Gurobi 5.0.1 (linux64) logging started Mon Feb 4 19:48:05 2013 Optimize a model with 221925 rows, 12100 columns and 671550 nonzeros Presolve removed 13842 rows and 6135 columns Presolve time: 2.94s Presolved: 208083 rows, 5965 columns, 628950 nonzeros Variable types: 44 continuous, 5921 integer (5921 binary) Found heuristic solution: objective 273777.00000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 20197 1.9092167e+05 0.000000e+00 3.505136e+08 5s 41440 2.0951553e+05 0.000000e+00 0.000000e+00 9s 41440 2.0951553e+05 0.000000e+00 0.000000e+00 9s Root relaxation: objective 2.095155e+05, 41440 iterations, 8.80 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 209515.527 0 16 273777.000 209515.527 23.5% - 13s H 0 0 209526.00000 209515.527 0.00% - 13s Explored 0 nodes (41643 simplex iterations) in 13.12 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.095260000000e+05, best bound 2.095160000000e+05, gap 0.0048%