Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:41:30 2012 Optimize a model with 12400 rows, 3906 columns and 40858 nonzeros Presolve time: 0.10s Presolved: 12400 rows, 3906 columns, 41085 nonzeros Variable types: 0 continuous, 3906 integer (3906 binary) Found heuristic solution: objective 37.0000000 Root relaxation: objective 2.000000e+00, 6826 iterations, 0.95 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 124 37.00000 2.00000 94.6% - 1s H 0 0 10.0000000 2.00000 80.0% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 2.00000 0 124 5.00000 2.00000 60.0% - 1s 0 0 2.00000 0 124 5.00000 2.00000 60.0% - 1s 0 0 2.00000 0 124 5.00000 2.00000 60.0% - 2s 0 0 2.00000 0 124 5.00000 2.00000 60.0% - 3s 0 0 2.00000 0 124 5.00000 2.00000 60.0% - 3s 0 0 2.00000 0 124 5.00000 2.00000 60.0% - 3s H 0 0 4.0000000 2.00000 50.0% - 7s 0 2 2.00000 0 124 4.00000 2.00000 50.0% - 7s 1 3 3.00000 1 740 4.00000 2.00000 50.0% 16125 13s 2 4 3.00000 1 604 4.00000 3.00000 25.0% 24532 26s 21 9 3.00000 5 116 4.00000 3.00000 25.0% 2922 30s 30 8 3.00000 2 760 4.00000 3.00000 25.0% 2706 35s 91 3 cutoff 5 4.00000 3.00000 25.0% 1133 40s 101 3 3.00000 5 118 4.00000 3.00000 25.0% 1232 45s Cutting planes: Clique: 39 Explored 107 nodes (149281 simplex iterations) in 48.17 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%