Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:09 2012

Optimize a model with 274 rows, 100 columns and 548 nonzeros
Presolve removed 60 rows and 6 columns
Presolve time: 0.00s
Presolved: 214 rows, 94 columns, 450 nonzeros
Variable types: 0 continuous, 94 integer (94 binary)
Found heuristic solution: objective 38.0000000

Root relaxation: objective 4.500000e+01, 123 iterations, 0.00 seconds

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

     0     0   45.00000    0   70   38.00000   45.00000  18.4%     -    0s
     0     0   44.20000    0   87   38.00000   44.20000  16.3%     -    0s
H    0     0                      40.0000000   44.20000  10.5%     -    0s
     0     0   43.60000    0   89   40.00000   43.60000  9.00%     -    0s
     0     0   43.30000    0   90   40.00000   43.30000  8.25%     -    0s
     0     0   42.66667    0   84   40.00000   42.66667  6.67%     -    0s
     0     0   42.62500    0   82   40.00000   42.62500  6.56%     -    0s
     0     0   42.50000    0   82   40.00000   42.50000  6.25%     -    0s
     0     0   42.50000    0   88   40.00000   42.50000  6.25%     -    0s
     0     0   42.50000    0   73   40.00000   42.50000  6.25%     -    0s
H    0     0                      41.0000000   42.50000  3.66%     -    0s
     0     2   42.50000    0   62   41.00000   42.50000  3.66%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 14

Explored 14 nodes (656 simplex iterations) in 0.04 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.100000000000e+01, best bound 4.100000000000e+01, gap 0.0%