Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:59:28 2013

Optimize a model with 41727 rows, 3969 columns and 127008 nonzeros
Presolve removed 6537 rows and 2076 columns
Presolve time: 0.29s
Presolved: 35190 rows, 1893 columns, 106710 nonzeros
Variable types: 19 continuous, 1874 integer (1874 binary)
Found heuristic solution: objective 97329.000000

Root relaxation: objective 8.150085e+04, 5687 iterations, 0.45 seconds

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

     0     0 81500.8500    0    8 97329.0000 81500.8500  16.3%     -    0s
H    0     0                    81529.000000 81500.8500  0.03%     -    0s
H    0     0                    81517.000000 81500.8500  0.02%     -    0s
H    0     0                    81516.000000 81500.8500  0.02%     -    0s
     0     0 81501.8976    0   22 81516.0000 81501.8976  0.02%     -    1s
     0     0 81501.8976    0    8 81516.0000 81501.8976  0.02%     -    1s
H    0     0                    81515.000000 81501.8976  0.02%     -    1s
     0     0 81502.1342    0   26 81515.0000 81502.1342  0.02%     -    1s
H    0     0                    81508.000000 81502.1342  0.01%     -    1s

Cutting planes:
  Gomory: 1
  Implied bound: 9
  Clique: 1
  MIR: 4

Explored 0 nodes (6980 simplex iterations) in 1.34 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.150800000000e+04, best bound 8.150300000000e+04, gap 0.0061%