Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr IDEAS_IDEAS.Fluid.MixingVolumes.Examples.MixingVolumeMoistAir.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/IDEAS 3.0.0/package.mo", uses=false) Using package IDEAS with version 3.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0/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: translateModel(IDEAS.Fluid.MixingVolumes.Examples.MixingVolumeMoistAir,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="IDEAS_IDEAS.Fluid.MixingVolumes.Examples.MixingVolumeMoistAir") translateModel(IDEAS.Fluid.MixingVolumes.Examples.MixingVolumeMoistAir,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="IDEAS_IDEAS.Fluid.MixingVolumes.Examples.MixingVolumeMoistAir") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001268/0.001268, allocations: 103.6 kB / 16.35 MB, free: 6.289 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001258/0.001258, allocations: 193.4 kB / 17.3 MB, free: 5.859 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.363/1.363, allocations: 222.9 MB / 241 MB, free: 15.16 MB / 206.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0/package.mo): time 0.7811/0.7811, allocations: 132.2 MB / 423.3 MB, free: 6.609 MB / 334.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001237/0.001237, allocations: 64.14 kB / 0.5032 GB, free: 10.96 MB / 430.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.3541/0.3553, allocations: 80.18 MB / 0.5815 GB, free: 27.59 MB / 446.1 MB Notification: Performance of NFInst.instantiate(IDEAS.Fluid.MixingVolumes.Examples.MixingVolumeMoistAir): time 0.5426/0.8979, allocations: 198.8 MB / 0.7757 GB, free: 1.621 MB / 0.5762 GB Notification: Performance of NFInst.instExpressions: time 0.01474/0.9127, allocations: 10.36 MB / 0.7858 GB, free: 1.473 MB / 0.5762 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.002118/0.9149, allocations: 56.41 kB / 0.7858 GB, free: 1.473 MB / 0.5762 GB Notification: Performance of NFTyping.typeComponents: time 0.001761/0.9167, allocations: 0.5694 MB / 0.7864 GB, free: 1.465 MB / 0.5762 GB Notification: Performance of NFTyping.typeBindings: time 0.005321/0.922, allocations: 1.976 MB / 0.7883 GB, free: 1.387 MB / 0.5762 GB Notification: Performance of NFTyping.typeClassSections: time 0.003843/0.9259, allocations: 1.377 MB / 0.7897 GB, free: 1.355 MB / 0.5762 GB Notification: Performance of NFFlatten.flatten: time 0.004026/0.9299, allocations: 2.815 MB / 0.7924 GB, free: 1.344 MB / 0.5762 GB Notification: Performance of NFFlatten.resolveConnections: time 0.001532/0.9315, allocations: 1.166 MB / 0.7935 GB, free: 1.207 MB / 0.5762 GB Notification: Performance of NFEvalConstants.evaluate: time 0.004241/0.9357, allocations: 1.678 MB / 0.7952 GB, free: 1.176 MB / 0.5762 GB Notification: Performance of NFSimplifyModel.simplify: time 0.001858/0.9376, allocations: 0.9587 MB / 0.7961 GB, free: 1.172 MB / 0.5762 GB Notification: Performance of NFPackage.collectConstants: time 0.0001787/0.9378, allocations: 123.6 kB / 0.7962 GB, free: 1.172 MB / 0.5762 GB Notification: Performance of NFFlatten.collectFunctions: time 0.004431/0.9422, allocations: 2.147 MB / 0.7983 GB, free: 1.148 MB / 0.5762 GB Notification: Performance of NFScalarize.scalarize: time 0.0004076/0.9427, allocations: 425.5 kB / 0.7987 GB, free: 1.145 MB / 0.5762 GB Notification: Performance of NFVerifyModel.verify: time 0.0008005/0.9435, allocations: 0.7083 MB / 0.7994 GB, free: 0.9297 MB / 0.5762 GB Notification: Performance of NFConvertDAE.convert: time 0.003628/0.9471, allocations: 2.517 MB / 0.8019 GB, free: 0.5859 MB / 0.5762 GB Notification: Performance of FrontEnd - DAE generated: time 5.66e-06/0.9471, allocations: 3.625 kB / 0.8019 GB, free: 0.5859 MB / 0.5762 GB Notification: Performance of FrontEnd: time 1.823e-06/0.9471, allocations: 0 / 0.8019 GB, free: 0.5859 MB / 0.5762 GB Notification: Performance of Transformations before backend: time 1.779e-05/0.9472, allocations: 4.344 kB / 0.8019 GB, free: 0.5859 MB / 0.5762 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 253 * Number of variables: 253 Notification: Performance of Generate backend data structure: time 0.00272/0.9499, allocations: 1.809 MB / 0.8037 GB, free: 15.63 MB / 0.5919 GB Notification: Performance of prepare preOptimizeDAE: time 3.877e-05/0.9499, allocations: 9.406 kB / 0.8037 GB, free: 15.63 MB / 0.5919 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.002016/0.9519, allocations: 366.7 kB / 0.804 GB, free: 15.55 MB / 0.5919 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001612/0.9536, allocations: 0.9804 MB / 0.805 GB, free: 15.18 MB / 0.5919 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 5.698e-05/0.9536, allocations: 80.06 kB / 0.8051 GB, free: 15.18 MB / 0.5919 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001395/0.9538, allocations: 101.3 kB / 0.8052 GB, free: 15.18 MB / 0.5919 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001554/0.9553, allocations: 1.104 MB / 0.8062 GB, free: 14.99 MB / 0.5919 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.583e-05/0.9554, allocations: 3.094 kB / 0.8062 GB, free: 14.99 MB / 0.5919 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 9.141e-05/0.9555, allocations: 42.94 kB / 0.8063 GB, free: 14.99 MB / 0.5919 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 3.585e-05/0.9555, allocations: 37.72 kB / 0.8063 GB, free: 14.99 MB / 0.5919 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001318/0.9568, allocations: 0.8091 MB / 0.8071 GB, free: 14.97 MB / 0.5919 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 0.005999/0.9629, allocations: 5.066 MB / 0.812 GB, free: 12.08 MB / 0.5919 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001159/0.964, allocations: 0.6996 MB / 0.8127 GB, free: 12.05 MB / 0.5919 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0005074/0.9646, allocations: 354.4 kB / 0.8131 GB, free: 12.05 MB / 0.5919 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0005829/0.9651, allocations: 317.6 kB / 0.8134 GB, free: 11.76 MB / 0.5919 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.118e-05/0.9652, allocations: 38.06 kB / 0.8134 GB, free: 11.72 MB / 0.5919 GB Notification: Performance of pre-optimization done (n=70): time 2.003e-06/0.9652, allocations: 0 / 0.8134 GB, free: 11.72 MB / 0.5919 GB Notification: Performance of matching and sorting (n=70): time 0.001773/0.967, allocations: 0.9443 MB / 0.8143 GB, free: 11.62 MB / 0.5919 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.818e-05/0.967, allocations: 57.47 kB / 0.8144 GB, free: 11.55 MB / 0.5919 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0009423/0.968, allocations: 0.8851 MB / 0.8152 GB, free: 11.4 MB / 0.5919 GB Notification: Performance of collectPreVariables (initialization): time 0.0001239/0.9681, allocations: 41.7 kB / 0.8153 GB, free: 11.36 MB / 0.5919 GB Notification: Performance of collectInitialEqns (initialization): time 0.0004226/0.9686, allocations: 0.5523 MB / 0.8158 GB, free: 11.15 MB / 0.5919 GB Notification: Performance of collectInitialBindings (initialization): time 0.0002026/0.9688, allocations: 249.9 kB / 0.8161 GB, free: 10.99 MB / 0.5919 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001962/0.969, allocations: 144.4 kB / 0.8162 GB, free: 10.97 MB / 0.5919 GB Notification: Performance of setup shared object (initialization): time 0.000119/0.9691, allocations: 332.3 kB / 0.8165 GB, free: 10.66 MB / 0.5919 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0004386/0.9695, allocations: 262.3 kB / 0.8168 GB, free: 10.65 MB / 0.5919 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0005449/0.9701, allocations: 449.3 kB / 0.8172 GB, free: 10.45 MB / 0.5919 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001015/0.9711, allocations: 0.7089 MB / 0.8179 GB, free: 10.28 MB / 0.5919 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 5.029e-06/0.9711, allocations: 3.375 kB / 0.8179 GB, free: 10.28 MB / 0.5919 GB Notification: Performance of matching and sorting (n=94) (initialization): time 0.001376/0.9725, allocations: 0.8355 MB / 0.8187 GB, free: 10.17 MB / 0.5919 GB Notification: Performance of prepare postOptimizeDAE: time 1.908e-05/0.9725, allocations: 7.906 kB / 0.8187 GB, free: 10.17 MB / 0.5919 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 9.307e-06/0.9726, allocations: 5.781 kB / 0.8187 GB, free: 10.17 MB / 0.5919 GB Notification: Performance of postOpt tearingSystem (initialization): time 2.117e-05/0.9726, allocations: 7.812 kB / 0.8187 GB, free: 10.17 MB / 0.5919 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001526/0.9741, allocations: 261.4 kB / 0.819 GB, free: 10.17 MB / 0.5919 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.001437/0.9756, allocations: 1.502 MB / 0.8204 GB, free: 8.719 MB / 0.5919 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0007765/0.9764, allocations: 83.11 kB / 0.8205 GB, free: 8.68 MB / 0.5919 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 6.255e-05/0.9764, allocations: 29.67 kB / 0.8206 GB, free: 8.68 MB / 0.5919 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0007823/0.9772, allocations: 475.5 kB / 0.821 GB, free: 8.598 MB / 0.5919 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.000614/0.9778, allocations: 451.9 kB / 0.8214 GB, free: 8.395 MB / 0.5919 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.0009784/0.9788, allocations: 0.7063 MB / 0.8221 GB, free: 8.203 MB / 0.5919 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 3.857e-06/0.9788, allocations: 3.375 kB / 0.8221 GB, free: 8.203 MB / 0.5919 GB Notification: Performance of matching and sorting (n=94) (initialization_lambda0): time 0.001361/0.9802, allocations: 0.8291 MB / 0.8229 GB, free: 7.973 MB / 0.5919 GB Notification: Performance of prepare postOptimizeDAE: time 1.886e-05/0.9802, allocations: 10.28 kB / 0.823 GB, free: 7.973 MB / 0.5919 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.095e-05/0.9803, allocations: 8.844 kB / 0.823 GB, free: 7.969 MB / 0.5919 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.258e-05/0.9803, allocations: 10.88 kB / 0.823 GB, free: 7.969 MB / 0.5919 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001489/0.9818, allocations: 258.3 kB / 0.8232 GB, free: 7.957 MB / 0.5919 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.001472/0.9833, allocations: 1.495 MB / 0.8247 GB, free: 6.457 MB / 0.5919 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0008172/0.9841, allocations: 68.45 kB / 0.8247 GB, free: 6.418 MB / 0.5919 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 7.253e-05/0.9842, allocations: 37.12 kB / 0.8248 GB, free: 6.406 MB / 0.5919 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 21 * Number of states: 0 () * Number of discrete variables: 4 (PI1.I.trigger_internal,PI.I.trigger_internal,QLat.local_reset,QSen.local_reset) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (94): * Single equations (assignments): 93 * 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 prepare postOptimizeDAE: time 0.0003064/0.9845, allocations: 236.6 kB / 0.825 GB, free: 6.191 MB / 0.5919 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0002122/0.9847, allocations: 108.3 kB / 0.8251 GB, free: 6.137 MB / 0.5919 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.001781/0.9865, allocations: 0.7918 MB / 0.8259 GB, free: 5.797 MB / 0.5919 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 9.307e-06/0.9865, allocations: 10.39 kB / 0.8259 GB, free: 5.793 MB / 0.5919 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 2.565e-06/0.9865, allocations: 0 / 0.8259 GB, free: 5.793 MB / 0.5919 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.001254/0.9878, allocations: 0.7061 MB / 0.8266 GB, free: 5.426 MB / 0.5919 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.003264/0.9911, allocations: 1.935 MB / 0.8285 GB, free: 4.379 MB / 0.5919 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 5.17e-06/0.9911, allocations: 3.062 kB / 0.8285 GB, free: 4.379 MB / 0.5919 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0006984/0.9918, allocations: 141.1 kB / 0.8286 GB, free: 4.359 MB / 0.5919 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0003214/0.9921, allocations: 42.7 kB / 0.8286 GB, free: 4.336 MB / 0.5919 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 5.564e-05/0.9922, allocations: 18.77 kB / 0.8287 GB, free: 4.324 MB / 0.5919 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.00128/0.9935, allocations: 1.445 MB / 0.8301 GB, free: 2.844 MB / 0.5919 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.056e-06/0.9935, allocations: 5.938 kB / 0.8301 GB, free: 2.84 MB / 0.5919 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.002239/0.9957, allocations: 1.258 MB / 0.8313 GB, free: 2.09 MB / 0.5919 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0005366/0.9963, allocations: 254.8 kB / 0.8316 GB, free: 1.871 MB / 0.5919 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001194/0.9964, allocations: 17.03 kB / 0.8316 GB, free: 1.859 MB / 0.5919 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0005665/0.997, allocations: 22.83 kB / 0.8316 GB, free: 1.848 MB / 0.5919 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001009/0.9971, allocations: 48.94 kB / 0.8316 GB, free: 1.82 MB / 0.5919 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 5.932e-05/0.9971, allocations: 24.48 kB / 0.8317 GB, free: 1.812 MB / 0.5919 GB Notification: Performance of sorting global known variables: time 0.0009631/0.9981, allocations: 0.6044 MB / 0.8323 GB, free: 1.461 MB / 0.5919 GB Notification: Performance of sort global known variables: time 2.3e-07/0.9981, allocations: 0 / 0.8323 GB, free: 1.461 MB / 0.5919 GB Notification: Performance of remove unused functions: time 0.001619/0.9998, allocations: 0.5292 MB / 0.8328 GB, free: 1.34 MB / 0.5919 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 8 * Number of states: 7 (vol1.dynBal.U,vol1.dynBal.m,vol1.dynBal.mXi[1],QSen.y,QLat.y,PI.I.y,PI1.I.y) * 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 (70): * Single equations (assignments): 69 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 0 systems * Non-linear torn systems (#iteration vars, #inner vars): 1 system {(1,1)} Notification: Performance of Backend phase and start with SimCode phase: time 0.0005244/1, allocations: 226.8 kB / 0.833 GB, free: 1.203 MB / 0.5919 GB Notification: Performance of simCode: created initialization part: time 0.003643/1.004, allocations: 1.213 MB / 0.8342 GB, free: 0.7344 MB / 0.5919 GB Notification: Performance of simCode: created event and clocks part: time 4.077e-06/1.004, allocations: 192 / 0.8342 GB, free: 0.7344 MB / 0.5919 GB Notification: Performance of simCode: created simulation system equations: time 0.0007556/1.005, allocations: 446.4 kB / 0.8346 GB, free: 0.4922 MB / 0.5919 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.002055/1.007, allocations: 0.5241 MB / 0.8351 GB, free: 228 kB / 0.5919 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.003541/1.01, allocations: 2.161 MB / 0.8372 GB, free: 14.05 MB / 0.6075 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0007355/1.011, allocations: 1.144 MB / 0.8383 GB, free: 12.88 MB / 0.6075 GB Notification: Performance of simCode: alias equations: time 0.0008983/1.012, allocations: 280.8 kB / 0.8386 GB, free: 12.6 MB / 0.6075 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.000217/1.012, allocations: 75.44 kB / 0.8387 GB, free: 12.53 MB / 0.6075 GB Notification: Performance of SimCode: time 6.31e-07/1.012, allocations: 0 / 0.8387 GB, free: 12.53 MB / 0.6075 GB Notification: Performance of Templates: time 0.03173/1.044, allocations: 17.66 MB / 0.8559 GB, free: 11.17 MB / 0.6231 GB make -j1 -f IDEAS_IDEAS.Fluid.MixingVolumes.Examples.MixingVolumeMoistAir.makefile (rm -f IDEAS_IDEAS.Fluid.MixingVolumes.Examples.MixingVolumeMoistAir.pipe ; mkfifo IDEAS_IDEAS.Fluid.MixingVolumes.Examples.MixingVolumeMoistAir.pipe ; head -c 1048576 < IDEAS_IDEAS.Fluid.MixingVolumes.Examples.MixingVolumeMoistAir.pipe >> ../files/IDEAS_IDEAS.Fluid.MixingVolumes.Examples.MixingVolumeMoistAir.sim & ./IDEAS_IDEAS.Fluid.MixingVolumes.Examples.MixingVolumeMoistAir -abortSlowSimulation -alarm=480 -s gbode -lv LOG_STATS > IDEAS_IDEAS.Fluid.MixingVolumes.Examples.MixingVolumeMoistAir.pipe 2>&1)