Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:14:03 2013

Optimize a model with 27612 rows, 27092 columns and 108212 nonzeros
Presolve removed 1259 rows and 0 columns
Presolve time: 0.15s
Presolved: 26353 rows, 27092 columns, 105694 nonzeros
Variable types: 27040 continuous, 52 integer (52 binary)

Root relaxation: objective 4.766314e+04, 3453 iterations, 0.33 seconds

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

     0     0 47663.1379    0    4          - 47663.1379     -      -    0s
H    0     0                    47936.000000 47663.1379  0.57%     -    0s
     0     0 47673.8083    0    6 47936.0000 47673.8083  0.55%     -    0s
     0     0 47673.9133    0    6 47936.0000 47673.9133  0.55%     -    0s
     0     0 47673.9133    0    6 47936.0000 47673.9133  0.55%     -    1s
     0     0 47677.3544    0    4 47936.0000 47677.3544  0.54%     -    1s
     0     0 47677.3544    0    3 47936.0000 47677.3544  0.54%     -    1s
     0     0 47677.4004    0    4 47936.0000 47677.4004  0.54%     -    2s
     0     0 47677.4004    0    4 47936.0000 47677.4004  0.54%     -    2s
     0     2 47677.6187    0    4 47936.0000 47677.6187  0.54%     -    2s
H    3     3                    47797.640000 47733.0361  0.14%  39.0    2s
*    4     2               4    47741.000000 47737.0000  0.01%  37.8    2s

Cutting planes:
  Gomory: 2
  Flow cover: 3

Explored 5 nodes (5445 simplex iterations) in 2.51 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%