Gurobi 5.0.1 (linux64) logging started Fri Nov 16 17:17:30 2012 Optimize a model with 15088 rows, 6806 columns and 51742 nonzeros Presolve removed 1887 rows and 82 columns Presolve time: 0.36s Presolved: 13201 rows, 6724 columns, 47150 nonzeros Variable types: 0 continuous, 6724 integer (6724 binary) Found heuristic solution: objective 47.0000000 Root relaxation: objective 3.000000e+00, 12754 iterations, 2.37 seconds Total elapsed time = 5.51s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 127 47.00000 3.00000 93.6% - 8s H 0 0 4.0000000 3.00000 25.0% - 8s 0 0 3.00000 0 108 4.00000 3.00000 25.0% - 9s 0 0 3.00000 0 155 4.00000 3.00000 25.0% - 10s 0 0 3.00000 0 96 4.00000 3.00000 25.0% - 17s 0 0 3.00000 0 126 4.00000 3.00000 25.0% - 18s 0 0 3.00000 0 90 4.00000 3.00000 25.0% - 22s 0 0 3.00000 0 105 4.00000 3.00000 25.0% - 25s 0 0 3.00000 0 98 4.00000 3.00000 25.0% - 27s 0 0 3.00000 0 128 4.00000 3.00000 25.0% - 33s 0 0 3.00000 0 126 4.00000 3.00000 25.0% - 35s 0 0 3.00000 0 124 4.00000 3.00000 25.0% - 37s 0 0 3.00000 0 84 4.00000 3.00000 25.0% - 39s 0 0 3.00000 0 81 4.00000 3.00000 25.0% - 42s 0 0 3.00000 0 96 4.00000 3.00000 25.0% - 44s 0 0 3.00000 0 81 4.00000 3.00000 25.0% - 56s 0 0 3.00000 0 120 4.00000 3.00000 25.0% - 65s 0 0 3.00000 0 86 4.00000 3.00000 25.0% - 70s 0 2 3.00000 0 86 4.00000 3.00000 25.0% - 72s 4 4 3.00000 1 116 4.00000 3.00000 25.0% 1357 84s 5 5 3.00000 1 176 4.00000 3.00000 25.0% 1086 94s 6 6 3.00000 1 136 4.00000 3.00000 25.0% 905 99s 7 6 3.00000 1 114 4.00000 3.00000 25.0% 775 104s 8 7 3.00000 1 127 4.00000 3.00000 25.0% 678 112s 10 8 3.00000 1 123 4.00000 3.00000 25.0% 543 122s 11 9 3.00000 1 112 4.00000 3.00000 25.0% 493 125s 13 10 3.00000 1 98 4.00000 3.00000 25.0% 418 130s 14 11 3.00000 1 114 4.00000 3.00000 25.0% 388 137s 18 14 3.00000 16 123 4.00000 3.00000 25.0% 15847 140s 21 14 infeasible 18 4.00000 3.00000 25.0% 14173 146s Explored 27 nodes (608985 simplex iterations) in 149.21 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%