def_module_params(class_name='pattern_inference_params_helper',
module_name='pi',
description='pattern inference (heuristics) for universal formulas (without annotation)',
export=True,
params=(('max_multi_patterns', UINT, 0, 'when patterns are not provided, the prover uses a heuristic to infer them, this option sets the threshold on the number of extra multi-patterns that can be created; by default, the prover creates at most one multi-pattern when there is no unary pattern'),
('block_loop_patterns', BOOL, True, 'block looping patterns during pattern inference'),
('decompose_patterns', BOOL, True, 'allow decomposition of patterns into multipatterns'),
('arith', UINT, 1, '0 - do not infer patterns with arithmetic terms, 1 - use patterns with arithmetic terms if there is no other pattern, 2 - always use patterns with arithmetic terms'),
('use_database', BOOL, False, 'use pattern database'),
('enabled', BOOL, True, 'enable a heuristic to infer patterns, when they are not provided'),
('arith_weight', UINT, 5, 'default weight for quantifiers where the only available pattern has nested arithmetic terms'),
('non_nested_arith_weight', UINT, 10, 'default weight for quantifiers where the only available pattern has non nested arithmetic terms'),
('pull_quantifiers', BOOL, True, 'pull nested quantifiers, if no pattern was found'),
('avoid_skolems', BOOL, True, 'avoid skolem functions when computing patterns'),
('warnings', BOOL, False, 'enable/disable warning messages in the pattern inference module')))