Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:48:43 2012

Optimize a model with 676 rows, 164 columns and 1352 nonzeros
Presolve removed 154 rows and 0 columns
Presolve time: 0.00s
Presolved: 522 rows, 164 columns, 1141 nonzeros
Variable types: 0 continuous, 164 integer (164 binary)
Found heuristic solution: objective 52.0000000

Root relaxation: objective 6.775000e+01, 326 iterations, 0.01 seconds

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

     0     0   67.75000    0  127   52.00000   67.75000  30.3%     -    0s
H    0     0                      53.0000000   67.75000  27.8%     -    0s
     0     0   66.79054    0  158   53.00000   66.79054  26.0%     -    0s
H    0     0                      56.0000000   66.79054  19.3%     -    0s
     0     0   66.00125    0  158   56.00000   66.00125  17.9%     -    0s
     0     0   65.07370    0  160   56.00000   65.07370  16.2%     -    0s
     0     0   64.75229    0  159   56.00000   64.75229  15.6%     -    0s
     0     0   64.62057    0  161   56.00000   64.62057  15.4%     -    0s
     0     0   64.39647    0  159   56.00000   64.39647  15.0%     -    0s
     0     0   64.25272    0  161   56.00000   64.25272  14.7%     -    0s
     0     0   64.13579    0  163   56.00000   64.13579  14.5%     -    0s
     0     0   64.07932    0  160   56.00000   64.07932  14.4%     -    0s
     0     0   64.03323    0  161   56.00000   64.03323  14.3%     -    0s
H    0     0                      57.0000000   64.03323  12.3%     -    0s
     0     0   63.96993    0  160   57.00000   63.96993  12.2%     -    0s
     0     0   63.85618    0  161   57.00000   63.85618  12.0%     -    0s
     0     0   63.78384    0  161   57.00000   63.78384  11.9%     -    0s
     0     0   63.75535    0  160   57.00000   63.75535  11.9%     -    0s
     0     0   63.74825    0  161   57.00000   63.74825  11.8%     -    0s
     0     0   63.74825    0  161   57.00000   63.74825  11.8%     -    0s
     0     2   63.74771    0  161   57.00000   63.74771  11.8%     -    0s
   612   140   60.45914   16  159   57.00000   61.00000  7.02%  40.7    5s
   901   184   59.70077   25  141   57.00000   61.00000  7.02%  47.2   10s

Cutting planes:
  Gomory: 3
  Clique: 1
  Zero half: 198

Explored 1905 nodes (81172 simplex iterations) in 12.40 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.700000000000e+01, best bound 5.700000000000e+01, gap 0.0%