Gurobi 5.0.1 (linux64) logging started Fri Nov 16 09:50:01 2012 Optimize a model with 14405 rows, 4556 columns and 47503 nonzeros Presolve time: 0.11s Presolved: 14405 rows, 4556 columns, 47750 nonzeros Variable types: 0 continuous, 4556 integer (4556 binary) Found heuristic solution: objective 41.0000000 Root relaxation: objective 2.000000e+00, 3376 iterations, 0.08 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 134 41.00000 2.00000 95.1% - 0s H 0 0 13.0000000 2.00000 84.6% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.00000 0 134 5.00000 2.00000 60.0% - 2s 0 0 2.00000 0 134 5.00000 2.00000 60.0% - 8s 0 0 2.00000 0 134 5.00000 2.00000 60.0% - 15s 0 0 2.00000 0 134 5.00000 2.00000 60.0% - 22s 0 0 2.00000 0 134 5.00000 2.00000 60.0% - 28s 0 0 2.00000 0 134 5.00000 2.00000 60.0% - 33s H 0 0 4.0000000 2.00000 50.0% - 42s 0 2 2.00000 0 134 4.00000 2.00000 50.0% - 58s 1 3 3.00000 1 881 4.00000 2.00000 50.0% 33355 67s 2 4 3.00000 1 541 4.00000 3.00000 25.0% 28565 77s 5 1 infeasible 2 4.00000 3.00000 25.0% 12777 80s Cutting planes: Clique: 115 Explored 7 nodes (148063 simplex iterations) in 80.14 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%