Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr IBPSA_latest_IBPSA.Fluid.Movers.Validation.FlowControlled_m_flow.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/IBPSA 4.0.0-master/package.mo", uses=false) Using package IBPSA with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/IBPSA 4.0.0-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(IBPSA.Fluid.Movers.Validation.FlowControlled_m_flow,fileNamePrefix="IBPSA_latest_IBPSA_Fluid_Movers_Validation_FlowControlled_m_flow",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(IBPSA.Fluid.Movers.Validation.FlowControlled_m_flow,fileNamePrefix="IBPSA_latest_IBPSA_Fluid_Movers_Validation_FlowControlled_m_flow",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 0.000878/0.0008815, allocations: 92.95 kB / 16.02 MB, free: 84 kB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.00109/0.00109, allocations: 177.1 kB / 16.91 MB, free: 6.645 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.208/1.208, allocations: 223.3 MB / 241 MB, free: 5.328 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IBPSA 4.0.0-master/package.mo): time 0.6376/0.6376, allocations: 115.5 MB / 407.6 MB, free: 2.695 MB / 334.1 MB Notification: Performance of FrontEnd - loaded program: time 0.0003136/0.0003137, allocations: 8.781 kB / 496 MB, free: 6.258 MB / 350.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.13/0.1304, allocations: 77.53 MB / 0.56 GB, free: 8.93 MB / 430.1 MB Notification: Performance of NFInst.instantiate(IBPSA.Fluid.Movers.Validation.FlowControlled_m_flow): time 0.8602/0.9906, allocations: 318.5 MB / 0.8711 GB, free: 37.46 MB / 0.6387 GB Notification: Performance of NFInst.instExpressions: time 0.02548/1.016, allocations: 22.27 MB / 0.8929 GB, free: 37.12 MB / 0.6387 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.002965/1.019, allocations: 84.44 kB / 0.8929 GB, free: 37.12 MB / 0.6387 GB Notification: Performance of NFTyping.typeComponents: time 0.01096/1.03, allocations: 7.443 MB / 0.9002 GB, free: 36.96 MB / 0.6387 GB Notification: Performance of NFTyping.typeBindings: time 0.008577/1.039, allocations: 3.993 MB / 0.9041 GB, free: 36.76 MB / 0.6387 GB Notification: Performance of NFTyping.typeClassSections: time 0.004314/1.043, allocations: 2.203 MB / 0.9063 GB, free: 36.7 MB / 0.6387 GB [/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OpenModelica/OMCompiler/Compiler/NFFrontEnd/NFCeval.mo:1080:9-1080:67:writable] Error: Internal error NFCeval.evalBinaryMul failed to evaluate ‘{0.0, 1.666666666666667}[pressure.n] * 0.0‘ Notification: Performance of NFFlatten.flatten: time 0.01253/1.056, allocations: 14.37 MB / 0.9203 GB, free: 34.11 MB / 0.6387 GB Notification: Performance of NFFlatten.resolveConnections: time 0.002043/1.058, allocations: 1.849 MB / 0.9221 GB, free: 33.45 MB / 0.6387 GB Notification: Performance of NFEvalConstants.evaluate: time 0.004274/1.062, allocations: 2.76 MB / 0.9248 GB, free: 33 MB / 0.6387 GB Notification: Performance of NFSimplifyModel.simplify: time 0.00208/1.064, allocations: 1.851 MB / 0.9266 GB, free: 32.7 MB / 0.6387 GB Notification: Performance of NFPackage.collectConstants: time 0.000191/1.064, allocations: 95.03 kB / 0.9267 GB, free: 32.7 MB / 0.6387 GB Notification: Performance of NFFlatten.collectFunctions: time 0.005433/1.07, allocations: 4.247 MB / 0.9308 GB, free: 31.04 MB / 0.6387 GB Notification: Performance of NFScalarize.scalarize: time 0.0006184/1.07, allocations: 1.015 MB / 0.9318 GB, free: 30.34 MB / 0.6387 GB Notification: Performance of NFVerifyModel.verify: time 0.001012/1.071, allocations: 1.539 MB / 0.9333 GB, free: 29.43 MB / 0.6387 GB Notification: Performance of NFConvertDAE.convert: time 0.004016/1.075, allocations: 5.786 MB / 0.939 GB, free: 24.07 MB / 0.6387 GB Notification: Performance of FrontEnd - DAE generated: time 2.966e-06/1.075, allocations: 0 / 0.939 GB, free: 24.07 MB / 0.6387 GB Notification: Performance of FrontEnd: time 1.322e-06/1.075, allocations: 0 / 0.939 GB, free: 24.07 MB / 0.6387 GB Notification: Performance of Transformations before backend: time 2.224e-05/1.075, allocations: 0 / 0.939 GB, free: 24.07 MB / 0.6387 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 349 * Number of variables: 349 Notification: Performance of Generate backend data structure: time 0.003532/1.079, allocations: 3.225 MB / 0.9421 GB, free: 20.8 MB / 0.6387 GB Notification: Performance of prepare preOptimizeDAE: time 3.495e-05/1.079, allocations: 8.031 kB / 0.9421 GB, free: 20.8 MB / 0.6387 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0001751/1.079, allocations: 202.8 kB / 0.9423 GB, free: 20.59 MB / 0.6387 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.005655/1.085, allocations: 1.144 MB / 0.9435 GB, free: 19.45 MB / 0.6387 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.004076/1.089, allocations: 3.881 MB / 0.9472 GB, free: 15.6 MB / 0.6387 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0003538/1.089, allocations: 186.4 kB / 0.9474 GB, free: 15.42 MB / 0.6387 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001806/1.089, allocations: 148 kB / 0.9476 GB, free: 15.28 MB / 0.6387 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.002597/1.092, allocations: 1.744 MB / 0.9493 GB, free: 13.48 MB / 0.6387 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.804e-05/1.092, allocations: 2.625 kB / 0.9493 GB, free: 13.48 MB / 0.6387 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001145/1.092, allocations: 64 kB / 0.9493 GB, free: 13.41 MB / 0.6387 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 3.319e-05/1.092, allocations: 50.61 kB / 0.9494 GB, free: 13.36 MB / 0.6387 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.002999/1.095, allocations: 1.531 MB / 0.9509 GB, free: 11.84 MB / 0.6387 GB Warning: The model contains alias variables with redundant start and/or conflicting nominal values. It is recommended to resolve the conflicts, because otherwise the system could be hard to solve. To print the conflicting alias sets and the chosen candidates please use -d=aliasConflicts. Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.007411/1.103, allocations: 8.561 MB / 0.9592 GB, free: 2.816 MB / 0.6387 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001909/1.105, allocations: 1.11 MB / 0.9603 GB, free: 1.664 MB / 0.6387 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.001072/1.106, allocations: 0.5528 MB / 0.9609 GB, free: 1.113 MB / 0.6387 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0001361/1.106, allocations: 117 kB / 0.961 GB, free: 0.9844 MB / 0.6387 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 1.905e-05/1.106, allocations: 39.22 kB / 0.961 GB, free: 0.9375 MB / 0.6387 GB Notification: Performance of preOpt simplifyInStream (simulation): time 0.0005764/1.106, allocations: 222.6 kB / 0.9612 GB, free: 0.7188 MB / 0.6387 GB Notification: Performance of pre-optimization done (n=74): time 2.074e-06/1.106, allocations: 4 kB / 0.9612 GB, free: 0.7148 MB / 0.6387 GB Notification: Performance of matching and sorting (n=74): time 0.00354/1.11, allocations: 1.575 MB / 0.9628 GB, free: 15.13 MB / 0.6544 GB Notification: Performance of inlineWhenForInitialization (initialization): time 3.01e-05/1.11, allocations: 56.06 kB / 0.9628 GB, free: 15.07 MB / 0.6544 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.003174/1.113, allocations: 2.94 MB / 0.9657 GB, free: 12.12 MB / 0.6544 GB Notification: Performance of collectPreVariables (initialization): time 8.832e-05/1.113, allocations: 53.69 kB / 0.9657 GB, free: 12.06 MB / 0.6544 GB Notification: Performance of collectInitialEqns (initialization): time 0.0009255/1.114, allocations: 1.265 MB / 0.967 GB, free: 10.8 MB / 0.6544 GB Notification: Performance of collectInitialBindings (initialization): time 0.0002037/1.114, allocations: 275.8 kB / 0.9672 GB, free: 10.53 MB / 0.6544 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.000223/1.115, allocations: 213.6 kB / 0.9674 GB, free: 10.32 MB / 0.6544 GB Notification: Performance of setup shared object (initialization): time 8.75e-05/1.115, allocations: 301.1 kB / 0.9677 GB, free: 10.02 MB / 0.6544 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.001528/1.116, allocations: 0.8472 MB / 0.9686 GB, free: 9.168 MB / 0.6544 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.00189/1.118, allocations: 1.354 MB / 0.9699 GB, free: 7.617 MB / 0.6544 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.003089/1.121, allocations: 1.983 MB / 0.9718 GB, free: 5.535 MB / 0.6544 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 8.617e-06/1.121, allocations: 4 kB / 0.9718 GB, free: 5.531 MB / 0.6544 GB Notification: Performance of matching and sorting (n=258) (initialization): time 0.003956/1.125, allocations: 2.488 MB / 0.9742 GB, free: 3.102 MB / 0.6544 GB Notification: Performance of prepare postOptimizeDAE: time 0.0002458/1.126, allocations: 437.9 kB / 0.9747 GB, free: 2.52 MB / 0.6544 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.546e-05/1.126, allocations: 12 kB / 0.9747 GB, free: 2.508 MB / 0.6544 GB Notification: Performance of postOpt tearingSystem (initialization): time 2.316e-05/1.126, allocations: 16 kB / 0.9747 GB, free: 2.492 MB / 0.6544 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001478/1.127, allocations: 406.6 kB / 0.9751 GB, free: 2.117 MB / 0.6544 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0003276/1.127, allocations: 0.609 MB / 0.9757 GB, free: 1.492 MB / 0.6544 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001656/1.129, allocations: 215.3 kB / 0.9759 GB, free: 1.285 MB / 0.6544 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001145/1.129, allocations: 71.98 kB / 0.9759 GB, free: 1.215 MB / 0.6544 GB Notification: Performance of prepare postOptimizeDAE: time 9.728e-06/1.129, allocations: 4 kB / 0.976 GB, free: 1.211 MB / 0.6544 GB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.003387/1.133, allocations: 2.158 MB / 0.9781 GB, free: 15.12 MB / 0.67 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.223e-05/1.133, allocations: 12 kB / 0.9781 GB, free: 15.11 MB / 0.67 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.504e-05/1.133, allocations: 16 kB / 0.9781 GB, free: 15.1 MB / 0.67 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001243/1.134, allocations: 387.9 kB / 0.9785 GB, free: 14.74 MB / 0.67 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 2.026e-05/1.134, allocations: 27.17 kB / 0.9785 GB, free: 14.72 MB / 0.67 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001443/1.135, allocations: 203.8 kB / 0.9787 GB, free: 14.52 MB / 0.67 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 9.562e-05/1.136, allocations: 67.98 kB / 0.9787 GB, free: 14.45 MB / 0.67 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 51 * 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 (192): * Single equations (assignments): 187 * Array equations: 2 * Algorithm blocks: 0 * Record equations: 2 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 1 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details (not torn): * Constant Jacobian (size): 0 systems * Linear Jacobian (size,density): 0 systems * Non-linear Jacobian (size): 1 system {1} * Without analytic Jacobian (size): 0 systems Notification: Performance of prepare postOptimizeDAE: time 0.0009028/1.136, allocations: 0.8174 MB / 0.9795 GB, free: 13.65 MB / 0.67 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0002874/1.137, allocations: 268.4 kB / 0.9798 GB, free: 13.38 MB / 0.67 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.002741/1.139, allocations: 1.205 MB / 0.981 GB, free: 12.17 MB / 0.67 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 8.285e-06/1.139, allocations: 8 kB / 0.981 GB, free: 12.16 MB / 0.67 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 4.248e-06/1.139, allocations: 2.812 kB / 0.981 GB, free: 12.16 MB / 0.67 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.002194/1.142, allocations: 0.9959 MB / 0.982 GB, free: 11.13 MB / 0.67 GB Warning: The model contains alias variables with redundant start and/or conflicting nominal values. It is recommended to resolve the conflicts, because otherwise the system could be hard to solve. To print the conflicting alias sets and the chosen candidates please use -d=aliasConflicts. Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.005705/1.147, allocations: 3.557 MB / 0.9854 GB, free: 7.477 MB / 0.67 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 3.186e-06/1.147, allocations: 0 / 0.9854 GB, free: 7.477 MB / 0.67 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001042/1.148, allocations: 236.3 kB / 0.9857 GB, free: 7.254 MB / 0.67 GB Notification: Performance of postOpt tearingSystem (simulation): time 5.57e-06/1.148, allocations: 4 kB / 0.9857 GB, free: 7.25 MB / 0.67 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 5.473e-05/1.149, allocations: 23.98 kB / 0.9857 GB, free: 7.227 MB / 0.67 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.0002452/1.149, allocations: 0.5854 MB / 0.9863 GB, free: 6.621 MB / 0.67 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.045e-06/1.149, allocations: 3.938 kB / 0.9863 GB, free: 6.617 MB / 0.67 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.003627/1.152, allocations: 1.831 MB / 0.988 GB, free: 4.75 MB / 0.67 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0006083/1.153, allocations: 469.4 kB / 0.9885 GB, free: 4.27 MB / 0.67 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0002503/1.153, allocations: 12 kB / 0.9885 GB, free: 4.258 MB / 0.67 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.001355/1.155, allocations: 164.4 kB / 0.9887 GB, free: 4.098 MB / 0.67 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 9.933e-05/1.155, allocations: 55.06 kB / 0.9887 GB, free: 4.047 MB / 0.67 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 6.351e-05/1.155, allocations: 35.97 kB / 0.9887 GB, free: 4.012 MB / 0.67 GB Notification: Performance of sorting global known variables: time 0.00224/1.157, allocations: 1.968 MB / 0.9907 GB, free: 2.051 MB / 0.67 GB Notification: Performance of sort global known variables: time 1.5e-07/1.157, allocations: 0 / 0.9907 GB, free: 2.051 MB / 0.67 GB Notification: Performance of remove unused functions: time 0.002339/1.159, allocations: 1.263 MB / 0.9919 GB, free: 0.7852 MB / 0.67 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 7 * Number of states: 3 (floMacDyn.vol.dynBal.medium.Xi[1],floMacDyn.vol.dynBal.U,floMacDyn.vol.dynBal.m) * 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 (76): * Single equations (assignments): 75 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 1 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details (not torn): * Constant Jacobian (size): 0 systems * Linear Jacobian (size,density): 0 systems * Non-linear Jacobian (size): 1 system {1} * Without analytic Jacobian (size): 0 systems Notification: Performance of Backend phase and start with SimCode phase: time 0.004714/1.164, allocations: 2.792 MB / 0.9946 GB, free: 13.99 MB / 0.6856 GB Notification: Performance of simCode: created initialization part: time 0.004757/1.169, allocations: 2.81 MB / 0.9974 GB, free: 11.28 MB / 0.6856 GB Notification: Performance of simCode: created event and clocks part: time 2.866e-06/1.169, allocations: 0 / 0.9974 GB, free: 11.28 MB / 0.6856 GB Notification: Performance of simCode: created simulation system equations: time 0.001182/1.17, allocations: 0.5069 MB / 0.9979 GB, free: 10.79 MB / 0.6856 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.005361/1.176, allocations: 1.346 MB / 0.9992 GB, free: 9.465 MB / 0.6856 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.03742/1.213, allocations: 22.97 MB / 1.022 GB, free: 0.9648 MB / 0.7012 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001468/1.214, allocations: 1.928 MB / 1.023 GB, free: 15.01 MB / 0.7169 GB Notification: Performance of simCode: alias equations: time 0.002476/1.217, allocations: 0.7396 MB / 1.024 GB, free: 14.27 MB / 0.7169 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.001424/1.218, allocations: 1.175 MB / 1.025 GB, free: 13.09 MB / 0.7169 GB Notification: Performance of SimCode: time 3.2e-07/1.218, allocations: 0 / 1.025 GB, free: 13.09 MB / 0.7169 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 1.604/2.822, allocations: 71.83 MB / 1.096 GB, free: 6.148 MB / 0.7794 GB Notification: Performance of buildModelFMU: configured platform static using cached values: time 0.0002775/2.823, allocations: 275.4 kB / 1.096 GB, free: 5.781 MB / 0.7794 GB Notification: Performance of buildModelFMU: Generate platform static: time 3.907/6.729, allocations: 8.062 kB / 1.096 GB, free: 5.773 MB / 0.7794 GB (rm -f IBPSA_latest_IBPSA.Fluid.Movers.Validation.FlowControlled_m_flow.pipe ; mkfifo IBPSA_latest_IBPSA.Fluid.Movers.Validation.FlowControlled_m_flow.pipe ; head -c 1048576 < IBPSA_latest_IBPSA.Fluid.Movers.Validation.FlowControlled_m_flow.pipe >> ../files/IBPSA_latest_IBPSA.Fluid.Movers.Validation.FlowControlled_m_flow.sim & /home/hudson/saved_omc/OMSimulator/install/bin/OMSimulator --tempDir=temp_IBPSA_latest_IBPSA_Fluid_Movers_Validation_FlowControlled_m_flow_fmu --startTime=0 --stopTime=1 --timeout=50 --tolerance=1e-06 IBPSA_latest_IBPSA_Fluid_Movers_Validation_FlowControlled_m_flow.fmu > IBPSA_latest_IBPSA.Fluid.Movers.Validation.FlowControlled_m_flow.pipe 2>&1)