Gurobi 5.0.1 (linux64) logging started Sat Nov 17 10:19:51 2012 Optimize a model with 75704 rows, 60270 columns and 286158 nonzeros Presolve removed 2473 rows and 5635 columns (presolve time = 5s) ... Presolve removed 2475 rows and 5637 columns Presolve time: 6.34s Presolved: 73229 rows, 54633 columns, 273800 nonzeros Variable types: 0 continuous, 54633 integer (54633 binary) Found heuristic solution: objective 245.0000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 35271 3.0000880e+00 4.656522e+01 0.000000e+00 5s 40851 3.0000953e+00 1.651859e+01 0.000000e+00 10s 44261 3.0000988e+00 7.570608e+01 0.000000e+00 15s 46896 3.0001007e+00 7.838278e+01 0.000000e+00 20s 49531 3.0001023e+00 2.955732e+01 0.000000e+00 25s 52166 3.0001039e+00 1.126691e+02 0.000000e+00 30s 54801 3.0001058e+00 2.984419e+02 0.000000e+00 35s 57281 3.0001073e+00 1.686268e+01 0.000000e+00 40s 59916 3.0001089e+00 3.752919e+01 0.000000e+00 45s 62551 3.0001124e+00 5.502299e+01 0.000000e+00 50s 65031 3.0001142e+00 5.740440e+01 0.000000e+00 55s 67511 3.0001154e+00 9.211156e+01 0.000000e+00 60s 69991 3.0001163e+00 7.470868e+01 0.000000e+00 65s 72471 3.0001172e+00 3.648409e+01 0.000000e+00 70s 74796 3.0001175e+00 1.069060e+00 0.000000e+00 75s 76033 3.0000000e+00 0.000000e+00 0.000000e+00 78s Root relaxation: objective 3.000000e+00, 76033 iterations, 77.64 seconds Total elapsed time = 161.95s Total elapsed time = 171.46s Total elapsed time = 177.25s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 279 245.00000 3.00000 98.8% - 184s H 0 0 3.0000000 3.00000 0.0% - 184s Explored 0 nodes (215238 simplex iterations) in 184.55 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%