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

Optimize a model with 311 rows, 79 columns and 622 nonzeros
Presolve removed 107 rows and 0 columns
Presolve time: 0.00s
Presolved: 204 rows, 79 columns, 495 nonzeros
Variable types: 0 continuous, 79 integer (79 binary)
Found heuristic solution: objective 26.0000000

Root relaxation: objective 3.071429e+01, 142 iterations, 0.00 seconds

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

     0     0   30.71429    0   77   26.00000   30.71429  18.1%     -    0s
H    0     0                      27.0000000   30.71429  13.8%     -    0s
     0     0   30.34014    0   79   27.00000   30.34014  12.4%     -    0s
     0     0   30.00000    0   77   27.00000   30.00000  11.1%     -    0s
H    0     0                      28.0000000   30.00000  7.14%     -    0s
     0     0   30.00000    0   74   28.00000   30.00000  7.14%     -    0s
H    0     0                      29.0000000   30.00000  3.45%     -    0s
     0     0   30.00000    0   77   29.00000   30.00000  3.45%     -    0s
     0     0   30.00000    0   68   29.00000   30.00000  3.45%     -    0s
     0     2   30.00000    0   68   29.00000   30.00000  3.45%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 4

Explored 1 nodes (476 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%