Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:14 2012

Optimize a model with 310 rows, 110 columns and 620 nonzeros
Presolve removed 86 rows and 12 columns
Presolve time: 0.00s
Presolved: 224 rows, 98 columns, 473 nonzeros
Variable types: 0 continuous, 98 integer (98 binary)
Found heuristic solution: objective 42.0000000

Root relaxation: objective 4.950000e+01, 125 iterations, 0.00 seconds

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

     0     0   49.50000    0   77   42.00000   49.50000  17.9%     -    0s
     0     0   48.72727    0   94   42.00000   48.72727  16.0%     -    0s
H    0     0                      45.0000000   48.72727  8.28%     -    0s
     0     0   47.91176    0   97   45.00000   47.91176  6.47%     -    0s
     0     0   47.44444    0   94   45.00000   47.44444  5.43%     -    0s
     0     0   46.92157    0   96   45.00000   46.92157  4.27%     -    0s
     0     0   46.89796    0   97   45.00000   46.89796  4.22%     -    0s
     0     0   46.89796    0   96   45.00000   46.89796  4.22%     -    0s
     0     2   46.88636    0   96   45.00000   46.88636  4.19%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 31

Explored 21 nodes (744 simplex iterations) in 0.04 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%