current bounds on the number of colors: 0 -- 148 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:45:13 2012 Optimize a model with 44400 rows, 11550 columns and 143708 nonzeros Presolve time: 0.15s Presolved: 44400 rows, 11550 columns, 143708 nonzeros Variable types: 0 continuous, 11550 integer (11550 binary) Root relaxation: objective 0.000000e+00, 552 iterations, 0.04 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 (882 simplex iterations) in 0.26 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 -- 74 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:45:14 2012 Optimize a model with 22274 rows, 6074 columns and 71854 nonzeros Presolve time: 0.11s Presolved: 22274 rows, 6074 columns, 71854 nonzeros Variable types: 0 continuous, 6074 integer (6074 binary) Root relaxation: objective 0.000000e+00, 385 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 (663 simplex iterations) in 0.16 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 -- 37 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:45:15 2012 Optimize a model with 10912 rows, 3262 columns and 34956 nonzeros Presolve time: 0.04s Presolved: 10912 rows, 3262 columns, 34956 nonzeros Variable types: 0 continuous, 3262 integer (3262 binary) Root relaxation: objective 0.000000e+00, 297 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 (654 simplex iterations) in 0.07 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 Fri Dec 14 18:45:15 2012 Optimize a model with 5530 rows, 1930 columns and 17478 nonzeros Presolve time: 0.02s Presolved: 5530 rows, 1930 columns, 17478 nonzeros Variable types: 0 continuous, 1930 integer (1930 binary) Root relaxation: objective 0.000000e+00, 327 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 (774 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 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:45:15 2012 Optimize a model with 2540 rows, 1190 columns and 7768 nonzeros Presolve time: 0.01s Presolved: 2540 rows, 1190 columns, 7768 nonzeros Variable types: 0 continuous, 1190 integer (1190 binary) Root relaxation: objective 0.000000e+00, 317 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 0 258 - 0.00000 - - 0s 0 0 0.00000 0 254 - 0.00000 - - 0s 0 0 0.00000 0 278 - 0.00000 - - 0s 0 0 0.00000 0 272 - 0.00000 - - 0s 0 0 0.00000 0 356 - 0.00000 - - 0s 0 0 0.00000 0 328 - 0.00000 - - 0s 0 0 0.00000 0 314 - 0.00000 - - 1s 0 0 0.00000 0 273 - 0.00000 - - 1s 0 0 0.00000 0 319 - 0.00000 - - 1s 0 0 0.00000 0 315 - 0.00000 - - 2s 0 0 0.00000 0 332 - 0.00000 - - 2s 0 0 0.00000 0 304 - 0.00000 - - 2s 0 2 0.00000 0 304 - 0.00000 - - 2s 705 101 0.00000 25 326 - 0.00000 - 48.0 5s 715 107 0.00000 17 291 - 0.00000 - 47.3 10s * 834 65 27 0.0000000 0.00000 0.0% 92.9 12s Cutting planes: Zero half: 12 Explored 835 nodes (101860 simplex iterations) in 12.42 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 Fri Dec 14 18:45:27 2012 Optimize a model with 1344 rows, 894 columns and 3884 nonzeros Presolve removed 148 rows and 148 columns Presolve time: 0.00s Presolved: 1196 rows, 746 columns, 3588 nonzeros Variable types: 0 continuous, 746 integer (746 binary) Root relaxation: objective 0.000000e+00, 160 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 0 148 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (648 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:45:27 2012 Optimize a model with 1942 rows, 1042 columns and 5826 nonzeros Presolve time: 0.00s Presolved: 1942 rows, 1042 columns, 5826 nonzeros Variable types: 0 continuous, 1042 integer (1042 binary) Root relaxation: objective 0.000000e+00, 343 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 0 294 - 0.00000 - - 0s 0 0 0.00000 0 294 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3291 simplex iterations) in 0.32 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - optimal solution found: number of colors: 4