Gurobi 5.0.1 (linux64) logging started Fri Nov 16 18:01:35 2012 Optimize a model with 6215 rows, 12432 columns and 30523 nonzeros Presolve removed 45 rows and 4775 columns Presolve time: 0.14s Presolved: 6170 rows, 7657 columns, 25638 nonzeros Variable types: 0 continuous, 7657 integer (7657 binary) Found heuristic solution: objective 111.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: objective 2.000000e+00, 116 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 34 3.00000 2.00000 33.3% - 0s 0 0 infeasible 0 3.00000 2.00000 33.3% - 0s Explored 0 nodes (209 simplex iterations) in 0.17 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%