Gurobi 5.0.1 (linux64) logging started Fri Nov 16 09:37:22 2012 Optimize a model with 12803 rows, 4422 columns and 42502 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.38s Presolved: 12867 rows, 4420 columns, 46470 nonzeros Variable types: 0 continuous, 4420 integer (4420 binary) Found heuristic solution: objective 66.0000000 Root relaxation: objective 2.000000e+00, 3248 iterations, 0.10 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 132 66.00000 2.00000 97.0% - 0s H 0 0 56.0000000 2.00000 96.4% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 3.00000 0 1846 5.00000 3.00000 40.0% - 3s H 0 0 4.0000000 3.00000 25.0% - 3s 0 0 infeasible 0 4.00000 3.00001 25.0% - 4s Cutting planes: Clique: 93 Zero half: 1 Explored 0 nodes (18579 simplex iterations) in 4.74 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%