Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:17 2012

Optimize a model with 508 rows, 100 columns and 1016 nonzeros
Presolve removed 184 rows and 0 columns
Presolve time: 0.00s
Presolved: 324 rows, 100 columns, 815 nonzeros
Variable types: 0 continuous, 100 integer (100 binary)
Found heuristic solution: objective 28.0000000

Root relaxation: objective 3.557377e+01, 240 iterations, 0.00 seconds

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

     0     0   35.57377    0   94   28.00000   35.57377  27.0%     -    0s
H    0     0                      29.0000000   35.57377  22.7%     -    0s
     0     0   34.98645    0   93   29.00000   34.98645  20.6%     -    0s
     0     0   34.72230    0   95   29.00000   34.72230  19.7%     -    0s
     0     0   34.43222    0   96   29.00000   34.43222  18.7%     -    0s
     0     0   34.25000    0   87   29.00000   34.25000  18.1%     -    0s
     0     0   34.04556    0   97   29.00000   34.04556  17.4%     -    0s
     0     0   33.97260    0   99   29.00000   33.97260  17.1%     -    0s
     0     0   33.84645    0   99   29.00000   33.84645  16.7%     -    0s
     0     0   33.80250    0   99   29.00000   33.80250  16.6%     -    0s
     0     0   33.76149    0   98   29.00000   33.76149  16.4%     -    0s
     0     0   33.74886    0   98   29.00000   33.74886  16.4%     -    0s
     0     0   33.74886    0   97   29.00000   33.74886  16.4%     -    0s
     0     2   33.74810    0   97   29.00000   33.74810  16.4%     -    0s
H    7     7                      30.0000000   33.74810  12.5%  35.3    0s
*   84     5               3      31.0000000   32.52891  4.93%  25.2    0s

Cutting planes:
  Gomory: 1
  Clique: 5
  Zero half: 41

Explored 102 nodes (3255 simplex iterations) in 0.17 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%