Gurobi 5.0.1 (linux64) logging started Fri Nov 16 10:52:33 2012 Optimize a model with 16146 rows, 4830 columns and 52992 nonzeros Presolve time: 0.12s Presolved: 16146 rows, 4830 columns, 53117 nonzeros Variable types: 0 continuous, 4830 integer (4830 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 2.000000e+00, 4414 iterations, 0.15 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 138 46.00000 2.00000 95.7% - 0s H 0 0 15.0000000 2.00000 86.7% - 0s H 0 0 5.0000000 2.00000 60.0% - 2s 0 0 2.00000 0 138 5.00000 2.00000 60.0% - 3s 0 0 2.00000 0 138 5.00000 2.00000 60.0% - 12s 0 0 2.00000 0 138 5.00000 2.00000 60.0% - 22s 0 0 2.00000 0 138 5.00000 2.00000 60.0% - 30s 0 0 2.00000 0 138 5.00000 2.00000 60.0% - 38s 0 0 2.00000 0 138 5.00000 2.00000 60.0% - 44s H 0 0 4.0000000 2.00000 50.0% - 47s 0 2 2.00000 0 138 4.00000 2.00000 50.0% - 58s 1 3 3.00000 1 862 4.00000 2.00000 50.0% 44174 69s 2 4 3.00000 1 711 4.00000 3.00000 25.0% 34495 79s 3 5 3.00000 2 632 4.00000 3.00000 25.0% 24243 80s 7 3 cutoff 3 4.00000 3.00000 25.0% 14721 90s 13 3 3.00000 2 624 4.00000 3.00000 25.0% 9230 95s Cutting planes: Clique: 164 Explored 19 nodes (241962 simplex iterations) in 99.36 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%