Gurobi 5.0.1 (linux64) logging started Sat Nov 17 11:18:15 2012 Optimize a model with 75391 rows, 61752 columns and 286686 nonzeros Presolve removed 519 rows and 5704 columns (presolve time = 5s) ... Presolve removed 521 rows and 5706 columns Presolve time: 6.68s Presolved: 74870 rows, 56046 columns, 279138 nonzeros Variable types: 0 continuous, 56046 integer (56046 binary) Found heuristic solution: objective 248.0000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 39907 3.0001337e+00 1.622429e+03 0.000000e+00 5s 44797 3.0001630e+00 8.920000e+01 0.000000e+00 10s 50951 3.0001776e+00 5.385002e+02 0.000000e+00 15s 53934 3.0001879e+00 3.453931e+02 0.000000e+00 20s 56760 3.0001935e+00 8.747553e+01 0.000000e+00 25s 59586 3.0001977e+00 1.051216e+02 0.000000e+00 30s 62098 3.0002009e+00 5.517813e+01 0.000000e+00 35s 64767 3.0002043e+00 1.778959e+01 0.000000e+00 40s 67436 3.0002077e+00 5.641786e+01 0.000000e+00 45s 69948 3.0002104e+00 1.515543e+02 0.000000e+00 50s 72774 3.0002143e+00 1.005245e+02 0.000000e+00 55s 75600 3.0002206e+00 2.685572e+02 0.000000e+00 60s 78426 3.0002261e+00 2.399000e+02 0.000000e+00 65s 81409 3.0002333e+00 3.680150e+01 0.000000e+00 70s 84078 3.0002367e+00 1.665818e+01 0.000000e+00 75s 86747 3.0002381e+00 5.328647e+00 0.000000e+00 80s 87349 3.0000000e+00 0.000000e+00 0.000000e+00 81s Root relaxation: objective 3.000000e+00, 87349 iterations, 81.25 seconds Total elapsed time = 143.21s Total elapsed time = 146.53s Total elapsed time = 150.59s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 52 248.00000 3.00000 98.8% - 150s H 0 0 3.0000000 3.00000 0.0% - 150s Explored 0 nodes (173093 simplex iterations) in 150.91 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%