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

Optimize a model with 498 rows, 144 columns and 996 nonzeros
Presolve removed 100 rows and 4 columns
Presolve time: 0.00s
Presolved: 398 rows, 140 columns, 850 nonzeros
Variable types: 0 continuous, 140 integer (140 binary)
Found heuristic solution: objective 51.0000000

Root relaxation: objective 6.200000e+01, 231 iterations, 0.00 seconds

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

     0     0   62.00000    0  108   51.00000   62.00000  21.6%     -    0s
     0     0   60.86111    0  138   51.00000   60.86111  19.3%     -    0s
     0     0   60.04576    0  139   51.00000   60.04576  17.7%     -    0s
H    0     0                      53.0000000   60.04576  13.3%     -    0s
     0     0   58.73148    0  137   53.00000   58.73148  10.8%     -    0s
     0     0   58.40000    0  133   53.00000   58.40000  10.2%     -    0s
     0     0   58.21308    0  136   53.00000   58.21308  9.84%     -    0s
     0     0   58.10795    0  136   53.00000   58.10795  9.64%     -    0s
     0     0   58.04387    0  136   53.00000   58.04387  9.52%     -    0s
     0     0   57.95122    0  133   53.00000   57.95122  9.34%     -    0s
     0     0   57.94631    0  135   53.00000   57.94631  9.33%     -    0s
     0     0   57.94631    0  135   53.00000   57.94631  9.33%     -    0s
     0     2   57.92673    0  135   53.00000   57.92673  9.30%     -    0s
H   42    13                      54.0000000   57.64356  6.75%  37.2    0s

Cutting planes:
  Zero half: 90

Explored 180 nodes (6579 simplex iterations) in 0.28 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.400000000000e+01, best bound 5.400000000000e+01, gap 0.0%