Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:33:28 2012

Optimize a model with 532 rows, 141 columns and 1064 nonzeros
Presolve removed 119 rows and 0 columns
Presolve time: 0.00s
Presolved: 413 rows, 141 columns, 901 nonzeros
Variable types: 0 continuous, 141 integer (141 binary)
Found heuristic solution: objective 43.0000000

Root relaxation: objective 5.800000e+01, 267 iterations, 0.00 seconds

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

     0     0   58.00000    0  110   43.00000   58.00000  34.9%     -    0s
     0     0   56.80000    0  137   43.00000   56.80000  32.1%     -    0s
     0     0   56.12308    0  139   43.00000   56.12308  30.5%     -    0s
H    0     0                      45.0000000   56.12308  24.7%     -    0s
     0     0   55.59892    0  139   45.00000   55.59892  23.6%     -    0s
H    0     0                      47.0000000   55.59892  18.3%     -    0s
     0     0   55.38125    0  140   47.00000   55.38125  17.8%     -    0s
     0     0   55.15835    0  141   47.00000   55.15835  17.4%     -    0s
     0     0   55.12405    0  139   47.00000   55.12405  17.3%     -    0s
     0     0   54.95750    0  139   47.00000   54.95750  16.9%     -    0s
     0     0   54.93221    0  140   47.00000   54.93221  16.9%     -    0s
     0     0   54.93221    0  138   47.00000   54.93221  16.9%     -    0s
     0     2   54.93015    0  138   47.00000   54.93015  16.9%     -    0s
H    7     7                      49.0000000   54.92296  12.1%  51.0    0s
   616    74   51.40000    8  139   49.00000   51.66038  5.43%  33.5    5s
   634    86   51.58861    8  140   49.00000   51.66038  5.43%  32.5   10s

Cutting planes:
  Gomory: 1
  Zero half: 142

Explored 1299 nodes (47469 simplex iterations) in 11.79 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%