Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:18 2012

Optimize a model with 625 rows, 51 columns and 1250 nonzeros
Presolve removed 431 rows and 0 columns
Presolve time: 0.01s
Presolved: 194 rows, 51 columns, 1079 nonzeros
Variable types: 0 continuous, 51 integer (51 binary)
Found heuristic solution: objective 6.0000000

Root relaxation: objective 9.412639e+00, 104 iterations, 0.00 seconds

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

     0     0    9.41264    0   46    6.00000    9.41264  56.9%     -    0s
H    0     0                       7.0000000    9.41264  34.5%     -    0s
     0     0    9.11616    0   49    7.00000    9.11616  30.2%     -    0s
     0     0    9.03898    0   47    7.00000    9.03898  29.1%     -    0s
     0     0    9.02427    0   50    7.00000    9.02427  28.9%     -    0s
H    0     0                       8.0000000    9.02427  12.8%     -    0s
     0     0     cutoff    0         8.00000    8.99999  12.5%     -    0s

Cutting planes:
  Gomory: 2
  Clique: 20
  Zero half: 2

Explored 0 nodes (206 simplex iterations) in 0.04 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%