current bounds on the number of colors: 0 -- 171 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:24:16 2012 Optimize a model with 61286 rows, 15254 columns and 197880 nonzeros Presolve time: 0.19s Presolved: 61286 rows, 15254 columns, 197880 nonzeros Variable types: 0 continuous, 15254 integer (15254 binary) Root relaxation: objective 0.000000e+00, 581 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 (934 simplex iterations) in 0.32 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 -- 85 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:24:17 2012 Optimize a model with 30369 rows, 7901 columns and 97776 nonzeros Presolve time: 0.14s Presolved: 30369 rows, 7901 columns, 97776 nonzeros Variable types: 0 continuous, 7901 integer (7901 binary) Root relaxation: objective 0.000000e+00, 452 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 (780 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 -- 42 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:24:17 2012 Optimize a model with 15270 rows, 4310 columns and 48888 nonzeros Presolve time: 0.06s Presolved: 15270 rows, 4310 columns, 48888 nonzeros Variable types: 0 continuous, 4310 integer (4310 binary) Root relaxation: objective 0.000000e+00, 387 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 (701 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 21:24:18 2012 Optimize a model with 7361 rows, 2429 columns and 23280 nonzeros Presolve time: 0.02s Presolved: 7361 rows, 2429 columns, 23280 nonzeros Variable types: 0 continuous, 2429 integer (2429 binary) Root relaxation: objective 0.000000e+00, 361 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 (636 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 21:24:18 2012 Optimize a model with 3766 rows, 1574 columns and 11640 nonzeros Presolve time: 0.01s Presolved: 3766 rows, 1574 columns, 11640 nonzeros Variable types: 0 continuous, 1574 integer (1574 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1289 simplex iterations) in 0.05 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 21:24:18 2012 Optimize a model with 1609 rows, 1061 columns and 4656 nonzeros Presolve removed 171 rows and 171 columns Presolve time: 0.00s Presolved: 1438 rows, 890 columns, 4314 nonzeros Variable types: 0 continuous, 890 integer (890 binary) Root relaxation: objective 0.000000e+00, 183 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 0 171 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (707 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 21:24:18 2012 Optimize a model with 2328 rows, 1232 columns and 6984 nonzeros Presolve time: 0.01s Presolved: 2328 rows, 1232 columns, 6984 nonzeros Variable types: 0 continuous, 1232 integer (1232 binary) Root relaxation: objective 0.000000e+00, 387 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 0 328 - 0.00000 - - 0s 0 0 0.00000 0 336 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3905 simplex iterations) in 0.33 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 21:24:18 2012 Optimize a model with 3047 rows, 1403 columns and 9312 nonzeros Presolve time: 0.01s Presolved: 3047 rows, 1403 columns, 9312 nonzeros Variable types: 0 continuous, 1403 integer (1403 binary) Root relaxation: objective 0.000000e+00, 403 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 0 314 - 0.00000 - - 0s 0 0 0.00000 0 294 - 0.00000 - - 0s 0 0 0.00000 0 322 - 0.00000 - - 0s 0 0 0.00000 0 430 - 0.00000 - - 0s 0 0 0.00000 0 383 - 0.00000 - - 1s 0 0 0.00000 0 403 - 0.00000 - - 1s 0 0 0.00000 0 396 - 0.00000 - - 1s 0 0 0.00000 0 405 - 0.00000 - - 2s 0 0 0.00000 0 405 - 0.00000 - - 2s 0 2 0.00000 0 405 - 0.00000 - - 3s 390 26 infeasible 18 - 0.00000 - 97.8 5s 609 44 0.00000 2 270 - 0.00000 - 95.5 10s 616 49 0.00000 8 214 - 0.00000 - 94.5 15s 916 93 0.00000 25 240 - 0.00000 - 174 20s * 930 2 28 0.0000000 0.00000 0.0% 174 20s Cutting planes: Gomory: 2 Zero half: 9 Explored 931 nodes (182718 simplex iterations) in 20.15 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