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"instance_id": "assignment_medium_s42",
"problem_type": "assignment",
"size": "medium",
"seed": 42,
"label": "Assignment (medium)",
"features": {
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"n_constraints": 20,
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"sparsity": 0.1,
"coefficient_range": 100.0,
"constraint_tightness": 0.5
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"avg_degree": 10,
"connected_components": 1,
"treewidth_approx": 10
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"problem": {
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"n_jobs": 10,
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"customer_clustering": 0.0,
"demand_variance": 0.0,
"time_window_tightness": 0.0
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"prediction": {
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"confidence": 0.684,
"predicted_runtime_sec": 0.42,
"predicted_gap_pct": 3.125,
"feasible_probability": 0.92,
"rationale": "Assignment (medium): 100 variables, 20 constraints | Structure: binary=100%, integer=100%, tightness=0.50 | Top pick: OR-Tools CP-SAT (score=1.361, pred gap=3.1%, feasible=92%) | Runner-up: MiniZinc (\u0394=0.074)",
"rankings": [
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"feasible_probability": 0.92,
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"config": {
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"solver": "chuffed",
"neighborhood_size": 12
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{
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"feasible_probability": 0.89,
"config": {
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"neighborhood_size": 24,
"destroy_pct": 0.3,
"initial_solution": "greedy"
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{
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"score": 1.0182,
"predicted_runtime_sec": 0.36,
"predicted_gap_pct": 1.5,
"feasible_probability": 0.94,
"config": {
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"MIPFocus": 1,
"Heuristics": 0.25,
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{
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"config": {
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{
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"feasible_probability": 0.9,
"config": {
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"presolve": "on",
"threads": 4,
"mip_rel_gap": 0.01,
"cut_strategy": "aggressive"
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{
"solver_id": "cbc",
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"config": {
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"cuts": "on",
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{
"solver_id": "glpk",
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]
}
} |