Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:58 2012

Optimize a model with 1247 rows, 72 columns and 2494 nonzeros
Presolve removed 856 rows and 0 columns
Presolve time: 0.03s
Presolved: 391 rows, 72 columns, 2346 nonzeros
Variable types: 0 continuous, 72 integer (72 binary)
Found heuristic solution: objective 6.0000000

Root relaxation: objective 1.158946e+01, 252 iterations, 0.01 seconds

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

     0     0   11.58946    0   69    6.00000   11.58946  93.2%     -    0s
H    0     0                       7.0000000   11.58946  65.6%     -    0s
     0     0   11.42648    0   70    7.00000   11.42648  63.2%     -    0s
     0     0   11.35061    0   72    7.00000   11.35061  62.2%     -    0s
H    0     0                       8.0000000   11.35061  41.9%     -    0s
     0     0   11.31103    0   72    8.00000   11.31103  41.4%     -    0s
     0     0   11.25681    0   70    8.00000   11.25681  40.7%     -    0s
     0     0   11.24299    0   70    8.00000   11.24299  40.5%     -    0s
     0     0   11.21937    0   70    8.00000   11.21937  40.2%     -    0s
     0     0   11.19358    0   70    8.00000   11.19358  39.9%     -    0s
     0     0   11.18141    0   69    8.00000   11.18141  39.8%     -    0s
     0     0   11.17283    0   70    8.00000   11.17283  39.7%     -    0s
     0     0   11.17136    0   71    8.00000   11.17136  39.6%     -    0s
     0     2   11.17023    0   71    8.00000   11.17023  39.6%     -    0s

Cutting planes:
  Clique: 30
  Zero half: 5

Explored 50 nodes (3020 simplex iterations) in 0.40 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%