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

Optimize a model with 574 rows, 48 columns and 1148 nonzeros
Presolve removed 414 rows and 0 columns
Presolve time: 0.01s
Presolved: 160 rows, 48 columns, 923 nonzeros
Variable types: 0 continuous, 48 integer (48 binary)
Found heuristic solution: objective 6.0000000

Root relaxation: objective 8.578723e+00, 96 iterations, 0.00 seconds

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

     0     0    8.57872    0   45    6.00000    8.57872  43.0%     -    0s
H    0     0                       7.0000000    8.57872  22.6%     -    0s
     0     0    8.34974    0   45    7.00000    8.34974  19.3%     -    0s
H    0     0                       8.0000000    8.34974  4.37%     -    0s

Cutting planes:
  Clique: 6
  Zero half: 8

Explored 0 nodes (138 simplex iterations) in 0.02 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%