Gurobi 5.0.1 (linux64) logging started Sat Nov 17 03:35:33 2012 Optimize a model with 55303 rows, 49952 columns and 214747 nonzeros Presolve removed 926 rows and 7138 columns Presolve time: 1.49s Presolved: 54377 rows, 42814 columns, 204893 nonzeros Variable types: 0 continuous, 42814 integer (42814 binary) Found heuristic solution: objective 223.0000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 29924 3.0000806e+00 1.152941e+01 0.000000e+00 5s 34412 3.0000843e+00 4.011875e+01 0.000000e+00 10s 38356 3.0000883e+00 1.959229e+01 0.000000e+00 15s 42300 3.0000927e+00 7.177002e+00 0.000000e+00 20s 43091 3.0000000e+00 0.000000e+00 0.000000e+00 21s Root relaxation: objective 3.000000e+00, 43091 iterations, 21.27 seconds Total elapsed time = 52.48s Total elapsed time = 55.60s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 3.0000000 3.00000 0.0% - 57s Explored 0 nodes (130418 simplex iterations) in 57.76 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%