Gurobi 5.0.1 (linux64) logging started Fri Nov 16 18:40:50 2012 Optimize a model with 11438 rows, 15252 columns and 48952 nonzeros Presolve removed 25 rows and 2831 columns Presolve time: 0.19s Presolved: 11413 rows, 12421 columns, 45937 nonzeros Variable types: 0 continuous, 12421 integer (12421 binary) Found heuristic solution: objective 123.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: objective 2.000000e+00, 212 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 130 3.00000 2.00000 33.3% - 0s 0 0 infeasible 0 3.00000 2.00000 33.3% - 0s Explored 0 nodes (386 simplex iterations) in 0.26 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%