current bounds on the number of colors: 0 -- 169 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:58:47 2012 Optimize a model with 59725 rows, 14905 columns and 192864 nonzeros Presolve time: 0.18s Presolved: 59725 rows, 14905 columns, 192864 nonzeros Variable types: 0 continuous, 14905 integer (14905 binary) Root relaxation: objective 0.000000e+00, 681 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 (1069 simplex iterations) in 0.34 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 -- 84 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:58:48 2012 Optimize a model with 29947 rows, 7807 columns and 96432 nonzeros Presolve time: 0.14s Presolved: 29947 rows, 7807 columns, 96432 nonzeros Variable types: 0 continuous, 7807 integer (7807 binary) Root relaxation: objective 0.000000e+00, 461 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 (778 simplex iterations) in 0.20 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 -- 42 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:58:48 2012 Optimize a model with 15058 rows, 4258 columns and 48216 nonzeros Presolve time: 0.06s Presolved: 15058 rows, 4258 columns, 48216 nonzeros Variable types: 0 continuous, 4258 integer (4258 binary) Root relaxation: objective 0.000000e+00, 353 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 (671 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 20:58:49 2012 Optimize a model with 7259 rows, 2399 columns and 22960 nonzeros Presolve time: 0.02s Presolved: 7259 rows, 2399 columns, 22960 nonzeros Variable types: 0 continuous, 2399 integer (2399 binary) Root relaxation: objective 0.000000e+00, 355 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 (638 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 20:58:49 2012 Optimize a model with 3714 rows, 1554 columns and 11480 nonzeros Presolve time: 0.01s Presolved: 3714 rows, 1554 columns, 11480 nonzeros Variable types: 0 continuous, 1554 integer (1554 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 0.00000 0 114 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (2937 simplex iterations) in 0.16 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 20:58:49 2012 Optimize a model with 1587 rows, 1047 columns and 4592 nonzeros Presolve removed 169 rows and 169 columns Presolve time: 0.00s Presolved: 1418 rows, 878 columns, 4254 nonzeros Variable types: 0 continuous, 878 integer (878 binary) Root relaxation: objective 0.000000e+00, 177 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 0 169 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (719 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 20:58:49 2012 Optimize a model with 2296 rows, 1216 columns and 6888 nonzeros Presolve time: 0.01s Presolved: 2296 rows, 1216 columns, 6888 nonzeros Variable types: 0 continuous, 1216 integer (1216 binary) Root relaxation: objective 0.000000e+00, 369 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 0 332 - 0.00000 - - 0s 0 0 0.00000 0 334 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3815 simplex iterations) in 0.38 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 20:58:49 2012 Optimize a model with 3005 rows, 1385 columns and 9184 nonzeros Presolve time: 0.01s Presolved: 3005 rows, 1385 columns, 9184 nonzeros Variable types: 0 continuous, 1385 integer (1385 binary) Root relaxation: objective 0.000000e+00, 399 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 0 304 - 0.00000 - - 0s 0 0 0.00000 0 310 - 0.00000 - - 0s 0 0 0.00000 0 324 - 0.00000 - - 0s 0 0 0.00000 0 334 - 0.00000 - - 0s 0 0 0.00000 0 292 - 0.00000 - - 0s 0 0 0.00000 0 278 - 0.00000 - - 1s 0 0 0.00000 0 284 - 0.00000 - - 1s 0 0 0.00000 0 280 - 0.00000 - - 1s 0 0 0.00000 0 282 - 0.00000 - - 1s 0 0 0.00000 0 280 - 0.00000 - - 1s 0 0 0.00000 0 270 - 0.00000 - - 2s 0 0 0.00000 0 268 - 0.00000 - - 2s 0 0 0.00000 0 258 - 0.00000 - - 2s 0 0 0.00000 0 251 - 0.00000 - - 2s 0 0 0.00000 0 222 - 0.00000 - - 3s 0 0 0.00000 0 220 - 0.00000 - - 3s 0 0 0.00000 0 202 - 0.00000 - - 3s 0 0 0.00000 0 214 - 0.00000 - - 3s 0 0 0.00000 0 200 - 0.00000 - - 3s 0 2 0.00000 0 200 - 0.00000 - - 4s 176 33 infeasible 17 - 0.00000 - 87.6 5s 608 113 0.00000 13 361 - 0.00000 - 79.0 10s 630 125 0.00000 19 282 - 0.00000 - 123 15s * 759 64 27 0.0000000 0.00000 0.0% 128 16s Cutting planes: Gomory: 1 Zero half: 15 Explored 760 nodes (142639 simplex iterations) in 16.02 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