Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:29:13 2012 Optimize a model with 11772 rows, 3782 columns and 38794 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.30s Presolved: 11831 rows, 3780 columns, 42129 nonzeros Variable types: 0 continuous, 3780 integer (3780 binary) Found heuristic solution: objective 61.0000000 Root relaxation: objective 2.000000e+00, 2896 iterations, 0.09 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 122 61.00000 2.00000 96.7% - 0s H 0 0 56.0000000 2.00000 96.4% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 230 5.00000 2.66667 46.7% - 2s 0 0 2.67429 0 3350 5.00000 2.67429 46.5% - 2s 0 0 2.67429 0 3353 5.00000 2.67429 46.5% - 4s 0 0 2.67429 0 2988 5.00000 2.67429 46.5% - 8s 0 0 2.67429 0 2924 5.00000 2.67429 46.5% - 12s 0 0 2.67429 0 2722 5.00000 2.67429 46.5% - 16s 0 0 2.67429 0 2925 5.00000 2.67429 46.5% - 20s 0 0 2.67429 0 3037 5.00000 2.67429 46.5% - 25s 0 0 2.67429 0 2994 5.00000 2.67429 46.5% - 29s 0 0 2.67429 0 3035 5.00000 2.67429 46.5% - 33s 0 0 2.67429 0 2866 5.00000 2.67429 46.5% - 37s 0 0 2.67429 0 3083 5.00000 2.67429 46.5% - 41s 0 0 2.67429 0 3083 5.00000 2.67429 46.5% - 42s 0 2 3.00000 0 3083 5.00000 3.00000 40.0% - 52s * 24 4 21 4.0000000 3.00000 25.0% 632 54s 32 2 infeasible 4 4.00000 3.00000 25.0% 531 55s Cutting planes: Clique: 97 Zero half: 10 Explored 39 nodes (137244 simplex iterations) in 55.26 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%