Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:58:25 2012

Optimize a model with 721 rows, 169 columns and 1442 nonzeros
Presolve removed 175 rows and 2 columns
Presolve time: 0.00s
Presolved: 546 rows, 167 columns, 1202 nonzeros
Variable types: 0 continuous, 167 integer (167 binary)
Found heuristic solution: objective 55.0000000

Root relaxation: objective 6.783333e+01, 363 iterations, 0.01 seconds

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

     0     0   67.83333    0  163   55.00000   67.83333  23.3%     -    0s
     0     0   66.85895    0  160   55.00000   66.85895  21.6%     -    0s
H    0     0                      59.0000000   66.85895  13.3%     -    0s
     0     0   66.30230    0  163   59.00000   66.30230  12.4%     -    0s
     0     0   66.04370    0  159   59.00000   66.04370  11.9%     -    0s
H    0     0                      60.0000000   66.04370  10.1%     -    0s
     0     0   65.63575    0  165   60.00000   65.63575  9.39%     -    0s
     0     0   65.26656    0  162   60.00000   65.26656  8.78%     -    0s
     0     0   65.13155    0  166   60.00000   65.13155  8.55%     -    0s
     0     0   65.04530    0  167   60.00000   65.04530  8.41%     -    0s
     0     0   64.96017    0  164   60.00000   64.96017  8.27%     -    0s
     0     0   64.94932    0  165   60.00000   64.94932  8.25%     -    0s
     0     0   64.94932    0  163   60.00000   64.94932  8.25%     -    0s
     0     2   64.94585    0  163   60.00000   64.94585  8.24%     -    0s
*  158    18               5      61.0000000   63.53349  4.15%  47.4    0s

Cutting planes:
  Zero half: 84

Explored 218 nodes (10639 simplex iterations) in 0.52 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.100000000000e+01, best bound 6.100000000000e+01, gap 0.0%