Gurobi 5.0.1 (linux64) logging started Sat Nov 17 08:43:03 2012 Optimize a model with 71759 rows, 57840 columns and 271918 nonzeros Presolve removed 981 rows and 5040 columns (presolve time = 5s) ... Presolve removed 983 rows and 5042 columns Presolve time: 6.25s Presolved: 70776 rows, 52798 columns, 263888 nonzeros Variable types: 0 continuous, 52798 integer (52798 binary) Found heuristic solution: objective 240.0000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 35071 3.0000863e+00 4.153333e+01 0.000000e+00 5s 39661 3.0000900e+00 1.180000e+02 0.000000e+00 10s 43180 3.0000945e+00 8.432805e+01 0.000000e+00 15s 45781 3.0000963e+00 6.041372e+01 0.000000e+00 20s 48535 3.0000979e+00 2.423180e+01 0.000000e+00 25s 51136 3.0000997e+00 3.173207e+01 0.000000e+00 30s 53737 3.0001011e+00 3.349955e+01 0.000000e+00 35s 56185 3.0001026e+00 3.132316e+01 0.000000e+00 40s 58939 3.0001045e+00 3.725475e+01 0.000000e+00 45s 61540 3.0001064e+00 2.149246e+01 0.000000e+00 50s 64141 3.0001091e+00 1.522967e+01 0.000000e+00 55s 66436 3.0001110e+00 5.684063e+01 0.000000e+00 60s 69190 3.0001149e+00 4.789587e+01 0.000000e+00 65s 71947 3.0001154e+00 1.081978e+00 0.000000e+00 70s 72061 3.0000000e+00 0.000000e+00 0.000000e+00 70s Root relaxation: objective 3.000000e+00, 72061 iterations, 70.29 seconds Total elapsed time = 139.88s Total elapsed time = 145.37s 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% - 148s Explored 0 nodes (171976 simplex iterations) in 148.53 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%