current bounds on the number of colors: 0 -- 165 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:22:19 2012 Optimize a model with 11645 rows, 13670 columns and 47970 nonzeros Presolve removed 31 rows and 2542 columns Presolve time: 0.12s Presolved: 11614 rows, 11128 columns, 45428 nonzeros Variable types: 0 continuous, 11128 integer (11128 binary) Root relaxation: objective 0.000000e+00, 250 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 (250 simplex iterations) in 0.13 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 -- 82 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:22:19 2012 Optimize a model with 5905 rows, 6905 columns and 23985 nonzeros Presolve removed 31 rows and 1271 columns Presolve time: 0.05s Presolved: 5874 rows, 5634 columns, 22714 nonzeros Variable types: 0 continuous, 5634 integer (5634 binary) Root relaxation: objective 0.000000e+00, 247 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 (247 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 -- 41 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:22:19 2012 Optimize a model with 2965 rows, 3440 columns and 11700 nonzeros Presolve removed 31 rows and 620 columns Presolve time: 0.02s Presolved: 2934 rows, 2820 columns, 11080 nonzeros Variable types: 0 continuous, 2820 integer (2820 binary) Root relaxation: objective 0.000000e+00, 247 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 (247 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 -- 20 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:22:19 2012 Optimize a model with 1565 rows, 1790 columns and 5850 nonzeros Presolve removed 31 rows and 310 columns Presolve time: 0.01s Presolved: 1534 rows, 1480 columns, 5540 nonzeros Variable types: 0 continuous, 1480 integer (1480 binary) Root relaxation: objective 0.000000e+00, 233 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 (336 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 16:22:19 2012 Optimize a model with 865 rows, 965 columns and 2925 nonzeros Presolve removed 31 rows and 155 columns Presolve time: 0.00s Presolved: 834 rows, 810 columns, 2770 nonzeros Variable types: 0 continuous, 810 integer (810 binary) Root relaxation: objective 0.000000e+00, 223 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 (223 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 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:22:19 2012 Optimize a model with 445 rows, 470 columns and 1170 nonzeros Presolve removed 173 rows and 208 columns Presolve time: 0.00s Presolved: 272 rows, 262 columns, 816 nonzeros Variable types: 0 continuous, 262 integer (262 binary) Root relaxation: objective 0.000000e+00, 126 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 0 107 - 0.00000 - - 0s Explored 0 nodes (436 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 16:22:19 2012 Optimize a model with 585 rows, 635 columns and 1755 nonzeros Presolve removed 31 rows and 93 columns Presolve time: 0.00s Presolved: 554 rows, 542 columns, 1662 nonzeros Variable types: 0 continuous, 542 integer (542 binary) Root relaxation: objective 0.000000e+00, 214 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 (214 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