Gurobi 5.0.1 (linux64) logging started Fri Nov 16 10:57:38 2012 Optimize a model with 15318 rows, 4830 columns and 50508 nonzeros Presolve time: 0.12s Presolved: 15318 rows, 4830 columns, 50684 nonzeros Variable types: 0 continuous, 4830 integer (4830 binary) Found heuristic solution: objective 37.0000000 Root relaxation: objective 2.000000e+00, 5151 iterations, 0.27 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 138 37.00000 2.00000 94.6% - 2s H 0 0 17.0000000 2.00000 88.2% - 2s H 0 0 5.0000000 2.00000 60.0% - 3s 0 0 2.00000 0 138 5.00000 2.00000 60.0% - 6s 0 0 2.00000 0 138 5.00000 2.00000 60.0% - 13s 0 0 2.00000 0 138 5.00000 2.00000 60.0% - 21s 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% - 45s H 0 0 4.0000000 2.00000 50.0% - 46s 0 2 2.00000 0 138 4.00000 2.00000 50.0% - 65s 1 3 3.00000 1 492 4.00000 2.00000 50.0% 41358 74s 2 4 3.00000 1 774 4.00000 3.00000 25.0% 30522 81s 7 7 3.00000 4 130 4.00000 3.00000 25.0% 10334 85s 9 5 cutoff 5 4.00000 3.00000 25.0% 10726 92s 14 4 cutoff 5 4.00000 3.00000 25.0% 7861 95s 19 3 cutoff 4 4.00000 3.00000 25.0% 6891 100s 44 2 3.00000 3 130 4.00000 3.00000 25.0% 3399 105s Cutting planes: Clique: 99 Explored 49 nodes (296706 simplex iterations) in 109.21 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%