Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:43:51 2012

Optimize a model with 639 rows, 161 columns and 1278 nonzeros
Presolve removed 124 rows and 0 columns
Presolve time: 0.00s
Presolved: 515 rows, 161 columns, 1104 nonzeros
Variable types: 0 continuous, 161 integer (161 binary)
Found heuristic solution: objective 54.0000000

Root relaxation: objective 6.663636e+01, 312 iterations, 0.00 seconds

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

     0     0   66.63636    0  156   54.00000   66.63636  23.4%     -    0s
     0     0   65.33607    0  157   54.00000   65.33607  21.0%     -    0s
H    0     0                      55.0000000   65.33607  18.8%     -    0s
     0     0   64.30677    0  160   55.00000   64.30677  16.9%     -    0s
     0     0   63.91667    0  160   55.00000   63.91667  16.2%     -    0s
     0     0   63.43434    0  158   55.00000   63.43434  15.3%     -    0s
     0     0   63.14560    0  160   55.00000   63.14560  14.8%     -    0s
     0     0   63.01938    0  160   55.00000   63.01938  14.6%     -    0s
     0     0   63.01488    0  160   55.00000   63.01488  14.6%     -    0s
     0     0   63.01488    0  160   55.00000   63.01488  14.6%     -    0s
     0     2   63.01310    0  160   55.00000   63.01310  14.6%     -    0s
H  101    36                      57.0000000   61.78853  8.40%  45.0    0s
H  108    21                      58.0000000   61.72685  6.43%  43.4    0s

Cutting planes:
  Zero half: 103

Explored 293 nodes (13588 simplex iterations) in 0.58 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.800000000000e+01, best bound 5.800000000000e+01, gap 0.0%