current bounds on the number of colors: 0 -- 183 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 02:21:10 2012 Optimize a model with 77988 rows, 17508 columns and 250068 nonzeros Presolve time: 0.24s Presolved: 77988 rows, 17508 columns, 250068 nonzeros Variable types: 0 continuous, 17508 integer (17508 binary) Root relaxation: objective 0.000000e+00, 716 iterations, 0.08 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 (1121 simplex iterations) in 0.44 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 -- 91 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 02:21:12 2012 Optimize a model with 38658 rows, 9090 columns and 123660 nonzeros Presolve time: 0.15s Presolved: 38658 rows, 9090 columns, 123660 nonzeros Variable types: 0 continuous, 9090 integer (9090 binary) Root relaxation: objective 0.000000e+00, 488 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 (866 simplex iterations) in 0.23 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 -- 45 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 02:21:12 2012 Optimize a model with 18993 rows, 4881 columns and 60456 nonzeros Presolve time: 0.07s Presolved: 18993 rows, 4881 columns, 60456 nonzeros Variable types: 0 continuous, 4881 integer (4881 binary) Root relaxation: objective 0.000000e+00, 390 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 (720 simplex iterations) in 0.11 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 -- 22 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 02:21:13 2012 Optimize a model with 9588 rows, 2868 columns and 30228 nonzeros Presolve time: 0.03s Presolved: 9588 rows, 2868 columns, 30228 nonzeros Variable types: 0 continuous, 2868 integer (2868 binary) Root relaxation: objective 0.000000e+00, 390 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 (732 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 -- 11 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 02:21:13 2012 Optimize a model with 4458 rows, 1770 columns and 13740 nonzeros Presolve time: 0.01s Presolved: 4458 rows, 1770 columns, 13740 nonzeros Variable types: 0 continuous, 1770 integer (1770 binary) Root relaxation: objective 0.000000e+00, 420 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 0 245 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (4077 simplex iterations) in 0.31 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 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 02:21:13 2012 Optimize a model with 1893 rows, 1221 columns and 5496 nonzeros Presolve removed 183 rows and 183 columns Presolve time: 0.00s Presolved: 1710 rows, 1038 columns, 5130 nonzeros Variable types: 0 continuous, 1038 integer (1038 binary) Root relaxation: objective 0.000000e+00, 188 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 0 183 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (792 simplex iterations) in 0.02 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: 2 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 02:21:13 2012 Optimize a model with 2748 rows, 1404 columns and 8244 nonzeros Presolve time: 0.01s Presolved: 2748 rows, 1404 columns, 8244 nonzeros Variable types: 0 continuous, 1404 integer (1404 binary) Root relaxation: objective 0.000000e+00, 415 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 0 360 - 0.00000 - - 0s 0 0 0.00000 0 360 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (4804 simplex iterations) in 0.61 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 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 02:21:14 2012 Optimize a model with 3603 rows, 1587 columns and 10992 nonzeros Presolve time: 0.01s Presolved: 3603 rows, 1587 columns, 10992 nonzeros Variable types: 0 continuous, 1587 integer (1587 binary) Root relaxation: objective 0.000000e+00, 405 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 0 346 - 0.00000 - - 0s 0 0 0.00000 0 330 - 0.00000 - - 0s 0 0 0.00000 0 348 - 0.00000 - - 0s 0 0 0.00000 0 358 - 0.00000 - - 0s 0 0 0.00000 0 320 - 0.00000 - - 1s 0 0 0.00000 0 318 - 0.00000 - - 1s 0 0 0.00000 0 314 - 0.00000 - - 2s 0 0 0.00000 0 310 - 0.00000 - - 2s 0 0 0.00000 0 298 - 0.00000 - - 3s 0 0 0.00000 0 296 - 0.00000 - - 3s 0 0 0.00000 0 278 - 0.00000 - - 3s 0 0 0.00000 0 280 - 0.00000 - - 4s 0 0 0.00000 0 272 - 0.00000 - - 4s 0 0 0.00000 0 276 - 0.00000 - - 5s 0 0 0.00000 0 268 - 0.00000 - - 5s 0 0 0.00000 0 276 - 0.00000 - - 6s 0 0 0.00000 0 270 - 0.00000 - - 6s 0 0 0.00000 0 244 - 0.00000 - - 7s 0 0 0.00000 0 352 - 0.00000 - - 7s 0 0 0.00000 0 287 - 0.00000 - - 8s 0 2 0.00000 0 286 - 0.00000 - - 8s 86 28 0.00000 14 320 - 0.00000 - 164 10s 704 67 0.00000 15 408 - 0.00000 - 120 15s 707 69 0.00000 11 443 - 0.00000 - 120 21s 712 74 0.00000 14 374 - 0.00000 - 159 25s 951 26 0.00000 24 322 - 0.00000 - 182 30s 1175 40 infeasible 27 - 0.00000 - 197 35s 1404 57 0.00000 27 314 - 0.00000 - 208 40s 1652 51 infeasible 25 - 0.00000 - 216 45s 1863 50 infeasible 28 - 0.00000 - 223 50s 2086 31 0.00000 23 420 - 0.00000 - 229 55s 2291 20 infeasible 28 - 0.00000 - 234 60s 2523 36 infeasible 34 - 0.00000 - 236 65s 2762 33 0.00000 30 395 - 0.00000 - 239 70s 2968 27 0.00000 23 384 - 0.00000 - 243 75s 3243 48 infeasible 28 - 0.00000 - 242 80s 3483 24 infeasible 28 - 0.00000 - 243 85s 3670 13 infeasible 24 - 0.00000 - 246 90s Cutting planes: Gomory: 4 Clique: 2 Zero half: 8 Explored 3790 nodes (1006433 simplex iterations) in 93.01 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