Gurobi 5.0.1 (linux64) logging started Fri Nov 16 15:16:04 2012 Optimize a model with 5774 rows, 3080 columns and 20128 nonzeros Presolve removed 938 rows and 57 columns Presolve time: 0.14s Presolved: 4836 rows, 3023 columns, 17697 nonzeros Variable types: 0 continuous, 3023 integer (3023 binary) Found heuristic solution: objective 55.0000000 Root relaxation: objective 3.000000e+00, 3772 iterations, 0.31 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 48 55.00000 3.00000 94.5% - 1s H 0 0 32.0000000 3.00000 90.6% - 1s H 0 0 6.0000000 3.00000 50.0% - 1s H 0 0 4.0000000 3.00000 25.0% - 1s 0 0 3.00000 0 48 4.00000 3.00000 25.0% - 1s H 0 0 3.0000000 3.00000 0.0% - 1s Cutting planes: Zero half: 2 Explored 0 nodes (13556 simplex iterations) in 1.54 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%