Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:35 2012

Optimize a model with 411 rows, 128 columns and 822 nonzeros
Presolve removed 75 rows and 2 columns
Presolve time: 0.00s
Presolved: 336 rows, 126 columns, 716 nonzeros
Variable types: 0 continuous, 126 integer (126 binary)
Found heuristic solution: objective 44.0000000

Root relaxation: objective 5.550000e+01, 213 iterations, 0.00 seconds

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

     0     0   55.50000    0  101   44.00000   55.50000  26.1%     -    0s
     0     0   54.44000    0  124   44.00000   54.44000  23.7%     -    0s
H    0     0                      45.0000000   54.44000  21.0%     -    0s
     0     0   53.50000    0  118   45.00000   53.50000  18.9%     -    0s
     0     0   53.21053    0  123   45.00000   53.21053  18.2%     -    0s
     0     0   52.51421    0  125   45.00000   52.51421  16.7%     -    0s
     0     0   52.18519    0  122   45.00000   52.18519  16.0%     -    0s
     0     0   52.00047    0  124   45.00000   52.00047  15.6%     -    0s
     0     0   51.84163    0  124   45.00000   51.84163  15.2%     -    0s
     0     0   51.81059    0  124   45.00000   51.81059  15.1%     -    0s
     0     0   51.81059    0  123   45.00000   51.81059  15.1%     -    0s
H    0     0                      47.0000000   51.81059  10.2%     -    0s
     0     2   51.80982    0  123   47.00000   51.80982  10.2%     -    0s
H    8     8                      48.0000000   51.68045  7.67%  41.4    0s
*    9     7               6      49.0000000   51.68045  5.47%  39.7    0s

Cutting planes:
  Zero half: 84

Explored 41 nodes (2023 simplex iterations) in 0.12 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.900000000000e+01, best bound 4.900000000000e+01, gap 0.0%