current bounds on the number of colors: 0 -- 168 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:41:35 2012 Optimize a model with 58968 rows, 14812 columns and 190512 nonzeros Presolve time: 0.18s Presolved: 58968 rows, 14812 columns, 190512 nonzeros Variable types: 0 continuous, 14812 integer (14812 binary) Root relaxation: objective 0.000000e+00, 556 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 (916 simplex iterations) in 0.31 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 -- 84 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:41:36 2012 Optimize a model with 29568 rows, 7756 columns and 95256 nonzeros Presolve time: 0.14s Presolved: 29568 rows, 7756 columns, 95256 nonzeros Variable types: 0 continuous, 7756 integer (7756 binary) Root relaxation: objective 0.000000e+00, 476 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 (802 simplex iterations) in 0.21 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 -- 42 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:41:36 2012 Optimize a model with 14868 rows, 4228 columns and 47628 nonzeros Presolve time: 0.06s Presolved: 14868 rows, 4228 columns, 47628 nonzeros Variable types: 0 continuous, 4228 integer (4228 binary) Root relaxation: objective 0.000000e+00, 349 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 (653 simplex iterations) in 0.09 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 -- 21 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:41:36 2012 Optimize a model with 7168 rows, 2380 columns and 22680 nonzeros Presolve time: 0.02s Presolved: 7168 rows, 2380 columns, 22680 nonzeros Variable types: 0 continuous, 2380 integer (2380 binary) Root relaxation: objective 0.000000e+00, 347 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 (682 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 -- 10 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:41:37 2012 Optimize a model with 3668 rows, 1540 columns and 11340 nonzeros Presolve time: 0.01s Presolved: 3668 rows, 1540 columns, 11340 nonzeros Variable types: 0 continuous, 1540 integer (1540 binary) Root relaxation: objective 0.000000e+00, 374 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 57 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (3382 simplex iterations) in 0.20 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 Fri Dec 14 20:41:37 2012 Optimize a model with 1568 rows, 1036 columns and 4536 nonzeros Presolve removed 168 rows and 168 columns Presolve time: 0.00s Presolved: 1400 rows, 868 columns, 4200 nonzeros Variable types: 0 continuous, 868 integer (868 binary) Root relaxation: objective 0.000000e+00, 174 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 0 168 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (724 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 Fri Dec 14 20:41:37 2012 Optimize a model with 2268 rows, 1204 columns and 6804 nonzeros Presolve time: 0.01s Presolved: 2268 rows, 1204 columns, 6804 nonzeros Variable types: 0 continuous, 1204 integer (1204 binary) Root relaxation: objective 0.000000e+00, 377 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 0 318 - 0.00000 - - 0s 0 0 0.00000 0 332 - 0.00000 - - 0s 0 0 0.00000 0 425 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 7 Zero half: 707 Explored 0 nodes (7564 simplex iterations) in 0.74 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 Fri Dec 14 20:41:38 2012 Optimize a model with 2968 rows, 1372 columns and 9072 nonzeros Presolve time: 0.01s Presolved: 2968 rows, 1372 columns, 9072 nonzeros Variable types: 0 continuous, 1372 integer (1372 binary) Root relaxation: objective 0.000000e+00, 416 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 0 302 - 0.00000 - - 0s 0 0 0.00000 0 310 - 0.00000 - - 0s 0 0 0.00000 0 322 - 0.00000 - - 0s 0 0 0.00000 0 338 - 0.00000 - - 0s 0 0 0.00000 0 304 - 0.00000 - - 0s 0 0 0.00000 0 304 - 0.00000 - - 0s 0 0 0.00000 0 292 - 0.00000 - - 1s 0 0 0.00000 0 278 - 0.00000 - - 1s 0 0 0.00000 0 272 - 0.00000 - - 1s 0 0 0.00000 0 276 - 0.00000 - - 1s 0 0 0.00000 0 268 - 0.00000 - - 1s 0 0 0.00000 0 270 - 0.00000 - - 2s 0 0 0.00000 0 270 - 0.00000 - - 2s 0 2 0.00000 0 270 - 0.00000 - - 2s 604 95 0.00000 29 451 - 0.00000 - 81.5 5s 610 99 0.00000 27 379 - 0.00000 - 80.7 10s 615 102 0.00000 29 354 - 0.00000 - 80.0 15s 994 80 infeasible 37 - 0.00000 - 142 20s 1705 127 infeasible 32 - 0.00000 - 140 25s 2333 139 0.00000 35 278 - 0.00000 - 144 30s * 2778 2 33 0.0000000 0.00000 0.0% 144 33s Cutting planes: Gomory: 1 Zero half: 4 Explored 2779 nodes (428636 simplex iterations) in 33.28 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% optimal solution found: number of colors: 4