Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:45:33 2012

Optimize a model with 1891 rows, 87 columns and 3782 nonzeros
Presolve removed 1351 rows and 0 columns
Presolve time: 0.06s
Presolved: 540 rows, 87 columns, 3550 nonzeros
Variable types: 0 continuous, 87 integer (87 binary)
Found heuristic solution: objective 7.0000000

Root relaxation: objective 1.338274e+01, 303 iterations, 0.01 seconds

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

     0     0   13.38274    0   79    7.00000   13.38274  91.2%     -    0s
H    0     0                       8.0000000   13.38274  67.3%     -    0s
     0     0   12.75934    0   84    8.00000   12.75934  59.5%     -    0s
     0     0   12.64095    0   83    8.00000   12.64095  58.0%     -    0s
     0     0   12.58853    0   84    8.00000   12.58853  57.4%     -    0s
     0     0   12.58437    0   84    8.00000   12.58437  57.3%     -    0s
     0     0   12.58217    0   84    8.00000   12.58217  57.3%     -    0s
     0     0   12.57632    0   84    8.00000   12.57632  57.2%     -    0s
     0     0   12.57438    0   84    8.00000   12.57438  57.2%     -    0s
     0     0   12.57431    0   84    8.00000   12.57431  57.2%     -    0s
     0     2   12.57338    0   84    8.00000   12.57338  57.2%     -    0s
*   49    20               4       9.0000000   12.26671  36.3%  56.2    0s

Cutting planes:
  Clique: 70
  Zero half: 2

Explored 84 nodes (5393 simplex iterations) in 0.77 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 9.000000000000e+00, best bound 9.000000000000e+00, gap 0.0%