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

Optimize a model with 658 rows, 52 columns and 1316 nonzeros
Presolve removed 452 rows and 0 columns
Presolve time: 0.01s
Presolved: 206 rows, 52 columns, 1176 nonzeros
Variable types: 0 continuous, 52 integer (52 binary)
Found heuristic solution: objective 6.0000000

Root relaxation: objective 9.317035e+00, 100 iterations, 0.00 seconds

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

     0     0    9.31703    0   46    6.00000    9.31703  55.3%     -    0s
H    0     0                       7.0000000    9.31703  33.1%     -    0s
     0     0    9.03483    0   47    7.00000    9.03483  29.1%     -    0s
     0     0    8.97521    0   48    7.00000    8.97521  28.2%     -    0s
     0     0    8.94881    0   48    7.00000    8.94881  27.8%     -    0s
     0     0    8.93963    0   47    7.00000    8.93963  27.7%     -    0s
     0     0    8.93640    0   46    7.00000    8.93640  27.7%     -    0s
H    0     0                       8.0000000    8.93640  11.7%     -    0s

Cutting planes:
  Clique: 16
  Zero half: 9

Explored 0 nodes (251 simplex iterations) in 0.05 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%