current bounds on the number of colors: 0 -- 172 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:48:50 2012 Optimize a model with 63382 rows, 15527 columns and 204422 nonzeros Presolve time: 0.19s Presolved: 63382 rows, 15527 columns, 204422 nonzeros Variable types: 0 continuous, 15527 integer (15527 binary) Root relaxation: objective 0.000000e+00, 696 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 (1098 simplex iterations) in 0.35 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 -- 86 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:48:51 2012 Optimize a model with 31777 rows, 8131 columns and 102211 nonzeros Presolve time: 0.14s Presolved: 31777 rows, 8131 columns, 102211 nonzeros Variable types: 0 continuous, 8131 integer (8131 binary) Root relaxation: objective 0.000000e+00, 561 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 (956 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 -- 43 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:48:52 2012 Optimize a model with 15607 rows, 4347 columns and 49917 nonzeros Presolve time: 0.06s Presolved: 15607 rows, 4347 columns, 49917 nonzeros Variable types: 0 continuous, 4347 integer (4347 binary) Root relaxation: objective 0.000000e+00, 367 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 (658 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 -- 21 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:48:52 2012 Optimize a model with 7522 rows, 2455 columns and 23770 nonzeros Presolve time: 0.02s Presolved: 7522 rows, 2455 columns, 23770 nonzeros Variable types: 0 continuous, 2455 integer (2455 binary) Root relaxation: objective 0.000000e+00, 366 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 (688 simplex iterations) in 0.04 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 -- 10 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:48:53 2012 Optimize a model with 3847 rows, 1595 columns and 11885 nonzeros Presolve time: 0.01s Presolved: 3847 rows, 1595 columns, 11885 nonzeros Variable types: 0 continuous, 1595 integer (1595 binary) Root relaxation: objective 0.000000e+00, 383 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 (2072 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:48:53 2012 Optimize a model with 1642 rows, 1079 columns and 4754 nonzeros Presolve removed 172 rows and 172 columns Presolve time: 0.00s Presolved: 1470 rows, 907 columns, 4410 nonzeros Variable types: 0 continuous, 907 integer (907 binary) Root relaxation: objective 0.000000e+00, 183 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 0 172 - 0.00000 - - 0s Explored 0 nodes (729 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 Fri Dec 14 21:48:53 2012 Optimize a model with 2377 rows, 1251 columns and 7131 nonzeros Presolve time: 0.01s Presolved: 2377 rows, 1251 columns, 7131 nonzeros Variable types: 0 continuous, 1251 integer (1251 binary) Root relaxation: objective 0.000000e+00, 407 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 0 336 - 0.00000 - - 0s 0 0 0.00000 0 334 - 0.00000 - - 0s 0 0 0.00000 0 424 - 0.00000 - - 0s 0 0 0.00000 0 476 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 1 Zero half: 551 Explored 0 nodes (7215 simplex iterations) in 0.93 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 Fri Dec 14 21:48:54 2012 Optimize a model with 3112 rows, 1423 columns and 9508 nonzeros Presolve time: 0.01s Presolved: 3112 rows, 1423 columns, 9508 nonzeros Variable types: 0 continuous, 1423 integer (1423 binary) Root relaxation: objective 0.000000e+00, 389 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 0 332 - 0.00000 - - 0s 0 0 0.00000 0 324 - 0.00000 - - 0s 0 0 0.00000 0 326 - 0.00000 - - 0s 0 0 0.00000 0 367 - 0.00000 - - 0s 0 0 0.00000 0 391 - 0.00000 - - 1s 0 0 0.00000 0 382 - 0.00000 - - 1s 0 0 0.00000 0 405 - 0.00000 - - 1s 0 0 0.00000 0 405 - 0.00000 - - 2s 0 2 0.00000 0 405 - 0.00000 - - 2s 703 46 0.00000 13 326 - 0.00000 - 72.4 5s 712 52 0.00000 10 198 - 0.00000 - 71.5 10s 718 56 0.00000 10 225 - 0.00000 - 70.9 15s 1051 115 0.00000 24 311 - 0.00000 - 136 20s 1669 133 0.00000 21 280 - 0.00000 - 142 25s 2285 141 infeasible 32 - 0.00000 - 145 30s 2891 153 0.00000 27 346 - 0.00000 - 148 35s 3522 124 0.00000 25 286 - 0.00000 - 149 40s 4138 172 infeasible 29 - 0.00000 - 149 45s 4763 179 infeasible 31 - 0.00000 - 150 50s 5430 194 infeasible 30 - 0.00000 - 151 55s 6039 165 infeasible 27 - 0.00000 - 152 60s 6636 166 infeasible 26 - 0.00000 - 154 65s * 7275 2 28 0.0000000 0.00000 0.0% 153 69s Cutting planes: Gomory: 1 Zero half: 10 Explored 7276 nodes (1128773 simplex iterations) in 69.49 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: 4