Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:45:50 2012

Optimize a model with 1996 rows, 89 columns and 3992 nonzeros
Presolve removed 1401 rows and 0 columns
Presolve time: 0.05s
Presolved: 595 rows, 89 columns, 3965 nonzeros
Variable types: 0 continuous, 89 integer (89 binary)
Found heuristic solution: objective 7.0000000

Root relaxation: objective 1.302822e+01, 299 iterations, 0.01 seconds

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

     0     0   13.02822    0   84    7.00000   13.02822  86.1%     -    0s
H    0     0                       8.0000000   13.02822  62.9%     -    0s
     0     0   12.77211    0   86    8.00000   12.77211  59.7%     -    0s
     0     0   12.60128    0   88    8.00000   12.60128  57.5%     -    0s
     0     0   12.56546    0   88    8.00000   12.56546  57.1%     -    0s
     0     0   12.51136    0   89    8.00000   12.51136  56.4%     -    0s
     0     0   12.48861    0   89    8.00000   12.48861  56.1%     -    0s
     0     0   12.48352    0   89    8.00000   12.48352  56.0%     -    0s
     0     0   12.48106    0   89    8.00000   12.48106  56.0%     -    0s
     0     0   12.47970    0   89    8.00000   12.47970  56.0%     -    0s
     0     0   12.47970    0   89    8.00000   12.47970  56.0%     -    0s
     0     0   12.47970    0   89    8.00000   12.47970  56.0%     -    0s
     0     2   12.47835    0   89    8.00000   12.47835  56.0%     -    0s
*   52    23               7       9.0000000   12.00665  33.4%  53.9    0s

Cutting planes:
  Clique: 65
  Zero half: 1

Explored 90 nodes (5236 simplex iterations) in 1.04 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%