Gurobi 5.0.1 (linux64) logging started Sat Nov 17 06:03:10 2012 Optimize a model with 68309 rows, 53130 columns and 256908 nonzeros Presolve removed 474 rows and 3220 columns (presolve time = 5s) ... Presolve removed 476 rows and 3222 columns Presolve time: 5.15s Presolved: 67833 rows, 49908 columns, 251948 nonzeros Variable types: 0 continuous, 49908 integer (49908 binary) Found heuristic solution: objective 230.0000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 34980 3.0000876e+00 4.110000e+01 0.000000e+00 5s 40775 3.0000958e+00 1.292013e+02 0.000000e+00 10s 44375 3.0000985e+00 2.534547e+01 0.000000e+00 15s 47975 3.0001015e+00 1.660678e+02 0.000000e+00 20s 51575 3.0001041e+00 1.285211e+03 0.000000e+00 25s 54875 3.0001063e+00 3.795536e+01 0.000000e+00 30s 58025 3.0001082e+00 1.901612e+01 0.000000e+00 35s 61025 3.0001103e+00 3.177960e+02 0.000000e+00 40s 64325 3.0001126e+00 5.276167e+01 0.000000e+00 45s 67475 3.0001147e+00 2.339138e+02 0.000000e+00 50s 70475 3.0001171e+00 1.231484e+01 0.000000e+00 55s 73325 3.0001193e+00 1.403670e+02 0.000000e+00 60s 76025 3.0001210e+00 1.648298e+01 0.000000e+00 65s 77822 3.0000000e+00 0.000000e+00 0.000000e+00 68s Root relaxation: objective 3.000000e+00, 77822 iterations, 67.66 seconds Total elapsed time = 122.67s Total elapsed time = 129.80s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 3.0000000 3.00000 0.0% - 132s Explored 0 nodes (168607 simplex iterations) in 132.78 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%