Gurobi 5.0.1 (linux64) logging started Wed Nov 28 10:33:48 2012

Optimize a model with 3193 rows, 6160 columns and 18315 nonzeros
Presolve removed 55 rows and 55 columns
Presolve time: 0.12s
Presolved: 3138 rows, 6105 columns, 18205 nonzeros
Variable types: 3025 continuous, 3080 integer (3080 binary)
Found heuristic solution: objective 9937.0000000
Found heuristic solution: objective 4165.0000000
Found heuristic solution: objective 3905.0000000

Root relaxation: objective 1.442333e+03, 5998 iterations, 0.30 seconds

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

     0     0 1442.33333    0   43 3905.00000 1442.33333  63.1%     -    0s
H    0     0                    1727.0000000 1442.33333  16.5%     -    0s
     0     0 1539.88889    0   49 1727.00000 1539.88889  10.8%     -    0s
     0     0 1566.88665    0   79 1727.00000 1566.88665  9.27%     -    1s
     0     0 1583.54630    0   32 1727.00000 1583.54630  8.31%     -    1s
     0     0 1583.55625    0   34 1727.00000 1583.55625  8.31%     -    1s
     0     0 1583.55625    0   43 1727.00000 1583.55625  8.31%     -    1s
     0     0 1583.55625    0   32 1727.00000 1583.55625  8.31%     -    1s
H    0     0                    1694.0000000 1583.55625  6.52%     -    1s
     0     0 1583.55625    0   50 1694.00000 1583.55625  6.52%     -    2s
H    0     0                    1608.0000000 1583.55625  1.52%     -    2s
     0     0 1583.55660    0   29 1608.00000 1583.55660  1.52%     -    2s
     0     2 1584.88648    0   25 1608.00000 1584.88648  1.44%     -    2s

Cutting planes:
  Gomory: 13
  Implied bound: 15
  Flow cover: 70
  Flow path: 11
  Zero half: 2

Explored 41 nodes (19974 simplex iterations) in 2.76 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%