current bounds on the number of colors: 0 -- 124 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 22:14:06 2012 Optimize a model with 46252 rows, 8432 columns and 146072 nonzeros Presolve time: 0.16s Presolved: 46252 rows, 8432 columns, 146072 nonzeros Variable types: 0 continuous, 8432 integer (8432 binary) Root relaxation: objective 0.000000e+00, 297 iterations, 0.05 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 (583 simplex iterations) in 0.27 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 -- 62 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 22:14:06 2012 Optimize a model with 23188 rows, 4588 columns and 73036 nonzeros Presolve time: 0.10s Presolved: 23188 rows, 4588 columns, 73036 nonzeros Variable types: 0 continuous, 4588 integer (4588 binary) Root relaxation: objective 0.000000e+00, 297 iterations, 0.03 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 (566 simplex iterations) in 0.15 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 -- 31 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 22:14:07 2012 Optimize a model with 11284 rows, 2604 columns and 35340 nonzeros Presolve time: 0.04s Presolved: 11284 rows, 2604 columns, 35340 nonzeros Variable types: 0 continuous, 2604 integer (2604 binary) Root relaxation: objective 0.000000e+00, 250 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 (518 simplex iterations) in 0.06 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 -- 15 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 22:14:07 2012 Optimize a model with 5332 rows, 1612 columns and 16492 nonzeros Presolve time: 0.01s Presolved: 5332 rows, 1612 columns, 16492 nonzeros Variable types: 0 continuous, 1612 integer (1612 binary) Root relaxation: objective 0.000000e+00, 257 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 (1193 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 -- 7 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 22:14:07 2012 Optimize a model with 2356 rows, 1116 columns and 7068 nonzeros Presolve time: 0.01s Presolved: 2356 rows, 1116 columns, 7068 nonzeros Variable types: 0 continuous, 1116 integer (1116 binary) Root relaxation: objective 0.000000e+00, 270 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 0 248 - 0.00000 - - 0s 0 0 0.00000 0 281 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (4949 simplex iterations) in 0.56 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 -- 7 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 22:14:08 2012 Optimize a model with 3844 rows, 1364 columns and 11780 nonzeros Presolve time: 0.01s Presolved: 3844 rows, 1364 columns, 11780 nonzeros Variable types: 0 continuous, 1364 integer (1364 binary) Root relaxation: objective 0.000000e+00, 266 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 0 230 - 0.00000 - - 0s 0 0 0.00000 0 214 - 0.00000 - - 0s 0 0 0.00000 0 316 - 0.00000 - - 0s 0 0 0.00000 0 315 - 0.00000 - - 0s 0 0 0.00000 0 319 - 0.00000 - - 0s 0 0 0.00000 0 316 - 0.00000 - - 1s 0 0 0.00000 0 343 - 0.00000 - - 1s 0 0 0.00000 0 343 - 0.00000 - - 1s 0 2 0.00000 0 249 - 0.00000 - - 2s 543 157 0.00000 28 175 - 0.00000 - 85.9 5s 609 182 0.00000 39 321 - 0.00000 - 82.2 10s 613 185 0.00000 5 286 - 0.00000 - 81.7 15s 1044 158 infeasible 36 - 0.00000 - 137 20s 1685 194 0.00000 40 190 - 0.00000 - 138 25s 2245 262 0.00000 34 188 - 0.00000 - 141 30s 2801 324 infeasible 34 - 0.00000 - 145 35s 3325 382 0.00000 29 269 - 0.00000 - 148 40s 3846 443 infeasible 40 - 0.00000 - 150 45s 4332 493 infeasible 40 - 0.00000 - 153 50s 4833 524 0.00000 36 241 - 0.00000 - 155 55s 5421 602 0.00000 46 198 - 0.00000 - 155 60s 6024 629 infeasible 39 - 0.00000 - 154 65s 6541 634 0.00000 36 241 - 0.00000 - 155 70s 7065 660 infeasible 39 - 0.00000 - 156 75s * 7494 0 41 0.0000000 0.00000 0.0% 157 79s Cutting planes: Gomory: 1 Clique: 1 Zero half: 5 Explored 7495 nodes (1193105 simplex iterations) in 79.26 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: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 22:15:27 2012 Optimize a model with 3100 rows, 1240 columns and 9424 nonzeros Presolve time: 0.01s Presolved: 3100 rows, 1240 columns, 9424 nonzeros Variable types: 0 continuous, 1240 integer (1240 binary) Root relaxation: objective 0.000000e+00, 268 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 0 246 - 0.00000 - - 0s 0 0 0.00000 0 228 - 0.00000 - - 0s 0 0 0.00000 0 283 - 0.00000 - - 1s 0 0 0.00000 0 379 - 0.00000 - - 1s 0 0 0.00000 0 348 - 0.00000 - - 1s 0 0 0.00000 0 354 - 0.00000 - - 2s 0 0 0.00000 0 354 - 0.00000 - - 3s 0 0 0.00000 0 354 - 0.00000 - - 3s 0 2 0.00000 0 354 - 0.00000 - - 4s 24 4 infeasible 9 - 0.00000 - 339 5s Cutting planes: Clique: 5 Zero half: 35 Explored 37 nodes (34062 simplex iterations) in 5.31 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 5