1.143 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.056 * * * [progress]: [2/2] Setting up program.
0.059 * [progress]: [Phase 2 of 3] Improving.
0.059 * [simplify]: Simplifying using  #<procedure:simplify-batch-egg> :
   (- (sqrt (- x y)) (sqrt x))
0.061 * * [simplify]: iteration  0 :  10  enodes  (cost  4 )
0.062 * * [simplify]: iteration  1 :  12  enodes  (cost  4 )
0.063 * * [simplify]: iteration  2 :  12  enodes  (cost  4 )
0.063 * [simplify]: Simplified to:
   (- (sqrt (- x y)) (sqrt x))
0.063 * [progress]: [Phase 3 of 3] Extracting.
0.066 * [simplify]: Simplifying using  #<procedure:simplify-batch-egg> :
   (- (sqrt (- x y)) (sqrt x))
0.066 * * [simplify]: iteration  0 :  6  enodes  (cost  4 )
0.066 * [simplify]: Simplified to:
   (- (sqrt (- x y)) (sqrt x))
1.832 * [regime-testing]: End program error score: 34.84295467410769