Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:40:50 2012 Optimize a model with 8215 rows, 2756 columns and 27142 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.15s Presolved: 8265 rows, 2754 columns, 29530 nonzeros Variable types: 0 continuous, 2754 integer (2754 binary) Found heuristic solution: objective 52.0000000 Root relaxation: objective 2.000000e+00, 2075 iterations, 0.06 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 104 52.00000 2.00000 96.2% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 3.00000 0 794 5.00000 3.00000 40.0% - 1s 0 0 3.00000 0 1415 5.00000 3.00000 40.0% - 1s 0 0 3.00000 0 130 5.00000 3.00000 40.0% - 5s 0 0 3.01010 0 1622 5.00000 3.01010 39.8% - 7s 0 0 3.01010 0 1741 5.00000 3.01010 39.8% - 8s 0 0 3.01010 0 1742 5.00000 3.01010 39.8% - 11s 0 0 3.01010 0 1707 5.00000 3.01010 39.8% - 14s 0 0 3.01010 0 1618 5.00000 3.01010 39.8% - 17s 0 0 3.01010 0 1667 5.00000 3.01010 39.8% - 19s 0 0 3.01010 0 1439 5.00000 3.01010 39.8% - 23s 0 0 3.01010 0 1546 5.00000 3.01010 39.8% - 27s 0 0 3.01010 0 1533 5.00000 3.01010 39.8% - 28s 0 2 3.50000 0 1533 5.00000 3.50000 30.0% - 32s * 15 3 12 4.0000000 4.00000 0.0% 627 33s Cutting planes: Clique: 26 Zero half: 8 Explored 16 nodes (167218 simplex iterations) in 33.17 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%