current bounds on the number of colors: 0 -- 152 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:49:42 2012 Optimize a model with 46816 rows, 12166 columns and 151544 nonzeros Presolve time: 0.16s Presolved: 46816 rows, 12166 columns, 151544 nonzeros Variable types: 0 continuous, 12166 integer (12166 binary) Root relaxation: objective 0.000000e+00, 589 iterations, 0.05 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 (925 simplex iterations) in 0.28 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 -- 76 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:49:43 2012 Optimize a model with 23484 rows, 6390 columns and 75772 nonzeros Presolve time: 0.12s Presolved: 23484 rows, 6390 columns, 75772 nonzeros Variable types: 0 continuous, 6390 integer (6390 binary) Root relaxation: objective 0.000000e+00, 424 iterations, 0.02 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 (884 simplex iterations) in 0.19 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 -- 38 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:49:43 2012 Optimize a model with 11818 rows, 3502 columns and 37886 nonzeros Presolve time: 0.04s Presolved: 11818 rows, 3502 columns, 37886 nonzeros Variable types: 0 continuous, 3502 integer (3502 binary) Root relaxation: objective 0.000000e+00, 332 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 (610 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 -- 19 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:49:43 2012 Optimize a model with 5678 rows, 1982 columns and 17946 nonzeros Presolve time: 0.02s Presolved: 5678 rows, 1982 columns, 17946 nonzeros Variable types: 0 continuous, 1982 integer (1982 binary) Root relaxation: objective 0.000000e+00, 315 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 (594 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 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:49:43 2012 Optimize a model with 2608 rows, 1222 columns and 7976 nonzeros Presolve time: 0.01s Presolved: 2608 rows, 1222 columns, 7976 nonzeros Variable types: 0 continuous, 1222 integer (1222 binary) Root relaxation: objective 0.000000e+00, 357 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 0 282 - 0.00000 - - 0s 0 0 0.00000 0 278 - 0.00000 - - 0s 0 0 0.00000 0 282 - 0.00000 - - 0s 0 0 0.00000 0 280 - 0.00000 - - 0s 0 0 0.00000 0 394 - 0.00000 - - 0s 0 0 0.00000 0 355 - 0.00000 - - 0s 0 0 0.00000 0 291 - 0.00000 - - 1s 0 0 0.00000 0 146 - 0.00000 - - 1s 0 0 0.00000 0 365 - 0.00000 - - 1s 0 0 0.00000 0 304 - 0.00000 - - 2s 0 0 0.00000 0 344 - 0.00000 - - 2s 0 0 0.00000 0 346 - 0.00000 - - 2s 0 0 0.00000 0 346 - 0.00000 - - 2s 0 2 0.00000 0 346 - 0.00000 - - 3s 606 57 0.00000 17 180 - 0.00000 - 67.1 5s 1217 52 0.00000 8 324 - 0.00000 - 62.9 10s * 1354 10 26 0.0000000 0.00000 0.0% 83.5 14s Cutting planes: Gomory: 1 Clique: 1 Zero half: 12 Explored 1355 nodes (141765 simplex iterations) in 14.41 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 18:49:58 2012 Optimize a model with 1380 rows, 918 columns and 3988 nonzeros Presolve removed 152 rows and 152 columns Presolve time: 0.00s Presolved: 1228 rows, 766 columns, 3684 nonzeros Variable types: 0 continuous, 766 integer (766 binary) Root relaxation: objective 0.000000e+00, 159 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 0 152 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (630 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 18:49:58 2012 Optimize a model with 1994 rows, 1070 columns and 5982 nonzeros Presolve time: 0.00s Presolved: 1994 rows, 1070 columns, 5982 nonzeros Variable types: 0 continuous, 1070 integer (1070 binary) Root relaxation: objective 0.000000e+00, 352 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 0 302 - 0.00000 - - 0s 0 0 0.00000 0 300 - 0.00000 - - 0s 0 0 0.00000 0 424 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 40 Clique: 1 Zero half: 307 Explored 0 nodes (5314 simplex iterations) in 0.63 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