Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:22:50 2013

Optimize a model with 616 rows, 31416 columns and 62776 nonzeros
Presolve time: 0.04s
Presolved: 616 rows, 31416 columns, 62776 nonzeros
Variable types: 31360 continuous, 56 integer (56 binary)

Root relaxation: objective 5.304994e+04, 1117 iterations, 0.03 seconds

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

     0     0 53049.9399    0    6          - 53049.9399     -      -    0s
H    0     0                    53880.000000 53049.9399  1.54%     -    0s
H    0     0                    53548.000000 53049.9399  0.93%     -    0s
     0     0 53476.8075    0    3 53548.0000 53476.8075  0.13%     -    0s
     0     0 53494.6518    0    4 53548.0000 53494.6518  0.10%     -    0s
     0     0 53494.6518    0    6 53548.0000 53494.6518  0.10%     -    0s
     0     0 53494.6518    0    3 53548.0000 53494.6518  0.10%     -    0s
     0     0 53494.6518    0    2 53548.0000 53494.6518  0.10%     -    0s
     0     0 53494.6518    0    4 53548.0000 53494.6518  0.10%     -    0s
     0     0 53496.5580    0    3 53548.0000 53496.5580  0.10%     -    0s
     0     0 53497.1426    0    2 53548.0000 53497.1426  0.09%     -    0s
     0     0 53497.1426    0    2 53548.0000 53497.1426  0.09%     -    0s
     0     0 53508.4658    0    1 53548.0000 53508.4658  0.07%     -    0s
     0     2 53510.3929    0    1 53548.0000 53510.3929  0.07%     -    0s

Cutting planes:
  Implied bound: 67
  Flow cover: 2

Explored 4 nodes (2545 simplex iterations) in 0.73 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.354800000000e+04, best bound 5.354800000000e+04, gap 0.0%