Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:03:30 2013

Optimize a model with 495 rows, 20295 columns and 40545 nonzeros
Presolve time: 0.03s
Presolved: 495 rows, 20295 columns, 40545 nonzeros
Variable types: 20250 continuous, 45 integer (45 binary)

Root relaxation: objective 4.740684e+04, 901 iterations, 0.02 seconds

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

     0     0 47406.8391    0    7          - 47406.8391     -      -    0s
H    0     0                    49368.000000 47406.8391  3.97%     -    0s
H    0     0                    47798.000000 47406.8391  0.82%     -    0s
     0     0 47675.5646    0    4 47798.0000 47675.5646  0.26%     -    0s
     0     0 47683.6190    0    4 47798.0000 47683.6190  0.24%     -    0s
     0     0 47683.6190    0    6 47798.0000 47683.6190  0.24%     -    0s
     0     0 47683.6190    0    4 47798.0000 47683.6190  0.24%     -    0s
     0     0 47683.6190    0    4 47798.0000 47683.6190  0.24%     -    0s
     0     0 47687.6735    0    3 47798.0000 47687.6735  0.23%     -    0s
     0     0 47687.6801    0    3 47798.0000 47687.6801  0.23%     -    0s
     0     0 47688.9741    0    4 47798.0000 47688.9741  0.23%     -    0s
     0     0 47689.0941    0    3 47798.0000 47689.0941  0.23%     -    0s
     0     0 47795.8400    0    1 47798.0000 47795.8400  0.00%     -    0s

Cutting planes:
  Implied bound: 68
  Flow cover: 5

Explored 0 nodes (2133 simplex iterations) in 0.44 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.779800000000e+04, best bound 4.779584000000e+04, gap 0.0045%