Gurobi 5.0.1 (linux64) logging started Sat Nov 17 10:42:14 2012 Optimize a model with 73852 rows, 61256 columns and 281578 nonzeros Presolve removed 522 rows and 6916 columns (presolve time = 5s) ... Presolve removed 524 rows and 6918 columns Presolve time: 6.07s Presolved: 73328 rows, 54338 columns, 272833 nonzeros Variable types: 0 continuous, 54338 integer (54338 binary) Found heuristic solution: objective 247.0000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 38752 3.0000969e+00 3.220000e+02 0.000000e+00 5s 45485 3.0001438e+00 4.542308e+01 0.000000e+00 10s 51610 3.0001585e+00 2.913677e+02 0.000000e+00 15s 54245 3.0001647e+00 6.674802e+02 0.000000e+00 20s 57035 3.0001685e+00 4.908856e+01 0.000000e+00 25s 59825 3.0001718e+00 1.833931e+02 0.000000e+00 30s 62615 3.0001745e+00 3.775820e+01 0.000000e+00 35s 65405 3.0001777e+00 2.520611e+01 0.000000e+00 40s 68040 3.0001800e+00 1.269469e+02 0.000000e+00 45s 70830 3.0001829e+00 4.462451e+02 0.000000e+00 50s 73465 3.0001859e+00 8.629929e+01 0.000000e+00 55s 76255 3.0001888e+00 3.998321e+02 0.000000e+00 60s 78735 3.0001909e+00 2.992254e+01 0.000000e+00 65s 81370 3.0001925e+00 1.793432e+02 0.000000e+00 70s 83850 3.0001940e+00 1.425441e+02 0.000000e+00 75s 86485 3.0001956e+00 1.013153e+02 0.000000e+00 80s 88965 3.0001970e+00 1.112485e+02 0.000000e+00 85s 91445 3.0001982e+00 1.119517e+01 0.000000e+00 90s 93925 3.0001993e+00 1.026116e+01 0.000000e+00 95s 95852 3.0000000e+00 0.000000e+00 0.000000e+00 99s Root relaxation: objective 3.000000e+00, 95852 iterations, 98.93 seconds 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% - 157s Explored 0 nodes (136520 simplex iterations) in 157.62 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%