Gurobi 5.0.1 (linux64) logging started Fri Nov 16 16:40:14 2012 Optimize a model with 13260 rows, 6162 columns and 45630 nonzeros Presolve removed 1404 rows and 0 columns Presolve time: 0.30s Presolved: 11856 rows, 6162 columns, 42276 nonzeros Variable types: 0 continuous, 6162 integer (6162 binary) Found heuristic solution: objective 50.0000000 Root relaxation: objective 3.000000e+00, 12362 iterations, 2.00 seconds Total elapsed time = 6.01s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 96 50.00000 3.00000 94.0% - 6s H 0 0 7.0000000 3.00000 57.1% - 6s H 0 0 5.0000000 3.00000 40.0% - 6s 0 0 3.00000 0 507 5.00000 3.00000 40.0% - 8s H 0 0 4.0000000 3.00000 25.0% - 8s 0 0 3.00000 0 111 4.00000 3.00000 25.0% - 13s 0 0 3.00000 0 157 4.00000 3.00000 25.0% - 20s 0 0 3.00000 0 92 4.00000 3.00000 25.0% - 21s 0 0 3.00000 0 96 4.00000 3.00000 25.0% - 23s 0 0 3.00000 0 121 4.00000 3.00000 25.0% - 28s 0 0 3.00000 0 134 4.00000 3.00000 25.0% - 30s 0 0 3.00000 0 113 4.00000 3.00000 25.0% - 31s 0 2 3.00000 0 113 4.00000 3.00000 25.0% - 34s 2 3 3.00000 1 113 4.00000 3.00000 25.0% 3670 36s 4 4 3.00000 1 153 4.00000 3.00000 25.0% 1835 44s 5 5 3.00000 1 96 4.00000 3.00000 25.0% 1468 45s 7 6 3.00000 1 150 4.00000 3.00000 25.0% 1049 54s 8 7 3.00000 1 132 4.00000 3.00000 25.0% 918 57s 9 8 3.00000 1 137 4.00000 3.00000 25.0% 816 61s 11 9 3.00000 1 219 4.00000 3.00000 25.0% 667 79s 12 10 3.00000 1 137 4.00000 3.00000 25.0% 612 83s 14 11 infeasible 13 4.00000 3.00000 25.0% 13463 88s 15 12 3.00000 13 142 4.00000 3.00000 25.0% 12626 93s 16 12 3.00000 14 133 4.00000 3.00000 25.0% 11876 97s 17 13 3.00000 14 141 4.00000 3.00000 25.0% 11237 101s 18 14 3.00000 15 134 4.00000 3.00000 25.0% 10658 105s 25 10 infeasible 18 4.00000 3.00000 25.0% 8185 111s 30 6 infeasible 16 4.00000 3.00000 25.0% 7356 115s Cutting planes: Gomory: 9 Zero half: 19 Explored 34 nodes (386273 simplex iterations) in 116.80 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%