Gurobi 5.0.1 (linux64) logging started Mon Feb 4 19:31:42 2013 Optimize a model with 138509 rows, 8836 columns and 419710 nonzeros Presolve removed 7881 rows and 4467 columns Presolve time: 1.32s Presolved: 130628 rows, 4369 columns, 395159 nonzeros Variable types: 36 continuous, 4333 integer (4333 binary) Found heuristic solution: objective 215433.00000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 33004 1.5794828e+05 0.000000e+00 3.828315e+06 5s 37186 1.5966104e+05 0.000000e+00 0.000000e+00 6s 37186 1.5966104e+05 0.000000e+00 0.000000e+00 6s Root relaxation: objective 1.596610e+05, 37186 iterations, 5.97 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 159661.043 0 15 215433.000 159661.043 25.9% - 7s H 0 0 159678.00000 159661.043 0.01% - 7s H 0 0 159669.00000 159661.043 0.00% - 8s Explored 0 nodes (37257 simplex iterations) in 8.04 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.596690000000e+05, best bound 1.596620000000e+05, gap 0.0044%