Gurobi 5.0.1 (linux64) logging started Mon Feb  4 19:02:50 2013

Optimize a model with 54809 rows, 4761 columns and 166635 nonzeros
Presolve removed 5359 rows and 2431 columns
Presolve time: 0.42s
Presolved: 49450 rows, 2330 columns, 150330 nonzeros
Variable types: 30 continuous, 2300 integer (2300 binary)
Found heuristic solution: objective 98785.000000

Root relaxation: objective 7.685144e+04, 12002 iterations, 1.10 seconds

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

     0     0 76851.4444    0   18 98785.0000 76851.4444  22.2%     -    1s
H    0     0                    76866.000000 76851.4444  0.02%     -    1s
H    0     0                    76863.000000 76851.4444  0.02%     -    1s
     0     0 76852.2073    0   22 76863.0000 76852.2073  0.01%     -    1s
     0     0 76852.2073    0   17 76863.0000 76852.2073  0.01%     -    2s
     0     0 76852.2936    0   30 76863.0000 76852.2936  0.01%     -    2s
H    0     0                    76862.000000 76852.2936  0.01%     -    2s
     0     2 76852.4569    0   30 76862.0000 76852.4569  0.01%     -    2s
H    4     3                    76859.000000 76852.4569  0.01%   0.5    2s

Cutting planes:
  MIR: 4
  Zero half: 2

Explored 4 nodes (14236 simplex iterations) in 2.53 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.685900000000e+04, best bound 7.685300000000e+04, gap 0.0078%