def test_local_solver_sa_ising():
model = LogicalModel(mtype="ising")
s = model.variables("s", shape=(2,))
model.add_interaction(s[0], coefficient=1.0)
model.add_interaction(s[1], coefficient=2.0)
model.add_interaction((s[0], s[1]), coefficient=-3.0)
model.offset(10.0)
solver = LocalSolver()
sampleset1 = solver.solve(model.to_physical(), seed=12345)
assert sampleset1.variables == ["s[0]", "s[1]"]
assert len(sampleset1.record) == 1
# Check the ground state
assert np.array_equal(sampleset1.record[0].sample, [-1, 1])
assert sampleset1.record[0].energy == 6.0
assert sampleset1.record[0].num_occurrences == 1
# Check the second solve with the same solver instance
sampleset2 = solver.solve(model.to_physical(), seed=54321)
assert sampleset2.variables == ["s[0]", "s[1]"]
assert len(sampleset2.record) == 1
# Check the ground state
assert np.array_equal(sampleset2.record[0].sample, [-1, 1])
assert sampleset2.record[0].energy == 6.0
assert sampleset2.record[0].num_occurrences == 1
def test_sawatabi_solver_invalid_reverse_options():
model = LogicalModel(mtype="ising")
x = model.variables("x", shape=(2,))
for i in range(2):
model.add_interaction(x[i], coefficient=-1.0)
solver = SawatabiSolver()
with pytest.raises(ValueError):
solver.solve(model.to_physical(), reverse_options={"reverse_period": 5})
with pytest.raises(ValueError):
solver.solve(model.to_physical(), reverse_options={"reverse_temperature": 10.0})
def test_sawatabi_solver_reuse_solver_instance():
model = LogicalModel(mtype="ising")
x = model.variables("x", shape=(2,))
for i in range(2):
model.add_interaction(x[i], coefficient=-1.0)
solver = SawatabiSolver()
sampleset_1 = solver.solve(model.to_physical(), num_reads=1, num_sweeps=10, cooling_rate=0.5, seed=12345)
assert np.array_equal(sampleset_1.record[0].sample, [-1, -1])
assert sampleset_1.record[0].energy == -2.0
sampleset_2 = solver.solve(model.to_physical(), num_reads=1, num_sweeps=10, cooling_rate=0.5, seed=12345)
assert np.array_equal(sampleset_2.record[0].sample, [-1, -1])
assert sampleset_2.record[0].energy == -2.0
def test_logical_model_to_physical(mtype):
model = LogicalModel(mtype=mtype)
x = model.variables("x", shape=(2,))
model.add_interaction(x[0], coefficient=1.0)
model.add_interaction((x[0], x[1]), coefficient=-1.0)
model._update_interactions_dataframe_from_arrays() # Update the interactions DataFrame for debug
assert model._interactions[model._interactions["name"] == "x[0]"]["dirty"].values[0]
assert model._interactions[model._interactions["name"] == "x[0]*x[1]"]["dirty"].values[0]
physical = model.to_physical()
model._update_interactions_dataframe_from_arrays() # Update the interactions DataFrame for debug
assert physical.get_mtype() == mtype
assert len(physical._raw_interactions[constants.INTERACTION_LINEAR]) == 1
assert len(physical._raw_interactions[constants.INTERACTION_QUADRATIC]) == 1
assert physical._raw_interactions[constants.INTERACTION_LINEAR]["x[0]"] == 1.0
assert physical._raw_interactions[constants.INTERACTION_QUADRATIC][("x[0]", "x[1]")] == -1.0
assert not model._interactions[model._interactions["name"] == "x[0]"]["dirty"].values[0]
assert not model._interactions[model._interactions["name"] == "x[0]*x[1]"]["dirty"].values[0]
assert physical._label_to_index["x[0]"] == 0
assert physical._label_to_index["x[1]"] == 1
assert len(physical._label_to_index) == 2
assert physical._index_to_label[0] == "x[0]"
assert physical._index_to_label[1] == "x[1]"
assert len(physical._index_to_label) == 2
def test_sawatabi_solver_with_initial_states_reverse():
model = LogicalModel(mtype="ising")
x = model.variables("x", shape=(6,))
for i in range(6):
model.add_interaction(x[i], coefficient=10.0)
solver = SawatabiSolver()
initial_states = [
{
"x[0]": -1,
"x[1]": -1,
"x[2]": -1,
"x[3]": -1,
"x[4]": -1,
"x[5]": -1,
},
]
sampleset = solver.solve(
model.to_physical(),
num_reads=1,
num_sweeps=10,
initial_states=initial_states,
reverse_options={"reverse_period": 5, "reverse_temperature": 10.0},
seed=12345,
)
assert len(sampleset.record) == 1
# Check the ground state
assert np.array_equal(sampleset.record[0].sample, [1, 1, 1, 1, 1, 1])
assert sampleset.record[0].energy == -60.0
assert sampleset.record[0].num_occurrences == 1
def test_sawatabi_solver_with_initial_states_qubo():
model = LogicalModel(mtype="qubo")
x = model.variables("x", shape=(6,))
for i in range(6):
model.add_interaction(x[i], coefficient=-1.0)
solver = SawatabiSolver()
initial_states = [
{
"x[0]": 1,
"x[1]": 0,
"x[2]": 1,
"x[3]": 0,
"x[4]": 1,
"x[5]": 0,
},
]
sampleset = solver.solve(model.to_physical(), num_reads=1, num_sweeps=10, cooling_rate=0.5, initial_states=initial_states, seed=12345)
assert len(sampleset.record) == 1
# Check the ground state
assert np.array_equal(sampleset.record[0].sample, [0, 0, 0, 0, 0, 0])
assert sampleset.record[0].energy == 0.0
assert sampleset.record[0].num_occurrences == 1
def test_sawatabi_solver_with_initial_states_ising():
model = LogicalModel(mtype="ising")
x = model.variables("x", shape=(12,))
for i in range(12):
model.add_interaction(x[i], coefficient=-1.0)
solver = SawatabiSolver()
initial_states = [
{
"x[0]": 1,
"x[1]": -1,
"x[2]": -1,
"x[3]": -1,
"x[4]": -1,
"x[5]": -1,
"x[6]": -1,
"x[7]": -1,
"x[8]": -1,
"x[9]": -1,
"x[10]": -1,
"x[11]": -1,
},
]
sampleset = solver.solve(model.to_physical(), num_reads=1, num_sweeps=1, pickup_mode="sequential", initial_temperature=1e-9, initial_states=initial_states)
assert len(sampleset.record) == 1
# Check the ground state
assert np.array_equal(sampleset.record[0].sample, [-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1])
assert sampleset.record[0].energy == -12.0
assert sampleset.record[0].num_occurrences == 1
def physical():
model = LogicalModel(mtype="qubo")
x = model.variables("x", shape=(2, ))
model.add_interaction(x[0], coefficient=1.0)
model.add_interaction((x[0], x[1]), coefficient=-1.0)
physical = model.to_physical()
return physical
def _create_ising_model_for_eq():
model = LogicalModel(mtype="ising")
x = model.variables(name="x", shape=(3, ))
model.delete_variable(x[0])
model.add_interaction(x[1], coefficient=1.0)
model.add_interaction(x[2], coefficient=2.0)
model.add_interaction((x[1], x[2]), coefficient=3.0)
return model.to_physical()
def qubo():
model = LogicalModel(mtype="qubo")
x = model.variables(name="x", shape=(3, ))
model.delete_variable(x[0])
model.add_interaction(x[1], coefficient=1.0)
model.add_interaction(x[2], coefficient=2.0)
model.add_interaction((x[1], x[2]), coefficient=3.0)
return model.to_physical()
def test_optigan_solver_with_ising_model_fails():
model = LogicalModel(mtype="ising")
s = model.variables("s", shape=(2, ))
model.add_interaction((s[0], s[1]), coefficient=-1.0)
physical = model.to_physical()
solver = OptiganSolver()
with pytest.raises(ValueError):
solver.solve(physical)
def test_optigan_solver_with_empty_config_fails():
model = LogicalModel(mtype="qubo")
x = model.variables("x", shape=(2, ))
model.add_interaction((x[0], x[1]), coefficient=-1.0)
physical = model.to_physical()
solver = OptiganSolver(config="/tmp/.optigan.yml")
with pytest.raises(FileNotFoundError):
solver.solve(physical)
def test_sawatabi_solver_invalid_pickup_mode():
model = LogicalModel(mtype="ising")
x = model.variables("x", shape=(2,))
for i in range(2):
model.add_interaction(x[i], coefficient=-1.0)
solver = SawatabiSolver()
with pytest.raises(ValueError):
solver.solve(model.to_physical(), pickup_mode="invalid")
def test_sawatabi_solver_with_initial_states_fails():
model = LogicalModel(mtype="ising")
x = model.variables("x", shape=(2,))
for i in range(2):
model.add_interaction(x[i], coefficient=-1.0)
solver = SawatabiSolver()
initial_states = [{"x[0]": 1, "x[1]": 1}]
with pytest.raises(ValueError):
solver.solve(model.to_physical(), num_reads=2, initial_states=initial_states)
def test_local_solver_default_beta_range():
model = LogicalModel(mtype="ising")
s = model.variables("s", shape=(2,))
model.add_interaction(s[0], coefficient=1.0)
model.add_interaction(s[1], coefficient=2.0)
model.add_interaction((s[0], s[1]), coefficient=-3.0)
solver = LocalSolver()
beta_range = solver.default_beta_range(model.to_physical())
assert beta_range == [0.13862943611198905, 4.605170185988092]
def test_sawatabi_solver_with_stats():
model = LogicalModel(mtype="ising")
x = model.variables("x", shape=(2,))
for i in range(2):
model.add_interaction(x[i], coefficient=-1.0)
solver = SawatabiSolver()
sampleset, stats = solver.solve(model.to_physical(), num_reads=1, num_sweeps=10, cooling_rate=0.5, seed=12345, need_stats=True)
assert stats[0]["acceptance_history"][-1] == 0
assert stats[0]["energy_history"][-1] == -2.0
assert stats[0]["temperature_history"] == [100.0, 50.0, 25.0, 12.5, 6.25, 3.125, 1.5625, 0.78125, 0.390625, 0.1953125]
def test_sawatabi_solver_n_hot_ising_with_deleting(n, s, i):
# n out of (s - 1) variables should be 1
model = LogicalModel(mtype="ising")
x = model.variables("x", shape=(s,))
model.add_constraint(NHotConstraint(variables=x, n=n))
model.delete_variable(x[i])
solver = SawatabiSolver()
sampleset = solver.solve(model.to_physical(), seed=12345)
result = np.array(sampleset.record[0].sample)
assert np.count_nonzero(result == 1) == n
assert np.count_nonzero(result == -1) == s - n - 1
def test_sawatabi_solver_n_hot_qubo(n, s):
# n out of s variables should be 1
model = LogicalModel(mtype="qubo")
x = model.variables("x", shape=(s,))
model.add_constraint(NHotConstraint(variables=x, n=n))
solver = SawatabiSolver()
sampleset = solver.solve(model.to_physical(), seed=12345)
result = np.array(sampleset.record[0].sample)
assert np.count_nonzero(result == 1) == n
assert np.count_nonzero(result == 0) == s - n
# Execution time should be within practical seconds (20 sec).
assert sampleset.info["timing"]["execution_sec"] <= 20.0
def test_logical_model_to_physical_with_n_hot_constraint_qubo(n, s):
# n out of s variables should be 1
model = LogicalModel(mtype="qubo")
x = model.variables("x", shape=(s,))
model.add_constraint(NHotConstraint(x, n=n))
physical = model.to_physical()
for i in range(s):
assert physical._raw_interactions[constants.INTERACTION_LINEAR][f"x[{i}]"] == 2 * n - 1.0
for i in range(s):
for j in range(s):
l1 = f"x[{i}]"
l2 = f"x[{j}]"
if l1 < l2:
assert physical._raw_interactions[constants.INTERACTION_QUADRATIC][(l1, l2)] == -2.0
def test_local_solver_zero_or_one_hot_qubo(n):
model = LogicalModel(mtype="qubo")
x = model.variables("x", shape=(n,))
model.add_constraint(ZeroOrOneHotConstraint(variables=x))
solver = LocalSolver()
physical = model.to_physical()
for seed in [11, 22, 33, 44, 55]:
sampleset = solver.solve(physical, seed=seed)
result = np.array(sampleset.record[0].sample)
assert np.count_nonzero(result == 1) in [0, 1]
# Execution time should be within practical seconds (20 sec).
assert sampleset.info["timing"]["execution_sec"] <= 20.0
def test_local_solver_n_hot_ising(n, s):
# n out of s spins should be +1
model = LogicalModel(mtype="ising")
x = model.variables("x", shape=(s,))
model.add_constraint(NHotConstraint(variables=x, n=n))
solver = LocalSolver()
physical = model.to_physical()
for seed in [11, 22, 33, 44, 55]:
sampleset = solver.solve(physical, seed=seed)
result = np.array(sampleset.record[0].sample)
assert np.count_nonzero(result == 1) == n
assert np.count_nonzero(result == -1) == s - n
# Execution time should be within practical seconds (20 sec).
assert sampleset.info["timing"]["execution_sec"] <= 20.0
def test_sawatabi_solver_ising():
model = LogicalModel(mtype="ising")
s = model.variables("s", shape=(2,))
model.add_interaction(s[0], coefficient=1.0)
model.add_interaction(s[1], coefficient=2.0)
model.add_interaction((s[0], s[1]), coefficient=-3.0)
model.offset(10.0)
solver = SawatabiSolver()
sampleset = solver.solve(model.to_physical(), num_reads=2, num_sweeps=10, cooling_rate=0.5, initial_temperature=10.0, seed=12345)
assert sampleset.variables == ["s[0]", "s[1]"]
assert len(sampleset.record) == 1
# Check the ground state
assert np.array_equal(sampleset.record[0].sample, [-1, 1])
assert sampleset.record[0].energy == 6.0
assert sampleset.record[0].num_occurrences == 2
def test_sawatabi_solver_qubo():
model = LogicalModel(mtype="qubo")
x = model.variables("x", shape=(2,))
model.add_interaction(x[0], coefficient=1.0)
model.add_interaction(x[1], coefficient=2.0)
model.add_interaction((x[0], x[1]), coefficient=-5.0)
model.offset(10.0)
solver = SawatabiSolver()
sampleset = solver.solve(model.to_physical(), num_reads=1, num_sweeps=10, cooling_rate=0.55, seed=12345)
assert sampleset.variables == ["x[0]", "x[1]"]
assert len(sampleset.record) == 1
# Check the ground state
record = sorted(sampleset.record, key=lambda r: r.energy) # sort by energy
assert np.array_equal(record[0].sample, [0, 1])
assert record[0].energy == 8.0
def test_logical_model_to_physical_with_n_hot_constraint_ising(n, s):
# n out of s spins should be +1
model = LogicalModel(mtype="ising")
x = model.variables("x", shape=(s,))
model.add_constraint(NHotConstraint(x, n=n))
physical = model.to_physical()
for i in range(s):
if s != 2 * n:
assert physical._raw_interactions[constants.INTERACTION_LINEAR][f"x[{i}]"] == -0.5 * (s - 2 * n)
else:
assert f"x[{i}]" not in physical._raw_interactions[constants.INTERACTION_LINEAR]
for i in range(s):
for j in range(s):
l1 = f"x[{i}]"
l2 = f"x[{j}]"
if l1 < l2:
assert physical._raw_interactions[constants.INTERACTION_QUADRATIC][(l1, l2)] == -0.5
def test_local_solver_sa_qubo():
model = LogicalModel(mtype="qubo")
x = model.variables("x", shape=(2,))
model.add_interaction(x[0], coefficient=1.0)
model.add_interaction(x[1], coefficient=2.0)
model.add_interaction((x[0], x[1]), coefficient=-5.0)
model.offset(10.0)
solver = LocalSolver(exact=False)
sampleset = solver.solve(model.to_physical(), seed=12345)
assert sampleset.variables == ["x[0]", "x[1]"]
assert len(sampleset.record) == 1
# Check the ground state
assert np.array_equal(sampleset.record[0].sample, [0, 1])
assert sampleset.record[0].energy == 8.0
assert sampleset.record[0].num_occurrences == 1
def test_local_solver_equality_qubo(m, n):
model = LogicalModel(mtype="qubo")
x = model.variables("x", shape=(m,))
y = model.variables("y", shape=(n,))
model.add_constraint(EqualityConstraint(variables_1=x, variables_2=y))
solver = LocalSolver()
physical = model.to_physical()
for seed in [11, 22, 33, 44, 55]:
sampleset = solver.solve(physical, seed=seed)
result = np.array(sampleset.record[0].sample)
result_1 = result[0:m]
result_2 = result[m : (m + n)] # noqa: E203
assert np.count_nonzero(result_1 == 1) == np.count_nonzero(result_2 == 1)
# Execution time should be within practical seconds (20 sec).
assert sampleset.info["timing"]["execution_sec"] <= 20.0
def test_sawatabi_solver_qubo_without_active_var():
model = LogicalModel(mtype="qubo")
x = model.variables("x", shape=(2, 2))
model.add_interaction(x[0, 1], coefficient=1.0)
model.add_interaction((x[1, 0], x[1, 1]), coefficient=2.0)
physical = model.to_physical()
assert len(physical._label_to_index) == 3
assert len(physical._index_to_label) == 3
solver = SawatabiSolver()
sampleset = solver.solve(physical, seed=12345)
assert sampleset.variables == ["x[0][1]", "x[1][0]", "x[1][1]"]
assert len(sampleset.record) == 1
# Check the ground state
assert np.array_equal(sampleset.record[0].sample, [1, 1, 1])
assert sampleset.record[0].energy == -3.0
assert sampleset.record[0].num_occurrences == 1
def test_local_solver_exact_qubo():
model = LogicalModel(mtype="qubo")
x = model.variables("x", shape=(2,))
model.add_interaction(x[0], coefficient=1.0)
model.add_interaction(x[1], coefficient=2.0)
model.add_interaction((x[0], x[1]), coefficient=-5.0)
solver = LocalSolver(exact=True)
sampleset = solver.solve(model.to_physical())
assert sampleset.variables == ["x[0]", "x[1]"]
assert len(sampleset.record) == 4
for r in sampleset.record:
# Check the ground state
if np.array_equal(r.sample, [0, 1]):
assert r.energy == -2.0
assert r.num_occurrences == 1
break
else:
assert False
def test_sawatabi_solver_ising_without_active_var():
model = LogicalModel(mtype="ising")
s = model.variables("s", shape=(2, 2))
model.add_interaction(s[0, 1], coefficient=1.0)
model.add_interaction((s[1, 0], s[1, 1]), coefficient=2.0)
physical = model.to_physical()
assert len(physical._label_to_index) == 3
assert len(physical._index_to_label) == 3
solver = SawatabiSolver()
sampleset = solver.solve(physical, num_reads=10, seed=12345)
assert sampleset.variables == ["s[0][1]", "s[1][0]", "s[1][1]"]
assert len(sampleset.record) == 2
# Check the ground state
assert np.array_equal(sampleset.record[0].sample, [1, -1, -1])
assert np.array_equal(sampleset.record[1].sample, [1, 1, 1])
assert sampleset.record[0].energy == -3
assert sampleset.record[1].energy == -3
assert sampleset.record[0].num_occurrences + sampleset.record[1].num_occurrences == 10
def test_logical_model_delete_dealing_with_nhot_constraints_qubo():
model = LogicalModel(mtype="qubo")
x = model.variables("x", shape=(4, ))
default_label = "Default N-hot Constraint"
model.add_constraint(NHotConstraint(x, n=1, strength=1.0))
assert len(model.get_constraints()) == 1
assert default_label in model.get_constraints()
assert model.get_constraints_by_label(default_label)._n == 1
assert len(model.get_constraints_by_label(default_label)._variables) == 4
model.delete_variable(x[0])
assert len(model.get_constraints()) == 1
assert default_label in model.get_constraints()
assert model.get_constraints_by_label(default_label)._n == 1
assert len(model.get_constraints_by_label(default_label)._variables) == 3
physical = model.to_physical()
assert physical._raw_interactions[
constants.INTERACTION_LINEAR]["x[1]"] == 1.0
assert physical._raw_interactions[constants.INTERACTION_QUADRATIC][(
"x[1]", "x[2]")] == -2.0
