current bounds on the number of colors: 0 -- 123 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:31:29 2012 Optimize a model with 23852 rows, 7892 columns and 78690 nonzeros Presolve time: 0.12s Presolved: 23852 rows, 7892 columns, 78690 nonzeros Variable types: 0 continuous, 7892 integer (7892 binary) Root relaxation: objective 0.000000e+00, 324 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 (324 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 -- 61 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:31:29 2012 Optimize a model with 11793 rows, 4079 columns and 38700 nonzeros Presolve time: 0.06s Presolved: 11793 rows, 4079 columns, 38700 nonzeros Variable types: 0 continuous, 4079 integer (4079 binary) Root relaxation: objective 0.000000e+00, 354 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 (675 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 -- 30 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:31:30 2012 Optimize a model with 5958 rows, 2234 columns and 19350 nonzeros Presolve time: 0.02s Presolved: 5958 rows, 2234 columns, 19350 nonzeros Variable types: 0 continuous, 2234 integer (2234 binary) Root relaxation: objective 0.000000e+00, 255 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 (448 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 -- 15 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:31:30 2012 Optimize a model with 2846 rows, 1250 columns and 9030 nonzeros Presolve time: 0.01s Presolved: 2846 rows, 1250 columns, 9030 nonzeros Variable types: 0 continuous, 1250 integer (1250 binary) Root relaxation: objective 0.000000e+00, 290 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 (542 simplex iterations) in 0.02 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% current bounds on the number of colors: 0 -- 7 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:31:30 2012 Optimize a model with 1290 rows, 758 columns and 3870 nonzeros Presolve time: 0.00s Presolved: 1290 rows, 758 columns, 3870 nonzeros Variable types: 0 continuous, 758 integer (758 binary) Root relaxation: objective 0.000000e+00, 294 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 0 238 - 0.00000 - - 0s 0 0 0.00000 0 228 - 0.00000 - - 0s 0 0 0.00000 0 276 - 0.00000 - - 0s 0 0 0.00000 0 228 - 0.00000 - - 0s 0 0 0.00000 0 260 - 0.00000 - - 0s 0 0 0.00000 0 220 - 0.00000 - - 0s 0 0 0.00000 0 242 - 0.00000 - - 0s 0 0 0.00000 0 245 - 0.00000 - - 0s 0 0 0.00000 0 245 - 0.00000 - - 0s 0 2 0.00000 0 245 - 0.00000 - - 0s Cutting planes: Zero half: 8 Explored 3 nodes (11393 simplex iterations) in 0.82 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: 3 -- 7 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:31:31 2012 Optimize a model with 2068 rows, 1004 columns and 6450 nonzeros Presolve time: 0.01s Presolved: 2068 rows, 1004 columns, 6450 nonzeros Variable types: 0 continuous, 1004 integer (1004 binary) Root relaxation: objective 0.000000e+00, 288 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 (724 simplex iterations) in 0.02 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% current bounds on the number of colors: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:31:31 2012 Optimize a model with 1679 rows, 881 columns and 5160 nonzeros Presolve time: 0.00s Presolved: 1679 rows, 881 columns, 5160 nonzeros Variable types: 0 continuous, 881 integer (881 binary) Root relaxation: objective 0.000000e+00, 306 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 62 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1632 simplex iterations) in 0.05 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