Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr ModelicaTest_3.2.3_ModelicaTest.MultiBody.FourbarVariants.JointUSR.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/ModelicaTest 3.2.3+maint.om/package.mo", uses=false) Using package ModelicaTest with version 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaTest 3.2.3+maint.om/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: "" <> buildModelFMU(ModelicaTest.MultiBody.FourbarVariants.JointUSR,fileNamePrefix="ModelicaTest_3_2_3_ModelicaTest_MultiBody_FourbarVariants_JointUSR",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(ModelicaTest.MultiBody.FourbarVariants.JointUSR,fileNamePrefix="ModelicaTest_3_2_3_ModelicaTest_MultiBody_FourbarVariants_JointUSR",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 0.001207/0.001207, allocations: 105.2 kB / 16.27 MB, free: 5.965 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001317/0.001317, allocations: 189.4 kB / 17.19 MB, free: 5.602 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.55/1.55, allocations: 205.1 MB / 223.1 MB, free: 12.28 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaTest 3.2.3+maint.om/package.mo): time 0.2365/0.2365, allocations: 43.52 MB / 313.9 MB, free: 0.5312 MB / 254.1 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 0.001488/0.001488, allocations: 66.77 kB / 382.8 MB, free: 56.64 MB / 318.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1246/0.1261, allocations: 57.79 MB / 440.6 MB, free: 6.824 MB / 318.1 MB Notification: Performance of NFInst.instantiate(ModelicaTest.MultiBody.FourbarVariants.JointUSR): time 0.0175/0.1436, allocations: 17.78 MB / 458.4 MB, free: 4.961 MB / 334.1 MB Notification: Performance of NFInst.instExpressions: time 0.01367/0.1574, allocations: 5.667 MB / 464.1 MB, free: 15.28 MB / 350.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.003765/0.1612, allocations: 111.7 kB / 464.2 MB, free: 15.17 MB / 350.1 MB Notification: Performance of NFTyping.typeComponents: time 0.009679/0.1709, allocations: 4.583 MB / 468.8 MB, free: 10.57 MB / 350.1 MB Notification: Performance of NFTyping.typeBindings: time 0.009954/0.1809, allocations: 3.023 MB / 471.8 MB, free: 7.539 MB / 350.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.003947/0.1849, allocations: 1.494 MB / 473.3 MB, free: 6.043 MB / 350.1 MB Notification: Performance of NFFlatten.flatten: time 0.01213/0.1971, allocations: 8.608 MB / 481.9 MB, free: 13.42 MB / 366.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.00983/0.2069, allocations: 6.464 MB / 488.3 MB, free: 6.879 MB / 366.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.007212/0.2142, allocations: 3.022 MB / 491.4 MB, free: 3.848 MB / 366.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.007496/0.2218, allocations: 4.288 MB / 495.7 MB, free: 15.55 MB / 382.1 MB Notification: Performance of NFPackage.collectConstants: time 0.00284/0.2246, allocations: 0.6641 MB / 496.3 MB, free: 14.88 MB / 382.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.005213/0.2299, allocations: 1.834 MB / 498.2 MB, free: 13.05 MB / 382.1 MB Notification: Performance of NFScalarize.scalarize: time 0.005476/0.2354, allocations: 3.741 MB / 0.4901 GB, free: 9.297 MB / 382.1 MB Notification: Performance of NFVerifyModel.verify: time 0.009035/0.2445, allocations: 4.28 MB / 0.4943 GB, free: 4.992 MB / 382.1 MB Notification: Performance of NFConvertDAE.convert: time 0.01767/0.2622, allocations: 13.28 MB / 0.5073 GB, free: 7.672 MB / 398.1 MB Notification: Performance of FrontEnd - DAE generated: time 8.676e-06/0.2622, allocations: 0 / 0.5073 GB, free: 7.672 MB / 398.1 MB Notification: Performance of FrontEnd: time 1.593e-06/0.2622, allocations: 0 / 0.5073 GB, free: 7.672 MB / 398.1 MB Notification: Performance of Transformations before backend: time 0.0005284/0.2628, allocations: 0 / 0.5073 GB, free: 7.672 MB / 398.1 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 2782 * Number of variables: 2782 Notification: Performance of Generate backend data structure: time 0.03019/0.293, allocations: 9.212 MB / 0.5163 GB, free: 14.37 MB / 414.1 MB Notification: Performance of prepare preOptimizeDAE: time 7.705e-05/0.2931, allocations: 15.89 kB / 0.5163 GB, free: 14.36 MB / 414.1 MB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.005159/0.2983, allocations: 1.426 MB / 0.5177 GB, free: 12.92 MB / 414.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0322/0.3305, allocations: 5.965 MB / 0.5235 GB, free: 6.934 MB / 414.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.4583/0.7888, allocations: 6.943 MB / 0.5303 GB, free: 78.64 MB / 414.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.001068/0.7899, allocations: 439.3 kB / 0.5307 GB, free: 78.62 MB / 414.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.003504/0.7935, allocations: 0.5963 MB / 0.5313 GB, free: 78.62 MB / 414.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.04/0.8335, allocations: 20.56 MB / 0.5514 GB, free: 71.61 MB / 414.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 0.0002069/0.8337, allocations: 73.36 kB / 0.5514 GB, free: 71.58 MB / 414.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0009452/0.8347, allocations: 272.6 kB / 0.5517 GB, free: 71.46 MB / 414.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.005065/0.8398, allocations: 3.719 MB / 0.5553 GB, free: 70.43 MB / 414.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.03251/0.8723, allocations: 18.06 MB / 0.573 GB, free: 52.89 MB / 414.1 MB 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 0.09565/0.968, allocations: 74.37 MB / 0.6456 GB, free: 8.961 MB / 446.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.01905/0.9871, allocations: 7.427 MB / 0.6528 GB, free: 1.281 MB / 446.1 MB Notification: Performance of preOpt resolveLoops (simulation): time 0.006178/0.9933, allocations: 4.024 MB / 0.6568 GB, free: 13.24 MB / 462.1 MB Notification: Performance of preOpt evalFunc (simulation): time 0.03099/1.024, allocations: 17.97 MB / 0.6743 GB, free: 10.59 MB / 478.1 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 7.237e-05/1.024, allocations: 72.55 kB / 0.6744 GB, free: 10.51 MB / 478.1 MB Notification: Performance of pre-optimization done (n=332): time 8.576e-06/1.024, allocations: 0 / 0.6744 GB, free: 10.51 MB / 478.1 MB Notification: Performance of matching and sorting (n=413): time 0.1222/1.147, allocations: 34.83 MB / 0.7084 GB, free: 7.516 MB / 0.4982 GB Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001489/1.147, allocations: 196.9 kB / 0.7086 GB, free: 7.285 MB / 0.4982 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.01187/1.159, allocations: 6.543 MB / 0.715 GB, free: 0.7461 MB / 0.4982 GB Notification: Performance of collectPreVariables (initialization): time 0.001224/1.16, allocations: 81.7 kB / 0.7151 GB, free: 0.6602 MB / 0.4982 GB Notification: Performance of collectInitialEqns (initialization): time 0.005538/1.166, allocations: 5.435 MB / 0.7204 GB, free: 11.15 MB / 0.5138 GB Notification: Performance of collectInitialBindings (initialization): time 0.002788/1.168, allocations: 1.527 MB / 0.7219 GB, free: 9.602 MB / 0.5138 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.003825/1.172, allocations: 2.063 MB / 0.7239 GB, free: 7.527 MB / 0.5138 GB Notification: Performance of setup shared object (initialization): time 0.0001579/1.172, allocations: 305.1 kB / 0.7242 GB, free: 7.227 MB / 0.5138 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.007793/1.18, allocations: 4.171 MB / 0.7282 GB, free: 3.051 MB / 0.5138 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.2571/1.437, allocations: 10.06 MB / 0.7381 GB, free: 165.5 MB / 0.5138 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.01914/1.457, allocations: 15.36 MB / 0.7531 GB, free: 155.2 MB / 0.5138 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 0.0003498/1.457, allocations: 58.44 kB / 0.7531 GB, free: 155.2 MB / 0.5138 GB Notification: Performance of matching and sorting (n=1377) (initialization): time 0.03712/1.494, allocations: 15.94 MB / 0.7687 GB, free: 149.6 MB / 0.5138 GB Notification: Performance of prepare postOptimizeDAE: time 0.0001732/1.494, allocations: 97.88 kB / 0.7688 GB, free: 149.6 MB / 0.5138 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 0.0002817/1.495, allocations: 204.4 kB / 0.769 GB, free: 149.6 MB / 0.5138 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.007274/1.502, allocations: 2.314 MB / 0.7712 GB, free: 149.2 MB / 0.5138 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.007889/1.51, allocations: 2.404 MB / 0.7736 GB, free: 149 MB / 0.5138 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.01768/1.528, allocations: 12.51 MB / 0.7858 GB, free: 141.8 MB / 0.5138 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.009669/1.537, allocations: 0.5734 MB / 0.7864 GB, free: 141.4 MB / 0.5138 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.002147/1.539, allocations: 0.5952 MB / 0.787 GB, free: 140.8 MB / 0.5138 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 937 * Number of states: 0 () * Number of discrete variables: 49 (jointUSR.revolute.positiveBranch,Body3.sphereColor[3],Body3.sphereColor[2],Body3.sphereColor[1],Body2.sphereColor[3],Body2.sphereColor[2],Body2.sphereColor[1],Body1.sphereColor[3],Body1.sphereColor[2],Body1.sphereColor[1],jointUSR.rod1Color[3],jointUSR.rod1Color[2],jointUSR.rod1Color[1],jointUSR.cylinderColor[3],jointUSR.cylinderColor[2],jointUSR.cylinderColor[1],jointUSR.sphereColor[3],jointUSR.sphereColor[2],jointUSR.sphereColor[1],jointUSR.revoluteColor[3],jointUSR.revoluteColor[2],jointUSR.revoluteColor[1],fixedFrame.color_x[3],fixedFrame.color_x[2],fixedFrame.color_x[1],b3.color[3],b3.color[2],b3.color[1],b2.color[3],b2.color[2],b2.color[1],b2.body.sphereColor[3],b2.body.sphereColor[2],b2.body.sphereColor[1],j2.boxColor[3],j2.boxColor[2],j2.boxColor[1],world.gravityArrowColor[3],world.gravityArrowColor[2],world.gravityArrowColor[1],world.axisColor_x[3],world.axisColor_x[2],world.axisColor_x[1],world.groundColor[3],world.groundColor[2],world.groundColor[1],world.gravitySphereColor[3],world.gravitySphereColor[2],world.gravitySphereColor[1]) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (1276): * Single equations (assignments): 1269 * Array equations: 6 * Algorithm blocks: 0 * Record equations: 0 * 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): 1 system {(2,52,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 0 systems Notification: Performance of prepare postOptimizeDAE: time 0.007537/1.547, allocations: 3.764 MB / 0.7906 GB, free: 137.6 MB / 0.5138 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.001597/1.549, allocations: 0.5936 MB / 0.7912 GB, free: 137.3 MB / 0.5138 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.01525/1.564, allocations: 8.171 MB / 0.7992 GB, free: 130.2 MB / 0.5138 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 8.346e-05/1.564, allocations: 68.61 kB / 0.7993 GB, free: 130.1 MB / 0.5138 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 2.464e-05/1.564, allocations: 8 kB / 0.7993 GB, free: 130.1 MB / 0.5138 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 4.982e-05/1.564, allocations: 23.92 kB / 0.7993 GB, free: 130.1 MB / 0.5138 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.03281/1.597, allocations: 18.65 MB / 0.8175 GB, free: 111.2 MB / 0.5138 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 3.494e-05/1.597, allocations: 15.94 kB / 0.8175 GB, free: 111.2 MB / 0.5138 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.002551/1.6, allocations: 0.6093 MB / 0.8181 GB, free: 110.6 MB / 0.5138 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.005925/1.606, allocations: 1.751 MB / 0.8198 GB, free: 108.9 MB / 0.5138 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0004216/1.606, allocations: 81.62 kB / 0.8199 GB, free: 108.8 MB / 0.5138 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.01439/1.62, allocations: 10.6 MB / 0.8302 GB, free: 98.14 MB / 0.5138 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.477e-05/1.62, allocations: 16.88 kB / 0.8303 GB, free: 98.12 MB / 0.5138 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.01883/1.639, allocations: 12.17 MB / 0.8421 GB, free: 85.74 MB / 0.5138 GB Notification: Performance of postOpt removeConstants (simulation): time 0.003122/1.642, allocations: 1.138 MB / 0.8433 GB, free: 84.58 MB / 0.5138 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.001279/1.644, allocations: 79.86 kB / 0.8433 GB, free: 84.5 MB / 0.5138 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.003364/1.647, allocations: 203.7 kB / 0.8435 GB, free: 84.3 MB / 0.5138 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0006859/1.648, allocations: 261.7 kB / 0.8438 GB, free: 84.05 MB / 0.5138 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0002455/1.648, allocations: 114.9 kB / 0.8439 GB, free: 83.94 MB / 0.5138 GB Notification: Performance of sorting global known variables: time 0.006174/1.654, allocations: 4.074 MB / 0.8479 GB, free: 79.88 MB / 0.5138 GB Notification: Performance of sort global known variables: time 4.61e-07/1.654, allocations: 0 / 0.8479 GB, free: 79.88 MB / 0.5138 GB Notification: Performance of remove unused functions: time 0.0102/1.665, allocations: 1.91 MB / 0.8497 GB, free: 77.97 MB / 0.5138 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 52 * Number of states: 2 (j2.s,j2.v) * 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 (325): * Single equations (assignments): 318 * Array equations: 6 * Algorithm blocks: 0 * Record equations: 0 * 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): 1 system {(2,42,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 0 systems Notification: Performance of Backend phase and start with SimCode phase: time 0.01938/1.684, allocations: 12.93 MB / 0.8624 GB, free: 64.78 MB / 0.5138 GB Notification: Performance of simCode: created initialization part: time 0.0249/1.709, allocations: 15.44 MB / 0.8774 GB, free: 49.39 MB / 0.5138 GB Notification: Performance of simCode: created event and clocks part: time 1.719e-05/1.709, allocations: 0 / 0.8774 GB, free: 49.39 MB / 0.5138 GB Notification: Performance of simCode: created simulation system equations: time 0.004557/1.713, allocations: 3.312 MB / 0.8807 GB, free: 46.06 MB / 0.5138 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.00506/1.719, allocations: 0.8122 MB / 0.8815 GB, free: 45.27 MB / 0.5138 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.3804/2.099, allocations: 105.8 MB / 0.9848 GB, free: 141.4 MB / 0.5294 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.006803/2.106, allocations: 5.59 MB / 0.9903 GB, free: 135.9 MB / 0.5294 GB Notification: Performance of simCode: alias equations: time 0.008306/2.114, allocations: 3.321 MB / 0.9935 GB, free: 132.6 MB / 0.5294 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.00562/2.12, allocations: 3.69 MB / 0.9971 GB, free: 128.9 MB / 0.5294 GB Notification: Performance of SimCode: time 1.433e-06/2.12, allocations: 0 / 0.9971 GB, free: 128.9 MB / 0.5294 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.4156/2.536, allocations: 135 MB / 1.129 GB, free: 163 MB / 0.5294 GB Notification: Performance of buildModelFMU: Generate platform static: time 13.83/16.37, allocations: 9 kB / 1.129 GB, free: 163 MB / 0.5294 GB (rm -f ModelicaTest_3.2.3_ModelicaTest.MultiBody.FourbarVariants.JointUSR.pipe ; mkfifo ModelicaTest_3.2.3_ModelicaTest.MultiBody.FourbarVariants.JointUSR.pipe ; head -c 1048576 < ModelicaTest_3.2.3_ModelicaTest.MultiBody.FourbarVariants.JointUSR.pipe >> ../files/ModelicaTest_3.2.3_ModelicaTest.MultiBody.FourbarVariants.JointUSR.sim & python3 -m fmpy simulate --output-file ModelicaTest_3.2.3_ModelicaTest.MultiBody.FourbarVariants.JointUSR_res.csv --start-time 0 --stop-time 2 --timeout 50 --relative-tolerance 1e-06 --interface-type ModelExchange --solver CVode --output-interval 0.0008 ModelicaTest_3_2_3_ModelicaTest_MultiBody_FourbarVariants_JointUSR.fmu > ModelicaTest_3.2.3_ModelicaTest.MultiBody.FourbarVariants.JointUSR.pipe 2>&1) diffSimulationResults("ModelicaTest_3.2.3_ModelicaTest.MultiBody.FourbarVariants.JointUSR_res.csv","/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/Reference-modelica.org/ReferenceResults/MAP-LIB_ReferenceResults/v3.2.3+build.4/ModelicaTest/MultiBody/FourbarVariants/JointUSR/JointUSR.csv","/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/ModelicaTest_3.2.3_ModelicaTest.MultiBody.FourbarVariants.JointUSR.diff",relTol=0.003,relTolDiffMinMax=0.003,rangeDelta=0.001) Reference file matches