Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:23:03 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 5.839300e+04, 1273 iterations, 0.03 seconds

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

     0     0 58393.0018    0    9          - 58393.0018     -      -    0s
H    0     0                    60065.000000 58393.0018  2.78%     -    0s
     0     0 59003.2242    0    4 60065.0000 59003.2242  1.77%     -    0s
H    0     0                    59347.000000 59003.2242  0.58%     -    0s
     0     0 59097.8887    0    4 59347.0000 59097.8887  0.42%     -    0s
     0     0 59119.0635    0    5 59347.0000 59119.0635  0.38%     -    0s
     0     0 59120.2365    0    4 59347.0000 59120.2365  0.38%     -    0s
     0     0 59120.9417    0    4 59347.0000 59120.9417  0.38%     -    0s
     0     0 59124.0253    0    4 59347.0000 59124.0253  0.38%     -    0s
     0     0 59124.1916    0    4 59347.0000 59124.1916  0.38%     -    0s
     0     0 59124.4800    0    4 59347.0000 59124.4800  0.37%     -    0s
     0     0 59125.0401    0    4 59347.0000 59125.0401  0.37%     -    0s
H    0     0                    59206.000000 59125.0401  0.14%     -    0s
     0     0 59125.0401    0    7 59206.0000 59125.0401  0.14%     -    0s
     0     0 59125.0401    0    3 59206.0000 59125.0401  0.14%     -    0s
     0     0 59127.0828    0    3 59206.0000 59127.0828  0.13%     -    0s
     0     0 59128.4106    0    3 59206.0000 59128.4106  0.13%     -    0s
     0     0 59128.4739    0    2 59206.0000 59128.4739  0.13%     -    0s
     0     0 59168.4903    0    3 59206.0000 59168.4903  0.06%     -    0s
     0     0 59196.6579    0    2 59206.0000 59196.6579  0.02%     -    1s
     0     0 59198.9412    0    2 59206.0000 59198.9412  0.01%     -    1s
     0     0 59199.1765    0    1 59206.0000 59199.1765  0.01%     -    1s
     0     1 59202.0000    0    1 59206.0000 59202.0000  0.01%     -    1s

Cutting planes:
  Implied bound: 43
  Flow cover: 4

Explored 1 nodes (2562 simplex iterations) in 1.11 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.920600000000e+04, best bound 5.920200000000e+04, gap 0.0068%