Gurobi 5.0.1 (linux64) logging started Fri Nov 16 10:10:23 2012 Optimize a model with 16592 rows, 4692 columns and 54196 nonzeros Presolve time: 0.12s Presolved: 16592 rows, 4692 columns, 54328 nonzeros Variable types: 0 continuous, 4692 integer (4692 binary) Found heuristic solution: objective 44.0000000 Root relaxation: objective 2.000000e+00, 5091 iterations, 0.25 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 136 44.00000 2.00000 95.5% - 1s H 0 0 13.0000000 2.00000 84.6% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 2.00000 0 136 5.00000 2.00000 60.0% - 4s 0 0 2.00000 0 136 5.00000 2.00000 60.0% - 10s 0 0 2.00000 0 136 5.00000 2.00000 60.0% - 18s 0 0 2.00000 0 136 5.00000 2.00000 60.0% - 27s 0 0 2.00000 0 136 5.00000 2.00000 60.0% - 37s 0 0 2.00000 0 136 5.00000 2.00000 60.0% - 43s 0 2 2.00000 0 136 5.00000 2.00000 60.0% - 69s 1 3 3.00000 1 645 5.00000 2.00000 60.0% 50499 81s 2 4 3.00000 1 817 5.00000 3.00000 40.0% 36152 90s 5 7 4.00000 4 273 5.00000 3.00000 40.0% 16891 95s 32 16 3.00000 2 184 5.00000 3.00000 40.0% 3365 105s 35 19 3.16667 4 189 5.00000 3.00000 40.0% 3656 110s * 55 3 21 4.0000000 3.00000 25.0% 2390 110s Cutting planes: Clique: 136 Explored 61 nodes (243225 simplex iterations) in 110.94 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%