Gurobi 5.0.1 (linux64) logging started Fri Nov 16 15:43:32 2012 Optimize a model with 10439 rows, 5256 columns and 36214 nonzeros Presolve removed 1586 rows and 2 columns Presolve time: 0.42s Presolved: 8925 rows, 5254 columns, 37480 nonzeros Variable types: 0 continuous, 5254 integer (5254 binary) Found heuristic solution: objective 72.0000000 Root relaxation: objective 3.000000e+00, 7404 iterations, 1.16 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 98 72.00000 3.00000 95.8% - 4s H 0 0 52.0000000 3.00000 94.2% - 4s H 0 0 4.0000000 3.00000 25.0% - 4s 0 0 3.00000 0 148 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 115 4.00000 3.00000 25.0% - 12s 0 0 3.00000 0 109 4.00000 3.00000 25.0% - 15s 0 0 3.00000 0 141 4.00000 3.00000 25.0% - 19s 0 0 3.00000 0 81 4.00000 3.00000 25.0% - 24s 0 0 3.00000 0 75 4.00000 3.00000 25.0% - 26s 0 0 3.00000 0 66 4.00000 3.00000 25.0% - 26s 0 0 3.00000 0 105 4.00000 3.00000 25.0% - 31s 0 0 3.00000 0 104 4.00000 3.00000 25.0% - 34s 0 0 3.00000 0 113 4.00000 3.00000 25.0% - 41s 0 0 3.00000 0 113 4.00000 3.00000 25.0% - 42s 0 2 3.00000 0 113 4.00000 3.00000 25.0% - 46s 4 4 3.00000 1 113 4.00000 3.00000 25.0% 1356 56s 5 5 3.00000 1 77 4.00000 3.00000 25.0% 1085 66s 6 6 3.00000 1 104 4.00000 3.00000 25.0% 904 70s 7 6 3.00000 1 113 4.00000 3.00000 25.0% 775 76s 8 7 3.00000 1 102 4.00000 3.00000 25.0% 678 80s 9 8 3.00000 1 106 4.00000 3.00000 25.0% 603 85s 10 8 3.00000 1 121 4.00000 3.00000 25.0% 542 95s 13 12 3.00000 12 115 4.00000 3.00000 25.0% 13829 108s 14 13 3.00000 12 119 4.00000 3.00000 25.0% 12962 111s 15 14 3.00000 13 110 4.00000 3.00000 25.0% 12121 115s 18 14 3.00000 14 107 4.00000 3.00000 25.0% 10388 122s 20 13 3.00000 15 96 4.00000 3.00000 25.0% 9473 126s 24 14 3.00000 16 1710 4.00000 3.00000 25.0% 8254 207s 26 13 3.00000 17 1665 4.00000 3.00000 25.0% 7788 250s Cutting planes: Gomory: 7 Zero half: 17 Explored 45 nodes (379148 simplex iterations) in 251.50 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%