Gurobi 5.0.1 (linux64) logging started Fri Nov 16 13:43:59 2012 Optimize a model with 19684 rows, 5550 columns and 64306 nonzeros Presolve time: 0.15s Presolved: 19684 rows, 5550 columns, 64415 nonzeros Variable types: 0 continuous, 5550 integer (5550 binary) Found heuristic solution: objective 52.0000000 Root relaxation: objective 2.000000e+00, 4517 iterations, 0.15 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 148 52.00000 2.00000 96.2% - 1s H 0 0 13.0000000 2.00000 84.6% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 2.00000 0 148 5.00000 2.00000 60.0% - 4s 0 0 2.00000 0 148 5.00000 2.00000 60.0% - 12s 0 0 2.00000 0 148 5.00000 2.00000 60.0% - 23s 0 0 2.00000 0 148 5.00000 2.00000 60.0% - 34s 0 0 2.00000 0 148 5.00000 2.00000 60.0% - 47s 0 0 2.00000 0 148 5.00000 2.00000 60.0% - 58s 0 2 2.00000 0 148 5.00000 2.00000 60.0% - 88s 1 3 2.66667 1 553 5.00000 2.00000 60.0% 81975 112s 2 4 2.50000 1 145 5.00000 2.50000 50.0% 60188 126s 3 5 2.75000 2 252 5.00000 2.50000 50.0% 49091 134s 6 6 4.00000 4 188 5.00000 2.66667 46.7% 25126 135s * 28 6 23 4.0000000 2.66667 33.3% 5561 136s Cutting planes: Clique: 120 Explored 38 nodes (302074 simplex iterations) in 139.99 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%