Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:57 2012

Optimize a model with 384 rows, 89 columns and 768 nonzeros
Presolve removed 129 rows and 0 columns
Presolve time: 0.00s
Presolved: 255 rows, 89 columns, 610 nonzeros
Variable types: 0 continuous, 89 integer (89 binary)
Found heuristic solution: objective 26.0000000

Root relaxation: objective 3.325000e+01, 138 iterations, 0.00 seconds

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

     0     0   33.25000    0   77   26.00000   33.25000  27.9%     -    0s
     0     0   32.31707    0   88   26.00000   32.31707  24.3%     -    0s
     0     0   32.06977    0   87   26.00000   32.06977  23.3%     -    0s
H    0     0                      28.0000000   32.06977  14.5%     -    0s
     0     0   31.78384    0   87   28.00000   31.78384  13.5%     -    0s
     0     0   31.73658    0   88   28.00000   31.73658  13.3%     -    0s
     0     0   31.60000    0   88   28.00000   31.60000  12.9%     -    0s
     0     0   31.53806    0   88   28.00000   31.53806  12.6%     -    0s
     0     0   31.49266    0   89   28.00000   31.49266  12.5%     -    0s
     0     0   31.46725    0   89   28.00000   31.46725  12.4%     -    0s
     0     0   31.46725    0   89   28.00000   31.46725  12.4%     -    0s
     0     2   31.46131    0   89   28.00000   31.46131  12.4%     -    0s

Cutting planes:
  Gomory: 1
  Clique: 2
  Zero half: 41

Explored 125 nodes (2923 simplex iterations) in 0.12 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.800000000000e+01, best bound 2.800000000000e+01, gap 0.0%