11.668 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.010 * * * [progress]: [2/2] Setting up program.
0.012 * [progress]: [Phase 2 of 3] Improving.
0.012 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (+ x (/ (- y x) 2.0))
0.013 * * [simplify]: iteration  0 :  6  enodes  (cost  7 )
0.014 * * [simplify]: iteration  1 :  12  enodes  (cost  7 )
0.015 * * [simplify]: iteration  2 :  19  enodes  (cost  7 )
0.017 * * [simplify]: iteration  3 :  28  enodes  (cost  7 )
0.020 * * [simplify]: iteration  4 :  38  enodes  (cost  7 )
0.024 * * [simplify]: iteration  5 :  49  enodes  (cost  7 )
0.029 * * [simplify]: iteration  6 :  64  enodes  (cost  7 )
0.036 * * [simplify]: iteration  7 :  73  enodes  (cost  7 )
0.044 * * [simplify]: iteration  8 :  89  enodes  (cost  7 )
0.057 * * [simplify]: iteration  9 :  110  enodes  (cost  7 )
0.070 * * [simplify]: iteration  10 :  136  enodes  (cost  7 )
0.088 * * [simplify]: iteration  11 :  144  enodes  (cost  7 )
0.108 * * [simplify]: iteration  done :  144  enodes  (cost  7 )
0.108 * [simplify]: Simplified to:
   (+ x (/ (- y x) 2.0))
0.108 * * [progress]: iteration 1 / 4
0.108 * * * [progress]: picking best candidate
0.110 * * * * [pick]: Picked  #<alt (λ (x y) (+ x (/ (- y x) 2.0)))>
0.110 * * * [progress]: localizing error
0.114 * * * [progress]: generating rewritten candidates
0.114 * * * [progress]: generating series expansions
0.115 * * * [progress]: simplifying candidates
0.115 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   
0.116 * * [simplify]: iteration  0 :  0  enodes  (cost  0 )
0.116 * * [simplify]: iteration  done :  0  enodes  (cost  0 )
0.116 * [simplify]: Simplified to:
   
0.116 * * * [progress]: adding candidates to table
0.116 * [progress]: [Phase 3 of 3] Extracting.
0.117 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (+ x (/ (- y x) 2.0))
0.117 * * [simplify]: iteration  0 :  6  enodes  (cost  7 )
0.118 * * [simplify]: iteration  1 :  7  enodes  (cost  7 )
0.118 * * [simplify]: iteration  done :  7  enodes  (cost  7 )
0.118 * [simplify]: Simplified to:
   (+ x (/ (- y x) 2.0))
0.438 * [regime-testing]: End program error score: 0.016617678772797323
0.456 * [regime-testing]: Target error score: 0