current bounds on the number of colors: 0 -- 164 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:52:39 2012 Optimize a model with 55596 rows, 14124 columns and 179744 nonzeros Presolve time: 0.17s Presolved: 55596 rows, 14124 columns, 179744 nonzeros Variable types: 0 continuous, 14124 integer (14124 binary) Root relaxation: objective 0.000000e+00, 557 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 (917 simplex iterations) in 0.29 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 -- 82 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:52:40 2012 Optimize a model with 27880 rows, 7400 columns and 89872 nonzeros Presolve time: 0.14s Presolved: 27880 rows, 7400 columns, 89872 nonzeros Variable types: 0 continuous, 7400 integer (7400 binary) Root relaxation: objective 0.000000e+00, 460 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 (791 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 -- 41 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:52:41 2012 Optimize a model with 13684 rows, 3956 columns and 43840 nonzeros Presolve time: 0.05s Presolved: 13684 rows, 3956 columns, 43840 nonzeros Variable types: 0 continuous, 3956 integer (3956 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 (603 simplex iterations) in 0.08 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 -- 20 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:52:41 2012 Optimize a model with 6924 rows, 2316 columns and 21920 nonzeros Presolve time: 0.02s Presolved: 6924 rows, 2316 columns, 21920 nonzeros Variable types: 0 continuous, 2316 integer (2316 binary) Root relaxation: objective 0.000000e+00, 345 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 (605 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 19:52:41 2012 Optimize a model with 3544 rows, 1496 columns and 10960 nonzeros Presolve time: 0.01s Presolved: 3544 rows, 1496 columns, 10960 nonzeros Variable types: 0 continuous, 1496 integer (1496 binary) Root relaxation: objective 0.000000e+00, 377 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 (1849 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:52:41 2012 Optimize a model with 1516 rows, 1004 columns and 4384 nonzeros Presolve removed 164 rows and 164 columns Presolve time: 0.00s Presolved: 1352 rows, 840 columns, 4056 nonzeros Variable types: 0 continuous, 840 integer (840 binary) Root relaxation: objective 0.000000e+00, 169 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 0 164 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (693 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 19:52:41 2012 Optimize a model with 2192 rows, 1168 columns and 6576 nonzeros Presolve time: 0.01s Presolved: 2192 rows, 1168 columns, 6576 nonzeros Variable types: 0 continuous, 1168 integer (1168 binary) Root relaxation: objective 0.000000e+00, 380 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 0 324 - 0.00000 - - 0s 0 0 0.00000 0 326 - 0.00000 - - 0s 0 0 0.00000 0 447 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 24 Zero half: 383 Explored 0 nodes (6444 simplex iterations) in 0.79 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 19:52:42 2012 Optimize a model with 2868 rows, 1332 columns and 8768 nonzeros Presolve time: 0.01s Presolved: 2868 rows, 1332 columns, 8768 nonzeros Variable types: 0 continuous, 1332 integer (1332 binary) Root relaxation: objective 0.000000e+00, 373 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 0 300 - 0.00000 - - 0s 0 0 0.00000 0 302 - 0.00000 - - 0s 0 0 0.00000 0 375 - 0.00000 - - 0s 0 0 0.00000 0 280 - 0.00000 - - 0s 0 0 0.00000 0 278 - 0.00000 - - 1s 0 0 0.00000 0 272 - 0.00000 - - 1s 0 0 0.00000 0 270 - 0.00000 - - 1s 0 0 0.00000 0 268 - 0.00000 - - 1s 0 0 0.00000 0 258 - 0.00000 - - 1s 0 0 0.00000 0 254 - 0.00000 - - 1s 0 0 0.00000 0 246 - 0.00000 - - 2s 0 0 0.00000 0 234 - 0.00000 - - 2s 0 0 0.00000 0 238 - 0.00000 - - 2s 0 0 0.00000 0 238 - 0.00000 - - 2s 0 0 0.00000 0 364 - 0.00000 - - 3s 0 0 0.00000 0 383 - 0.00000 - - 3s 0 0 0.00000 0 383 - 0.00000 - - 3s 0 2 0.00000 0 383 - 0.00000 - - 3s 293 34 0.00000 17 258 - 0.00000 - 89.8 5s 907 44 0.00000 14 372 - 0.00000 - 70.5 10s 975 69 infeasible 25 - 0.00000 - 102 15s 1529 92 infeasible 32 - 0.00000 - 126 20s 2049 130 infeasible 26 - 0.00000 - 141 25s 2554 133 infeasible 30 - 0.00000 - 150 30s 3098 119 0.00000 29 266 - 0.00000 - 155 35s 3622 135 0.00000 31 273 - 0.00000 - 159 40s 4094 111 infeasible 32 - 0.00000 - 163 45s 4625 126 infeasible 34 - 0.00000 - 165 50s 5150 133 0.00000 21 323 - 0.00000 - 166 55s * 5245 2 30 0.0000000 0.00000 0.0% 166 55s Cutting planes: Clique: 1 Zero half: 25 Explored 5246 nodes (910510 simplex iterations) in 55.81 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