6.813 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.027 * * * [progress]: [2/2] Setting up program.
0.029 * [progress]: [Phase 2 of 3] Improving.
0.029 * [simplify]: Simplifying:
  (sqrt (+ x y))
0.029 * * [simplify]: Extracting # 0 : cost  0
0.029 * * [simplify]: Extracting # 1 : cost  0
0.029 * * [simplify]: Extracting # 2 : cost  0
0.029 * * [simplify]: Extracting # 3 : cost  0
0.029 * * [simplify]: Extracting # 4 : cost  0
0.029 * * [simplify]: iteration  0 :  4  enodes  (cost  4 )
0.030 * * [simplify]: Extracting # 0 : cost  0
0.030 * * [simplify]: iteration  1 :  5  enodes  (cost  4 )
0.030 * * [simplify]: Extracting # 0 : cost  0
0.030 * * [simplify]: iteration done:  5  enodes  (cost  4 )
0.030 * [simplify]: Simplified to:
  (sqrt (+ x y))
0.030 * * [progress]: iteration 1 / 4
0.030 * * * [progress]: picking best candidate
0.032 * * * * [pick]: Picked  #<alt (λ (x y) (sqrt (+ x y)))>
0.032 * * * [progress]: localizing error
0.036 * * * [progress]: generating rewritten candidates
0.036 * * * * [progress]: [ 1 / 1 ] rewriting at (2)
0.044 * * * [progress]: generating series expansions
0.044 * * * * [progress]: [ 1 / 1 ] generating series at (2)
0.044 * [backup-simplify]: Simplify (sqrt (+ x y)) into (sqrt (+ x y))
0.044 * [approximate]: Taking taylor expansion of (sqrt (+ x y)) in (x y) around 0
0.044 * [taylor]: Taking taylor expansion of (sqrt (+ x y)) in y
0.044 * [taylor]: Taking taylor expansion of (+ x y) in y
0.044 * [taylor]: Taking taylor expansion of x in y
0.044 * [backup-simplify]: Simplify x into x
0.044 * [taylor]: Taking taylor expansion of y in y
0.044 * [backup-simplify]: Simplify 0 into 0
0.044 * [backup-simplify]: Simplify 1 into 1
0.045 * [backup-simplify]: Simplify (+ x 0) into x
0.045 * [backup-simplify]: Simplify (sqrt x) into (sqrt x)
0.045 * [backup-simplify]: Simplify (+ 0 1) into 1
0.045 * [backup-simplify]: Simplify (/ 1 (* 2 (sqrt x))) into (* 1/2 (sqrt (/ 1 x)))
0.045 * [taylor]: Taking taylor expansion of (sqrt (+ x y)) in x
0.045 * [taylor]: Taking taylor expansion of (+ x y) in x
0.045 * [taylor]: Taking taylor expansion of x in x
0.045 * [backup-simplify]: Simplify 0 into 0
0.045 * [backup-simplify]: Simplify 1 into 1
0.045 * [taylor]: Taking taylor expansion of y in x
0.045 * [backup-simplify]: Simplify y into y
0.045 * [backup-simplify]: Simplify (+ 0 y) into y
0.045 * [backup-simplify]: Simplify (sqrt y) into (sqrt y)
0.046 * [backup-simplify]: Simplify (+ 1 0) into 1
0.046 * [backup-simplify]: Simplify (/ 1 (* 2 (sqrt y))) into (* 1/2 (sqrt (/ 1 y)))
0.046 * [taylor]: Taking taylor expansion of (sqrt (+ x y)) in x
0.046 * [taylor]: Taking taylor expansion of (+ x y) in x
0.046 * [taylor]: Taking taylor expansion of x in x
0.046 * [backup-simplify]: Simplify 0 into 0
0.046 * [backup-simplify]: Simplify 1 into 1
0.046 * [taylor]: Taking taylor expansion of y in x
0.046 * [backup-simplify]: Simplify y into y
0.046 * [backup-simplify]: Simplify (+ 0 y) into y
0.046 * [backup-simplify]: Simplify (sqrt y) into (sqrt y)
0.046 * [backup-simplify]: Simplify (+ 1 0) into 1
0.046 * [backup-simplify]: Simplify (/ 1 (* 2 (sqrt y))) into (* 1/2 (sqrt (/ 1 y)))
0.046 * [taylor]: Taking taylor expansion of (sqrt y) in y
0.046 * [taylor]: Taking taylor expansion of y in y
0.046 * [backup-simplify]: Simplify 0 into 0
0.046 * [backup-simplify]: Simplify 1 into 1
0.047 * [backup-simplify]: Simplify (sqrt 0) into 0
0.047 * [backup-simplify]: Simplify (/ 1 (* 2 (sqrt 0))) into +nan.0
0.047 * [backup-simplify]: Simplify 0 into 0
0.047 * [taylor]: Taking taylor expansion of (* 1/2 (sqrt (/ 1 y))) in y
0.048 * [taylor]: Taking taylor expansion of 1/2 in y
0.048 * [backup-simplify]: Simplify 1/2 into 1/2
0.048 * [taylor]: Taking taylor expansion of (sqrt (/ 1 y)) in y
0.048 * [taylor]: Taking taylor expansion of (/ 1 y) in y
0.048 * [taylor]: Taking taylor expansion of y in y
0.048 * [backup-simplify]: Simplify 0 into 0
0.048 * [backup-simplify]: Simplify 1 into 1
0.048 * [backup-simplify]: Simplify (/ 1 1) into 1
0.048 * [backup-simplify]: Simplify (sqrt 0) into 0
0.049 * [backup-simplify]: Simplify (/ 1 (* 2 (sqrt 0))) into +nan.0
0.050 * [backup-simplify]: Simplify (+ (* 1/2 +nan.0) (* 0 0)) into (- +nan.0)
0.050 * [backup-simplify]: Simplify (- +nan.0) into (- +nan.0)
0.050 * [backup-simplify]: Simplify +nan.0 into +nan.0
0.050 * [backup-simplify]: Simplify (+ 0 0) into 0