Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:45 2012

Optimize a model with 248 rows, 74 columns and 496 nonzeros
Presolve removed 80 rows and 4 columns
Presolve time: 0.00s
Presolved: 168 rows, 70 columns, 376 nonzeros
Variable types: 0 continuous, 70 integer (70 binary)
Found heuristic solution: objective 26.0000000

Root relaxation: objective 3.100000e+01, 105 iterations, 0.00 seconds

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

     0     0   31.00000    0   52   26.00000   31.00000  19.2%     -    0s
H    0     0                      28.0000000   31.00000  10.7%     -    0s
     0     0   30.70213    0   68   28.00000   30.70213  9.65%     -    0s
     0     0   30.16667    0   67   28.00000   30.16667  7.74%     -    0s
     0     0   30.00000    0   63   28.00000   30.00000  7.14%     -    0s
     0     0   29.94020    0   69   28.00000   29.94020  6.93%     -    0s
     0     0   29.92105    0   69   28.00000   29.92105  6.86%     -    0s
H    0     0                      29.0000000   29.92105  3.18%     -    0s

Cutting planes:
  Zero half: 18

Explored 0 nodes (279 simplex iterations) in 0.02 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%