Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_8_Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore.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.FixedResistances.BaseClasses.Validation.PlugFlowCore,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8_Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore") translateModel(Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8_Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001632/0.001632, allocations: 109.4 kB / 15.69 MB, free: 128 kB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.003081/0.003081, allocations: 187.3 kB / 16.62 MB, free: 6.613 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.705/1.705, allocations: 205.1 MB / 222.5 MB, free: 4.578 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 1.882/1.882, allocations: 292.3 MB / 0.549 GB, free: 12.76 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 0.001453/0.001453, allocations: 73.8 kB / 0.6723 GB, free: 26.07 MB / 0.5294 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.2861/0.2875, allocations: 114.6 MB / 0.7841 GB, free: 12.73 MB / 0.6075 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore): time 0.0336/0.3212, allocations: 33.44 MB / 0.8168 GB, free: 11.16 MB / 0.6387 GB Notification: Performance of NFInst.instExpressions: time 0.01313/0.3344, allocations: 9.779 MB / 0.8263 GB, free: 1.355 MB / 0.6387 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.001264/0.3357, allocations: 31.81 kB / 0.8264 GB, free: 1.324 MB / 0.6387 GB Notification: Performance of NFTyping.typeComponents: time 0.001268/0.337, allocations: 405.2 kB / 0.8267 GB, free: 0.9258 MB / 0.6387 GB Notification: Performance of NFTyping.typeBindings: time 0.004403/0.3414, allocations: 1.403 MB / 0.8281 GB, free: 15.52 MB / 0.6544 GB Notification: Performance of NFTyping.typeClassSections: time 0.002984/0.3444, allocations: 0.9524 MB / 0.829 GB, free: 14.57 MB / 0.6544 GB Notification: Performance of NFFlatten.flatten: time 0.003648/0.3481, allocations: 2.017 MB / 0.831 GB, free: 12.54 MB / 0.6544 GB Notification: Performance of NFFlatten.resolveConnections: time 0.001113/0.3492, allocations: 0.6284 MB / 0.8316 GB, free: 11.9 MB / 0.6544 GB Notification: Performance of NFEvalConstants.evaluate: time 0.00238/0.3516, allocations: 0.9649 MB / 0.8326 GB, free: 10.93 MB / 0.6544 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0009623/0.3526, allocations: 0.6185 MB / 0.8332 GB, free: 10.31 MB / 0.6544 GB Notification: Performance of NFPackage.collectConstants: time 0.0001084/0.3527, allocations: 72 kB / 0.8332 GB, free: 10.24 MB / 0.6544 GB Notification: Performance of NFFlatten.collectFunctions: time 0.003026/0.3558, allocations: 1.326 MB / 0.8345 GB, free: 8.91 MB / 0.6544 GB Notification: Performance of NFScalarize.scalarize: time 0.0002965/0.3561, allocations: 183.3 kB / 0.8347 GB, free: 8.73 MB / 0.6544 GB Notification: Performance of NFVerifyModel.verify: time 0.0008284/0.3569, allocations: 437.9 kB / 0.8351 GB, free: 8.301 MB / 0.6544 GB Notification: Performance of NFConvertDAE.convert: time 0.005343/0.3623, allocations: 1.648 MB / 0.8367 GB, free: 6.648 MB / 0.6544 GB Notification: Performance of FrontEnd - DAE generated: time 1.118e-05/0.3623, allocations: 7.984 kB / 0.8367 GB, free: 6.641 MB / 0.6544 GB Notification: Performance of FrontEnd: time 2.806e-06/0.3623, allocations: 3.938 kB / 0.8367 GB, free: 6.637 MB / 0.6544 GB Notification: Performance of Transformations before backend: time 1.415e-05/0.3623, allocations: 0 / 0.8367 GB, free: 6.637 MB / 0.6544 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 111 * Number of variables: 111 Notification: Performance of Generate backend data structure: time 0.00312/0.3655, allocations: 1.23 MB / 0.8379 GB, free: 5.355 MB / 0.6544 GB Notification: Performance of prepare preOptimizeDAE: time 7.259e-05/0.3656, allocations: 8.031 kB / 0.838 GB, free: 5.348 MB / 0.6544 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0002739/0.3658, allocations: 91.91 kB / 0.838 GB, free: 5.258 MB / 0.6544 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001463/0.3673, allocations: 0.6679 MB / 0.8387 GB, free: 4.547 MB / 0.6544 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 3.603e-05/0.3674, allocations: 41 kB / 0.8387 GB, free: 4.508 MB / 0.6544 GB Notification: Performance of preOpt expandDerOperator (simulation): time 9.517e-05/0.3675, allocations: 47.98 kB / 0.8388 GB, free: 4.461 MB / 0.6544 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0008581/0.3683, allocations: 430.4 kB / 0.8392 GB, free: 4.035 MB / 0.6544 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.084e-05/0.3684, allocations: 0 / 0.8392 GB, free: 4.035 MB / 0.6544 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 4.178e-05/0.3684, allocations: 19.94 kB / 0.8392 GB, free: 4.016 MB / 0.6544 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.833e-05/0.3684, allocations: 12 kB / 0.8392 GB, free: 4.004 MB / 0.6544 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.000729/0.3692, allocations: 367.8 kB / 0.8396 GB, free: 3.645 MB / 0.6544 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 0.004023/0.3732, allocations: 2.756 MB / 0.8423 GB, free: 0.6055 MB / 0.6544 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0008435/0.3741, allocations: 383.6 kB / 0.8426 GB, free: 228 kB / 0.6544 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0002844/0.3744, allocations: 153.1 kB / 0.8428 GB, free: 72 kB / 0.6544 GB Notification: Performance of preOpt evalFunc (simulation): time 0.001467/0.3758, allocations: 1.417 MB / 0.8442 GB, free: 14.34 MB / 0.67 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.018e-05/0.3759, allocations: 34.84 kB / 0.8442 GB, free: 14.3 MB / 0.67 GB Notification: Performance of pre-optimization done (n=35): time 1.884e-06/0.3759, allocations: 0 / 0.8442 GB, free: 14.3 MB / 0.67 GB Notification: Performance of matching and sorting (n=35): time 0.001191/0.3771, allocations: 498.7 kB / 0.8447 GB, free: 13.8 MB / 0.67 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.632e-05/0.3771, allocations: 59.34 kB / 0.8447 GB, free: 13.73 MB / 0.67 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.00101/0.3782, allocations: 0.743 MB / 0.8454 GB, free: 12.98 MB / 0.67 GB Notification: Performance of collectPreVariables (initialization): time 3.57e-05/0.3782, allocations: 29.7 kB / 0.8455 GB, free: 12.95 MB / 0.67 GB Notification: Performance of collectInitialEqns (initialization): time 0.0002765/0.3785, allocations: 332.2 kB / 0.8458 GB, free: 12.62 MB / 0.67 GB Notification: Performance of collectInitialBindings (initialization): time 0.0001128/0.3786, allocations: 126.1 kB / 0.8459 GB, free: 12.49 MB / 0.67 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001517/0.3788, allocations: 89.95 kB / 0.846 GB, free: 12.4 MB / 0.67 GB Notification: Performance of setup shared object (initialization): time 0.0001979/0.379, allocations: 321.9 kB / 0.8463 GB, free: 12.08 MB / 0.67 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.000359/0.3793, allocations: 142.3 kB / 0.8464 GB, free: 11.94 MB / 0.67 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0003637/0.3797, allocations: 201.4 kB / 0.8466 GB, free: 11.72 MB / 0.67 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0006427/0.3804, allocations: 334.1 kB / 0.847 GB, free: 11.38 MB / 0.67 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 3.006e-06/0.3804, allocations: 0 / 0.847 GB, free: 11.38 MB / 0.67 GB Notification: Performance of matching and sorting (n=48) (initialization): time 0.0009283/0.3813, allocations: 466 kB / 0.8474 GB, free: 10.91 MB / 0.67 GB Notification: Performance of prepare postOptimizeDAE: time 3.068e-05/0.3814, allocations: 8 kB / 0.8474 GB, free: 10.91 MB / 0.67 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.194e-05/0.3814, allocations: 4 kB / 0.8474 GB, free: 10.9 MB / 0.67 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.675e-05/0.3814, allocations: 3.938 kB / 0.8474 GB, free: 10.9 MB / 0.67 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.000488/0.3819, allocations: 111.8 kB / 0.8475 GB, free: 10.79 MB / 0.67 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.000472/0.3824, allocations: 0.5899 MB / 0.8481 GB, free: 10.18 MB / 0.67 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0004541/0.3828, allocations: 59.52 kB / 0.8482 GB, free: 10.12 MB / 0.67 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 5.775e-05/0.3829, allocations: 27.92 kB / 0.8482 GB, free: 10.09 MB / 0.67 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0004596/0.3834, allocations: 273.5 kB / 0.8484 GB, free: 9.82 MB / 0.67 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.000454/0.3839, allocations: 197.6 kB / 0.8486 GB, free: 9.609 MB / 0.67 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.000607/0.3845, allocations: 341.1 kB / 0.849 GB, free: 9.258 MB / 0.67 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 1.824e-06/0.3845, allocations: 0 / 0.849 GB, free: 9.258 MB / 0.67 GB Notification: Performance of matching and sorting (n=48) (initialization_lambda0): time 0.000886/0.3854, allocations: 472 kB / 0.8494 GB, free: 8.789 MB / 0.67 GB Notification: Performance of prepare postOptimizeDAE: time 1.269e-05/0.3854, allocations: 4 kB / 0.8494 GB, free: 8.785 MB / 0.67 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.264e-05/0.3854, allocations: 4 kB / 0.8494 GB, free: 8.781 MB / 0.67 GB Notification: Performance of postOpt tearingSystem (initialization): time 7.334e-06/0.3854, allocations: 4 kB / 0.8494 GB, free: 8.777 MB / 0.67 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0003269/0.3858, allocations: 91.81 kB / 0.8495 GB, free: 8.688 MB / 0.67 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 6.783e-06/0.3858, allocations: 4.156 kB / 0.8495 GB, free: 8.684 MB / 0.67 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0003807/0.3862, allocations: 39.77 kB / 0.8495 GB, free: 8.645 MB / 0.67 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.585e-05/0.3862, allocations: 27.92 kB / 0.8496 GB, free: 8.617 MB / 0.67 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 6 * 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 (46): * Single equations (assignments): 43 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 2 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 1 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details (not torn): * Constant Jacobian (size): 0 systems * Linear Jacobian (size,density): 0 systems * Non-linear Jacobian (size): 1 system {1} * Without analytic Jacobian (size): 0 systems Notification: Performance of prepare postOptimizeDAE: time 0.0001724/0.3864, allocations: 192.2 kB / 0.8498 GB, free: 8.422 MB / 0.67 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001899/0.3866, allocations: 83.05 kB / 0.8498 GB, free: 8.34 MB / 0.67 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.001559/0.3882, allocations: 0.8149 MB / 0.8506 GB, free: 7.539 MB / 0.67 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.937e-05/0.3882, allocations: 8 kB / 0.8506 GB, free: 7.531 MB / 0.67 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 7.244e-06/0.3882, allocations: 96 / 0.8506 GB, free: 7.531 MB / 0.67 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 1.08e-05/0.3882, allocations: 7.969 kB / 0.8506 GB, free: 7.523 MB / 0.67 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.002329/0.3906, allocations: 1.454 MB / 0.8521 GB, free: 6.004 MB / 0.67 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.359e-05/0.3906, allocations: 8.031 kB / 0.8521 GB, free: 5.996 MB / 0.67 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0003529/0.3909, allocations: 79.89 kB / 0.8521 GB, free: 5.918 MB / 0.67 GB Notification: Performance of postOpt tearingSystem (simulation): time 8.445e-06/0.391, allocations: 4 kB / 0.8522 GB, free: 5.914 MB / 0.67 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 4.11e-05/0.391, allocations: 19.98 kB / 0.8522 GB, free: 5.895 MB / 0.67 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.0003849/0.3914, allocations: 0.5899 MB / 0.8527 GB, free: 5.281 MB / 0.67 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.044e-06/0.3914, allocations: 0 / 0.8527 GB, free: 5.281 MB / 0.67 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.001505/0.3929, allocations: 0.9886 MB / 0.8537 GB, free: 4.258 MB / 0.67 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0003555/0.3933, allocations: 223.9 kB / 0.8539 GB, free: 4.02 MB / 0.67 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.000101/0.3934, allocations: 12 kB / 0.8539 GB, free: 4.008 MB / 0.67 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.000363/0.3938, allocations: 27.97 kB / 0.854 GB, free: 3.98 MB / 0.67 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001073/0.3939, allocations: 44.33 kB / 0.854 GB, free: 3.938 MB / 0.67 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 4.341e-05/0.3939, allocations: 19.98 kB / 0.854 GB, free: 3.918 MB / 0.67 GB Notification: Performance of sorting global known variables: time 0.000759/0.3947, allocations: 0.5224 MB / 0.8545 GB, free: 3.398 MB / 0.67 GB Notification: Performance of sort global known variables: time 2.545e-06/0.3947, allocations: 0 / 0.8545 GB, free: 3.398 MB / 0.67 GB Notification: Performance of remove unused functions: time 0.001249/0.396, allocations: 463.4 kB / 0.855 GB, free: 2.945 MB / 0.67 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,senTemOut.T,senTemIn.T) * 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 (52): * Single equations (assignments): 37 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 14 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 1 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details (not torn): * Constant Jacobian (size): 0 systems * Linear Jacobian (size,density): 0 systems * Non-linear Jacobian (size): 1 system {1} * Without analytic Jacobian (size): 0 systems Notification: Performance of Backend phase and start with SimCode phase: time 0.0009772/0.397, allocations: 472.7 kB / 0.8554 GB, free: 2.484 MB / 0.67 GB Notification: Performance of simCode: created initialization part: time 0.00155/0.3985, allocations: 0.7295 MB / 0.8561 GB, free: 1.734 MB / 0.67 GB Notification: Performance of simCode: created event and clocks part: time 4.378e-06/0.3985, allocations: 7.938 kB / 0.8561 GB, free: 1.727 MB / 0.67 GB Notification: Performance of simCode: created simulation system equations: time 0.0005654/0.3991, allocations: 345.8 kB / 0.8565 GB, free: 1.371 MB / 0.67 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001748/0.4009, allocations: 406.4 kB / 0.8569 GB, free: 0.9883 MB / 0.67 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.002436/0.4033, allocations: 1.465 MB / 0.8583 GB, free: 15.49 MB / 0.6856 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0006215/0.4039, allocations: 0.9392 MB / 0.8592 GB, free: 14.52 MB / 0.6856 GB Notification: Performance of simCode: alias equations: time 0.000666/0.4046, allocations: 219.4 kB / 0.8594 GB, free: 14.32 MB / 0.6856 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001685/0.4048, allocations: 75.41 kB / 0.8595 GB, free: 14.25 MB / 0.6856 GB Notification: Performance of SimCode: time 8.22e-07/0.4048, allocations: 0 / 0.8595 GB, free: 14.25 MB / 0.6856 GB Notification: Performance of Templates: time 0.0347/0.4395, allocations: 19.73 MB / 0.8788 GB, free: 10.81 MB / 0.7012 GB make -j1 -f Buildings_8_Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore.makefile (rm -f Buildings_8_Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore.pipe ; mkfifo Buildings_8_Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore.pipe ; head -c 1048576 < Buildings_8_Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore.pipe >> ../files/Buildings_8_Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore.sim & ./Buildings_8_Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_8_Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore.pipe 2>&1)