Gurobi 5.0.1 (linux64) logging started Sat Nov 17 02:59:15 2012 Optimize a model with 55470 rows, 49062 columns and 214368 nonzeros Presolve removed 466 rows and 4864 columns Presolve time: 1.40s Presolved: 55004 rows, 44198 columns, 207903 nonzeros Variable types: 0 continuous, 44198 integer (44198 binary) Found heuristic solution: objective 221.0000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 32218 3.0000793e+00 5.607500e+02 0.000000e+00 5s 38066 3.0000841e+00 2.844034e+01 0.000000e+00 10s 42010 3.0000874e+00 1.597104e+02 0.000000e+00 15s 45954 3.0000898e+00 1.135919e+02 0.000000e+00 20s 49607 3.0000000e+00 0.000000e+00 0.000000e+00 24s Root relaxation: objective 3.000000e+00, 49607 iterations, 24.39 seconds Total elapsed time = 57.84s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 3.0000000 3.00000 0.0% - 59s Explored 0 nodes (98051 simplex iterations) in 59.04 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%