esbmc/esbmc
Mar 2026 – Jul 2026
5 Months active
Languages Used
CC++
Technical Skills
C programmingC++ developmentC++ programmingalgorithm designcommand line interface designfloating-point arithmetic
ShemaAlosaimi
PROFILE
Shemaalosaimi
Worked on the esbmc/esbmc repository to advance floating-point and real-number reasoning in SMT-based software verification. Over five months, developed theorem-driven interval lifting and rounding-mode support for IEEE-754 arithmetic, improving the accuracy and reliability of floating-point analysis. Enhanced the IR-IEEE encoding path by implementing precise handling for infinity, NaN, and integer-to-floating-point casts, while expanding regression test coverage to guard against edge cases and regressions. Applied C and C++ for backend development, code refactoring, and SMT solver integration, focusing on maintainability and correctness. The work addressed verification fragilities, reduced false positives, and strengthened the foundation for formal verification workflows.
Overall Statistics
Feature vs Bugs
86%Features
Repository Contributions
43Total
Bugs
4
Commits
43
Features
24
Lines of code
13,694
Activity Months5
Your Network
32 peopleSame Organization
@postgrad.manchester.ac.uk1
Work History
July 2026
1 Commits
Jul 1, 2026July 2026 monthly summary for esbmc/esbmc focusing on NaN handling under --ir-ieee encoding. The work delivered fixes a verification fragility caused by misclassification of NaN as a normal value in isnormal, aligning behavior with the NaN predicate infrastructure and ensuring correct handling under IEEE encoding.
1 Commits
Jul 1, 2026July 2026 monthly summary for esbmc/esbmc focusing on NaN handling under --ir-ieee encoding. The work delivered fixes a verification fragility caused by misclassification of NaN as a normal value in isnormal, aligning behavior with the NaN predicate infrastructure and ensuring correct handling under IEEE encoding.
July 2026
June 2026
8 Commits • 4 Features
Jun 1, 2026June 2026 monthly summary for esbmc/esbmc focused on strengthening the IR-IEEE encoding path to improve verification accuracy, reduce false positives, and raise maintainability. Delivered targeted features and fixes in the integer/real SMT encoding, expanded interval propagation, and enhanced NaN semantics support. The work supports more reliable SV-COMP performance and long-term maintainability of the verification engine. Key outcomes: - IR-IEEE encoding improvements across multiple arithmetic operations, enabling more precise modeling and fewer spurious counterexamples. - Expanded regression test coverage to validate changes and guard against regressions in floating-point and NaN-related semantics. - Improved maintainability through modular refactoring and clearer separation of concerns in the IR-IEEE path. Technologies and practices demonstrated include SMT/Z3 encoding, IEEE-754 rounding-mode handling, interval arithmetic, automated regression testing, and C++ refactor patterns.
June 2026
8 Commits • 4 Features
Jun 1, 2026June 2026 monthly summary for esbmc/esbmc focused on strengthening the IR-IEEE encoding path to improve verification accuracy, reduce false positives, and raise maintainability. Delivered targeted features and fixes in the integer/real SMT encoding, expanded interval propagation, and enhanced NaN semantics support. The work supports more reliable SV-COMP performance and long-term maintainability of the verification engine. Key outcomes: - IR-IEEE encoding improvements across multiple arithmetic operations, enabling more precise modeling and fewer spurious counterexamples. - Expanded regression test coverage to validate changes and guard against regressions in floating-point and NaN-related semantics. - Improved maintainability through modular refactoring and clearer separation of concerns in the IR-IEEE path. Technologies and practices demonstrated include SMT/Z3 encoding, IEEE-754 rounding-mode handling, interval arithmetic, automated regression testing, and C++ refactor patterns.
May 2026
3 Commits • 1 Features
May 1, 2026May 2026 monthly summary for esbmc/esbmc focused on hardening the IEEE 754 --ir-ieee path: Infinity handling, rounding for integer-to-floating-point casts, and expanded regression coverage. The work improves modeling accuracy, reduces spurious counterexamples, and strengthens test stability for future changes.
3 Commits • 1 Features
May 1, 2026May 2026 monthly summary for esbmc/esbmc focused on hardening the IEEE 754 --ir-ieee path: Infinity handling, rounding for integer-to-floating-point casts, and expanded regression coverage. The work improves modeling accuracy, reduces spurious counterexamples, and strengthens test stability for future changes.
May 2026
April 2026
22 Commits • 16 Features
Apr 1, 2026April 2026 monthly summary: Implemented comprehensive theorem-driven interval lifting across core IEEE-754 operations, enhanced interval metadata propagation, expanded regression coverage, and fixed encoding issues. Delivered end-to-end interval lifting for ieee_add, ieee_sub, ieee_mul, and ieee_div across all rounding modes (RNE, RNA, RUP, RDN, RTZ); enabled interval reuse across assignments to preserve lifted bounds; added extensive regression tests for tracked vs fresh operands and strengthened tracked-sub expectations; stabilized encoding paths under --ir-ieee by fixing constant_floatbv handling and isinf/isfinite semantics.
April 2026
22 Commits • 16 Features
Apr 1, 2026April 2026 monthly summary: Implemented comprehensive theorem-driven interval lifting across core IEEE-754 operations, enhanced interval metadata propagation, expanded regression coverage, and fixed encoding issues. Delivered end-to-end interval lifting for ieee_add, ieee_sub, ieee_mul, and ieee_div across all rounding modes (RNE, RNA, RUP, RDN, RTZ); enabled interval reuse across assignments to preserve lifted bounds; added extensive regression tests for tracked vs fresh operands and strengthened tracked-sub expectations; stabilized encoding paths under --ir-ieee by fixing constant_floatbv handling and isinf/isfinite semantics.
March 2026
9 Commits • 3 Features
Mar 1, 2026March 2026 performance month focused on advancing real-number and floating-point reasoning in the SMT layer of esbmc/esbmc, delivering precision-driven enclosures and broader rounding-mode support. Key work includes integration of real-number enclosure generation into the SMT core with regression tests, expansion to theorem-driven enclosures for all IEEE-754 rounding modes, groundwork for interval lifting in RNE addition, and a user-facing CLI rename to reflect IEEE-focused behavior. Regression suites were expanded to validate correctness, SMT structure, and compatibility across modes.
9 Commits • 3 Features
Mar 1, 2026March 2026 performance month focused on advancing real-number and floating-point reasoning in the SMT layer of esbmc/esbmc, delivering precision-driven enclosures and broader rounding-mode support. Key work includes integration of real-number enclosure generation into the SMT core with regression tests, expansion to theorem-driven enclosures for all IEEE-754 rounding modes, groundwork for interval lifting in RNE addition, and a user-facing CLI rename to reflect IEEE-focused behavior. Regression suites were expanded to validate correctness, SMT structure, and compatibility across modes.
March 2026
Activity
Loading activity data...
Quality Metrics
Correctness97.2%
Maintainability82.4%
Architecture92.6%
Performance82.4%
AI Usage28.4%
Skills & Technologies
Programming Languages
CC++
Technical Skills
C programmingC++C++ developmentC++ programmingC/C++ developmentC/C++ programmingCode RefactoringFloating Point ArithmeticFormal VerificationNumerical methodsSMT SolversSMT solversSoftware ArchitectureStatic AnalysisTesting
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline