Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_8_Buildings.Fluid.HeatPumps.Validation.ScrollWaterToWater_Dynamic.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.Fluid.HeatPumps.Validation.ScrollWaterToWater_Dynamic,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8_Buildings.Fluid.HeatPumps.Validation.ScrollWaterToWater_Dynamic") translateModel(Buildings.Fluid.HeatPumps.Validation.ScrollWaterToWater_Dynamic,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8_Buildings.Fluid.HeatPumps.Validation.ScrollWaterToWater_Dynamic") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001199/0.001199, allocations: 107.2 kB / 15.99 MB, free: 6.348 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001155/0.001155, allocations: 189.2 kB / 16.91 MB, free: 6.184 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.483/1.483, allocations: 205.1 MB / 222.8 MB, free: 4.707 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 1.653/1.653, allocations: 292.3 MB / 0.5492 GB, free: 13.62 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 0.001851/0.001851, allocations: 69.7 kB / 0.6716 GB, free: 26.53 MB / 0.5294 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.2501/0.252, allocations: 114.5 MB / 0.7835 GB, free: 13.93 MB / 0.6075 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.HeatPumps.Validation.ScrollWaterToWater_Dynamic): time 0.1115/0.3635, allocations: 129.6 MB / 0.9101 GB, free: 11.86 MB / 0.7325 GB Notification: Performance of NFInst.instExpressions: time 0.5298/0.8934, allocations: 24.59 MB / 0.9341 GB, free: 40.66 MB / 0.7325 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.006448/0.8999, allocations: 122.9 kB / 0.9342 GB, free: 40.66 MB / 0.7325 GB Notification: Performance of NFTyping.typeComponents: time 0.005853/0.9058, allocations: 1.501 MB / 0.9357 GB, free: 40.66 MB / 0.7325 GB Notification: Performance of NFTyping.typeBindings: time 0.01413/0.92, allocations: 4.162 MB / 0.9398 GB, free: 40.5 MB / 0.7325 GB Notification: Performance of NFTyping.typeClassSections: time 0.01047/0.9305, allocations: 3.269 MB / 0.943 GB, free: 40.41 MB / 0.7325 GB Notification: Performance of NFFlatten.flatten: time 0.01512/0.9456, allocations: 8.974 MB / 0.9517 GB, free: 40.39 MB / 0.7325 GB Notification: Performance of NFFlatten.resolveConnections: time 0.008427/0.9541, allocations: 3.161 MB / 0.9548 GB, free: 40.04 MB / 0.7325 GB Notification: Performance of NFEvalConstants.evaluate: time 0.01076/0.9649, allocations: 3.446 MB / 0.9582 GB, free: 39.51 MB / 0.7325 GB Notification: Performance of NFSimplifyModel.simplify: time 0.00587/0.9708, allocations: 2.539 MB / 0.9606 GB, free: 38.96 MB / 0.7325 GB Notification: Performance of NFPackage.collectConstants: time 0.001804/0.9726, allocations: 389.5 kB / 0.961 GB, free: 38.96 MB / 0.7325 GB Notification: Performance of NFFlatten.collectFunctions: time 0.009459/0.9821, allocations: 2.864 MB / 0.9638 GB, free: 38.76 MB / 0.7325 GB Notification: Performance of NFScalarize.scalarize: time 0.002099/0.9842, allocations: 0.8948 MB / 0.9647 GB, free: 38.61 MB / 0.7325 GB Notification: Performance of NFVerifyModel.verify: time 0.005992/0.9902, allocations: 1.999 MB / 0.9666 GB, free: 37.99 MB / 0.7325 GB Notification: Performance of NFConvertDAE.convert: time 0.009583/0.9999, allocations: 5.017 MB / 0.9715 GB, free: 36.54 MB / 0.7325 GB Notification: Performance of FrontEnd - DAE generated: time 7.084e-06/0.9999, allocations: 0 / 0.9715 GB, free: 36.54 MB / 0.7325 GB Notification: Performance of FrontEnd: time 2.424e-06/0.9999, allocations: 1.281 kB / 0.9715 GB, free: 36.54 MB / 0.7325 GB Notification: Performance of Transformations before backend: time 0.0002222/1, allocations: 0 / 0.9715 GB, free: 36.54 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: 579 * Number of variables: 579 Notification: Performance of Generate backend data structure: time 0.01227/1.012, allocations: 4.078 MB / 0.9755 GB, free: 34.03 MB / 0.7325 GB Notification: Performance of prepare preOptimizeDAE: time 5.168e-05/1.012, allocations: 14.44 kB / 0.9755 GB, free: 34.02 MB / 0.7325 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.01176/1.024, allocations: 1.374 MB / 0.9769 GB, free: 33.79 MB / 0.7325 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.006653/1.031, allocations: 2.918 MB / 0.9797 GB, free: 32.14 MB / 0.7325 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0004013/1.031, allocations: 257.3 kB / 0.98 GB, free: 31.99 MB / 0.7325 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0009396/1.032, allocations: 230.5 kB / 0.9802 GB, free: 31.92 MB / 0.7325 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.009874/1.042, allocations: 3.214 MB / 0.9833 GB, free: 29.93 MB / 0.7325 GB Notification: Performance of preOpt findStateOrder (simulation): time 0.000106/1.042, allocations: 7.938 kB / 0.9833 GB, free: 29.92 MB / 0.7325 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0006635/1.043, allocations: 106 kB / 0.9834 GB, free: 29.84 MB / 0.7325 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 8.194e-05/1.043, allocations: 64.33 kB / 0.9835 GB, free: 29.84 MB / 0.7325 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.009566/1.053, allocations: 2.846 MB / 0.9863 GB, free: 28.38 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 0.02237/1.075, allocations: 13.59 MB / 0.9996 GB, free: 16.8 MB / 0.7325 GB Notification: Performance of preOpt comSubExp (simulation): time 0.004542/1.08, allocations: 1.488 MB / 1.001 GB, free: 16.06 MB / 0.7325 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.003159/1.083, allocations: 0.9081 MB / 1.002 GB, free: 15.61 MB / 0.7325 GB Notification: Performance of preOpt evalFunc (simulation): time 0.00151/1.084, allocations: 1.779 MB / 1.004 GB, free: 13.57 MB / 0.7325 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.004023/1.089, allocations: 1.183 MB / 1.005 GB, free: 12.81 MB / 0.7325 GB Notification: Performance of pre-optimization done (n=126): time 7.153e-06/1.089, allocations: 0 / 1.005 GB, free: 12.81 MB / 0.7325 GB Notification: Performance of matching and sorting (n=132): time 0.05705/1.146, allocations: 11.66 MB / 1.016 GB, free: 4.289 MB / 0.7325 GB Notification: Performance of inlineWhenForInitialization (initialization): time 0.000152/1.146, allocations: 0.5838 MB / 1.017 GB, free: 3.574 MB / 0.7325 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.004684/1.151, allocations: 2.6 MB / 1.019 GB, free: 0.957 MB / 0.7325 GB Notification: Performance of collectPreVariables (initialization): time 0.0005075/1.151, allocations: 69.64 kB / 1.019 GB, free: 0.8828 MB / 0.7325 GB Notification: Performance of collectInitialEqns (initialization): time 0.001338/1.152, allocations: 1.327 MB / 1.021 GB, free: 15.55 MB / 0.7481 GB Notification: Performance of collectInitialBindings (initialization): time 0.0007531/1.153, allocations: 454.5 kB / 1.021 GB, free: 15.11 MB / 0.7481 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.001281/1.154, allocations: 474.9 kB / 1.022 GB, free: 14.64 MB / 0.7481 GB Notification: Performance of setup shared object (initialization): time 0.0001005/1.155, allocations: 301.1 kB / 1.022 GB, free: 14.34 MB / 0.7481 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.003973/1.159, allocations: 0.9922 MB / 1.023 GB, free: 13.34 MB / 0.7481 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.004562/1.163, allocations: 1.582 MB / 1.024 GB, free: 11.52 MB / 0.7481 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.00748/1.171, allocations: 2.248 MB / 1.027 GB, free: 9.102 MB / 0.7481 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.288e-05/1.171, allocations: 0 / 1.027 GB, free: 9.102 MB / 0.7481 GB Notification: Performance of matching and sorting (n=225) (initialization): time 0.02362/1.194, allocations: 4.157 MB / 1.031 GB, free: 4.922 MB / 0.7481 GB Notification: Performance of prepare postOptimizeDAE: time 8.48e-05/1.194, allocations: 41.7 kB / 1.031 GB, free: 4.875 MB / 0.7481 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 3.248e-05/1.194, allocations: 12 kB / 1.031 GB, free: 4.863 MB / 0.7481 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.004034/1.199, allocations: 1.161 MB / 1.032 GB, free: 3.703 MB / 0.7481 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.002738/1.201, allocations: 455.2 kB / 1.032 GB, free: 3.258 MB / 0.7481 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.004204/1.205, allocations: 2.383 MB / 1.035 GB, free: 0.832 MB / 0.7481 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.005626/1.211, allocations: 396 kB / 1.035 GB, free: 456 kB / 0.7481 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0005111/1.212, allocations: 103.9 kB / 1.035 GB, free: 352 kB / 0.7481 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.005432/1.217, allocations: 1.484 MB / 1.036 GB, free: 14.86 MB / 0.7637 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.004474/1.222, allocations: 1.566 MB / 1.038 GB, free: 13.05 MB / 0.7637 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.007307/1.229, allocations: 2.225 MB / 1.04 GB, free: 10.66 MB / 0.7637 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 1.805e-05/1.229, allocations: 7.938 kB / 1.04 GB, free: 10.65 MB / 0.7637 GB Notification: Performance of matching and sorting (n=225) (initialization_lambda0): time 0.02355/1.253, allocations: 4.125 MB / 1.044 GB, free: 6.504 MB / 0.7637 GB Notification: Performance of prepare postOptimizeDAE: time 5.941e-05/1.253, allocations: 37.64 kB / 1.044 GB, free: 6.461 MB / 0.7637 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.123e-05/1.253, allocations: 12 kB / 1.044 GB, free: 6.449 MB / 0.7637 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0039/1.257, allocations: 1.166 MB / 1.045 GB, free: 5.285 MB / 0.7637 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.00272/1.259, allocations: 447.2 kB / 1.046 GB, free: 4.848 MB / 0.7637 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.004048/1.263, allocations: 2.392 MB / 1.048 GB, free: 2.41 MB / 0.7637 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.005578/1.269, allocations: 402.5 kB / 1.049 GB, free: 2.02 MB / 0.7637 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0004131/1.269, allocations: 103.9 kB / 1.049 GB, free: 1.918 MB / 0.7637 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 55 * Number of states: 0 () * Number of discrete variables: 10 (realToInteger.y,N.count,$PRE.N.count,N.T_start,$PRE.N.T_start,heaPum1.com.isOn,$PRE.heaPum1.com.isOn,heaPum.com.isOn,$PRE.heaPum.com.isOn,$whenCondition1) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (166): * Single equations (assignments): 163 * Array equations: 0 * Algorithm blocks: 1 * 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): 0 systems * Non-linear torn systems (#iteration vars, #inner vars): 2 systems {(4,25), (4,27)} Notification: Performance of prepare postOptimizeDAE: time 0.0007919/1.27, allocations: 292.1 kB / 1.049 GB, free: 1.625 MB / 0.7637 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.001134/1.271, allocations: 284.6 kB / 1.049 GB, free: 1.344 MB / 0.7637 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.008574/1.28, allocations: 2.397 MB / 1.052 GB, free: 14.95 MB / 0.7794 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 3.172e-05/1.28, allocations: 16 kB / 1.052 GB, free: 14.93 MB / 0.7794 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 1.378e-05/1.28, allocations: 8 kB / 1.052 GB, free: 14.92 MB / 0.7794 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.006872/1.287, allocations: 2.006 MB / 1.054 GB, free: 12.88 MB / 0.7794 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.02288/1.31, allocations: 7.004 MB / 1.06 GB, free: 5.75 MB / 0.7794 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 3.145e-05/1.31, allocations: 8 kB / 1.06 GB, free: 5.742 MB / 0.7794 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001827/1.312, allocations: 268.2 kB / 1.061 GB, free: 5.48 MB / 0.7794 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.003534/1.315, allocations: 1.024 MB / 1.062 GB, free: 4.457 MB / 0.7794 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0002964/1.316, allocations: 51.94 kB / 1.062 GB, free: 4.406 MB / 0.7794 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.003566/1.319, allocations: 2.149 MB / 1.064 GB, free: 2.207 MB / 0.7794 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.193e-05/1.319, allocations: 19.98 kB / 1.064 GB, free: 2.188 MB / 0.7794 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.01477/1.334, allocations: 3.748 MB / 1.067 GB, free: 14.35 MB / 0.795 GB Notification: Performance of postOpt removeConstants (simulation): time 0.002258/1.336, allocations: 0.5834 MB / 1.068 GB, free: 13.75 MB / 0.795 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.001347/1.338, allocations: 36 kB / 1.068 GB, free: 13.71 MB / 0.795 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.004588/1.342, allocations: 279.6 kB / 1.068 GB, free: 13.44 MB / 0.795 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0003498/1.343, allocations: 124.5 kB / 1.068 GB, free: 13.32 MB / 0.795 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0003038/1.343, allocations: 79.92 kB / 1.069 GB, free: 13.24 MB / 0.795 GB Notification: Performance of sorting global known variables: time 0.004352/1.347, allocations: 1.828 MB / 1.07 GB, free: 11.41 MB / 0.795 GB Notification: Performance of sort global known variables: time 1.6e-07/1.347, allocations: 0 / 1.07 GB, free: 11.41 MB / 0.795 GB Notification: Performance of remove unused functions: time 0.007322/1.355, allocations: 1.472 MB / 1.072 GB, free: 9.938 MB / 0.795 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 31 * Number of states: 2 (heaPum1.con.vol.dynBal.U,heaPum1.eva.vol.dynBal.U) * Number of discrete variables: 6 ($whenCondition1,heaPum.com.isOn,heaPum1.com.isOn,N.T_start,N.count,realToInteger.y) * Number of discrete states: 3 (N.count,heaPum1.com.isOn,heaPum.com.isOn) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (82): * Single equations (assignments): 76 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 2 * When equations: 2 * 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): 0 systems * Non-linear torn systems (#iteration vars, #inner vars): 2 systems {(2,19), (4,25)} Notification: Performance of Backend phase and start with SimCode phase: time 0.002647/1.357, allocations: 0.7994 MB / 1.073 GB, free: 9.195 MB / 0.795 GB Notification: Performance of simCode: created initialization part: time 0.01516/1.373, allocations: 3.807 MB / 1.076 GB, free: 5.387 MB / 0.795 GB Notification: Performance of simCode: created event and clocks part: time 1.821e-05/1.373, allocations: 4.438 kB / 1.076 GB, free: 5.383 MB / 0.795 GB Notification: Performance of simCode: created simulation system equations: time 0.004027/1.377, allocations: 1.035 MB / 1.077 GB, free: 4.359 MB / 0.795 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.01005/1.387, allocations: 1.61 MB / 1.079 GB, free: 2.809 MB / 0.795 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.01441/1.401, allocations: 6.049 MB / 1.085 GB, free: 12.67 MB / 0.8106 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001981/1.403, allocations: 1.711 MB / 1.086 GB, free: 10.93 MB / 0.8106 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.001196/1.404, allocations: 275.2 kB / 1.087 GB, free: 10.66 MB / 0.8106 GB Notification: Performance of SimCode: time 1.232e-06/1.404, allocations: 0 / 1.087 GB, free: 10.66 MB / 0.8106 GB Notification: Performance of Templates: time 0.1171/1.522, allocations: 82.51 MB / 1.167 GB, free: 8.602 MB / 0.8887 GB make -j1 -f Buildings_8_Buildings.Fluid.HeatPumps.Validation.ScrollWaterToWater_Dynamic.makefile (rm -f Buildings_8_Buildings.Fluid.HeatPumps.Validation.ScrollWaterToWater_Dynamic.pipe ; mkfifo Buildings_8_Buildings.Fluid.HeatPumps.Validation.ScrollWaterToWater_Dynamic.pipe ; head -c 1048576 < Buildings_8_Buildings.Fluid.HeatPumps.Validation.ScrollWaterToWater_Dynamic.pipe >> ../files/Buildings_8_Buildings.Fluid.HeatPumps.Validation.ScrollWaterToWater_Dynamic.sim & ./Buildings_8_Buildings.Fluid.HeatPumps.Validation.ScrollWaterToWater_Dynamic -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_8_Buildings.Fluid.HeatPumps.Validation.ScrollWaterToWater_Dynamic.pipe 2>&1)