Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:01:20 2013

Optimize a model with 473 rows, 18533 columns and 37023 nonzeros
Presolve time: 0.03s
Presolved: 473 rows, 18533 columns, 37023 nonzeros
Variable types: 18490 continuous, 43 integer (43 binary)

Root relaxation: objective 4.711985e+04, 859 iterations, 0.02 seconds

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

     0     0 47119.8487    0    6          - 47119.8487     -      -    0s
H    0     0                    48771.000000 47119.8487  3.39%     -    0s
     0     0 47446.7542    0    4 48771.0000 47446.7542  2.72%     -    0s
H    0     0                    47598.000000 47446.7542  0.32%     -    0s
     0     0 47477.2559    0    2 47598.0000 47477.2559  0.25%     -    0s
     0     0 47477.2559    0    6 47598.0000 47477.2559  0.25%     -    0s
H    0     0                    47597.000000 47477.2559  0.25%     -    0s
     0     0 47477.2559    0    4 47597.0000 47477.2559  0.25%     -    0s
     0     0 47477.2559    0    2 47597.0000 47477.2559  0.25%     -    0s
H    0     0                    47483.000000 47477.2559  0.01%     -    0s
     0     0 47477.3030    0    1 47483.0000 47477.3030  0.01%     -    0s
     0     0 47477.3818    0    2 47483.0000 47477.3818  0.01%     -    0s
     0     0 47477.4348    0    1 47483.0000 47477.4348  0.01%     -    0s
     0     0 47477.6064    0    3 47483.0000 47477.6064  0.01%     -    0s
H    0     0                    47479.000000 47477.6064  0.00%     -    0s

Cutting planes:
  Implied bound: 46
  Flow cover: 2

Explored 0 nodes (1830 simplex iterations) in 0.36 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.747900000000e+04, best bound 4.747760636183e+04, gap 0.0029%