Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:44:58 2012

Optimize a model with 1759 rows, 83 columns and 3518 nonzeros
Presolve removed 1255 rows and 0 columns
Presolve time: 0.05s
Presolved: 504 rows, 83 columns, 3429 nonzeros
Variable types: 0 continuous, 83 integer (83 binary)
Found heuristic solution: objective 7.0000000

Root relaxation: objective 1.216803e+01, 321 iterations, 0.01 seconds

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

     0     0   12.16803    0   75    7.00000   12.16803  73.8%     -    0s
H    0     0                       8.0000000   12.16803  52.1%     -    0s
     0     0   11.66653    0   83    8.00000   11.66653  45.8%     -    0s
     0     0   11.61639    0   82    8.00000   11.61639  45.2%     -    0s
     0     0   11.57894    0   82    8.00000   11.57894  44.7%     -    0s
     0     0   11.55430    0   83    8.00000   11.55430  44.4%     -    0s
     0     0   11.53882    0   82    8.00000   11.53882  44.2%     -    0s
     0     0   11.51767    0   82    8.00000   11.51767  44.0%     -    0s
     0     0   11.51526    0   83    8.00000   11.51526  43.9%     -    0s
     0     0   11.51526    0   83    8.00000   11.51526  43.9%     -    0s
     0     2   11.51268    0   83    8.00000   11.51268  43.9%     -    0s

Cutting planes:
  Clique: 71
  Zero half: 3

Explored 76 nodes (4609 simplex iterations) in 0.70 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%