Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:11:44 2012 Optimize a model with 2959 rows, 1406 columns and 10099 nonzeros Presolve removed 742 rows and 2 columns Presolve time: 0.10s Presolved: 2217 rows, 1404 columns, 8203 nonzeros Variable types: 0 continuous, 1404 integer (1404 binary) Found heuristic solution: objective 37.0000000 Root relaxation: objective 3.000000e+00, 1992 iterations, 0.13 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 50 37.00000 3.00000 91.9% - 0s H 0 0 4.0000000 3.00000 25.0% - 0s 0 0 3.00000 0 93 4.00000 3.00000 25.0% - 0s 0 0 3.00000 0 67 4.00000 3.00000 25.0% - 0s 0 0 3.00000 0 66 4.00000 3.00000 25.0% - 1s * 0 0 0 3.0000000 3.00000 0.0% - 1s Cutting planes: Zero half: 19 Explored 0 nodes (14646 simplex iterations) in 1.40 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%