current bounds on the number of colors: 0 -- 57 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:02:14 2012 Optimize a model with 21701 rows, 2369 columns and 66528 nonzeros Presolve time: 0.09s Presolved: 21701 rows, 2369 columns, 66528 nonzeros Variable types: 0 continuous, 2369 integer (2369 binary) Root relaxation: objective 0.000000e+00, 160 iterations, 0.02 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 (390 simplex iterations) in 0.14 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 -- 28 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:02:14 2012 Optimize a model with 10879 rows, 1571 columns and 33264 nonzeros Presolve time: 0.03s Presolved: 10879 rows, 1571 columns, 33264 nonzeros Variable types: 0 continuous, 1571 integer (1571 binary) Root relaxation: objective 0.000000e+00, 121 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 (617 simplex iterations) in 0.08 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 -- 14 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:02:14 2012 Optimize a model with 5468 rows, 1172 columns and 16632 nonzeros Presolve time: 0.01s Presolved: 5468 rows, 1172 columns, 16632 nonzeros Variable types: 0 continuous, 1172 integer (1172 binary) Root relaxation: objective 0.000000e+00, 117 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 66 - 0.00000 - - 0s 0 0 0.00000 0 56 - 0.00000 - - 0s 0 0 0.00000 0 307 - 0.00000 - - 1s 0 0 0.00000 0 360 - 0.00000 - - 1s 0 0 0.00000 0 332 - 0.00000 - - 2s 0 0 0.00000 0 338 - 0.00000 - - 5s 0 0 0.00000 0 342 - 0.00000 - - 6s 0 0 0.00000 0 342 - 0.00000 - - 7s 0 0 0.00000 0 333 - 0.00000 - - 7s 0 2 0.00000 0 332 - 0.00000 - - 8s Cutting planes: Clique: 90 Zero half: 20 Explored 3 nodes (35639 simplex iterations) in 9.08 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 -- 14 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:02:24 2012 Optimize a model with 7787 rows, 1343 columns and 23760 nonzeros Presolve time: 0.02s Presolved: 7787 rows, 1343 columns, 23760 nonzeros Variable types: 0 continuous, 1343 integer (1343 binary) Root relaxation: objective 0.000000e+00, 120 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 46 - 0.00000 - - 0s 0 0 0.00000 0 68 - 0.00000 - - 0s 0 0 0.00000 0 107 - 0.00000 - - 1s 0 0 0.00000 0 259 - 0.00000 - - 1s 0 0 0.00000 0 202 - 0.00000 - - 2s 0 0 0.00000 0 257 - 0.00000 - - 3s 0 0 0.00000 0 248 - 0.00000 - - 3s 0 0 0.00000 0 231 - 0.00000 - - 4s 0 0 0.00000 0 247 - 0.00000 - - 5s 0 0 0.00000 0 245 - 0.00000 - - 6s 0 2 0.00000 0 235 - 0.00000 - - 7s * 122 1 28 0.0000000 0.00000 0.0% 79.8 7s Cutting planes: Clique: 74 Zero half: 3 Explored 123 nodes (42403 simplex iterations) in 7.77 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: 7 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:02:32 2012 Optimize a model with 6241 rows, 1229 columns and 19008 nonzeros Presolve time: 0.02s Presolved: 6241 rows, 1229 columns, 19008 nonzeros Variable types: 0 continuous, 1229 integer (1229 binary) Root relaxation: objective 0.000000e+00, 134 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 50 - 0.00000 - - 0s 0 0 0.00000 0 78 - 0.00000 - - 0s 0 0 0.00000 0 234 - 0.00000 - - 1s 0 0 0.00000 0 293 - 0.00000 - - 1s 0 0 0.00000 0 258 - 0.00000 - - 3s 0 0 0.00000 0 223 - 0.00000 - - 4s 0 0 0.00000 0 232 - 0.00000 - - 5s 0 0 0.00000 0 253 - 0.00000 - - 7s 0 0 0.00000 0 286 - 0.00000 - - 8s 0 0 0.00000 0 286 - 0.00000 - - 8s 0 2 0.00000 0 286 - 0.00000 - - 9s 15 5 infeasible 8 - 0.00000 - 408 10s Cutting planes: Clique: 174 Zero half: 7 Explored 35 nodes (52848 simplex iterations) in 10.77 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 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:02:42 2012 Optimize a model with 7014 rows, 1286 columns and 21384 nonzeros Presolve time: 0.02s Presolved: 7014 rows, 1286 columns, 21384 nonzeros Variable types: 0 continuous, 1286 integer (1286 binary) Root relaxation: objective 0.000000e+00, 122 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 42 - 0.00000 - - 0s 0 0 0.00000 0 30 - 0.00000 - - 0s 0 0 0.00000 0 164 - 0.00000 - - 1s 0 0 0.00000 0 207 - 0.00000 - - 1s 0 0 0.00000 0 186 - 0.00000 - - 1s 0 0 0.00000 0 158 - 0.00000 - - 3s 0 0 0.00000 0 186 - 0.00000 - - 4s 0 0 0.00000 0 204 - 0.00000 - - 4s 0 0 0.00000 0 214 - 0.00000 - - 5s 0 0 0.00000 0 203 - 0.00000 - - 6s 0 2 0.00000 0 203 - 0.00000 - - 7s 199 21 infeasible 23 - 0.00000 - 142 10s 529 17 0.00000 16 159 - 0.00000 - 155 15s 704 26 0.00000 14 245 - 0.00000 - 158 20s 707 28 0.00000 12 196 - 0.00000 - 158 26s 710 30 0.00000 10 156 - 0.00000 - 157 32s 714 35 0.00000 14 173 - 0.00000 - 218 35s 793 15 infeasible 29 - 0.00000 - 215 40s 1058 3 0.00000 19 181 - 0.00000 - 209 45s Cutting planes: Clique: 49 Zero half: 2 Explored 1288 nodes (297069 simplex iterations) in 49.20 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 10