Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_10_Buildings.Fluid.MixingVolumes.Validation.MixingVolumeInitialization.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: translateModel(Buildings.Fluid.MixingVolumes.Validation.MixingVolumeInitialization,tolerance=1e-06,outputFormat="mat",numberOfIntervals=5000,variableFilter="time|vol1.T_start|vol1.T|vol1.ports.1..h_outflow|vol1.ports.2..h_outflow|pipe1.port_b.h_outflow",fileNamePrefix="Buildings_10_Buildings.Fluid.MixingVolumes.Validation.MixingVolumeInitialization") translateModel(Buildings.Fluid.MixingVolumes.Validation.MixingVolumeInitialization,tolerance=1e-06,outputFormat="mat",numberOfIntervals=5000,variableFilter="time|vol1.T_start|vol1.T|vol1.ports.1..h_outflow|vol1.ports.2..h_outflow|pipe1.port_b.h_outflow",fileNamePrefix="Buildings_10_Buildings.Fluid.MixingVolumes.Validation.MixingVolumeInitialization") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001381/0.001381, allocations: 108 kB / 15.61 MB, free: 152 kB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001626/0.001626, allocations: 193 kB / 16.53 MB, free: 6.664 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.419/1.419, allocations: 222.9 MB / 240.2 MB, free: 4.371 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 2.681/2.681, allocations: 437 MB / 0.7103 GB, free: 5.117 MB / 0.5606 GB Notification: Performance of FrontEnd - loaded program: time 0.001546/0.001546, allocations: 75.88 kB / 0.8692 GB, free: 4.664 MB / 0.7169 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.7058/0.7074, allocations: 151.6 MB / 1.017 GB, free: 2.668 MB / 0.7637 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.MixingVolumes.Validation.MixingVolumeInitialization): time 0.198/0.9055, allocations: 187.9 MB / 1.201 GB, free: 6.086 MB / 0.9512 GB Notification: Performance of NFInst.instExpressions: time 0.01549/0.921, allocations: 10.75 MB / 1.211 GB, free: 11.3 MB / 0.9669 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.001339/0.9224, allocations: 43.69 kB / 1.211 GB, free: 11.26 MB / 0.9669 GB Notification: Performance of NFTyping.typeComponents: time 0.001292/0.9237, allocations: 493 kB / 1.212 GB, free: 10.78 MB / 0.9669 GB Notification: Performance of NFTyping.typeBindings: time 0.006387/0.9301, allocations: 2.587 MB / 1.214 GB, free: 8.184 MB / 0.9669 GB Notification: Performance of NFTyping.typeClassSections: time 0.006071/0.9362, allocations: 2.458 MB / 1.217 GB, free: 5.73 MB / 0.9669 GB Notification: Performance of NFFlatten.flatten: time 0.003452/0.9397, allocations: 2.76 MB / 1.219 GB, free: 2.965 MB / 0.9669 GB Notification: Performance of NFFlatten.resolveConnections: time 0.001103/0.9408, allocations: 0.7839 MB / 1.22 GB, free: 2.168 MB / 0.9669 GB Notification: Performance of NFEvalConstants.evaluate: time 0.001608/0.9424, allocations: 0.9925 MB / 1.221 GB, free: 1.172 MB / 0.9669 GB Notification: Performance of NFSimplifyModel.simplify: time 0.001764/0.9442, allocations: 1.061 MB / 1.222 GB, free: 112 kB / 0.9669 GB Notification: Performance of NFPackage.collectConstants: time 0.0001575/0.9443, allocations: 96 kB / 1.222 GB, free: 16 kB / 0.9669 GB Notification: Performance of NFFlatten.collectFunctions: time 0.005922/0.9503, allocations: 3.001 MB / 1.225 GB, free: 13.01 MB / 0.9825 GB Notification: Performance of NFScalarize.scalarize: time 0.0004724/0.9508, allocations: 438.8 kB / 1.226 GB, free: 12.58 MB / 0.9825 GB Notification: Performance of NFVerifyModel.verify: time 0.0007022/0.9515, allocations: 0.5794 MB / 1.226 GB, free: 12 MB / 0.9825 GB Notification: Performance of NFConvertDAE.convert: time 0.005596/0.9571, allocations: 2.926 MB / 1.229 GB, free: 9.062 MB / 0.9825 GB Notification: Performance of FrontEnd - DAE generated: time 6.543e-06/0.9571, allocations: 0 / 1.229 GB, free: 9.062 MB / 0.9825 GB Notification: Performance of FrontEnd: time 2.375e-06/0.9571, allocations: 0 / 1.229 GB, free: 9.062 MB / 0.9825 GB Notification: Performance of Transformations before backend: time 3.071e-05/0.9572, allocations: 0 / 1.229 GB, free: 9.062 MB / 0.9825 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 173 * Number of variables: 173 Notification: Performance of Generate backend data structure: time 0.003645/0.9608, allocations: 1.67 MB / 1.231 GB, free: 7.336 MB / 0.9825 GB Notification: Performance of prepare preOptimizeDAE: time 4.736e-05/0.9609, allocations: 15.98 kB / 1.231 GB, free: 7.32 MB / 0.9825 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.001757/0.9626, allocations: 298.3 kB / 1.231 GB, free: 7.027 MB / 0.9825 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001191/0.9638, allocations: 0.7843 MB / 1.232 GB, free: 6.203 MB / 0.9825 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 4.899e-05/0.9639, allocations: 49.3 kB / 1.232 GB, free: 6.156 MB / 0.9825 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001217/0.964, allocations: 71.89 kB / 1.232 GB, free: 6.086 MB / 0.9825 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001474/0.9655, allocations: 0.9961 MB / 1.233 GB, free: 5.07 MB / 0.9825 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.092e-05/0.9655, allocations: 0 / 1.233 GB, free: 5.07 MB / 0.9825 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 7.706e-05/0.9656, allocations: 23.98 kB / 1.233 GB, free: 5.047 MB / 0.9825 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 9.193e-05/0.9657, allocations: 73.95 kB / 1.233 GB, free: 4.977 MB / 0.9825 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001524/0.9673, allocations: 1.019 MB / 1.234 GB, free: 3.957 MB / 0.9825 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 0.005675/0.9729, allocations: 3.582 MB / 1.237 GB, free: 148 kB / 0.9825 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001041/0.974, allocations: 0.6651 MB / 1.238 GB, free: 15.46 MB / 0.9981 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0004864/0.9745, allocations: 375.8 kB / 1.238 GB, free: 15.1 MB / 0.9981 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0002486/0.9747, allocations: 194.8 kB / 1.239 GB, free: 14.87 MB / 0.9981 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.784e-05/0.9748, allocations: 39.12 kB / 1.239 GB, free: 14.82 MB / 0.9981 GB Notification: Performance of pre-optimization done (n=62): time 3.266e-06/0.9748, allocations: 4 kB / 1.239 GB, free: 14.82 MB / 0.9981 GB Notification: Performance of matching and sorting (n=62): time 0.001863/0.9767, allocations: 1.021 MB / 1.24 GB, free: 13.79 MB / 0.9981 GB Notification: Performance of inlineWhenForInitialization (initialization): time 6.664e-05/0.9767, allocations: 107.4 kB / 1.24 GB, free: 13.66 MB / 0.9981 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0009185/0.9777, allocations: 0.8058 MB / 1.24 GB, free: 12.85 MB / 0.9981 GB Notification: Performance of collectPreVariables (initialization): time 5.512e-05/0.9777, allocations: 37.7 kB / 1.241 GB, free: 12.8 MB / 0.9981 GB Notification: Performance of collectInitialEqns (initialization): time 0.0002909/0.978, allocations: 428 kB / 1.241 GB, free: 12.38 MB / 0.9981 GB Notification: Performance of collectInitialBindings (initialization): time 0.000196/0.9782, allocations: 220.8 kB / 1.241 GB, free: 12.16 MB / 0.9981 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0002458/0.9785, allocations: 146.6 kB / 1.241 GB, free: 12.02 MB / 0.9981 GB Notification: Performance of setup shared object (initialization): time 0.0001187/0.9786, allocations: 334 kB / 1.242 GB, free: 11.68 MB / 0.9981 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0005229/0.9791, allocations: 340.7 kB / 1.242 GB, free: 11.35 MB / 0.9981 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0006325/0.9798, allocations: 464.7 kB / 1.242 GB, free: 10.86 MB / 0.9981 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001081/0.9809, allocations: 0.7665 MB / 1.243 GB, free: 10.06 MB / 0.9981 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 3.507e-06/0.9809, allocations: 0 / 1.243 GB, free: 10.06 MB / 0.9981 GB Notification: Performance of matching and sorting (n=88) (initialization): time 0.001446/0.9823, allocations: 0.9336 MB / 1.244 GB, free: 9.117 MB / 0.9981 GB Notification: Performance of prepare postOptimizeDAE: time 2.026e-05/0.9824, allocations: 8 kB / 1.244 GB, free: 9.109 MB / 0.9981 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.026e-05/0.9824, allocations: 4 kB / 1.244 GB, free: 9.105 MB / 0.9981 GB Notification: Performance of postOpt tearingSystem (initialization): time 2.124e-05/0.9824, allocations: 4 kB / 1.244 GB, free: 9.102 MB / 0.9981 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0006907/0.9831, allocations: 155.9 kB / 1.244 GB, free: 8.949 MB / 0.9981 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.528e-05/0.9831, allocations: 7.938 kB / 1.244 GB, free: 8.941 MB / 0.9981 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0007617/0.9839, allocations: 79.2 kB / 1.244 GB, free: 8.863 MB / 0.9981 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 6.381e-05/0.984, allocations: 31.98 kB / 1.244 GB, free: 8.832 MB / 0.9981 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0007877/0.9848, allocations: 0.537 MB / 1.245 GB, free: 8.289 MB / 0.9981 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0005944/0.9854, allocations: 450.5 kB / 1.245 GB, free: 7.805 MB / 0.9981 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.001012/0.9864, allocations: 0.733 MB / 1.246 GB, free: 7.031 MB / 0.9981 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 2.104e-06/0.9864, allocations: 4 kB / 1.246 GB, free: 7.027 MB / 0.9981 GB Notification: Performance of matching and sorting (n=88) (initialization_lambda0): time 0.001381/0.9878, allocations: 0.8942 MB / 1.247 GB, free: 6.125 MB / 0.9981 GB Notification: Performance of prepare postOptimizeDAE: time 1.583e-05/0.9878, allocations: 13.19 kB / 1.247 GB, free: 6.113 MB / 0.9981 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 3.667e-06/0.9878, allocations: 3.938 kB / 1.247 GB, free: 6.109 MB / 0.9981 GB Notification: Performance of postOpt tearingSystem (initialization): time 9.438e-06/0.9878, allocations: 8 kB / 1.247 GB, free: 6.102 MB / 0.9981 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0006615/0.9885, allocations: 143.8 kB / 1.247 GB, free: 5.961 MB / 0.9981 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.141e-05/0.9885, allocations: 8.219 kB / 1.247 GB, free: 5.953 MB / 0.9981 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0007341/0.9893, allocations: 67.5 kB / 1.247 GB, free: 5.887 MB / 0.9981 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 5.688e-05/0.9893, allocations: 28 kB / 1.247 GB, free: 5.859 MB / 0.9981 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 10 * 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 (88): * Single equations (assignments): 88 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of prepare postOptimizeDAE: time 0.0002401/0.9896, allocations: 220.1 kB / 1.247 GB, free: 5.637 MB / 0.9981 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.000169/0.9898, allocations: 94.86 kB / 1.247 GB, free: 5.543 MB / 0.9981 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.001392/0.9912, allocations: 0.7989 MB / 1.248 GB, free: 4.738 MB / 0.9981 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.119e-05/0.9912, allocations: 11.94 kB / 1.248 GB, free: 4.727 MB / 0.9981 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 6.261e-06/0.9912, allocations: 4 kB / 1.248 GB, free: 4.723 MB / 0.9981 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.00107/0.9923, allocations: 0.7439 MB / 1.249 GB, free: 3.949 MB / 0.9981 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.003115/0.9954, allocations: 2.097 MB / 1.251 GB, free: 1.75 MB / 0.9981 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 8.366e-06/0.9954, allocations: 7.938 kB / 1.251 GB, free: 1.742 MB / 0.9981 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0006733/0.9961, allocations: 128.2 kB / 1.251 GB, free: 1.617 MB / 0.9981 GB Notification: Performance of postOpt tearingSystem (simulation): time 9.348e-06/0.9961, allocations: 12 kB / 1.251 GB, free: 1.605 MB / 0.9981 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 4.85e-05/0.9962, allocations: 16 kB / 1.251 GB, free: 1.59 MB / 0.9981 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 1.024e-05/0.9962, allocations: 8 kB / 1.251 GB, free: 1.582 MB / 0.9981 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 6.041e-06/0.9962, allocations: 7.922 kB / 1.251 GB, free: 1.574 MB / 0.9981 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.00183/0.998, allocations: 1.36 MB / 1.252 GB, free: 156 kB / 0.9981 GB Notification: Performance of postOpt removeConstants (simulation): time 0.5949/1.593, allocations: 248.1 kB / 1.253 GB, free: 233.3 MB / 0.9981 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0002714/1.593, allocations: 17.28 kB / 1.253 GB, free: 233.3 MB / 0.9981 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0006881/1.594, allocations: 22.47 kB / 1.253 GB, free: 233.3 MB / 0.9981 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001258/1.594, allocations: 43.83 kB / 1.253 GB, free: 233.3 MB / 0.9981 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 5.924e-05/1.594, allocations: 31.39 kB / 1.253 GB, free: 233.3 MB / 0.9981 GB Notification: Performance of sorting global known variables: time 0.0009157/1.595, allocations: 0.5594 MB / 1.253 GB, free: 233.2 MB / 0.9981 GB Notification: Performance of sort global known variables: time 3.01e-07/1.595, allocations: 3.906 kB / 1.253 GB, free: 233.2 MB / 0.9981 GB Notification: Performance of remove unused functions: time 0.002033/1.597, allocations: 0.7426 MB / 1.254 GB, free: 233.2 MB / 0.9981 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 15 * Number of states: 3 (vol1.dynBal.medium.Xi[1],vol1.dynBal.U,vol1.dynBal.m) * 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 (64): * Single equations (assignments): 64 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of Backend phase and start with SimCode phase: time 0.001291/1.598, allocations: 0.5448 MB / 1.255 GB, free: 233.1 MB / 0.9981 GB Notification: Performance of simCode: created initialization part: time 0.002661/1.601, allocations: 1.313 MB / 1.256 GB, free: 232.8 MB / 0.9981 GB Notification: Performance of simCode: created event and clocks part: time 7.103e-06/1.601, allocations: 1.594 kB / 1.256 GB, free: 232.8 MB / 0.9981 GB Notification: Performance of simCode: created simulation system equations: time 0.0006185/1.602, allocations: 375.3 kB / 1.256 GB, free: 232.7 MB / 0.9981 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.002613/1.604, allocations: 0.5324 MB / 1.257 GB, free: 232.6 MB / 0.9981 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.003199/1.608, allocations: 1.932 MB / 1.259 GB, free: 231.6 MB / 0.9981 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0008223/1.608, allocations: 1.077 MB / 1.26 GB, free: 230.9 MB / 0.9981 GB Notification: Performance of simCode: alias equations: time 0.001544/1.61, allocations: 417.6 kB / 1.26 GB, free: 230.8 MB / 0.9981 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0002594/1.61, allocations: 81 kB / 1.26 GB, free: 230.8 MB / 0.9981 GB Notification: Performance of SimCode: time 6.11e-07/1.61, allocations: 0 / 1.26 GB, free: 230.8 MB / 0.9981 GB Notification: Performance of Templates: time 0.04018/1.65, allocations: 22.84 MB / 1.283 GB, free: 222.3 MB / 0.9981 GB make -j1 -f Buildings_10_Buildings.Fluid.MixingVolumes.Validation.MixingVolumeInitialization.makefile (rm -f Buildings_10_Buildings.Fluid.MixingVolumes.Validation.MixingVolumeInitialization.pipe ; mkfifo Buildings_10_Buildings.Fluid.MixingVolumes.Validation.MixingVolumeInitialization.pipe ; head -c 1048576 < Buildings_10_Buildings.Fluid.MixingVolumes.Validation.MixingVolumeInitialization.pipe >> ../files/Buildings_10_Buildings.Fluid.MixingVolumes.Validation.MixingVolumeInitialization.sim & ./Buildings_10_Buildings.Fluid.MixingVolumes.Validation.MixingVolumeInitialization -abortSlowSimulation -alarm=480 -emit_protected -lv LOG_STATS > Buildings_10_Buildings.Fluid.MixingVolumes.Validation.MixingVolumeInitialization.pipe 2>&1) diffSimulationResults("Buildings_10_Buildings.Fluid.MixingVolumes.Validation.MixingVolumeInitialization_res.mat","/mnt/ReferenceFiles/Buildings/csv/maint_10.0.x/Buildings_Fluid_MixingVolumes_Validation_MixingVolumeInitialization.csv","/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/Buildings_10_Buildings.Fluid.MixingVolumes.Validation.MixingVolumeInitialization.diff",relTol=0.003,relTolDiffMinMax=0.003,rangeDelta=0.001) Reference file matches