Gurobi 5.0.1 (linux64) logging started Fri Nov 16 05:31:53 2012 Optimize a model with 7644 rows, 3080 columns and 25738 nonzeros Presolve removed 1102 rows and 2 columns Presolve time: 0.22s Presolved: 6542 rows, 3078 columns, 22805 nonzeros Variable types: 0 continuous, 3078 integer (3078 binary) Found heuristic solution: objective 55.0000000 Root relaxation: objective 3.000000e+00, 4623 iterations, 0.50 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 795 55.00000 3.00000 94.5% - 2s H 0 0 51.0000000 3.00000 94.1% - 2s H 0 0 4.0000000 3.00000 25.0% - 2s 0 0 3.00000 0 560 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 1325 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 66 4.00000 3.00000 25.0% - 8s 0 0 3.00000 0 66 4.00000 3.00000 25.0% - 11s 0 0 3.00000 0 74 4.00000 3.00000 25.0% - 12s 0 0 3.00000 0 76 4.00000 3.00000 25.0% - 14s 0 0 3.00000 0 76 4.00000 3.00000 25.0% - 14s 0 2 3.00000 0 76 4.00000 3.00000 25.0% - 17s 4 4 3.00000 1 252 4.00000 3.00000 25.0% 1628 26s 6 6 3.00000 1 86 4.00000 3.00000 25.0% 1085 31s 8 7 3.00000 1 117 4.00000 3.00000 25.0% 814 36s 10 8 3.00000 1 70 4.00000 3.00000 25.0% 651 40s 13 10 3.00000 1 117 4.00000 3.00000 25.0% 501 46s 14 11 3.00000 1 119 4.00000 3.00000 25.0% 465 54s 15 12 3.00000 1 119 4.00000 3.00000 25.0% 434 55s 17 15 3.00000 11 124 4.00000 3.00000 25.0% 9341 61s 18 16 3.00000 11 562 4.00000 3.00000 25.0% 8963 81s 24 14 infeasible 14 4.00000 3.00000 25.0% 7131 85s 35 11 3.00000 13 114 4.00000 3.00000 25.0% 5219 90s Cutting planes: Gomory: 13 Zero half: 33 Explored 47 nodes (263501 simplex iterations) in 94.01 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%