify]: iteration  1 :  28  enodes  (cost  65 )
3.550 * * [simplify]: iteration  done :  28  enodes  (cost  65 )
3.550 * [simplify]: Simplified to:
   (if (<= (* x x) 8.486775487776079e-264) -1.0 (if (<= (* x x) 2.1340718332425224e-245) (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))) (if (<= (* x x) 2.7325230911480087e-173) -1.0 (if (<= (* x x) 4.686018001101959e+264) (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))) 1))))
3.988 * [regime-testing]: Baseline error score: 31.065151669319018
3.988 * [regime-testing]: Oracle error score: 0.31364736920834574
3.990 * [regime-testing]: End program error score: 12.163187969123218
4.029 * [regime-testing]: Target error score: 30.78207288582935