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

Optimize a model with 638 rows, 51 columns and 1276 nonzeros
Presolve removed 437 rows and 0 columns
Presolve time: 0.01s
Presolved: 201 rows, 51 columns, 1121 nonzeros
Variable types: 0 continuous, 51 integer (51 binary)
Found heuristic solution: objective 7.0000000

Root relaxation: objective 9.364780e+00, 99 iterations, 0.00 seconds

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

     0     0    9.36478    0   41    7.00000    9.36478  33.8%     -    0s
     0     0    9.06087    0   49    7.00000    9.06087  29.4%     -    0s
     0     0    8.99256    0   48    7.00000    8.99256  28.5%     -    0s
     0     0    8.93586    0   50    7.00000    8.93586  27.7%     -    0s
     0     0    8.89808    0   49    7.00000    8.89808  27.1%     -    0s
     0     0    8.89683    0   50    7.00000    8.89683  27.1%     -    0s
     0     2    8.89655    0   50    7.00000    8.89655  27.1%     -    0s
*   10     1               2       8.0000000    8.06667  0.83%  34.5    0s

Cutting planes:
  Clique: 20
  Zero half: 8

Explored 11 nodes (577 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%