Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr IDEAS_dev_IDEAS.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8.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-master/package.mo", uses=false) Using package IDEAS with version 3.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-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: translateModel(IDEAS.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8,tolerance=1e-06,outputFormat="empty",numberOfIntervals=172800,variableFilter="",fileNamePrefix="IDEAS_dev_IDEAS.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8") translateModel(IDEAS.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8,tolerance=1e-06,outputFormat="empty",numberOfIntervals=172800,variableFilter="",fileNamePrefix="IDEAS_dev_IDEAS.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001505/0.001505, allocations: 103.3 kB / 16.35 MB, free: 5.875 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001681/0.001681, allocations: 195.9 kB / 17.3 MB, free: 5.516 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.335/1.335, allocations: 222.9 MB / 241 MB, free: 14.99 MB / 206.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/package.mo): time 0.7888/0.7888, allocations: 135.1 MB / 426.3 MB, free: 4.129 MB / 334.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001203/0.001203, allocations: 67.91 kB / 0.5067 GB, free: 7.672 MB / 430.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.2918/0.293, allocations: 80.91 MB / 0.5858 GB, free: 25.58 MB / 446.1 MB Notification: Performance of NFInst.instantiate(IDEAS.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8): time 0.1483/0.4414, allocations: 157.8 MB / 0.7399 GB, free: 12.2 MB / 0.5762 GB Notification: Performance of NFInst.instExpressions: time 0.3101/0.7515, allocations: 22.17 MB / 0.7615 GB, free: 1.508 MB / 0.5762 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.001684/0.7532, allocations: 59.16 kB / 0.7616 GB, free: 1.508 MB / 0.5762 GB Notification: Performance of NFTyping.typeComponents: time 0.002949/0.7563, allocations: 2.743 MB / 0.7643 GB, free: 1.457 MB / 0.5762 GB Notification: Performance of NFTyping.typeBindings: time 0.002528/0.7588, allocations: 1.771 MB / 0.766 GB, free: 1.414 MB / 0.5762 GB Notification: Performance of NFTyping.typeClassSections: time 0.001624/0.7604, allocations: 0.6991 MB / 0.7667 GB, free: 1.402 MB / 0.5762 GB Notification: Performance of NFFlatten.flatten: time 0.002509/0.763, allocations: 2.274 MB / 0.7689 GB, free: 1.402 MB / 0.5762 GB Notification: Performance of NFFlatten.resolveConnections: time 0.001332/0.7643, allocations: 1.359 MB / 0.7702 GB, free: 1.27 MB / 0.5762 GB Notification: Performance of NFEvalConstants.evaluate: time 0.001287/0.7656, allocations: 1.111 MB / 0.7713 GB, free: 1.27 MB / 0.5762 GB Notification: Performance of NFSimplifyModel.simplify: time 0.001811/0.7674, allocations: 1.996 MB / 0.7733 GB, free: 1.266 MB / 0.5762 GB Notification: Performance of NFPackage.collectConstants: time 0.0001743/0.7676, allocations: 115.8 kB / 0.7734 GB, free: 1.266 MB / 0.5762 GB Notification: Performance of NFFlatten.collectFunctions: time 0.0003328/0.7679, allocations: 163.1 kB / 0.7735 GB, free: 1.262 MB / 0.5762 GB Notification: Performance of NFScalarize.scalarize: time 0.0004627/0.7684, allocations: 0.7104 MB / 0.7742 GB, free: 1.262 MB / 0.5762 GB Notification: Performance of NFVerifyModel.verify: time 0.0007595/0.7692, allocations: 1.002 MB / 0.7752 GB, free: 1.109 MB / 0.5762 GB Notification: Performance of NFConvertDAE.convert: time 0.001499/0.7707, allocations: 2.418 MB / 0.7776 GB, free: 0.5938 MB / 0.5762 GB Notification: Performance of FrontEnd - DAE generated: time 3.637e-06/0.7707, allocations: 0 / 0.7776 GB, free: 0.5938 MB / 0.5762 GB Notification: Performance of FrontEnd: time 1.663e-06/0.7707, allocations: 0 / 0.7776 GB, free: 0.5938 MB / 0.5762 GB Notification: Performance of Transformations before backend: time 2.603e-05/0.7707, allocations: 0 / 0.7776 GB, free: 0.5938 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: 205 * Number of variables: 205 Notification: Performance of Generate backend data structure: time 0.003649/0.7744, allocations: 2.96 MB / 0.7804 GB, free: 15 MB / 0.5919 GB Notification: Performance of prepare preOptimizeDAE: time 3.144e-05/0.7744, allocations: 9.547 kB / 0.7805 GB, free: 15 MB / 0.5919 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0003134/0.7748, allocations: 310.2 kB / 0.7808 GB, free: 14.84 MB / 0.5919 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001519/0.7763, allocations: 1.283 MB / 0.782 GB, free: 14.19 MB / 0.5919 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0001237/0.7764, allocations: 104.9 kB / 0.7821 GB, free: 14.16 MB / 0.5919 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001288/0.7766, allocations: 90.58 kB / 0.7822 GB, free: 14.15 MB / 0.5919 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001406/0.778, allocations: 0.9627 MB / 0.7831 GB, free: 14.07 MB / 0.5919 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.22e-05/0.778, allocations: 1 kB / 0.7831 GB, free: 14.07 MB / 0.5919 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 7.152e-05/0.7781, allocations: 35.97 kB / 0.7832 GB, free: 14.07 MB / 0.5919 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.328e-05/0.7781, allocations: 18.25 kB / 0.7832 GB, free: 14.07 MB / 0.5919 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001298/0.7794, allocations: 0.8159 MB / 0.784 GB, free: 14.07 MB / 0.5919 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.005318/0.7847, allocations: 4.379 MB / 0.7883 GB, free: 12.37 MB / 0.5919 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001577/0.7863, allocations: 0.9346 MB / 0.7892 GB, free: 12.34 MB / 0.5919 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0007664/0.7871, allocations: 0.5183 MB / 0.7897 GB, free: 12.32 MB / 0.5919 GB Notification: Performance of preOpt evalFunc (simulation): time 6.325e-05/0.7872, allocations: 15.69 kB / 0.7897 GB, free: 12.32 MB / 0.5919 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0008253/0.788, allocations: 0.5485 MB / 0.7902 GB, free: 12.27 MB / 0.5919 GB Notification: Performance of pre-optimization done (n=91): time 4.488e-06/0.788, allocations: 0 / 0.7902 GB, free: 12.27 MB / 0.5919 GB Notification: Performance of matching and sorting (n=91): time 0.004594/0.7926, allocations: 2.161 MB / 0.7923 GB, free: 11.85 MB / 0.5919 GB Notification: Performance of inlineWhenForInitialization (initialization): time 5.571e-05/0.7927, allocations: 65.86 kB / 0.7924 GB, free: 11.79 MB / 0.5919 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.00369/0.7964, allocations: 4.439 MB / 0.7967 GB, free: 11.55 MB / 0.5919 GB Notification: Performance of collectPreVariables (initialization): time 7.353e-05/0.7965, allocations: 52.62 kB / 0.7968 GB, free: 11.52 MB / 0.5919 GB Notification: Performance of collectInitialEqns (initialization): time 0.0007777/0.7973, allocations: 1.215 MB / 0.798 GB, free: 11.34 MB / 0.5919 GB Notification: Performance of collectInitialBindings (initialization): time 0.0002137/0.7975, allocations: 293 kB / 0.7983 GB, free: 11.16 MB / 0.5919 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.000241/0.7977, allocations: 159.2 kB / 0.7984 GB, free: 11.14 MB / 0.5919 GB Notification: Performance of setup shared object (initialization): time 0.0001164/0.7979, allocations: 345.7 kB / 0.7987 GB, free: 10.84 MB / 0.5919 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0007074/0.7986, allocations: 397.3 kB / 0.7991 GB, free: 10.83 MB / 0.5919 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0008108/0.7994, allocations: 0.5475 MB / 0.7996 GB, free: 10.69 MB / 0.5919 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001414/0.8008, allocations: 0.9263 MB / 0.8006 GB, free: 10.57 MB / 0.5919 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 5.31e-06/0.8008, allocations: 2.281 kB / 0.8006 GB, free: 10.57 MB / 0.5919 GB Notification: Performance of matching and sorting (n=118) (initialization): time 0.002397/0.8032, allocations: 1.493 MB / 0.802 GB, free: 10.34 MB / 0.5919 GB Notification: Performance of prepare postOptimizeDAE: time 1.772e-05/0.8033, allocations: 9.594 kB / 0.802 GB, free: 10.34 MB / 0.5919 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 9.367e-06/0.8033, allocations: 2.906 kB / 0.802 GB, free: 10.34 MB / 0.5919 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0006471/0.8039, allocations: 264.3 kB / 0.8023 GB, free: 10.32 MB / 0.5919 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.000626/0.8046, allocations: 168.8 kB / 0.8024 GB, free: 10.32 MB / 0.5919 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.004727/0.8093, allocations: 4.749 MB / 0.8071 GB, free: 7.422 MB / 0.5919 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.000807/0.8101, allocations: 135.6 kB / 0.8072 GB, free: 7.375 MB / 0.5919 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 6.697e-05/0.8102, allocations: 34.27 kB / 0.8072 GB, free: 7.375 MB / 0.5919 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 15 * Number of states: 0 () * Number of discrete variables: 36 (assEqu.nFai,$PRE.assEqu.nFai,$whenCondition8,$PRE.intGai.nextTimeEvent,$whenCondition7,$PRE.reference.nextTimeEvent,$whenCondition6,$PRE.outdoorTemp1.nextTimeEvent,$whenCondition5,$PRE.tableSolRadWindow.nextTimeEvent,$whenCondition4,$PRE.tableSolRadWall.nextTimeEvent,$whenCondition3,$whenCondition1,mean.y_last,$PRE.mean.y_last,assEqu.satisfied,$PRE.assEqu.satisfied,reference.nextTimeEventScaled,$PRE.reference.nextTimeEventScaled,reference.nextTimeEvent,$whenCondition2,tableSolRadWall.nextTimeEventScaled,$PRE.tableSolRadWall.nextTimeEventScaled,tableSolRadWall.nextTimeEvent,greaterThreshold2.y,greaterThreshold1.y,tableSolRadWindow.nextTimeEventScaled,$PRE.tableSolRadWindow.nextTimeEventScaled,tableSolRadWindow.nextTimeEvent,outdoorTemp1.nextTimeEventScaled,$PRE.outdoorTemp1.nextTimeEventScaled,outdoorTemp1.nextTimeEvent,intGai.nextTimeEventScaled,$PRE.intGai.nextTimeEventScaled,intGai.nextTimeEvent) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (96): * Single equations (assignments): 94 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 2 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 2 systems {(1,3,100.0%), (2,18,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 0 systems Notification: Performance of prepare postOptimizeDAE: time 0.0009366/0.8111, allocations: 0.7636 MB / 0.808 GB, free: 7.262 MB / 0.5919 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0002746/0.8114, allocations: 277.6 kB / 0.8082 GB, free: 7.113 MB / 0.5919 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0004836/0.8119, allocations: 342 kB / 0.8086 GB, free: 7.078 MB / 0.5919 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 6.522e-06/0.8119, allocations: 9.266 kB / 0.8086 GB, free: 7.078 MB / 0.5919 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 2.064e-05/0.812, allocations: 10.62 kB / 0.8086 GB, free: 7.07 MB / 0.5919 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 1.036e-05/0.812, allocations: 12.33 kB / 0.8086 GB, free: 7.066 MB / 0.5919 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.004434/0.8164, allocations: 2.971 MB / 0.8115 GB, free: 6.535 MB / 0.5919 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 5.831e-06/0.8164, allocations: 3.984 kB / 0.8115 GB, free: 6.531 MB / 0.5919 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0004473/0.8169, allocations: 100.9 kB / 0.8116 GB, free: 6.516 MB / 0.5919 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0005776/0.8175, allocations: 246.7 kB / 0.8118 GB, free: 6.457 MB / 0.5919 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 6.859e-05/0.8176, allocations: 37.62 kB / 0.8119 GB, free: 6.441 MB / 0.5919 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.004458/0.822, allocations: 4.747 MB / 0.8165 GB, free: 3.227 MB / 0.5919 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.573e-06/0.822, allocations: 0.7812 kB / 0.8165 GB, free: 3.227 MB / 0.5919 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.003133/0.8252, allocations: 2.024 MB / 0.8185 GB, free: 2.488 MB / 0.5919 GB Notification: Performance of postOpt removeConstants (simulation): time 0.00068/0.8259, allocations: 396.1 kB / 0.8189 GB, free: 2.117 MB / 0.5919 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0002161/0.8261, allocations: 27.28 kB / 0.8189 GB, free: 2.109 MB / 0.5919 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0005963/0.8267, allocations: 52.44 kB / 0.8189 GB, free: 2.07 MB / 0.5919 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001923/0.8269, allocations: 88.19 kB / 0.819 GB, free: 2 MB / 0.5919 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 7.275e-05/0.827, allocations: 29.61 kB / 0.8191 GB, free: 1.977 MB / 0.5919 GB Notification: Performance of sorting global known variables: time 0.003398/0.8304, allocations: 3.252 MB / 0.8222 GB, free: 15.59 MB / 0.6075 GB Notification: Performance of sort global known variables: time 2.71e-07/0.8304, allocations: 0 / 0.8222 GB, free: 15.59 MB / 0.6075 GB Notification: Performance of remove unused functions: time 0.00101/0.8314, allocations: 350.4 kB / 0.8226 GB, free: 15.28 MB / 0.6075 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 4 (thermalZoneTwoElements.extWallRC.thermCapExt[1].T,thermalZoneTwoElements.intWallRC.thermCapInt[1].T,assEqu.diff,mean.x) * Number of discrete variables: 23 ($whenCondition8,$whenCondition7,$whenCondition6,$whenCondition5,$whenCondition4,$whenCondition3,$whenCondition2,$whenCondition1,intGai.nextTimeEvent,intGai.nextTimeEventScaled,reference.nextTimeEvent,reference.nextTimeEventScaled,outdoorTemp1.nextTimeEvent,outdoorTemp1.nextTimeEventScaled,tableSolRadWindow.nextTimeEvent,tableSolRadWindow.nextTimeEventScaled,greaterThreshold1.y,greaterThreshold2.y,tableSolRadWall.nextTimeEvent,tableSolRadWall.nextTimeEventScaled,assEqu.satisfied,assEqu.nFai,mean.y_last) * Number of discrete states: 13 (intGai.nextTimeEvent,reference.nextTimeEvent,outdoorTemp1.nextTimeEvent,tableSolRadWindow.nextTimeEvent,tableSolRadWall.nextTimeEvent,mean.x,assEqu.satisfied,assEqu.nFai,tableSolRadWall.nextTimeEventScaled,tableSolRadWindow.nextTimeEventScaled,outdoorTemp1.nextTimeEventScaled,reference.nextTimeEventScaled,intGai.nextTimeEventScaled) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (69): * Single equations (assignments): 55 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 12 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 2 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 2 systems {(2,18,100.0%), (1,3,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 0 systems Notification: Performance of Backend phase and start with SimCode phase: time 0.001156/0.8326, allocations: 0.4925 MB / 0.823 GB, free: 15.04 MB / 0.6075 GB Notification: Performance of simCode: created initialization part: time 0.0023/0.8349, allocations: 1.281 MB / 0.8243 GB, free: 13.92 MB / 0.6075 GB Notification: Performance of simCode: created event and clocks part: time 2.595e-06/0.8349, allocations: 3.938 kB / 0.8243 GB, free: 13.92 MB / 0.6075 GB Notification: Performance of simCode: created simulation system equations: time 0.00123/0.8361, allocations: 0.8069 MB / 0.8251 GB, free: 13.1 MB / 0.6075 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001502/0.8377, allocations: 360.4 kB / 0.8254 GB, free: 12.77 MB / 0.6075 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.007301/0.845, allocations: 5.268 MB / 0.8306 GB, free: 7.488 MB / 0.6075 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001669/0.8467, allocations: 1.817 MB / 0.8324 GB, free: 5.633 MB / 0.6075 GB Notification: Performance of simCode: alias equations: time 0.0006276/0.8473, allocations: 215.8 kB / 0.8326 GB, free: 5.418 MB / 0.6075 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0002499/0.8476, allocations: 87.41 kB / 0.8326 GB, free: 5.332 MB / 0.6075 GB Notification: Performance of SimCode: time 7.51e-07/0.8476, allocations: 0 / 0.8326 GB, free: 5.332 MB / 0.6075 GB Notification: Performance of Templates: time 0.03326/0.8808, allocations: 17.61 MB / 0.8498 GB, free: 3.973 MB / 0.6231 GB make -j1 -f IDEAS_dev_IDEAS.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8.makefile (rm -f IDEAS_dev_IDEAS.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8.pipe ; mkfifo IDEAS_dev_IDEAS.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8.pipe ; head -c 1048576 < IDEAS_dev_IDEAS.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8.pipe >> ../files/IDEAS_dev_IDEAS.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8.sim & ./IDEAS_dev_IDEAS.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8 -abortSlowSimulation -alarm=480 -s gbode -lv LOG_STATS > IDEAS_dev_IDEAS.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8.pipe 2>&1)