Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:34:29 2012

Optimize a model with 513 rows, 146 columns and 1026 nonzeros
Presolve removed 118 rows and 6 columns
Presolve time: 0.00s
Presolved: 395 rows, 140 columns, 853 nonzeros
Variable types: 0 continuous, 140 integer (140 binary)
Found heuristic solution: objective 46.0000000

Root relaxation: objective 6.155556e+01, 269 iterations, 0.00 seconds

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

     0     0   61.55556    0  130   46.00000   61.55556  33.8%     -    0s
H    0     0                      51.0000000   61.55556  20.7%     -    0s
     0     0   60.00000    0  138   51.00000   60.00000  17.6%     -    0s
     0     0   59.83333    0  136   51.00000   59.83333  17.3%     -    0s
     0     0   59.23404    0  136   51.00000   59.23404  16.1%     -    0s
     0     0   58.31498    0  136   51.00000   58.31498  14.3%     -    0s
     0     0   58.11388    0  137   51.00000   58.11388  13.9%     -    0s
     0     0   57.90164    0  135   51.00000   57.90164  13.5%     -    0s
     0     0   57.78051    0  137   51.00000   57.78051  13.3%     -    0s
     0     0   57.69227    0  136   51.00000   57.69227  13.1%     -    0s
H    0     0                      52.0000000   57.69227  10.9%     -    0s
     0     0   57.56801    0  133   52.00000   57.56801  10.7%     -    0s
     0     0   57.52744    0  136   52.00000   57.52744  10.6%     -    0s
     0     0   57.52744    0  136   52.00000   57.52744  10.6%     -    0s
     0     2   57.52657    0  136   52.00000   57.52657  10.6%     -    0s
   620   114   53.71429    9  135   52.00000   54.85000  5.48%  26.0    5s

Cutting planes:
  Gomory: 2
  Zero half: 128

Explored 1365 nodes (39429 simplex iterations) in 8.71 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.200000000000e+01, best bound 5.200000000000e+01, gap 0.0%