current bounds on the number of colors: 0 -- 86 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:42:36 2012 Optimize a model with 15781 rows, 4063 columns and 50783 nonzeros Presolve time: 0.09s Presolved: 15781 rows, 4063 columns, 50783 nonzeros Variable types: 0 continuous, 4063 integer (4063 binary) Root relaxation: objective 0.000000e+00, 273 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 (483 simplex iterations) in 0.12 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 -- 43 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:42:36 2012 Optimize a model with 7751 rows, 2171 columns and 24801 nonzeros Presolve time: 0.03s Presolved: 7751 rows, 2171 columns, 24801 nonzeros Variable types: 0 continuous, 2171 integer (2171 binary) Root relaxation: objective 0.000000e+00, 204 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 (376 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% current bounds on the number of colors: 0 -- 21 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:42:37 2012 Optimize a model with 3736 rows, 1225 columns and 11810 nonzeros Presolve time: 0.01s Presolved: 3736 rows, 1225 columns, 11810 nonzeros Variable types: 0 continuous, 1225 integer (1225 binary) Root relaxation: objective 0.000000e+00, 181 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 (340 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 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:42:37 2012 Optimize a model with 1911 rows, 795 columns and 5905 nonzeros Presolve time: 0.00s Presolved: 1911 rows, 795 columns, 5905 nonzeros Variable types: 0 continuous, 795 integer (795 binary) Root relaxation: objective 0.000000e+00, 190 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 24 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1521 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 -- 5 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:42:37 2012 Optimize a model with 816 rows, 537 columns and 2362 nonzeros Presolve removed 86 rows and 86 columns Presolve time: 0.00s Presolved: 730 rows, 451 columns, 2190 nonzeros Variable types: 0 continuous, 451 integer (451 binary) Root relaxation: objective 0.000000e+00, 92 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 86 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (367 simplex iterations) in 0.01 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 Thu Dec 13 19:42:37 2012 Optimize a model with 1181 rows, 623 columns and 3543 nonzeros Presolve time: 0.00s Presolved: 1181 rows, 623 columns, 3543 nonzeros Variable types: 0 continuous, 623 integer (623 binary) Root relaxation: objective 0.000000e+00, 186 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 0 170 - 0.00000 - - 0s 0 0 0.00000 0 170 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1869 simplex iterations) in 0.11 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 Thu Dec 13 19:42:37 2012 Optimize a model with 1546 rows, 709 columns and 4724 nonzeros Presolve time: 0.00s Presolved: 1546 rows, 709 columns, 4724 nonzeros Variable types: 0 continuous, 709 integer (709 binary) Root relaxation: objective 0.000000e+00, 186 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 0 166 - 0.00000 - - 0s 0 0 0.00000 0 175 - 0.00000 - - 0s 0 0 0.00000 0 195 - 0.00000 - - 0s 0 0 0.00000 0 227 - 0.00000 - - 0s 0 0 0.00000 0 197 - 0.00000 - - 0s 0 0 0.00000 0 168 - 0.00000 - - 0s 0 0 0.00000 0 200 - 0.00000 - - 0s 0 0 0.00000 0 210 - 0.00000 - - 0s 0 0 0.00000 0 210 - 0.00000 - - 0s 0 2 0.00000 0 210 - 0.00000 - - 0s * 250 1 8 0.0000000 0.00000 0.0% 62.7 1s Cutting planes: Clique: 4 Zero half: 18 Explored 251 nodes (25511 simplex iterations) in 1.44 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