Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:34:13 2012

Optimize a model with 537 rows, 145 columns and 1074 nonzeros
Presolve removed 101 rows and 0 columns
Presolve time: 0.00s
Presolved: 436 rows, 145 columns, 934 nonzeros
Variable types: 0 continuous, 145 integer (145 binary)
Found heuristic solution: objective 44.0000000

Root relaxation: objective 6.031579e+01, 299 iterations, 0.00 seconds

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

     0     0   60.31579    0  138   44.00000   60.31579  37.1%     -    0s
H    0     0                      47.0000000   60.31579  28.3%     -    0s
H    0     0                      48.0000000   60.31579  25.7%     -    0s
     0     0   59.44461    0  144   48.00000   59.44461  23.8%     -    0s
     0     0   58.62963    0  143   48.00000   58.62963  22.1%     -    0s
     0     0   57.87801    0  142   48.00000   57.87801  20.6%     -    0s
     0     0   57.27028    0  143   48.00000   57.27028  19.3%     -    0s
     0     0   57.04653    0  142   48.00000   57.04653  18.8%     -    0s
     0     0   56.82596    0  144   48.00000   56.82596  18.4%     -    0s
     0     0   56.73349    0  144   48.00000   56.73349  18.2%     -    0s
     0     0   56.71501    0  144   48.00000   56.71501  18.2%     -    0s
     0     0   56.71501    0  143   48.00000   56.71501  18.2%     -    0s
H    0     0                      51.0000000   56.71501  11.2%     -    0s
     0     2   56.71489    0  143   51.00000   56.71489  11.2%     -    0s

Cutting planes:
  Zero half: 129

Explored 721 nodes (22697 simplex iterations) in 0.89 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.100000000000e+01, best bound 5.100000000000e+01, gap 0.0%