Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:47 2012

Optimize a model with 276 rows, 77 columns and 552 nonzeros
Presolve removed 86 rows and 3 columns
Presolve time: 0.00s
Presolved: 190 rows, 74 columns, 438 nonzeros
Variable types: 0 continuous, 74 integer (74 binary)
Found heuristic solution: objective 25.0000000

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   54   25.00000   31.00000  24.0%     -    0s
     0     0   30.10256    0   69   25.00000   30.10256  20.4%     -    0s
     0     0   29.70000    0   70   25.00000   29.70000  18.8%     -    0s
     0     0   29.47368    0   70   25.00000   29.47368  17.9%     -    0s
H    0     0                      26.0000000   29.47368  13.4%     -    0s
     0     0   29.00000    0   71   26.00000   29.00000  11.5%     -    0s
     0     0   29.00000    0   69   26.00000   29.00000  11.5%     -    0s
     0     0   29.00000    0   69   26.00000   29.00000  11.5%     -    0s
     0     0   29.00000    0   58   26.00000   29.00000  11.5%     -    0s
H    0     0                      28.0000000   29.00000  3.57%     -    0s
     0     2   29.00000    0   58   28.00000   29.00000  3.57%     -    0s

Explored 3 nodes (502 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%