current bounds on the number of colors: 0 -- 45 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:04:09 2012 Optimize a model with 10869 rows, 1482 columns and 33462 nonzeros Presolve time: 0.04s Presolved: 10869 rows, 1482 columns, 33462 nonzeros Variable types: 0 continuous, 1482 integer (1482 binary) Root relaxation: objective 0.000000e+00, 103 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (227 simplex iterations) in 0.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 22 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:04:10 2012 Optimize a model with 5457 rows, 987 columns and 16731 nonzeros Presolve time: 0.02s Presolved: 5457 rows, 987 columns, 16731 nonzeros Variable types: 0 continuous, 987 integer (987 binary) Root relaxation: objective 0.000000e+00, 100 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (523 simplex iterations) in 0.04 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:04:10 2012 Optimize a model with 2505 rows, 717 columns and 7605 nonzeros Presolve time: 0.01s Presolved: 2505 rows, 717 columns, 7605 nonzeros Variable types: 0 continuous, 717 integer (717 binary) Root relaxation: objective 0.000000e+00, 90 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 52 - 0.00000 - - 0s 0 0 0.00000 0 88 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1613 simplex iterations) in 0.15 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - current bounds on the number of colors: 5 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:04:10 2012 Optimize a model with 3981 rows, 852 columns and 12168 nonzeros Presolve time: 0.01s Presolved: 3981 rows, 852 columns, 12168 nonzeros Variable types: 0 continuous, 852 integer (852 binary) Root relaxation: objective 0.000000e+00, 91 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 39 - 0.00000 - - 0s 0 0 0.00000 0 31 - 0.00000 - - 0s 0 0 0.00000 0 134 - 0.00000 - - 0s 0 0 0.00000 0 177 - 0.00000 - - 0s 0 0 0.00000 0 107 - 0.00000 - - 0s 0 0 0.00000 0 129 - 0.00000 - - 1s 0 0 0.00000 0 131 - 0.00000 - - 1s 0 0 0.00000 0 124 - 0.00000 - - 1s 0 0 0.00000 0 129 - 0.00000 - - 1s 0 0 0.00000 0 129 - 0.00000 - - 2s 0 2 0.00000 0 129 - 0.00000 - - 2s Cutting planes: Clique: 54 Zero half: 5 Explored 49 nodes (23854 simplex iterations) in 2.81 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 8 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:04:13 2012 Optimize a model with 4473 rows, 897 columns and 13689 nonzeros Presolve time: 0.01s Presolved: 4473 rows, 897 columns, 13689 nonzeros Variable types: 0 continuous, 897 integer (897 binary) Root relaxation: objective 0.000000e+00, 92 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 30 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (701 simplex iterations) in 0.04 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% optimal solution found: number of colors: 9