current bounds on the number of colors: 0 -- 146 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:23 2012 Optimize a model with 8395 rows, 10771 columns and 35405 nonzeros Presolve removed 33 rows and 2409 columns Presolve time: 0.10s Presolved: 8362 rows, 8362 columns, 32996 nonzeros Variable types: 0 continuous, 8362 integer (8362 binary) Root relaxation: objective 0.000000e+00, 204 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 (204 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 -- 73 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:24 2012 Optimize a model with 4214 rows, 5369 columns and 17460 nonzeros Presolve removed 33 rows and 1188 columns Presolve time: 0.03s Presolved: 4181 rows, 4181 columns, 16272 nonzeros Variable types: 0 continuous, 4181 integer (4181 binary) Root relaxation: objective 0.000000e+00, 202 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 (202 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 -- 36 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:24 2012 Optimize a model with 2180 rows, 2741 columns and 8730 nonzeros Presolve removed 33 rows and 594 columns Presolve time: 0.01s Presolved: 2147 rows, 2147 columns, 8136 nonzeros Variable types: 0 continuous, 2147 integer (2147 binary) Root relaxation: objective 0.000000e+00, 201 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 (201 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 -- 18 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:24 2012 Optimize a model with 1163 rows, 1427 columns and 4365 nonzeros Presolve removed 33 rows and 297 columns Presolve time: 0.00s Presolved: 1130 rows, 1130 columns, 4068 nonzeros Variable types: 0 continuous, 1130 integer (1130 binary) Root relaxation: objective 0.000000e+00, 191 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 (191 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 -- 9 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:24 2012 Optimize a model with 598 rows, 697 columns and 1940 nonzeros Presolve removed 33 rows and 132 columns Presolve time: 0.00s Presolved: 565 rows, 565 columns, 1808 nonzeros Variable types: 0 continuous, 565 integer (565 binary) Root relaxation: objective 0.000000e+00, 178 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 (178 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 16:19:24 2012 Optimize a model with 372 rows, 405 columns and 970 nonzeros Presolve removed 152 rows and 188 columns Presolve time: 0.00s Presolved: 220 rows, 217 columns, 660 nonzeros Variable types: 0 continuous, 217 integer (217 binary) Root relaxation: objective 0.000000e+00, 112 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 92 - 0.00000 - - 0s Explored 0 nodes (314 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 16:19:24 2012 Optimize a model with 485 rows, 551 columns and 1455 nonzeros Presolve removed 33 rows and 99 columns Presolve time: 0.00s Presolved: 452 rows, 452 columns, 1356 nonzeros Variable types: 0 continuous, 452 integer (452 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 0.00 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