Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:42:04 2013 Optimize a model with 1543 rows, 36792 columns and 2030042 nonzeros Presolve removed 17 rows and 56 columns Presolve time: 3.86s Presolved: 1526 rows, 36736 columns, 2026409 nonzeros Variable types: 0 continuous, 36736 integer (36736 binary) Found heuristic solution: objective 18450.000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 7920 1.4717677e+04 2.040756e+02 0.000000e+00 5s 9439 1.4743000e+04 0.000000e+00 0.000000e+00 8s Root relaxation: objective 1.474300e+04, 9439 iterations, 7.57 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 14743.000000 14743.0000 0.0% - 11s Explored 0 nodes (9439 simplex iterations) in 11.78 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.474300000000e+04, best bound 1.474300000000e+04, gap 0.0%