Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:25:07 2012 Optimize a model with 5763 rows, 2652 columns and 19737 nonzeros Presolve removed 1328 rows and 102 columns Presolve time: 0.14s Presolved: 4435 rows, 2550 columns, 16524 nonzeros Variable types: 0 continuous, 2550 integer (2550 binary) Found heuristic solution: objective 32.0000000 Root relaxation: objective 3.000000e+00, 5365 iterations, 0.58 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 96 32.00000 3.00000 90.6% - 1s H 0 0 4.0000000 3.00000 25.0% - 1s 0 0 3.00000 0 76 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 196 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 107 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 124 4.00000 3.00000 25.0% - 6s 0 0 3.00000 0 160 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 128 4.00000 3.00000 25.0% - 9s 0 0 3.00000 0 140 4.00000 3.00000 25.0% - 10s 0 0 3.00000 0 94 4.00000 3.00000 25.0% - 12s 0 0 3.00000 0 153 4.00000 3.00000 25.0% - 14s 0 0 3.00000 0 131 4.00000 3.00000 25.0% - 15s 0 2 3.00000 0 131 4.00000 3.00000 25.0% - 17s 4 4 3.00000 1 95 4.00000 3.00000 25.0% 672 20s 6 6 3.00000 1 156 4.00000 3.00000 25.0% 448 25s 8 7 3.00000 1 167 4.00000 3.00000 25.0% 336 30s 11 9 3.00000 1 118 4.00000 3.00000 25.0% 244 36s 12 10 3.00000 1 120 4.00000 3.00000 25.0% 224 40s Cutting planes: Clique: 2 Explored 19 nodes (216321 simplex iterations) in 44.13 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%