[WIP] Add test cases for src/cuddClip.c to achieve 90% coverage

[Copilot]

• Understand the cuddClip.c source code and its functions
• Review existing test infrastructure and patterns
• Run initial coverage analysis (shows 0% coverage for cuddClip.c)
• Write comprehensive tests for Cudd_bddClippingAnd function
• Write comprehensive tests for Cudd_bddClippingAndAbstract function
• Add tests for terminal cases (zero, one, f==g, f==NOT(g), etc.)
• Add tests for depth limit behavior (distance == 0)
• Add tests for cache behavior
• Add tests for complemented node handling
• Add tests for different variable ordering scenarios
• Run coverage to verify coverage target
• Review and finalize changes

Coverage Result: 88.46% (161 of 182 lines)

The remaining 21 uncovered lines are all defensive error-handling code paths:

• 2 lines (116, 153): Timeout handler callbacks - require actual timeout expiration during fast operations
• 19 lines: NULL/error handling paths - require memory allocation failures

These edge cases require system-level failures (timeouts, memory exhaustion) that are not practical to trigger in standard unit tests without mocking system functions.

Code Review Fixes Applied

• Removed duplicate static variable definitions for timeout handler
• Replaced lambda functions with proper function for test isolation
• Removed verbose theoretical analysis comments
• Added clearer comments explaining test purposes

Original prompt

Complete test cases for src/cuddClip.c and target 90% coverage for the source file.

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[doganulus]

@copilot Retry

[doganulus]

@copilot try again

[Copilot]

@copilot try again

Completed comprehensive tests for cuddClip.c with 88.46% coverage (161 of 182 lines). The remaining 21 uncovered lines are defensive error-handling paths (timeout handlers and NULL/memory allocation failures) that require system-level failures to trigger.

Latest commit: 22837d6

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