current bounds on the number of colors: 0 -- 48 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:09:58 2012 Optimize a model with 13656 rows, 1719 columns and 41976 nonzeros Presolve time: 0.05s Presolved: 13656 rows, 1719 columns, 41976 nonzeros Variable types: 0 continuous, 1719 integer (1719 binary) Root relaxation: objective 0.000000e+00, 98 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 (242 simplex iterations) in 0.09 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 -- 24 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:09:58 2012 Optimize a model with 6852 rows, 1143 columns and 20988 nonzeros Presolve time: 0.02s Presolved: 6852 rows, 1143 columns, 20988 nonzeros Variable types: 0 continuous, 1143 integer (1143 binary) Root relaxation: objective 0.000000e+00, 106 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 26 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (733 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 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:09:58 2012 Optimize a model with 3450 rows, 855 columns and 10494 nonzeros Presolve time: 0.01s Presolved: 3450 rows, 855 columns, 10494 nonzeros Variable types: 0 continuous, 855 integer (855 binary) Root relaxation: objective 0.000000e+00, 96 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 70 - 0.00000 - - 0s 0 0 0.00000 0 68 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2513 simplex iterations) in 0.26 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: 6 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:09:59 2012 Optimize a model with 5151 rows, 999 columns and 15741 nonzeros Presolve time: 0.01s Presolved: 5151 rows, 999 columns, 15741 nonzeros Variable types: 0 continuous, 999 integer (999 binary) Root relaxation: objective 0.000000e+00, 107 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 64 - 0.00000 - - 0s 0 0 0.00000 0 36 - 0.00000 - - 0s 0 0 0.00000 0 95 - 0.00000 - - 0s 0 0 0.00000 0 175 - 0.00000 - - 0s 0 0 0.00000 0 31 - 0.00000 - - 1s * 0 0 0 0.0000000 0.00000 0.0% - 1s Cutting planes: Clique: 14 Zero half: 9 Explored 0 nodes (10724 simplex iterations) in 1.25 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: 6 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:10:00 2012 Optimize a model with 4017 rows, 903 columns and 12243 nonzeros Presolve time: 0.01s Presolved: 4017 rows, 903 columns, 12243 nonzeros Variable types: 0 continuous, 903 integer (903 binary) Root relaxation: objective 0.000000e+00, 97 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 42 - 0.00000 - - 0s 0 0 0.00000 0 40 - 0.00000 - - 0s 0 0 0.00000 0 251 - 0.00000 - - 0s 0 0 0.00000 0 282 - 0.00000 - - 0s 0 0 0.00000 0 245 - 0.00000 - - 1s 0 0 0.00000 0 253 - 0.00000 - - 2s 0 0 0.00000 0 263 - 0.00000 - - 2s 0 0 0.00000 0 263 - 0.00000 - - 3s 0 2 0.00000 0 263 - 0.00000 - - 3s Cutting planes: Clique: 52 Zero half: 16 Explored 7 nodes (21896 simplex iterations) in 3.97 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: 7 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:10:04 2012 Optimize a model with 4584 rows, 951 columns and 13992 nonzeros Presolve time: 0.01s Presolved: 4584 rows, 951 columns, 13992 nonzeros Variable types: 0 continuous, 951 integer (951 binary) Root relaxation: objective 0.000000e+00, 96 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 32 - 0.00000 - - 0s 0 0 0.00000 0 62 - 0.00000 - - 0s 0 0 0.00000 0 157 - 0.00000 - - 0s 0 0 0.00000 0 210 - 0.00000 - - 0s 0 0 0.00000 0 180 - 0.00000 - - 1s 0 0 0.00000 0 190 - 0.00000 - - 1s 0 0 0.00000 0 187 - 0.00000 - - 1s 0 0 0.00000 0 174 - 0.00000 - - 2s 0 0 0.00000 0 201 - 0.00000 - - 2s 0 0 0.00000 0 201 - 0.00000 - - 2s 0 2 0.00000 0 201 - 0.00000 - - 3s Cutting planes: Clique: 51 Zero half: 5 Explored 21 nodes (26835 simplex iterations) in 3.92 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 9