Gurobi 5.0.1 (linux64) logging started Fri Nov 16 20:49:57 2012 Optimize a model with 16674 rows, 21170 columns and 70468 nonzeros Presolve removed 32 rows and 4352 columns Presolve time: 0.32s Presolved: 16642 rows, 16818 columns, 65888 nonzeros Variable types: 0 continuous, 16818 integer (16818 binary) Found heuristic solution: objective 145.0000000 Root relaxation: objective 2.000000e+00, 11614 iterations, 0.53 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 188 145.00000 2.00000 98.6% - 1s H 0 0 137.0000000 2.00000 98.5% - 1s H 0 0 4.0000000 2.00000 50.0% - 1s H 0 0 3.0000000 2.00000 33.3% - 1s 0 0 infeasible 0 3.00000 2.00000 33.3% - 1s Explored 0 nodes (36359 simplex iterations) in 1.89 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%