Gurobi 5.0.1 (linux64) logging started Sat Nov 17 09:54:41 2012 Optimize a model with 79055 rows, 59780 columns and 295726 nonzeros Presolve removed 988 rows and 2928 columns (presolve time = 5s) ... Presolve removed 990 rows and 2930 columns Presolve time: 6.78s Presolved: 78065 rows, 56850 columns, 289718 nonzeros Variable types: 0 continuous, 56850 integer (56850 binary) Found heuristic solution: objective 244.0000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 39074 3.0000952e+00 4.918000e+01 0.000000e+00 5s 44964 3.0001034e+00 7.052703e+01 0.000000e+00 10s 47844 3.0001060e+00 3.643437e+01 0.000000e+00 15s 50564 3.0001082e+00 2.269400e+01 0.000000e+00 20s 53444 3.0001107e+00 1.724720e+03 0.000000e+00 25s 56164 3.0001125e+00 9.217423e+01 0.000000e+00 30s 59044 3.0001142e+00 1.755989e+01 0.000000e+00 35s 61764 3.0001161e+00 1.034962e+01 0.000000e+00 40s 64324 3.0001173e+00 4.669457e+01 0.000000e+00 45s 67044 3.0001181e+00 2.833210e+02 0.000000e+00 50s 69444 3.0001186e+00 1.840715e+01 0.000000e+00 55s 72164 3.0001187e+00 2.346584e-02 0.000000e+00 60s 72219 3.0000000e+00 0.000000e+00 0.000000e+00 60s Root relaxation: objective 3.000000e+00, 72219 iterations, 60.24 seconds Total elapsed time = 151.68s Total elapsed time = 157.02s Total elapsed time = 169.52s Total elapsed time = 170.35s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 72 244.00000 3.00000 98.8% - 170s H 0 0 3.0000000 3.00000 0.0% - 170s Explored 0 nodes (183485 simplex iterations) in 170.75 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%