Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:33:42 2012

Optimize a model with 542 rows, 142 columns and 1084 nonzeros
Presolve removed 118 rows and 0 columns
Presolve time: 0.00s
Presolved: 424 rows, 142 columns, 926 nonzeros
Variable types: 0 continuous, 142 integer (142 binary)
Found heuristic solution: objective 43.0000000

Root relaxation: objective 5.900000e+01, 235 iterations, 0.00 seconds

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

     0     0   59.00000    0  116   43.00000   59.00000  37.2%     -    0s
     0     0   57.47143    0  137   43.00000   57.47143  33.7%     -    0s
H    0     0                      45.0000000   57.47143  27.7%     -    0s
     0     0   56.52086    0  141   45.00000   56.52086  25.6%     -    0s
     0     0   55.63838    0  140   45.00000   55.63838  23.6%     -    0s
H    0     0                      48.0000000   55.63838  15.9%     -    0s
     0     0   55.23876    0  140   48.00000   55.23876  15.1%     -    0s
     0     0   54.69003    0  139   48.00000   54.69003  13.9%     -    0s
     0     0   54.54125    0  139   48.00000   54.54125  13.6%     -    0s
     0     0   54.43371    0  140   48.00000   54.43371  13.4%     -    0s
     0     0   54.34873    0  140   48.00000   54.34873  13.2%     -    0s
     0     0   54.34254    0  140   48.00000   54.34254  13.2%     -    0s
     0     0   54.34254    0  138   48.00000   54.34254  13.2%     -    0s
     0     2   54.33899    0  138   48.00000   54.33899  13.2%     -    0s
*   10     6               7      49.0000000   54.20308  10.6%  51.8    0s

Cutting planes:
  Zero half: 153

Explored 735 nodes (25939 simplex iterations) in 1.00 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.900000000000e+01, best bound 4.900000000000e+01, gap 0.0%