Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:06:27 2013

Optimize a model with 46988 rows, 46308 columns and 185028 nonzeros
Presolve removed 457 rows and 0 columns
Presolve time: 0.27s
Presolved: 46531 rows, 46308 columns, 184114 nonzeros
Variable types: 46240 continuous, 68 integer (68 binary)

Root relaxation: objective 5.982458e+04, 7309 iterations, 1.36 seconds

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

     0     0 59824.5794    0    7          - 59824.5794     -      -    1s
H    0     0                    61668.000000 59824.5794  2.99%     -    1s
H    0     0                    60173.000000 59824.5794  0.58%     -    2s
     0     0 59830.6461    0    8 60173.0000 59830.6461  0.57%     -    2s
     0     0 59830.8836    0    8 60173.0000 59830.8836  0.57%     -    2s
     0     0 59830.9012    0    9 60173.0000 59830.9012  0.57%     -    2s
     0     0 59830.9441    0    8 60173.0000 59830.9441  0.57%     -    3s
     0     0 59830.9441    0    8 60173.0000 59830.9441  0.57%     -    3s
     0     0 59830.9441    0    8 60173.0000 59830.9441  0.57%     -    3s
H    0     0                    59936.000000 59830.9441  0.18%     -    4s
     0     0 59920.0578    0    2 59936.0000 59920.0578  0.03%     -    5s
     0     0 59920.8295    0    2 59936.0000 59920.8295  0.03%     -    5s
     0     0 59920.8295    0    2 59936.0000 59920.8295  0.03%     -    5s
     0     0 59930.0764    0    2 59936.0000 59930.0764  0.01%     -    5s

Cutting planes:
  Gomory: 1
  Flow cover: 1

Explored 0 nodes (9155 simplex iterations) in 5.99 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.993600000000e+04, best bound 5.993007644883e+04, gap 0.0099%