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

Optimize a model with 676 rows, 53 columns and 1352 nonzeros
Presolve removed 471 rows and 0 columns
Presolve time: 0.01s
Presolved: 205 rows, 53 columns, 1140 nonzeros
Variable types: 0 continuous, 53 integer (53 binary)
Found heuristic solution: objective 7.0000000

Root relaxation: objective 9.735568e+00, 109 iterations, 0.00 seconds

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

     0     0    9.73557    0   49    7.00000    9.73557  39.1%     -    0s
     0     0    9.34468    0   46    7.00000    9.34468  33.5%     -    0s
H    0     0                       8.0000000    9.34468  16.8%     -    0s
     0     0    9.27110    0   51    8.00000    9.27110  15.9%     -    0s
     0     0    9.21210    0   49    8.00000    9.21210  15.2%     -    0s
     0     0    9.18305    0   50    8.00000    9.18305  14.8%     -    0s
     0     0    9.11967    0   50    8.00000    9.11967  14.0%     -    0s
     0     0    9.07839    0   48    8.00000    9.07839  13.5%     -    0s
     0     0    9.07026    0   48    8.00000    9.07026  13.4%     -    0s
     0     0    9.05891    0   48    8.00000    9.05891  13.2%     -    0s
     0     0    9.02768    0   46    8.00000    9.02768  12.8%     -    0s
     0     0     cutoff    0         8.00000    8.99999  12.5%     -    0s

Cutting planes:
  Clique: 22
  Zero half: 4

Explored 0 nodes (332 simplex iterations) in 0.07 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%