Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:34:10 2012

Optimize a model with 492 rows, 144 columns and 984 nonzeros
Presolve removed 91 rows and 4 columns
Presolve time: 0.00s
Presolved: 401 rows, 140 columns, 848 nonzeros
Variable types: 0 continuous, 140 integer (140 binary)
Found heuristic solution: objective 49.0000000

Root relaxation: objective 6.350000e+01, 204 iterations, 0.00 seconds

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

     0     0   63.50000    0  117   49.00000   63.50000  29.6%     -    0s
     0     0   62.00000    0  125   49.00000   62.00000  26.5%     -    0s
     0     0   61.03704    0  139   49.00000   61.03704  24.6%     -    0s
     0     0   59.85606    0  138   49.00000   59.85606  22.2%     -    0s
H    0     0                      53.0000000   59.85606  12.9%     -    0s
     0     0   59.39690    0  140   53.00000   59.39690  12.1%     -    0s
     0     0   59.07508    0  140   53.00000   59.07508  11.5%     -    0s
     0     0   58.83763    0  138   53.00000   58.83763  11.0%     -    0s
H    0     0                      54.0000000   58.83763  8.96%     -    0s
     0     0   58.67123    0  139   54.00000   58.67123  8.65%     -    0s
     0     0   58.61461    0  139   54.00000   58.61461  8.55%     -    0s
     0     0   58.61461    0  139   54.00000   58.61461  8.55%     -    0s
     0     2   58.61386    0  139   54.00000   58.61386  8.54%     -    0s
H   11     7                      55.0000000   58.60303  6.55%  52.5    0s
*  117     1               7      56.0000000   56.00000   0.0%  36.5    0s

Cutting planes:
  Gomory: 1
  Zero half: 103

Explored 118 nodes (5263 simplex iterations) in 0.24 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.600000000000e+01, best bound 5.600000000000e+01, gap 0.0%