./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.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 e378df2c Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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/nla-digbench-scaling/egcd3-ll_valuebound20.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 39b854852f8258ff198098e27d83a5b0e296df48090ebea0d59d234417af0752 --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 0.2.5-wip.dk.contract-modifies-e378df2-m [2024-10-15 14:48:08,982 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-15 14:48:09,031 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-15 14:48:09,037 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-15 14:48:09,038 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-15 14:48:09,060 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-15 14:48:09,060 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-15 14:48:09,061 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-15 14:48:09,062 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-15 14:48:09,062 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-15 14:48:09,063 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-15 14:48:09,063 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-15 14:48:09,064 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-15 14:48:09,064 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-15 14:48:09,065 INFO L153 SettingsManager]: * Use SBE=true [2024-10-15 14:48:09,066 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-15 14:48:09,066 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-15 14:48:09,066 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-15 14:48:09,066 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-15 14:48:09,066 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-15 14:48:09,067 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-15 14:48:09,069 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-15 14:48:09,069 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-15 14:48:09,069 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-15 14:48:09,069 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-15 14:48:09,069 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-15 14:48:09,070 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-15 14:48:09,070 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-15 14:48:09,070 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-15 14:48:09,070 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-15 14:48:09,070 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-15 14:48:09,070 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-15 14:48:09,071 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 14:48:09,071 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-15 14:48:09,071 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-15 14:48:09,071 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-15 14:48:09,071 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-15 14:48:09,071 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-15 14:48:09,072 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-15 14:48:09,072 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-15 14:48:09,072 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-15 14:48:09,072 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-15 14:48:09,072 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39b854852f8258ff198098e27d83a5b0e296df48090ebea0d59d234417af0752 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-10-15 14:48:09,258 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-15 14:48:09,277 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-15 14:48:09,279 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-15 14:48:09,280 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-15 14:48:09,280 INFO L274 PluginConnector]: CDTParser initialized [2024-10-15 14:48:09,281 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c [2024-10-15 14:48:10,479 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-15 14:48:10,615 INFO L384 CDTParser]: Found 1 translation units. [2024-10-15 14:48:10,619 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c [2024-10-15 14:48:10,626 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/97d644e32/de936675989145699430147ddac4cd6c/FLAG2c177dc41 [2024-10-15 14:48:11,036 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/97d644e32/de936675989145699430147ddac4cd6c [2024-10-15 14:48:11,038 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-15 14:48:11,039 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-15 14:48:11,041 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-15 14:48:11,041 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-15 14:48:11,049 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-15 14:48:11,050 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:48:11" (1/1) ... [2024-10-15 14:48:11,050 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@170d242c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:11, skipping insertion in model container [2024-10-15 14:48:11,050 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:48:11" (1/1) ... [2024-10-15 14:48:11,065 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-15 14:48:11,192 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/nla-digbench-scaling/egcd3-ll_valuebound20.c[490,503] [2024-10-15 14:48:11,211 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 14:48:11,218 INFO L200 MainTranslator]: Completed pre-run [2024-10-15 14:48:11,226 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/nla-digbench-scaling/egcd3-ll_valuebound20.c[490,503] [2024-10-15 14:48:11,238 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 14:48:11,249 INFO L204 MainTranslator]: Completed translation [2024-10-15 14:48:11,250 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:11 WrapperNode [2024-10-15 14:48:11,250 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-15 14:48:11,251 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-15 14:48:11,251 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-15 14:48:11,251 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-15 14:48:11,255 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:11" (1/1) ... [2024-10-15 14:48:11,261 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:11" (1/1) ... [2024-10-15 14:48:11,266 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-10-15 14:48:11,266 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-15 14:48:11,267 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-15 14:48:11,267 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-15 14:48:11,268 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-15 14:48:11,278 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:11" (1/1) ... [2024-10-15 14:48:11,278 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:11" (1/1) ... [2024-10-15 14:48:11,279 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:11" (1/1) ... [2024-10-15 14:48:11,287 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]. [2024-10-15 14:48:11,288 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:11" (1/1) ... [2024-10-15 14:48:11,288 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:11" (1/1) ... [2024-10-15 14:48:11,290 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:11" (1/1) ... [2024-10-15 14:48:11,293 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:11" (1/1) ... [2024-10-15 14:48:11,294 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:11" (1/1) ... [2024-10-15 14:48:11,294 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:11" (1/1) ... [2024-10-15 14:48:11,295 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-15 14:48:11,296 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-15 14:48:11,296 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-15 14:48:11,296 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-15 14:48:11,297 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:11" (1/1) ... [2024-10-15 14:48:11,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 14:48:11,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:11,318 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) [2024-10-15 14:48:11,320 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 [2024-10-15 14:48:11,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-15 14:48:11,349 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-15 14:48:11,349 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-15 14:48:11,349 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-10-15 14:48:11,349 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-10-15 14:48:11,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-15 14:48:11,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-10-15 14:48:11,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-10-15 14:48:11,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-15 14:48:11,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-15 14:48:11,350 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-15 14:48:11,350 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-15 14:48:11,397 INFO L238 CfgBuilder]: Building ICFG [2024-10-15 14:48:11,398 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-15 14:48:11,571 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-10-15 14:48:11,571 INFO L287 CfgBuilder]: Performing block encoding [2024-10-15 14:48:11,591 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-15 14:48:11,591 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-15 14:48:11,591 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:48:11 BoogieIcfgContainer [2024-10-15 14:48:11,591 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-15 14:48:11,592 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-15 14:48:11,592 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-15 14:48:11,596 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-15 14:48:11,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 02:48:11" (1/3) ... [2024-10-15 14:48:11,597 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37ccd5b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:48:11, skipping insertion in model container [2024-10-15 14:48:11,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:11" (2/3) ... [2024-10-15 14:48:11,597 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37ccd5b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:48:11, skipping insertion in model container [2024-10-15 14:48:11,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:48:11" (3/3) ... [2024-10-15 14:48:11,599 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound20.c [2024-10-15 14:48:11,610 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-15 14:48:11,610 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-15 14:48:11,643 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-15 14:48:11,648 INFO L333 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;@511f7228, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-15 14:48:11,649 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-15 14:48:11,651 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-10-15 14:48:11,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-15 14:48:11,656 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:11,656 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:11,657 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:11,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:11,660 INFO L85 PathProgramCache]: Analyzing trace with hash -681232038, now seen corresponding path program 1 times [2024-10-15 14:48:11,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:11,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283165429] [2024-10-15 14:48:11,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:11,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:11,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:11,766 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:48:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:11,777 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:48:11,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:11,784 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 14:48:11,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:11,792 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 14:48:11,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:11,798 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:48:11,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:11,805 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-15 14:48:11,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:11,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283165429] [2024-10-15 14:48:11,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283165429] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:48:11,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:48:11,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-15 14:48:11,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167887349] [2024-10-15 14:48:11,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:48:11,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-15 14:48:11,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:11,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-15 14:48:11,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-15 14:48:11,834 INFO L87 Difference]: Start difference. First operand has 38 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-15 14:48:11,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:11,859 INFO L93 Difference]: Finished difference Result 70 states and 112 transitions. [2024-10-15 14:48:11,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-15 14:48:11,861 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2024-10-15 14:48:11,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:11,866 INFO L225 Difference]: With dead ends: 70 [2024-10-15 14:48:11,866 INFO L226 Difference]: Without dead ends: 34 [2024-10-15 14:48:11,868 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-15 14:48:11,870 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:11,871 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:48:11,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-10-15 14:48:11,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-10-15 14:48:11,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-15 14:48:11,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2024-10-15 14:48:11,896 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 32 [2024-10-15 14:48:11,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:11,896 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2024-10-15 14:48:11,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-15 14:48:11,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:11,897 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2024-10-15 14:48:11,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-15 14:48:11,898 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:11,898 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:11,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-15 14:48:11,899 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:11,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:11,901 INFO L85 PathProgramCache]: Analyzing trace with hash -2087558939, now seen corresponding path program 1 times [2024-10-15 14:48:11,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:11,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433219175] [2024-10-15 14:48:11,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:11,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:11,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:12,118 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:48:12,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:12,123 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:48:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:12,130 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 14:48:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:12,134 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 14:48:12,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:12,140 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:48:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:12,165 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-15 14:48:12,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:12,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433219175] [2024-10-15 14:48:12,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433219175] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:48:12,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:48:12,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-15 14:48:12,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444607958] [2024-10-15 14:48:12,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:48:12,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-15 14:48:12,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:12,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-15 14:48:12,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-15 14:48:12,168 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-10-15 14:48:12,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:12,250 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2024-10-15 14:48:12,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-15 14:48:12,250 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2024-10-15 14:48:12,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:12,252 INFO L225 Difference]: With dead ends: 53 [2024-10-15 14:48:12,252 INFO L226 Difference]: Without dead ends: 46 [2024-10-15 14:48:12,253 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-15 14:48:12,254 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 20 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:12,256 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 129 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:48:12,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-10-15 14:48:12,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2024-10-15 14:48:12,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-15 14:48:12,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2024-10-15 14:48:12,267 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 33 [2024-10-15 14:48:12,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:12,268 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2024-10-15 14:48:12,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-10-15 14:48:12,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:12,268 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2024-10-15 14:48:12,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-15 14:48:12,269 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:12,269 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:12,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-15 14:48:12,269 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:12,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:12,270 INFO L85 PathProgramCache]: Analyzing trace with hash 2066421882, now seen corresponding path program 1 times [2024-10-15 14:48:12,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:12,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705651201] [2024-10-15 14:48:12,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:12,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:12,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1601637240] [2024-10-15 14:48:12,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:12,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:12,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:12,286 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) [2024-10-15 14:48:12,287 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-15 14:48:12,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:12,338 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-15 14:48:12,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:12,441 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-15 14:48:12,441 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 14:48:12,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:12,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705651201] [2024-10-15 14:48:12,442 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:12,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601637240] [2024-10-15 14:48:12,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601637240] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:48:12,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:48:12,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:48:12,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683995096] [2024-10-15 14:48:12,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:48:12,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:48:12,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:12,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:48:12,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:48:12,443 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-10-15 14:48:12,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:12,490 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2024-10-15 14:48:12,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:48:12,490 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 36 [2024-10-15 14:48:12,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:12,491 INFO L225 Difference]: With dead ends: 52 [2024-10-15 14:48:12,491 INFO L226 Difference]: Without dead ends: 50 [2024-10-15 14:48:12,492 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-15 14:48:12,493 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:12,493 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 142 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:48:12,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-10-15 14:48:12,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2024-10-15 14:48:12,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-10-15 14:48:12,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2024-10-15 14:48:12,506 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 36 [2024-10-15 14:48:12,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:12,506 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2024-10-15 14:48:12,506 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-10-15 14:48:12,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:12,507 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2024-10-15 14:48:12,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-15 14:48:12,508 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:12,508 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:12,524 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-15 14:48:12,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:12,709 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:12,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:12,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1918028984, now seen corresponding path program 1 times [2024-10-15 14:48:12,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:12,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390935595] [2024-10-15 14:48:12,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:12,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:12,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:12,834 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:48:12,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:12,840 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:48:12,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:12,842 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 14:48:12,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:12,844 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 14:48:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:12,867 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:48:12,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:12,874 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-15 14:48:12,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:12,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390935595] [2024-10-15 14:48:12,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390935595] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:48:12,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617580280] [2024-10-15 14:48:12,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:12,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:12,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:12,880 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) [2024-10-15 14:48:12,882 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-15 14:48:12,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:12,920 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-15 14:48:12,922 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:12,948 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-15 14:48:12,949 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:13,033 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-15 14:48:13,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617580280] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:48:13,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:48:13,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-10-15 14:48:13,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467238813] [2024-10-15 14:48:13,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:13,035 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-15 14:48:13,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:13,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-15 14:48:13,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-15 14:48:13,036 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-15 14:48:13,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:13,173 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2024-10-15 14:48:13,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-15 14:48:13,174 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2024-10-15 14:48:13,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:13,175 INFO L225 Difference]: With dead ends: 102 [2024-10-15 14:48:13,175 INFO L226 Difference]: Without dead ends: 95 [2024-10-15 14:48:13,175 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 81 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-10-15 14:48:13,176 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 60 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:13,176 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 213 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:48:13,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-10-15 14:48:13,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 70. [2024-10-15 14:48:13,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-10-15 14:48:13,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 94 transitions. [2024-10-15 14:48:13,189 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 94 transitions. Word has length 38 [2024-10-15 14:48:13,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:13,190 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 94 transitions. [2024-10-15 14:48:13,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-15 14:48:13,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:13,190 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 94 transitions. [2024-10-15 14:48:13,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-15 14:48:13,191 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:13,191 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:13,208 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-15 14:48:13,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:13,396 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:13,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:13,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1557854921, now seen corresponding path program 1 times [2024-10-15 14:48:13,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:13,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64377792] [2024-10-15 14:48:13,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:13,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:13,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1629051158] [2024-10-15 14:48:13,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:13,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:13,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:13,409 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) [2024-10-15 14:48:13,410 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-15 14:48:13,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:13,450 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-15 14:48:13,451 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:13,518 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-15 14:48:13,519 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 14:48:13,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:13,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64377792] [2024-10-15 14:48:13,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:13,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629051158] [2024-10-15 14:48:13,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629051158] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:48:13,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:48:13,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:48:13,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537670611] [2024-10-15 14:48:13,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:48:13,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:48:13,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:13,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:48:13,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:48:13,521 INFO L87 Difference]: Start difference. First operand 70 states and 94 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-15 14:48:13,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:13,571 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2024-10-15 14:48:13,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:48:13,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2024-10-15 14:48:13,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:13,574 INFO L225 Difference]: With dead ends: 78 [2024-10-15 14:48:13,574 INFO L226 Difference]: Without dead ends: 76 [2024-10-15 14:48:13,574 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-15 14:48:13,574 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:13,575 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 139 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:48:13,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-10-15 14:48:13,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2024-10-15 14:48:13,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-10-15 14:48:13,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2024-10-15 14:48:13,595 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 41 [2024-10-15 14:48:13,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:13,595 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2024-10-15 14:48:13,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-15 14:48:13,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:13,596 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2024-10-15 14:48:13,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-15 14:48:13,597 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:13,598 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:13,614 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-15 14:48:13,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:13,798 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:13,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:13,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1651771191, now seen corresponding path program 1 times [2024-10-15 14:48:13,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:13,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279470078] [2024-10-15 14:48:13,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:13,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:13,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:13,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1223389668] [2024-10-15 14:48:13,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:13,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:13,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:13,814 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) [2024-10-15 14:48:13,817 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-15 14:48:13,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:13,867 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-15 14:48:13,869 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:14,104 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-15 14:48:14,104 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:14,317 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-15 14:48:14,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:14,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279470078] [2024-10-15 14:48:14,317 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:14,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223389668] [2024-10-15 14:48:14,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223389668] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:48:14,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:48:14,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2024-10-15 14:48:14,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978650753] [2024-10-15 14:48:14,318 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:14,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-15 14:48:14,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:14,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-15 14:48:14,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-10-15 14:48:14,319 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-15 14:48:15,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:15,438 INFO L93 Difference]: Finished difference Result 132 states and 180 transitions. [2024-10-15 14:48:15,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-15 14:48:15,438 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 41 [2024-10-15 14:48:15,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:15,441 INFO L225 Difference]: With dead ends: 132 [2024-10-15 14:48:15,442 INFO L226 Difference]: Without dead ends: 130 [2024-10-15 14:48:15,442 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2024-10-15 14:48:15,443 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 99 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:15,443 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 316 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-15 14:48:15,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-10-15 14:48:15,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 109. [2024-10-15 14:48:15,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 76 states have internal predecessors, (94), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-10-15 14:48:15,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 146 transitions. [2024-10-15 14:48:15,478 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 146 transitions. Word has length 41 [2024-10-15 14:48:15,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:15,478 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 146 transitions. [2024-10-15 14:48:15,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-15 14:48:15,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:15,479 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 146 transitions. [2024-10-15 14:48:15,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-15 14:48:15,479 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:15,480 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:15,494 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-15 14:48:15,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:15,680 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:15,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:15,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1994416550, now seen corresponding path program 1 times [2024-10-15 14:48:15,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:15,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86907551] [2024-10-15 14:48:15,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:15,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:15,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:15,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978412108] [2024-10-15 14:48:15,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:15,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:15,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:15,697 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) [2024-10-15 14:48:15,698 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-15 14:48:15,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:15,736 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-15 14:48:15,737 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:15,765 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-15 14:48:15,765 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 14:48:15,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:15,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86907551] [2024-10-15 14:48:15,766 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:15,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978412108] [2024-10-15 14:48:15,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978412108] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:48:15,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:48:15,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:48:15,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18080632] [2024-10-15 14:48:15,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:48:15,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:48:15,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:15,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:48:15,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:48:15,767 INFO L87 Difference]: Start difference. First operand 109 states and 146 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-15 14:48:15,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:15,838 INFO L93 Difference]: Finished difference Result 155 states and 218 transitions. [2024-10-15 14:48:15,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:48:15,839 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2024-10-15 14:48:15,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:15,840 INFO L225 Difference]: With dead ends: 155 [2024-10-15 14:48:15,841 INFO L226 Difference]: Without dead ends: 153 [2024-10-15 14:48:15,841 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-15 14:48:15,842 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:15,842 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 132 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:48:15,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-10-15 14:48:15,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 147. [2024-10-15 14:48:15,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 92 states have (on average 1.2826086956521738) internal successors, (118), 93 states have internal predecessors, (118), 47 states have call successors, (47), 8 states have call predecessors, (47), 7 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2024-10-15 14:48:15,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 210 transitions. [2024-10-15 14:48:15,894 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 210 transitions. Word has length 46 [2024-10-15 14:48:15,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:15,894 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 210 transitions. [2024-10-15 14:48:15,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-15 14:48:15,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:15,895 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 210 transitions. [2024-10-15 14:48:15,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-15 14:48:15,895 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:15,895 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:15,909 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-15 14:48:16,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-15 14:48:16,096 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:16,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:16,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1824834714, now seen corresponding path program 1 times [2024-10-15 14:48:16,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:16,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483066152] [2024-10-15 14:48:16,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:16,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:16,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1023152741] [2024-10-15 14:48:16,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:16,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:16,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:16,111 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) [2024-10-15 14:48:16,112 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-15 14:48:16,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:16,146 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-15 14:48:16,149 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:16,247 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-15 14:48:16,248 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:16,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:16,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483066152] [2024-10-15 14:48:16,295 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:16,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023152741] [2024-10-15 14:48:16,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023152741] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:48:16,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:48:16,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-10-15 14:48:16,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675303939] [2024-10-15 14:48:16,295 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:16,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-15 14:48:16,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:16,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-15 14:48:16,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-15 14:48:16,296 INFO L87 Difference]: Start difference. First operand 147 states and 210 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-15 14:48:16,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:16,440 INFO L93 Difference]: Finished difference Result 174 states and 246 transitions. [2024-10-15 14:48:16,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-15 14:48:16,441 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2024-10-15 14:48:16,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:16,443 INFO L225 Difference]: With dead ends: 174 [2024-10-15 14:48:16,443 INFO L226 Difference]: Without dead ends: 172 [2024-10-15 14:48:16,443 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-10-15 14:48:16,443 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 26 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:16,443 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 221 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:48:16,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-10-15 14:48:16,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2024-10-15 14:48:16,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 105 states have (on average 1.276190476190476) internal successors, (134), 106 states have internal predecessors, (134), 55 states have call successors, (55), 10 states have call predecessors, (55), 9 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2024-10-15 14:48:16,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 242 transitions. [2024-10-15 14:48:16,489 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 242 transitions. Word has length 46 [2024-10-15 14:48:16,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:16,489 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 242 transitions. [2024-10-15 14:48:16,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-15 14:48:16,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:16,490 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 242 transitions. [2024-10-15 14:48:16,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-15 14:48:16,491 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:16,491 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:16,503 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-15 14:48:16,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:16,696 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:16,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:16,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1598858537, now seen corresponding path program 1 times [2024-10-15 14:48:16,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:16,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830756870] [2024-10-15 14:48:16,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:16,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:16,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:16,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [182757562] [2024-10-15 14:48:16,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:16,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:16,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:16,712 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) [2024-10-15 14:48:16,713 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-15 14:48:16,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:16,746 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-15 14:48:16,747 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:16,782 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-15 14:48:16,782 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 14:48:16,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:16,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830756870] [2024-10-15 14:48:16,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:16,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182757562] [2024-10-15 14:48:16,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182757562] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:48:16,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:48:16,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:48:16,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878297690] [2024-10-15 14:48:16,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:48:16,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:48:16,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:16,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:48:16,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:48:16,784 INFO L87 Difference]: Start difference. First operand 170 states and 242 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-15 14:48:16,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:16,863 INFO L93 Difference]: Finished difference Result 254 states and 385 transitions. [2024-10-15 14:48:16,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:48:16,864 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2024-10-15 14:48:16,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:16,866 INFO L225 Difference]: With dead ends: 254 [2024-10-15 14:48:16,866 INFO L226 Difference]: Without dead ends: 252 [2024-10-15 14:48:16,866 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-15 14:48:16,867 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 4 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:16,867 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 140 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:48:16,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-10-15 14:48:16,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 234. [2024-10-15 14:48:16,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 120 states have (on average 1.2416666666666667) internal successors, (149), 133 states have internal predecessors, (149), 103 states have call successors, (103), 11 states have call predecessors, (103), 10 states have return successors, (101), 89 states have call predecessors, (101), 101 states have call successors, (101) [2024-10-15 14:48:16,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 353 transitions. [2024-10-15 14:48:16,926 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 353 transitions. Word has length 51 [2024-10-15 14:48:16,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:16,926 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 353 transitions. [2024-10-15 14:48:16,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-15 14:48:16,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:16,926 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 353 transitions. [2024-10-15 14:48:16,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-15 14:48:16,927 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:16,927 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:16,939 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-15 14:48:17,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:17,128 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:17,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:17,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1695820567, now seen corresponding path program 2 times [2024-10-15 14:48:17,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:17,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8108499] [2024-10-15 14:48:17,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:17,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:17,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:17,168 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:48:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:17,170 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:48:17,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:17,172 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 14:48:17,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:17,173 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 14:48:17,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:17,174 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:48:17,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:17,175 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-15 14:48:17,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:17,177 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-15 14:48:17,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:17,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8108499] [2024-10-15 14:48:17,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8108499] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:48:17,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:48:17,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:48:17,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574295280] [2024-10-15 14:48:17,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:48:17,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:48:17,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:17,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:48:17,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:48:17,179 INFO L87 Difference]: Start difference. First operand 234 states and 353 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-15 14:48:17,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:17,277 INFO L93 Difference]: Finished difference Result 291 states and 429 transitions. [2024-10-15 14:48:17,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-15 14:48:17,278 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 51 [2024-10-15 14:48:17,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:17,280 INFO L225 Difference]: With dead ends: 291 [2024-10-15 14:48:17,280 INFO L226 Difference]: Without dead ends: 177 [2024-10-15 14:48:17,281 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-15 14:48:17,282 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 18 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:17,282 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 168 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:48:17,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-10-15 14:48:17,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 169. [2024-10-15 14:48:17,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 96 states have internal predecessors, (103), 71 states have call successors, (71), 11 states have call predecessors, (71), 10 states have return successors, (69), 61 states have call predecessors, (69), 69 states have call successors, (69) [2024-10-15 14:48:17,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 243 transitions. [2024-10-15 14:48:17,322 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 243 transitions. Word has length 51 [2024-10-15 14:48:17,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:17,322 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 243 transitions. [2024-10-15 14:48:17,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-15 14:48:17,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:17,322 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 243 transitions. [2024-10-15 14:48:17,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-15 14:48:17,323 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:17,323 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:17,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-15 14:48:17,323 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:17,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:17,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1173987183, now seen corresponding path program 1 times [2024-10-15 14:48:17,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:17,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972523015] [2024-10-15 14:48:17,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:17,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:17,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:17,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [208580506] [2024-10-15 14:48:17,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:17,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:17,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:17,340 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) [2024-10-15 14:48:17,341 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-15 14:48:17,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:17,383 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-15 14:48:17,385 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:17,869 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-10-15 14:48:17,869 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:19,299 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-10-15 14:48:19,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:19,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972523015] [2024-10-15 14:48:19,300 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:19,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208580506] [2024-10-15 14:48:19,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208580506] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:48:19,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:48:19,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-10-15 14:48:19,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827878744] [2024-10-15 14:48:19,300 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:19,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-15 14:48:19,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:19,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-15 14:48:19,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-10-15 14:48:19,301 INFO L87 Difference]: Start difference. First operand 169 states and 243 transitions. Second operand has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2024-10-15 14:48:22,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:22,732 INFO L93 Difference]: Finished difference Result 393 states and 601 transitions. [2024-10-15 14:48:22,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-10-15 14:48:22,733 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 63 [2024-10-15 14:48:22,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:22,735 INFO L225 Difference]: With dead ends: 393 [2024-10-15 14:48:22,735 INFO L226 Difference]: Without dead ends: 385 [2024-10-15 14:48:22,736 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=548, Invalid=2532, Unknown=0, NotChecked=0, Total=3080 [2024-10-15 14:48:22,737 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 257 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:22,737 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 660 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-10-15 14:48:22,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2024-10-15 14:48:22,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 234. [2024-10-15 14:48:22,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 131 states have (on average 1.2213740458015268) internal successors, (160), 138 states have internal predecessors, (160), 91 states have call successors, (91), 12 states have call predecessors, (91), 11 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) [2024-10-15 14:48:22,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 340 transitions. [2024-10-15 14:48:22,838 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 340 transitions. Word has length 63 [2024-10-15 14:48:22,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:22,838 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 340 transitions. [2024-10-15 14:48:22,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2024-10-15 14:48:22,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:22,839 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 340 transitions. [2024-10-15 14:48:22,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-10-15 14:48:22,839 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:22,839 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:22,851 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-15 14:48:23,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:23,040 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:23,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:23,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1431506047, now seen corresponding path program 1 times [2024-10-15 14:48:23,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:23,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871917287] [2024-10-15 14:48:23,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:23,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:23,085 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:48:23,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:23,087 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:48:23,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:23,089 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 14:48:23,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:23,090 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 14:48:23,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:23,092 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:48:23,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:23,094 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-15 14:48:23,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:23,097 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-15 14:48:23,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:23,101 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-15 14:48:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:23,103 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-10-15 14:48:23,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:23,105 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-10-15 14:48:23,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:23,106 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-10-15 14:48:23,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:23,107 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-10-15 14:48:23,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:23,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871917287] [2024-10-15 14:48:23,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871917287] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:48:23,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:48:23,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:48:23,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777716311] [2024-10-15 14:48:23,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:48:23,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:48:23,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:23,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:48:23,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:48:23,109 INFO L87 Difference]: Start difference. First operand 234 states and 340 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-10-15 14:48:23,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:23,227 INFO L93 Difference]: Finished difference Result 399 states and 580 transitions. [2024-10-15 14:48:23,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:48:23,227 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 71 [2024-10-15 14:48:23,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:23,229 INFO L225 Difference]: With dead ends: 399 [2024-10-15 14:48:23,229 INFO L226 Difference]: Without dead ends: 243 [2024-10-15 14:48:23,230 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-15 14:48:23,230 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:23,230 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 129 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:48:23,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2024-10-15 14:48:23,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 228. [2024-10-15 14:48:23,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 129 states have (on average 1.2248062015503876) internal successors, (158), 130 states have internal predecessors, (158), 87 states have call successors, (87), 12 states have call predecessors, (87), 11 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2024-10-15 14:48:23,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 330 transitions. [2024-10-15 14:48:23,313 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 330 transitions. Word has length 71 [2024-10-15 14:48:23,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:23,313 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 330 transitions. [2024-10-15 14:48:23,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-10-15 14:48:23,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:23,313 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 330 transitions. [2024-10-15 14:48:23,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-10-15 14:48:23,314 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:23,314 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:23,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-15 14:48:23,314 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:23,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:23,314 INFO L85 PathProgramCache]: Analyzing trace with hash -683532968, now seen corresponding path program 1 times [2024-10-15 14:48:23,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:23,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294816465] [2024-10-15 14:48:23,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:23,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:23,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:23,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [167997734] [2024-10-15 14:48:23,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:23,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:23,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:23,326 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) [2024-10-15 14:48:23,327 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-15 14:48:23,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:23,374 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-15 14:48:23,376 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-10-15 14:48:23,425 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:23,484 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-10-15 14:48:23,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:23,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294816465] [2024-10-15 14:48:23,485 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:23,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167997734] [2024-10-15 14:48:23,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167997734] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-15 14:48:23,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:48:23,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-10-15 14:48:23,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305348418] [2024-10-15 14:48:23,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:48:23,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:48:23,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:23,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:48:23,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-15 14:48:23,486 INFO L87 Difference]: Start difference. First operand 228 states and 330 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-10-15 14:48:23,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:23,599 INFO L93 Difference]: Finished difference Result 234 states and 335 transitions. [2024-10-15 14:48:23,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:48:23,599 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 73 [2024-10-15 14:48:23,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:23,600 INFO L225 Difference]: With dead ends: 234 [2024-10-15 14:48:23,601 INFO L226 Difference]: Without dead ends: 232 [2024-10-15 14:48:23,601 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-15 14:48:23,601 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 4 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:23,601 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 135 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:48:23,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-10-15 14:48:23,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2024-10-15 14:48:23,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 132 states have (on average 1.2196969696969697) internal successors, (161), 133 states have internal predecessors, (161), 87 states have call successors, (87), 13 states have call predecessors, (87), 12 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2024-10-15 14:48:23,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 333 transitions. [2024-10-15 14:48:23,690 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 333 transitions. Word has length 73 [2024-10-15 14:48:23,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:23,691 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 333 transitions. [2024-10-15 14:48:23,691 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-10-15 14:48:23,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:23,691 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 333 transitions. [2024-10-15 14:48:23,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-10-15 14:48:23,691 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:23,691 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:23,705 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-15 14:48:23,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-15 14:48:23,892 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:23,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:23,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1907222079, now seen corresponding path program 1 times [2024-10-15 14:48:23,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:23,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878331064] [2024-10-15 14:48:23,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:23,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:23,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:23,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [790558770] [2024-10-15 14:48:23,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:23,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:23,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:23,906 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) [2024-10-15 14:48:23,907 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-15 14:48:23,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:23,950 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-10-15 14:48:23,952 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:24,307 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-15 14:48:24,307 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:25,081 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-10-15 14:48:25,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:25,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878331064] [2024-10-15 14:48:25,082 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:25,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790558770] [2024-10-15 14:48:25,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790558770] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:48:25,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:48:25,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-10-15 14:48:25,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429731373] [2024-10-15 14:48:25,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:25,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-15 14:48:25,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:25,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-15 14:48:25,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-10-15 14:48:25,084 INFO L87 Difference]: Start difference. First operand 232 states and 333 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-10-15 14:48:30,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-15 14:48:34,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:34,016 INFO L93 Difference]: Finished difference Result 350 states and 504 transitions. [2024-10-15 14:48:34,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-15 14:48:34,017 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 71 [2024-10-15 14:48:34,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:34,019 INFO L225 Difference]: With dead ends: 350 [2024-10-15 14:48:34,019 INFO L226 Difference]: Without dead ends: 348 [2024-10-15 14:48:34,020 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=417, Invalid=1653, Unknown=0, NotChecked=0, Total=2070 [2024-10-15 14:48:34,020 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 159 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 120 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:34,022 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 444 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 571 Invalid, 1 Unknown, 0 Unchecked, 6.3s Time] [2024-10-15 14:48:34,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2024-10-15 14:48:34,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 325. [2024-10-15 14:48:34,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 187 states have (on average 1.2299465240641712) internal successors, (230), 188 states have internal predecessors, (230), 123 states have call successors, (123), 15 states have call predecessors, (123), 14 states have return successors, (121), 121 states have call predecessors, (121), 121 states have call successors, (121) [2024-10-15 14:48:34,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 474 transitions. [2024-10-15 14:48:34,176 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 474 transitions. Word has length 71 [2024-10-15 14:48:34,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:34,177 INFO L471 AbstractCegarLoop]: Abstraction has 325 states and 474 transitions. [2024-10-15 14:48:34,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-10-15 14:48:34,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:34,177 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 474 transitions. [2024-10-15 14:48:34,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-10-15 14:48:34,178 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:34,178 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:34,190 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-15 14:48:34,378 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-15 14:48:34,378 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:34,379 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:34,379 INFO L85 PathProgramCache]: Analyzing trace with hash 992091053, now seen corresponding path program 2 times [2024-10-15 14:48:34,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:34,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835673574] [2024-10-15 14:48:34,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:34,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:34,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039824429] [2024-10-15 14:48:34,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:48:34,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:34,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:34,398 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) [2024-10-15 14:48:34,403 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-15 14:48:34,470 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:48:34,470 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:48:34,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-15 14:48:34,472 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:34,580 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-10-15 14:48:34,581 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:34,678 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-10-15 14:48:34,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:34,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835673574] [2024-10-15 14:48:34,678 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:34,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039824429] [2024-10-15 14:48:34,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039824429] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:48:34,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:48:34,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2024-10-15 14:48:34,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774858260] [2024-10-15 14:48:34,679 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:34,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-15 14:48:34,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:34,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-15 14:48:34,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-10-15 14:48:34,679 INFO L87 Difference]: Start difference. First operand 325 states and 474 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-10-15 14:48:35,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:35,438 INFO L93 Difference]: Finished difference Result 426 states and 616 transitions. [2024-10-15 14:48:35,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-15 14:48:35,440 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 71 [2024-10-15 14:48:35,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:35,442 INFO L225 Difference]: With dead ends: 426 [2024-10-15 14:48:35,442 INFO L226 Difference]: Without dead ends: 424 [2024-10-15 14:48:35,444 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2024-10-15 14:48:35,444 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 69 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:35,445 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 271 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-15 14:48:35,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2024-10-15 14:48:35,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 403. [2024-10-15 14:48:35,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 231 states have (on average 1.2337662337662338) internal successors, (285), 232 states have internal predecessors, (285), 155 states have call successors, (155), 17 states have call predecessors, (155), 16 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2024-10-15 14:48:35,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 593 transitions. [2024-10-15 14:48:35,646 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 593 transitions. Word has length 71 [2024-10-15 14:48:35,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:35,646 INFO L471 AbstractCegarLoop]: Abstraction has 403 states and 593 transitions. [2024-10-15 14:48:35,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-10-15 14:48:35,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:35,647 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 593 transitions. [2024-10-15 14:48:35,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-10-15 14:48:35,649 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:35,649 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:35,655 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-15 14:48:35,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-15 14:48:35,850 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:35,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:35,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1837389712, now seen corresponding path program 1 times [2024-10-15 14:48:35,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:35,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602916301] [2024-10-15 14:48:35,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:35,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:35,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:35,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [523274887] [2024-10-15 14:48:35,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:35,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:35,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:35,870 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) [2024-10-15 14:48:35,871 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-15 14:48:35,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:35,920 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-10-15 14:48:35,921 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:36,413 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-10-15 14:48:36,413 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:38,078 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-10-15 14:48:38,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:38,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602916301] [2024-10-15 14:48:38,078 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:38,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523274887] [2024-10-15 14:48:38,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523274887] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:48:38,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:48:38,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2024-10-15 14:48:38,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156108713] [2024-10-15 14:48:38,079 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:38,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-15 14:48:38,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:38,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-15 14:48:38,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2024-10-15 14:48:38,080 INFO L87 Difference]: Start difference. First operand 403 states and 593 transitions. Second operand has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2024-10-15 14:48:44,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:44,521 INFO L93 Difference]: Finished difference Result 544 states and 801 transitions. [2024-10-15 14:48:44,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-10-15 14:48:44,521 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 85 [2024-10-15 14:48:44,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:44,524 INFO L225 Difference]: With dead ends: 544 [2024-10-15 14:48:44,524 INFO L226 Difference]: Without dead ends: 540 [2024-10-15 14:48:44,525 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=737, Invalid=3045, Unknown=0, NotChecked=0, Total=3782 [2024-10-15 14:48:44,525 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 210 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:44,525 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 708 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1024 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-10-15 14:48:44,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2024-10-15 14:48:44,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 526. [2024-10-15 14:48:44,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 302 states have (on average 1.2384105960264902) internal successors, (374), 303 states have internal predecessors, (374), 203 states have call successors, (203), 21 states have call predecessors, (203), 20 states have return successors, (201), 201 states have call predecessors, (201), 201 states have call successors, (201) [2024-10-15 14:48:44,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 778 transitions. [2024-10-15 14:48:44,839 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 778 transitions. Word has length 85 [2024-10-15 14:48:44,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:44,840 INFO L471 AbstractCegarLoop]: Abstraction has 526 states and 778 transitions. [2024-10-15 14:48:44,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2024-10-15 14:48:44,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:44,840 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 778 transitions. [2024-10-15 14:48:44,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-10-15 14:48:44,841 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:44,841 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:44,854 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-15 14:48:45,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-15 14:48:45,042 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:45,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:45,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1100697445, now seen corresponding path program 1 times [2024-10-15 14:48:45,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:45,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850311127] [2024-10-15 14:48:45,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:45,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:45,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:45,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1324221746] [2024-10-15 14:48:45,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:45,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:45,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:45,063 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) [2024-10-15 14:48:45,065 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-15 14:48:45,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:45,115 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-15 14:48:45,117 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:45,322 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 30 proven. 19 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2024-10-15 14:48:45,322 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:45,737 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 26 proven. 14 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2024-10-15 14:48:45,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:45,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850311127] [2024-10-15 14:48:45,737 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:45,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324221746] [2024-10-15 14:48:45,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324221746] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:48:45,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:48:45,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-10-15 14:48:45,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382373198] [2024-10-15 14:48:45,738 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:45,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-15 14:48:45,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:45,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-15 14:48:45,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-10-15 14:48:45,739 INFO L87 Difference]: Start difference. First operand 526 states and 778 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 18 states have internal predecessors, (46), 8 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-10-15 14:48:47,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:47,476 INFO L93 Difference]: Finished difference Result 1227 states and 1964 transitions. [2024-10-15 14:48:47,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-15 14:48:47,477 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 18 states have internal predecessors, (46), 8 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 98 [2024-10-15 14:48:47,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:47,482 INFO L225 Difference]: With dead ends: 1227 [2024-10-15 14:48:47,482 INFO L226 Difference]: Without dead ends: 1225 [2024-10-15 14:48:47,483 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2024-10-15 14:48:47,484 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 149 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:47,484 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 411 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-15 14:48:47,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2024-10-15 14:48:48,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1156. [2024-10-15 14:48:48,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 553 states have (on average 1.332730560578662) internal successors, (737), 554 states have internal predecessors, (737), 579 states have call successors, (579), 24 states have call predecessors, (579), 23 states have return successors, (577), 577 states have call predecessors, (577), 577 states have call successors, (577) [2024-10-15 14:48:48,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1893 transitions. [2024-10-15 14:48:48,358 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1893 transitions. Word has length 98 [2024-10-15 14:48:48,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:48,358 INFO L471 AbstractCegarLoop]: Abstraction has 1156 states and 1893 transitions. [2024-10-15 14:48:48,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 18 states have internal predecessors, (46), 8 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-10-15 14:48:48,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:48,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1893 transitions. [2024-10-15 14:48:48,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-10-15 14:48:48,359 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:48,360 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:48,371 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-15 14:48:48,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-15 14:48:48,560 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:48,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:48,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1927942246, now seen corresponding path program 3 times [2024-10-15 14:48:48,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:48,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376960741] [2024-10-15 14:48:48,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:48,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:48,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:48,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149454831] [2024-10-15 14:48:48,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:48:48,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:48,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:48,576 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:48:48,577 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-15 14:48:48,641 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-15 14:48:48,641 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:48:48,642 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-10-15 14:48:48,644 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:48,888 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2024-10-15 14:48:48,888 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:49,172 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2024-10-15 14:48:49,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:49,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376960741] [2024-10-15 14:48:49,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:49,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149454831] [2024-10-15 14:48:49,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149454831] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:48:49,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:48:49,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2024-10-15 14:48:49,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862470953] [2024-10-15 14:48:49,173 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:49,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-15 14:48:49,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:49,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-15 14:48:49,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2024-10-15 14:48:49,174 INFO L87 Difference]: Start difference. First operand 1156 states and 1893 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2024-10-15 14:48:51,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:51,438 INFO L93 Difference]: Finished difference Result 1373 states and 2256 transitions. [2024-10-15 14:48:51,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-15 14:48:51,438 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 96 [2024-10-15 14:48:51,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:51,445 INFO L225 Difference]: With dead ends: 1373 [2024-10-15 14:48:51,445 INFO L226 Difference]: Without dead ends: 1369 [2024-10-15 14:48:51,446 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 175 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2024-10-15 14:48:51,447 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 63 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:51,447 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 393 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-15 14:48:51,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2024-10-15 14:48:52,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1158. [2024-10-15 14:48:52,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 555 states have (on average 1.3297297297297297) internal successors, (738), 555 states have internal predecessors, (738), 579 states have call successors, (579), 25 states have call predecessors, (579), 23 states have return successors, (577), 577 states have call predecessors, (577), 577 states have call successors, (577) [2024-10-15 14:48:52,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 1894 transitions. [2024-10-15 14:48:52,560 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 1894 transitions. Word has length 96 [2024-10-15 14:48:52,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:52,561 INFO L471 AbstractCegarLoop]: Abstraction has 1158 states and 1894 transitions. [2024-10-15 14:48:52,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2024-10-15 14:48:52,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:52,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 1894 transitions. [2024-10-15 14:48:52,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-10-15 14:48:52,562 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:52,562 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:52,568 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-15 14:48:52,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-15 14:48:52,767 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:52,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:52,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1336069028, now seen corresponding path program 2 times [2024-10-15 14:48:52,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:52,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379792127] [2024-10-15 14:48:52,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:52,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:52,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:52,868 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:48:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:52,871 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:48:52,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:52,872 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 14:48:52,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:52,873 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 14:48:52,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:52,874 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:48:52,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:52,875 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-15 14:48:52,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:52,877 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-15 14:48:52,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:52,879 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-10-15 14:48:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:52,881 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-10-15 14:48:52,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:52,882 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-10-15 14:48:52,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:52,884 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-10-15 14:48:52,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:52,886 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-10-15 14:48:52,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:52,888 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-10-15 14:48:52,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:52,890 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-10-15 14:48:52,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:52,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379792127] [2024-10-15 14:48:52,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379792127] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:48:52,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690937944] [2024-10-15 14:48:52,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:48:52,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:52,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:52,892 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:48:52,893 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-15 14:48:52,962 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:48:52,962 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:48:52,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-15 14:48:52,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:53,003 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-10-15 14:48:53,003 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:53,076 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-10-15 14:48:53,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690937944] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:48:53,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:48:53,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2024-10-15 14:48:53,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594287246] [2024-10-15 14:48:53,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:53,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-15 14:48:53,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:53,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-15 14:48:53,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-10-15 14:48:53,077 INFO L87 Difference]: Start difference. First operand 1158 states and 1894 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-10-15 14:48:54,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:54,568 INFO L93 Difference]: Finished difference Result 1291 states and 2100 transitions. [2024-10-15 14:48:54,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-15 14:48:54,569 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 98 [2024-10-15 14:48:54,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:54,575 INFO L225 Difference]: With dead ends: 1291 [2024-10-15 14:48:54,575 INFO L226 Difference]: Without dead ends: 1286 [2024-10-15 14:48:54,576 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 220 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2024-10-15 14:48:54,576 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 66 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:54,577 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 457 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:48:54,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2024-10-15 14:48:55,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1152. [2024-10-15 14:48:55,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 549 states have (on average 1.331511839708561) internal successors, (731), 549 states have internal predecessors, (731), 579 states have call successors, (579), 25 states have call predecessors, (579), 23 states have return successors, (577), 577 states have call predecessors, (577), 577 states have call successors, (577) [2024-10-15 14:48:55,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1887 transitions. [2024-10-15 14:48:55,612 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1887 transitions. Word has length 98 [2024-10-15 14:48:55,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:55,612 INFO L471 AbstractCegarLoop]: Abstraction has 1152 states and 1887 transitions. [2024-10-15 14:48:55,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-10-15 14:48:55,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:55,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1887 transitions. [2024-10-15 14:48:55,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-10-15 14:48:55,614 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:55,614 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:55,619 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-15 14:48:55,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:55,815 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:55,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:55,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1998153044, now seen corresponding path program 2 times [2024-10-15 14:48:55,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:55,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285766593] [2024-10-15 14:48:55,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:55,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:55,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:55,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [424446276] [2024-10-15 14:48:55,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:48:55,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:55,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:55,830 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:48:55,831 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-15 14:48:55,911 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:48:55,911 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:48:55,912 INFO L255 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-10-15 14:48:55,914 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:56,712 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 53 proven. 44 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2024-10-15 14:48:56,712 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:59,705 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 50 proven. 38 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2024-10-15 14:48:59,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:59,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285766593] [2024-10-15 14:48:59,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:59,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424446276] [2024-10-15 14:48:59,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424446276] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:48:59,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:48:59,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 33 [2024-10-15 14:48:59,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154264551] [2024-10-15 14:48:59,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:59,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-15 14:48:59,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:59,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-15 14:48:59,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2024-10-15 14:48:59,707 INFO L87 Difference]: Start difference. First operand 1152 states and 1887 transitions. Second operand has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 11 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) [2024-10-15 14:49:15,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:49:15,880 INFO L93 Difference]: Finished difference Result 1442 states and 2319 transitions. [2024-10-15 14:49:15,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-10-15 14:49:15,881 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 11 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) Word has length 112 [2024-10-15 14:49:15,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:49:15,888 INFO L225 Difference]: With dead ends: 1442 [2024-10-15 14:49:15,888 INFO L226 Difference]: Without dead ends: 1436 [2024-10-15 14:49:15,890 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1951 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=1488, Invalid=5994, Unknown=0, NotChecked=0, Total=7482 [2024-10-15 14:49:15,890 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 274 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 1891 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 1096 SdHoareTripleChecker+Invalid, 2168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 1891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-10-15 14:49:15,890 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 1096 Invalid, 2168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 1891 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2024-10-15 14:49:15,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2024-10-15 14:49:17,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1164. [2024-10-15 14:49:17,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1164 states, 575 states have (on average 1.3165217391304347) internal successors, (757), 575 states have internal predecessors, (757), 559 states have call successors, (559), 31 states have call predecessors, (559), 29 states have return successors, (557), 557 states have call predecessors, (557), 557 states have call successors, (557) [2024-10-15 14:49:17,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1164 states to 1164 states and 1873 transitions. [2024-10-15 14:49:17,377 INFO L78 Accepts]: Start accepts. Automaton has 1164 states and 1873 transitions. Word has length 112 [2024-10-15 14:49:17,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:49:17,377 INFO L471 AbstractCegarLoop]: Abstraction has 1164 states and 1873 transitions. [2024-10-15 14:49:17,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 11 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) [2024-10-15 14:49:17,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:49:17,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1164 states and 1873 transitions. [2024-10-15 14:49:17,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-10-15 14:49:17,379 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:49:17,379 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:49:17,387 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-15 14:49:17,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:49:17,580 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:49:17,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:49:17,580 INFO L85 PathProgramCache]: Analyzing trace with hash -2105883196, now seen corresponding path program 3 times [2024-10-15 14:49:17,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:49:17,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720235473] [2024-10-15 14:49:17,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:49:17,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:49:17,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:49:17,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [585544440] [2024-10-15 14:49:17,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:49:17,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:49:17,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:49:17,603 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:49:17,604 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-15 14:49:17,689 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-15 14:49:17,690 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:49:17,691 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-10-15 14:49:17,693 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:49:18,317 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-10-15 14:49:18,317 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:49:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-10-15 14:49:20,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:49:20,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720235473] [2024-10-15 14:49:20,798 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:49:20,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585544440] [2024-10-15 14:49:20,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585544440] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:49:20,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:49:20,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2024-10-15 14:49:20,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556245791] [2024-10-15 14:49:20,799 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:49:20,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-15 14:49:20,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:49:20,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-15 14:49:20,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2024-10-15 14:49:20,800 INFO L87 Difference]: Start difference. First operand 1164 states and 1873 transitions. Second operand has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 9 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2024-10-15 14:49:36,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:49:36,248 INFO L93 Difference]: Finished difference Result 1591 states and 2542 transitions. [2024-10-15 14:49:36,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2024-10-15 14:49:36,248 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 9 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) Word has length 115 [2024-10-15 14:49:36,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:49:36,255 INFO L225 Difference]: With dead ends: 1591 [2024-10-15 14:49:36,256 INFO L226 Difference]: Without dead ends: 1585 [2024-10-15 14:49:36,258 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3547 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=2066, Invalid=9490, Unknown=0, NotChecked=0, Total=11556 [2024-10-15 14:49:36,258 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 307 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 1470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-10-15 14:49:36,259 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 974 Invalid, 1470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-10-15 14:49:36,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2024-10-15 14:49:38,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 1348. [2024-10-15 14:49:38,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 671 states have (on average 1.3129657228017884) internal successors, (881), 671 states have internal predecessors, (881), 643 states have call successors, (643), 35 states have call predecessors, (643), 33 states have return successors, (641), 641 states have call predecessors, (641), 641 states have call successors, (641) [2024-10-15 14:49:38,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 2165 transitions. [2024-10-15 14:49:38,302 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 2165 transitions. Word has length 115 [2024-10-15 14:49:38,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:49:38,302 INFO L471 AbstractCegarLoop]: Abstraction has 1348 states and 2165 transitions. [2024-10-15 14:49:38,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 9 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2024-10-15 14:49:38,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:49:38,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 2165 transitions. [2024-10-15 14:49:38,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-10-15 14:49:38,304 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:49:38,304 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:49:38,311 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-15 14:49:38,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:49:38,505 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:49:38,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:49:38,505 INFO L85 PathProgramCache]: Analyzing trace with hash 402888186, now seen corresponding path program 4 times [2024-10-15 14:49:38,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:49:38,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182346272] [2024-10-15 14:49:38,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:49:38,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:49:38,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:49:38,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1255441484] [2024-10-15 14:49:38,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:49:38,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:49:38,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:49:38,520 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:49:38,521 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-15 14:49:38,580 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:49:38,581 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:49:38,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-10-15 14:49:38,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:49:39,525 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 56 proven. 48 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2024-10-15 14:49:39,525 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:49:40,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:49:40,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182346272] [2024-10-15 14:49:40,909 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:49:40,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255441484] [2024-10-15 14:49:40,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255441484] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:49:40,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:49:40,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-10-15 14:49:40,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011004598] [2024-10-15 14:49:40,910 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:49:40,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-15 14:49:40,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:49:40,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-15 14:49:40,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2024-10-15 14:49:40,911 INFO L87 Difference]: Start difference. First operand 1348 states and 2165 transitions. Second operand has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-10-15 14:49:44,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:49:44,103 INFO L93 Difference]: Finished difference Result 1493 states and 2379 transitions. [2024-10-15 14:49:44,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-15 14:49:44,103 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 115 [2024-10-15 14:49:44,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:49:44,110 INFO L225 Difference]: With dead ends: 1493 [2024-10-15 14:49:44,110 INFO L226 Difference]: Without dead ends: 1488 [2024-10-15 14:49:44,111 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2024-10-15 14:49:44,111 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 86 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-15 14:49:44,111 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 800 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-15 14:49:44,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2024-10-15 14:49:46,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1462. [2024-10-15 14:49:46,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 725 states have (on average 1.3131034482758621) internal successors, (952), 725 states have internal predecessors, (952), 699 states have call successors, (699), 39 states have call predecessors, (699), 37 states have return successors, (697), 697 states have call predecessors, (697), 697 states have call successors, (697) [2024-10-15 14:49:46,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 2348 transitions. [2024-10-15 14:49:46,331 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 2348 transitions. Word has length 115 [2024-10-15 14:49:46,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:49:46,331 INFO L471 AbstractCegarLoop]: Abstraction has 1462 states and 2348 transitions. [2024-10-15 14:49:46,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-10-15 14:49:46,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:49:46,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 2348 transitions. [2024-10-15 14:49:46,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-10-15 14:49:46,333 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:49:46,333 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:49:46,345 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-10-15 14:49:46,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-10-15 14:49:46,533 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:49:46,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:49:46,534 INFO L85 PathProgramCache]: Analyzing trace with hash 488840605, now seen corresponding path program 5 times [2024-10-15 14:49:46,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:49:46,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009144125] [2024-10-15 14:49:46,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:49:46,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:49:46,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:49:46,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1178965695] [2024-10-15 14:49:46,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:49:46,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:49:46,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:49:46,551 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:49:46,552 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-15 14:49:46,637 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-10-15 14:49:46,638 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:49:46,639 INFO L255 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-10-15 14:49:46,642 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:49:47,455 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 43 proven. 95 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2024-10-15 14:49:47,455 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:49:51,828 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 43 proven. 95 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2024-10-15 14:49:51,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:49:51,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009144125] [2024-10-15 14:49:51,828 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:49:51,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178965695] [2024-10-15 14:49:51,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178965695] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:49:51,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:49:51,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 38 [2024-10-15 14:49:51,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517855745] [2024-10-15 14:49:51,829 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:49:51,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-15 14:49:51,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:49:51,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-15 14:49:51,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2024-10-15 14:49:51,830 INFO L87 Difference]: Start difference. First operand 1462 states and 2348 transitions. Second operand has 38 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 10 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (29), 9 states have call predecessors, (29), 8 states have call successors, (29) [2024-10-15 14:50:04,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-15 14:50:31,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:50:31,423 INFO L93 Difference]: Finished difference Result 2356 states and 3786 transitions. [2024-10-15 14:50:31,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2024-10-15 14:50:31,424 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 10 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (29), 9 states have call predecessors, (29), 8 states have call successors, (29) Word has length 120 [2024-10-15 14:50:31,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:50:31,433 INFO L225 Difference]: With dead ends: 2356 [2024-10-15 14:50:31,433 INFO L226 Difference]: Without dead ends: 2350 [2024-10-15 14:50:31,436 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5531 ImplicationChecksByTransitivity, 28.4s TimeCoverageRelationStatistics Valid=3568, Invalid=14792, Unknown=0, NotChecked=0, Total=18360 [2024-10-15 14:50:31,437 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 457 mSDsluCounter, 1243 mSDsCounter, 0 mSdLazyCounter, 1765 mSolverCounterSat, 524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 2289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 524 IncrementalHoareTripleChecker+Valid, 1765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2024-10-15 14:50:31,437 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 1308 Invalid, 2289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [524 Valid, 1765 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2024-10-15 14:50:31,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2024-10-15 14:50:35,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1808. [2024-10-15 14:50:35,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1808 states, 916 states have (on average 1.3013100436681222) internal successors, (1192), 916 states have internal predecessors, (1192), 847 states have call successors, (847), 46 states have call predecessors, (847), 44 states have return successors, (845), 845 states have call predecessors, (845), 845 states have call successors, (845) [2024-10-15 14:50:35,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1808 states to 1808 states and 2884 transitions. [2024-10-15 14:50:35,134 INFO L78 Accepts]: Start accepts. Automaton has 1808 states and 2884 transitions. Word has length 120 [2024-10-15 14:50:35,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:50:35,135 INFO L471 AbstractCegarLoop]: Abstraction has 1808 states and 2884 transitions. [2024-10-15 14:50:35,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 10 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (29), 9 states have call predecessors, (29), 8 states have call successors, (29) [2024-10-15 14:50:35,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:50:35,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1808 states and 2884 transitions. [2024-10-15 14:50:35,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-10-15 14:50:35,137 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:50:35,137 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:50:35,143 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-10-15 14:50:35,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-10-15 14:50:35,338 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:50:35,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:50:35,338 INFO L85 PathProgramCache]: Analyzing trace with hash 43466790, now seen corresponding path program 6 times [2024-10-15 14:50:35,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:50:35,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162997208] [2024-10-15 14:50:35,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:50:35,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:50:35,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:50:35,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [430783642] [2024-10-15 14:50:35,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 14:50:35,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:50:35,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:50:35,351 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:50:35,351 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-15 14:50:35,414 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-10-15 14:50:35,414 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:50:35,415 INFO L255 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-10-15 14:50:35,418 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:50:36,036 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 32 proven. 45 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-10-15 14:50:36,036 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:50:38,664 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 32 proven. 45 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-10-15 14:50:38,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:50:38,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162997208] [2024-10-15 14:50:38,665 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:50:38,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430783642] [2024-10-15 14:50:38,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430783642] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:50:38,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:50:38,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2024-10-15 14:50:38,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049740430] [2024-10-15 14:50:38,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:50:38,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-15 14:50:38,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:50:38,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-15 14:50:38,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2024-10-15 14:50:38,666 INFO L87 Difference]: Start difference. First operand 1808 states and 2884 transitions. Second operand has 26 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 25 states have internal predecessors, (56), 11 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) [2024-10-15 14:50:55,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:50:55,043 INFO L93 Difference]: Finished difference Result 2210 states and 3523 transitions. [2024-10-15 14:50:55,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-10-15 14:50:55,044 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 25 states have internal predecessors, (56), 11 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) Word has length 132 [2024-10-15 14:50:55,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:50:55,053 INFO L225 Difference]: With dead ends: 2210 [2024-10-15 14:50:55,053 INFO L226 Difference]: Without dead ends: 2204 [2024-10-15 14:50:55,054 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 237 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1971 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=1277, Invalid=5695, Unknown=0, NotChecked=0, Total=6972 [2024-10-15 14:50:55,054 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 212 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-10-15 14:50:55,054 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 794 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-10-15 14:50:55,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2024-10-15 14:50:59,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 2019. [2024-10-15 14:50:59,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2019 states, 1016 states have (on average 1.3061023622047243) internal successors, (1327), 1016 states have internal predecessors, (1327), 955 states have call successors, (955), 49 states have call predecessors, (955), 47 states have return successors, (953), 953 states have call predecessors, (953), 953 states have call successors, (953) [2024-10-15 14:50:59,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2019 states to 2019 states and 3235 transitions. [2024-10-15 14:50:59,270 INFO L78 Accepts]: Start accepts. Automaton has 2019 states and 3235 transitions. Word has length 132 [2024-10-15 14:50:59,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:50:59,270 INFO L471 AbstractCegarLoop]: Abstraction has 2019 states and 3235 transitions. [2024-10-15 14:50:59,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 25 states have internal predecessors, (56), 11 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) [2024-10-15 14:50:59,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:50:59,271 INFO L276 IsEmpty]: Start isEmpty. Operand 2019 states and 3235 transitions. [2024-10-15 14:50:59,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-10-15 14:50:59,273 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:50:59,273 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:50:59,286 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-10-15 14:50:59,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-10-15 14:50:59,474 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:50:59,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:50:59,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1666271485, now seen corresponding path program 7 times [2024-10-15 14:50:59,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:50:59,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101418254] [2024-10-15 14:50:59,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:50:59,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:50:59,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:50:59,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1035885468] [2024-10-15 14:50:59,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-15 14:50:59,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:50:59,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:50:59,504 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:50:59,505 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-15 14:50:59,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:50:59,572 INFO L255 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-10-15 14:50:59,575 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:51:00,556 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 38 proven. 69 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-10-15 14:51:00,556 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:51:03,941 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 32 proven. 66 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-10-15 14:51:03,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:51:03,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101418254] [2024-10-15 14:51:03,942 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:51:03,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035885468] [2024-10-15 14:51:03,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035885468] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:51:03,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:51:03,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2024-10-15 14:51:03,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124163117] [2024-10-15 14:51:03,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:51:03,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-10-15 14:51:03,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:51:03,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-10-15 14:51:03,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1143, Unknown=0, NotChecked=0, Total=1332 [2024-10-15 14:51:03,945 INFO L87 Difference]: Start difference. First operand 2019 states and 3235 transitions. Second operand has 37 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 12 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 10 states have call predecessors, (39), 10 states have call successors, (39) [2024-10-15 14:51:42,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:51:42,598 INFO L93 Difference]: Finished difference Result 2697 states and 4265 transitions. [2024-10-15 14:51:42,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2024-10-15 14:51:42,598 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 12 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 10 states have call predecessors, (39), 10 states have call successors, (39) Word has length 140 [2024-10-15 14:51:42,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:51:42,608 INFO L225 Difference]: With dead ends: 2697 [2024-10-15 14:51:42,608 INFO L226 Difference]: Without dead ends: 2493 [2024-10-15 14:51:42,611 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6856 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=3569, Invalid=17601, Unknown=0, NotChecked=0, Total=21170 [2024-10-15 14:51:42,611 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 558 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 1666 mSolverCounterSat, 571 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 2237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 571 IncrementalHoareTripleChecker+Valid, 1666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2024-10-15 14:51:42,611 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 1188 Invalid, 2237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [571 Valid, 1666 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2024-10-15 14:51:42,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2024-10-15 14:51:47,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2201. [2024-10-15 14:51:47,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 1113 states have (on average 1.3018867924528301) internal successors, (1449), 1113 states have internal predecessors, (1449), 1035 states have call successors, (1035), 54 states have call predecessors, (1035), 52 states have return successors, (1033), 1033 states have call predecessors, (1033), 1033 states have call successors, (1033) [2024-10-15 14:51:47,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 3517 transitions. [2024-10-15 14:51:47,562 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 3517 transitions. Word has length 140 [2024-10-15 14:51:47,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:51:47,562 INFO L471 AbstractCegarLoop]: Abstraction has 2201 states and 3517 transitions. [2024-10-15 14:51:47,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 12 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 10 states have call predecessors, (39), 10 states have call successors, (39) [2024-10-15 14:51:47,563 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:51:47,563 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 3517 transitions. [2024-10-15 14:51:47,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2024-10-15 14:51:47,566 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:51:47,566 INFO L215 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:51:47,580 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-10-15 14:51:47,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-10-15 14:51:47,770 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:51:47,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:51:47,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1290054545, now seen corresponding path program 8 times [2024-10-15 14:51:47,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:51:47,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872872332] [2024-10-15 14:51:47,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:51:47,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:51:47,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:47,854 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:51:47,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:47,855 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:51:47,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:47,860 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 14:51:47,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:47,861 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 14:51:47,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:47,862 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:51:47,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:47,862 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-15 14:51:47,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:47,865 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-15 14:51:47,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:47,870 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-15 14:51:47,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:47,872 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-10-15 14:51:47,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:47,873 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-10-15 14:51:47,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:47,875 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-10-15 14:51:47,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:47,877 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-15 14:51:47,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:47,878 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-10-15 14:51:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:47,881 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-10-15 14:51:47,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:47,884 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-10-15 14:51:47,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:47,887 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-10-15 14:51:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:47,888 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-10-15 14:51:47,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:47,890 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-10-15 14:51:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:47,891 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-10-15 14:51:47,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:47,892 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-10-15 14:51:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:47,893 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2024-10-15 14:51:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:47,894 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2024-10-15 14:51:47,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:47,895 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2024-10-15 14:51:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:47,896 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2024-10-15 14:51:47,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:47,897 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2024-10-15 14:51:47,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:51:47,900 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 90 proven. 18 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2024-10-15 14:51:47,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:51:47,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872872332] [2024-10-15 14:51:47,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872872332] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:51:47,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740380979] [2024-10-15 14:51:47,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:51:47,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:51:47,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:51:47,903 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:51:47,903 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-15 14:51:47,985 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:51:47,985 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:51:47,986 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-15 14:51:47,988 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:51:48,025 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 458 proven. 18 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2024-10-15 14:51:48,025 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:51:48,100 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 90 proven. 18 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2024-10-15 14:51:48,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740380979] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:51:48,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:51:48,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2024-10-15 14:51:48,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265853912] [2024-10-15 14:51:48,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:51:48,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-15 14:51:48,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:51:48,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-15 14:51:48,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-15 14:51:48,102 INFO L87 Difference]: Start difference. First operand 2201 states and 3517 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 5 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2024-10-15 14:51:54,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:51:54,011 INFO L93 Difference]: Finished difference Result 3578 states and 5730 transitions. [2024-10-15 14:51:54,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-15 14:51:54,012 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 5 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) Word has length 157 [2024-10-15 14:51:54,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:51:54,023 INFO L225 Difference]: With dead ends: 3578 [2024-10-15 14:51:54,023 INFO L226 Difference]: Without dead ends: 2493 [2024-10-15 14:51:54,029 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 359 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-10-15 14:51:54,029 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 6 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:51:54,030 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 248 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:51:54,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2024-10-15 14:51:59,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2297. [2024-10-15 14:51:59,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2297 states, 1195 states have (on average 1.284518828451883) internal successors, (1535), 1227 states have internal predecessors, (1535), 1049 states have call successors, (1049), 54 states have call predecessors, (1049), 52 states have return successors, (1047), 1015 states have call predecessors, (1047), 1047 states have call successors, (1047) [2024-10-15 14:51:59,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2297 states to 2297 states and 3631 transitions. [2024-10-15 14:51:59,368 INFO L78 Accepts]: Start accepts. Automaton has 2297 states and 3631 transitions. Word has length 157 [2024-10-15 14:51:59,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:51:59,369 INFO L471 AbstractCegarLoop]: Abstraction has 2297 states and 3631 transitions. [2024-10-15 14:51:59,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 5 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2024-10-15 14:51:59,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:51:59,369 INFO L276 IsEmpty]: Start isEmpty. Operand 2297 states and 3631 transitions. [2024-10-15 14:51:59,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-10-15 14:51:59,373 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:51:59,373 INFO L215 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:51:59,379 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-10-15 14:51:59,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-10-15 14:51:59,574 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:51:59,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:51:59,575 INFO L85 PathProgramCache]: Analyzing trace with hash -758309700, now seen corresponding path program 9 times [2024-10-15 14:51:59,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:51:59,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827615482] [2024-10-15 14:51:59,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:51:59,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:51:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:51:59,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1787159653] [2024-10-15 14:51:59,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:51:59,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:51:59,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:51:59,600 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:51:59,602 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-15 14:51:59,656 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-15 14:51:59,656 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:51:59,657 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-10-15 14:51:59,659 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:52:00,698 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 105 proven. 48 refuted. 0 times theorem prover too weak. 751 trivial. 0 not checked. [2024-10-15 14:52:00,698 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:52:02,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:52:02,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827615482] [2024-10-15 14:52:02,236 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:52:02,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787159653] [2024-10-15 14:52:02,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787159653] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:52:02,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:52:02,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-10-15 14:52:02,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010015957] [2024-10-15 14:52:02,236 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:52:02,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-15 14:52:02,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:52:02,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-15 14:52:02,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2024-10-15 14:52:02,237 INFO L87 Difference]: Start difference. First operand 2297 states and 3631 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2024-10-15 14:52:09,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:52:09,507 INFO L93 Difference]: Finished difference Result 2587 states and 4085 transitions. [2024-10-15 14:52:09,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-15 14:52:09,507 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 159 [2024-10-15 14:52:09,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:52:09,518 INFO L225 Difference]: With dead ends: 2587 [2024-10-15 14:52:09,518 INFO L226 Difference]: Without dead ends: 2582 [2024-10-15 14:52:09,519 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=202, Invalid=1130, Unknown=0, NotChecked=0, Total=1332 [2024-10-15 14:52:09,519 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 72 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-15 14:52:09,519 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 587 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-15 14:52:09,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2582 states. [2024-10-15 14:52:15,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2582 to 2535. [2024-10-15 14:52:15,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2535 states, 1309 states have (on average 1.2880061115355232) internal successors, (1686), 1348 states have internal predecessors, (1686), 1169 states have call successors, (1169), 58 states have call predecessors, (1169), 56 states have return successors, (1167), 1128 states have call predecessors, (1167), 1167 states have call successors, (1167) [2024-10-15 14:52:15,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2535 states to 2535 states and 4022 transitions. [2024-10-15 14:52:15,306 INFO L78 Accepts]: Start accepts. Automaton has 2535 states and 4022 transitions. Word has length 159 [2024-10-15 14:52:15,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:52:15,306 INFO L471 AbstractCegarLoop]: Abstraction has 2535 states and 4022 transitions. [2024-10-15 14:52:15,307 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2024-10-15 14:52:15,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:52:15,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2535 states and 4022 transitions. [2024-10-15 14:52:15,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2024-10-15 14:52:15,310 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:52:15,310 INFO L215 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:52:15,325 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-10-15 14:52:15,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-10-15 14:52:15,511 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:52:15,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:52:15,511 INFO L85 PathProgramCache]: Analyzing trace with hash -998768174, now seen corresponding path program 10 times [2024-10-15 14:52:15,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:52:15,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458018717] [2024-10-15 14:52:15,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:52:15,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:52:15,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:52:15,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [827795147] [2024-10-15 14:52:15,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:52:15,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:52:15,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:52:15,545 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:52:15,546 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-15 14:52:15,616 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:52:15,616 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:52:15,618 INFO L255 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-10-15 14:52:15,621 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:52:16,833 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 96 proven. 100 refuted. 0 times theorem prover too weak. 718 trivial. 0 not checked. [2024-10-15 14:52:16,834 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:52:28,235 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 90 proven. 97 refuted. 0 times theorem prover too weak. 727 trivial. 0 not checked. [2024-10-15 14:52:28,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:52:28,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458018717] [2024-10-15 14:52:28,235 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:52:28,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827795147] [2024-10-15 14:52:28,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827795147] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:52:28,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:52:28,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 44 [2024-10-15 14:52:28,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301588327] [2024-10-15 14:52:28,236 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:52:28,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-10-15 14:52:28,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:52:28,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-10-15 14:52:28,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1601, Unknown=0, NotChecked=0, Total=1892 [2024-10-15 14:52:28,237 INFO L87 Difference]: Start difference. First operand 2535 states and 4022 transitions. Second operand has 44 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 states have internal predecessors, (86), 15 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (47), 13 states have call predecessors, (47), 13 states have call successors, (47) [2024-10-15 14:52:43,973 WARN L286 SmtUtils]: Spent 5.07s on a formula simplification that was a NOOP. DAG size: 156 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)