Gurobi 5.0.1 (linux64) logging started Mon Feb 4 19:43:52 2013 Optimize a model with 166750 rows, 10000 columns and 505000 nonzeros Presolve removed 11605 rows and 5075 columns Presolve time: 2.32s Presolved: 155145 rows, 4925 columns, 469701 nonzeros Variable types: 44 continuous, 4881 integer (4881 binary) Found heuristic solution: objective 231011.00000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 28520 1.6197832e+05 0.000000e+00 4.748336e+07 5s 48989 1.7325389e+05 0.000000e+00 0.000000e+00 8s 48989 1.7325389e+05 0.000000e+00 0.000000e+00 8s Root relaxation: objective 1.732539e+05, 48989 iterations, 8.08 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 173253.889 0 16 231011.000 173253.889 25.0% - 11s H 0 0 173263.00000 173253.889 0.01% - 11s Explored 0 nodes (49210 simplex iterations) in 11.32 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.732630000000e+05, best bound 1.732540000000e+05, gap 0.0052%