current bounds on the number of colors: 0 -- 111 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:50 2012 Optimize a model with 3686 rows, 6170 columns and 16830 nonzeros Presolve removed 35 rows and 1925 columns Presolve time: 0.04s Presolved: 3651 rows, 4245 columns, 14905 nonzeros Variable types: 0 continuous, 4245 integer (4245 binary) Root relaxation: objective 0.000000e+00, 123 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 (123 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 -- 55 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:50 2012 Optimize a model with 1866 rows, 3062 columns and 8262 nonzeros Presolve removed 35 rows and 945 columns Presolve time: 0.01s Presolved: 1831 rows, 2117 columns, 7317 nonzeros Variable types: 0 continuous, 2117 integer (2117 binary) Root relaxation: objective 0.000000e+00, 123 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 (123 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 -- 27 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:50 2012 Optimize a model with 956 rows, 1508 columns and 3978 nonzeros Presolve removed 35 rows and 455 columns Presolve time: 0.01s Presolved: 921 rows, 1053 columns, 3523 nonzeros Variable types: 0 continuous, 1053 integer (1053 binary) Root relaxation: objective 0.000000e+00, 127 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 (127 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 -- 13 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:51 2012 Optimize a model with 501 rows, 731 columns and 1836 nonzeros Presolve removed 35 rows and 210 columns Presolve time: 0.00s Presolved: 466 rows, 521 columns, 1626 nonzeros Variable types: 0 continuous, 521 integer (521 binary) Root relaxation: objective 0.000000e+00, 118 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 (118 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 -- 6 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:51 2012 Optimize a model with 306 rows, 398 columns and 918 nonzeros Presolve removed 35 rows and 105 columns Presolve time: 0.00s Presolved: 271 rows, 293 columns, 813 nonzeros Variable types: 0 continuous, 293 integer (293 binary) Root relaxation: objective 0.000000e+00, 110 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 (110 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 -- 3 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:51 2012 Optimize a model with 176 rows, 176 columns and 306 nonzeros Presolve removed 176 rows and 176 columns Presolve time: 0.00s Explored 0 nodes (0 simplex iterations) in 0.00 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: 1 -- 3 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:51 2012 Optimize a model with 241 rows, 287 columns and 612 nonzeros Presolve removed 121 rows and 161 columns Presolve time: 0.00s Presolved: 120 rows, 126 columns, 360 nonzeros Variable types: 0 continuous, 126 integer (126 binary) Root relaxation: objective 0.000000e+00, 54 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 (54 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: 2