current bounds on the number of colors: 0 -- 190 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 05:06:06 2012 Optimize a model with 87875 rows, 18973 columns and 281105 nonzeros Presolve time: 0.28s Presolved: 87875 rows, 18973 columns, 281105 nonzeros Variable types: 0 continuous, 18973 integer (18973 binary) Root relaxation: objective 0.000000e+00, 657 iterations, 0.06 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 (1036 simplex iterations) in 0.46 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 -- 95 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 05:06:08 2012 Optimize a model with 43571 rows, 9853 columns and 139073 nonzeros Presolve time: 0.15s Presolved: 43571 rows, 9853 columns, 139073 nonzeros Variable types: 0 continuous, 9853 integer (9853 binary) Root relaxation: objective 0.000000e+00, 533 iterations, 0.03 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 (926 simplex iterations) in 0.24 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 -- 47 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 05:06:08 2012 Optimize a model with 21419 rows, 5293 columns and 68057 nonzeros Presolve time: 0.09s Presolved: 21419 rows, 5293 columns, 68057 nonzeros Variable types: 0 continuous, 5293 integer (5293 binary) Root relaxation: objective 0.000000e+00, 400 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 (765 simplex iterations) in 0.13 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 -- 23 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 05:06:09 2012 Optimize a model with 10343 rows, 3013 columns and 32549 nonzeros Presolve time: 0.03s Presolved: 10343 rows, 3013 columns, 32549 nonzeros Variable types: 0 continuous, 3013 integer (3013 binary) Root relaxation: objective 0.000000e+00, 393 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 (721 simplex iterations) in 0.06 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 05:06:09 2012 Optimize a model with 4805 rows, 1873 columns and 14795 nonzeros Presolve time: 0.01s Presolved: 4805 rows, 1873 columns, 14795 nonzeros Variable types: 0 continuous, 1873 integer (1873 binary) Root relaxation: objective 0.000000e+00, 419 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 (2256 simplex iterations) in 0.12 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 05:06:09 2012 Optimize a model with 2036 rows, 1303 columns and 5918 nonzeros Presolve removed 190 rows and 190 columns Presolve time: 0.01s Presolved: 1846 rows, 1113 columns, 5538 nonzeros Variable types: 0 continuous, 1113 integer (1113 binary) Root relaxation: objective 0.000000e+00, 199 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 0 190 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (843 simplex iterations) in 0.02 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 05:06:09 2012 Optimize a model with 2959 rows, 1493 columns and 8877 nonzeros Presolve time: 0.01s Presolved: 2959 rows, 1493 columns, 8877 nonzeros Variable types: 0 continuous, 1493 integer (1493 binary) Root relaxation: objective 0.000000e+00, 483 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 366 - 0.00000 - - 0s 0 0 0.00000 0 372 - 0.00000 - - 0s 0 0 0.00000 0 515 - 0.00000 - - 1s 0 0 0.00000 0 541 - 0.00000 - - 1s 0 0 infeasible 0 - 0.10000 - - 1s Cutting planes: Gomory: 1 Zero half: 908 Explored 0 nodes (9695 simplex iterations) in 1.57 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: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 05:06:11 2012 Optimize a model with 3882 rows, 1683 columns and 11836 nonzeros Presolve time: 0.01s Presolved: 3882 rows, 1683 columns, 11836 nonzeros Variable types: 0 continuous, 1683 integer (1683 binary) Root relaxation: objective 0.000000e+00, 430 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 370 - 0.00000 - - 0s 0 0 0.00000 0 362 - 0.00000 - - 0s 0 0 0.00000 0 360 - 0.00000 - - 0s 0 0 0.00000 0 401 - 0.00000 - - 0s 0 0 0.00000 0 352 - 0.00000 - - 1s 0 0 0.00000 0 344 - 0.00000 - - 2s 0 0 0.00000 0 342 - 0.00000 - - 2s 0 0 0.00000 0 342 - 0.00000 - - 2s 0 0 0.00000 0 342 - 0.00000 - - 3s 0 0 0.00000 0 336 - 0.00000 - - 3s 0 0 0.00000 0 340 - 0.00000 - - 4s 0 0 0.00000 0 338 - 0.00000 - - 4s 0 2 0.00000 0 338 - 0.00000 - - 5s 613 63 0.00000 9 360 - 0.00000 - 119 10s 617 66 0.00000 20 334 - 0.00000 - 118 15s 621 69 0.00000 7 322 - 0.00000 - 117 21s 624 71 0.00000 9 321 - 0.00000 - 117 25s 867 27 0.00000 28 354 - 0.00000 - 207 30s 1219 9 0.00000 17 354 - 0.00000 - 206 35s 1524 16 0.00000 19 445 - 0.00000 - 208 40s 1802 32 0.00000 26 336 - 0.00000 - 215 45s 2030 14 infeasible 23 - 0.00000 - 222 50s 2296 10 infeasible 26 - 0.00000 - 226 55s 2573 7 infeasible 24 - 0.00000 - 229 60s Cutting planes: Gomory: 1 Zero half: 11 Explored 2629 nodes (642430 simplex iterations) in 61.06 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 5