9.797 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.088 * * * [progress]: [2/2] Setting up program.
0.091 * [progress]: [Phase 2 of 3] Improving.
0.091 * [simplify]: Simplifying using  #<procedure:simplify-batch-egg> :
   (- (sqrt (- x y)) (sqrt (+ x y)))
0.093 * * [simplify]: iteration  0 :  12  enodes  (cost  5 )
0.094 * * [simplify]: iteration  1 :  14  enodes  (cost  5 )
0.096 * * [simplify]: iteration  2 :  14  enodes  (cost  5 )
0.096 * [simplify]: Simplified to:
   (- (sqrt (- x y)) (sqrt (+ x y)))
0.096 * [progress]: [Phase 3 of 3] Extracting.
0.101 * [simplify]: Simplifying using  #<procedure:simplify-batch-egg> :
   (- (sqrt (- x y)) (sqrt (+ x y)))
0.102 * * [simplify]: iteration  0 :  8  enodes  (cost  5 )
0.102 * * [simplify]: iteration  1 :  8  enodes  (cost  5 )
0.102 * [simplify]: Simplified to:
   (- (sqrt (- x y)) (sqrt (+ x y)))
2.929 * [regime-testing]: End program error score: 51.729904372167574