Gurobi 5.0.1 (linux64) logging started Fri Nov 16 02:27:04 2012 Optimize a model with 8810 rows, 1122 columns and 27388 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.10s Presolved: 8808 rows, 1120 columns, 29176 nonzeros Variable types: 0 continuous, 1120 integer (1120 binary) Found heuristic solution: objective 32.0000000 Root relaxation: objective 3.455399e+00, 7658 iterations, 0.58 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.45540 0 989 32.00000 3.45540 89.2% - 1s 0 0 4.02778 0 173 32.00000 4.02778 87.4% - 2s H 0 0 9.0000000 4.02778 55.2% - 2s 0 0 4.99605 0 460 9.00000 4.99605 44.5% - 3s H 0 0 8.0000000 4.99605 37.5% - 3s 0 0 5.00000 0 348 8.00000 5.00000 37.5% - 3s 0 0 5.16667 0 700 8.00000 5.16667 35.4% - 3s 0 0 5.16667 0 718 8.00000 5.16667 35.4% - 3s 0 0 5.16667 0 627 8.00000 5.16667 35.4% - 5s 0 0 5.16667 0 622 8.00000 5.16667 35.4% - 6s 0 0 5.16667 0 661 8.00000 5.16667 35.4% - 8s 0 0 5.16667 0 661 8.00000 5.16667 35.4% - 8s 0 1 6.00000 0 661 8.00000 6.00000 25.0% - 11s * 26 12 22 7.0000000 6.00000 14.3% 408 13s Cutting planes: Gomory: 26 Clique: 101 Zero half: 1 Explored 36 nodes (50153 simplex iterations) in 13.58 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.000000000000e+00, best bound 7.000000000000e+00, gap 0.0%