Gurobi 5.0.1 (linux64) logging started Sat Nov 17 08:59:03 2012 Optimize a model with 68925 rows, 58322 columns and 263893 nonzeros Presolve removed 508 rows and 5786 columns Presolve time: 1.91s Presolved: 68417 rows, 52536 columns, 256336 nonzeros Variable types: 0 continuous, 52536 integer (52536 binary) Found heuristic solution: objective 241.0000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 37259 3.0001261e+00 1.462500e+02 0.000000e+00 5s 41539 3.0001570e+00 5.550000e+01 0.000000e+00 10s 45907 3.0001715e+00 4.050000e+01 0.000000e+00 15s 50257 3.0001779e+00 1.107425e+01 0.000000e+00 20s 53557 3.0001788e+00 1.014621e+00 0.000000e+00 25s 54027 3.0000000e+00 0.000000e+00 0.000000e+00 26s Root relaxation: objective 3.000000e+00, 54027 iterations, 25.87 seconds Total elapsed time = 81.16s Total elapsed time = 86.15s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 8 241.00000 3.00000 98.8% - 89s H 0 0 4.0000000 3.00000 25.0% - 90s H 0 0 3.0000000 3.00000 0.0% - 90s Explored 0 nodes (146086 simplex iterations) in 90.13 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%