Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr BuildingSystems_BuildingSystems.Airflow.Multizone.Examples.ChimneyShaftWithVolume.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/NcDataReader2 2.5.1-master/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/package.mo", uses=false) Using package BuildingSystems with version 2.0.0-beta (/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/package.mo) Using package NcDataReader2 with version 2.5.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/NcDataReader2 2.5.1-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: translateModel(BuildingSystems.Airflow.Multizone.Examples.ChimneyShaftWithVolume,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="BuildingSystems_BuildingSystems.Airflow.Multizone.Examples.ChimneyShaftWithVolume") translateModel(BuildingSystems.Airflow.Multizone.Examples.ChimneyShaftWithVolume,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="BuildingSystems_BuildingSystems.Airflow.Multizone.Examples.ChimneyShaftWithVolume") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001324/0.001324, allocations: 113.1 kB / 16.39 MB, free: 6.484 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001121/0.001121, allocations: 190.2 kB / 17.31 MB, free: 5.785 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.307/1.307, allocations: 222.9 MB / 241 MB, free: 15.16 MB / 206.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/NcDataReader2 2.5.1-master/package.mo): time 0.002187/0.002187, allocations: 270.4 kB / 291.4 MB, free: 14.47 MB / 238.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/package.mo): time 0.9483/0.9483, allocations: 169.2 MB / 0.4989 GB, free: 4.449 MB / 382.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001808/0.001809, allocations: 87.86 kB / 0.6821 GB, free: 7.004 MB / 494.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.4635/0.4653, allocations: 86.97 MB / 0.767 GB, free: 3.93 MB / 0.5294 GB Notification: Performance of NFInst.instantiate(BuildingSystems.Airflow.Multizone.Examples.ChimneyShaftWithVolume): time 0.7157/1.181, allocations: 235.9 MB / 0.9973 GB, free: 1.633 MB / 0.7169 GB Notification: Performance of NFInst.instExpressions: time 0.0145/1.196, allocations: 10.42 MB / 1.007 GB, free: 1.508 MB / 0.7169 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.003141/1.199, allocations: 60.59 kB / 1.008 GB, free: 1.508 MB / 0.7169 GB Notification: Performance of NFTyping.typeComponents: time 0.003089/1.202, allocations: 1.189 MB / 1.009 GB, free: 1.48 MB / 0.7169 GB Notification: Performance of NFTyping.typeBindings: time 0.008802/1.211, allocations: 3.659 MB / 1.012 GB, free: 1.328 MB / 0.7169 GB Notification: Performance of NFTyping.typeClassSections: time 0.005472/1.216, allocations: 2.069 MB / 1.014 GB, free: 1.277 MB / 0.7169 GB Notification: Performance of NFFlatten.flatten: time 0.006911/1.223, allocations: 4.449 MB / 1.019 GB, free: 1.266 MB / 0.7169 GB Notification: Performance of NFFlatten.resolveConnections: time 0.003199/1.226, allocations: 1.583 MB / 1.02 GB, free: 1.094 MB / 0.7169 GB Notification: Performance of NFEvalConstants.evaluate: time 0.003448/1.23, allocations: 1.592 MB / 1.022 GB, free: 1.094 MB / 0.7169 GB Notification: Performance of NFSimplifyModel.simplify: time 0.003318/1.233, allocations: 1.499 MB / 1.023 GB, free: 0.9258 MB / 0.7169 GB Notification: Performance of NFPackage.collectConstants: time 0.0006876/1.234, allocations: 188.5 kB / 1.023 GB, free: 0.9219 MB / 0.7169 GB Notification: Performance of NFFlatten.collectFunctions: time 0.00731/1.241, allocations: 3.243 MB / 1.027 GB, free: 0.8867 MB / 0.7169 GB Notification: Performance of NFScalarize.scalarize: time 0.001399/1.243, allocations: 0.6903 MB / 1.027 GB, free: 0.8125 MB / 0.7169 GB Notification: Performance of NFVerifyModel.verify: time 0.002658/1.245, allocations: 1.065 MB / 1.028 GB, free: 0.5234 MB / 0.7169 GB Notification: Performance of NFConvertDAE.convert: time 0.009059/1.254, allocations: 3.82 MB / 1.032 GB, free: 72 kB / 0.7169 GB Notification: Performance of FrontEnd - DAE generated: time 7.484e-06/1.255, allocations: 0 / 1.032 GB, free: 72 kB / 0.7169 GB Notification: Performance of FrontEnd: time 1.833e-06/1.255, allocations: 0.9062 kB / 1.032 GB, free: 72 kB / 0.7169 GB Notification: Performance of Transformations before backend: time 0.0001274/1.255, allocations: 0 / 1.032 GB, free: 72 kB / 0.7169 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 344 * Number of variables: 344 Notification: Performance of Generate backend data structure: time 0.007846/1.263, allocations: 2.489 MB / 1.034 GB, free: 14.91 MB / 0.7325 GB Notification: Performance of prepare preOptimizeDAE: time 5.605e-05/1.263, allocations: 8.812 kB / 1.034 GB, free: 14.91 MB / 0.7325 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.003941/1.267, allocations: 0.5255 MB / 1.035 GB, free: 14.8 MB / 0.7325 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.00261/1.269, allocations: 1.282 MB / 1.036 GB, free: 14.39 MB / 0.7325 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 7.809e-05/1.269, allocations: 105.3 kB / 1.036 GB, free: 14.38 MB / 0.7325 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0002316/1.27, allocations: 144.1 kB / 1.036 GB, free: 14.38 MB / 0.7325 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.002882/1.272, allocations: 1.667 MB / 1.038 GB, free: 14.17 MB / 0.7325 GB Notification: Performance of preOpt findStateOrder (simulation): time 3.773e-05/1.272, allocations: 1.406 kB / 1.038 GB, free: 14.17 MB / 0.7325 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001432/1.273, allocations: 58.25 kB / 1.038 GB, free: 14.17 MB / 0.7325 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 9.665e-05/1.273, allocations: 67.67 kB / 1.038 GB, free: 14.17 MB / 0.7325 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.002568/1.275, allocations: 1.456 MB / 1.04 GB, free: 14.15 MB / 0.7325 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 0.00966/1.285, allocations: 6.983 MB / 1.046 GB, free: 9.539 MB / 0.7325 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001892/1.287, allocations: 1.188 MB / 1.048 GB, free: 8.816 MB / 0.7325 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0009057/1.288, allocations: 0.6121 MB / 1.048 GB, free: 8.512 MB / 0.7325 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0008335/1.289, allocations: 0.8608 MB / 1.049 GB, free: 7.543 MB / 0.7325 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.00105/1.29, allocations: 0.6144 MB / 1.05 GB, free: 7.172 MB / 0.7325 GB Notification: Performance of pre-optimization done (n=110): time 4.117e-06/1.29, allocations: 0 / 1.05 GB, free: 7.172 MB / 0.7325 GB Notification: Performance of matching and sorting (n=110): time 0.003206/1.293, allocations: 1.572 MB / 1.051 GB, free: 6.398 MB / 0.7325 GB Notification: Performance of inlineWhenForInitialization (initialization): time 6.989e-05/1.293, allocations: 95.77 kB / 1.051 GB, free: 6.297 MB / 0.7325 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001691/1.295, allocations: 1.198 MB / 1.052 GB, free: 5.648 MB / 0.7325 GB Notification: Performance of collectPreVariables (initialization): time 0.0001438/1.295, allocations: 49.05 kB / 1.052 GB, free: 5.602 MB / 0.7325 GB Notification: Performance of collectInitialEqns (initialization): time 0.0005925/1.296, allocations: 0.6688 MB / 1.053 GB, free: 5.016 MB / 0.7325 GB Notification: Performance of collectInitialBindings (initialization): time 0.0003997/1.296, allocations: 389.9 kB / 1.053 GB, free: 4.688 MB / 0.7325 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0002831/1.296, allocations: 175.4 kB / 1.054 GB, free: 4.586 MB / 0.7325 GB Notification: Performance of setup shared object (initialization): time 0.0001228/1.296, allocations: 344.4 kB / 1.054 GB, free: 4.254 MB / 0.7325 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0007244/1.297, allocations: 434 kB / 1.054 GB, free: 4.031 MB / 0.7325 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0008511/1.298, allocations: 0.5566 MB / 1.055 GB, free: 3.684 MB / 0.7325 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.00154/1.299, allocations: 1.018 MB / 1.056 GB, free: 3.102 MB / 0.7325 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 5.23e-06/1.3, allocations: 0 / 1.056 GB, free: 3.102 MB / 0.7325 GB Notification: Performance of matching and sorting (n=126) (initialization): time 0.002205/1.302, allocations: 1.219 MB / 1.057 GB, free: 2.5 MB / 0.7325 GB Notification: Performance of prepare postOptimizeDAE: time 2.036e-05/1.302, allocations: 12.38 kB / 1.057 GB, free: 2.496 MB / 0.7325 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.072e-05/1.302, allocations: 1.812 kB / 1.057 GB, free: 2.496 MB / 0.7325 GB Notification: Performance of postOpt tearingSystem (initialization): time 2.667e-05/1.302, allocations: 7.656 kB / 1.057 GB, free: 2.492 MB / 0.7325 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0009795/1.303, allocations: 212.5 kB / 1.057 GB, free: 2.297 MB / 0.7325 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.777e-05/1.303, allocations: 11.94 kB / 1.057 GB, free: 2.285 MB / 0.7325 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001268/1.304, allocations: 99.31 kB / 1.057 GB, free: 2.188 MB / 0.7325 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 8.205e-05/1.304, allocations: 36 kB / 1.057 GB, free: 2.152 MB / 0.7325 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.00128/1.305, allocations: 0.7385 MB / 1.058 GB, free: 1.41 MB / 0.7325 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0007757/1.306, allocations: 0.5431 MB / 1.059 GB, free: 0.8359 MB / 0.7325 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.001479/1.308, allocations: 0.9947 MB / 1.06 GB, free: 15.82 MB / 0.7481 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 3.376e-06/1.308, allocations: 0 / 1.06 GB, free: 15.82 MB / 0.7481 GB Notification: Performance of matching and sorting (n=126) (initialization_lambda0): time 0.002142/1.31, allocations: 1.199 MB / 1.061 GB, free: 14.62 MB / 0.7481 GB Notification: Performance of prepare postOptimizeDAE: time 1.478e-05/1.31, allocations: 8.062 kB / 1.061 GB, free: 14.62 MB / 0.7481 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 7.885e-06/1.31, allocations: 4 kB / 1.061 GB, free: 14.61 MB / 0.7481 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.037e-05/1.31, allocations: 8 kB / 1.061 GB, free: 14.61 MB / 0.7481 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.000929/1.311, allocations: 208.4 kB / 1.061 GB, free: 14.41 MB / 0.7481 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.471e-05/1.311, allocations: 8 kB / 1.061 GB, free: 14.41 MB / 0.7481 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001281/1.312, allocations: 79.2 kB / 1.061 GB, free: 14.33 MB / 0.7481 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 7.573e-05/1.312, allocations: 39.92 kB / 1.061 GB, free: 14.29 MB / 0.7481 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 11 * Number of states: 0 () * Number of discrete variables: 5 ($PRE.mRoo_flow.nextTimeEvent,$whenCondition1,mRoo_flow.nextTimeEventScaled,$PRE.mRoo_flow.nextTimeEventScaled,mRoo_flow.nextTimeEvent) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (126): * Single equations (assignments): 126 * 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 prepare postOptimizeDAE: time 0.0003248/1.313, allocations: 240.8 kB / 1.061 GB, free: 14.06 MB / 0.7481 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0002787/1.313, allocations: 150.3 kB / 1.062 GB, free: 13.91 MB / 0.7481 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.002296/1.315, allocations: 1.242 MB / 1.063 GB, free: 12.66 MB / 0.7481 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.007e-05/1.315, allocations: 8 kB / 1.063 GB, free: 12.66 MB / 0.7481 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 9.407e-06/1.315, allocations: 7.938 kB / 1.063 GB, free: 12.65 MB / 0.7481 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.00158/1.317, allocations: 1.01 MB / 1.064 GB, free: 11.63 MB / 0.7481 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.005162/1.322, allocations: 3.158 MB / 1.067 GB, free: 8.391 MB / 0.7481 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 5.951e-06/1.322, allocations: 0 / 1.067 GB, free: 8.391 MB / 0.7481 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001122/1.323, allocations: 232.4 kB / 1.067 GB, free: 8.176 MB / 0.7481 GB Notification: Performance of postOpt tearingSystem (simulation): time 1.67e-05/1.323, allocations: 8 kB / 1.067 GB, free: 8.168 MB / 0.7481 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 7.488e-05/1.323, allocations: 24 kB / 1.067 GB, free: 8.145 MB / 0.7481 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 1.069e-05/1.323, allocations: 11.98 kB / 1.067 GB, free: 8.133 MB / 0.7481 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 4.889e-06/1.323, allocations: 7.375 kB / 1.067 GB, free: 8.129 MB / 0.7481 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.002988/1.326, allocations: 1.912 MB / 1.069 GB, free: 6.168 MB / 0.7481 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0007655/1.327, allocations: 358.9 kB / 1.069 GB, free: 5.797 MB / 0.7481 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001841/1.327, allocations: 28 kB / 1.069 GB, free: 5.77 MB / 0.7481 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0008993/1.328, allocations: 34.83 kB / 1.069 GB, free: 5.738 MB / 0.7481 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001652/1.328, allocations: 87.92 kB / 1.07 GB, free: 5.656 MB / 0.7481 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 7.704e-05/1.328, allocations: 35.98 kB / 1.07 GB, free: 5.621 MB / 0.7481 GB Notification: Performance of sorting global known variables: time 0.001104/1.33, allocations: 0.8258 MB / 1.07 GB, free: 4.793 MB / 0.7481 GB Notification: Performance of sort global known variables: time 1.7e-07/1.33, allocations: 0 / 1.07 GB, free: 4.793 MB / 0.7481 GB Notification: Performance of remove unused functions: time 0.001984/1.332, allocations: 0.8378 MB / 1.071 GB, free: 3.953 MB / 0.7481 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 11 * Number of states: 9 (roo.dynBal.medium.Xi[1],roo.dynBal.U,roo.dynBal.m,oriChiTop.mExc,oriBot.mExc,oriChiBot.mExc,sha.vol.dynBal.medium.Xi[1],sha.vol.dynBal.U,sha.vol.dynBal.m) * Number of discrete variables: 3 ($whenCondition1,mRoo_flow.nextTimeEvent,mRoo_flow.nextTimeEventScaled) * Number of discrete states: 2 (mRoo_flow.nextTimeEvent,mRoo_flow.nextTimeEventScaled) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (110): * Single equations (assignments): 108 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 2 * 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 0.001296/1.333, allocations: 0.5939 MB / 1.072 GB, free: 3.551 MB / 0.7481 GB Notification: Performance of simCode: created initialization part: time 0.002805/1.336, allocations: 1.622 MB / 1.073 GB, free: 1.969 MB / 0.7481 GB Notification: Performance of simCode: created event and clocks part: time 5.009e-06/1.336, allocations: 0 / 1.073 GB, free: 1.969 MB / 0.7481 GB Notification: Performance of simCode: created simulation system equations: time 0.0008949/1.337, allocations: 0.5648 MB / 1.074 GB, free: 1.43 MB / 0.7481 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.004055/1.341, allocations: 0.8609 MB / 1.075 GB, free: 0.5898 MB / 0.7481 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.005295/1.346, allocations: 3.394 MB / 1.078 GB, free: 13.15 MB / 0.7637 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0008994/1.347, allocations: 1.368 MB / 1.079 GB, free: 11.75 MB / 0.7637 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0005553/1.347, allocations: 119.4 kB / 1.08 GB, free: 11.63 MB / 0.7637 GB Notification: Performance of SimCode: time 7.71e-07/1.347, allocations: 0 / 1.08 GB, free: 11.63 MB / 0.7637 GB Notification: Performance of Templates: time 0.03722/1.385, allocations: 25.3 MB / 1.104 GB, free: 2.566 MB / 0.7794 GB make -j1 -f BuildingSystems_BuildingSystems.Airflow.Multizone.Examples.ChimneyShaftWithVolume.makefile (rm -f BuildingSystems_BuildingSystems.Airflow.Multizone.Examples.ChimneyShaftWithVolume.pipe ; mkfifo BuildingSystems_BuildingSystems.Airflow.Multizone.Examples.ChimneyShaftWithVolume.pipe ; head -c 1048576 < BuildingSystems_BuildingSystems.Airflow.Multizone.Examples.ChimneyShaftWithVolume.pipe >> ../files/BuildingSystems_BuildingSystems.Airflow.Multizone.Examples.ChimneyShaftWithVolume.sim & ./BuildingSystems_BuildingSystems.Airflow.Multizone.Examples.ChimneyShaftWithVolume -abortSlowSimulation -alarm=480 -lv LOG_STATS > BuildingSystems_BuildingSystems.Airflow.Multizone.Examples.ChimneyShaftWithVolume.pipe 2>&1)