Gurobi 5.0.1 (linux64) logging started Mon Feb 4 19:46:43 2013 Optimize a model with 221925 rows, 12100 columns and 671550 nonzeros Presolve removed 13477 rows and 6131 columns Presolve time: 2.95s Presolved: 208448 rows, 5969 columns, 630048 nonzeros Variable types: 44 continuous, 5925 integer (5925 binary) Found heuristic solution: objective 284879.00000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 22455 1.9862633e+05 0.000000e+00 7.956399e+07 5s 47695 2.1745642e+05 0.000000e+00 0.000000e+00 10s 47695 2.1745642e+05 0.000000e+00 0.000000e+00 10s Root relaxation: objective 2.174564e+05, 47695 iterations, 9.63 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 217456.417 0 8 284879.000 217456.417 23.7% - 13s H 0 0 217472.00000 217456.417 0.01% - 13s Explored 0 nodes (47839 simplex iterations) in 13.99 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.174720000000e+05, best bound 2.174570000000e+05, gap 0.0069%