Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:20 2012

Optimize a model with 679 rows, 53 columns and 1358 nonzeros
Presolve removed 481 rows and 0 columns
Presolve time: 0.01s
Presolved: 198 rows, 53 columns, 1084 nonzeros
Variable types: 0 continuous, 53 integer (53 binary)
Found heuristic solution: objective 7.0000000

Root relaxation: objective 9.602532e+00, 116 iterations, 0.00 seconds

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

     0     0    9.60253    0   47    7.00000    9.60253  37.2%     -    0s
     0     0    9.31665    0   50    7.00000    9.31665  33.1%     -    0s
     0     0    9.20341    0   51    7.00000    9.20341  31.5%     -    0s
     0     0    9.16796    0   50    7.00000    9.16796  31.0%     -    0s
     0     0    9.14591    0   52    7.00000    9.14591  30.7%     -    0s
H    0     0                       8.0000000    9.14591  14.3%     -    0s
     0     0    9.12789    0   49    8.00000    9.12789  14.1%     -    0s
     0     0    9.11813    0   48    8.00000    9.11813  14.0%     -    0s
     0     0    9.11138    0   50    8.00000    9.11138  13.9%     -    0s
     0     0    9.11048    0   49    8.00000    9.11048  13.9%     -    0s
     0     0    9.10997    0   50    8.00000    9.10997  13.9%     -    0s
     0     0    9.10979    0   50    8.00000    9.10979  13.9%     -    0s
     0     2    9.10666    0   50    8.00000    9.10666  13.8%     -    0s

Cutting planes:
  Clique: 21
  Zero half: 5

Explored 3 nodes (339 simplex iterations) in 0.10 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%