current bounds on the number of colors: 0 -- 181 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:25:21 2012 Optimize a model with 16561 rows, 16472 columns and 65430 nonzeros Presolve removed 22 rows and 1980 columns Presolve time: 0.12s Presolved: 16539 rows, 14492 columns, 63450 nonzeros Variable types: 0 continuous, 14492 integer (14492 binary) Root relaxation: objective 0.000000e+00, 293 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 (293 simplex iterations) in 0.14 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 -- 90 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:25:22 2012 Optimize a model with 8371 rows, 8327 columns and 32715 nonzeros Presolve removed 22 rows and 990 columns Presolve time: 0.07s Presolved: 8349 rows, 7337 columns, 31725 nonzeros Variable types: 0 continuous, 7337 integer (7337 binary) Root relaxation: objective 0.000000e+00, 294 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 (294 simplex iterations) in 0.08 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 -- 45 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:25:22 2012 Optimize a model with 4185 rows, 4164 columns and 15994 nonzeros Presolve removed 22 rows and 484 columns Presolve time: 0.02s Presolved: 4163 rows, 3680 columns, 15510 nonzeros Variable types: 0 continuous, 3680 integer (3680 binary) Root relaxation: objective 0.000000e+00, 299 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 (299 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 -- 22 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:25:22 2012 Optimize a model with 2183 rows, 2173 columns and 7997 nonzeros Presolve removed 22 rows and 242 columns Presolve time: 0.01s Presolved: 2161 rows, 1931 columns, 7755 nonzeros Variable types: 0 continuous, 1931 integer (1931 binary) Root relaxation: objective 0.000000e+00, 300 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 (519 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 -- 11 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:25:22 2012 Optimize a model with 1091 rows, 1087 columns and 3635 nonzeros Presolve removed 22 rows and 110 columns Presolve time: 0.00s Presolved: 1069 rows, 977 columns, 3525 nonzeros Variable types: 0 continuous, 977 integer (977 binary) Root relaxation: objective 0.000000e+00, 263 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 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:25:22 2012 Optimize a model with 545 rows, 544 columns and 1454 nonzeros Presolve removed 189 rows and 215 columns Presolve time: 0.00s Presolved: 356 rows, 329 columns, 1068 nonzeros Variable types: 0 continuous, 329 integer (329 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 0.00000 0 134 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (531 simplex iterations) in 0.01 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 16:25:22 2012 Optimize a model with 727 rows, 725 columns and 2181 nonzeros Presolve removed 22 rows and 66 columns Presolve time: 0.00s Presolved: 705 rows, 659 columns, 2115 nonzeros Variable types: 0 continuous, 659 integer (659 binary) Root relaxation: objective 0.000000e+00, 283 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 (393 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% optimal solution found: number of colors: 3