Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:15:17 2013

Optimize a model with 27664 rows, 27144 columns and 108264 nonzeros
Presolve removed 52 rows and 0 columns
Presolve time: 0.12s
Presolved: 27612 rows, 27144 columns, 108212 nonzeros
Variable types: 27092 continuous, 52 integer (52 binary)

Root relaxation: objective 4.219983e+04, 3240 iterations, 1.05 seconds

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

     0     0 42199.8311    0   40          - 42199.8311     -      -    1s
H    0     0                    52222.000000 42199.8311  19.2%     -    2s
     0     0 47586.0732    0   10 52222.0000 47586.0732  8.88%     -    3s
     0     0 47651.5124    0    7 52222.0000 47651.5124  8.75%     -    3s
H    0     0                    51141.621037 47651.5124  6.82%     -    3s
H    0     0                    49966.000000 47651.5124  4.63%     -    3s
H    0     0                    49892.000000 47651.5124  4.49%     -    3s
     0     0 47662.8526    0    5 49892.0000 47662.8526  4.47%     -    3s
H    0     0                    48056.000000 47662.8526  0.82%     -    3s
H    0     0                    47936.000000 47662.8526  0.57%     -    4s
     0     0 47663.1379    0    4 47936.0000 47663.1379  0.57%     -    4s
     0     0 47666.3408    0    3 47936.0000 47666.3408  0.56%     -    4s
     0     2 47670.4713    0    3 47936.0000 47670.4713  0.55%     -    4s
H    3     3                    47797.640000 47716.8396  0.17%  89.7    4s
*    4     2               4    47741.000000 47716.8396  0.05%  98.5    4s
     6     1 47737.0000    1    2 47741.0000 47737.0000  0.01%  83.8    5s

Cutting planes:
  Implied bound: 44

Explored 7 nodes (5597 simplex iterations) in 5.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.774100000000e+04, best bound 4.773700000000e+04, gap 0.0084%