Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:49 2012

Optimize a model with 301 rows, 80 columns and 602 nonzeros
Presolve removed 106 rows and 1 columns
Presolve time: 0.00s
Presolved: 195 rows, 79 columns, 458 nonzeros
Variable types: 0 continuous, 79 integer (79 binary)
Found heuristic solution: objective 24.0000000

Root relaxation: objective 3.087500e+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   30.87500    0   69   24.00000   30.87500  28.6%     -    0s
H    0     0                      26.0000000   30.87500  18.8%     -    0s
     0     0   30.00000    0   75   26.00000   30.00000  15.4%     -    0s
     0     0   30.00000    0   70   26.00000   30.00000  15.4%     -    0s
     0     0   30.00000    0   76   26.00000   30.00000  15.4%     -    0s
     0     0   30.00000    0   71   26.00000   30.00000  15.4%     -    0s
H    0     0                      27.0000000   30.00000  11.1%     -    0s
H    0     0                      28.0000000   30.00000  7.14%     -    0s
     0     2   30.00000    0   71   28.00000   30.00000  7.14%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 5

Explored 13 nodes (882 simplex iterations) in 0.04 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%