Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:34:50 2012

Optimize a model with 517 rows, 147 columns and 1034 nonzeros
Presolve removed 97 rows and 0 columns
Presolve time: 0.00s
Presolved: 420 rows, 147 columns, 899 nonzeros
Variable types: 0 continuous, 147 integer (147 binary)
Found heuristic solution: objective 49.0000000

Root relaxation: objective 6.169231e+01, 259 iterations, 0.00 seconds

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

     0     0   61.69231    0  137   49.00000   61.69231  25.9%     -    0s
H    0     0                      53.0000000   61.69231  16.4%     -    0s
     0     0   60.69983    0  141   53.00000   60.69983  14.5%     -    0s
     0     0   59.52830    0  138   53.00000   59.52830  12.3%     -    0s
     0     0   58.85622    0  143   53.00000   58.85622  11.0%     -    0s
     0     0   58.41405    0  144   53.00000   58.41405  10.2%     -    0s
     0     0   58.21739    0  142   53.00000   58.21739  9.84%     -    0s
     0     0   58.17033    0  145   53.00000   58.17033  9.76%     -    0s
     0     0   58.09335    0  144   53.00000   58.09335  9.61%     -    0s
     0     0   57.97706    0  146   53.00000   57.97706  9.39%     -    0s
     0     0   57.94331    0  146   53.00000   57.94331  9.33%     -    0s
     0     0   57.94331    0  144   53.00000   57.94331  9.33%     -    0s
H    0     0                      54.0000000   57.94331  7.30%     -    0s
     0     2   57.94041    0  144   54.00000   57.94041  7.30%     -    0s
*   23     8               7      55.0000000   57.69697  4.90%  37.1    0s

Cutting planes:
  Zero half: 104

Explored 58 nodes (3280 simplex iterations) in 0.19 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.500000000000e+01, best bound 5.500000000000e+01, gap 0.0%