Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:59:45 2013

Optimize a model with 41727 rows, 3969 columns and 127008 nonzeros
Presolve removed 5222 rows and 2046 columns
Presolve time: 0.32s
Presolved: 36505 rows, 1923 columns, 111073 nonzeros
Variable types: 26 continuous, 1897 integer (1897 binary)
Found heuristic solution: objective 89126.000000

Root relaxation: objective 7.068850e+04, 7302 iterations, 0.49 seconds

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

     0     0 70688.5000    0    8 89126.0000 70688.5000  20.7%     -    1s
H    0     0                    70702.000000 70688.5000  0.02%     -    1s
H    0     0                    70698.000000 70688.5000  0.01%     -    1s
     0     0 70690.1196    0   25 70698.0000 70690.1196  0.01%     -    1s
     0     0 70690.1196    0    9 70698.0000 70690.1196  0.01%     -    1s
     0     0 70690.3537    0   20 70698.0000 70690.3537  0.01%     -    1s
     0     1 70690.3537    0   20 70698.0000 70690.3537  0.01%     -    1s

Cutting planes:
  Gomory: 7
  Cover: 2
  MIR: 12
  Zero half: 2

Explored 5 nodes (9672 simplex iterations) in 1.54 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.069800000000e+04, best bound 7.069200000000e+04, gap 0.0085%