Gurobi 5.0.1 (linux64) logging started Sat Nov 17 10:37:03 2012 Optimize a model with 77243 rows, 60762 columns and 291262 nonzeros Presolve removed 2978 rows and 6396 columns (presolve time = 5s) ... Presolve removed 2980 rows and 6398 columns Presolve time: 7.21s Presolved: 74263 rows, 54364 columns, 276882 nonzeros Variable types: 0 continuous, 54364 integer (54364 binary) Found heuristic solution: objective 246.0000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 35087 3.0000837e+00 3.595238e+01 0.000000e+00 5s 39167 3.0000893e+00 1.268592e+02 0.000000e+00 10s 41975 3.0000911e+00 2.084233e+01 0.000000e+00 15s 44471 3.0000925e+00 8.246814e+01 0.000000e+00 20s 46967 3.0000939e+00 7.086735e+01 0.000000e+00 25s 49619 3.0000956e+00 2.919389e+01 0.000000e+00 30s 52271 3.0000971e+00 3.300867e+01 0.000000e+00 35s 54923 3.0000993e+00 1.757486e+01 0.000000e+00 40s 57731 3.0001019e+00 2.502366e+01 0.000000e+00 45s 60539 3.0001052e+00 1.441233e+01 0.000000e+00 50s 62879 3.0001067e+00 1.610978e+01 0.000000e+00 55s 65063 3.0001076e+00 2.246849e+01 0.000000e+00 60s 67403 3.0001085e+00 9.175613e+00 0.000000e+00 65s 69587 3.0001091e+00 5.241236e+01 0.000000e+00 70s 71927 3.0001095e+00 1.901486e+00 0.000000e+00 75s 74111 3.0001097e+00 1.665622e-01 0.000000e+00 80s 74373 3.0000000e+00 0.000000e+00 0.000000e+00 81s Root relaxation: objective 3.000000e+00, 74373 iterations, 80.77 seconds Total elapsed time = 153.49s 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% - 156s Explored 0 nodes (156618 simplex iterations) in 156.92 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%