Gurobi 5.0.1 (linux64) logging started Fri Nov 16 05:56:54 2012 Optimize a model with 9575 rows, 3192 columns and 31638 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.22s Presolved: 9629 rows, 3190 columns, 34432 nonzeros Variable types: 0 continuous, 3190 integer (3190 binary) Found heuristic solution: objective 55.0000000 Root relaxation: objective 2.000000e+00, 2292 iterations, 0.06 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 112 55.00000 2.00000 96.4% - 0s H 0 0 49.0000000 2.00000 95.9% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 3.00000 0 2031 5.00000 3.00000 40.0% - 2s H 0 0 4.0000000 3.00000 25.0% - 3s 0 0 3.00000 0 1843 4.00000 3.00000 25.0% - 3s 0 0 infeasible 0 4.00000 3.00001 25.0% - 4s Cutting planes: Clique: 53 Mod-K: 1 Explored 0 nodes (15995 simplex iterations) in 4.69 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%