Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:02:23 2012 Optimize a model with 10079 rows, 3660 columns and 33598 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.26s Presolved: 10077 rows, 3658 columns, 33262 nonzeros Variable types: 0 continuous, 3658 integer (3658 binary) Found heuristic solution: objective 60.0000000 Root relaxation: objective 2.000000e+00, 2874 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 0 120 60.00000 2.00000 96.7% - 0s H 0 0 44.0000000 2.00000 95.5% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 3.00000 0 1499 5.00000 3.00000 40.0% - 1s 0 0 3.00000 0 1063 5.00000 3.00000 40.0% - 3s 0 0 3.00000 0 2436 5.00000 3.00000 40.0% - 3s 0 0 3.00870 0 2284 5.00000 3.00870 39.8% - 11s H 0 0 4.0000000 3.00870 24.8% - 11s Cutting planes: Clique: 15 Zero half: 2 Explored 0 nodes (46763 simplex iterations) in 11.61 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%