Gurobi 5.0.1 (linux64) logging started Wed Nov 28 10:33:38 2012

Optimize a model with 3247 rows, 3136 columns and 18590 nonzeros
Presolve removed 55 rows and 1 columns
Presolve time: 0.13s
Presolved: 3192 rows, 3135 columns, 18370 nonzeros
Variable types: 55 continuous, 3080 integer (3080 binary)
Found heuristic solution: objective 1795.0000000

Root relaxation: objective 1.510733e+03, 327 iterations, 0.01 seconds

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

     0     0 1510.73333    0   55 1795.00000 1510.73333  15.8%     -    0s
     0     0 1545.63761    0   59 1795.00000 1545.63761  13.9%     -    0s
     0     0 1547.62852    0   60 1795.00000 1547.62852  13.8%     -    0s
     0     0 1560.31231    0   77 1795.00000 1560.31231  13.1%     -    0s
     0     0 1561.88761    0   72 1795.00000 1561.88761  13.0%     -    0s
     0     0 1561.88761    0   74 1795.00000 1561.88761  13.0%     -    0s
     0     0 1561.88761    0   76 1795.00000 1561.88761  13.0%     -    0s
     0     0 1563.14103    0   74 1795.00000 1563.14103  12.9%     -    0s
     0     0 1563.14103    0   76 1795.00000 1563.14103  12.9%     -    0s
     0     0 1563.14103    0   72 1795.00000 1563.14103  12.9%     -    0s
     0     0 1563.14103    0   72 1795.00000 1563.14103  12.9%     -    0s
     0     0 1563.14103    0   72 1795.00000 1563.14103  12.9%     -    1s
H    0     0                    1694.0000000 1563.14103  7.72%     -    1s
H    0     0                    1620.0000000 1563.14103  3.51%     -    1s
     0     0 1563.14103    0   55 1620.00000 1563.14103  3.51%     -    1s
     0     0 1563.14103    0   76 1620.00000 1563.14103  3.51%     -    1s
     0     0 1563.27618    0   80 1620.00000 1563.27618  3.50%     -    1s
     0     0 1563.27618    0   80 1620.00000 1563.27618  3.50%     -    1s
     0     0 1563.27618    0   73 1620.00000 1563.27618  3.50%     -    1s
H    0     0                    1618.0000000 1563.27618  3.38%     -    1s
     0     2 1563.35606    0   73 1618.00000 1563.35606  3.38%     -    1s
H   81    34                    1608.0000000 1573.01601  2.18%  11.7    1s
  2093   378 1598.36580   36   19 1608.00000 1591.51923  1.02%  11.6    5s
  7523   251     cutoff   44      1608.00000 1601.70738  0.39%  11.6   10s

Cutting planes:
  Gomory: 7
  MIR: 7
  Zero half: 1

Explored 7978 nodes (92958 simplex iterations) in 10.34 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.608000000000e+03, best bound 1.608000000000e+03, gap 0.0%