current bounds on the number of colors: 0 -- 119 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:52:25 2012 Optimize a model with 41655 rows, 7725 columns and 131629 nonzeros Presolve time: 0.16s Presolved: 41655 rows, 7725 columns, 131629 nonzeros Variable types: 0 continuous, 7725 integer (7725 binary) Root relaxation: objective 0.000000e+00, 309 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 (569 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 -- 59 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:52:26 2012 Optimize a model with 20535 rows, 4155 columns and 64699 nonzeros Presolve time: 0.09s Presolved: 20535 rows, 4155 columns, 64699 nonzeros Variable types: 0 continuous, 4155 integer (4155 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (496 simplex iterations) in 0.12 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 -- 29 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:52:27 2012 Optimize a model with 9975 rows, 2370 columns and 31234 nonzeros Presolve time: 0.03s Presolved: 9975 rows, 2370 columns, 31234 nonzeros Variable types: 0 continuous, 2370 integer (2370 binary) Root relaxation: objective 0.000000e+00, 246 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 (482 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 -- 14 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:52:27 2012 Optimize a model with 5047 rows, 1537 columns and 15617 nonzeros Presolve time: 0.01s Presolved: 5047 rows, 1537 columns, 15617 nonzeros Variable types: 0 continuous, 1537 integer (1537 binary) Root relaxation: objective 0.000000e+00, 252 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 (815 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 -- 7 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:52:27 2012 Optimize a model with 2231 rows, 1061 columns and 6693 nonzeros Presolve time: 0.01s Presolved: 2231 rows, 1061 columns, 6693 nonzeros Variable types: 0 continuous, 1061 integer (1061 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 0.00000 0 190 - 0.00000 - - 0s 0 0 0.00000 0 236 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (4902 simplex iterations) in 0.45 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 20:52:27 2012 Optimize a model with 3639 rows, 1299 columns and 11155 nonzeros Presolve time: 0.01s Presolved: 3639 rows, 1299 columns, 11155 nonzeros Variable types: 0 continuous, 1299 integer (1299 binary) Root relaxation: objective 0.000000e+00, 250 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 0 170 - 0.00000 - - 0s 0 0 0.00000 0 246 - 0.00000 - - 0s 0 0 0.00000 0 202 - 0.00000 - - 0s 0 0 0.00000 0 287 - 0.00000 - - 0s 0 0 0.00000 0 261 - 0.00000 - - 1s 0 0 0.00000 0 308 - 0.00000 - - 1s 0 0 0.00000 0 259 - 0.00000 - - 2s 0 0 0.00000 0 286 - 0.00000 - - 2s 0 0 0.00000 0 330 - 0.00000 - - 3s 0 0 0.00000 0 330 - 0.00000 - - 3s 0 2 0.00000 0 260 - 0.00000 - - 3s 368 67 infeasible 27 - 0.00000 - 74.5 5s 610 105 0.00000 27 148 - 0.00000 - 67.5 10s 623 114 0.00000 15 266 - 0.00000 - 131 15s 1091 57 infeasible 34 - 0.00000 - 144 20s * 1500 2 34 0.0000000 0.00000 0.0% 146 23s Cutting planes: Clique: 3 Zero half: 1 Explored 1501 nodes (246713 simplex iterations) in 23.29 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 20:52:51 2012 Optimize a model with 2935 rows, 1180 columns and 8924 nonzeros Presolve time: 0.01s Presolved: 2935 rows, 1180 columns, 8924 nonzeros Variable types: 0 continuous, 1180 integer (1180 binary) Root relaxation: objective 0.000000e+00, 264 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 0 236 - 0.00000 - - 0s 0 0 0.00000 0 234 - 0.00000 - - 0s 0 0 0.00000 0 326 - 0.00000 - - 0s 0 0 0.00000 0 336 - 0.00000 - - 0s 0 0 0.00000 0 331 - 0.00000 - - 1s 0 0 0.00000 0 324 - 0.00000 - - 1s 0 0 0.00000 0 270 - 0.00000 - - 2s 0 0 0.00000 0 320 - 0.00000 - - 2s 0 0 0.00000 0 255 - 0.00000 - - 3s 0 0 0.00000 0 261 - 0.00000 - - 4s 0 0 0.00000 0 338 - 0.00000 - - 4s 0 0 0.00000 0 316 - 0.00000 - - 4s 0 2 0.00000 0 316 - 0.00000 - - 5s 242 12 infeasible 8 - 0.00000 - 204 10s Cutting planes: Clique: 24 Zero half: 99 Explored 353 nodes (103569 simplex iterations) in 11.87 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