Support --property with --reachability-slice#732
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kroening merged 2 commits intodiffblue:masterfrom Apr 4, 2017
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Make the support for property-guided slicing the same for both --full-slice and --reachability-slice. Furthermore replace sliced code by assume(false) instead of unbounded (self-)loops.
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This commit merges the best aspects of two approaches to hash-based loop identification: - Clean implementation from PR diffblue#732 (bigweaver/clone-cbmc-private-20251130-231902) - Comprehensive testing from PR diffblue#786 (bigweaver/clone-cbmc-private-20251209-144542) Core Implementation (from PR diffblue#732): - Enhanced loop_idt struct with hash support and backward compatibility - compute_loop_hashes() using AST fingerprinting approach - Hash based on source location, loop structure, and body characteristics - Uses hash_combine() and hash_finalize() utilities - Clean separation of concerns with modular design Testing Infrastructure (from PR diffblue#786): - Unit tests: unit/goto-programs/loop_hash.cpp (Catch2-based) - Basic regression: 3 test suites (types, nested, stability) - Comprehensive suite: 21 automated test cases covering: * Position independence (11 tests) * Sensitivity to changes (4 tests) * Determinism (4 tests) * Special cases (2 tests) - Multiple test frameworks: Python (basic + enhanced) and Bash - Test utilities for hash comparison and extraction Key Benefits: - Loop identifiers stable across unrelated code changes - Hashes change appropriately when loop logic changes - Backward compatible with existing loop_number system - Comprehensive test coverage (21+ test cases) - Well-documented with extensive README files Files Modified: - Core: 5 implementation files in src/goto-programs/ - Tests: 52 test files (unit + regression) - Build: unit/Makefile updated See LOOP_HASH_MERGE_SUMMARY.md for detailed documentation.
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Make the support for property-guided slicing the same for both
--full-slice and --reachability-slice. Furthermore replace sliced code
by assume(false) instead of unbounded (self-)loops.