Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:09:42 2013

Optimize a model with 24598 rows, 24108 columns and 96138 nonzeros
Presolve removed 49 rows and 0 columns
Presolve time: 0.10s
Presolved: 24549 rows, 24108 columns, 96089 nonzeros
Variable types: 24059 continuous, 49 integer (49 binary)

Root relaxation: objective 3.981668e+04, 2951 iterations, 0.92 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0 39816.6841    0   40          - 39816.6841     -      -    1s
H    0     0                    52918.000000 39816.6841  24.8%     -    1s
     0     0 48593.9942    0    6 52918.0000 48593.9942  8.17%     -    3s
H    0     0                    51045.016098 48593.9942  4.80%     -    3s
H    0     0                    49625.000000 48593.9942  2.08%     -    3s
H    0     0                    49431.000000 48593.9942  1.69%     -    3s
     0     0 48728.0146    0    4 49431.0000 48728.0146  1.42%     -    3s
     0     0 48738.3846    0    1 49431.0000 48738.3846  1.40%     -    3s
H    0     0                    49228.000000 48738.3846  0.99%     -    3s
     0     2 48740.8000    0    1 49228.0000 48740.8000  0.99%     -    3s
H   11     6                    49202.967742 48900.1781  0.62%  65.9    4s
*   12     6              10    49116.000000 48900.1781  0.44%  64.0    4s
H   16     7                    49008.520000 48903.1692  0.21%  58.1    4s
H   18     8                    48986.483871 48903.1692  0.17%  54.4    4s
*   19     7               8    48941.000000 48903.1692  0.08%  52.6    4s

Cutting planes:
  Gomory: 2
  Implied bound: 44

Explored 26 nodes (6041 simplex iterations) in 4.41 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.894100000000e+04, best bound 4.894100000000e+04, gap 0.0%