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

Optimize a model with 401 rows, 125 columns and 802 nonzeros
Presolve removed 79 rows and 5 columns
Presolve time: 0.00s
Presolved: 322 rows, 120 columns, 678 nonzeros
Variable types: 0 continuous, 120 integer (120 binary)
Found heuristic solution: objective 49.0000000

Root relaxation: objective 5.600000e+01, 150 iterations, 0.00 seconds

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

     0     0   56.00000    0  102   49.00000   56.00000  14.3%     -    0s
     0     0   54.33333    0  110   49.00000   54.33333  10.9%     -    0s
     0     0   53.33333    0  112   49.00000   53.33333  8.84%     -    0s
     0     0   52.50000    0  113   49.00000   52.50000  7.14%     -    0s
     0     0   51.97626    0  117   49.00000   51.97626  6.07%     -    0s
     0     0   51.66667    0  108   49.00000   51.66667  5.44%     -    0s
     0     0   51.60000    0  113   49.00000   51.60000  5.31%     -    0s
     0     0   51.50790    0  119   49.00000   51.50790  5.12%     -    0s
     0     0   51.46084    0  118   49.00000   51.46084  5.02%     -    0s
     0     0   51.44429    0  118   49.00000   51.44429  4.99%     -    0s
     0     0   51.44429    0  118   49.00000   51.44429  4.99%     -    0s
H    0     0                      50.0000000   51.44429  2.89%     -    0s
     0     2   51.44308    0  117   50.00000   51.44308  2.89%     -    0s

Cutting planes:
  Zero half: 52

Explored 11 nodes (1096 simplex iterations) in 0.08 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.000000000000e+01, best bound 5.000000000000e+01, gap 0.0%