Investigate sqlite3VdbeExec in {{artifact_path}} statically, starting from:
- cannot open savepoint - SQL statements in progress
- cannot release savepoint - SQL statements in progress

Establish the format-owning implementation despite same-name callable entries.
Reuse one retained VM capture and selected structured facts. Locate the shared
recovered error CALL, the block containing it, and the PHI alternatives for its
format argument, including each incoming edge binding and passing storage.

For that shared-call block, obtain the complete direct control-dependence set
in the retained recovered CFG. Then obtain the direct controllers of each of
those controller blocks: exactly one additional level, not a transitive closure.
Keep the two levels separate. For every conditional controller in these sets,
report its branch operation, both successor-edge IDs/destinations/polarities,
condition identity/test, and Boolean definition. Trace operands to constants
and LOAD boundaries, preserving SSA identity, input indexes, widths and signedness.
Which conditions share exactly the same loaded SSA value? Are matching storage
coordinates enough to equate the other loaded values?

Explain the alternative guard combinations in this local two-level fragment.
Does the list of control-dependence relations mean that all listed predicates
must hold simultaneously? Use the recovered value identities and edge choices
to support the answer; do not claim these are all earlier runtime conditions.

For each direct controller of the shared-call block, supply one recovered-edge
witness from the selected successor to that block, and one from the alternative
successor to any recovered zero-successor exit that avoids the shared-call block.
Give block sequences and edge IDs. Any valid witnesses suffice; shortest paths
are unnecessary. These graph paths do not prove runtime feasibility.

Check the four selected guard sites, relevant load/spill instructions, format
setups and shared machine CALL with focused instruction windows. Separate native
optimized edge polarity/origins from actual machine branch transfers. Keep the
answer focused with real Evidence IDs, target digest and explicit recovered-graph,
alias, machine-flow, nontermination and runtime limits. Complete retained Evidence
remains available; do not return the complete C report or graph. Close the lease.