current bounds on the number of colors: 0 -- 130 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:17:31 2012 Optimize a model with 5980 rows, 8540 columns and 26000 nonzeros Presolve removed 28 rows and 1820 columns Presolve time: 0.08s Presolved: 5952 rows, 6720 columns, 24180 nonzeros Variable types: 0 continuous, 6720 integer (6720 binary) Root relaxation: objective 0.000000e+00, 185 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 (261 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 -- 65 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:17:31 2012 Optimize a model with 3010 rows, 4250 columns and 12800 nonzeros Presolve removed 28 rows and 896 columns Presolve time: 0.03s Presolved: 2982 rows, 3354 columns, 11904 nonzeros Variable types: 0 continuous, 3354 integer (3354 binary) Root relaxation: objective 0.000000e+00, 183 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 (262 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 -- 32 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:17:31 2012 Optimize a model with 1570 rows, 2170 columns and 6400 nonzeros Presolve removed 28 rows and 448 columns Presolve time: 0.01s Presolved: 1542 rows, 1722 columns, 5952 nonzeros Variable types: 0 continuous, 1722 integer (1722 binary) Root relaxation: objective 0.000000e+00, 183 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 (263 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 -- 16 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:17:31 2012 Optimize a model with 850 rows, 1130 columns and 3200 nonzeros Presolve removed 28 rows and 224 columns Presolve time: 0.00s Presolved: 822 rows, 906 columns, 2976 nonzeros Variable types: 0 continuous, 906 integer (906 binary) Root relaxation: objective 0.000000e+00, 176 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 (242 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 -- 8 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:17:31 2012 Optimize a model with 490 rows, 610 columns and 1600 nonzeros Presolve removed 28 rows and 112 columns Presolve time: 0.00s Presolved: 462 rows, 498 columns, 1488 nonzeros Variable types: 0 continuous, 498 integer (498 binary) Root relaxation: objective 0.000000e+00, 155 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 (155 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% current bounds on the number of colors: 0 -- 4 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:17:31 2012 Optimize a model with 310 rows, 350 columns and 800 nonzeros Presolve removed 154 rows and 194 columns Presolve time: 0.00s Presolved: 156 rows, 156 columns, 468 nonzeros Variable types: 0 continuous, 156 integer (156 binary) Root relaxation: objective 0.000000e+00, 86 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 69 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (295 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 -- 4 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:17:31 2012 Optimize a model with 400 rows, 480 columns and 1200 nonzeros Presolve removed 28 rows and 84 columns Presolve time: 0.00s Presolved: 372 rows, 396 columns, 1116 nonzeros Variable types: 0 continuous, 396 integer (396 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (147 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