Separation Logic (II) Acknowledgment: slides taken from Reynolds’ mini-course CS 818A3

Specifications Partial correctness: Total correctness: Note the spec now requires c does not abort.

Examples

The Frame Rule (O’Hearn) (FR)

Why the Frame Rule is Sound

Inference Rules for Mutation One rule implies another.

Inference Rules for Deallocation

Inference Rules for Allocation

Rules for Nonoverwriting Allocation

Rules for General Allocation

Rules for General Allocation (2)

An Inadequate Local Rule by taking r to be emp

An Inadequate Local Rule (2)

An Adequate Local Rule

Rules for Nonoverwriting Lookup

Rules for General Lookup

Rules for General Lookup (2)

From (LKL) to (LKG)

From (LKG) to (LKL)

Example: Gluing Records

Another Example: Relative Pointers