Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr IDEAS_dev_IDEAS.Fluid.FixedResistances.Validation.PlugFlowPipes.FlowReversal.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.Fluid.FixedResistances.Validation.PlugFlowPipes.FlowReversal,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="IDEAS_dev_IDEAS.Fluid.FixedResistances.Validation.PlugFlowPipes.FlowReversal") translateModel(IDEAS.Fluid.FixedResistances.Validation.PlugFlowPipes.FlowReversal,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="IDEAS_dev_IDEAS.Fluid.FixedResistances.Validation.PlugFlowPipes.FlowReversal") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001491/0.001491, allocations: 103.4 kB / 15.33 MB, free: 0.5078 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001521/0.001522, allocations: 192.9 kB / 16.26 MB, free: 6.621 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.377/1.377, allocations: 222.9 MB / 239.9 MB, free: 4.52 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/package.mo): time 0.9477/0.9477, allocations: 135.6 MB / 425.6 MB, free: 11.95 MB / 350.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001817/0.001817, allocations: 64.77 kB / 0.5054 GB, free: 5.184 MB / 414.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1511/0.1529, allocations: 81.02 MB / 0.5845 GB, free: 4.297 MB / 494.1 MB Notification: Performance of NFInst.instantiate(IDEAS.Fluid.FixedResistances.Validation.PlugFlowPipes.FlowReversal): time 0.2896/0.4425, allocations: 60.2 MB / 0.6433 GB, free: 19.01 MB / 0.4981 GB Notification: Performance of NFInst.instExpressions: time 0.0161/0.4587, allocations: 14.54 MB / 0.6575 GB, free: 8.602 MB / 0.4981 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.002388/0.4611, allocations: 59.59 kB / 0.6575 GB, free: 8.578 MB / 0.4981 GB Notification: Performance of NFTyping.typeComponents: time 0.001561/0.4627, allocations: 0.6135 MB / 0.6581 GB, free: 8.215 MB / 0.4981 GB Notification: Performance of NFTyping.typeBindings: time 0.004393/0.4671, allocations: 2.091 MB / 0.6602 GB, free: 7 MB / 0.4981 GB Notification: Performance of NFTyping.typeClassSections: time 0.003041/0.4702, allocations: 1.535 MB / 0.6617 GB, free: 6.129 MB / 0.4981 GB Notification: Performance of NFFlatten.flatten: time 0.00398/0.4742, allocations: 4.053 MB / 0.6656 GB, free: 4.168 MB / 0.4981 GB Notification: Performance of NFFlatten.resolveConnections: time 0.001426/0.4756, allocations: 1.265 MB / 0.6669 GB, free: 3.559 MB / 0.4981 GB Notification: Performance of NFEvalConstants.evaluate: time 0.003098/0.4787, allocations: 1.595 MB / 0.6684 GB, free: 2.785 MB / 0.4981 GB Notification: Performance of NFSimplifyModel.simplify: time 0.001361/0.4801, allocations: 1.118 MB / 0.6695 GB, free: 2.273 MB / 0.4981 GB Notification: Performance of NFPackage.collectConstants: time 0.0001916/0.4803, allocations: 131.3 kB / 0.6697 GB, free: 2.273 MB / 0.4981 GB Notification: Performance of NFFlatten.collectFunctions: time 0.00303/0.4833, allocations: 1.731 MB / 0.6713 GB, free: 1.629 MB / 0.4981 GB Notification: Performance of NFScalarize.scalarize: time 0.0002882/0.4836, allocations: 342.4 kB / 0.6717 GB, free: 1.414 MB / 0.4981 GB Notification: Performance of NFVerifyModel.verify: time 0.0007401/0.4844, allocations: 0.792 MB / 0.6724 GB, free: 0.9297 MB / 0.4981 GB Notification: Performance of NFConvertDAE.convert: time 0.00362/0.488, allocations: 2.705 MB / 0.6751 GB, free: 15.93 MB / 0.5137 GB Notification: Performance of FrontEnd - DAE generated: time 3.587e-06/0.488, allocations: 5.062 kB / 0.6751 GB, free: 15.93 MB / 0.5137 GB Notification: Performance of FrontEnd: time 9.62e-07/0.488, allocations: 0 / 0.6751 GB, free: 15.93 MB / 0.5137 GB Notification: Performance of Transformations before backend: time 2.309e-05/0.4881, allocations: 0 / 0.6751 GB, free: 15.93 MB / 0.5137 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 215 * Number of variables: 215 Notification: Performance of Generate backend data structure: time 0.003339/0.4914, allocations: 1.845 MB / 0.6769 GB, free: 14.69 MB / 0.5137 GB Notification: Performance of prepare preOptimizeDAE: time 3.373e-05/0.4915, allocations: 9.156 kB / 0.6769 GB, free: 14.69 MB / 0.5137 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0004829/0.492, allocations: 164.9 kB / 0.6771 GB, free: 14.61 MB / 0.5137 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.00229/0.4943, allocations: 1.287 MB / 0.6783 GB, free: 13.84 MB / 0.5137 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 6.054e-05/0.4943, allocations: 68.94 kB / 0.6784 GB, free: 13.8 MB / 0.5137 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001353/0.4945, allocations: 89.66 kB / 0.6785 GB, free: 13.77 MB / 0.5137 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001734/0.4962, allocations: 0.9616 MB / 0.6794 GB, free: 13.3 MB / 0.5137 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.83e-05/0.4962, allocations: 1.781 kB / 0.6794 GB, free: 13.3 MB / 0.5137 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 8.621e-05/0.4963, allocations: 37.75 kB / 0.6794 GB, free: 13.27 MB / 0.5137 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 3.388e-05/0.4964, allocations: 27.97 kB / 0.6795 GB, free: 13.27 MB / 0.5137 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001157/0.4975, allocations: 0.6642 MB / 0.6801 GB, free: 13.02 MB / 0.5137 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 0.006542/0.5041, allocations: 5.21 MB / 0.6852 GB, free: 8.918 MB / 0.5137 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0007816/0.5049, allocations: 396.5 kB / 0.6856 GB, free: 8.762 MB / 0.5137 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0003775/0.5053, allocations: 241.9 kB / 0.6858 GB, free: 8.668 MB / 0.5137 GB Notification: Performance of preOpt evalFunc (simulation): time 0.001529/0.5068, allocations: 1.595 MB / 0.6874 GB, free: 6.855 MB / 0.5137 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.386e-05/0.5069, allocations: 39 kB / 0.6874 GB, free: 6.809 MB / 0.5137 GB Notification: Performance of pre-optimization done (n=53): time 2.625e-06/0.5069, allocations: 0 / 0.6874 GB, free: 6.809 MB / 0.5137 GB Notification: Performance of matching and sorting (n=53): time 0.002427/0.5093, allocations: 0.9397 MB / 0.6883 GB, free: 6.383 MB / 0.5137 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.86e-05/0.5094, allocations: 57.53 kB / 0.6884 GB, free: 6.32 MB / 0.5137 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001464/0.5108, allocations: 0.9857 MB / 0.6893 GB, free: 5.914 MB / 0.5137 GB Notification: Performance of collectPreVariables (initialization): time 7.38e-05/0.5109, allocations: 37.7 kB / 0.6894 GB, free: 5.875 MB / 0.5137 GB Notification: Performance of collectInitialEqns (initialization): time 0.0005092/0.5114, allocations: 0.568 MB / 0.6899 GB, free: 5.422 MB / 0.5137 GB Notification: Performance of collectInitialBindings (initialization): time 0.000232/0.5117, allocations: 194.3 kB / 0.6901 GB, free: 5.27 MB / 0.5137 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0002118/0.5119, allocations: 143.9 kB / 0.6903 GB, free: 5.195 MB / 0.5137 GB Notification: Performance of setup shared object (initialization): time 0.0001662/0.5121, allocations: 332.2 kB / 0.6906 GB, free: 4.879 MB / 0.5137 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0003531/0.5124, allocations: 201.4 kB / 0.6908 GB, free: 4.801 MB / 0.5137 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.000536/0.513, allocations: 401.5 kB / 0.6911 GB, free: 4.492 MB / 0.5137 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0009258/0.5139, allocations: 0.6286 MB / 0.6918 GB, free: 4.051 MB / 0.5137 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 5.771e-06/0.5139, allocations: 2.125 kB / 0.6918 GB, free: 4.051 MB / 0.5137 GB Notification: Performance of matching and sorting (n=84) (initialization): time 0.001867/0.5158, allocations: 0.8343 MB / 0.6926 GB, free: 3.688 MB / 0.5137 GB Notification: Performance of prepare postOptimizeDAE: time 2.058e-05/0.5158, allocations: 8.969 kB / 0.6926 GB, free: 3.688 MB / 0.5137 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.26e-05/0.5159, allocations: 12.86 kB / 0.6926 GB, free: 3.684 MB / 0.5137 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0005324/0.5164, allocations: 103.3 kB / 0.6927 GB, free: 3.66 MB / 0.5137 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0004269/0.5168, allocations: 136.9 kB / 0.6928 GB, free: 3.648 MB / 0.5137 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0005548/0.5174, allocations: 0.6042 MB / 0.6934 GB, free: 3.082 MB / 0.5137 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0009596/0.5184, allocations: 114.8 kB / 0.6935 GB, free: 3.027 MB / 0.5137 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 7.853e-05/0.5185, allocations: 34.98 kB / 0.6936 GB, free: 3.023 MB / 0.5137 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0007403/0.5192, allocations: 437.8 kB / 0.694 GB, free: 2.785 MB / 0.5137 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.000538/0.5198, allocations: 402 kB / 0.6944 GB, free: 2.473 MB / 0.5137 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.0009446/0.5207, allocations: 0.6226 MB / 0.695 GB, free: 2.035 MB / 0.5137 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 3.737e-06/0.5207, allocations: 1.438 kB / 0.695 GB, free: 2.035 MB / 0.5137 GB Notification: Performance of matching and sorting (n=84) (initialization_lambda0): time 0.002102/0.5228, allocations: 0.8286 MB / 0.6958 GB, free: 1.68 MB / 0.5137 GB Notification: Performance of prepare postOptimizeDAE: time 1.543e-05/0.5229, allocations: 8.219 kB / 0.6958 GB, free: 1.68 MB / 0.5137 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.072e-05/0.5229, allocations: 8.172 kB / 0.6958 GB, free: 1.68 MB / 0.5137 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0005137/0.5234, allocations: 112.6 kB / 0.6959 GB, free: 1.648 MB / 0.5137 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0004595/0.5239, allocations: 140.9 kB / 0.696 GB, free: 1.633 MB / 0.5137 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0005398/0.5244, allocations: 0.5966 MB / 0.6966 GB, free: 1.074 MB / 0.5137 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0009297/0.5254, allocations: 88.62 kB / 0.6967 GB, free: 1.039 MB / 0.5137 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 7.288e-05/0.5254, allocations: 39.16 kB / 0.6967 GB, free: 1.031 MB / 0.5137 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 26 * 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 (79): * Single equations (assignments): 76 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 2 * 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 {(1,3)} Notification: Performance of prepare postOptimizeDAE: time 0.0003068/0.5258, allocations: 224.9 kB / 0.697 GB, free: 0.8164 MB / 0.5137 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0002213/0.526, allocations: 118.2 kB / 0.6971 GB, free: 0.7539 MB / 0.5137 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.002243/0.5282, allocations: 1.06 MB / 0.6981 GB, free: 352 kB / 0.5137 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 2.749e-05/0.5283, allocations: 13.86 kB / 0.6981 GB, free: 348 kB / 0.5137 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 5.711e-06/0.5283, allocations: 0 / 0.6981 GB, free: 348 kB / 0.5137 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.001384/0.5297, allocations: 0.8105 MB / 0.6989 GB, free: 15.92 MB / 0.5294 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.003802/0.5335, allocations: 2.081 MB / 0.7009 GB, free: 14.89 MB / 0.5294 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.479e-05/0.5335, allocations: 4.75 kB / 0.7009 GB, free: 14.89 MB / 0.5294 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0003751/0.5339, allocations: 100.8 kB / 0.701 GB, free: 14.89 MB / 0.5294 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0003224/0.5342, allocations: 71.66 kB / 0.7011 GB, free: 14.86 MB / 0.5294 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 4.886e-05/0.5343, allocations: 20.34 kB / 0.7011 GB, free: 14.85 MB / 0.5294 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.0004511/0.5348, allocations: 0.5921 MB / 0.7017 GB, free: 14.29 MB / 0.5294 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.314e-06/0.5348, allocations: 2.25 kB / 0.7017 GB, free: 14.29 MB / 0.5294 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.002214/0.537, allocations: 1.318 MB / 0.703 GB, free: 13.64 MB / 0.5294 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0005527/0.5375, allocations: 291.3 kB / 0.7033 GB, free: 13.43 MB / 0.5294 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001448/0.5377, allocations: 12.98 kB / 0.7033 GB, free: 13.42 MB / 0.5294 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0007018/0.5384, allocations: 94.41 kB / 0.7034 GB, free: 13.38 MB / 0.5294 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001169/0.5385, allocations: 54.33 kB / 0.7034 GB, free: 13.38 MB / 0.5294 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 7.005e-05/0.5386, allocations: 35.19 kB / 0.7035 GB, free: 13.37 MB / 0.5294 GB Notification: Performance of sorting global known variables: time 0.001003/0.5396, allocations: 0.6735 MB / 0.7041 GB, free: 13.08 MB / 0.5294 GB Notification: Performance of sort global known variables: time 1.7e-07/0.5396, allocations: 0 / 0.7041 GB, free: 13.08 MB / 0.5294 GB Notification: Performance of remove unused functions: time 0.002044/0.5417, allocations: 0.7362 MB / 0.7048 GB, free: 12.91 MB / 0.5294 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 4 * Number of states: 4 (pip.del.x,pip.timDel.x,pip.vol_b.dynBal.U,pip.vol_a.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 (65): * Single equations (assignments): 50 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 14 * 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 {(1,5)} Notification: Performance of Backend phase and start with SimCode phase: time 0.001163/0.5429, allocations: 0.5596 MB / 0.7054 GB, free: 12.66 MB / 0.5294 GB Notification: Performance of simCode: created initialization part: time 0.002128/0.545, allocations: 1.111 MB / 0.7065 GB, free: 12.2 MB / 0.5294 GB Notification: Performance of simCode: created event and clocks part: time 2.635e-06/0.545, allocations: 1.312 kB / 0.7065 GB, free: 12.2 MB / 0.5294 GB Notification: Performance of simCode: created simulation system equations: time 0.0005938/0.5456, allocations: 429.6 kB / 0.7069 GB, free: 12 MB / 0.5294 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.002347/0.548, allocations: 0.6033 MB / 0.7075 GB, free: 11.83 MB / 0.5294 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.00346/0.5514, allocations: 2.637 MB / 0.71 GB, free: 10.14 MB / 0.5294 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0006796/0.5521, allocations: 1.138 MB / 0.7112 GB, free: 9.324 MB / 0.5294 GB Notification: Performance of simCode: alias equations: time 0.0009859/0.5531, allocations: 308.7 kB / 0.7115 GB, free: 9.188 MB / 0.5294 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0002044/0.5533, allocations: 107.7 kB / 0.7116 GB, free: 9.164 MB / 0.5294 GB Notification: Performance of SimCode: time 3.6e-07/0.5533, allocations: 0 / 0.7116 GB, free: 9.164 MB / 0.5294 GB Notification: Performance of Templates: time 0.04556/0.5989, allocations: 27.48 MB / 0.7384 GB, free: 15.07 MB / 0.5606 GB make -j1 -f IDEAS_dev_IDEAS.Fluid.FixedResistances.Validation.PlugFlowPipes.FlowReversal.makefile (rm -f IDEAS_dev_IDEAS.Fluid.FixedResistances.Validation.PlugFlowPipes.FlowReversal.pipe ; mkfifo IDEAS_dev_IDEAS.Fluid.FixedResistances.Validation.PlugFlowPipes.FlowReversal.pipe ; head -c 1048576 < IDEAS_dev_IDEAS.Fluid.FixedResistances.Validation.PlugFlowPipes.FlowReversal.pipe >> ../files/IDEAS_dev_IDEAS.Fluid.FixedResistances.Validation.PlugFlowPipes.FlowReversal.sim & ./IDEAS_dev_IDEAS.Fluid.FixedResistances.Validation.PlugFlowPipes.FlowReversal -abortSlowSimulation -alarm=480 -lv LOG_STATS > IDEAS_dev_IDEAS.Fluid.FixedResistances.Validation.PlugFlowPipes.FlowReversal.pipe 2>&1)