Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:49:36 2012 Optimize a model with 13329 rows, 3906 columns and 43584 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.37s Presolved: 13327 rows, 3904 columns, 43154 nonzeros Variable types: 0 continuous, 3904 integer (3904 binary) Found heuristic solution: objective 61.0000000 Root relaxation: objective 2.000000e+00, 2827 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 0 124 61.00000 2.00000 96.7% - 0s H 0 0 58.0000000 2.00000 96.6% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 3.00000 0 2382 5.00000 3.00000 40.0% - 3s H 0 0 4.0000000 3.00000 25.0% - 4s 0 0 infeasible 0 4.00000 3.00001 25.0% - 5s Cutting planes: Clique: 132 Explored 0 nodes (16647 simplex iterations) in 5.12 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%