Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:22 2012

Optimize a model with 727 rows, 55 columns and 1454 nonzeros
Presolve removed 502 rows and 0 columns
Presolve time: 0.01s
Presolved: 225 rows, 55 columns, 1261 nonzeros
Variable types: 0 continuous, 55 integer (55 binary)
Found heuristic solution: objective 7.0000000

Root relaxation: objective 9.806986e+00, 136 iterations, 0.00 seconds

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

     0     0    9.80699    0   52    7.00000    9.80699  40.1%     -    0s
H    0     0                       8.0000000    9.80699  22.6%     -    0s
     0     0    9.61082    0   52    8.00000    9.61082  20.1%     -    0s
     0     0    9.53542    0   52    8.00000    9.53542  19.2%     -    0s
     0     0    9.51060    0   51    8.00000    9.51060  18.9%     -    0s
     0     0    9.48987    0   52    8.00000    9.48987  18.6%     -    0s
     0     0    9.48980    0   50    8.00000    9.48980  18.6%     -    0s
     0     0    9.47441    0   53    8.00000    9.47441  18.4%     -    0s
     0     0    9.46454    0   54    8.00000    9.46454  18.3%     -    0s
     0     0    9.45183    0   54    8.00000    9.45183  18.1%     -    0s
     0     0    9.44686    0   54    8.00000    9.44686  18.1%     -    0s
     0     0    9.44251    0   54    8.00000    9.44251  18.0%     -    0s
     0     0    9.43291    0   54    8.00000    9.43291  17.9%     -    0s
     0     0    9.43201    0   54    8.00000    9.43201  17.9%     -    0s
     0     2    9.43171    0   54    8.00000    9.43171  17.9%     -    0s

Cutting planes:
  Gomory: 2
  Clique: 16
  Zero half: 9

Explored 7 nodes (619 simplex iterations) in 0.13 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%