Gurobi 5.0.1 (linux64) logging started Fri Nov 16 16:27:15 2012 Optimize a model with 13937 rows, 6006 columns and 47509 nonzeros Presolve removed 2156 rows and 0 columns Presolve time: 0.29s Presolved: 11781 rows, 6006 columns, 42273 nonzeros Variable types: 0 continuous, 6006 integer (6006 binary) Found heuristic solution: objective 39.0000000 Root relaxation: objective 3.000000e+00, 12406 iterations, 2.16 seconds Total elapsed time = 6.48s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 137 39.00000 3.00000 92.3% - 7s H 0 0 5.0000000 3.00000 40.0% - 7s 0 0 3.00000 0 292 5.00000 3.00000 40.0% - 9s H 0 0 4.0000000 3.00000 25.0% - 9s 0 0 3.00000 0 78 4.00000 3.00000 25.0% - 18s 0 0 3.00000 0 159 4.00000 3.00000 25.0% - 26s 0 0 3.00000 0 227 4.00000 3.00000 25.0% - 32s 0 0 3.00000 0 219 4.00000 3.00000 25.0% - 43s 0 0 3.00000 0 241 4.00000 3.00000 25.0% - 53s 0 0 3.00000 0 239 4.00000 3.00000 25.0% - 66s 0 0 3.00000 0 243 4.00000 3.00000 25.0% - 74s 0 0 3.00000 0 226 4.00000 3.00000 25.0% - 81s 0 2 3.00000 0 226 4.00000 3.00000 25.0% - 90s 4 4 3.00000 1 151 4.00000 3.00000 25.0% 2462 106s 5 5 3.00000 1 143 4.00000 3.00000 25.0% 1970 113s 6 6 3.00000 1 155 4.00000 3.00000 25.0% 1641 123s 7 6 3.00000 1 144 4.00000 3.00000 25.0% 1407 137s 8 7 3.00000 1 224 4.00000 3.00000 25.0% 1231 149s 9 8 3.00000 1 214 4.00000 3.00000 25.0% 1094 166s 10 8 3.00000 1 229 4.00000 3.00000 25.0% 985 174s 11 9 3.00000 1 227 4.00000 3.00000 25.0% 895 184s 12 10 3.00000 1 240 4.00000 3.00000 25.0% 821 201s 13 10 3.00000 1 240 4.00000 3.00000 25.0% 758 208s 15 12 infeasible 14 4.00000 3.00000 25.0% 20329 226s 16 12 3.00000 14 136 4.00000 3.00000 25.0% 19196 232s 18 12 3.00000 15 158 4.00000 3.00000 25.0% 17104 237s 20 11 3.00000 16 112 4.00000 3.00000 25.0% 15536 241s 22 10 3.00000 17 147 4.00000 3.00000 25.0% 14239 246s 26 9 3.00000 19 126 4.00000 3.00000 25.0% 12270 250s Cutting planes: Zero half: 9 Explored 29 nodes (586098 simplex iterations) in 251.67 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%