Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:59:42 2013

Optimize a model with 41727 rows, 3969 columns and 127008 nonzeros
Presolve removed 2880 rows and 2000 columns
Presolve time: 0.30s
Presolved: 38847 rows, 1969 columns, 118399 nonzeros
Variable types: 31 continuous, 1938 integer (1938 binary)
Found heuristic solution: objective 89824.000000

Root relaxation: objective 6.265937e+04, 10620 iterations, 0.79 seconds

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

     0     0 62659.3661    0   18 89824.0000 62659.3661  30.2%     -    1s
H    0     0                    62682.000000 62659.3661  0.04%     -    1s
H    0     0                    62679.000000 62659.3661  0.03%     -    1s
     0     0 62659.6087    0   26 62679.0000 62659.6087  0.03%     -    1s
     0     0 62659.6087    0   12 62679.0000 62659.6087  0.03%     -    1s
H    0     0                    62667.000000 62659.6087  0.01%     -    1s
     0     0 62659.8625    0   30 62667.0000 62659.8625  0.01%     -    2s
     0     1 62659.8634    0   25 62667.0000 62659.8634  0.01%     -    2s
H    6     4                    62663.000000 62660.0000  0.00%   4.5    2s

Cutting planes:
  Gomory: 1
  Cover: 1
  MIR: 6
  Zero half: 1

Explored 6 nodes (15140 simplex iterations) in 2.25 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.266300000000e+04, best bound 6.266000000000e+04, gap 0.0048%