./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/mono-crafted_6.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 de325976 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/mono-crafted_6.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 a0e1e4b700be1f29c3e51242b4a74b80feb10d65ba6788a48a42ab27b5c7017d --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-de32597-m [2024-09-18 15:45:18,792 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 15:45:18,854 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 15:45:18,859 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 15:45:18,859 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 15:45:18,882 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 15:45:18,883 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 15:45:18,883 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 15:45:18,883 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 15:45:18,884 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 15:45:18,885 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 15:45:18,885 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 15:45:18,886 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 15:45:18,887 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 15:45:18,887 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 15:45:18,888 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 15:45:18,888 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 15:45:18,888 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 15:45:18,888 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 15:45:18,888 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 15:45:18,888 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 15:45:18,891 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 15:45:18,891 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 15:45:18,891 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 15:45:18,892 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 15:45:18,892 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 15:45:18,892 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 15:45:18,892 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 15:45:18,892 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 15:45:18,892 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 15:45:18,893 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 15:45:18,893 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 15:45:18,893 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:45:18,893 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 15:45:18,893 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 15:45:18,893 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 15:45:18,893 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 15:45:18,894 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 15:45:18,894 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 15:45:18,894 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 15:45:18,894 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 15:45:18,895 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 15:45:18,896 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0e1e4b700be1f29c3e51242b4a74b80feb10d65ba6788a48a42ab27b5c7017d Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 15:45:19,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 15:45:19,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 15:45:19,107 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 15:45:19,108 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 15:45:19,109 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 15:45:19,109 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c [2024-09-18 15:45:20,458 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 15:45:20,590 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 15:45:20,590 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c [2024-09-18 15:45:20,598 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/ea62b0123/a6039ee44357425093ba8ca6bc01a7dd/FLAG0993685c3 [2024-09-18 15:45:21,005 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/ea62b0123/a6039ee44357425093ba8ca6bc01a7dd [2024-09-18 15:45:21,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 15:45:21,008 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 15:45:21,009 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 15:45:21,009 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 15:45:21,013 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 15:45:21,014 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:45:21" (1/1) ... [2024-09-18 15:45:21,014 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@391dbc00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:45:21, skipping insertion in model container [2024-09-18 15:45:21,014 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:45:21" (1/1) ... [2024-09-18 15:45:21,028 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 15:45:21,146 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/mono-crafted_6.c[318,331] [2024-09-18 15:45:21,164 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:45:21,174 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 15:45:21,186 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/mono-crafted_6.c[318,331] [2024-09-18 15:45:21,190 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:45:21,205 INFO L204 MainTranslator]: Completed translation [2024-09-18 15:45:21,205 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:45:21 WrapperNode [2024-09-18 15:45:21,205 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 15:45:21,207 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 15:45:21,207 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 15:45:21,207 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 15:45:21,213 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:45:21" (1/1) ... [2024-09-18 15:45:21,219 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:45:21" (1/1) ... [2024-09-18 15:45:21,224 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 15:45:21,225 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 15:45:21,226 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 15:45:21,226 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 15:45:21,226 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 15:45:21,234 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:45:21" (1/1) ... [2024-09-18 15:45:21,235 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:45:21" (1/1) ... [2024-09-18 15:45:21,235 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:45:21" (1/1) ... [2024-09-18 15:45:21,245 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-18 15:45:21,246 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:45:21" (1/1) ... [2024-09-18 15:45:21,246 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:45:21" (1/1) ... [2024-09-18 15:45:21,252 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:45:21" (1/1) ... [2024-09-18 15:45:21,255 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:45:21" (1/1) ... [2024-09-18 15:45:21,255 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:45:21" (1/1) ... [2024-09-18 15:45:21,256 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:45:21" (1/1) ... [2024-09-18 15:45:21,257 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 15:45:21,257 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 15:45:21,258 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 15:45:21,258 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 15:45:21,258 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:45:21" (1/1) ... [2024-09-18 15:45:21,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:45:21,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:45:21,287 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) [2024-09-18 15:45:21,289 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 [2024-09-18 15:45:21,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 15:45:21,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 15:45:21,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 15:45:21,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 15:45:21,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 15:45:21,332 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 15:45:21,332 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 15:45:21,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 15:45:21,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 15:45:21,333 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 15:45:21,385 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 15:45:21,387 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 15:45:21,502 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-18 15:45:21,502 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 15:45:21,523 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 15:45:21,523 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-18 15:45:21,524 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:45:21 BoogieIcfgContainer [2024-09-18 15:45:21,524 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 15:45:21,526 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 15:45:21,526 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 15:45:21,528 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 15:45:21,529 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 03:45:21" (1/3) ... [2024-09-18 15:45:21,529 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74c7983e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:45:21, skipping insertion in model container [2024-09-18 15:45:21,529 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:45:21" (2/3) ... [2024-09-18 15:45:21,530 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74c7983e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:45:21, skipping insertion in model container [2024-09-18 15:45:21,530 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:45:21" (3/3) ... [2024-09-18 15:45:21,531 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_6.c [2024-09-18 15:45:21,546 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 15:45:21,546 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 15:45:21,595 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 15:45:21,601 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;@a50177a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 15:45:21,601 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 15:45:21,604 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 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) [2024-09-18 15:45:21,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-18 15:45:21,610 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:45:21,610 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:45:21,611 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:45:21,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:21,615 INFO L85 PathProgramCache]: Analyzing trace with hash 2037564162, now seen corresponding path program 1 times [2024-09-18 15:45:21,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:45:21,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43642355] [2024-09-18 15:45:21,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:45:21,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:45:21,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:21,783 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:45:21,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:21,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:45:21,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:45:21,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43642355] [2024-09-18 15:45:21,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43642355] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:45:21,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:45:21,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-18 15:45:21,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383117880] [2024-09-18 15:45:21,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:45:21,800 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-18 15:45:21,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:45:21,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-18 15:45:21,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-18 15:45:21,822 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 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 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:21,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:45:21,867 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2024-09-18 15:45:21,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-18 15:45:21,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 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 10 [2024-09-18 15:45:21,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:45:21,877 INFO L225 Difference]: With dead ends: 37 [2024-09-18 15:45:21,878 INFO L226 Difference]: Without dead ends: 16 [2024-09-18 15:45:21,880 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-18 15:45:21,884 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:45:21,885 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 31 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:45:21,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-18 15:45:21,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-18 15:45:21,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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) [2024-09-18 15:45:21,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2024-09-18 15:45:21,943 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2024-09-18 15:45:21,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:45:21,944 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2024-09-18 15:45:21,944 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:21,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:21,945 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2024-09-18 15:45:21,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-18 15:45:21,946 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:45:21,946 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:45:21,946 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-18 15:45:21,947 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:45:21,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:21,947 INFO L85 PathProgramCache]: Analyzing trace with hash 432983647, now seen corresponding path program 1 times [2024-09-18 15:45:21,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:45:21,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491697782] [2024-09-18 15:45:21,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:45:21,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:45:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:22,088 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:45:22,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:45:22,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:45:22,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491697782] [2024-09-18 15:45:22,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491697782] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:45:22,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737815491] [2024-09-18 15:45:22,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:45:22,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:45:22,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:45:22,108 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) [2024-09-18 15:45:22,110 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-18 15:45:22,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:22,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-18 15:45:22,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:45:22,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:45:22,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:45:22,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:45:22,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737815491] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:45:22,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:45:22,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-09-18 15:45:22,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333680424] [2024-09-18 15:45:22,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:45:22,262 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-18 15:45:22,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:45:22,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-18 15:45:22,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-09-18 15:45:22,265 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:22,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:45:22,314 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2024-09-18 15:45:22,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-18 15:45:22,315 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 2 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 12 [2024-09-18 15:45:22,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:45:22,317 INFO L225 Difference]: With dead ends: 31 [2024-09-18 15:45:22,317 INFO L226 Difference]: Without dead ends: 22 [2024-09-18 15:45:22,318 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-09-18 15:45:22,320 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:45:22,320 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 26 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:45:22,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-18 15:45:22,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2024-09-18 15:45:22,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 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) [2024-09-18 15:45:22,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2024-09-18 15:45:22,327 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2024-09-18 15:45:22,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:45:22,328 INFO L474 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2024-09-18 15:45:22,328 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:22,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:22,328 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2024-09-18 15:45:22,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-18 15:45:22,329 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:45:22,329 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:45:22,342 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-18 15:45:22,530 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 [2024-09-18 15:45:22,531 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:45:22,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:22,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1116068651, now seen corresponding path program 1 times [2024-09-18 15:45:22,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:45:22,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134213118] [2024-09-18 15:45:22,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:45:22,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:45:22,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:22,632 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:45:22,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:22,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:45:22,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:45:22,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134213118] [2024-09-18 15:45:22,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134213118] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:45:22,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631274193] [2024-09-18 15:45:22,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:45:22,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:45:22,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:45:22,645 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) [2024-09-18 15:45:22,646 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-18 15:45:22,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:22,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-18 15:45:22,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:45:22,704 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:45:22,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:45:22,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:45:22,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631274193] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:45:22,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:45:22,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-09-18 15:45:22,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104650490] [2024-09-18 15:45:22,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:45:22,749 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-18 15:45:22,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:45:22,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-18 15:45:22,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-09-18 15:45:22,752 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:22,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:45:22,809 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2024-09-18 15:45:22,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-18 15:45:22,810 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 2 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 18 [2024-09-18 15:45:22,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:45:22,811 INFO L225 Difference]: With dead ends: 44 [2024-09-18 15:45:22,811 INFO L226 Difference]: Without dead ends: 33 [2024-09-18 15:45:22,811 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-09-18 15:45:22,812 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:45:22,812 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 36 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:45:22,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-18 15:45:22,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-09-18 15:45:22,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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) [2024-09-18 15:45:22,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2024-09-18 15:45:22,818 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 18 [2024-09-18 15:45:22,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:45:22,819 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2024-09-18 15:45:22,819 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:22,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:22,820 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2024-09-18 15:45:22,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-18 15:45:22,821 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:45:22,821 INFO L216 NwaCegarLoop]: trace histogram [7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:45:22,838 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-18 15:45:23,025 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 [2024-09-18 15:45:23,026 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:45:23,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:23,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1180634569, now seen corresponding path program 1 times [2024-09-18 15:45:23,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:45:23,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901805343] [2024-09-18 15:45:23,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:45:23,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:45:23,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:23,153 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:45:23,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:23,158 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-18 15:45:23,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:45:23,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901805343] [2024-09-18 15:45:23,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901805343] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:45:23,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150175732] [2024-09-18 15:45:23,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:45:23,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:45:23,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:45:23,161 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) [2024-09-18 15:45:23,162 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-18 15:45:23,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:23,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-18 15:45:23,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:45:23,216 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-18 15:45:23,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:45:23,261 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-18 15:45:23,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150175732] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:45:23,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:45:23,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-09-18 15:45:23,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477256438] [2024-09-18 15:45:23,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:45:23,262 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-18 15:45:23,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:45:23,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-18 15:45:23,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2024-09-18 15:45:23,264 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:23,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:45:23,308 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2024-09-18 15:45:23,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-18 15:45:23,310 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 2 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 32 [2024-09-18 15:45:23,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:45:23,311 INFO L225 Difference]: With dead ends: 65 [2024-09-18 15:45:23,311 INFO L226 Difference]: Without dead ends: 43 [2024-09-18 15:45:23,311 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2024-09-18 15:45:23,312 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:45:23,314 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:45:23,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-18 15:45:23,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-09-18 15:45:23,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 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) [2024-09-18 15:45:23,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2024-09-18 15:45:23,322 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 32 [2024-09-18 15:45:23,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:45:23,323 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2024-09-18 15:45:23,323 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:23,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:23,323 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2024-09-18 15:45:23,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-18 15:45:23,324 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:45:23,325 INFO L216 NwaCegarLoop]: trace histogram [12, 8, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:45:23,339 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-18 15:45:23,526 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 [2024-09-18 15:45:23,527 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:45:23,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:23,527 INFO L85 PathProgramCache]: Analyzing trace with hash 990963656, now seen corresponding path program 2 times [2024-09-18 15:45:23,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:45:23,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495014468] [2024-09-18 15:45:23,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:45:23,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:45:23,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:23,722 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:45:23,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:23,725 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 63 proven. 72 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-18 15:45:23,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:45:23,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495014468] [2024-09-18 15:45:23,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495014468] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:45:23,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541647338] [2024-09-18 15:45:23,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:45:23,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:45:23,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:45:23,728 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) [2024-09-18 15:45:23,733 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-18 15:45:23,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:45:23,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:45:23,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-18 15:45:23,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:45:23,836 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 63 proven. 72 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-18 15:45:23,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:45:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 63 proven. 72 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-18 15:45:24,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541647338] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:45:24,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:45:24,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2024-09-18 15:45:24,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207089937] [2024-09-18 15:45:24,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:45:24,016 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-18 15:45:24,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:45:24,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-18 15:45:24,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2024-09-18 15:45:24,017 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:24,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:45:24,083 INFO L93 Difference]: Finished difference Result 85 states and 105 transitions. [2024-09-18 15:45:24,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-18 15:45:24,084 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (3), 2 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 42 [2024-09-18 15:45:24,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:45:24,086 INFO L225 Difference]: With dead ends: 85 [2024-09-18 15:45:24,087 INFO L226 Difference]: Without dead ends: 63 [2024-09-18 15:45:24,087 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2024-09-18 15:45:24,088 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:45:24,089 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:45:24,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-18 15:45:24,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-18 15:45:24,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.103448275862069) internal successors, (64), 58 states have internal predecessors, (64), 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) [2024-09-18 15:45:24,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2024-09-18 15:45:24,108 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 42 [2024-09-18 15:45:24,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:45:24,108 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2024-09-18 15:45:24,108 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:24,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:24,109 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2024-09-18 15:45:24,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-18 15:45:24,110 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:45:24,110 INFO L216 NwaCegarLoop]: trace histogram [22, 18, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:45:24,122 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-18 15:45:24,310 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 [2024-09-18 15:45:24,310 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:45:24,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:24,311 INFO L85 PathProgramCache]: Analyzing trace with hash 736255786, now seen corresponding path program 3 times [2024-09-18 15:45:24,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:45:24,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121971507] [2024-09-18 15:45:24,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:45:24,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:45:24,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:24,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:45:24,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:24,743 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 133 proven. 342 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-18 15:45:24,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:45:24,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121971507] [2024-09-18 15:45:24,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121971507] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:45:24,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225491934] [2024-09-18 15:45:24,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:45:24,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:45:24,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:45:24,747 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) [2024-09-18 15:45:24,748 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-18 15:45:24,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-18 15:45:24,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:45:24,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-18 15:45:24,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:45:24,840 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 70 proven. 2 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2024-09-18 15:45:24,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:45:24,903 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 70 proven. 2 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2024-09-18 15:45:24,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225491934] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:45:24,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:45:24,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 4, 4] total 25 [2024-09-18 15:45:24,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88692204] [2024-09-18 15:45:24,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:45:24,904 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-18 15:45:24,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:45:24,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-18 15:45:24,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-09-18 15:45:24,905 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:24,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:45:24,994 INFO L93 Difference]: Finished difference Result 99 states and 119 transitions. [2024-09-18 15:45:24,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-18 15:45:24,995 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 2 states have call successors, (3), 2 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 62 [2024-09-18 15:45:24,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:45:24,996 INFO L225 Difference]: With dead ends: 99 [2024-09-18 15:45:24,996 INFO L226 Difference]: Without dead ends: 77 [2024-09-18 15:45:24,997 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-09-18 15:45:24,998 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:45:24,999 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 44 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:45:24,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-18 15:45:25,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-09-18 15:45:25,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 72 states have internal predecessors, (84), 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) [2024-09-18 15:45:25,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2024-09-18 15:45:25,016 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 62 [2024-09-18 15:45:25,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:45:25,016 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2024-09-18 15:45:25,016 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:25,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:25,017 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2024-09-18 15:45:25,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-09-18 15:45:25,018 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:45:25,018 INFO L216 NwaCegarLoop]: trace histogram [26, 19, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:45:25,030 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-18 15:45:25,218 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 [2024-09-18 15:45:25,219 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:45:25,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:25,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1584478994, now seen corresponding path program 4 times [2024-09-18 15:45:25,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:45:25,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129272064] [2024-09-18 15:45:25,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:45:25,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:45:25,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:25,629 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:45:25,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:25,633 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 260 proven. 380 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-18 15:45:25,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:45:25,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129272064] [2024-09-18 15:45:25,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129272064] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:45:25,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763648407] [2024-09-18 15:45:25,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:45:25,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:45:25,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:45:25,635 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) [2024-09-18 15:45:25,636 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-18 15:45:25,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:45:25,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:45:25,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-18 15:45:25,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:45:25,763 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 260 proven. 380 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-18 15:45:25,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:45:26,310 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 260 proven. 380 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-18 15:45:26,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763648407] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:45:26,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:45:26,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 43 [2024-09-18 15:45:26,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724632987] [2024-09-18 15:45:26,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:45:26,311 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-09-18 15:45:26,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:45:26,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-09-18 15:45:26,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2024-09-18 15:45:26,313 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:26,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:45:26,458 INFO L93 Difference]: Finished difference Result 153 states and 196 transitions. [2024-09-18 15:45:26,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-09-18 15:45:26,458 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 2 states have call successors, (3), 2 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 76 [2024-09-18 15:45:26,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:45:26,459 INFO L225 Difference]: With dead ends: 153 [2024-09-18 15:45:26,459 INFO L226 Difference]: Without dead ends: 119 [2024-09-18 15:45:26,460 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2024-09-18 15:45:26,462 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:45:26,463 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:45:26,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-09-18 15:45:26,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2024-09-18 15:45:26,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.105263157894737) internal successors, (126), 114 states have internal predecessors, (126), 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) [2024-09-18 15:45:26,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 130 transitions. [2024-09-18 15:45:26,481 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 130 transitions. Word has length 76 [2024-09-18 15:45:26,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:45:26,483 INFO L474 AbstractCegarLoop]: Abstraction has 119 states and 130 transitions. [2024-09-18 15:45:26,483 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:26,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:26,484 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 130 transitions. [2024-09-18 15:45:26,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-09-18 15:45:26,486 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:45:26,486 INFO L216 NwaCegarLoop]: trace histogram [47, 40, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:45:26,499 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-18 15:45:26,686 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 [2024-09-18 15:45:26,687 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:45:26,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:26,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1073042163, now seen corresponding path program 5 times [2024-09-18 15:45:26,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:45:26,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421358657] [2024-09-18 15:45:26,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:45:26,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:45:26,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:27,958 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:45:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:27,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 533 proven. 1640 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-18 15:45:27,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:45:27,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421358657] [2024-09-18 15:45:27,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421358657] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:45:27,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096941576] [2024-09-18 15:45:27,962 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:45:27,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:45:27,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:45:27,965 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) [2024-09-18 15:45:27,966 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-18 15:45:28,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2024-09-18 15:45:28,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:45:28,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-18 15:45:28,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:45:28,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 1292 proven. 389 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2024-09-18 15:45:28,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:45:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 1292 proven. 389 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2024-09-18 15:45:29,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096941576] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:45:29,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:45:29,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 22, 22] total 83 [2024-09-18 15:45:29,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756115222] [2024-09-18 15:45:29,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:45:29,666 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-09-18 15:45:29,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:45:29,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-09-18 15:45:29,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2024-09-18 15:45:29,670 INFO L87 Difference]: Start difference. First operand 119 states and 130 transitions. Second operand has 83 states, 83 states have (on average 2.3132530120481927) internal successors, (192), 83 states have internal predecessors, (192), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:30,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:45:30,048 INFO L93 Difference]: Finished difference Result 303 states and 400 transitions. [2024-09-18 15:45:30,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-09-18 15:45:30,048 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.3132530120481927) internal successors, (192), 83 states have internal predecessors, (192), 2 states have call successors, (3), 2 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 118 [2024-09-18 15:45:30,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:45:30,051 INFO L225 Difference]: With dead ends: 303 [2024-09-18 15:45:30,051 INFO L226 Difference]: Without dead ends: 269 [2024-09-18 15:45:30,053 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2024-09-18 15:45:30,053 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 137 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:45:30,053 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 66 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:45:30,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2024-09-18 15:45:30,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2024-09-18 15:45:30,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 264 states have (on average 1.1856060606060606) internal successors, (313), 264 states have internal predecessors, (313), 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) [2024-09-18 15:45:30,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 317 transitions. [2024-09-18 15:45:30,085 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 317 transitions. Word has length 118 [2024-09-18 15:45:30,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:45:30,085 INFO L474 AbstractCegarLoop]: Abstraction has 269 states and 317 transitions. [2024-09-18 15:45:30,085 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.3132530120481927) internal successors, (192), 83 states have internal predecessors, (192), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:30,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:30,086 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 317 transitions. [2024-09-18 15:45:30,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2024-09-18 15:45:30,088 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:45:30,088 INFO L216 NwaCegarLoop]: trace histogram [85, 44, 44, 41, 40, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:45:30,100 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-18 15:45:30,292 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 [2024-09-18 15:45:30,293 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:45:30,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:30,293 INFO L85 PathProgramCache]: Analyzing trace with hash 2107848675, now seen corresponding path program 6 times [2024-09-18 15:45:30,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:45:30,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130526851] [2024-09-18 15:45:30,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:45:30,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:45:30,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:31,913 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:45:31,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:31,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9117 backedges. 3654 proven. 1722 refuted. 0 times theorem prover too weak. 3741 trivial. 0 not checked. [2024-09-18 15:45:31,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:45:31,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130526851] [2024-09-18 15:45:31,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130526851] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:45:31,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029109083] [2024-09-18 15:45:31,918 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:45:31,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:45:31,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:45:31,920 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) [2024-09-18 15:45:31,921 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-18 15:45:32,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-09-18 15:45:32,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:45:32,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-18 15:45:32,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:45:32,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9117 backedges. 1084 proven. 32 refuted. 0 times theorem prover too weak. 8001 trivial. 0 not checked. [2024-09-18 15:45:32,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:45:32,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9117 backedges. 1084 proven. 32 refuted. 0 times theorem prover too weak. 8001 trivial. 0 not checked. [2024-09-18 15:45:32,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029109083] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:45:32,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:45:32,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 7, 7] total 54 [2024-09-18 15:45:32,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535976728] [2024-09-18 15:45:32,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:45:32,313 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-09-18 15:45:32,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:45:32,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-09-18 15:45:32,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2024-09-18 15:45:32,317 INFO L87 Difference]: Start difference. First operand 269 states and 317 transitions. Second operand has 54 states, 54 states have (on average 2.574074074074074) internal successors, (139), 54 states have internal predecessors, (139), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:32,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:45:32,449 INFO L93 Difference]: Finished difference Result 477 states and 592 transitions. [2024-09-18 15:45:32,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-09-18 15:45:32,450 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.574074074074074) internal successors, (139), 54 states have internal predecessors, (139), 2 states have call successors, (3), 2 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 268 [2024-09-18 15:45:32,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:45:32,451 INFO L225 Difference]: With dead ends: 477 [2024-09-18 15:45:32,451 INFO L226 Difference]: Without dead ends: 295 [2024-09-18 15:45:32,453 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 529 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2024-09-18 15:45:32,453 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:45:32,453 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 45 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:45:32,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2024-09-18 15:45:32,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2024-09-18 15:45:32,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 290 states have (on average 1.210344827586207) internal successors, (351), 290 states have internal predecessors, (351), 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) [2024-09-18 15:45:32,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 355 transitions. [2024-09-18 15:45:32,467 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 355 transitions. Word has length 268 [2024-09-18 15:45:32,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:45:32,467 INFO L474 AbstractCegarLoop]: Abstraction has 295 states and 355 transitions. [2024-09-18 15:45:32,467 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.574074074074074) internal successors, (139), 54 states have internal predecessors, (139), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:32,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:32,468 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 355 transitions. [2024-09-18 15:45:32,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2024-09-18 15:45:32,470 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:45:32,470 INFO L216 NwaCegarLoop]: trace histogram [92, 50, 50, 42, 40, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:45:32,482 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-18 15:45:32,670 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 [2024-09-18 15:45:32,671 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:45:32,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:32,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1689622166, now seen corresponding path program 7 times [2024-09-18 15:45:32,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:45:32,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806429849] [2024-09-18 15:45:32,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:45:32,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:45:32,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:34,367 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:45:34,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:34,372 INFO L134 CoverageAnalysis]: Checked inductivity of 10914 backedges. 4257 proven. 1806 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2024-09-18 15:45:34,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:45:34,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806429849] [2024-09-18 15:45:34,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806429849] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:45:34,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031361437] [2024-09-18 15:45:34,373 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 15:45:34,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:45:34,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:45:34,374 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) [2024-09-18 15:45:34,375 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-18 15:45:34,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:34,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-09-18 15:45:34,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:45:34,631 INFO L134 CoverageAnalysis]: Checked inductivity of 10914 backedges. 4257 proven. 1806 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2024-09-18 15:45:34,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:45:36,282 INFO L134 CoverageAnalysis]: Checked inductivity of 10914 backedges. 4257 proven. 1806 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2024-09-18 15:45:36,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031361437] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:45:36,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:45:36,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 89 [2024-09-18 15:45:36,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492372806] [2024-09-18 15:45:36,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:45:36,283 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2024-09-18 15:45:36,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:45:36,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2024-09-18 15:45:36,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2024-09-18 15:45:36,286 INFO L87 Difference]: Start difference. First operand 295 states and 355 transitions. Second operand has 89 states, 89 states have (on average 2.101123595505618) internal successors, (187), 89 states have internal predecessors, (187), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:36,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:45:36,507 INFO L93 Difference]: Finished difference Result 589 states and 753 transitions. [2024-09-18 15:45:36,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-09-18 15:45:36,508 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.101123595505618) internal successors, (187), 89 states have internal predecessors, (187), 2 states have call successors, (3), 2 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 294 [2024-09-18 15:45:36,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:45:36,510 INFO L225 Difference]: With dead ends: 589 [2024-09-18 15:45:36,510 INFO L226 Difference]: Without dead ends: 383 [2024-09-18 15:45:36,514 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 547 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2024-09-18 15:45:36,514 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:45:36,515 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:45:36,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2024-09-18 15:45:36,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2024-09-18 15:45:36,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 378 states have (on average 1.1613756613756614) internal successors, (439), 378 states have internal predecessors, (439), 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) [2024-09-18 15:45:36,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 443 transitions. [2024-09-18 15:45:36,534 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 443 transitions. Word has length 294 [2024-09-18 15:45:36,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:45:36,534 INFO L474 AbstractCegarLoop]: Abstraction has 383 states and 443 transitions. [2024-09-18 15:45:36,534 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.101123595505618) internal successors, (187), 89 states have internal predecessors, (187), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:36,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:36,535 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 443 transitions. [2024-09-18 15:45:36,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2024-09-18 15:45:36,538 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:45:36,538 INFO L216 NwaCegarLoop]: trace histogram [136, 86, 50, 50, 40, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:45:36,553 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-18 15:45:36,738 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 [2024-09-18 15:45:36,739 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:45:36,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:36,739 INFO L85 PathProgramCache]: Analyzing trace with hash -979945966, now seen corresponding path program 8 times [2024-09-18 15:45:36,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:45:36,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45159765] [2024-09-18 15:45:36,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:45:36,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:45:36,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:41,896 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:45:41,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:41,899 INFO L134 CoverageAnalysis]: Checked inductivity of 20946 backedges. 8613 proven. 7482 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2024-09-18 15:45:41,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:45:41,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45159765] [2024-09-18 15:45:41,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45159765] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:45:41,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585364945] [2024-09-18 15:45:41,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:45:41,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:45:41,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:45:41,901 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) [2024-09-18 15:45:41,902 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-18 15:45:42,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:45:42,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:45:42,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 910 conjuncts, 174 conjuncts are in the unsatisfiable core [2024-09-18 15:45:42,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:45:42,230 INFO L134 CoverageAnalysis]: Checked inductivity of 20946 backedges. 8613 proven. 7482 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2024-09-18 15:45:42,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:45:48,311 INFO L134 CoverageAnalysis]: Checked inductivity of 20946 backedges. 8613 proven. 7482 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2024-09-18 15:45:48,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585364945] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:45:48,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:45:48,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89, 89] total 177 [2024-09-18 15:45:48,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200943687] [2024-09-18 15:45:48,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:45:48,313 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 177 states [2024-09-18 15:45:48,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:45:48,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2024-09-18 15:45:48,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15576, Invalid=15576, Unknown=0, NotChecked=0, Total=31152 [2024-09-18 15:45:48,322 INFO L87 Difference]: Start difference. First operand 383 states and 443 transitions. Second operand has 177 states, 177 states have (on average 2.0508474576271185) internal successors, (363), 177 states have internal predecessors, (363), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:48,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:45:48,803 INFO L93 Difference]: Finished difference Result 765 states and 973 transitions. [2024-09-18 15:45:48,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2024-09-18 15:45:48,804 INFO L78 Accepts]: Start accepts. Automaton has has 177 states, 177 states have (on average 2.0508474576271185) internal successors, (363), 177 states have internal predecessors, (363), 2 states have call successors, (3), 2 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 382 [2024-09-18 15:45:48,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:45:48,806 INFO L225 Difference]: With dead ends: 765 [2024-09-18 15:45:48,806 INFO L226 Difference]: Without dead ends: 559 [2024-09-18 15:45:48,807 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 854 GetRequests, 679 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=15576, Invalid=15576, Unknown=0, NotChecked=0, Total=31152 [2024-09-18 15:45:48,808 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:45:48,808 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:45:48,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2024-09-18 15:45:48,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2024-09-18 15:45:48,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 554 states have (on average 1.1101083032490975) internal successors, (615), 554 states have internal predecessors, (615), 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) [2024-09-18 15:45:48,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 619 transitions. [2024-09-18 15:45:48,829 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 619 transitions. Word has length 382 [2024-09-18 15:45:48,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:45:48,829 INFO L474 AbstractCegarLoop]: Abstraction has 559 states and 619 transitions. [2024-09-18 15:45:48,829 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 177 states, 177 states have (on average 2.0508474576271185) internal successors, (363), 177 states have internal predecessors, (363), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:48,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:48,830 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 619 transitions. [2024-09-18 15:45:48,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2024-09-18 15:45:48,834 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:45:48,835 INFO L216 NwaCegarLoop]: trace histogram [224, 174, 50, 50, 40, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:45:48,848 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-18 15:45:49,038 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 [2024-09-18 15:45:49,039 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:45:49,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:49,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1825683722, now seen corresponding path program 9 times [2024-09-18 15:45:49,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:45:49,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74618422] [2024-09-18 15:45:49,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:45:49,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:45:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:46:11,425 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:46:11,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:46:11,431 INFO L134 CoverageAnalysis]: Checked inductivity of 52626 backedges. 17325 proven. 30450 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2024-09-18 15:46:11,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:46:11,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74618422] [2024-09-18 15:46:11,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74618422] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:46:11,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306554173] [2024-09-18 15:46:11,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:46:11,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:46:11,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:46:11,433 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) [2024-09-18 15:46:11,434 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-18 15:46:11,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2024-09-18 15:46:11,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:46:11,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-18 15:46:11,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:46:12,564 INFO L134 CoverageAnalysis]: Checked inductivity of 52626 backedges. 5323 proven. 200 refuted. 0 times theorem prover too weak. 47103 trivial. 0 not checked. [2024-09-18 15:46:12,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:46:13,650 INFO L134 CoverageAnalysis]: Checked inductivity of 52626 backedges. 5323 proven. 200 refuted. 0 times theorem prover too weak. 47103 trivial. 0 not checked. [2024-09-18 15:46:13,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306554173] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:46:13,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:46:13,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [177, 13, 13] total 199 [2024-09-18 15:46:13,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750055789] [2024-09-18 15:46:13,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:46:13,652 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 199 states [2024-09-18 15:46:13,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:46:13,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 199 interpolants. [2024-09-18 15:46:13,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19701, Invalid=19701, Unknown=0, NotChecked=0, Total=39402 [2024-09-18 15:46:13,660 INFO L87 Difference]: Start difference. First operand 559 states and 619 transitions. Second operand has 199 states, 199 states have (on average 2.2763819095477387) internal successors, (453), 199 states have internal predecessors, (453), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:46:14,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:46:14,678 INFO L93 Difference]: Finished difference Result 815 states and 972 transitions. [2024-09-18 15:46:14,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2024-09-18 15:46:14,678 INFO L78 Accepts]: Start accepts. Automaton has has 199 states, 199 states have (on average 2.2763819095477387) internal successors, (453), 199 states have internal predecessors, (453), 2 states have call successors, (3), 2 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 558 [2024-09-18 15:46:14,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:46:14,681 INFO L225 Difference]: With dead ends: 815 [2024-09-18 15:46:14,681 INFO L226 Difference]: Without dead ends: 609 [2024-09-18 15:46:14,683 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 1294 GetRequests, 1097 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=19701, Invalid=19701, Unknown=0, NotChecked=0, Total=39402 [2024-09-18 15:46:14,683 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:46:14,684 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 80 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:46:14,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2024-09-18 15:46:14,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 609. [2024-09-18 15:46:14,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 604 states have (on average 1.140728476821192) internal successors, (689), 604 states have internal predecessors, (689), 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) [2024-09-18 15:46:14,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 693 transitions. [2024-09-18 15:46:14,707 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 693 transitions. Word has length 558 [2024-09-18 15:46:14,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:46:14,708 INFO L474 AbstractCegarLoop]: Abstraction has 609 states and 693 transitions. [2024-09-18 15:46:14,708 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 199 states, 199 states have (on average 2.2763819095477387) internal successors, (453), 199 states have internal predecessors, (453), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:46:14,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:46:14,709 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 693 transitions. [2024-09-18 15:46:14,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2024-09-18 15:46:14,711 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:46:14,711 INFO L216 NwaCegarLoop]: trace histogram [237, 175, 62, 62, 40, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:46:14,723 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-18 15:46:14,915 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:46:14,915 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:46:14,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:46:14,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1149410067, now seen corresponding path program 10 times [2024-09-18 15:46:14,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:46:14,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418062557] [2024-09-18 15:46:14,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:46:14,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:46:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:46:38,505 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:46:38,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:46:38,510 INFO L134 CoverageAnalysis]: Checked inductivity of 59951 backedges. 21648 proven. 30800 refuted. 0 times theorem prover too weak. 7503 trivial. 0 not checked. [2024-09-18 15:46:38,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:46:38,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418062557] [2024-09-18 15:46:38,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418062557] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:46:38,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739568481] [2024-09-18 15:46:38,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:46:38,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:46:38,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:46:38,513 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:46:38,514 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-18 15:46:38,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:46:38,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:46:38,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 1528 conjuncts, 352 conjuncts are in the unsatisfiable core [2024-09-18 15:46:38,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:46:39,107 INFO L134 CoverageAnalysis]: Checked inductivity of 59951 backedges. 21648 proven. 30800 refuted. 0 times theorem prover too weak. 7503 trivial. 0 not checked. [2024-09-18 15:46:39,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:47:02,715 INFO L134 CoverageAnalysis]: Checked inductivity of 59951 backedges. 21648 proven. 30800 refuted. 0 times theorem prover too weak. 7503 trivial. 0 not checked. [2024-09-18 15:47:02,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739568481] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:47:02,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:47:02,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [178, 178, 178] total 355 [2024-09-18 15:47:02,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971291348] [2024-09-18 15:47:02,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:47:02,716 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 355 states [2024-09-18 15:47:02,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:47:02,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 355 interpolants. [2024-09-18 15:47:02,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62835, Invalid=62835, Unknown=0, NotChecked=0, Total=125670 [2024-09-18 15:47:02,731 INFO L87 Difference]: Start difference. First operand 609 states and 693 transitions. Second operand has 355 states, 355 states have (on average 2.0253521126760563) internal successors, (719), 355 states have internal predecessors, (719), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:47:05,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:47:05,461 INFO L93 Difference]: Finished difference Result 1217 states and 1562 transitions. [2024-09-18 15:47:05,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 354 states. [2024-09-18 15:47:05,462 INFO L78 Accepts]: Start accepts. Automaton has has 355 states, 355 states have (on average 2.0253521126760563) internal successors, (719), 355 states have internal predecessors, (719), 2 states have call successors, (3), 2 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 608 [2024-09-18 15:47:05,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:47:05,466 INFO L225 Difference]: With dead ends: 1217 [2024-09-18 15:47:05,466 INFO L226 Difference]: Without dead ends: 963 [2024-09-18 15:47:05,470 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 1395 GetRequests, 1042 SyntacticMatches, 0 SemanticMatches, 353 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=62835, Invalid=62835, Unknown=0, NotChecked=0, Total=125670 [2024-09-18 15:47:05,471 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-18 15:47:05,471 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-18 15:47:05,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2024-09-18 15:47:05,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 963. [2024-09-18 15:47:05,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 958 states have (on average 1.0887265135699373) internal successors, (1043), 958 states have internal predecessors, (1043), 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) [2024-09-18 15:47:05,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1047 transitions. [2024-09-18 15:47:05,516 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1047 transitions. Word has length 608 [2024-09-18 15:47:05,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:47:05,516 INFO L474 AbstractCegarLoop]: Abstraction has 963 states and 1047 transitions. [2024-09-18 15:47:05,517 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 355 states, 355 states have (on average 2.0253521126760563) internal successors, (719), 355 states have internal predecessors, (719), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:47:05,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:05,517 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1047 transitions. [2024-09-18 15:47:05,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 963 [2024-09-18 15:47:05,524 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:47:05,524 INFO L216 NwaCegarLoop]: trace histogram [414, 352, 62, 62, 40, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:47:05,539 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-18 15:47:05,724 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-18 15:47:05,725 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:47:05,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:05,725 INFO L85 PathProgramCache]: Analyzing trace with hash 222980256, now seen corresponding path program 11 times [2024-09-18 15:47:05,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:47:05,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818475458] [2024-09-18 15:47:05,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:47:05,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:47:06,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:08,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:49:08,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:49:08,612 INFO L134 CoverageAnalysis]: Checked inductivity of 175178 backedges. 43419 proven. 124256 refuted. 0 times theorem prover too weak. 7503 trivial. 0 not checked. [2024-09-18 15:49:08,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:49:08,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818475458] [2024-09-18 15:49:08,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818475458] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:49:08,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691561806] [2024-09-18 15:49:08,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:49:08,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:49:08,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:49:08,614 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:49:08,615 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-18 15:49:11,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 372 check-sat command(s) [2024-09-18 15:49:11,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:49:11,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 2275 conjuncts, 334 conjuncts are in the unsatisfiable core [2024-09-18 15:49:11,236 INFO L285 TraceCheckSpWp]: Computing forward predicates...