Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:14:27 2012 Optimize a model with 3353 rows, 1560 columns and 11425 nonzeros Presolve removed 1055 rows and 2 columns Presolve time: 0.11s Presolved: 2298 rows, 1558 columns, 8967 nonzeros Variable types: 0 continuous, 1558 integer (1558 binary) Found heuristic solution: objective 39.0000000 Root relaxation: objective 3.000000e+00, 2548 iterations, 0.20 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 405 39.00000 3.00000 92.3% - 0s H 0 0 30.0000000 3.00000 90.0% - 0s H 0 0 15.0000000 3.00000 80.0% - 0s 0 0 3.00000 0 404 15.00000 3.00000 80.0% - 1s H 0 0 5.0000000 3.00000 40.0% - 1s 0 0 3.03704 0 848 5.00000 3.03704 39.3% - 1s H 0 0 4.0000000 3.03704 24.1% - 1s Cutting planes: Zero half: 4 Explored 0 nodes (9805 simplex iterations) in 1.47 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%