Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:30 2012

Optimize a model with 430 rows, 125 columns and 860 nonzeros
Presolve removed 86 rows and 2 columns
Presolve time: 0.00s
Presolved: 344 rows, 123 columns, 739 nonzeros
Variable types: 0 continuous, 123 integer (123 binary)
Found heuristic solution: objective 42.0000000

Root relaxation: objective 5.257143e+01, 220 iterations, 0.00 seconds

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

     0     0   52.57143    0  120   42.00000   52.57143  25.2%     -    0s
     0     0   51.75758    0  123   42.00000   51.75758  23.2%     -    0s
     0     0   50.31818    0  122   42.00000   50.31818  19.8%     -    0s
     0     0   49.90000    0  121   42.00000   49.90000  18.8%     -    0s
     0     0   49.44643    0  119   42.00000   49.44643  17.7%     -    0s
     0     0   49.34112    0  120   42.00000   49.34112  17.5%     -    0s
H    0     0                      45.0000000   49.34112  9.65%     -    0s
     0     0   49.20833    0  121   45.00000   49.20833  9.35%     -    0s
     0     0   49.03321    0  123   45.00000   49.03321  8.96%     -    0s
     0     0   48.95861    0  123   45.00000   48.95861  8.80%     -    0s
     0     0   48.94841    0  123   45.00000   48.94841  8.77%     -    0s
     0     0   48.94841    0  123   45.00000   48.94841  8.77%     -    0s
     0     2   48.94342    0  122   45.00000   48.94342  8.76%     -    0s
H   31     6                      46.0000000   48.58321  5.62%  36.7    0s

Cutting planes:
  Zero half: 97

Explored 76 nodes (3578 simplex iterations) in 0.17 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.600000000000e+01, best bound 4.600000000000e+01, gap 0.0%