Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:00 2012

Optimize a model with 419 rows, 91 columns and 838 nonzeros
Presolve removed 153 rows and 0 columns
Presolve time: 0.00s
Presolved: 266 rows, 91 columns, 652 nonzeros
Variable types: 0 continuous, 91 integer (91 binary)
Found heuristic solution: objective 26.0000000

Root relaxation: objective 3.350000e+01, 177 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   63   26.00000   33.50000  28.8%     -    0s
     0     0   32.95161    0   89   26.00000   32.95161  26.7%     -    0s
     0     0   32.38389    0   85   26.00000   32.38389  24.6%     -    0s
     0     0   32.03212    0   83   26.00000   32.03212  23.2%     -    0s
     0     0   31.93672    0   88   26.00000   31.93672  22.8%     -    0s
H    0     0                      28.0000000   31.93672  14.1%     -    0s
     0     0   31.84783    0   86   28.00000   31.84783  13.7%     -    0s
     0     0   31.77796    0   90   28.00000   31.77796  13.5%     -    0s
     0     0   31.66842    0   87   28.00000   31.66842  13.1%     -    0s
     0     0   31.62497    0   88   28.00000   31.62497  12.9%     -    0s
     0     0   31.60953    0   87   28.00000   31.60953  12.9%     -    0s
     0     0   31.60660    0   87   28.00000   31.60660  12.9%     -    0s
     0     0   31.60660    0   87   28.00000   31.60660  12.9%     -    0s
     0     2   31.59818    0   87   28.00000   31.59818  12.9%     -    0s

Cutting planes:
  Clique: 3
  Zero half: 53

Explored 111 nodes (3147 simplex iterations) in 0.13 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%