Gurobi 5.0.1 (linux64) logging started Fri Nov 16 23:01:12 2012 Optimize a model with 39990 rows, 39006 columns and 157992 nonzeros Presolve removed 815 rows and 4927 columns Presolve time: 0.94s Presolved: 39175 rows, 34079 columns, 150699 nonzeros Variable types: 0 continuous, 34079 integer (34079 binary) Found heuristic solution: objective 197.0000000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 25711 3.0000753e+00 1.276888e+02 0.000000e+00 5s 30188 3.0000000e+00 0.000000e+00 0.000000e+00 8s Root relaxation: objective 3.000000e+00, 30188 iterations, 8.28 seconds Total elapsed time = 22.01s Total elapsed time = 26.06s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 126 197.00000 3.00000 98.5% - 27s H 0 0 3.0000000 3.00000 0.0% - 28s Explored 0 nodes (90946 simplex iterations) in 28.08 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%