Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:42:37 2012

Optimize a model with 674 rows, 160 columns and 1348 nonzeros
Presolve removed 139 rows and 0 columns
Presolve time: 0.00s
Presolved: 535 rows, 160 columns, 1158 nonzeros
Variable types: 0 continuous, 160 integer (160 binary)
Found heuristic solution: objective 51.0000000

Root relaxation: objective 6.500000e+01, 276 iterations, 0.01 seconds

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

     0     0   65.00000    0  124   51.00000   65.00000  27.5%     -    0s
     0     0   64.38849    0  156   51.00000   64.38849  26.3%     -    0s
H    0     0                      56.0000000   64.38849  15.0%     -    0s
     0     0   63.49123    0  156   56.00000   63.49123  13.4%     -    0s
     0     0   63.05563    0  158   56.00000   63.05563  12.6%     -    0s
     0     0   62.50326    0  158   56.00000   62.50326  11.6%     -    0s
     0     0   62.15333    0  157   56.00000   62.15333  11.0%     -    0s
     0     0   61.96528    0  158   56.00000   61.96528  10.7%     -    0s
     0     0   61.83509    0  156   56.00000   61.83509  10.4%     -    0s
     0     0   61.65553    0  159   56.00000   61.65553  10.1%     -    0s
     0     0   61.51893    0  158   56.00000   61.51893  9.86%     -    0s
     0     0   61.43210    0  157   56.00000   61.43210  9.70%     -    0s
     0     0   61.37077    0  158   56.00000   61.37077  9.59%     -    0s
     0     0   61.35550    0  158   56.00000   61.35550  9.56%     -    0s
     0     0   61.35550    0  157   56.00000   61.35550  9.56%     -    0s
     0     2   61.35151    0  157   56.00000   61.35151  9.56%     -    0s

Cutting planes:
  Zero half: 148

Explored 608 nodes (25810 simplex iterations) in 1.15 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.600000000000e+01, best bound 5.600000000000e+01, gap 0.0%