generate_preset_pass_manager generates transpiler error on efficientSU2 at 12 qubits #11784
Description
Environment
- Qiskit version: 1.0.0rc1 or 0.45.3
- Python version: 3.12
- Operating system: Linux
What is happening?
Running benchmarks that were presented at Summit now error when using generate_preset_pass_manager.
It fails at 12 qubits with the error:
TranspilerError: 'Fewer qubits in the circuit (12) than the coupling map (127). Have you run a layout pass and then expanded your DAG with ancillas? See FullAncillaAllocation, EnlargeWithAncilla and ApplyLayout.'
Oddly enough it works for smaller numbers .
How can we reproduce the issue?
service = QiskitRuntimeService()
backend = service.get_backend('ibm_kyiv')
target = backend.target
pm = generate_preset_pass_manager(target=target, optimization_level=3)
qubits = list(range(2, 128))
qiskit_times = []
qiskit_depth = []
qiskit_2q = []
for N in qubits:
print('Starting', N, 'qubits')
qc = EfficientSU2(N, entanglement='circular')
print('circuit building done')
st = time.perf_counter()
trans_qc = pm.run(qc)
#trans_qc = transpile(qc, backend, optimization_level=3)
fin = time.perf_counter()
qiskit_times.append(fin-st)
qiskit_depth.append(trans_qc.depth())
qiskit_2q.append(trans_qc.count_ops().get('cx', 0))
print('Qiskit', fin-st, qiskit_2q[-1])
print()What should happen?
It should work like it did in previous versions
Any suggestions?
No response