current bounds on the number of colors: 0 -- 172 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:43:54 2012 Optimize a model with 63554 rows, 15529 columns and 204938 nonzeros Presolve time: 0.20s Presolved: 63554 rows, 15529 columns, 204938 nonzeros Variable types: 0 continuous, 15529 integer (15529 binary) Root relaxation: objective 0.000000e+00, 550 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 (875 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 -- 86 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:43:55 2012 Optimize a model with 31863 rows, 8133 columns and 102469 nonzeros Presolve time: 0.15s Presolved: 31863 rows, 8133 columns, 102469 nonzeros Variable types: 0 continuous, 8133 integer (8133 binary) Root relaxation: objective 0.000000e+00, 439 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 (782 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 -- 43 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:43:55 2012 Optimize a model with 15649 rows, 4349 columns and 50043 nonzeros Presolve time: 0.06s Presolved: 15649 rows, 4349 columns, 50043 nonzeros Variable types: 0 continuous, 4349 integer (4349 binary) Root relaxation: objective 0.000000e+00, 350 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 (678 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 21:43:55 2012 Optimize a model with 7542 rows, 2457 columns and 23830 nonzeros Presolve time: 0.02s Presolved: 7542 rows, 2457 columns, 23830 nonzeros Variable types: 0 continuous, 2457 integer (2457 binary) Root relaxation: objective 0.000000e+00, 368 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 (692 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 21:43:56 2012 Optimize a model with 3857 rows, 1597 columns and 11915 nonzeros Presolve time: 0.01s Presolved: 3857 rows, 1597 columns, 11915 nonzeros Variable types: 0 continuous, 1597 integer (1597 binary) Root relaxation: objective 0.000000e+00, 370 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 17 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (2404 simplex iterations) in 0.10 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 21:43:56 2012 Optimize a model with 1646 rows, 1081 columns and 4766 nonzeros Presolve removed 172 rows and 172 columns Presolve time: 0.00s Presolved: 1474 rows, 909 columns, 4422 nonzeros Variable types: 0 continuous, 909 integer (909 binary) Root relaxation: objective 0.000000e+00, 182 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 0 172 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (718 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 21:43:56 2012 Optimize a model with 2383 rows, 1253 columns and 7149 nonzeros Presolve time: 0.01s Presolved: 2383 rows, 1253 columns, 7149 nonzeros Variable types: 0 continuous, 1253 integer (1253 binary) Root relaxation: objective 0.000000e+00, 384 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 0 272 - 0.00000 - - 0s 0 0 0.00000 0 340 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (5161 simplex iterations) in 0.44 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 21:43:56 2012 Optimize a model with 3120 rows, 1425 columns and 9532 nonzeros Presolve time: 0.01s Presolved: 3120 rows, 1425 columns, 9532 nonzeros Variable types: 0 continuous, 1425 integer (1425 binary) Root relaxation: objective 0.000000e+00, 389 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 0 336 - 0.00000 - - 0s 0 0 0.00000 0 330 - 0.00000 - - 0s 0 0 0.00000 0 304 - 0.00000 - - 0s 0 0 0.00000 0 366 - 0.00000 - - 0s 0 0 0.00000 0 280 - 0.00000 - - 1s 0 0 0.00000 0 286 - 0.00000 - - 1s 0 0 0.00000 0 272 - 0.00000 - - 1s 0 0 0.00000 0 262 - 0.00000 - - 1s 0 0 0.00000 0 260 - 0.00000 - - 2s 0 0 0.00000 0 244 - 0.00000 - - 2s 0 0 0.00000 0 224 - 0.00000 - - 2s 0 0 0.00000 0 220 - 0.00000 - - 3s 0 0 0.00000 0 226 - 0.00000 - - 3s 0 0 0.00000 0 218 - 0.00000 - - 3s 0 0 0.00000 0 210 - 0.00000 - - 4s 0 0 0.00000 0 208 - 0.00000 - - 4s 0 0 0.00000 0 310 - 0.00000 - - 4s 0 0 0.00000 0 310 - 0.00000 - - 5s 0 2 0.00000 0 310 - 0.00000 - - 5s 603 89 0.00000 15 304 - 0.00000 - 114 10s 610 94 0.00000 18 248 - 0.00000 - 113 15s 617 99 0.00000 15 326 - 0.00000 - 112 20s 1045 31 0.00000 22 308 - 0.00000 - 181 25s 1515 25 infeasible 26 - 0.00000 - 179 30s 1940 36 0.00000 24 342 - 0.00000 - 183 35s 2414 35 infeasible 26 - 0.00000 - 183 40s 2864 41 0.00000 24 348 - 0.00000 - 183 45s 3315 26 infeasible 26 - 0.00000 - 183 50s 3745 8 infeasible 26 - 0.00000 - 184 55s Cutting planes: Clique: 1 Zero half: 13 Explored 4068 nodes (802248 simplex iterations) in 58.68 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