Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:12:13 2012 Optimize a model with 3824 rows, 650 columns and 11998 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.07s Presolved: 3847 rows, 648 columns, 18655 nonzeros Variable types: 0 continuous, 648 integer (648 binary) Found heuristic solution: objective 25.0000000 Root relaxation: objective 4.156250e+00, 3351 iterations, 0.24 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 4.15625 0 514 25.00000 4.15625 83.4% - 0s H 0 0 19.0000000 4.15625 78.1% - 0s 0 0 5.00000 0 110 19.00000 5.00000 73.7% - 1s H 0 0 10.0000000 5.00000 50.0% - 1s 0 0 5.00000 0 120 10.00000 5.00000 50.0% - 1s H 0 0 9.0000000 5.00000 44.4% - 1s 0 0 5.02868 0 552 9.00000 5.02868 44.1% - 1s H 0 0 8.0000000 5.02868 37.1% - 1s 0 0 5.06870 0 497 8.00000 5.06870 36.6% - 1s 0 0 5.08303 0 504 8.00000 5.08303 36.5% - 1s 0 0 5.10390 0 520 8.00000 5.10390 36.2% - 1s 0 0 5.10597 0 529 8.00000 5.10597 36.2% - 1s H 0 0 7.0000000 5.10597 27.1% - 1s 0 0 5.10983 0 528 7.00000 5.10983 27.0% - 2s 0 0 5.11555 0 503 7.00000 5.11555 26.9% - 2s 0 0 5.11721 0 519 7.00000 5.11721 26.9% - 3s 0 0 5.11738 0 508 7.00000 5.11738 26.9% - 3s 0 0 5.11871 0 496 7.00000 5.11871 26.9% - 3s 0 0 5.12050 0 507 7.00000 5.12050 26.9% - 3s 0 0 5.12050 0 507 7.00000 5.12050 26.9% - 3s 0 1 5.15802 0 507 7.00000 5.15802 26.3% - 4s * 19 3 18 6.0000000 6.00000 0.0% 141 4s Cutting planes: Gomory: 6 Clique: 7 Zero half: 42 Explored 20 nodes (12726 simplex iterations) in 4.83 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.000000000000e+00, best bound 6.000000000000e+00, gap 0.0%