Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:58 2012

Optimize a model with 416 rows, 90 columns and 832 nonzeros
Presolve removed 136 rows and 0 columns
Presolve time: 0.00s
Presolved: 280 rows, 90 columns, 669 nonzeros
Variable types: 0 continuous, 90 integer (90 binary)
Found heuristic solution: objective 27.0000000

Root relaxation: objective 3.350000e+01, 153 iterations, 0.00 seconds

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

     0     0   33.50000    0   61   27.00000   33.50000  24.1%     -    0s
     0     0   32.90584    0   86   27.00000   32.90584  21.9%     -    0s
H    0     0                      28.0000000   32.90584  17.5%     -    0s
     0     0   32.66204    0   86   28.00000   32.66204  16.7%     -    0s
H    0     0                      29.0000000   32.66204  12.6%     -    0s
     0     0   32.17500    0   86   29.00000   32.17500  10.9%     -    0s
     0     0   32.02934    0   88   29.00000   32.02934  10.4%     -    0s
     0     0   31.82588    0   87   29.00000   31.82588  9.74%     -    0s
     0     0   31.68444    0   90   29.00000   31.68444  9.26%     -    0s
     0     0   31.60586    0   90   29.00000   31.60586  8.99%     -    0s
     0     0   31.56116    0   89   29.00000   31.56116  8.83%     -    0s
     0     0   31.55871    0   90   29.00000   31.55871  8.82%     -    0s
     0     0   31.55871    0   89   29.00000   31.55871  8.82%     -    0s
     0     2   31.54339    0   89   29.00000   31.54339  8.77%     -    0s

Cutting planes:
  Zero half: 41

Explored 28 nodes (1533 simplex iterations) in 0.09 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.900000000000e+01, best bound 2.900000000000e+01, gap 0.0%