Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:51:24 2012 Optimize a model with 2958 rows, 108 columns and 5916 nonzeros Presolve removed 2141 rows and 0 columns Presolve time: 0.09s Presolved: 817 rows, 108 columns, 5711 nonzeros Variable types: 0 continuous, 108 integer (108 binary) Found heuristic solution: objective 6.0000000 Root relaxation: objective 1.448851e+01, 435 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 14.48851 0 106 6.00000 14.48851 141% - 0s H 0 0 8.0000000 14.48851 81.1% - 0s 0 0 14.16752 0 106 8.00000 14.16752 77.1% - 0s 0 0 14.07107 0 107 8.00000 14.07107 75.9% - 0s 0 0 14.05617 0 107 8.00000 14.05617 75.7% - 0s 0 0 14.01093 0 108 8.00000 14.01093 75.1% - 0s 0 0 13.96553 0 108 8.00000 13.96553 74.6% - 0s H 0 0 9.0000000 13.96553 55.2% - 0s 0 0 13.96039 0 108 9.00000 13.96039 55.1% - 1s 0 0 13.95556 0 108 9.00000 13.95556 55.1% - 1s 0 0 13.94817 0 107 9.00000 13.94817 55.0% - 1s 0 0 13.94662 0 107 9.00000 13.94662 55.0% - 1s 0 0 13.94473 0 107 9.00000 13.94473 54.9% - 1s 0 0 13.94464 0 107 9.00000 13.94464 54.9% - 1s 0 0 13.94457 0 108 9.00000 13.94457 54.9% - 1s 0 0 13.94456 0 108 9.00000 13.94456 54.9% - 2s 0 2 13.94388 0 108 9.00000 13.94388 54.9% - 2s Cutting planes: Clique: 87 Explored 178 nodes (13392 simplex iterations) in 2.95 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.000000000000e+00, best bound 9.000000000000e+00, gap 0.0%