current bounds on the number of colors: 0 -- 162 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:34:34 2012 Optimize a model with 52812 rows, 13772 columns and 171072 nonzeros Presolve time: 0.17s Presolved: 52812 rows, 13772 columns, 171072 nonzeros Variable types: 0 continuous, 13772 integer (13772 binary) Root relaxation: objective 0.000000e+00, 586 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 (901 simplex iterations) in 0.30 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 -- 81 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:34:35 2012 Optimize a model with 26162 rows, 7130 columns and 84480 nonzeros Presolve time: 0.13s Presolved: 26162 rows, 7130 columns, 84480 nonzeros Variable types: 0 continuous, 7130 integer (7130 binary) Root relaxation: objective 0.000000e+00, 411 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 (705 simplex iterations) in 0.18 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 -- 40 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:34:36 2012 Optimize a model with 13162 rows, 3890 columns and 42240 nonzeros Presolve time: 0.05s Presolved: 13162 rows, 3890 columns, 42240 nonzeros Variable types: 0 continuous, 3890 integer (3890 binary) Root relaxation: objective 0.000000e+00, 326 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 (614 simplex iterations) in 0.08 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 -- 20 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:34:36 2012 Optimize a model with 6662 rows, 2270 columns and 21120 nonzeros Presolve time: 0.02s Presolved: 6662 rows, 2270 columns, 21120 nonzeros Variable types: 0 continuous, 2270 integer (2270 binary) Root relaxation: objective 0.000000e+00, 347 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 (600 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 19:34:36 2012 Optimize a model with 3412 rows, 1460 columns and 10560 nonzeros Presolve time: 0.01s Presolved: 3412 rows, 1460 columns, 10560 nonzeros Variable types: 0 continuous, 1460 integer (1460 binary) Root relaxation: objective 0.000000e+00, 359 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 (2259 simplex iterations) in 0.08 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 19:34:36 2012 Optimize a model with 1462 rows, 974 columns and 4224 nonzeros Presolve removed 162 rows and 162 columns Presolve time: 0.00s Presolved: 1300 rows, 812 columns, 3900 nonzeros Variable types: 0 continuous, 812 integer (812 binary) Root relaxation: objective 0.000000e+00, 175 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 0 162 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (701 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 19:34:36 2012 Optimize a model with 2112 rows, 1136 columns and 6336 nonzeros Presolve time: 0.01s Presolved: 2112 rows, 1136 columns, 6336 nonzeros Variable types: 0 continuous, 1136 integer (1136 binary) Root relaxation: objective 0.000000e+00, 368 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 0 324 - 0.00000 - - 0s 0 0 0.00000 0 328 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (4231 simplex iterations) in 0.34 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 19:34:37 2012 Optimize a model with 2762 rows, 1298 columns and 8448 nonzeros Presolve time: 0.01s Presolved: 2762 rows, 1298 columns, 8448 nonzeros Variable types: 0 continuous, 1298 integer (1298 binary) Root relaxation: objective 0.000000e+00, 360 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 0 279 - 0.00000 - - 0s 0 0 0.00000 0 242 - 0.00000 - - 0s 0 0 0.00000 0 286 - 0.00000 - - 0s 0 0 0.00000 0 339 - 0.00000 - - 0s 0 0 0.00000 0 283 - 0.00000 - - 1s 0 0 0.00000 0 281 - 0.00000 - - 1s 0 0 0.00000 0 325 - 0.00000 - - 1s 0 0 0.00000 0 192 - 0.00000 - - 2s 0 0 0.00000 0 257 - 0.00000 - - 2s 0 0 0.00000 0 356 - 0.00000 - - 2s 0 0 0.00000 0 327 - 0.00000 - - 3s 0 2 0.00000 0 323 - 0.00000 - - 3s 396 63 0.00000 16 216 - 0.00000 - 92.4 5s 807 77 0.00000 14 274 - 0.00000 - 87.3 10s * 896 52 26 0.0000000 0.00000 0.0% 120 15s Cutting planes: Clique: 2 Zero half: 3 Explored 897 nodes (136931 simplex iterations) in 15.01 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