Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:58:00 2012

Optimize a model with 876 rows, 185 columns and 1752 nonzeros
Presolve removed 215 rows and 0 columns
Presolve time: 0.01s
Presolved: 661 rows, 185 columns, 1468 nonzeros
Variable types: 0 continuous, 185 integer (185 binary)
Found heuristic solution: objective 49.0000000

Root relaxation: objective 7.180000e+01, 432 iterations, 0.01 seconds

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

     0     0   71.80000    0  180   49.00000   71.80000  46.5%     -    0s
H    0     0                      53.0000000   71.80000  35.5%     -    0s
     0     0   70.71685    0  182   53.00000   70.71685  33.4%     -    0s
     0     0   69.96491    0  182   53.00000   69.96491  32.0%     -    0s
     0     0   69.23495    0  180   53.00000   69.23495  30.6%     -    0s
     0     0   68.82074    0  180   53.00000   68.82074  29.9%     -    0s
     0     0   68.57264    0  181   53.00000   68.57264  29.4%     -    0s
     0     0   68.32623    0  180   53.00000   68.32623  28.9%     -    0s
     0     0   68.21866    0  182   53.00000   68.21866  28.7%     -    0s
     0     0   68.16776    0  182   53.00000   68.16776  28.6%     -    0s
H    0     0                      54.0000000   68.16776  26.2%     -    0s
     0     0   68.09671    0  183   54.00000   68.09671  26.1%     -    0s
H    0     0                      56.0000000   68.09671  21.6%     -    0s
     0     0   68.04285    0  181   56.00000   68.04285  21.5%     -    0s
     0     0   67.98165    0  184   56.00000   67.98165  21.4%     -    0s
     0     0   67.89620    0  183   56.00000   67.89620  21.2%     -    0s
     0     0   67.86724    0  184   56.00000   67.86724  21.2%     -    0s
     0     0   67.86724    0  182   56.00000   67.86724  21.2%     -    0s
     0     2   67.86724    0  182   56.00000   67.86724  21.2%     -    0s
H   97    52                      58.0000000   67.36697  16.1%  62.5    0s
   612   292   61.17073    9  182   58.00000   65.27778  12.5%  49.1    5s
   964   429   65.27778   20  157   58.00000   65.27778  12.5%  54.7   10s
  3456  1503   60.08333   29  120   58.00000   63.50000  9.48%  42.8   15s
* 5069  1679              27      59.0000000   63.00000  6.78%  39.4   17s
  6972  1830   60.39024   33  122   59.00000   62.33333  5.65%  37.1   20s
 10917  1313     cutoff   33        59.00000   61.22727  3.78%  34.4   25s

Cutting planes:
  Gomory: 1
  Zero half: 86
  Mod-K: 1

Explored 13234 nodes (431891 simplex iterations) in 26.87 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.900000000000e+01, best bound 5.900000000000e+01, gap 0.0%