Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:16 2012

Optimize a model with 537 rows, 47 columns and 1074 nonzeros
Presolve removed 370 rows and 0 columns
Presolve time: 0.01s
Presolved: 167 rows, 47 columns, 914 nonzeros
Variable types: 0 continuous, 47 integer (47 binary)
Found heuristic solution: objective 6.0000000

Root relaxation: objective 8.835616e+00, 86 iterations, 0.00 seconds

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

     0     0    8.83562    0   38    6.00000    8.83562  47.3%     -    0s
H    0     0                       7.0000000    8.83562  26.2%     -    0s
     0     0    8.48198    0   43    7.00000    8.48198  21.2%     -    0s
     0     0    8.46992    0   43    7.00000    8.46992  21.0%     -    0s
     0     0    8.44659    0   43    7.00000    8.44659  20.7%     -    0s
H    0     0                       8.0000000    8.44659  5.58%     -    0s

Cutting planes:
  Gomory: 2
  Clique: 8
  Zero half: 8

Explored 0 nodes (180 simplex iterations) in 0.03 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%