Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_9_Buildings.Fluid.Interfaces.Examples.ReverseFlowHumidifier.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 9.1.3-maint.9.1.x/package.mo", uses=false) Using package Buildings with version 9.1.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 9.1.3-maint.9.1.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.Interfaces.Examples.ReverseFlowHumidifier,fileNamePrefix="Buildings_9_Buildings_Fluid_Interfaces_Examples_ReverseFlowHumidifier",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(Buildings.Fluid.Interfaces.Examples.ReverseFlowHumidifier,fileNamePrefix="Buildings_9_Buildings_Fluid_Interfaces_Examples_ReverseFlowHumidifier",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 0.00775/0.00775, allocations: 99.81 kB / 15.73 MB, free: 6.055 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001525/0.001526, allocations: 192.3 kB / 16.67 MB, free: 5.969 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.373/1.373, allocations: 222.9 MB / 240.4 MB, free: 15.1 MB / 206.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 9.1.3-maint.9.1.x/package.mo): time 2.245/2.245, allocations: 390.3 MB / 0.6648 GB, free: 0.6602 MB / 0.5294 GB Notification: Performance of FrontEnd - loaded program: time 0.001351/0.001351, allocations: 67.89 kB / 0.9504 GB, free: 8.184 MB / 0.7325 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.8082/0.8096, allocations: 140.4 MB / 1.087 GB, free: 5.301 MB / 0.8575 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.Interfaces.Examples.ReverseFlowHumidifier): time 0.2944/1.104, allocations: 274.6 MB / 1.356 GB, free: 10.82 MB / 1.092 GB Notification: Performance of NFInst.instExpressions: time 0.02722/1.131, allocations: 17.38 MB / 1.373 GB, free: 9.383 MB / 1.107 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.002616/1.134, allocations: 71.62 kB / 1.373 GB, free: 9.312 MB / 1.107 GB Notification: Performance of NFTyping.typeComponents: time 0.00343/1.137, allocations: 1.2 MB / 1.374 GB, free: 8.105 MB / 1.107 GB Notification: Performance of NFTyping.typeBindings: time 0.008348/1.146, allocations: 3.228 MB / 1.377 GB, free: 4.867 MB / 1.107 GB Notification: Performance of NFTyping.typeClassSections: time 0.005994/1.152, allocations: 2.227 MB / 1.379 GB, free: 2.645 MB / 1.107 GB Notification: Performance of NFFlatten.flatten: time 0.007377/1.159, allocations: 4.857 MB / 1.384 GB, free: 13.78 MB / 1.123 GB Notification: Performance of NFFlatten.resolveConnections: time 0.003173/1.162, allocations: 1.763 MB / 1.386 GB, free: 11.98 MB / 1.123 GB Notification: Performance of NFEvalConstants.evaluate: time 0.007421/1.17, allocations: 2.502 MB / 1.388 GB, free: 9.48 MB / 1.123 GB Notification: Performance of NFSimplifyModel.simplify: time 0.00394/1.174, allocations: 1.538 MB / 1.39 GB, free: 7.949 MB / 1.123 GB Notification: Performance of NFPackage.collectConstants: time 0.001075/1.175, allocations: 192 kB / 1.39 GB, free: 7.762 MB / 1.123 GB Notification: Performance of NFFlatten.collectFunctions: time 0.009324/1.184, allocations: 3.024 MB / 1.393 GB, free: 4.73 MB / 1.123 GB Notification: Performance of NFScalarize.scalarize: time 0.001878/1.186, allocations: 0.7284 MB / 1.393 GB, free: 4 MB / 1.123 GB Notification: Performance of NFVerifyModel.verify: time 0.003122/1.189, allocations: 1.116 MB / 1.395 GB, free: 2.879 MB / 1.123 GB Notification: Performance of NFConvertDAE.convert: time 0.009465/1.199, allocations: 3.843 MB / 1.398 GB, free: 15.02 MB / 1.139 GB Notification: Performance of FrontEnd - DAE generated: time 7.644e-06/1.199, allocations: 0 / 1.398 GB, free: 15.02 MB / 1.139 GB Notification: Performance of FrontEnd: time 2.395e-06/1.199, allocations: 0 / 1.398 GB, free: 15.02 MB / 1.139 GB Notification: Performance of Transformations before backend: time 0.0001294/1.199, allocations: 0 / 1.398 GB, free: 15.02 MB / 1.139 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 324 * Number of variables: 324 Notification: Performance of Generate backend data structure: time 0.006401/1.205, allocations: 2.502 MB / 1.401 GB, free: 12.45 MB / 1.139 GB Notification: Performance of prepare preOptimizeDAE: time 4.909e-05/1.205, allocations: 8.031 kB / 1.401 GB, free: 12.44 MB / 1.139 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0002921/1.206, allocations: 190.1 kB / 1.401 GB, free: 12.25 MB / 1.139 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.004709/1.21, allocations: 0.6544 MB / 1.402 GB, free: 11.59 MB / 1.139 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.003113/1.214, allocations: 1.413 MB / 1.403 GB, free: 10.12 MB / 1.139 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0001319/1.214, allocations: 106.5 kB / 1.403 GB, free: 10.02 MB / 1.139 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0002535/1.214, allocations: 144 kB / 1.403 GB, free: 9.875 MB / 1.139 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.002664/1.217, allocations: 1.569 MB / 1.405 GB, free: 8.238 MB / 1.139 GB Notification: Performance of preOpt findStateOrder (simulation): time 3.602e-05/1.217, allocations: 4 kB / 1.405 GB, free: 8.234 MB / 1.139 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001403/1.217, allocations: 63.88 kB / 1.405 GB, free: 8.172 MB / 1.139 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 5.92e-05/1.217, allocations: 46.45 kB / 1.405 GB, free: 8.125 MB / 1.139 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.002316/1.219, allocations: 1.266 MB / 1.406 GB, free: 6.852 MB / 1.139 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 0.01085/1.23, allocations: 7.224 MB / 1.413 GB, free: 15.06 MB / 1.154 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001204/1.231, allocations: 0.6422 MB / 1.414 GB, free: 14.41 MB / 1.154 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0005478/1.232, allocations: 366.4 kB / 1.414 GB, free: 14.05 MB / 1.154 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0002098/1.232, allocations: 101.7 kB / 1.414 GB, free: 13.94 MB / 1.154 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 4.803e-05/1.232, allocations: 51.11 kB / 1.414 GB, free: 13.88 MB / 1.154 GB Notification: Performance of preOpt simplifyInStream (simulation): time 0.0007038/1.233, allocations: 111.3 kB / 1.414 GB, free: 13.77 MB / 1.154 GB Notification: Performance of pre-optimization done (n=67): time 6.743e-06/1.233, allocations: 0 / 1.414 GB, free: 13.77 MB / 1.154 GB Notification: Performance of matching and sorting (n=67): time 0.00217/1.235, allocations: 1.021 MB / 1.415 GB, free: 12.74 MB / 1.154 GB Notification: Performance of inlineWhenForInitialization (initialization): time 5.098e-05/1.235, allocations: 59.97 kB / 1.415 GB, free: 12.67 MB / 1.154 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.002063/1.237, allocations: 1.339 MB / 1.417 GB, free: 11.32 MB / 1.154 GB Notification: Performance of collectPreVariables (initialization): time 0.0001499/1.237, allocations: 45.7 kB / 1.417 GB, free: 11.27 MB / 1.154 GB Notification: Performance of collectInitialEqns (initialization): time 0.0007105/1.238, allocations: 0.7908 MB / 1.418 GB, free: 10.47 MB / 1.154 GB Notification: Performance of collectInitialBindings (initialization): time 0.0003129/1.239, allocations: 245.9 kB / 1.418 GB, free: 10.23 MB / 1.154 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0003762/1.239, allocations: 202.5 kB / 1.418 GB, free: 10.02 MB / 1.154 GB Notification: Performance of setup shared object (initialization): time 0.0001692/1.239, allocations: 345.9 kB / 1.418 GB, free: 9.68 MB / 1.154 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0005924/1.24, allocations: 356.7 kB / 1.419 GB, free: 9.328 MB / 1.154 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0009814/1.241, allocations: 0.6868 MB / 1.419 GB, free: 8.5 MB / 1.154 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001329/1.242, allocations: 0.9486 MB / 1.42 GB, free: 7.461 MB / 1.154 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 9.708e-06/1.242, allocations: 8 kB / 1.42 GB, free: 7.453 MB / 1.154 GB Notification: Performance of matching and sorting (n=123) (initialization): time 0.001996/1.244, allocations: 1.16 MB / 1.421 GB, free: 6.285 MB / 1.154 GB Notification: Performance of prepare postOptimizeDAE: time 2.123e-05/1.244, allocations: 8 kB / 1.421 GB, free: 6.277 MB / 1.154 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.543e-05/1.244, allocations: 8 kB / 1.421 GB, free: 6.27 MB / 1.154 GB Notification: Performance of postOpt tearingSystem (initialization): time 2.794e-05/1.244, allocations: 12 kB / 1.421 GB, free: 6.258 MB / 1.154 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0008944/1.245, allocations: 211.7 kB / 1.422 GB, free: 6.051 MB / 1.154 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 2.657e-05/1.245, allocations: 15.98 kB / 1.422 GB, free: 6.035 MB / 1.154 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001364/1.246, allocations: 49.5 kB / 1.422 GB, free: 5.988 MB / 1.154 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 8.965e-05/1.247, allocations: 40 kB / 1.422 GB, free: 5.949 MB / 1.154 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.001183/1.248, allocations: 0.6931 MB / 1.422 GB, free: 5.254 MB / 1.154 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0008427/1.249, allocations: 0.6752 MB / 1.423 GB, free: 4.438 MB / 1.154 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.001276/1.25, allocations: 0.9527 MB / 1.424 GB, free: 3.398 MB / 1.154 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 6.773e-06/1.25, allocations: 4 kB / 1.424 GB, free: 3.395 MB / 1.154 GB Notification: Performance of matching and sorting (n=123) (initialization_lambda0): time 0.002098/1.252, allocations: 1.156 MB / 1.425 GB, free: 2.227 MB / 1.154 GB Notification: Performance of prepare postOptimizeDAE: time 1.748e-05/1.252, allocations: 10.19 kB / 1.425 GB, free: 2.219 MB / 1.154 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 8.426e-06/1.252, allocations: 4.875 kB / 1.425 GB, free: 2.215 MB / 1.154 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.694e-05/1.252, allocations: 12 kB / 1.425 GB, free: 2.203 MB / 1.154 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0008729/1.253, allocations: 223.6 kB / 1.425 GB, free: 1.984 MB / 1.154 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 2.449e-05/1.253, allocations: 19.92 kB / 1.425 GB, free: 1.965 MB / 1.154 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001477/1.254, allocations: 51.91 kB / 1.425 GB, free: 1.914 MB / 1.154 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 8.054e-05/1.255, allocations: 43.98 kB / 1.425 GB, free: 1.871 MB / 1.154 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 30 * 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 (121): * Single equations (assignments): 119 * Array equations: 2 * 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 0.0003084/1.255, allocations: 240 kB / 1.426 GB, free: 1.629 MB / 1.154 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.000367/1.255, allocations: 163 kB / 1.426 GB, free: 1.469 MB / 1.154 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.001509/1.257, allocations: 0.828 MB / 1.427 GB, free: 0.625 MB / 1.154 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 8.466e-06/1.257, allocations: 8 kB / 1.427 GB, free: 0.6172 MB / 1.154 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 6.412e-06/1.257, allocations: 0 / 1.427 GB, free: 0.6172 MB / 1.154 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.00105/1.258, allocations: 0.7824 MB / 1.427 GB, free: 15.79 MB / 1.17 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.003816/1.262, allocations: 2.306 MB / 1.43 GB, free: 13.4 MB / 1.17 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 7.033e-06/1.262, allocations: 4 kB / 1.43 GB, free: 13.39 MB / 1.17 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0008178/1.263, allocations: 163.8 kB / 1.43 GB, free: 13.23 MB / 1.17 GB Notification: Performance of postOpt tearingSystem (simulation): time 1.602e-05/1.263, allocations: 12.12 kB / 1.43 GB, free: 13.22 MB / 1.17 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 8.001e-05/1.263, allocations: 20 kB / 1.43 GB, free: 13.2 MB / 1.17 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 8.957e-06/1.263, allocations: 4 kB / 1.43 GB, free: 13.2 MB / 1.17 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 5.36e-06/1.263, allocations: 7.938 kB / 1.43 GB, free: 13.19 MB / 1.17 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.001992/1.265, allocations: 1.254 MB / 1.431 GB, free: 11.9 MB / 1.17 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0007481/1.265, allocations: 332 kB / 1.431 GB, free: 11.56 MB / 1.17 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0002829/1.266, allocations: 23.94 kB / 1.431 GB, free: 11.54 MB / 1.17 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.001006/1.267, allocations: 39.38 kB / 1.431 GB, free: 11.5 MB / 1.17 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 8.419e-05/1.267, allocations: 48.44 kB / 1.432 GB, free: 11.45 MB / 1.17 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 9.544e-05/1.267, allocations: 35.98 kB / 1.432 GB, free: 11.42 MB / 1.17 GB Notification: Performance of sorting global known variables: time 0.00137/1.268, allocations: 0.9044 MB / 1.432 GB, free: 10.52 MB / 1.17 GB Notification: Performance of sort global known variables: time 1.2e-07/1.268, allocations: 0 / 1.432 GB, free: 10.52 MB / 1.17 GB Notification: Performance of remove unused functions: time 0.002325/1.271, allocations: 0.8384 MB / 1.433 GB, free: 9.676 MB / 1.17 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 7 * Number of states: 6 (humBac.vol.dynBal.medium.Xi[1],humBac.vol.dynBal.U,humBac.vol.dynBal.m,humFor.vol.dynBal.medium.Xi[1],humFor.vol.dynBal.U,humFor.vol.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 (71): * Single equations (assignments): 71 * 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 0.002828/1.274, allocations: 1.976 MB / 1.435 GB, free: 7.66 MB / 1.17 GB Notification: Performance of simCode: created initialization part: time 0.002358/1.276, allocations: 1.331 MB / 1.436 GB, free: 6.336 MB / 1.17 GB Notification: Performance of simCode: created event and clocks part: time 6.422e-06/1.276, allocations: 320 / 1.436 GB, free: 6.336 MB / 1.17 GB Notification: Performance of simCode: created simulation system equations: time 0.0005086/1.276, allocations: 358.9 kB / 1.437 GB, free: 5.984 MB / 1.17 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.004325/1.281, allocations: 0.8366 MB / 1.438 GB, free: 5.164 MB / 1.17 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.01982/1.301, allocations: 10.72 MB / 1.448 GB, free: 10.11 MB / 1.186 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001578/1.302, allocations: 1.348 MB / 1.449 GB, free: 8.73 MB / 1.186 GB Notification: Performance of simCode: alias equations: time 0.001989/1.304, allocations: 412.3 kB / 1.45 GB, free: 8.324 MB / 1.186 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.001062/1.305, allocations: 0.6086 MB / 1.45 GB, free: 7.715 MB / 1.186 GB Notification: Performance of SimCode: time 1.002e-06/1.305, allocations: 0 / 1.45 GB, free: 7.715 MB / 1.186 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.09727/1.403, allocations: 41.73 MB / 1.491 GB, free: 14.52 MB / 1.232 GB Notification: Performance of buildModelFMU: Generate platform static: time 14.82/16.22, allocations: 12.33 kB / 1.491 GB, free: 14.52 MB / 1.232 GB (rm -f Buildings_9_Buildings.Fluid.Interfaces.Examples.ReverseFlowHumidifier.pipe ; mkfifo Buildings_9_Buildings.Fluid.Interfaces.Examples.ReverseFlowHumidifier.pipe ; head -c 1048576 < Buildings_9_Buildings.Fluid.Interfaces.Examples.ReverseFlowHumidifier.pipe >> ../files/Buildings_9_Buildings.Fluid.Interfaces.Examples.ReverseFlowHumidifier.sim & python3 -m fmpy simulate --output-file Buildings_9_Buildings.Fluid.Interfaces.Examples.ReverseFlowHumidifier_res.csv --start-time 0 --stop-time 1 --timeout 50 --relative-tolerance 1e-06 --interface-type ModelExchange --solver CVode --output-interval 0.0004 Buildings_9_Buildings_Fluid_Interfaces_Examples_ReverseFlowHumidifier.fmu > Buildings_9_Buildings.Fluid.Interfaces.Examples.ReverseFlowHumidifier.pipe 2>&1) diffSimulationResults("Buildings_9_Buildings.Fluid.Interfaces.Examples.ReverseFlowHumidifier_res.csv","/mnt/ReferenceFiles/Buildings/csv/maint_9.1.x/Buildings_Fluid_Interfaces_Examples_ReverseFlowHumidifier.csv","/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/Buildings_9_Buildings.Fluid.Interfaces.Examples.ReverseFlowHumidifier.diff",relTol=0.003,relTolDiffMinMax=0.003,rangeDelta=0.001) Reference file matches