current bounds on the number of colors: 0 -- 137 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:12 2012 Optimize a model with 7005 rows, 9417 columns and 29920 nonzeros Presolve removed 29 rows and 1972 columns Presolve time: 0.09s Presolved: 6976 rows, 7445 columns, 27948 nonzeros Variable types: 0 continuous, 7445 integer (7445 binary) Root relaxation: objective 0.000000e+00, 179 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 (179 simplex iterations) in 0.10 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 -- 68 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:12 2012 Optimize a model with 3571 rows, 4759 columns and 14960 nonzeros Presolve removed 29 rows and 986 columns Presolve time: 0.03s Presolved: 3542 rows, 3773 columns, 13974 nonzeros Variable types: 0 continuous, 3773 integer (3773 binary) Root relaxation: objective 0.000000e+00, 180 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 (180 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 -- 34 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:12 2012 Optimize a model with 1854 rows, 2430 columns and 7480 nonzeros Presolve removed 29 rows and 493 columns Presolve time: 0.01s Presolved: 1825 rows, 1937 columns, 6987 nonzeros Variable types: 0 continuous, 1937 integer (1937 binary) Root relaxation: objective 0.000000e+00, 179 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 (179 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 -- 17 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:12 2012 Optimize a model with 945 rows, 1197 columns and 3520 nonzeros Presolve removed 29 rows and 232 columns Presolve time: 0.00s Presolved: 916 rows, 965 columns, 3288 nonzeros Variable types: 0 continuous, 965 integer (965 binary) Root relaxation: objective 0.000000e+00, 184 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 (184 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 16:18:12 2012 Optimize a model with 541 rows, 649 columns and 1760 nonzeros Presolve removed 29 rows and 116 columns Presolve time: 0.00s Presolved: 512 rows, 533 columns, 1644 nonzeros Variable types: 0 continuous, 533 integer (533 binary) Root relaxation: objective 0.000000e+00, 156 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 (156 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 16:18:12 2012 Optimize a model with 339 rows, 375 columns and 880 nonzeros Presolve removed 145 rows and 178 columns Presolve time: 0.00s Presolved: 194 rows, 197 columns, 582 nonzeros Variable types: 0 continuous, 197 integer (197 binary) Root relaxation: objective 0.000000e+00, 102 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 72 - 0.00000 - - 0s Explored 0 nodes (293 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 16:18:12 2012 Optimize a model with 440 rows, 512 columns and 1320 nonzeros Presolve removed 29 rows and 87 columns Presolve time: 0.00s Presolved: 411 rows, 425 columns, 1233 nonzeros Variable types: 0 continuous, 425 integer (425 binary) Root relaxation: objective 0.000000e+00, 168 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 (168 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