current bounds on the number of colors: 0 -- 107 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:59:34 2012 Optimize a model with 31748 rows, 6268 columns and 100594 nonzeros Presolve time: 0.15s Presolved: 31748 rows, 6268 columns, 100594 nonzeros Variable types: 0 continuous, 6268 integer (6268 binary) Root relaxation: objective 0.000000e+00, 270 iterations, 0.04 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 (505 simplex iterations) in 0.22 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 -- 53 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:59:34 2012 Optimize a model with 15629 rows, 3379 columns and 49348 nonzeros Presolve time: 0.06s Presolved: 15629 rows, 3379 columns, 49348 nonzeros Variable types: 0 continuous, 3379 integer (3379 binary) Root relaxation: objective 0.000000e+00, 234 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 (435 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 -- 26 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:59:35 2012 Optimize a model with 7868 rows, 1988 columns and 24674 nonzeros Presolve time: 0.02s Presolved: 7868 rows, 1988 columns, 24674 nonzeros Variable types: 0 continuous, 1988 integer (1988 binary) Root relaxation: objective 0.000000e+00, 223 iterations, 0.00 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 (529 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 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:59:35 2012 Optimize a model with 3689 rows, 1239 columns and 11388 nonzeros Presolve time: 0.01s Presolved: 3689 rows, 1239 columns, 11388 nonzeros Variable types: 0 continuous, 1239 integer (1239 binary) Root relaxation: objective 0.000000e+00, 232 iterations, 0.00 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 (1679 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 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:59:35 2012 Optimize a model with 1898 rows, 918 columns and 5694 nonzeros Presolve time: 0.00s Presolved: 1898 rows, 918 columns, 5694 nonzeros Variable types: 0 continuous, 918 integer (918 binary) Root relaxation: objective 0.000000e+00, 237 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 0 212 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 2 Clique: 246 Zero half: 377 Explored 0 nodes (1308 simplex iterations) in 0.09 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: 3 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:59:35 2012 Optimize a model with 2495 rows, 1025 columns and 7592 nonzeros Presolve time: 0.01s Presolved: 2495 rows, 1025 columns, 7592 nonzeros Variable types: 0 continuous, 1025 integer (1025 binary) Root relaxation: objective 0.000000e+00, 235 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 0 130 - 0.00000 - - 0s 0 0 0.00000 0 120 - 0.00000 - - 0s 0 0 0.00000 0 310 - 0.00000 - - 0s 0 0 0.00000 0 309 - 0.00000 - - 0s 0 0 0.00000 0 304 - 0.00000 - - 1s 0 0 0.00000 0 299 - 0.00000 - - 1s 0 0 0.00000 0 311 - 0.00000 - - 1s 0 0 0.00000 0 317 - 0.00000 - - 1s 0 0 0.00000 0 313 - 0.00000 - - 1s 0 0 0.00000 0 310 - 0.00000 - - 2s 0 0 0.00000 0 308 - 0.00000 - - 2s 0 0 0.00000 0 307 - 0.00000 - - 3s 0 0 0.00000 0 302 - 0.00000 - - 3s 0 0 0.00000 0 296 - 0.00000 - - 3s 0 0 0.00000 0 304 - 0.00000 - - 4s 0 0 0.00000 0 298 - 0.00000 - - 4s 0 0 0.00000 0 297 - 0.00000 - - 5s 0 0 0.00000 0 289 - 0.00000 - - 5s 0 0 0.00000 0 308 - 0.00000 - - 5s 0 0 0.00000 0 308 - 0.00000 - - 5s 0 2 0.00000 0 308 - 0.00000 - - 6s Cutting planes: Clique: 16 Zero half: 21 Explored 33 nodes (42418 simplex iterations) in 6.75 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: 4 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:59:42 2012 Optimize a model with 3092 rows, 1132 columns and 9490 nonzeros Presolve time: 0.01s Presolved: 3092 rows, 1132 columns, 9490 nonzeros Variable types: 0 continuous, 1132 integer (1132 binary) Root relaxation: objective 0.000000e+00, 238 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 0 147 - 0.00000 - - 0s 0 0 0.00000 0 135 - 0.00000 - - 0s 0 0 0.00000 0 196 - 0.00000 - - 0s 0 0 0.00000 0 264 - 0.00000 - - 0s 0 0 0.00000 0 202 - 0.00000 - - 0s 0 0 0.00000 0 238 - 0.00000 - - 1s 0 0 0.00000 0 230 - 0.00000 - - 1s 0 0 0.00000 0 220 - 0.00000 - - 1s 0 0 0.00000 0 217 - 0.00000 - - 1s 0 0 0.00000 0 206 - 0.00000 - - 1s 0 0 0.00000 0 200 - 0.00000 - - 1s 0 0 0.00000 0 210 - 0.00000 - - 1s 0 0 0.00000 0 210 - 0.00000 - - 1s 0 2 0.00000 0 210 - 0.00000 - - 2s * 301 2 21 0.0000000 0.00000 0.0% 56.7 2s Cutting planes: Clique: 2 Zero half: 13 Explored 302 nodes (39394 simplex iterations) in 2.83 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: 5