Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:22:55 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 5.994533e+04, 1183 iterations, 0.03 seconds

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

     0     0 59945.3285    0   12          - 59945.3285     -      -    0s
H    0     0                    63738.000000 59945.3285  5.95%     -    0s
H    0     0                    60705.000000 59945.3285  1.25%     -    0s
     0     0 60258.7829    0    6 60705.0000 60258.7829  0.74%     -    0s
     0     0 60277.2586    0    7 60705.0000 60277.2586  0.70%     -    0s
     0     0 60288.3193    0    6 60705.0000 60288.3193  0.69%     -    0s
     0     0 60292.6610    0    7 60705.0000 60292.6610  0.68%     -    0s
     0     0 60296.1103    0    7 60705.0000 60296.1103  0.67%     -    0s
     0     0 60298.0928    0    6 60705.0000 60298.0928  0.67%     -    0s
     0     0 60298.4766    0    9 60705.0000 60298.4766  0.67%     -    0s
     0     0 60298.7328    0    6 60705.0000 60298.7328  0.67%     -    0s
     0     0 60298.9278    0    6 60705.0000 60298.9278  0.67%     -    0s
H    0     0                    60389.000000 60298.9278  0.15%     -    0s
     0     2 60299.3178    0    6 60389.0000 60299.3178  0.15%     -    0s

Cutting planes:
  Implied bound: 130
  Flow cover: 17

Explored 14 nodes (2117 simplex iterations) in 1.10 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.038900000000e+04, best bound 6.038900000000e+04, gap 0.0%