Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:34:00 2013

Optimize a model with 660 rows, 36060 columns and 72060 nonzeros
Presolve time: 0.05s
Presolved: 660 rows, 36060 columns, 72060 nonzeros
Variable types: 36000 continuous, 60 integer (60 binary)

Root relaxation: objective 5.499509e+04, 1028 iterations, 0.03 seconds

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

     0     0 54995.0898    0   14          - 54995.0898     -      -    0s
H    0     0                    58684.000000 54995.0898  6.29%     -    0s
H    0     0                    55643.000000 54995.0898  1.16%     -    0s
     0     0 55393.8622    0    9 55643.0000 55393.8622  0.45%     -    0s
     0     0 55424.4057    0    4 55643.0000 55424.4057  0.39%     -    0s
     0     0 55424.4057    0   14 55643.0000 55424.4057  0.39%     -    0s
     0     0 55424.4057    0    9 55643.0000 55424.4057  0.39%     -    0s
     0     0 55424.4057    0    4 55643.0000 55424.4057  0.39%     -    0s
     0     0 55424.4057    0    7 55643.0000 55424.4057  0.39%     -    0s
     0     0 55429.9070    0    6 55643.0000 55429.9070  0.38%     -    0s
     0     0 55433.2581    0    6 55643.0000 55433.2581  0.38%     -    0s
     0     0 55436.7138    0    4 55643.0000 55436.7138  0.37%     -    0s
     0     0 55436.7138    0    4 55643.0000 55436.7138  0.37%     -    0s
H    0     0                    55517.000000 55436.7138  0.14%     -    0s
     0     2 55437.6421    0    4 55517.0000 55437.6421  0.14%     -    0s
*    5     2               5    55483.000000 55479.0526  0.01%  19.0    0s

Cutting planes:
  Implied bound: 66
  Flow cover: 1

Explored 6 nodes (2315 simplex iterations) in 0.88 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.548300000000e+04, best bound 5.547905263158e+04, gap 0.0071%