Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:37:59 2012

Optimize a model with 590 rows, 154 columns and 1180 nonzeros
Presolve removed 133 rows and 4 columns
Presolve time: 0.00s
Presolved: 457 rows, 150 columns, 991 nonzeros
Variable types: 0 continuous, 150 integer (150 binary)
Found heuristic solution: objective 52.0000000

Root relaxation: objective 6.500000e+01, 227 iterations, 0.00 seconds

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

     0     0   65.00000    0  120   52.00000   65.00000  25.0%     -    0s
     0     0   63.76158    0  148   52.00000   63.76158  22.6%     -    0s
H    0     0                      54.0000000   63.76158  18.1%     -    0s
     0     0   62.68045    0  147   54.00000   62.68045  16.1%     -    0s
     0     0   62.10494    0  150   54.00000   62.10494  15.0%     -    0s
     0     0   61.46890    0  150   54.00000   61.46890  13.8%     -    0s
     0     0   61.31921    0  149   54.00000   61.31921  13.6%     -    0s
     0     0   61.03614    0  148   54.00000   61.03614  13.0%     -    0s
     0     0   60.94097    0  148   54.00000   60.94097  12.9%     -    0s
H    0     0                      56.0000000   60.94097  8.82%     -    0s
     0     0   60.92098    0  149   56.00000   60.92098  8.79%     -    0s
     0     0   60.92098    0  148   56.00000   60.92098  8.79%     -    0s
     0     2   60.92098    0  148   56.00000   60.92098  8.79%     -    0s

Cutting planes:
  Zero half: 124

Explored 338 nodes (14099 simplex iterations) in 0.58 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%