Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_8_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase12.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 3.2.3+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/package.mo", uses=false) Using package Buildings with version 8.1.4 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/package.mo) Using package Modelica with version 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+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(Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase12,tolerance=1e-06,outputFormat="empty",numberOfIntervals=172800,variableFilter="",fileNamePrefix="Buildings_8_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase12") translateModel(Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase12,tolerance=1e-06,outputFormat="empty",numberOfIntervals=172800,variableFilter="",fileNamePrefix="Buildings_8_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase12") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001552/0.001552, allocations: 104.2 kB / 15.99 MB, free: 6.355 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001865/0.001865, allocations: 195.9 kB / 16.91 MB, free: 6.188 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.622/1.622, allocations: 205.1 MB / 222.8 MB, free: 4.691 MB / 174.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/package.mo): time 1.689/1.689, allocations: 292.3 MB / 0.5492 GB, free: 13.6 MB / 462.1 MB Notification: Modelica requested package Complex of version 3.2.3. Complex 4.0.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Modelica requested package ModelicaServices of version 3.2.3. ModelicaServices 4.0.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Performance of FrontEnd - loaded program: time 0.001469/0.001469, allocations: 68.86 kB / 0.6716 GB, free: 26.46 MB / 0.5294 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.2673/0.2687, allocations: 114.6 MB / 0.7835 GB, free: 13.91 MB / 0.6075 GB Notification: Performance of NFInst.instantiate(Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase12): time 0.7137/0.9825, allocations: 159.9 MB / 0.9397 GB, free: 6.719 MB / 0.7325 GB Notification: Performance of NFInst.instExpressions: time 0.02927/1.012, allocations: 22.78 MB / 0.9619 GB, free: 6.5 MB / 0.7325 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.004136/1.016, allocations: 56.91 kB / 0.962 GB, free: 6.5 MB / 0.7325 GB Notification: Performance of NFTyping.typeComponents: time 0.00461/1.021, allocations: 2.544 MB / 0.9645 GB, free: 6.438 MB / 0.7325 GB Notification: Performance of NFTyping.typeBindings: time 0.005453/1.026, allocations: 2.121 MB / 0.9665 GB, free: 6.371 MB / 0.7325 GB Notification: Performance of NFTyping.typeClassSections: time 0.003298/1.029, allocations: 0.9983 MB / 0.9675 GB, free: 6.352 MB / 0.7325 GB Notification: Performance of NFFlatten.flatten: time 0.005664/1.035, allocations: 3.377 MB / 0.9708 GB, free: 6.352 MB / 0.7325 GB Notification: Performance of NFFlatten.resolveConnections: time 0.003453/1.039, allocations: 1.66 MB / 0.9724 GB, free: 6.172 MB / 0.7325 GB Notification: Performance of NFEvalConstants.evaluate: time 0.004221/1.043, allocations: 1.436 MB / 0.9738 GB, free: 6.164 MB / 0.7325 GB Notification: Performance of NFSimplifyModel.simplify: time 0.00384/1.047, allocations: 2.201 MB / 0.976 GB, free: 5.973 MB / 0.7325 GB Notification: Performance of NFPackage.collectConstants: time 0.0007119/1.047, allocations: 145.1 kB / 0.9761 GB, free: 5.969 MB / 0.7325 GB Notification: Performance of NFFlatten.collectFunctions: time 0.002542/1.05, allocations: 0.6119 MB / 0.9767 GB, free: 5.957 MB / 0.7325 GB Notification: Performance of NFScalarize.scalarize: time 0.001146/1.051, allocations: 0.7316 MB / 0.9774 GB, free: 5.844 MB / 0.7325 GB Notification: Performance of NFVerifyModel.verify: time 0.001727/1.053, allocations: 1.085 MB / 0.9785 GB, free: 5.406 MB / 0.7325 GB Notification: Performance of NFConvertDAE.convert: time 0.002817/1.056, allocations: 2.169 MB / 0.9806 GB, free: 5.211 MB / 0.7325 GB Notification: Performance of FrontEnd - DAE generated: time 6.292e-06/1.056, allocations: 0.6562 kB / 0.9806 GB, free: 5.211 MB / 0.7325 GB Notification: Performance of FrontEnd: time 1.823e-06/1.056, allocations: 0 / 0.9806 GB, free: 5.211 MB / 0.7325 GB Notification: Performance of Transformations before backend: time 7.468e-05/1.056, allocations: 0.9375 kB / 0.9806 GB, free: 5.211 MB / 0.7325 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 236 * Number of variables: 236 Notification: Performance of Generate backend data structure: time 0.00516/1.061, allocations: 2.924 MB / 0.9835 GB, free: 19.67 MB / 0.7481 GB Notification: Performance of prepare preOptimizeDAE: time 4.92e-05/1.061, allocations: 7.469 kB / 0.9835 GB, free: 19.67 MB / 0.7481 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0005798/1.062, allocations: 303.1 kB / 0.9838 GB, free: 19.51 MB / 0.7481 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.002109/1.064, allocations: 1.475 MB / 0.9852 GB, free: 18.88 MB / 0.7481 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0001588/1.064, allocations: 117.8 kB / 0.9853 GB, free: 18.84 MB / 0.7481 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001415/1.064, allocations: 96.16 kB / 0.9854 GB, free: 18.84 MB / 0.7481 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001916/1.066, allocations: 1.097 MB / 0.9865 GB, free: 18.75 MB / 0.7481 GB Notification: Performance of preOpt findStateOrder (simulation): time 3.016e-05/1.066, allocations: 2.906 kB / 0.9865 GB, free: 18.75 MB / 0.7481 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 9.161e-05/1.066, allocations: 40.92 kB / 0.9865 GB, free: 18.75 MB / 0.7481 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.724e-05/1.066, allocations: 21.5 kB / 0.9865 GB, free: 18.75 MB / 0.7481 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001488/1.068, allocations: 0.873 MB / 0.9874 GB, free: 18.74 MB / 0.7481 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 0.007278/1.075, allocations: 5.224 MB / 0.9925 GB, free: 15.73 MB / 0.7481 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001865/1.077, allocations: 0.9529 MB / 0.9934 GB, free: 15.38 MB / 0.7481 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0008483/1.078, allocations: 0.5253 MB / 0.9939 GB, free: 15.2 MB / 0.7481 GB Notification: Performance of preOpt evalFunc (simulation): time 0.000513/1.078, allocations: 0.5055 MB / 0.9944 GB, free: 14.62 MB / 0.7481 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0009784/1.079, allocations: 0.5541 MB / 0.995 GB, free: 14.42 MB / 0.7481 GB Notification: Performance of pre-optimization done (n=95): time 3.757e-06/1.079, allocations: 1.031 kB / 0.995 GB, free: 14.42 MB / 0.7481 GB Notification: Performance of matching and sorting (n=95): time 0.004649/1.084, allocations: 2.154 MB / 0.9971 GB, free: 13.49 MB / 0.7481 GB Notification: Performance of inlineWhenForInitialization (initialization): time 6.804e-05/1.084, allocations: 66.59 kB / 0.9971 GB, free: 13.42 MB / 0.7481 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.005015/1.089, allocations: 3.898 MB / 1.001 GB, free: 12.22 MB / 0.7481 GB Notification: Performance of collectPreVariables (initialization): time 0.0004124/1.089, allocations: 50.2 kB / 1.001 GB, free: 12.18 MB / 0.7481 GB Notification: Performance of collectInitialEqns (initialization): time 0.001465/1.091, allocations: 1.134 MB / 1.002 GB, free: 11.3 MB / 0.7481 GB Notification: Performance of collectInitialBindings (initialization): time 0.0006222/1.092, allocations: 305.2 kB / 1.002 GB, free: 11.07 MB / 0.7481 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0003567/1.092, allocations: 183.5 kB / 1.003 GB, free: 10.98 MB / 0.7481 GB Notification: Performance of setup shared object (initialization): time 0.0002072/1.092, allocations: 343.1 kB / 1.003 GB, free: 10.66 MB / 0.7481 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0009909/1.093, allocations: 395.5 kB / 1.003 GB, free: 10.54 MB / 0.7481 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.001052/1.094, allocations: 0.5751 MB / 1.004 GB, free: 10.22 MB / 0.7481 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001846/1.096, allocations: 0.9702 MB / 1.005 GB, free: 9.742 MB / 0.7481 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 7.725e-06/1.096, allocations: 4 kB / 1.005 GB, free: 9.738 MB / 0.7481 GB Notification: Performance of matching and sorting (n=128) (initialization): time 0.003389/1.099, allocations: 1.483 MB / 1.006 GB, free: 9.102 MB / 0.7481 GB Notification: Performance of prepare postOptimizeDAE: time 2.619e-05/1.1, allocations: 8.031 kB / 1.006 GB, free: 9.102 MB / 0.7481 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.2e-05/1.1, allocations: 2.781 kB / 1.006 GB, free: 9.102 MB / 0.7481 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0006335/1.1, allocations: 228.3 kB / 1.006 GB, free: 8.996 MB / 0.7481 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0007153/1.101, allocations: 196.4 kB / 1.007 GB, free: 8.957 MB / 0.7481 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.004912/1.106, allocations: 4.679 MB / 1.011 GB, free: 4.844 MB / 0.7481 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001482/1.107, allocations: 135.9 kB / 1.011 GB, free: 4.762 MB / 0.7481 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001067/1.107, allocations: 40.31 kB / 1.011 GB, free: 4.754 MB / 0.7481 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 19 * Number of states: 0 () * Number of discrete variables: 35 (assEqu.nFai,$PRE.assEqu.nFai,$whenCondition8,$PRE.intGai.nextTimeEvent,$whenCondition7,$PRE.reference.nextTimeEvent,$whenCondition6,$PRE.outdoorTemp.nextTimeEvent,$whenCondition5,$PRE.tableSolRadWindow.nextTimeEvent,$whenCondition4,$PRE.ventRate.nextTimeEvent,$whenCondition3,$whenCondition1,mean.y,$PRE.mean.y,assEqu.satisfied,$PRE.assEqu.satisfied,reference.nextTimeEventScaled,$PRE.reference.nextTimeEventScaled,reference.nextTimeEvent,$whenCondition2,ventRate.nextTimeEventScaled,$PRE.ventRate.nextTimeEventScaled,ventRate.nextTimeEvent,greaterThreshold1.y,tableSolRadWindow.nextTimeEventScaled,$PRE.tableSolRadWindow.nextTimeEventScaled,tableSolRadWindow.nextTimeEvent,outdoorTemp.nextTimeEventScaled,$PRE.outdoorTemp.nextTimeEventScaled,outdoorTemp.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 (110): * Single equations (assignments): 108 * 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 {(2,14,100.0%), (1,3,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 0 systems Notification: Performance of prepare postOptimizeDAE: time 0.0015/1.109, allocations: 0.72 MB / 1.012 GB, free: 4.375 MB / 0.7481 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0005558/1.11, allocations: 264.5 kB / 1.012 GB, free: 4.23 MB / 0.7481 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.002985/1.113, allocations: 1.472 MB / 1.014 GB, free: 3.453 MB / 0.7481 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.681e-05/1.113, allocations: 8.406 kB / 1.014 GB, free: 3.453 MB / 0.7481 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 8.556e-06/1.113, allocations: 2.562 kB / 1.014 GB, free: 3.453 MB / 0.7481 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.00217/1.115, allocations: 1.364 MB / 1.015 GB, free: 2.582 MB / 0.7481 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.005844/1.121, allocations: 3.085 MB / 1.018 GB, free: 0.6914 MB / 0.7481 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 8.686e-06/1.121, allocations: 0 / 1.018 GB, free: 0.6914 MB / 0.7481 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0005252/1.121, allocations: 122.3 kB / 1.018 GB, free: 0.6641 MB / 0.7481 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.00076/1.122, allocations: 260.9 kB / 1.018 GB, free: 0.5312 MB / 0.7481 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 7.292e-05/1.122, allocations: 26.77 kB / 1.019 GB, free: 0.5156 MB / 0.7481 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.005119/1.127, allocations: 5.229 MB / 1.024 GB, free: 11.85 MB / 0.7637 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 6.082e-06/1.127, allocations: 9.188 kB / 1.024 GB, free: 11.84 MB / 0.7637 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.004091/1.131, allocations: 2.042 MB / 1.026 GB, free: 10.71 MB / 0.7637 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0009957/1.132, allocations: 404.9 kB / 1.026 GB, free: 10.38 MB / 0.7637 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0002404/1.133, allocations: 19.59 kB / 1.026 GB, free: 10.37 MB / 0.7637 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0007065/1.133, allocations: 71.91 kB / 1.026 GB, free: 10.33 MB / 0.7637 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.000237/1.134, allocations: 89.66 kB / 1.026 GB, free: 10.29 MB / 0.7637 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 8.039e-05/1.134, allocations: 41.25 kB / 1.026 GB, free: 10.27 MB / 0.7637 GB Notification: Performance of sorting global known variables: time 0.003684/1.137, allocations: 2.836 MB / 1.029 GB, free: 8.305 MB / 0.7637 GB Notification: Performance of sort global known variables: time 4.11e-07/1.137, allocations: 0 / 1.029 GB, free: 8.305 MB / 0.7637 GB Notification: Performance of remove unused functions: time 0.001887/1.139, allocations: 451.1 kB / 1.029 GB, free: 7.863 MB / 0.7637 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 3 * Number of states: 6 (thermalZoneTwoElements.volAir.dynBal.U,thermalZoneTwoElements.volAir.dynBal.m,thermalZoneTwoElements.extWallRC.thermCapExt[1].T,thermalZoneTwoElements.intWallRC.thermCapInt[1].T,assEqu.diff,mean.x) * Number of discrete variables: 22 ($whenCondition8,$whenCondition7,$whenCondition6,$whenCondition5,$whenCondition4,$whenCondition3,$whenCondition2,$whenCondition1,intGai.nextTimeEvent,intGai.nextTimeEventScaled,reference.nextTimeEvent,reference.nextTimeEventScaled,outdoorTemp.nextTimeEvent,outdoorTemp.nextTimeEventScaled,tableSolRadWindow.nextTimeEvent,tableSolRadWindow.nextTimeEventScaled,greaterThreshold1.y,ventRate.nextTimeEvent,ventRate.nextTimeEventScaled,assEqu.satisfied,assEqu.nFai,mean.y) * Number of discrete states: 13 (intGai.nextTimeEvent,reference.nextTimeEvent,outdoorTemp.nextTimeEvent,tableSolRadWindow.nextTimeEvent,ventRate.nextTimeEvent,mean.x,assEqu.satisfied,assEqu.nFai,ventRate.nextTimeEventScaled,tableSolRadWindow.nextTimeEventScaled,outdoorTemp.nextTimeEventScaled,reference.nextTimeEventScaled,intGai.nextTimeEventScaled) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (77): * Single equations (assignments): 60 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 2 * When equations: 12 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 3 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 2 systems {(2,14,100.0%), (1,3,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 1 system {(1,2)} Notification: Performance of Backend phase and start with SimCode phase: time 0.001546/1.141, allocations: 0.6353 MB / 1.03 GB, free: 7.441 MB / 0.7637 GB Notification: Performance of simCode: created initialization part: time 0.00355/1.144, allocations: 1.475 MB / 1.031 GB, free: 5.965 MB / 0.7637 GB Notification: Performance of simCode: created event and clocks part: time 6.492e-06/1.144, allocations: 4.188 kB / 1.031 GB, free: 5.961 MB / 0.7637 GB Notification: Performance of simCode: created simulation system equations: time 0.001599/1.146, allocations: 0.8346 MB / 1.032 GB, free: 5.117 MB / 0.7637 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.002664/1.149, allocations: 0.5003 MB / 1.033 GB, free: 4.641 MB / 0.7637 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.009246/1.158, allocations: 5.982 MB / 1.039 GB, free: 14.63 MB / 0.7794 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001618/1.16, allocations: 1.749 MB / 1.04 GB, free: 12.86 MB / 0.7794 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0004935/1.16, allocations: 107.4 kB / 1.04 GB, free: 12.75 MB / 0.7794 GB Notification: Performance of SimCode: time 1.242e-06/1.16, allocations: 4 kB / 1.04 GB, free: 12.75 MB / 0.7794 GB Notification: Performance of Templates: time 0.06779/1.228, allocations: 48.38 MB / 1.088 GB, free: 12.46 MB / 0.8262 GB make -j1 -f Buildings_8_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase12.makefile (rm -f Buildings_8_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase12.pipe ; mkfifo Buildings_8_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase12.pipe ; head -c 1048576 < Buildings_8_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase12.pipe >> ../files/Buildings_8_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase12.sim & ./Buildings_8_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase12 -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_8_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase12.pipe 2>&1)