14.331 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.083 * * * [progress]: [2/2] Setting up program.
0.086 * [progress]: [Phase 2 of 3] Improving.
0.086 * [simplify]: Simplifying using  #<procedure:simplify-batch-egg> :
   (cos (* (+ x y) (- x y)))
0.088 * * [simplify]: iteration  0 :  10  enodes  (cost  4 )
0.089 * * [simplify]: iteration  1 :  25  enodes  (cost  4 )
0.090 * * [simplify]: iteration  2 :  54  enodes  (cost  4 )
0.092 * * [simplify]: iteration  3 :  131  enodes  (cost  4 )
0.094 * * [simplify]: iteration  4 :  206  enodes  (cost  4 )
0.097 * * [simplify]: iteration  5 :  296  enodes  (cost  4 )
0.101 * * [simplify]: iteration  6 :  447  enodes  (cost  4 )
0.108 * * [simplify]: iteration  7 :  1304  enodes  (cost  4 )
0.147 * * [simplify]: iteration  8 :  5001  enodes  (cost  4 )
0.147 * [simplify]: Simplified to:
   (cos (* (+ x y) (- x y)))
0.147 * [progress]: [Phase 3 of 3] Extracting.
0.150 * [simplify]: Simplifying using  #<procedure:simplify-batch-egg> :
   (cos (* (+ x y) (- x y)))
0.150 * * [simplify]: iteration  0 :  8  enodes  (cost  4 )
0.151 * * [simplify]: iteration  1 :  8  enodes  (cost  4 )
0.151 * [simplify]: Simplified to:
   (cos (* (+ x y) (- x y)))
2.845 * [regime-testing]: End program error score: 45.13300062319686