Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:59:57 2013

Optimize a model with 43744 rows, 4096 columns and 133120 nonzeros
Presolve removed 5087 rows and 2129 columns
Presolve time: 0.87s
Presolved: 38657 rows, 1967 columns, 117889 nonzeros
Variable types: 32 continuous, 1935 integer (1935 binary)
Found heuristic solution: objective 83955.000000

Root relaxation: objective 6.413569e+04, 16430 iterations, 1.32 seconds

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

     0     0 64135.6930    0   14 83955.0000 64135.6930  23.6%     -    2s
H    0     0                    64161.000000 64135.6930  0.04%     -    2s
H    0     0                    64149.000000 64135.6930  0.02%     -    2s
     0     0 64136.4360    0   26 64149.0000 64136.4360  0.02%     -    2s
     0     0 64136.4360    0   11 64149.0000 64136.4360  0.02%     -    2s
     0     0 64136.4360    0   26 64149.0000 64136.4360  0.02%     -    2s
H    0     0                    64147.000000 64136.4360  0.02%     -    2s
     0     2 64136.7222    0   24 64147.0000 64136.7222  0.02%     -    2s
H    8     6                    64144.000000 64136.7222  0.01%   3.2    3s
H   11     7                    64142.000000 64136.7222  0.01%   2.4    3s

Cutting planes:
  Gomory: 3
  MIR: 5
  Zero half: 1

Explored 11 nodes (18810 simplex iterations) in 3.13 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.414200000000e+04, best bound 6.413700000000e+04, gap 0.0078%