Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:53:38 2012 Optimize a model with 13104 rows, 4032 columns and 43092 nonzeros Presolve time: 0.10s Presolved: 13104 rows, 4032 columns, 43348 nonzeros Variable types: 0 continuous, 4032 integer (4032 binary) Found heuristic solution: objective 40.0000000 Root relaxation: objective 2.000000e+00, 4559 iterations, 0.23 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 126 40.00000 2.00000 95.0% - 1s H 0 0 14.0000000 2.00000 85.7% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 2.00000 0 126 5.00000 2.00000 60.0% - 2s 0 0 2.00000 0 126 5.00000 2.00000 60.0% - 8s 0 0 2.00000 0 126 5.00000 2.00000 60.0% - 15s 0 0 2.00000 0 126 5.00000 2.00000 60.0% - 22s 0 0 2.00000 0 126 5.00000 2.00000 60.0% - 30s 0 0 2.00000 0 126 5.00000 2.00000 60.0% - 36s 0 2 2.00000 0 126 5.00000 2.00000 60.0% - 58s 1 3 2.57143 1 600 5.00000 2.00000 60.0% 43579 69s 2 4 3.00000 1 385 5.00000 2.57143 48.6% 29062 76s 18 14 3.66667 10 216 5.00000 3.00000 40.0% 4086 80s * 39 16 24 4.0000000 3.00000 25.0% 1940 84s 51 12 cutoff 7 4.00000 3.00000 25.0% 1563 85s 81 2 cutoff 6 4.00000 3.00000 25.0% 1384 90s 96 5 cutoff 6 4.00000 3.00000 25.0% 1352 95s Cutting planes: Clique: 139 Explored 128 nodes (224173 simplex iterations) in 97.92 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%