Gurobi 5.0.1 (linux64) logging started Fri Nov 16 05:58:49 2012 Optimize a model with 10135 rows, 3192 columns and 33318 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.23s Presolved: 10189 rows, 3190 columns, 36092 nonzeros Variable types: 0 continuous, 3190 integer (3190 binary) Found heuristic solution: objective 56.0000000 Root relaxation: objective 2.000000e+00, 2245 iterations, 0.07 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 112 56.00000 2.00000 96.4% - 0s H 0 0 49.0000000 2.00000 95.9% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 523 5.00000 2.66667 46.7% - 1s H 0 0 4.0000000 2.66667 33.3% - 1s 0 0 2.66667 0 525 4.00000 2.66667 33.3% - 2s 0 0 2.66667 0 148 4.00000 2.66667 33.3% - 4s 0 0 2.67081 0 2545 4.00000 2.67081 33.2% - 5s 0 0 2.67081 0 2613 4.00000 2.67081 33.2% - 6s 0 0 2.67081 0 2465 4.00000 2.67081 33.2% - 7s 0 0 2.67081 0 2458 4.00000 2.67081 33.2% - 9s 0 0 2.67081 0 2473 4.00000 2.67081 33.2% - 10s 0 0 2.67081 0 2489 4.00000 2.67081 33.2% - 11s 0 0 2.67081 0 2468 4.00000 2.67081 33.2% - 12s 0 0 2.67081 0 2426 4.00000 2.67081 33.2% - 13s 0 0 2.67081 0 2476 4.00000 2.67081 33.2% - 14s 0 0 2.67081 0 2475 4.00000 2.67081 33.2% - 16s 0 0 2.67081 0 2487 4.00000 2.67081 33.2% - 17s 0 0 2.67081 0 2487 4.00000 2.67081 33.2% - 17s 0 2 2.80000 0 2487 4.00000 2.80000 30.0% - 21s Cutting planes: Clique: 74 Zero half: 7 Explored 13 nodes (61126 simplex iterations) in 23.49 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%