Gurobi 5.0.1 (linux64) logging started Fri Nov 16 10:18:50 2012 Optimize a model with 15776 rows, 4692 columns and 51748 nonzeros Presolve time: 0.12s Presolved: 15776 rows, 4692 columns, 51940 nonzeros Variable types: 0 continuous, 4692 integer (4692 binary) Found heuristic solution: objective 45.0000000 Root relaxation: objective 2.000000e+00, 5158 iterations, 0.30 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 136 45.00000 2.00000 95.6% - 2s H 0 0 13.0000000 2.00000 84.6% - 2s H 0 0 5.0000000 2.00000 60.0% - 2s 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% - 19s 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% - 36s 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% - 67s 1 3 3.00000 1 669 5.00000 2.00000 60.0% 46721 78s 2 4 3.00000 1 793 5.00000 3.00000 40.0% 38412 89s 4 4 3.00000 2 250 5.00000 3.00000 40.0% 21338 91s 6 6 3.20000 4 674 5.00000 3.00000 40.0% 17102 97s 7 7 3.20000 4 369 5.00000 3.00000 40.0% 18356 106s * 23 7 17 4.0000000 3.00000 25.0% 5728 106s 33 3 cutoff 4 4.00000 3.00000 25.0% 4512 112s 42 2 3.00000 3 199 4.00000 3.00000 25.0% 3950 115s Cutting planes: Clique: 155 Explored 47 nodes (292142 simplex iterations) in 117.03 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%