Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:58:22 2013

Optimize a model with 36050 rows, 3600 columns and 109800 nonzeros
Presolve removed 2775 rows and 1818 columns
Presolve time: 0.24s
Presolved: 33275 rows, 1782 columns, 101478 nonzeros
Variable types: 29 continuous, 1753 integer (1753 binary)
Found heuristic solution: objective 83784.000000

Root relaxation: objective 6.442105e+04, 10405 iterations, 0.66 seconds

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

     0     0 64421.0500    0   10 83784.0000 64421.0500  23.1%     -    1s
H    0     0                    64442.000000 64421.0500  0.03%     -    1s
H    0     0                    64428.000000 64421.0500  0.01%     -    1s
     0     0 64421.2160    0   28 64428.0000 64421.2160  0.01%     -    1s
     0     0 64421.2160    0   11 64428.0000 64421.2160  0.01%     -    1s
     0     0 64421.3054    0   24 64428.0000 64421.3054  0.01%     -    1s
     0     1 64421.3093    0   24 64428.0000 64421.3093  0.01%     -    1s

Cutting planes:
  Gomory: 2
  Cover: 2
  Implied bound: 2
  Clique: 1
  MIR: 16
  GUB cover: 1
  Zero half: 12

Explored 5 nodes (11240 simplex iterations) in 1.59 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.442800000000e+04, best bound 6.442300000000e+04, gap 0.0078%