Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:51 2012

Optimize a model with 326 rows, 83 columns and 652 nonzeros
Presolve removed 92 rows and 0 columns
Presolve time: 0.00s
Presolved: 234 rows, 83 columns, 537 nonzeros
Variable types: 0 continuous, 83 integer (83 binary)
Found heuristic solution: objective 26.0000000

Root relaxation: objective 3.250000e+01, 145 iterations, 0.00 seconds

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

     0     0   32.50000    0   57   26.00000   32.50000  25.0%     -    0s
     0     0   32.00000    0   73   26.00000   32.00000  23.1%     -    0s
     0     0   31.50000    0   75   26.00000   31.50000  21.2%     -    0s
     0     0   31.50000    0   63   26.00000   31.50000  21.2%     -    0s
     0     0   31.47619    0   80   26.00000   31.47619  21.1%     -    0s
     0     0   31.03636    0   81   26.00000   31.03636  19.4%     -    0s
H    0     0                      27.0000000   31.03636  14.9%     -    0s
     0     0   30.82214    0   81   27.00000   30.82214  14.2%     -    0s
     0     0   30.57995    0   82   27.00000   30.57995  13.3%     -    0s
     0     0   30.53191    0   81   27.00000   30.53191  13.1%     -    0s
     0     0   30.47186    0   82   27.00000   30.47186  12.9%     -    0s
     0     0   30.46166    0   83   27.00000   30.46166  12.8%     -    0s
     0     0   30.46166    0   80   27.00000   30.46166  12.8%     -    0s
H    0     0                      28.0000000   30.46166  8.79%     -    0s
     0     2   30.45961    0   80   28.00000   30.45961  8.78%     -    0s

Cutting planes:
  Gomory: 1
  Clique: 2
  Zero half: 43

Explored 36 nodes (1427 simplex iterations) in 0.07 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%