current bounds on the number of colors: 0 -- 123 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:47:38 2012 Optimize a model with 46178 rows, 8258 columns and 145668 nonzeros Presolve time: 0.16s Presolved: 46178 rows, 8258 columns, 145668 nonzeros Variable types: 0 continuous, 8258 integer (8258 binary) Root relaxation: objective 0.000000e+00, 328 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 (601 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 -- 61 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:47:39 2012 Optimize a model with 22773 rows, 4445 columns and 71640 nonzeros Presolve time: 0.10s Presolved: 22773 rows, 4445 columns, 71640 nonzeros Variable types: 0 continuous, 4445 integer (4445 binary) Root relaxation: objective 0.000000e+00, 300 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 (545 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 -- 30 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:47:39 2012 Optimize a model with 11448 rows, 2600 columns and 35820 nonzeros Presolve time: 0.04s Presolved: 11448 rows, 2600 columns, 35820 nonzeros Variable types: 0 continuous, 2600 integer (2600 binary) Root relaxation: objective 0.000000e+00, 247 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 (479 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 21:47:39 2012 Optimize a model with 5408 rows, 1616 columns and 16716 nonzeros Presolve time: 0.01s Presolved: 5408 rows, 1616 columns, 16716 nonzeros Variable types: 0 continuous, 1616 integer (1616 binary) Root relaxation: objective 0.000000e+00, 258 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 (1549 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 -- 7 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:47:39 2012 Optimize a model with 2388 rows, 1124 columns and 7164 nonzeros Presolve time: 0.01s Presolved: 2388 rows, 1124 columns, 7164 nonzeros Variable types: 0 continuous, 1124 integer (1124 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 0 214 - 0.00000 - - 0s 0 0 0.00000 0 242 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3972 simplex iterations) in 0.40 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 21:47:40 2012 Optimize a model with 3898 rows, 1370 columns and 11940 nonzeros Presolve time: 0.01s Presolved: 3898 rows, 1370 columns, 11940 nonzeros Variable types: 0 continuous, 1370 integer (1370 binary) Root relaxation: objective 0.000000e+00, 254 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 0 240 - 0.00000 - - 0s 0 0 0.00000 0 222 - 0.00000 - - 0s 0 0 0.00000 0 212 - 0.00000 - - 0s 0 0 0.00000 0 287 - 0.00000 - - 0s 0 0 0.00000 0 202 - 0.00000 - - 1s 0 0 0.00000 0 204 - 0.00000 - - 1s 0 0 0.00000 0 204 - 0.00000 - - 1s 0 0 0.00000 0 178 - 0.00000 - - 2s 0 0 0.00000 0 176 - 0.00000 - - 2s 0 0 0.00000 0 176 - 0.00000 - - 2s 0 0 0.00000 0 344 - 0.00000 - - 3s 0 0 0.00000 0 344 - 0.00000 - - 3s 0 2 0.00000 0 344 - 0.00000 - - 4s 81 35 0.00000 20 202 - 0.00000 - 118 5s 1105 47 0.00000 22 182 - 0.00000 - 72.6 10s 1111 51 0.00000 21 308 - 0.00000 - 72.2 15s 1320 64 0.00000 31 186 - 0.00000 - 115 20s 1761 95 infeasible 35 - 0.00000 - 132 25s 2146 130 0.00000 27 200 - 0.00000 - 145 30s 2580 154 infeasible 34 - 0.00000 - 151 35s * 2833 0 26 0.0000000 0.00000 0.0% 155 38s Cutting planes: Gomory: 1 Clique: 1 Zero half: 17 Explored 2834 nodes (471173 simplex iterations) in 38.41 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 21:48:18 2012 Optimize a model with 3143 rows, 1247 columns and 9552 nonzeros Presolve time: 0.01s Presolved: 3143 rows, 1247 columns, 9552 nonzeros Variable types: 0 continuous, 1247 integer (1247 binary) Root relaxation: objective 0.000000e+00, 256 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 0 242 - 0.00000 - - 0s 0 0 0.00000 0 220 - 0.00000 - - 0s 0 0 0.00000 0 272 - 0.00000 - - 1s 0 0 0.00000 0 383 - 0.00000 - - 1s 0 0 0.00000 0 347 - 0.00000 - - 2s 0 0 0.00000 0 338 - 0.00000 - - 2s 0 0 0.00000 0 346 - 0.00000 - - 3s 0 0 0.00000 0 361 - 0.00000 - - 3s 0 0 0.00000 0 351 - 0.00000 - - 4s 0 0 0.00000 0 355 - 0.00000 - - 4s 0 0 0.00000 0 351 - 0.00000 - - 5s 0 2 0.00000 0 351 - 0.00000 - - 5s Cutting planes: Clique: 6 Zero half: 19 Explored 29 nodes (38598 simplex iterations) in 6.57 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