current bounds on the number of colors: 0 -- 39 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:59:22 2012 Optimize a model with 7278 rows, 1122 columns and 22458 nonzeros Presolve time: 0.02s Presolved: 7278 rows, 1122 columns, 22458 nonzeros Variable types: 0 continuous, 1122 integer (1122 binary) Root relaxation: objective 0.000000e+00, 84 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 (287 simplex iterations) in 0.05 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 -- 19 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:59:22 2012 Optimize a model with 3468 rows, 732 columns and 10638 nonzeros Presolve time: 0.01s Presolved: 3468 rows, 732 columns, 10638 nonzeros Variable types: 0 continuous, 732 integer (732 binary) Root relaxation: objective 0.000000e+00, 84 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 (932 simplex iterations) in 0.05 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 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:59:22 2012 Optimize a model with 1563 rows, 537 columns and 4728 nonzeros Presolve time: 0.00s Presolved: 1563 rows, 537 columns, 4728 nonzeros Variable types: 0 continuous, 537 integer (537 binary) Root relaxation: objective 0.000000e+00, 80 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 58 - 0.00000 - - 0s 0 0 0.00000 0 56 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1278 simplex iterations) in 0.11 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: 4 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:59:22 2012 Optimize a model with 2325 rows, 615 columns and 7092 nonzeros Presolve time: 0.01s Presolved: 2325 rows, 615 columns, 7092 nonzeros Variable types: 0 continuous, 615 integer (615 binary) Root relaxation: objective 0.000000e+00, 79 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 46 - 0.00000 - - 0s 0 0 0.00000 0 40 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1833 simplex iterations) in 0.14 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 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:59:22 2012 Optimize a model with 2706 rows, 654 columns and 8274 nonzeros Presolve time: 0.01s Presolved: 2706 rows, 654 columns, 8274 nonzeros Variable types: 0 continuous, 654 integer (654 binary) Root relaxation: objective 0.000000e+00, 79 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 36 - 0.00000 - - 0s 0 0 0.00000 0 30 - 0.00000 - - 0s 0 0 0.00000 0 151 - 0.00000 - - 0s 0 0 0.00000 0 193 - 0.00000 - - 0s 0 0 0.00000 0 172 - 0.00000 - - 0s 0 0 0.00000 0 180 - 0.00000 - - 1s 0 0 0.00000 0 167 - 0.00000 - - 1s 0 0 0.00000 0 183 - 0.00000 - - 1s 0 0 0.00000 0 196 - 0.00000 - - 1s 0 0 0.00000 0 196 - 0.00000 - - 1s 0 2 0.00000 0 162 - 0.00000 - - 2s Cutting planes: Clique: 55 Zero half: 13 Explored 9 nodes (18154 simplex iterations) in 2.25 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 17:59:25 2012 Optimize a model with 3087 rows, 693 columns and 9456 nonzeros Presolve time: 0.01s Presolved: 3087 rows, 693 columns, 9456 nonzeros Variable types: 0 continuous, 693 integer (693 binary) Root relaxation: objective 0.000000e+00, 82 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 0 0 0.00000 0 21 - 0.00000 - - 0s 0 0 0.00000 0 74 - 0.00000 - - 0s 0 0 0.00000 0 136 - 0.00000 - - 0s 0 0 0.00000 0 20 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Clique: 12 Zero half: 10 Explored 0 nodes (6247 simplex iterations) in 0.52 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: 8