current bounds on the number of colors: 0 -- 170 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:08 2012 Optimize a model with 12665 rows, 14597 columns and 51935 nonzeros Presolve removed 26 rows and 2210 columns Presolve time: 0.12s Presolved: 12639 rows, 12387 columns, 49725 nonzeros Variable types: 0 continuous, 12387 integer (12387 binary) Root relaxation: objective 0.000000e+00, 247 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 (247 simplex iterations) in 0.14 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 -- 85 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:08 2012 Optimize a model with 6344 rows, 7287 columns and 25662 nonzeros Presolve removed 26 rows and 1092 columns Presolve time: 0.06s Presolved: 6318 rows, 6195 columns, 24570 nonzeros Variable types: 0 continuous, 6195 integer (6195 binary) Root relaxation: objective 0.000000e+00, 251 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 (251 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 -- 42 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:08 2012 Optimize a model with 3257 rows, 3717 columns and 12831 nonzeros Presolve removed 26 rows and 546 columns Presolve time: 0.02s Presolved: 3231 rows, 3171 columns, 12285 nonzeros Variable types: 0 continuous, 3171 integer (3171 binary) Root relaxation: objective 0.000000e+00, 251 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 (251 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 -- 21 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:09 2012 Optimize a model with 1640 rows, 1847 columns and 6110 nonzeros Presolve removed 26 rows and 260 columns Presolve time: 0.01s Presolved: 1614 rows, 1587 columns, 5850 nonzeros Variable types: 0 continuous, 1587 integer (1587 binary) Root relaxation: objective 0.000000e+00, 258 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 (258 simplex iterations) in 0.01 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% current bounds on the number of colors: 0 -- 10 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:09 2012 Optimize a model with 905 rows, 997 columns and 3055 nonzeros Presolve removed 26 rows and 130 columns Presolve time: 0.00s Presolved: 879 rows, 867 columns, 2925 nonzeros Variable types: 0 continuous, 867 integer (867 binary) Root relaxation: objective 0.000000e+00, 245 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 (350 simplex iterations) in 0.01 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% current bounds on the number of colors: 0 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:09 2012 Optimize a model with 464 rows, 487 columns and 1222 nonzeros Presolve removed 178 rows and 208 columns Presolve time: 0.00s Presolved: 286 rows, 279 columns, 858 nonzeros Variable types: 0 continuous, 279 integer (279 binary) Root relaxation: objective 0.000000e+00, 147 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 0 106 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (432 simplex iterations) in 0.00 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 Sat Dec 15 16:23:09 2012 Optimize a model with 611 rows, 657 columns and 1833 nonzeros Presolve removed 26 rows and 78 columns Presolve time: 0.00s Presolved: 585 rows, 579 columns, 1755 nonzeros Variable types: 0 continuous, 579 integer (579 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 (226 simplex iterations) in 0.00 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: 3