current bounds on the number of colors: 0 -- 123 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:55:47 2012 Optimize a model with 51546 rows, 8346 columns and 161772 nonzeros Presolve time: 0.17s Presolved: 51546 rows, 8346 columns, 161772 nonzeros Variable types: 0 continuous, 8346 integer (8346 binary) Root relaxation: objective 0.000000e+00, 308 iterations, 0.06 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 (605 simplex iterations) in 0.30 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 -- 61 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:55:48 2012 Optimize a model with 25413 rows, 4533 columns and 79560 nonzeros Presolve time: 0.11s Presolved: 25413 rows, 4533 columns, 79560 nonzeros Variable types: 0 continuous, 4533 integer (4533 binary) Root relaxation: objective 0.000000e+00, 301 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 (567 simplex iterations) in 0.17 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 -- 30 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:55:49 2012 Optimize a model with 12768 rows, 2688 columns and 39780 nonzeros Presolve time: 0.04s Presolved: 12768 rows, 2688 columns, 39780 nonzeros Variable types: 0 continuous, 2688 integer (2688 binary) Root relaxation: objective 0.000000e+00, 256 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 (513 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 -- 15 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:55:49 2012 Optimize a model with 6024 rows, 1704 columns and 18564 nonzeros Presolve time: 0.02s Presolved: 6024 rows, 1704 columns, 18564 nonzeros Variable types: 0 continuous, 1704 integer (1704 binary) Root relaxation: objective 0.000000e+00, 261 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 (1815 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 -- 7 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:55:49 2012 Optimize a model with 2652 rows, 1212 columns and 7956 nonzeros Presolve time: 0.01s Presolved: 2652 rows, 1212 columns, 7956 nonzeros Variable types: 0 continuous, 1212 integer (1212 binary) Root relaxation: objective 0.000000e+00, 265 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 0 198 - 0.00000 - - 0s 0 0 0.00000 0 298 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (5793 simplex iterations) in 0.62 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 21:55:50 2012 Optimize a model with 4338 rows, 1458 columns and 13260 nonzeros Presolve time: 0.01s Presolved: 4338 rows, 1458 columns, 13260 nonzeros Variable types: 0 continuous, 1458 integer (1458 binary) Root relaxation: objective 0.000000e+00, 258 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 0 244 - 0.00000 - - 0s 0 0 0.00000 0 178 - 0.00000 - - 0s 0 0 0.00000 0 226 - 0.00000 - - 1s 0 0 0.00000 0 381 - 0.00000 - - 1s 0 0 0.00000 0 215 - 0.00000 - - 2s 0 0 0.00000 0 209 - 0.00000 - - 2s 0 0 0.00000 0 205 - 0.00000 - - 3s 0 0 0.00000 0 215 - 0.00000 - - 3s 0 0 0.00000 0 184 - 0.00000 - - 4s 0 0 0.00000 0 192 - 0.00000 - - 4s 0 0 0.00000 0 279 - 0.00000 - - 5s 0 0 0.00000 0 279 - 0.00000 - - 5s 0 2 0.00000 0 279 - 0.00000 - - 6s 301 39 0.00000 15 274 - 0.00000 - 136 10s 604 100 0.00000 18 373 - 0.00000 - 130 15s 608 103 0.00000 22 214 - 0.00000 - 129 20s 612 105 0.00000 12 298 - 0.00000 - 128 25s 616 108 0.00000 17 178 - 0.00000 - 127 30s 625 112 0.00000 13 298 - 0.00000 - 240 35s 697 116 0.00000 27 274 - 0.00000 - 243 40s 886 64 infeasible 27 - 0.00000 - 251 45s 1088 55 infeasible 29 - 0.00000 - 253 50s 1280 61 0.00000 23 248 - 0.00000 - 256 55s 1489 82 infeasible 35 - 0.00000 - 257 60s 1713 74 infeasible 28 - 0.00000 - 257 65s 1900 85 infeasible 31 - 0.00000 - 260 70s 2094 89 0.00000 27 289 - 0.00000 - 263 75s 2294 113 infeasible 31 - 0.00000 - 263 80s 2482 137 0.00000 24 298 - 0.00000 - 264 85s 2672 159 0.00000 24 293 - 0.00000 - 265 90s 2876 157 0.00000 28 263 - 0.00000 - 267 95s 3099 160 0.00000 27 289 - 0.00000 - 266 100s 3286 169 infeasible 26 - 0.00000 - 268 105s 3487 158 infeasible 33 - 0.00000 - 269 110s 3704 173 0.00000 29 290 - 0.00000 - 269 115s 3906 177 infeasible 29 - 0.00000 - 270 120s 4105 170 infeasible 31 - 0.00000 - 271 125s 4309 158 0.00000 26 301 - 0.00000 - 272 130s 4508 165 infeasible 27 - 0.00000 - 272 135s 4695 156 0.00000 27 278 - 0.00000 - 273 140s 4895 140 infeasible 27 - 0.00000 - 274 145s 5087 140 0.00000 24 305 - 0.00000 - 275 150s 5310 151 infeasible 33 - 0.00000 - 274 155s 5513 136 0.00000 24 300 - 0.00000 - 274 160s 5717 130 0.00000 19 297 - 0.00000 - 275 165s 5921 156 infeasible 30 - 0.00000 - 275 170s 6154 169 0.00000 35 250 - 0.00000 - 274 175s 6386 155 infeasible 27 - 0.00000 - 273 180s 6576 157 infeasible 24 - 0.00000 - 274 185s 6790 171 0.00000 31 280 - 0.00000 - 274 190s 7006 169 infeasible 30 - 0.00000 - 273 195s 7201 162 infeasible 29 - 0.00000 - 274 200s 7435 182 0.00000 40 263 - 0.00000 - 273 205s 7651 164 infeasible 30 - 0.00000 - 273 210s 7844 159 infeasible 31 - 0.00000 - 274 215s 8051 172 infeasible 33 - 0.00000 - 274 220s 8261 160 infeasible 32 - 0.00000 - 274 225s 8474 165 infeasible 38 - 0.00000 - 274 230s 8683 148 infeasible 29 - 0.00000 - 274 235s 8864 137 infeasible 33 - 0.00000 - 275 240s 9065 130 0.00000 27 269 - 0.00000 - 275 245s 9279 130 0.00000 28 270 - 0.00000 - 275 250s 9531 134 infeasible 35 - 0.00000 - 274 255s 9762 149 0.00000 27 291 - 0.00000 - 273 260s 9976 143 infeasible 32 - 0.00000 - 273 265s 10192 153 infeasible 27 - 0.00000 - 273 270s 10430 167 infeasible 33 - 0.00000 - 273 275s 10660 169 infeasible 31 - 0.00000 - 272 280s 10882 183 infeasible 34 - 0.00000 - 272 285s 11113 174 0.00000 29 273 - 0.00000 - 272 290s 11310 177 0.00000 32 281 - 0.00000 - 272 295s Cutting planes: Clique: 1 Zero half: 10 Explored 11370 nodes (3131423 simplex iterations) in 296.42 seconds Thread count was 1 (of 16 available processors) Time limit reached Best objective -, best bound 0.000000000000e+00, gap - current bounds on the number of colors: 5 -- 7 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 22:00:46 2012 Optimize a model with 5181 rows, 1581 columns and 15912 nonzeros Presolve time: 0.01s Presolved: 5181 rows, 1581 columns, 15912 nonzeros Variable types: 0 continuous, 1581 integer (1581 binary) Root relaxation: objective 0.000000e+00, 254 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 0 246 - 0.00000 - - 0s Explored 0 nodes (603 simplex iterations) in 0.03 seconds Thread count was 1 (of 16 available processors) Time limit reached Best objective -, best bound 0.000000000000e+00, gap - optimal solution found: number of colors: 7