current bounds on the number of colors: 0 -- 138 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:24 2012 Optimize a model with 8142 rows, 9638 columns and 33534 nonzeros Presolve removed 25 rows and 1725 columns Presolve time: 0.10s Presolved: 8117 rows, 7913 columns, 31809 nonzeros Variable types: 0 continuous, 7913 integer (7913 binary) Root relaxation: objective 0.000000e+00, 198 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 (198 simplex iterations) in 0.11 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 -- 69 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:25 2012 Optimize a model with 4082 rows, 4808 columns and 16524 nonzeros Presolve removed 25 rows and 850 columns Presolve time: 0.03s Presolved: 4057 rows, 3958 columns, 15674 nonzeros Variable types: 0 continuous, 3958 integer (3958 binary) Root relaxation: objective 0.000000e+00, 198 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 (198 simplex iterations) in 0.04 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 16:18:25 2012 Optimize a model with 2110 rows, 2462 columns and 8262 nonzeros Presolve removed 25 rows and 425 columns Presolve time: 0.01s Presolved: 2085 rows, 2037 columns, 7837 nonzeros Variable types: 0 continuous, 2037 integer (2037 binary) Root relaxation: objective 0.000000e+00, 197 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 (197 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 16:18:25 2012 Optimize a model with 1066 rows, 1220 columns and 3888 nonzeros Presolve removed 25 rows and 200 columns Presolve time: 0.00s Presolved: 1041 rows, 1020 columns, 3688 nonzeros Variable types: 0 continuous, 1020 integer (1020 binary) Root relaxation: objective 0.000000e+00, 195 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 (195 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 16:18:25 2012 Optimize a model with 602 rows, 668 columns and 1944 nonzeros Presolve removed 25 rows and 100 columns Presolve time: 0.00s Presolved: 577 rows, 568 columns, 1844 nonzeros Variable types: 0 continuous, 568 integer (568 binary) Root relaxation: objective 0.000000e+00, 177 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 (177 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 16:18:25 2012 Optimize a model with 370 rows, 392 columns and 972 nonzeros Presolve removed 142 rows and 169 columns Presolve time: 0.00s Presolved: 228 rows, 223 columns, 684 nonzeros Variable types: 0 continuous, 223 integer (223 binary) Root relaxation: objective 0.000000e+00, 125 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 Explored 0 nodes (412 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 16:18:25 2012 Optimize a model with 486 rows, 530 columns and 1458 nonzeros Presolve removed 25 rows and 75 columns Presolve time: 0.00s Presolved: 461 rows, 455 columns, 1383 nonzeros Variable types: 0 continuous, 455 integer (455 binary) Root relaxation: objective 0.000000e+00, 182 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 (182 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