Gurobi 5.0.1 (linux64) logging started Sat Nov 17 06:35:57 2012 Optimize a model with 66527 rows, 53592 columns and 252019 nonzeros Presolve removed 935 rows and 2541 columns (presolve time = 5s) ... Presolve removed 937 rows and 2543 columns Presolve time: 5.11s Presolved: 65590 rows, 51049 columns, 246600 nonzeros Variable types: 0 continuous, 51049 integer (51049 binary) Found heuristic solution: objective 231.0000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 30147 3.0000910e+00 2.003824e+01 0.000000e+00 5s 34291 3.0000945e+00 5.160000e+01 0.000000e+00 10s 37547 3.0000976e+00 6.407476e+01 0.000000e+00 15s 41099 3.0001013e+00 2.129010e+01 0.000000e+00 20s 44503 3.0001056e+00 6.755468e+00 0.000000e+00 25s 48055 3.0001098e+00 2.297849e+02 0.000000e+00 30s 51163 3.0001135e+00 4.950000e+02 0.000000e+00 35s 53444 3.0000000e+00 0.000000e+00 0.000000e+00 39s Root relaxation: objective 3.000000e+00, 53444 iterations, 39.34 seconds Total elapsed time = 78.04s Total elapsed time = 85.23s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 388 231.00000 3.00000 98.7% - 89s H 0 0 4.0000000 3.00000 25.0% - 90s H 0 0 3.0000000 3.00000 0.0% - 90s Explored 0 nodes (160106 simplex iterations) in 90.37 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%