Gurobi 5.0.1 (linux64) logging started Sat Nov 17 11:37:07 2012 Optimize a model with 78683 rows, 62250 columns and 297055 nonzeros Presolve removed 517 rows and 4731 columns (presolve time = 5s) ... Presolve removed 519 rows and 4733 columns Presolve time: 7.00s Presolved: 78164 rows, 57517 columns, 290451 nonzeros Variable types: 0 continuous, 57517 integer (57517 binary) Found heuristic solution: objective 249.0000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 37054 3.0000927e+00 8.058824e+01 0.000000e+00 5s 42283 3.0000995e+00 1.576938e+02 0.000000e+00 10s 45803 3.0001037e+00 8.728092e+01 0.000000e+00 15s 48363 3.0001054e+00 2.611971e+01 0.000000e+00 20s 51243 3.0001076e+00 3.325890e+01 0.000000e+00 25s 54283 3.0001105e+00 4.150965e+01 0.000000e+00 30s 57163 3.0001130e+00 1.560164e+02 0.000000e+00 35s 59883 3.0001150e+00 1.542699e+02 0.000000e+00 40s 62763 3.0001171e+00 1.853831e+02 0.000000e+00 45s 65323 3.0001189e+00 2.074996e+01 0.000000e+00 50s 67883 3.0001205e+00 1.528114e+01 0.000000e+00 55s 70603 3.0001232e+00 1.614583e+02 0.000000e+00 60s 74251 3.0001296e+00 2.683186e+01 0.000000e+00 65s 75035 3.0000000e+00 0.000000e+00 0.000000e+00 66s Root relaxation: objective 3.000000e+00, 75035 iterations, 65.95 seconds Total elapsed time = 134.62s Total elapsed time = 136.28s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 14 249.00000 3.00000 98.8% - 139s H 0 0 3.0000000 3.00000 0.0% - 139s Explored 0 nodes (177614 simplex iterations) in 139.60 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%