Gurobi 5.0.1 (linux64) logging started Sat Nov 17 08:10:51 2012 Optimize a model with 72113 rows, 56882 columns and 272032 nonzeros Presolve removed 488 rows and 2856 columns (presolve time = 5s) ... Presolve removed 490 rows and 2858 columns Presolve time: 5.94s Presolved: 71623 rows, 54024 columns, 267384 nonzeros Variable types: 0 continuous, 54024 integer (54024 binary) Found heuristic solution: objective 238.0000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 35871 3.0000941e+00 2.080645e+01 0.000000e+00 5s 39721 3.0000992e+00 1.928591e+01 0.000000e+00 10s 42801 3.0001018e+00 2.003271e+02 0.000000e+00 15s 45881 3.0001046e+00 1.879328e+02 0.000000e+00 20s 49269 3.0001079e+00 1.960000e+02 0.000000e+00 25s 52503 3.0001118e+00 1.205733e+01 0.000000e+00 30s 55583 3.0001160e+00 3.973402e+00 0.000000e+00 35s 57867 3.0000000e+00 0.000000e+00 0.000000e+00 39s Root relaxation: objective 3.000000e+00, 57867 iterations, 39.11 seconds Total elapsed time = 85.91s Total elapsed time = 92.61s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 180 238.00000 3.00000 98.7% - 92s H 0 0 3.0000000 3.00000 0.0% - 93s Explored 0 nodes (150297 simplex iterations) in 93.15 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%