./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/vnew1.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ca4ee3dd Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/vnew1.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 92c9725cc4c9709a9ab81826fb3481ef81541ab6f68244b6727f50e97bc0f0c0 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-ca4ee3d-m [2024-09-20 18:57:52,991 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 18:57:53,041 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 18:57:53,046 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 18:57:53,047 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 18:57:53,067 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 18:57:53,068 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 18:57:53,068 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 18:57:53,069 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 18:57:53,070 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 18:57:53,070 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 18:57:53,071 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 18:57:53,071 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 18:57:53,071 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 18:57:53,072 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 18:57:53,072 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 18:57:53,072 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 18:57:53,072 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 18:57:53,073 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 18:57:53,073 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 18:57:53,073 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 18:57:53,074 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 18:57:53,074 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 18:57:53,074 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 18:57:53,074 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 18:57:53,074 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 18:57:53,075 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 18:57:53,075 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 18:57:53,075 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 18:57:53,075 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 18:57:53,076 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 18:57:53,076 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 18:57:53,076 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 18:57:53,076 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 18:57:53,077 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 18:57:53,077 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 18:57:53,077 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 18:57:53,077 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 18:57:53,078 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 18:57:53,078 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 18:57:53,078 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 18:57:53,078 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 18:57:53,079 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 92c9725cc4c9709a9ab81826fb3481ef81541ab6f68244b6727f50e97bc0f0c0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 18:57:53,285 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 18:57:53,313 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 18:57:53,315 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 18:57:53,316 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 18:57:53,317 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 18:57:53,318 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/vnew1.c [2024-09-20 18:57:54,679 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 18:57:54,819 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 18:57:54,819 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/vnew1.c [2024-09-20 18:57:54,825 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/ee8ee8760/4de7417914c34d40b742d8ad082b2eb1/FLAG96db061c5 [2024-09-20 18:57:54,834 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/ee8ee8760/4de7417914c34d40b742d8ad082b2eb1 [2024-09-20 18:57:54,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 18:57:54,841 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 18:57:54,842 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 18:57:54,842 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 18:57:54,847 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 18:57:54,848 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 06:57:54" (1/1) ... [2024-09-20 18:57:54,849 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@131aebe6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:57:54, skipping insertion in model container [2024-09-20 18:57:54,849 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 06:57:54" (1/1) ... [2024-09-20 18:57:54,867 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 18:57:54,982 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/vnew1.c[403,416] [2024-09-20 18:57:54,994 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 18:57:55,002 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 18:57:55,011 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/vnew1.c[403,416] [2024-09-20 18:57:55,014 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 18:57:55,028 INFO L204 MainTranslator]: Completed translation [2024-09-20 18:57:55,028 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:57:55 WrapperNode [2024-09-20 18:57:55,028 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 18:57:55,029 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 18:57:55,029 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 18:57:55,030 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 18:57:55,036 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:57:55" (1/1) ... [2024-09-20 18:57:55,042 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:57:55" (1/1) ... [2024-09-20 18:57:55,048 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 18:57:55,048 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 18:57:55,049 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 18:57:55,049 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 18:57:55,049 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 18:57:55,057 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:57:55" (1/1) ... [2024-09-20 18:57:55,058 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:57:55" (1/1) ... [2024-09-20 18:57:55,062 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:57:55" (1/1) ... [2024-09-20 18:57:55,080 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2024-09-20 18:57:55,080 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:57:55" (1/1) ... [2024-09-20 18:57:55,084 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:57:55" (1/1) ... [2024-09-20 18:57:55,086 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:57:55" (1/1) ... [2024-09-20 18:57:55,088 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:57:55" (1/1) ... [2024-09-20 18:57:55,089 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:57:55" (1/1) ... [2024-09-20 18:57:55,090 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:57:55" (1/1) ... [2024-09-20 18:57:55,092 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 18:57:55,096 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 18:57:55,096 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 18:57:55,096 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 18:57:55,097 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:57:55" (1/1) ... [2024-09-20 18:57:55,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 18:57:55,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:57:55,135 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-20 18:57:55,141 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-20 18:57:55,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 18:57:55,202 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 18:57:55,202 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 18:57:55,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 18:57:55,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-20 18:57:55,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 18:57:55,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 18:57:55,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 18:57:55,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 18:57:55,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 18:57:55,205 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 18:57:55,261 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 18:57:55,263 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 18:57:55,429 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-09-20 18:57:55,429 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 18:57:55,448 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 18:57:55,448 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-20 18:57:55,448 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 06:57:55 BoogieIcfgContainer [2024-09-20 18:57:55,449 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 18:57:55,452 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 18:57:55,452 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 18:57:55,455 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 18:57:55,455 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 06:57:54" (1/3) ... [2024-09-20 18:57:55,455 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3da82e26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 06:57:55, skipping insertion in model container [2024-09-20 18:57:55,455 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:57:55" (2/3) ... [2024-09-20 18:57:55,455 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3da82e26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 06:57:55, skipping insertion in model container [2024-09-20 18:57:55,455 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 06:57:55" (3/3) ... [2024-09-20 18:57:55,457 INFO L112 eAbstractionObserver]: Analyzing ICFG vnew1.c [2024-09-20 18:57:55,468 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 18:57:55,469 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 18:57:55,518 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 18:57:55,524 INFO L336 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@47a42e81, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 18:57:55,524 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 18:57:55,528 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:57:55,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-20 18:57:55,533 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:57:55,534 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:57:55,534 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:57:55,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:57:55,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1892212544, now seen corresponding path program 1 times [2024-09-20 18:57:55,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:57:55,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473811858] [2024-09-20 18:57:55,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:57:55,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:57:55,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:57:56,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:57:56,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:57:56,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:57:56,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:57:56,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473811858] [2024-09-20 18:57:56,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473811858] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:57:56,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:57:56,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-20 18:57:56,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047461579] [2024-09-20 18:57:56,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:57:56,157 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-20 18:57:56,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:57:56,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-20 18:57:56,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-09-20 18:57:56,175 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 10 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:57:56,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:57:56,403 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2024-09-20 18:57:56,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-20 18:57:56,405 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-09-20 18:57:56,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:57:56,411 INFO L225 Difference]: With dead ends: 46 [2024-09-20 18:57:56,411 INFO L226 Difference]: Without dead ends: 26 [2024-09-20 18:57:56,414 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2024-09-20 18:57:56,418 INFO L434 NwaCegarLoop]: 4 mSDtfsCounter, 57 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:57:56,419 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 27 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:57:56,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-20 18:57:56,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2024-09-20 18:57:56,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:57:56,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2024-09-20 18:57:56,457 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 13 [2024-09-20 18:57:56,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:57:56,458 INFO L474 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2024-09-20 18:57:56,459 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:57:56,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:57:56,460 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2024-09-20 18:57:56,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-20 18:57:56,461 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:57:56,461 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:57:56,461 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 18:57:56,461 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:57:56,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:57:56,462 INFO L85 PathProgramCache]: Analyzing trace with hash 706153222, now seen corresponding path program 1 times [2024-09-20 18:57:56,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:57:56,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289570257] [2024-09-20 18:57:56,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:57:56,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:57:56,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:57:56,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:57:56,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:57:56,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:57:56,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:57:56,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289570257] [2024-09-20 18:57:56,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289570257] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:57:56,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420592239] [2024-09-20 18:57:56,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:57:56,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:57:56,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:57:56,872 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:57:56,873 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 18:57:56,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:57:56,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-20 18:57:56,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:57:57,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:57:57,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:57:57,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:57:57,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420592239] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:57:57,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:57:57,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 21 [2024-09-20 18:57:57,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182286893] [2024-09-20 18:57:57,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:57:57,379 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 18:57:57,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:57:57,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 18:57:57,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-09-20 18:57:57,380 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 21 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 18:57:57,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:57:57,937 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2024-09-20 18:57:57,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-20 18:57:57,938 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2024-09-20 18:57:57,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:57:57,940 INFO L225 Difference]: With dead ends: 50 [2024-09-20 18:57:57,940 INFO L226 Difference]: Without dead ends: 48 [2024-09-20 18:57:57,941 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2024-09-20 18:57:57,941 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 90 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:57:57,942 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 25 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:57:57,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-20 18:57:57,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2024-09-20 18:57:57,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 18:57:57,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2024-09-20 18:57:57,955 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 14 [2024-09-20 18:57:57,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:57:57,955 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2024-09-20 18:57:57,955 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 18:57:57,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:57:57,956 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2024-09-20 18:57:57,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-20 18:57:57,957 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:57:57,957 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:57:57,970 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-20 18:57:58,161 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:57:58,162 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:57:58,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:57:58,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1759027392, now seen corresponding path program 2 times [2024-09-20 18:57:58,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:57:58,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074049320] [2024-09-20 18:57:58,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:57:58,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:57:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:57:58,449 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:57:58,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:57:58,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:57:58,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:57:58,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074049320] [2024-09-20 18:57:58,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074049320] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:57:58,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975348676] [2024-09-20 18:57:58,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:57:58,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:57:58,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:57:58,479 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:57:58,484 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 18:57:58,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:57:58,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:57:58,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-20 18:57:58,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:57:58,707 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:57:58,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:57:58,988 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:57:58,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975348676] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:57:58,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:57:58,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2024-09-20 18:57:58,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718568246] [2024-09-20 18:57:58,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:57:58,989 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-20 18:57:58,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:57:58,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-20 18:57:58,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2024-09-20 18:57:58,991 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 23 states have internal predecessors, (33), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 18:58:00,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:58:00,216 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2024-09-20 18:58:00,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-20 18:58:00,217 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.32) internal successors, (33), 23 states have internal predecessors, (33), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2024-09-20 18:58:00,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:58:00,220 INFO L225 Difference]: With dead ends: 82 [2024-09-20 18:58:00,220 INFO L226 Difference]: Without dead ends: 80 [2024-09-20 18:58:00,220 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=373, Invalid=1607, Unknown=0, NotChecked=0, Total=1980 [2024-09-20 18:58:00,223 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 154 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-20 18:58:00,223 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 28 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-20 18:58:00,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-09-20 18:58:00,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 48. [2024-09-20 18:58:00,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 38 states have internal predecessors, (51), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 18:58:00,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2024-09-20 18:58:00,249 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 17 [2024-09-20 18:58:00,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:58:00,249 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2024-09-20 18:58:00,249 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.32) internal successors, (33), 23 states have internal predecessors, (33), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 18:58:00,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:58:00,250 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2024-09-20 18:58:00,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-20 18:58:00,251 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:58:00,251 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:58:00,263 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 18:58:00,455 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:58:00,456 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:58:00,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:58:00,457 INFO L85 PathProgramCache]: Analyzing trace with hash 447679010, now seen corresponding path program 1 times [2024-09-20 18:58:00,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:58:00,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077142013] [2024-09-20 18:58:00,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:58:00,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:58:00,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:58:00,743 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:58:00,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:58:00,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 18:58:00,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:58:00,764 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:58:00,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:58:00,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077142013] [2024-09-20 18:58:00,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077142013] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:58:00,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395264779] [2024-09-20 18:58:00,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:58:00,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:58:00,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:58:00,766 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:58:00,767 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 18:58:00,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:58:00,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-20 18:58:00,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:58:00,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:58:00,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:58:01,137 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:58:01,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395264779] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:58:01,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:58:01,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 23 [2024-09-20 18:58:01,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667071420] [2024-09-20 18:58:01,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:58:01,139 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 18:58:01,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:58:01,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 18:58:01,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2024-09-20 18:58:01,141 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 20 states have internal predecessors, (38), 8 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-20 18:58:03,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:58:03,145 INFO L93 Difference]: Finished difference Result 93 states and 116 transitions. [2024-09-20 18:58:03,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 18:58:03,145 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 20 states have internal predecessors, (38), 8 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 23 [2024-09-20 18:58:03,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:58:03,146 INFO L225 Difference]: With dead ends: 93 [2024-09-20 18:58:03,147 INFO L226 Difference]: Without dead ends: 91 [2024-09-20 18:58:03,147 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2024-09-20 18:58:03,148 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 102 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-20 18:58:03,148 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 41 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-20 18:58:03,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-09-20 18:58:03,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2024-09-20 18:58:03,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 71 states have internal predecessors, (79), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (16), 10 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-20 18:58:03,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2024-09-20 18:58:03,198 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 23 [2024-09-20 18:58:03,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:58:03,199 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2024-09-20 18:58:03,199 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 20 states have internal predecessors, (38), 8 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-20 18:58:03,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:58:03,199 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2024-09-20 18:58:03,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-20 18:58:03,200 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:58:03,200 INFO L216 NwaCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:58:03,213 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 18:58:03,404 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:58:03,405 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:58:03,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:58:03,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1692277824, now seen corresponding path program 3 times [2024-09-20 18:58:03,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:58:03,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267431283] [2024-09-20 18:58:03,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:58:03,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:58:03,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:58:03,957 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:58:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:58:03,989 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:58:03,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:58:03,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267431283] [2024-09-20 18:58:03,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267431283] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:58:03,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983860739] [2024-09-20 18:58:03,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:58:03,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:58:03,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:58:03,993 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:58:03,994 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 18:58:04,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-20 18:58:04,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:58:04,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-20 18:58:04,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:58:04,567 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:58:04,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:58:05,350 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:58:05,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983860739] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:58:05,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:58:05,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 48 [2024-09-20 18:58:05,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487839348] [2024-09-20 18:58:05,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:58:05,351 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-20 18:58:05,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:58:05,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-20 18:58:05,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1880, Unknown=0, NotChecked=0, Total=2256 [2024-09-20 18:58:05,356 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand has 48 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 45 states have internal predecessors, (57), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 18:58:17,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 18:58:26,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 18:58:27,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:58:27,045 INFO L93 Difference]: Finished difference Result 151 states and 195 transitions. [2024-09-20 18:58:27,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-20 18:58:27,046 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 45 states have internal predecessors, (57), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2024-09-20 18:58:27,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:58:27,047 INFO L225 Difference]: With dead ends: 151 [2024-09-20 18:58:27,047 INFO L226 Difference]: Without dead ends: 149 [2024-09-20 18:58:27,052 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=1319, Invalid=5821, Unknown=0, NotChecked=0, Total=7140 [2024-09-20 18:58:27,052 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 384 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 173 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 1634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2024-09-20 18:58:27,052 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 76 Invalid, 1634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 1459 Invalid, 2 Unknown, 0 Unchecked, 9.4s Time] [2024-09-20 18:58:27,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-09-20 18:58:27,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 126. [2024-09-20 18:58:27,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 96 states have (on average 1.3020833333333333) internal successors, (125), 105 states have internal predecessors, (125), 21 states have call successors, (21), 9 states have call predecessors, (21), 8 states have return successors, (20), 11 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-20 18:58:27,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 166 transitions. [2024-09-20 18:58:27,106 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 166 transitions. Word has length 25 [2024-09-20 18:58:27,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:58:27,106 INFO L474 AbstractCegarLoop]: Abstraction has 126 states and 166 transitions. [2024-09-20 18:58:27,107 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 45 states have internal predecessors, (57), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 18:58:27,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:58:27,107 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 166 transitions. [2024-09-20 18:58:27,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-20 18:58:27,108 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:58:27,108 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:58:27,121 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-20 18:58:27,312 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:58:27,313 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:58:27,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:58:27,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1835559814, now seen corresponding path program 2 times [2024-09-20 18:58:27,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:58:27,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628055494] [2024-09-20 18:58:27,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:58:27,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:58:27,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:58:27,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:58:27,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:58:27,527 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 18:58:27,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:58:27,533 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 18:58:27,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:58:27,538 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 18:58:27,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:58:27,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628055494] [2024-09-20 18:58:27,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628055494] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:58:27,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755174647] [2024-09-20 18:58:27,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:58:27,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:58:27,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:58:27,541 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:58:27,543 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 18:58:27,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:58:27,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:58:27,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-20 18:58:27,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:58:27,667 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 18:58:27,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:58:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 18:58:27,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755174647] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:58:27,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:58:27,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2024-09-20 18:58:27,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868989285] [2024-09-20 18:58:27,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:58:27,969 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-20 18:58:27,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:58:27,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-20 18:58:27,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2024-09-20 18:58:27,970 INFO L87 Difference]: Start difference. First operand 126 states and 166 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 18:58:28,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:58:28,415 INFO L93 Difference]: Finished difference Result 161 states and 204 transitions. [2024-09-20 18:58:28,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 18:58:28,416 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 28 [2024-09-20 18:58:28,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:58:28,418 INFO L225 Difference]: With dead ends: 161 [2024-09-20 18:58:28,418 INFO L226 Difference]: Without dead ends: 118 [2024-09-20 18:58:28,419 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2024-09-20 18:58:28,420 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 32 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:58:28,421 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 31 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:58:28,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-09-20 18:58:28,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2024-09-20 18:58:28,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 90 states have (on average 1.288888888888889) internal successors, (116), 98 states have internal predecessors, (116), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (19), 11 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-20 18:58:28,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 155 transitions. [2024-09-20 18:58:28,517 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 155 transitions. Word has length 28 [2024-09-20 18:58:28,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:58:28,517 INFO L474 AbstractCegarLoop]: Abstraction has 118 states and 155 transitions. [2024-09-20 18:58:28,517 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 18:58:28,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:58:28,518 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 155 transitions. [2024-09-20 18:58:28,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-20 18:58:28,522 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:58:28,522 INFO L216 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:58:28,534 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 18:58:28,726 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-20 18:58:28,729 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:58:28,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:58:28,730 INFO L85 PathProgramCache]: Analyzing trace with hash -2066924416, now seen corresponding path program 3 times [2024-09-20 18:58:28,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:58:28,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623450451] [2024-09-20 18:58:28,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:58:28,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:58:28,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:58:29,452 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:58:29,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:58:29,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-20 18:58:29,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:58:29,482 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-20 18:58:29,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:58:29,485 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 18:58:29,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:58:29,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623450451] [2024-09-20 18:58:29,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623450451] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:58:29,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315823040] [2024-09-20 18:58:29,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:58:29,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:58:29,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:58:29,489 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:58:29,491 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 18:58:29,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 18:58:29,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:58:29,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-20 18:58:29,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:58:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:58:30,552 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:58:48,517 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 18:58:48,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315823040] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:58:48,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:58:48,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 13] total 37 [2024-09-20 18:58:48,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689330671] [2024-09-20 18:58:48,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:58:48,519 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-20 18:58:48,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:58:48,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-20 18:58:48,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1151, Unknown=0, NotChecked=0, Total=1332 [2024-09-20 18:58:48,521 INFO L87 Difference]: Start difference. First operand 118 states and 155 transitions. Second operand has 37 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 10 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-20 18:58:53,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 18:58:58,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 18:59:03,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 18:59:04,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:04,379 INFO L93 Difference]: Finished difference Result 172 states and 219 transitions. [2024-09-20 18:59:04,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-20 18:59:04,379 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 10 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 33 [2024-09-20 18:59:04,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:04,380 INFO L225 Difference]: With dead ends: 172 [2024-09-20 18:59:04,381 INFO L226 Difference]: Without dead ends: 170 [2024-09-20 18:59:04,381 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=586, Invalid=3073, Unknown=1, NotChecked=0, Total=3660 [2024-09-20 18:59:04,382 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 169 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 80 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:04,382 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 44 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 519 Invalid, 2 Unknown, 0 Unchecked, 9.9s Time] [2024-09-20 18:59:04,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-09-20 18:59:04,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2024-09-20 18:59:04,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 125 states have (on average 1.208) internal successors, (151), 136 states have internal predecessors, (151), 33 states have call successors, (33), 11 states have call predecessors, (33), 10 states have return successors, (32), 21 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-20 18:59:04,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 216 transitions. [2024-09-20 18:59:04,455 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 216 transitions. Word has length 33 [2024-09-20 18:59:04,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:04,455 INFO L474 AbstractCegarLoop]: Abstraction has 169 states and 216 transitions. [2024-09-20 18:59:04,455 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 10 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-20 18:59:04,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:04,456 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 216 transitions. [2024-09-20 18:59:04,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-20 18:59:04,457 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:04,457 INFO L216 NwaCegarLoop]: trace histogram [14, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:59:04,471 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 18:59:04,661 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:04,662 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:04,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:04,662 INFO L85 PathProgramCache]: Analyzing trace with hash 2049998720, now seen corresponding path program 4 times [2024-09-20 18:59:04,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:04,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132674406] [2024-09-20 18:59:04,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:04,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:04,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:05,888 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:05,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:05,919 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 18:59:05,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:05,922 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-20 18:59:05,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:05,924 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 4 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 18:59:05,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:05,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132674406] [2024-09-20 18:59:05,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132674406] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:05,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199455238] [2024-09-20 18:59:05,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 18:59:05,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:05,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:05,926 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:59:05,927 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 18:59:06,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 18:59:06,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:59:06,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-20 18:59:06,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:59:06,753 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 4 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 18:59:06,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:59:08,121 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 4 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 18:59:08,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199455238] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:59:08,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:59:08,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 60 [2024-09-20 18:59:08,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681825378] [2024-09-20 18:59:08,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:59:08,122 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-09-20 18:59:08,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:08,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-09-20 18:59:08,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=3000, Unknown=0, NotChecked=0, Total=3540 [2024-09-20 18:59:08,124 INFO L87 Difference]: Start difference. First operand 169 states and 216 transitions. Second operand has 60 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 57 states have internal predecessors, (78), 11 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-20 18:59:14,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:14,997 INFO L93 Difference]: Finished difference Result 224 states and 282 transitions. [2024-09-20 18:59:14,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-20 18:59:14,998 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 57 states have internal predecessors, (78), 11 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 41 [2024-09-20 18:59:14,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:14,999 INFO L225 Difference]: With dead ends: 224 [2024-09-20 18:59:14,999 INFO L226 Difference]: Without dead ends: 222 [2024-09-20 18:59:15,001 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1321, Invalid=6689, Unknown=0, NotChecked=0, Total=8010 [2024-09-20 18:59:15,002 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 220 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 1458 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:15,002 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 77 Invalid, 1591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1458 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-09-20 18:59:15,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-09-20 18:59:15,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 212. [2024-09-20 18:59:15,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 153 states have (on average 1.1699346405228759) internal successors, (179), 168 states have internal predecessors, (179), 46 states have call successors, (46), 13 states have call predecessors, (46), 12 states have return successors, (45), 30 states have call predecessors, (45), 45 states have call successors, (45) [2024-09-20 18:59:15,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 270 transitions. [2024-09-20 18:59:15,098 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 270 transitions. Word has length 41 [2024-09-20 18:59:15,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:15,098 INFO L474 AbstractCegarLoop]: Abstraction has 212 states and 270 transitions. [2024-09-20 18:59:15,098 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 57 states have internal predecessors, (78), 11 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-20 18:59:15,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:15,099 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 270 transitions. [2024-09-20 18:59:15,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-20 18:59:15,101 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:15,101 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:59:15,114 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-20 18:59:15,301 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:15,302 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:15,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:15,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1054157638, now seen corresponding path program 5 times [2024-09-20 18:59:15,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:15,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287954830] [2024-09-20 18:59:15,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:15,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:15,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:15,700 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:15,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:15,721 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 18:59:15,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:15,724 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-20 18:59:15,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:15,726 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-20 18:59:15,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:15,729 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-20 18:59:15,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:15,731 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 18:59:15,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:15,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287954830] [2024-09-20 18:59:15,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287954830] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:15,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076379104] [2024-09-20 18:59:15,732 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 18:59:15,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:15,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:15,734 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:59:15,735 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 18:59:15,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-20 18:59:15,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:59:15,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-20 18:59:15,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:59:16,223 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 18:59:16,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:59:17,109 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 18:59:17,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076379104] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:59:17,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:59:17,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 38 [2024-09-20 18:59:17,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643109601] [2024-09-20 18:59:17,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:59:17,112 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-20 18:59:17,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:17,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-20 18:59:17,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1287, Unknown=0, NotChecked=0, Total=1406 [2024-09-20 18:59:17,113 INFO L87 Difference]: Start difference. First operand 212 states and 270 transitions. Second operand has 38 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 17 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2024-09-20 18:59:25,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:25,750 INFO L93 Difference]: Finished difference Result 253 states and 315 transitions. [2024-09-20 18:59:25,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-20 18:59:25,751 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 17 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) Word has length 44 [2024-09-20 18:59:25,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:25,752 INFO L225 Difference]: With dead ends: 253 [2024-09-20 18:59:25,752 INFO L226 Difference]: Without dead ends: 224 [2024-09-20 18:59:25,754 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=662, Invalid=3628, Unknown=0, NotChecked=0, Total=4290 [2024-09-20 18:59:25,754 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 173 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:25,754 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 82 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-09-20 18:59:25,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2024-09-20 18:59:25,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 222. [2024-09-20 18:59:25,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 160 states have (on average 1.15625) internal successors, (185), 174 states have internal predecessors, (185), 48 states have call successors, (48), 14 states have call predecessors, (48), 13 states have return successors, (47), 33 states have call predecessors, (47), 47 states have call successors, (47) [2024-09-20 18:59:25,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 280 transitions. [2024-09-20 18:59:25,858 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 280 transitions. Word has length 44 [2024-09-20 18:59:25,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:25,858 INFO L474 AbstractCegarLoop]: Abstraction has 222 states and 280 transitions. [2024-09-20 18:59:25,858 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 17 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2024-09-20 18:59:25,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:25,858 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 280 transitions. [2024-09-20 18:59:25,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-20 18:59:25,859 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:25,859 INFO L216 NwaCegarLoop]: trace histogram [9, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:59:25,873 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-20 18:59:26,063 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:26,064 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:26,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:26,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1495655394, now seen corresponding path program 6 times [2024-09-20 18:59:26,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:26,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978187413] [2024-09-20 18:59:26,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:26,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:26,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:26,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:26,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:26,680 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-20 18:59:26,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:26,682 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-20 18:59:26,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:26,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 18:59:26,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 18:59:26,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:26,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978187413] [2024-09-20 18:59:26,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978187413] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:26,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006791413] [2024-09-20 18:59:26,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 18:59:26,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:26,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:26,688 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:59:26,690 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 18:59:26,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-09-20 18:59:26,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:59:26,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-20 18:59:26,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:59:27,280 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 18:59:27,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:59:28,046 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 18:59:28,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006791413] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:59:28,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:59:28,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 17] total 49 [2024-09-20 18:59:28,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419552328] [2024-09-20 18:59:28,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:59:28,048 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-20 18:59:28,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:28,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-20 18:59:28,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=1994, Unknown=0, NotChecked=0, Total=2352 [2024-09-20 18:59:28,049 INFO L87 Difference]: Start difference. First operand 222 states and 280 transitions. Second operand has 49 states, 48 states have (on average 1.5) internal successors, (72), 47 states have internal predecessors, (72), 14 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2024-09-20 18:59:30,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:59:30,998 INFO L93 Difference]: Finished difference Result 256 states and 320 transitions. [2024-09-20 18:59:30,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-20 18:59:30,999 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.5) internal successors, (72), 47 states have internal predecessors, (72), 14 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 43 [2024-09-20 18:59:30,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:59:31,003 INFO L225 Difference]: With dead ends: 256 [2024-09-20 18:59:31,003 INFO L226 Difference]: Without dead ends: 254 [2024-09-20 18:59:31,004 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=894, Invalid=4656, Unknown=0, NotChecked=0, Total=5550 [2024-09-20 18:59:31,005 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 137 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-20 18:59:31,005 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 68 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-20 18:59:31,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-09-20 18:59:31,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 241. [2024-09-20 18:59:31,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 173 states have (on average 1.1445086705202312) internal successors, (198), 187 states have internal predecessors, (198), 53 states have call successors, (53), 15 states have call predecessors, (53), 14 states have return successors, (52), 38 states have call predecessors, (52), 52 states have call successors, (52) [2024-09-20 18:59:31,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 303 transitions. [2024-09-20 18:59:31,111 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 303 transitions. Word has length 43 [2024-09-20 18:59:31,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:59:31,112 INFO L474 AbstractCegarLoop]: Abstraction has 241 states and 303 transitions. [2024-09-20 18:59:31,112 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 1.5) internal successors, (72), 47 states have internal predecessors, (72), 14 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2024-09-20 18:59:31,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:31,112 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 303 transitions. [2024-09-20 18:59:31,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-20 18:59:31,113 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:59:31,113 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:59:31,126 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-20 18:59:31,317 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-20 18:59:31,318 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:59:31,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:59:31,318 INFO L85 PathProgramCache]: Analyzing trace with hash -123973150, now seen corresponding path program 7 times [2024-09-20 18:59:31,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:59:31,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569377879] [2024-09-20 18:59:31,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:59:31,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:59:31,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:36,255 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:59:36,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:36,278 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 18:59:36,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:36,280 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 18:59:36,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:36,282 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 18:59:36,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:36,284 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-20 18:59:36,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:36,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 18:59:36,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 18:59:36,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:59:36,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569377879] [2024-09-20 18:59:36,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569377879] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:59:36,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217598700] [2024-09-20 18:59:36,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 18:59:36,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:59:36,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:59:36,295 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:59:36,300 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 18:59:36,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:59:36,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-20 18:59:36,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:59:36,862 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 50 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 18:59:36,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:59:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 50 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 18:59:37,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217598700] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:59:37,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:59:37,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 15] total 45 [2024-09-20 18:59:37,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267407718] [2024-09-20 18:59:37,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:59:37,547 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-20 18:59:37,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:59:37,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-20 18:59:37,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1799, Unknown=1, NotChecked=0, Total=1980 [2024-09-20 18:59:37,548 INFO L87 Difference]: Start difference. First operand 241 states and 303 transitions. Second operand has 45 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 43 states have internal predecessors, (69), 19 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2024-09-20 18:59:45,944 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification. DAG size of input: 65 DAG size of output: 39 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 18:59:54,112 WARN L293 SmtUtils]: Spent 8.06s on a formula simplification. DAG size of input: 54 DAG size of output: 50 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 19:00:02,212 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification. DAG size of input: 35 DAG size of output: 33 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 19:00:10,412 WARN L293 SmtUtils]: Spent 8.06s on a formula simplification. DAG size of input: 38 DAG size of output: 36 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 19:00:18,954 WARN L293 SmtUtils]: Spent 8.05s on a formula simplification. DAG size of input: 29 DAG size of output: 27 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 19:00:28,280 WARN L293 SmtUtils]: Spent 8.09s on a formula simplification. DAG size of input: 38 DAG size of output: 36 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 19:00:28,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:00:28,535 INFO L93 Difference]: Finished difference Result 295 states and 357 transitions. [2024-09-20 19:00:28,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-20 19:00:28,535 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 43 states have internal predecessors, (69), 19 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) Word has length 53 [2024-09-20 19:00:28,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:00:28,537 INFO L225 Difference]: With dead ends: 295 [2024-09-20 19:00:28,537 INFO L226 Difference]: Without dead ends: 239 [2024-09-20 19:00:28,538 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 54.8s TimeCoverageRelationStatistics Valid=613, Invalid=4642, Unknown=1, NotChecked=0, Total=5256 [2024-09-20 19:00:28,539 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 164 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 1824 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-20 19:00:28,540 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 82 Invalid, 1870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1824 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-20 19:00:28,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-09-20 19:00:28,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2024-09-20 19:00:28,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 172 states have (on average 1.1337209302325582) internal successors, (195), 185 states have internal predecessors, (195), 48 states have call successors, (48), 18 states have call predecessors, (48), 17 states have return successors, (47), 34 states have call predecessors, (47), 47 states have call successors, (47) [2024-09-20 19:00:28,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 290 transitions. [2024-09-20 19:00:28,618 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 290 transitions. Word has length 53 [2024-09-20 19:00:28,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:00:28,619 INFO L474 AbstractCegarLoop]: Abstraction has 238 states and 290 transitions. [2024-09-20 19:00:28,619 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 43 states have internal predecessors, (69), 19 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2024-09-20 19:00:28,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:28,619 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 290 transitions. [2024-09-20 19:00:28,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-20 19:00:28,620 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:00:28,620 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:00:28,635 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-20 19:00:28,820 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-20 19:00:28,821 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:00:28,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:00:28,821 INFO L85 PathProgramCache]: Analyzing trace with hash -978711902, now seen corresponding path program 8 times [2024-09-20 19:00:28,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:00:28,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855352539] [2024-09-20 19:00:28,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:00:28,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:00:28,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:29,888 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:00:29,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:29,922 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 19:00:29,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:29,927 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 19:00:29,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:29,930 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-20 19:00:29,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:29,935 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-20 19:00:29,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:29,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-20 19:00:29,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:00:29,942 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 19:00:29,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:00:29,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855352539] [2024-09-20 19:00:29,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855352539] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:00:29,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431848289] [2024-09-20 19:00:29,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:00:29,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:00:29,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:00:29,944 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:00:29,946 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 19:00:30,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:00:30,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:00:30,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-20 19:00:30,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:00:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 19:00:30,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:00:31,668 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 19:00:31,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431848289] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:00:31,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:00:31,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17, 17] total 51 [2024-09-20 19:00:31,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909131807] [2024-09-20 19:00:31,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:00:31,670 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-20 19:00:31,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:00:31,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-20 19:00:31,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=2360, Unknown=0, NotChecked=0, Total=2550 [2024-09-20 19:00:31,674 INFO L87 Difference]: Start difference. First operand 238 states and 290 transitions. Second operand has 51 states, 49 states have (on average 1.530612244897959) internal successors, (75), 48 states have internal predecessors, (75), 20 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2024-09-20 19:00:37,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 19:00:48,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 19:01:01,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 19:01:06,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 19:01:21,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 19:01:26,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 19:01:30,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 19:01:34,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 19:01:56,600 WARN L293 SmtUtils]: Spent 12.83s on a formula simplification. DAG size of input: 64 DAG size of output: 56 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 19:02:09,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 19:02:13,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []