Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr BuildSysPro_BuildSysPro.IBPSA.Fluid.Movers.BaseClasses.Validation.EulerComparison.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildSysPro 3.6.0-master/package.mo", uses=false) Using package BuildSysPro with version 3.6.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildSysPro 3.6.0-master/package.mo) Using package Modelica with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo) Using package Complex with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo) Using package ModelicaServices with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo) Running command: "" <> buildModelFMU(BuildSysPro.IBPSA.Fluid.Movers.BaseClasses.Validation.EulerComparison,fileNamePrefix="BuildSysPro_BuildSysPro_IBPSA_Fluid_Movers_BaseClasses_Validation_EulerComparison",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(BuildSysPro.IBPSA.Fluid.Movers.BaseClasses.Validation.EulerComparison,fileNamePrefix="BuildSysPro_BuildSysPro_IBPSA_Fluid_Movers_BaseClasses_Validation_EulerComparison",fmuType="me",version="2.0",platforms={"static"}) Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.005148/0.005148, allocations: 97.11 kB / 15.73 MB, free: 5.988 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001466/0.001466, allocations: 187 kB / 16.67 MB, free: 5.918 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.398/1.398, allocations: 222.9 MB / 240.4 MB, free: 4.316 MB / 190.1 MB [/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildSysPro 3.6.0-master/Building/BuildingEnvelope/HeatTransfer/package.mo:2:1-40:17:writable] Warning: Soil_case_nappe was referenced in the package.order file, but was not found in package.mo, Soil_case_nappe/package.mo or Soil_case_nappe.mo. Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildSysPro 3.6.0-master/package.mo): time 1.02/1.02, allocations: 143.3 MB / 433.8 MB, free: 11.53 MB / 350.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001867/0.001868, allocations: 67.91 kB / 0.5953 GB, free: 8.656 MB / 0.4981 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.3692/0.3711, allocations: 82.02 MB / 0.6754 GB, free: 1.004 MB / 0.4981 GB Notification: Performance of NFInst.instantiate(BuildSysPro.IBPSA.Fluid.Movers.BaseClasses.Validation.EulerComparison): time 0.005434/0.3766, allocations: 3.889 MB / 0.6792 GB, free: 13.95 MB / 0.5137 GB Notification: Performance of NFInst.instExpressions: time 0.008695/0.3853, allocations: 4.968 MB / 0.6841 GB, free: 10.03 MB / 0.5137 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0007497/0.3861, allocations: 17.38 kB / 0.6841 GB, free: 10.03 MB / 0.5137 GB Notification: Performance of NFTyping.typeComponents: time 0.004245/0.3903, allocations: 1.428 MB / 0.6855 GB, free: 9.168 MB / 0.5137 GB Notification: Performance of NFTyping.typeBindings: time 0.002093/0.3925, allocations: 0.7986 MB / 0.6863 GB, free: 8.559 MB / 0.5137 GB Notification: Performance of NFTyping.typeClassSections: time 0.002033/0.3945, allocations: 0.8456 MB / 0.6871 GB, free: 7.984 MB / 0.5137 GB Notification: Performance of NFFlatten.flatten: time 0.02012/0.4146, allocations: 12.84 MB / 0.6996 GB, free: 13.39 MB / 0.5294 GB Notification: Performance of NFFlatten.resolveConnections: time 0.000305/0.415, allocations: 105.9 kB / 0.6997 GB, free: 13.27 MB / 0.5294 GB Notification: Performance of NFEvalConstants.evaluate: time 0.001062/0.416, allocations: 0.5723 MB / 0.7003 GB, free: 12.7 MB / 0.5294 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0008686/0.4169, allocations: 0.6187 MB / 0.7009 GB, free: 12.07 MB / 0.5294 GB Notification: Performance of NFPackage.collectConstants: time 0.0001618/0.4171, allocations: 72 kB / 0.701 GB, free: 12 MB / 0.5294 GB Notification: Performance of NFFlatten.collectFunctions: time 0.001672/0.4188, allocations: 0.8384 MB / 0.7018 GB, free: 11.16 MB / 0.5294 GB Notification: Performance of NFScalarize.scalarize: time 0.0008198/0.4196, allocations: 0.8103 MB / 0.7026 GB, free: 10.35 MB / 0.5294 GB Notification: Performance of NFVerifyModel.verify: time 0.0009896/0.4206, allocations: 0.878 MB / 0.7034 GB, free: 9.469 MB / 0.5294 GB Notification: Performance of NFConvertDAE.convert: time 0.003641/0.4243, allocations: 2.766 MB / 0.7061 GB, free: 6.691 MB / 0.5294 GB Notification: Performance of FrontEnd - DAE generated: time 5.77e-06/0.4243, allocations: 0 / 0.7061 GB, free: 6.691 MB / 0.5294 GB Notification: Performance of FrontEnd: time 2.514e-06/0.4243, allocations: 0 / 0.7061 GB, free: 6.691 MB / 0.5294 GB Notification: Performance of Transformations before backend: time 4.486e-05/0.4243, allocations: 0 / 0.7061 GB, free: 6.691 MB / 0.5294 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 44 * Number of variables: 44 Notification: Performance of Generate backend data structure: time 0.004662/0.429, allocations: 2.358 MB / 0.7084 GB, free: 4.27 MB / 0.5294 GB Notification: Performance of prepare preOptimizeDAE: time 4.762e-05/0.4291, allocations: 12.02 kB / 0.7084 GB, free: 4.258 MB / 0.5294 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 7.352e-05/0.4292, allocations: 54.55 kB / 0.7085 GB, free: 4.195 MB / 0.5294 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.002696/0.4319, allocations: 498.3 kB / 0.709 GB, free: 3.707 MB / 0.5294 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.009974/0.4418, allocations: 5.686 MB / 0.7145 GB, free: 13.95 MB / 0.545 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 4.468e-05/0.4419, allocations: 24 kB / 0.7145 GB, free: 13.92 MB / 0.545 GB Notification: Performance of preOpt expandDerOperator (simulation): time 8.414e-05/0.442, allocations: 28 kB / 0.7146 GB, free: 13.89 MB / 0.545 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001374/0.4434, allocations: 0.6572 MB / 0.7152 GB, free: 13.23 MB / 0.545 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.467e-05/0.4434, allocations: 0 / 0.7152 GB, free: 13.23 MB / 0.545 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 4.693e-05/0.4435, allocations: 11.94 kB / 0.7152 GB, free: 13.22 MB / 0.545 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 8.136e-06/0.4435, allocations: 8 kB / 0.7152 GB, free: 13.21 MB / 0.545 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001596/0.4451, allocations: 0.5269 MB / 0.7158 GB, free: 12.68 MB / 0.545 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.004217/0.4493, allocations: 2.352 MB / 0.718 GB, free: 10.27 MB / 0.545 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001768/0.4511, allocations: 0.7013 MB / 0.7187 GB, free: 9.562 MB / 0.545 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0007845/0.4519, allocations: 284.7 kB / 0.719 GB, free: 9.281 MB / 0.545 GB Notification: Performance of preOpt evalFunc (simulation): time 3.952e-05/0.452, allocations: 4 kB / 0.719 GB, free: 9.277 MB / 0.545 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.163e-05/0.452, allocations: 34.56 kB / 0.719 GB, free: 9.234 MB / 0.545 GB Notification: Performance of pre-optimization done (n=21): time 2.003e-06/0.452, allocations: 3.938 kB / 0.719 GB, free: 9.23 MB / 0.545 GB Notification: Performance of matching and sorting (n=21): time 0.00307/0.4551, allocations: 1.045 MB / 0.7201 GB, free: 8.18 MB / 0.545 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.581e-05/0.4552, allocations: 55.34 kB / 0.7201 GB, free: 8.113 MB / 0.545 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.004537/0.4597, allocations: 3.048 MB / 0.7231 GB, free: 5.039 MB / 0.545 GB Notification: Performance of collectPreVariables (initialization): time 0.0001124/0.4598, allocations: 29.7 kB / 0.7231 GB, free: 5.004 MB / 0.545 GB Notification: Performance of collectInitialEqns (initialization): time 0.0007529/0.4606, allocations: 0.7042 MB / 0.7238 GB, free: 4.293 MB / 0.545 GB Notification: Performance of collectInitialBindings (initialization): time 0.0001141/0.4607, allocations: 83.38 kB / 0.7239 GB, free: 4.211 MB / 0.545 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0005282/0.4613, allocations: 350.4 kB / 0.7242 GB, free: 3.863 MB / 0.545 GB Notification: Performance of setup shared object (initialization): time 0.0001187/0.4614, allocations: 301.1 kB / 0.7245 GB, free: 3.566 MB / 0.545 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.001809/0.4632, allocations: 1.095 MB / 0.7256 GB, free: 2.465 MB / 0.545 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.002182/0.4654, allocations: 1.445 MB / 0.727 GB, free: 0.9102 MB / 0.545 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.003687/0.4691, allocations: 2.325 MB / 0.7293 GB, free: 14.5 MB / 0.5606 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.104e-05/0.4691, allocations: 7.938 kB / 0.7293 GB, free: 14.49 MB / 0.5606 GB Notification: Performance of matching and sorting (n=196) (initialization): time 0.004875/0.474, allocations: 2.75 MB / 0.732 GB, free: 11.73 MB / 0.5606 GB Notification: Performance of prepare postOptimizeDAE: time 2.443e-05/0.4741, allocations: 8 kB / 0.732 GB, free: 11.73 MB / 0.5606 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.714e-05/0.4741, allocations: 8 kB / 0.732 GB, free: 11.72 MB / 0.5606 GB Notification: Performance of postOpt tearingSystem (initialization): time 3.461e-05/0.4742, allocations: 15.94 kB / 0.732 GB, free: 11.7 MB / 0.5606 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001136/0.4753, allocations: 259.7 kB / 0.7322 GB, free: 11.45 MB / 0.5606 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 2.718e-05/0.4753, allocations: 15.94 kB / 0.7322 GB, free: 11.43 MB / 0.5606 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001762/0.4771, allocations: 215.5 kB / 0.7325 GB, free: 11.22 MB / 0.5606 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0002145/0.4773, allocations: 87.91 kB / 0.7325 GB, free: 11.14 MB / 0.5606 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.00258/0.4799, allocations: 1.389 MB / 0.7339 GB, free: 9.738 MB / 0.5606 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.002148/0.4821, allocations: 1.296 MB / 0.7352 GB, free: 8.336 MB / 0.5606 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.003428/0.4856, allocations: 2.015 MB / 0.7371 GB, free: 6.23 MB / 0.5606 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 1.105e-05/0.4856, allocations: 4 kB / 0.7371 GB, free: 6.227 MB / 0.5606 GB Notification: Performance of matching and sorting (n=196) (initialization_lambda0): time 0.004893/0.4905, allocations: 2.433 MB / 0.7395 GB, free: 3.785 MB / 0.5606 GB Notification: Performance of prepare postOptimizeDAE: time 2.883e-05/0.4906, allocations: 9.719 kB / 0.7395 GB, free: 3.777 MB / 0.5606 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.804e-05/0.4906, allocations: 8 kB / 0.7395 GB, free: 3.77 MB / 0.5606 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.869e-05/0.4906, allocations: 8 kB / 0.7395 GB, free: 3.762 MB / 0.5606 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.00114/0.4918, allocations: 255.6 kB / 0.7398 GB, free: 3.512 MB / 0.5606 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 2.541e-05/0.4918, allocations: 19.88 kB / 0.7398 GB, free: 3.492 MB / 0.5606 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.00185/0.4937, allocations: 191.5 kB / 0.74 GB, free: 3.305 MB / 0.5606 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001712/0.4939, allocations: 67.98 kB / 0.74 GB, free: 3.238 MB / 0.5606 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 31 * Number of states: 0 () * Number of discrete variables: 0 () * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (120): * Single equations (assignments): 116 * Array equations: 2 * Algorithm blocks: 0 * Record equations: 2 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of prepare postOptimizeDAE: time 0.000331/0.4942, allocations: 232 kB / 0.7403 GB, free: 3.004 MB / 0.5606 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0004615/0.4947, allocations: 186.7 kB / 0.7404 GB, free: 2.82 MB / 0.5606 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.002359/0.497, allocations: 0.8123 MB / 0.7412 GB, free: 1.996 MB / 0.5606 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.079e-05/0.4971, allocations: 7.938 kB / 0.7412 GB, free: 1.988 MB / 0.5606 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 5.119e-06/0.4971, allocations: 0 / 0.7412 GB, free: 1.988 MB / 0.5606 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 4.608e-06/0.4971, allocations: 4 kB / 0.7412 GB, free: 1.984 MB / 0.5606 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.001895/0.499, allocations: 1.095 MB / 0.7423 GB, free: 0.8359 MB / 0.5606 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 3.006e-06/0.499, allocations: 0 / 0.7423 GB, free: 0.8359 MB / 0.5606 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0005871/0.4996, allocations: 91.86 kB / 0.7424 GB, free: 0.7461 MB / 0.5606 GB Notification: Performance of postOpt tearingSystem (simulation): time 4.869e-06/0.4996, allocations: 0 / 0.7424 GB, free: 0.7461 MB / 0.5606 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 4.157e-05/0.4997, allocations: 16.12 kB / 0.7424 GB, free: 0.7305 MB / 0.5606 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 6.583e-06/0.4997, allocations: 3.938 kB / 0.7424 GB, free: 0.7266 MB / 0.5606 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.693e-06/0.4997, allocations: 0 / 0.7424 GB, free: 0.7266 MB / 0.5606 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.002147/0.5018, allocations: 0.8691 MB / 0.7433 GB, free: 15.84 MB / 0.5762 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0007929/0.5027, allocations: 391.5 kB / 0.7436 GB, free: 15.44 MB / 0.5762 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0003643/0.503, allocations: 8 kB / 0.7437 GB, free: 15.43 MB / 0.5762 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.001136/0.5042, allocations: 91.81 kB / 0.7437 GB, free: 15.34 MB / 0.5762 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 7.806e-05/0.5043, allocations: 19.92 kB / 0.7438 GB, free: 15.32 MB / 0.5762 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 5.289e-05/0.5043, allocations: 23.98 kB / 0.7438 GB, free: 15.3 MB / 0.5762 GB Notification: Performance of sorting global known variables: time 0.003527/0.5079, allocations: 2.099 MB / 0.7458 GB, free: 13.18 MB / 0.5762 GB Notification: Performance of sort global known variables: time 6.01e-07/0.5079, allocations: 4 kB / 0.7458 GB, free: 13.18 MB / 0.5762 GB Notification: Performance of remove unused functions: time 0.002347/0.5102, allocations: 0.6909 MB / 0.7465 GB, free: 12.49 MB / 0.5762 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 0 () * Number of discrete variables: 0 () * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (23): * Single equations (assignments): 23 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of Backend phase and start with SimCode phase: time 0.003319/0.5136, allocations: 1.677 MB / 0.7481 GB, free: 10.78 MB / 0.5762 GB Notification: Performance of simCode: created initialization part: time 0.005152/0.5188, allocations: 2.771 MB / 0.7509 GB, free: 8.012 MB / 0.5762 GB Notification: Performance of simCode: created event and clocks part: time 3.657e-06/0.5188, allocations: 0 / 0.7509 GB, free: 8.012 MB / 0.5762 GB Notification: Performance of simCode: created simulation system equations: time 0.0008544/0.5197, allocations: 297.9 kB / 0.7511 GB, free: 7.723 MB / 0.5762 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.003866/0.5235, allocations: 0.9128 MB / 0.752 GB, free: 6.824 MB / 0.5762 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.03379/0.5574, allocations: 19.77 MB / 0.7713 GB, free: 2.641 MB / 0.5919 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001359/0.5588, allocations: 1.428 MB / 0.7727 GB, free: 1.184 MB / 0.5919 GB Notification: Performance of simCode: alias equations: time 0.001927/0.5607, allocations: 0.5416 MB / 0.7733 GB, free: 0.6367 MB / 0.5919 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.001177/0.5619, allocations: 0.6711 MB / 0.7739 GB, free: 15.96 MB / 0.6075 GB Notification: Performance of SimCode: time 8.01e-07/0.5619, allocations: 8 kB / 0.7739 GB, free: 15.95 MB / 0.6075 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.1058/0.6678, allocations: 55.57 MB / 0.8282 GB, free: 9.273 MB / 0.6544 GB Notification: Performance of buildModelFMU: Generate platform static: time 12.42/13.08, allocations: 3.938 kB / 0.8282 GB, free: 9.27 MB / 0.6544 GB (rm -f BuildSysPro_BuildSysPro.IBPSA.Fluid.Movers.BaseClasses.Validation.EulerComparison.pipe ; mkfifo BuildSysPro_BuildSysPro.IBPSA.Fluid.Movers.BaseClasses.Validation.EulerComparison.pipe ; head -c 1048576 < BuildSysPro_BuildSysPro.IBPSA.Fluid.Movers.BaseClasses.Validation.EulerComparison.pipe >> ../files/BuildSysPro_BuildSysPro.IBPSA.Fluid.Movers.BaseClasses.Validation.EulerComparison.sim & python3 -m fmpy simulate --output-file BuildSysPro_BuildSysPro.IBPSA.Fluid.Movers.BaseClasses.Validation.EulerComparison_res.csv --start-time 0 --stop-time 1 --timeout 50 --relative-tolerance 1e-06 --interface-type ModelExchange --solver CVode --output-interval 0.0004 BuildSysPro_BuildSysPro_IBPSA_Fluid_Movers_BaseClasses_Validation_EulerComparison.fmu > BuildSysPro_BuildSysPro.IBPSA.Fluid.Movers.BaseClasses.Validation.EulerComparison.pipe 2>&1)