Gurobi 5.0.1 (linux64) logging started Mon Feb  4 19:03:24 2013

Optimize a model with 54809 rows, 4761 columns and 166635 nonzeros
Presolve removed 5330 rows and 2431 columns
Presolve time: 0.44s
Presolved: 49479 rows, 2330 columns, 150416 nonzeros
Variable types: 30 continuous, 2300 integer (2300 binary)
Found heuristic solution: objective 84604.000000

Root relaxation: objective 6.142255e+04, 19661 iterations, 1.92 seconds

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

     0     0 61422.5455    0   20 84604.0000 61422.5455  27.4%     -    2s
H    0     0                    61447.000000 61422.5455  0.04%     -    2s
H    0     0                    61446.000000 61422.5455  0.04%     -    2s
H    0     0                    61435.000000 61422.5455  0.02%     -    2s
     0     0 61422.5455    0   30 61435.0000 61422.5455  0.02%     -    2s
     0     0 61422.5455    0   13 61435.0000 61422.5455  0.02%     -    3s
H    0     0                    61433.000000 61422.5455  0.02%     -    3s
H    0     0                    61431.000000 61422.5455  0.01%     -    3s
     0     0 61422.5455    0   41 61431.0000 61422.5455  0.01%     -    3s
     0     1 61422.5581    0   41 61431.0000 61422.5581  0.01%     -    3s
H  143    99                    61429.000000 61422.9512  0.01%  34.9    4s

Cutting planes:
  MIR: 5

Explored 143 nodes (28469 simplex iterations) in 4.30 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.142900000000e+04, best bound 6.142300000000e+04, gap 0.0098%