Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:13 2012

Optimize a model with 276 rows, 107 columns and 552 nonzeros
Presolve removed 86 rows and 17 columns
Presolve time: 0.00s
Presolved: 190 rows, 90 columns, 401 nonzeros
Variable types: 0 continuous, 90 integer (90 binary)
Found heuristic solution: objective 43.0000000

Root relaxation: objective 4.900000e+01, 124 iterations, 0.00 seconds

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

     0     0   49.00000    0   60   43.00000   49.00000  14.0%     -    0s
H    0     0                      44.0000000   49.00000  11.4%     -    0s
     0     0   48.16667    0   85   44.00000   48.16667  9.47%     -    0s
     0     0   47.50000    0   57   44.00000   47.50000  7.95%     -    0s
     0     0   47.50000    0   59   44.00000   47.50000  7.95%     -    0s
     0     0   47.40000    0   77   44.00000   47.40000  7.73%     -    0s
     0     0   47.00000    0   76   44.00000   47.00000  6.82%     -    0s
     0     0   46.92857    0   81   44.00000   46.92857  6.66%     -    0s
     0     0   46.83333    0   90   44.00000   46.83333  6.44%     -    0s
H    0     0                      45.0000000   46.83333  4.07%     -    0s
     0     0   46.75862    0   85   45.00000   46.75862  3.91%     -    0s
     0     0   46.75138    0   90   45.00000   46.75138  3.89%     -    0s
     0     0   46.75138    0   89   45.00000   46.75138  3.89%     -    0s
     0     2   46.73373    0   89   45.00000   46.73373  3.85%     -    0s

Cutting planes:
  Zero half: 45

Explored 26 nodes (780 simplex iterations) in 0.05 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.500000000000e+01, best bound 4.500000000000e+01, gap 0.0%