Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:35:46 2012 Optimize a model with 4680 rows, 2070 columns and 15930 nonzeros Presolve removed 1170 rows and 0 columns Presolve time: 0.10s Presolved: 3510 rows, 2070 columns, 13185 nonzeros Variable types: 0 continuous, 2070 integer (2070 binary) Found heuristic solution: objective 29.0000000 Root relaxation: objective 3.000000e+00, 2448 iterations, 0.10 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 92 29.00000 3.00000 89.7% - 0s H 0 0 4.0000000 3.00000 25.0% - 0s 0 0 3.00000 0 219 4.00000 3.00000 25.0% - 0s H 0 0 3.0000000 3.00000 0.0% - 0s Cutting planes: Gomory: 1 Zero half: 5 Explored 0 nodes (7891 simplex iterations) in 0.72 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%