Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:20:21 2013

Optimize a model with 30855 rows, 30305 columns and 121055 nonzeros
Presolve removed 1842 rows and 0 columns
Presolve time: 0.17s
Presolved: 29013 rows, 30305 columns, 117371 nonzeros
Variable types: 30250 continuous, 55 integer (55 binary)

Root relaxation: objective 5.398564e+04, 4449 iterations, 0.54 seconds

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

     0     0 53985.6428    0    5          - 53985.6428     -      -    0s
H    0     0                    54497.000000 53985.6428  0.94%     -    0s
H    0     0                    54094.000000 53985.6428  0.20%     -    1s
     0     0 53987.1060    0    6 54094.0000 53987.1060  0.20%     -    1s
     0     0 53987.1060    0    5 54094.0000 53987.1060  0.20%     -    1s
     0     0 53987.1060    0    6 54094.0000 53987.1060  0.20%     -    1s
     0     0 53987.6188    0    5 54094.0000 53987.6188  0.20%     -    1s
     0     0 53987.7232    0    6 54094.0000 53987.7232  0.20%     -    2s
     0     0 53987.7612    0    6 54094.0000 53987.7612  0.20%     -    2s
     0     0 54080.7859    0    5 54094.0000 54080.7859  0.02%     -    2s
     0     0 54081.9840    0    2 54094.0000 54081.9840  0.02%     -    2s
     0     0 54082.0811    0    1 54094.0000 54082.0811  0.02%     -    2s
     0     2 54082.3333    0    1 54094.0000 54082.3333  0.02%     -    2s

Cutting planes:
  Gomory: 1
  Flow cover: 1

Explored 3 nodes (6606 simplex iterations) in 2.74 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.409400000000e+04, best bound 5.409400000000e+04, gap 0.0%