Gurobi 5.0.1 (linux64) logging started Tue Nov 20 14:41:40 2012

Optimize a model with 898 rows, 191 columns and 1796 nonzeros
Presolve removed 209 rows and 2 columns
Presolve time: 0.01s
Presolved: 689 rows, 189 columns, 1517 nonzeros
Variable types: 0 continuous, 189 integer (189 binary)
Found heuristic solution: objective 57.0000000

Root relaxation: objective 7.550000e+01, 353 iterations, 0.01 seconds

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

     0     0   75.50000    0  141   57.00000   75.50000  32.5%     -    0s
     0     0   74.43068    0  182   57.00000   74.43068  30.6%     -    0s
     0     0   73.75758    0  182   57.00000   73.75758  29.4%     -    0s
     0     0   72.89954    0  189   57.00000   72.89954  27.9%     -    0s
     0     0   72.38793    0  184   57.00000   72.38793  27.0%     -    0s
H    0     0                      58.0000000   72.38793  24.8%     -    0s
     0     0   72.16705    0  188   58.00000   72.16705  24.4%     -    0s
     0     0   71.87320    0  188   58.00000   71.87320  23.9%     -    0s
     0     0   71.71496    0  185   58.00000   71.71496  23.6%     -    0s
     0     0   71.50782    0  187   58.00000   71.50782  23.3%     -    0s
     0     0   71.38509    0  186   58.00000   71.38509  23.1%     -    0s
     0     0   71.28173    0  185   58.00000   71.28173  22.9%     -    0s
     0     0   71.19586    0  183   58.00000   71.19586  22.8%     -    0s
     0     0   71.15129    0  186   58.00000   71.15129  22.7%     -    0s
     0     0   71.11902    0  187   58.00000   71.11902  22.6%     -    0s
     0     0   71.11902    0  187   58.00000   71.11902  22.6%     -    0s
     0     2   71.11445    0  187   58.00000   71.11445  22.6%     -    0s
*   19    17              13      59.0000000   70.96034  20.3%  65.0    0s
*   79    46              15      60.0000000   70.56713  17.6%  56.7    0s
   610   318   67.45575   10  187   60.00000   68.67866  14.5%  48.0    5s
H  952   447                      61.0000000   68.67866  12.6%  57.0    8s
  1678   662   62.27273   30  117   61.00000   68.05973  11.6%  51.0   10s
H 1818   611                      62.0000000   67.91469  9.54%  50.4   10s
  3724  1201   63.45299   21  140   62.00000   66.43750  7.16%  44.8   15s
  6829  1529   63.11111   28  132   62.00000   65.42157  5.52%  40.2   20s
 10130  1254   63.66667   23  136   62.00000   64.61439  4.22%  37.5   25s

Cutting planes:
  Gomory: 2
  Zero half: 88

Explored 13124 nodes (464856 simplex iterations) in 28.07 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.200000000000e+01, best bound 6.200000000000e+01, gap 0.0%