Gurobi 5.0.1 (linux64) logging started Fri Nov 16 17:02:20 2012 Optimize a model with 14499 rows, 6642 columns and 49815 nonzeros Presolve removed 2026 rows and 81 columns Presolve time: 0.34s Presolved: 12473 rows, 6561 columns, 45036 nonzeros Variable types: 0 continuous, 6561 integer (6561 binary) Found heuristic solution: objective 52.0000000 Root relaxation: objective 3.000000e+00, 14746 iterations, 3.66 seconds Total elapsed time = 7.53s Total elapsed time = 12.07s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 58 52.00000 3.00000 94.2% - 14s H 0 0 4.0000000 3.00000 25.0% - 14s 0 0 3.00000 0 182 4.00000 3.00000 25.0% - 15s 0 0 3.00000 0 165 4.00000 3.00000 25.0% - 22s 0 0 3.00000 0 228 4.00000 3.00000 25.0% - 33s 0 0 3.00000 0 219 4.00000 3.00000 25.0% - 45s 0 0 3.00000 0 226 4.00000 3.00000 25.0% - 55s 0 0 3.00000 0 231 4.00000 3.00000 25.0% - 63s 0 0 3.00000 0 231 4.00000 3.00000 25.0% - 66s 0 2 3.00000 0 231 4.00000 3.00000 25.0% - 74s 2 3 3.00000 1 231 4.00000 3.00000 25.0% 3255 76s 4 4 3.00000 1 115 4.00000 3.00000 25.0% 1628 84s 5 5 3.00000 1 88 4.00000 3.00000 25.0% 1302 86s 7 6 3.00000 1 136 4.00000 3.00000 25.0% 930 93s 8 7 3.00000 1 144 4.00000 3.00000 25.0% 814 100s 9 8 3.00000 1 179 4.00000 3.00000 25.0% 723 118s 10 8 3.00000 1 179 4.00000 3.00000 25.0% 651 121s 13 10 3.00000 16 139 4.00000 3.00000 25.0% 13643 127s 16 8 infeasible 18 4.00000 3.00000 25.0% 11541 131s Cutting planes: Gomory: 2 Zero half: 4 Explored 18 nodes (401136 simplex iterations) in 131.32 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%