Gurobi 5.0.1 (linux64) logging started Fri Nov 16 20:49:50 2012 Optimize a model with 15079 rows, 21170 columns and 65683 nonzeros Presolve removed 33 rows and 4497 columns Presolve time: 0.28s Presolved: 15046 rows, 16673 columns, 60980 nonzeros Variable types: 0 continuous, 16673 integer (16673 binary) Found heuristic solution: objective 145.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: objective 2.000000e+00, 235 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 0 146 3.00000 2.00000 33.3% - 0s 0 0 infeasible 0 3.00000 2.00000 33.3% - 0s Explored 0 nodes (394 simplex iterations) in 0.37 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%