Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_10_Buildings.Fluid.HeatPumps.Examples.Carnot_y.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/Buildings 10.1.1-maint.10.0.x/package.mo", uses=false) Using package Buildings with version 10.1.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 10.1.1-maint.10.0.x/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(Buildings.Fluid.HeatPumps.Examples.Carnot_y,fileNamePrefix="Buildings_10_Buildings_Fluid_HeatPumps_Examples_Carnot_y",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(Buildings.Fluid.HeatPumps.Examples.Carnot_y,fileNamePrefix="Buildings_10_Buildings_Fluid_HeatPumps_Examples_Carnot_y",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 0.001817/0.001817, allocations: 115.3 kB / 15.34 MB, free: 0.5156 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.002313/0.002313, allocations: 192.6 kB / 16.25 MB, free: 6.637 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.298/1.298, allocations: 222.9 MB / 239.9 MB, free: 4.531 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 10.1.1-maint.10.0.x/package.mo): time 2.312/2.312, allocations: 437 MB / 0.7101 GB, free: 5.297 MB / 0.5606 GB Notification: Performance of FrontEnd - loaded program: time 0.001682/0.001682, allocations: 67.91 kB / 0.8689 GB, free: 5 MB / 0.7169 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.6428/0.6445, allocations: 151.6 MB / 1.017 GB, free: 2.723 MB / 0.7637 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.HeatPumps.Examples.Carnot_y): time 0.06302/0.7076, allocations: 74.58 MB / 1.09 GB, free: 7.898 MB / 0.8419 GB Notification: Performance of NFInst.instExpressions: time 0.01792/0.7256, allocations: 15.06 MB / 1.104 GB, free: 8.797 MB / 0.8575 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.001747/0.7273, allocations: 67.56 kB / 1.105 GB, free: 8.73 MB / 0.8575 GB Notification: Performance of NFTyping.typeComponents: time 0.001712/0.7291, allocations: 0.7151 MB / 1.105 GB, free: 8.012 MB / 0.8575 GB Notification: Performance of NFTyping.typeBindings: time 0.004993/0.7341, allocations: 2.413 MB / 1.108 GB, free: 5.59 MB / 0.8575 GB Notification: Performance of NFTyping.typeClassSections: time 0.002678/0.7368, allocations: 1.283 MB / 1.109 GB, free: 4.32 MB / 0.8575 GB Notification: Performance of NFFlatten.flatten: time 0.004742/0.7415, allocations: 4.428 MB / 1.113 GB, free: 15.88 MB / 0.8731 GB Notification: Performance of NFFlatten.resolveConnections: time 0.002163/0.7437, allocations: 1.437 MB / 1.115 GB, free: 14.4 MB / 0.8731 GB Notification: Performance of NFEvalConstants.evaluate: time 0.004283/0.748, allocations: 1.632 MB / 1.116 GB, free: 12.77 MB / 0.8731 GB Notification: Performance of NFSimplifyModel.simplify: time 0.002179/0.7502, allocations: 1.256 MB / 1.117 GB, free: 11.51 MB / 0.8731 GB Notification: Performance of NFPackage.collectConstants: time 0.0004405/0.7506, allocations: 164 kB / 1.118 GB, free: 11.35 MB / 0.8731 GB Notification: Performance of NFFlatten.collectFunctions: time 0.003513/0.7542, allocations: 1.411 MB / 1.119 GB, free: 9.934 MB / 0.8731 GB Notification: Performance of NFScalarize.scalarize: time 0.0005984/0.7548, allocations: 398.6 kB / 1.119 GB, free: 9.543 MB / 0.8731 GB Notification: Performance of NFVerifyModel.verify: time 0.001681/0.7565, allocations: 0.9138 MB / 1.12 GB, free: 8.625 MB / 0.8731 GB Notification: Performance of NFConvertDAE.convert: time 0.005504/0.762, allocations: 2.844 MB / 1.123 GB, free: 5.773 MB / 0.8731 GB Notification: Performance of FrontEnd - DAE generated: time 5.892e-06/0.762, allocations: 0 / 1.123 GB, free: 5.773 MB / 0.8731 GB Notification: Performance of FrontEnd: time 1.663e-06/0.762, allocations: 4 kB / 1.123 GB, free: 5.77 MB / 0.8731 GB Notification: Performance of Transformations before backend: time 0.0001076/0.7621, allocations: 0 / 1.123 GB, free: 5.77 MB / 0.8731 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 240 * Number of variables: 240 Notification: Performance of Generate backend data structure: time 0.005475/0.7676, allocations: 2.075 MB / 1.125 GB, free: 3.629 MB / 0.8731 GB Notification: Performance of prepare preOptimizeDAE: time 4.703e-05/0.7676, allocations: 8.031 kB / 1.125 GB, free: 3.621 MB / 0.8731 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0003116/0.768, allocations: 152.1 kB / 1.125 GB, free: 3.465 MB / 0.8731 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0009887/0.769, allocations: 222.8 kB / 1.125 GB, free: 3.246 MB / 0.8731 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.003066/0.772, allocations: 1.493 MB / 1.127 GB, free: 1.695 MB / 0.8731 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 6.604e-05/0.7721, allocations: 78 kB / 1.127 GB, free: 1.621 MB / 0.8731 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.000167/0.7723, allocations: 107.8 kB / 1.127 GB, free: 1.516 MB / 0.8731 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.002283/0.7746, allocations: 1.108 MB / 1.128 GB, free: 380 kB / 0.8731 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.804e-05/0.7746, allocations: 4 kB / 1.128 GB, free: 376 kB / 0.8731 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 9.033e-05/0.7747, allocations: 40 kB / 1.128 GB, free: 336 kB / 0.8731 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 3.456e-05/0.7748, allocations: 24 kB / 1.128 GB, free: 312 kB / 0.8731 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001862/0.7766, allocations: 0.8978 MB / 1.129 GB, free: 15.41 MB / 0.8887 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 0.006164/0.7828, allocations: 4.9 MB / 1.134 GB, free: 10.22 MB / 0.8887 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001415/0.7842, allocations: 0.617 MB / 1.134 GB, free: 9.598 MB / 0.8887 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0006643/0.7849, allocations: 342.3 kB / 1.135 GB, free: 9.262 MB / 0.8887 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0007386/0.7857, allocations: 0.8316 MB / 1.136 GB, free: 8.246 MB / 0.8887 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.7e-05/0.7857, allocations: 35.12 kB / 1.136 GB, free: 8.203 MB / 0.8887 GB Notification: Performance of pre-optimization done (n=61): time 2.234e-06/0.7857, allocations: 4 kB / 1.136 GB, free: 8.199 MB / 0.8887 GB Notification: Performance of matching and sorting (n=61): time 0.006844/0.7926, allocations: 1.689 MB / 1.137 GB, free: 6.48 MB / 0.8887 GB Notification: Performance of inlineWhenForInitialization (initialization): time 5.681e-05/0.7926, allocations: 55.97 kB / 1.137 GB, free: 6.414 MB / 0.8887 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001824/0.7945, allocations: 1.21 MB / 1.138 GB, free: 5.188 MB / 0.8887 GB Notification: Performance of collectPreVariables (initialization): time 7.574e-05/0.7946, allocations: 49.7 kB / 1.139 GB, free: 5.133 MB / 0.8887 GB Notification: Performance of collectInitialEqns (initialization): time 0.0005441/0.7951, allocations: 0.6026 MB / 1.139 GB, free: 4.523 MB / 0.8887 GB Notification: Performance of collectInitialBindings (initialization): time 0.0002233/0.7953, allocations: 216.9 kB / 1.139 GB, free: 4.309 MB / 0.8887 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0002685/0.7956, allocations: 154.5 kB / 1.139 GB, free: 4.152 MB / 0.8887 GB Notification: Performance of setup shared object (initialization): time 0.0001442/0.7958, allocations: 337.9 kB / 1.14 GB, free: 3.816 MB / 0.8887 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0006655/0.7964, allocations: 288.7 kB / 1.14 GB, free: 3.531 MB / 0.8887 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0008589/0.7973, allocations: 0.4929 MB / 1.141 GB, free: 2.953 MB / 0.8887 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001408/0.7987, allocations: 0.7129 MB / 1.141 GB, free: 2.188 MB / 0.8887 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 5.711e-06/0.7987, allocations: 0 / 1.141 GB, free: 2.188 MB / 0.8887 GB Notification: Performance of matching and sorting (n=88) (initialization): time 0.004553/0.8033, allocations: 1.273 MB / 1.142 GB, free: 0.9023 MB / 0.8887 GB Notification: Performance of prepare postOptimizeDAE: time 2.437e-05/0.8033, allocations: 8 kB / 1.142 GB, free: 0.8945 MB / 0.8887 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.379e-05/0.8034, allocations: 4 kB / 1.142 GB, free: 0.8906 MB / 0.8887 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0006043/0.804, allocations: 133.1 kB / 1.143 GB, free: 0.7578 MB / 0.8887 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0005857/0.8046, allocations: 159.8 kB / 1.143 GB, free: 0.6016 MB / 0.8887 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0008967/0.8055, allocations: 0.7122 MB / 1.143 GB, free: 15.86 MB / 0.9044 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001237/0.8067, allocations: 151 kB / 1.144 GB, free: 15.71 MB / 0.9044 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 8.111e-05/0.8068, allocations: 31.98 kB / 1.144 GB, free: 15.68 MB / 0.9044 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.001093/0.8079, allocations: 0.5566 MB / 1.144 GB, free: 15.12 MB / 0.9044 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0008287/0.8088, allocations: 492.7 kB / 1.145 GB, free: 14.57 MB / 0.9044 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.001368/0.8101, allocations: 0.709 MB / 1.145 GB, free: 13.81 MB / 0.9044 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 2.775e-06/0.8101, allocations: 0 / 1.145 GB, free: 13.81 MB / 0.9044 GB Notification: Performance of matching and sorting (n=88) (initialization_lambda0): time 0.004478/0.8146, allocations: 1.265 MB / 1.147 GB, free: 12.54 MB / 0.9044 GB Notification: Performance of prepare postOptimizeDAE: time 1.465e-05/0.8147, allocations: 4 kB / 1.147 GB, free: 12.53 MB / 0.9044 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 9.247e-06/0.8147, allocations: 7.984 kB / 1.147 GB, free: 12.52 MB / 0.9044 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0004944/0.8152, allocations: 141 kB / 1.147 GB, free: 12.38 MB / 0.9044 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0005597/0.8157, allocations: 167.7 kB / 1.147 GB, free: 12.22 MB / 0.9044 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0007436/0.8165, allocations: 0.7046 MB / 1.148 GB, free: 11.49 MB / 0.9044 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001092/0.8176, allocations: 131.5 kB / 1.148 GB, free: 11.36 MB / 0.9044 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 6.45e-05/0.8177, allocations: 35.98 kB / 1.148 GB, free: 11.32 MB / 0.9044 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 16 * 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 (78): * Single equations (assignments): 77 * 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 {(1,10)} Notification: Performance of prepare postOptimizeDAE: time 0.0002464/0.8179, allocations: 229.5 kB / 1.148 GB, free: 11.09 MB / 0.9044 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0002811/0.8182, allocations: 134.3 kB / 1.148 GB, free: 10.96 MB / 0.9044 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.004423/0.8226, allocations: 1.267 MB / 1.149 GB, free: 9.676 MB / 0.9044 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.662e-05/0.8227, allocations: 19.94 kB / 1.149 GB, free: 9.656 MB / 0.9044 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 6.121e-06/0.8227, allocations: 0 / 1.149 GB, free: 9.656 MB / 0.9044 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.003849/0.8265, allocations: 1.099 MB / 1.15 GB, free: 8.523 MB / 0.9044 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.006225/0.8328, allocations: 2.602 MB / 1.153 GB, free: 5.809 MB / 0.9044 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 7.204e-06/0.8328, allocations: 4 kB / 1.153 GB, free: 5.805 MB / 0.9044 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0004369/0.8332, allocations: 111.8 kB / 1.153 GB, free: 5.695 MB / 0.9044 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0004266/0.8337, allocations: 137.2 kB / 1.153 GB, free: 5.559 MB / 0.9044 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 4.201e-05/0.8337, allocations: 16 kB / 1.153 GB, free: 5.543 MB / 0.9044 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.004418/0.8381, allocations: 2.649 MB / 1.156 GB, free: 2.738 MB / 0.9044 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 4.087e-06/0.8382, allocations: 4 kB / 1.156 GB, free: 2.734 MB / 0.9044 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.004829/0.843, allocations: 1.703 MB / 1.157 GB, free: 0.9648 MB / 0.9044 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0004488/0.8435, allocations: 307.2 kB / 1.158 GB, free: 0.6445 MB / 0.9044 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001676/0.8436, allocations: 19.98 kB / 1.158 GB, free: 0.625 MB / 0.9044 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0007954/0.8444, allocations: 79.91 kB / 1.158 GB, free: 0.5469 MB / 0.9044 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001034/0.8445, allocations: 60.31 kB / 1.158 GB, free: 500 kB / 0.9044 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 5.426e-05/0.8446, allocations: 31.98 kB / 1.158 GB, free: 468 kB / 0.9044 GB Notification: Performance of sorting global known variables: time 0.001029/0.8456, allocations: 0.87 MB / 1.159 GB, free: 15.59 MB / 0.92 GB Notification: Performance of sort global known variables: time 2.21e-07/0.8457, allocations: 0 / 1.159 GB, free: 15.59 MB / 0.92 GB Notification: Performance of remove unused functions: time 0.001562/0.8472, allocations: 0.7057 MB / 1.159 GB, free: 14.88 MB / 0.92 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 15 * Number of states: 2 (heaPum.con.vol.dynBal.U,heaPum.eva.vol.dynBal.U) * 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 (55): * Single equations (assignments): 50 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 4 * 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 {(1,10)} Notification: Performance of Backend phase and start with SimCode phase: time 0.005594/0.8528, allocations: 2.588 MB / 1.162 GB, free: 12.22 MB / 0.92 GB Notification: Performance of simCode: created initialization part: time 0.002415/0.8552, allocations: 1.156 MB / 1.163 GB, free: 11.07 MB / 0.92 GB Notification: Performance of simCode: created event and clocks part: time 3.166e-06/0.8553, allocations: 3.938 kB / 1.163 GB, free: 11.06 MB / 0.92 GB Notification: Performance of simCode: created simulation system equations: time 0.001283/0.8565, allocations: 0.5565 MB / 1.164 GB, free: 10.49 MB / 0.92 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.002913/0.8595, allocations: 0.8024 MB / 1.164 GB, free: 9.719 MB / 0.92 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.02119/0.8807, allocations: 10.85 MB / 1.175 GB, free: 14.36 MB / 0.9356 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0007015/0.8814, allocations: 1.179 MB / 1.176 GB, free: 13.15 MB / 0.9356 GB Notification: Performance of simCode: alias equations: time 0.001045/0.8824, allocations: 306.9 kB / 1.176 GB, free: 12.84 MB / 0.9356 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0006211/0.8831, allocations: 0.5188 MB / 1.177 GB, free: 12.33 MB / 0.9356 GB Notification: Performance of SimCode: time 3.1e-07/0.8831, allocations: 0 / 1.177 GB, free: 12.33 MB / 0.9356 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 1.144/2.027, allocations: 41.59 MB / 1.218 GB, free: 3.289 MB / 0.9669 GB Notification: Performance of buildModelFMU: configured platform static using cached values: time 0.0003638/2.027, allocations: 262.7 kB / 1.218 GB, free: 2.934 MB / 0.9669 GB Notification: Performance of buildModelFMU: Generate platform static: time 3.067/5.094, allocations: 0 / 1.218 GB, free: 2.934 MB / 0.9669 GB (rm -f Buildings_10_Buildings.Fluid.HeatPumps.Examples.Carnot_y.pipe ; mkfifo Buildings_10_Buildings.Fluid.HeatPumps.Examples.Carnot_y.pipe ; head -c 1048576 < Buildings_10_Buildings.Fluid.HeatPumps.Examples.Carnot_y.pipe >> ../files/Buildings_10_Buildings.Fluid.HeatPumps.Examples.Carnot_y.sim & /home/hudson/saved_omc/OMSimulator/install/bin/OMSimulator -r=Buildings_10_Buildings.Fluid.HeatPumps.Examples.Carnot_y_res.mat --tempDir=temp_Buildings_10_Buildings_Fluid_HeatPumps_Examples_Carnot_y_fmu --startTime=0 --stopTime=3600 --timeout=50 --tolerance=1e-06 Buildings_10_Buildings_Fluid_HeatPumps_Examples_Carnot_y.fmu > Buildings_10_Buildings.Fluid.HeatPumps.Examples.Carnot_y.pipe 2>&1)