Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:38:25 2012

Optimize a model with 595 rows, 155 columns and 1190 nonzeros
Presolve removed 108 rows and 0 columns
Presolve time: 0.00s
Presolved: 487 rows, 155 columns, 1046 nonzeros
Variable types: 0 continuous, 155 integer (155 binary)
Found heuristic solution: objective 51.0000000

Root relaxation: objective 6.400000e+01, 308 iterations, 0.01 seconds

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

     0     0   64.00000    0  124   51.00000   64.00000  25.5%     -    0s
     0     0   63.41509    0  152   51.00000   63.41509  24.3%     -    0s
H    0     0                      53.0000000   63.41509  19.7%     -    0s
     0     0   62.22509    0  154   53.00000   62.22509  17.4%     -    0s
     0     0   61.72727    0  148   53.00000   61.72727  16.5%     -    0s
     0     0   61.39706    0  152   53.00000   61.39706  15.8%     -    0s
     0     0   61.03731    0  153   53.00000   61.03731  15.2%     -    0s
H    0     0                      54.0000000   61.03731  13.0%     -    0s
     0     0   60.87651    0  152   54.00000   60.87651  12.7%     -    0s
     0     0   60.63770    0  153   54.00000   60.63770  12.3%     -    0s
     0     0   60.49758    0  155   54.00000   60.49758  12.0%     -    0s
     0     0   60.47042    0  155   54.00000   60.47042  12.0%     -    0s
     0     0   60.47042    0  155   54.00000   60.47042  12.0%     -    0s
     0     2   60.46434    0  155   54.00000   60.46434  12.0%     -    0s
*   39    14              14      55.0000000   60.05310  9.19%  40.8    0s

Cutting planes:
  Gomory: 2
  Zero half: 146

Explored 621 nodes (25772 simplex iterations) in 1.04 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%