Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:28:44 2012 Optimize a model with 5813 rows, 2652 columns and 19837 nonzeros Presolve removed 1328 rows and 2 columns Presolve time: 0.14s Presolved: 4536 rows, 2650 columns, 19151 nonzeros Variable types: 0 continuous, 2650 integer (2650 binary) Found heuristic solution: objective 51.0000000 Root relaxation: objective 3.000000e+00, 4080 iterations, 0.46 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 897 51.00000 3.00000 94.1% - 1s H 0 0 41.0000000 3.00000 92.7% - 1s H 0 0 36.0000000 3.00000 91.7% - 1s 0 0 3.00000 0 1451 36.00000 3.00000 91.7% - 2s H 0 0 4.0000000 3.00000 25.0% - 2s 0 0 3.00000 0 83 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 102 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 104 4.00000 3.00000 25.0% - 6s 0 0 3.00000 0 468 4.00000 3.00000 25.0% - 8s 0 0 3.00000 0 44 4.00000 3.00000 25.0% - 9s 0 2 3.00000 0 44 4.00000 3.00000 25.0% - 11s 4 4 3.00000 1 95 4.00000 3.00000 25.0% 961 15s 7 6 3.00000 1 100 4.00000 3.00000 25.0% 549 21s 8 7 3.00000 1 104 4.00000 3.00000 25.0% 481 25s 12 12 3.00000 13 90 4.00000 3.00000 25.0% 4986 30s 18 10 3.00000 14 191 4.00000 3.00000 25.0% 3712 37s Cutting planes: Gomory: 1 Clique: 2 Zero half: 4 Explored 25 nodes (120486 simplex iterations) in 37.90 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%