Gurobi 5.0.1 (linux64) logging started Fri Nov 16 21:31:29 2012 Optimize a model with 27160 rows, 30102 columns and 110718 nonzeros Presolve removed 1065 rows and 4327 columns Presolve time: 0.66s Presolved: 26095 rows, 25775 columns, 103496 nonzeros Variable types: 0 continuous, 25775 integer (25775 binary) Found heuristic solution: objective 173.0000000 Root relaxation: objective 3.000000e+00, 18058 iterations, 2.31 seconds Total elapsed time = 11.45s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 36 173.00000 3.00000 98.3% - 12s H 0 0 3.0000000 3.00000 0.0% - 12s Explored 0 nodes (50922 simplex iterations) in 12.99 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%