current bounds on the number of colors: 0 -- 109 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:02:09 2012 Optimize a model with 31105 rows, 6460 columns and 98874 nonzeros Presolve time: 0.15s Presolved: 31105 rows, 6460 columns, 98874 nonzeros Variable types: 0 continuous, 6460 integer (6460 binary) Root relaxation: objective 0.000000e+00, 385 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 (647 simplex iterations) in 0.21 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 -- 54 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:02:10 2012 Optimize a model with 15607 rows, 3517 columns and 49437 nonzeros Presolve time: 0.07s Presolved: 15607 rows, 3517 columns, 49437 nonzeros Variable types: 0 continuous, 3517 integer (3517 binary) Root relaxation: objective 0.000000e+00, 281 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 (512 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 -- 27 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:02:10 2012 Optimize a model with 7571 rows, 1991 columns and 23803 nonzeros Presolve time: 0.02s Presolved: 7571 rows, 1991 columns, 23803 nonzeros Variable types: 0 continuous, 1991 integer (1991 binary) Root relaxation: objective 0.000000e+00, 226 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 (419 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 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:02:10 2012 Optimize a model with 3553 rows, 1228 columns and 10986 nonzeros Presolve time: 0.01s Presolved: 3553 rows, 1228 columns, 10986 nonzeros Variable types: 0 continuous, 1228 integer (1228 binary) Root relaxation: objective 0.000000e+00, 231 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 (832 simplex iterations) in 0.03 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 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:02:10 2012 Optimize a model with 1831 rows, 901 columns and 5493 nonzeros Presolve time: 0.00s Presolved: 1831 rows, 901 columns, 5493 nonzeros Variable types: 0 continuous, 901 integer (901 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 0 176 - 0.00000 - - 0s 0 0 0.00000 0 218 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3277 simplex iterations) in 0.29 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 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:02:11 2012 Optimize a model with 2405 rows, 1010 columns and 7324 nonzeros Presolve time: 0.01s Presolved: 2405 rows, 1010 columns, 7324 nonzeros Variable types: 0 continuous, 1010 integer (1010 binary) Root relaxation: objective 0.000000e+00, 241 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 0 192 - 0.00000 - - 0s 0 0 0.00000 0 239 - 0.00000 - - 0s 0 0 0.00000 0 322 - 0.00000 - - 0s 0 0 0.00000 0 235 - 0.00000 - - 1s 0 0 0.00000 0 243 - 0.00000 - - 1s 0 0 0.00000 0 231 - 0.00000 - - 1s 0 0 0.00000 0 260 - 0.00000 - - 1s 0 0 0.00000 0 286 - 0.00000 - - 2s 0 0 0.00000 0 286 - 0.00000 - - 2s 0 2 0.00000 0 286 - 0.00000 - - 2s Cutting planes: Clique: 4 Zero half: 41 Explored 35 nodes (28325 simplex iterations) in 3.05 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 4 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:02:14 2012 Optimize a model with 2979 rows, 1119 columns and 9155 nonzeros Presolve time: 0.01s Presolved: 2979 rows, 1119 columns, 9155 nonzeros Variable types: 0 continuous, 1119 integer (1119 binary) Root relaxation: objective 0.000000e+00, 230 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 0 208 - 0.00000 - - 0s 0 0 0.00000 0 254 - 0.00000 - - 0s Cutting planes: Clique: 16 Explored 0 nodes (3555 simplex iterations) in 0.26 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: 5