Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:59:09 2013

Optimize a model with 39773 rows, 3844 columns and 121086 nonzeros
Presolve removed 2786 rows and 1933 columns
Presolve time: 0.35s
Presolved: 36987 rows, 1911 columns, 113023 nonzeros
Variable types: 35 continuous, 1876 integer (1876 binary)
Found heuristic solution: objective 89293.000000

Root relaxation: objective 6.162581e+04, 16791 iterations, 1.29 seconds

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

     0     0 61625.8095    0   18 89293.0000 61625.8095  31.0%     -    1s
H    0     0                    61638.000000 61625.8095  0.02%     -    1s
     0     0 61625.8095    0   30 61638.0000 61625.8095  0.02%     -    1s
     0     0 61625.8095    0   12 61638.0000 61625.8095  0.02%     -    2s
     0     0 61626.0000    0   18 61638.0000 61626.0000  0.02%     -    2s
H    0     0                    61636.000000 61626.0000  0.02%     -    2s
     0     2 61626.0000    0   18 61636.0000 61626.0000  0.02%     -    2s
H  529   209                    61634.000000 61627.4762  0.01%  30.5    3s

Cutting planes:
  Gomory: 14
  Cover: 6
  Implied bound: 1
  MIR: 44
  Zero half: 8

Explored 616 nodes (40496 simplex iterations) in 4.12 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.163400000000e+04, best bound 6.162800000000e+04, gap 0.0097%