Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:17 2012

Optimize a model with 581 rows, 49 columns and 1162 nonzeros
Presolve removed 388 rows and 0 columns
Presolve time: 0.01s
Presolved: 193 rows, 49 columns, 1034 nonzeros
Variable types: 0 continuous, 49 integer (49 binary)
Found heuristic solution: objective 6.0000000

Root relaxation: objective 9.278443e+00, 101 iterations, 0.00 seconds

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

     0     0    9.27844    0   45    6.00000    9.27844  54.6%     -    0s
     0     0    8.97054    0   47    6.00000    8.97054  49.5%     -    0s
     0     0    8.92662    0   48    6.00000    8.92662  48.8%     -    0s
     0     0    8.87699    0   47    6.00000    8.87699  47.9%     -    0s
     0     0    8.86468    0   48    6.00000    8.86468  47.7%     -    0s
H    0     0                       7.0000000    8.86468  26.6%     -    0s
     0     0    8.86337    0   48    7.00000    8.86337  26.6%     -    0s
H    0     0                       8.0000000    8.86337  10.8%     -    0s

Cutting planes:
  Gomory: 1
  Clique: 14
  Zero half: 7

Explored 0 nodes (244 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%