current bounds on the number of colors: 0 -- 151 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:49:21 2012 Optimize a model with 46126 rows, 11938 columns and 149250 nonzeros Presolve time: 0.16s Presolved: 46126 rows, 11938 columns, 149250 nonzeros Variable types: 0 continuous, 11938 integer (11938 binary) Root relaxation: objective 0.000000e+00, 552 iterations, 0.04 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 (893 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% current bounds on the number of colors: 0 -- 75 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:49:22 2012 Optimize a model with 22832 rows, 6200 columns and 73630 nonzeros Presolve time: 0.12s Presolved: 22832 rows, 6200 columns, 73630 nonzeros Variable types: 0 continuous, 6200 integer (6200 binary) Root relaxation: objective 0.000000e+00, 433 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 (752 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 -- 37 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:49:22 2012 Optimize a model with 11185 rows, 3331 columns and 35820 nonzeros Presolve time: 0.04s Presolved: 11185 rows, 3331 columns, 35820 nonzeros Variable types: 0 continuous, 3331 integer (3331 binary) Root relaxation: objective 0.000000e+00, 314 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 (575 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 -- 18 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:49:22 2012 Optimize a model with 5668 rows, 1972 columns and 17910 nonzeros Presolve time: 0.02s Presolved: 5668 rows, 1972 columns, 17910 nonzeros Variable types: 0 continuous, 1972 integer (1972 binary) Root relaxation: objective 0.000000e+00, 321 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 (593 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 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:49:22 2012 Optimize a model with 2603 rows, 1217 columns and 7960 nonzeros Presolve time: 0.01s Presolved: 2603 rows, 1217 columns, 7960 nonzeros Variable types: 0 continuous, 1217 integer (1217 binary) Root relaxation: objective 0.000000e+00, 362 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 0 288 - 0.00000 - - 0s 0 0 0.00000 0 282 - 0.00000 - - 0s 0 0 0.00000 0 232 - 0.00000 - - 0s 0 0 0.00000 0 232 - 0.00000 - - 0s 0 0 0.00000 0 259 - 0.00000 - - 0s 0 0 0.00000 0 338 - 0.00000 - - 0s 0 0 0.00000 0 376 - 0.00000 - - 1s 0 0 0.00000 0 376 - 0.00000 - - 1s 0 2 0.00000 0 334 - 0.00000 - - 1s 609 144 0.00000 29 298 - 0.00000 - 57.1 5s 614 147 0.00000 25 283 - 0.00000 - 56.6 10s * 724 109 36 0.0000000 0.00000 0.0% 96.4 11s Cutting planes: Gomory: 1 Zero half: 10 Explored 725 nodes (85510 simplex iterations) in 11.65 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:49:34 2012 Optimize a model with 1377 rows, 915 columns and 3980 nonzeros Presolve removed 151 rows and 151 columns Presolve time: 0.00s Presolved: 1226 rows, 764 columns, 3678 nonzeros Variable types: 0 continuous, 764 integer (764 binary) Root relaxation: objective 0.000000e+00, 157 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 0 151 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (668 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:49:34 2012 Optimize a model with 1990 rows, 1066 columns and 5970 nonzeros Presolve time: 0.00s Presolved: 1990 rows, 1066 columns, 5970 nonzeros Variable types: 0 continuous, 1066 integer (1066 binary) Root relaxation: objective 0.000000e+00, 335 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 0 228 - 0.00000 - - 0s 0 0 0.00000 0 300 - 0.00000 - - 0s 0 0 0.00000 0 371 - 0.00000 - - 0s 0 0 0.00000 0 409 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 1 Clique: 2 Zero half: 341 Explored 0 nodes (7915 simplex iterations) in 0.79 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - optimal solution found: number of colors: 4