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

Optimize a model with 301 rows, 79 columns and 602 nonzeros
Presolve removed 112 rows and 7 columns
Presolve time: 0.00s
Presolved: 189 rows, 72 columns, 439 nonzeros
Variable types: 0 continuous, 72 integer (72 binary)
Found heuristic solution: objective 26.0000000

Root relaxation: objective 3.130952e+01, 122 iterations, 0.00 seconds

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

     0     0   31.30952    0   60   26.00000   31.30952  20.4%     -    0s
H    0     0                      29.0000000   31.30952  7.96%     -    0s
     0     0   30.89655    0   60   29.00000   30.89655  6.54%     -    0s
     0     0   30.81667    0   68   29.00000   30.81667  6.26%     -    0s
     0     0   30.50000    0   65   29.00000   30.50000  5.17%     -    0s
     0     0   30.00000    0   60   29.00000   30.00000  3.45%     -    0s
     0     0   30.00000    0   63   29.00000   30.00000  3.45%     -    0s
     0     0   30.00000    0   58   29.00000   30.00000  3.45%     -    0s
     0     0   30.00000    0   58   29.00000   30.00000  3.45%     -    0s
     0     0   30.00000    0   58   29.00000   30.00000  3.45%     -    0s
     0     2   30.00000    0   58   29.00000   30.00000  3.45%     -    0s

Cutting planes:
  Zero half: 16

Explored 1 nodes (537 simplex iterations) in 0.05 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%