./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/string_concat-noarr.i --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ca4ee3dd Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-invgen/string_concat-noarr.i -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 30a4b942034eaa47a8fcc8fdf4549d1d63a9a60d59b585da2a353c9626604750 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-ca4ee3d-m [2024-09-20 18:46:11,855 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 18:46:11,937 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 18:46:11,942 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 18:46:11,944 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 18:46:11,969 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 18:46:11,970 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 18:46:11,970 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 18:46:11,971 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 18:46:11,972 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 18:46:11,973 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 18:46:11,973 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 18:46:11,974 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 18:46:11,974 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 18:46:11,975 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 18:46:11,975 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 18:46:11,976 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 18:46:11,976 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 18:46:11,976 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 18:46:11,976 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 18:46:11,977 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 18:46:11,977 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 18:46:11,978 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 18:46:11,978 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 18:46:11,978 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 18:46:11,978 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 18:46:11,979 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 18:46:11,979 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 18:46:11,980 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 18:46:11,980 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 18:46:11,980 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 18:46:11,980 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 18:46:11,981 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 18:46:11,981 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 18:46:11,981 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 18:46:11,982 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 18:46:11,982 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 18:46:11,982 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 18:46:11,983 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 18:46:11,983 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 18:46:11,983 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 18:46:11,983 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 18:46:11,984 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 30a4b942034eaa47a8fcc8fdf4549d1d63a9a60d59b585da2a353c9626604750 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 18:46:12,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 18:46:12,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 18:46:12,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 18:46:12,256 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 18:46:12,257 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 18:46:12,258 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-invgen/string_concat-noarr.i [2024-09-20 18:46:13,713 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 18:46:13,887 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 18:46:13,888 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invgen/string_concat-noarr.i [2024-09-20 18:46:13,896 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/fe2913c3f/7144dfb476ef4f989cc8aff02ac0284d/FLAG6f18a359c [2024-09-20 18:46:13,911 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/fe2913c3f/7144dfb476ef4f989cc8aff02ac0284d [2024-09-20 18:46:13,914 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 18:46:13,915 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 18:46:13,917 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 18:46:13,918 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 18:46:13,923 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 18:46:13,924 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 06:46:13" (1/1) ... [2024-09-20 18:46:13,925 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3886180a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:46:13, skipping insertion in model container [2024-09-20 18:46:13,926 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 06:46:13" (1/1) ... [2024-09-20 18:46:13,946 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 18:46:14,101 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/loop-invgen/string_concat-noarr.i[893,906] [2024-09-20 18:46:14,112 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 18:46:14,120 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 18:46:14,133 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/loop-invgen/string_concat-noarr.i[893,906] [2024-09-20 18:46:14,136 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 18:46:14,148 INFO L204 MainTranslator]: Completed translation [2024-09-20 18:46:14,148 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:46:14 WrapperNode [2024-09-20 18:46:14,149 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 18:46:14,150 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 18:46:14,150 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 18:46:14,150 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 18:46:14,155 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:46:14" (1/1) ... [2024-09-20 18:46:14,159 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:46:14" (1/1) ... [2024-09-20 18:46:14,164 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 18:46:14,165 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 18:46:14,165 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 18:46:14,166 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 18:46:14,166 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 18:46:14,173 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:46:14" (1/1) ... [2024-09-20 18:46:14,173 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:46:14" (1/1) ... [2024-09-20 18:46:14,174 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:46:14" (1/1) ... [2024-09-20 18:46:14,188 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-20 18:46:14,188 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:46:14" (1/1) ... [2024-09-20 18:46:14,189 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:46:14" (1/1) ... [2024-09-20 18:46:14,191 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:46:14" (1/1) ... [2024-09-20 18:46:14,193 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:46:14" (1/1) ... [2024-09-20 18:46:14,194 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:46:14" (1/1) ... [2024-09-20 18:46:14,195 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:46:14" (1/1) ... [2024-09-20 18:46:14,196 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 18:46:14,198 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 18:46:14,198 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 18:46:14,199 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 18:46:14,199 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:46:14" (1/1) ... [2024-09-20 18:46:14,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 18:46:14,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:46:14,233 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-20 18:46:14,236 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-20 18:46:14,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 18:46:14,276 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 18:46:14,276 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 18:46:14,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 18:46:14,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 18:46:14,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 18:46:14,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 18:46:14,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 18:46:14,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 18:46:14,277 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 18:46:14,326 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 18:46:14,327 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 18:46:14,434 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-09-20 18:46:14,434 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 18:46:14,456 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 18:46:14,456 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-20 18:46:14,457 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 06:46:14 BoogieIcfgContainer [2024-09-20 18:46:14,457 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 18:46:14,460 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 18:46:14,460 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 18:46:14,463 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 18:46:14,463 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 06:46:13" (1/3) ... [2024-09-20 18:46:14,464 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd29541 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 06:46:14, skipping insertion in model container [2024-09-20 18:46:14,465 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:46:14" (2/3) ... [2024-09-20 18:46:14,466 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd29541 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 06:46:14, skipping insertion in model container [2024-09-20 18:46:14,466 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 06:46:14" (3/3) ... [2024-09-20 18:46:14,467 INFO L112 eAbstractionObserver]: Analyzing ICFG string_concat-noarr.i [2024-09-20 18:46:14,484 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 18:46:14,484 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 18:46:14,547 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 18:46:14,555 INFO L336 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@196b1c03, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 18:46:14,556 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 18:46:14,560 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:46:14,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-20 18:46:14,567 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:46:14,567 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:46:14,568 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:46:14,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:46:14,574 INFO L85 PathProgramCache]: Analyzing trace with hash 592432444, now seen corresponding path program 1 times [2024-09-20 18:46:14,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:46:14,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207367387] [2024-09-20 18:46:14,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:46:14,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:46:14,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:14,688 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:46:14,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:14,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:46:14,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:46:14,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207367387] [2024-09-20 18:46:14,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207367387] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:46:14,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:46:14,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 18:46:14,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62547678] [2024-09-20 18:46:14,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:46:14,705 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 18:46:14,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:46:14,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 18:46:14,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 18:46:14,725 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:46:14,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:46:14,748 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2024-09-20 18:46:14,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 18:46:14,750 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-09-20 18:46:14,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:46:14,755 INFO L225 Difference]: With dead ends: 39 [2024-09-20 18:46:14,755 INFO L226 Difference]: Without dead ends: 16 [2024-09-20 18:46:14,757 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 18:46:14,760 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:46:14,762 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:46:14,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-20 18:46:14,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-20 18:46:14,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:46:14,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2024-09-20 18:46:14,812 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2024-09-20 18:46:14,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:46:14,812 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2024-09-20 18:46:14,812 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:46:14,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:46:14,813 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2024-09-20 18:46:14,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-20 18:46:14,814 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:46:14,814 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:46:14,819 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 18:46:14,822 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:46:14,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:46:14,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1074985823, now seen corresponding path program 1 times [2024-09-20 18:46:14,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:46:14,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245469569] [2024-09-20 18:46:14,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:46:14,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:46:14,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:15,107 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:46:15,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:15,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:46:15,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:46:15,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245469569] [2024-09-20 18:46:15,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245469569] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:46:15,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:46:15,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 18:46:15,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082848306] [2024-09-20 18:46:15,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:46:15,124 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 18:46:15,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:46:15,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 18:46:15,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 18:46:15,127 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:46:15,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:46:15,195 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2024-09-20 18:46:15,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 18:46:15,196 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-09-20 18:46:15,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:46:15,197 INFO L225 Difference]: With dead ends: 27 [2024-09-20 18:46:15,197 INFO L226 Difference]: Without dead ends: 21 [2024-09-20 18:46:15,199 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 18:46:15,201 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:46:15,201 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:46:15,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-20 18:46:15,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2024-09-20 18:46:15,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:46:15,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2024-09-20 18:46:15,210 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2024-09-20 18:46:15,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:46:15,211 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2024-09-20 18:46:15,211 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:46:15,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:46:15,214 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2024-09-20 18:46:15,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-20 18:46:15,215 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:46:15,215 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:46:15,215 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 18:46:15,215 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:46:15,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:46:15,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1700612060, now seen corresponding path program 1 times [2024-09-20 18:46:15,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:46:15,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419612447] [2024-09-20 18:46:15,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:46:15,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:46:15,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:15,356 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:46:15,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:46:15,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:46:15,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419612447] [2024-09-20 18:46:15,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419612447] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:46:15,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711874298] [2024-09-20 18:46:15,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:46:15,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:46:15,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:46:15,365 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:46:15,367 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 18:46:15,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:15,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-20 18:46:15,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:46:15,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:46:15,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:46:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:46:15,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711874298] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:46:15,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:46:15,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-09-20 18:46:15,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604143480] [2024-09-20 18:46:15,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:46:15,585 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 18:46:15,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:46:15,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 18:46:15,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-09-20 18:46:15,586 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:46:15,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:46:15,669 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2024-09-20 18:46:15,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 18:46:15,670 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-09-20 18:46:15,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:46:15,671 INFO L225 Difference]: With dead ends: 50 [2024-09-20 18:46:15,672 INFO L226 Difference]: Without dead ends: 40 [2024-09-20 18:46:15,672 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2024-09-20 18:46:15,675 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:46:15,675 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 57 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:46:15,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-09-20 18:46:15,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2024-09-20 18:46:15,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:46:15,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2024-09-20 18:46:15,687 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 17 [2024-09-20 18:46:15,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:46:15,688 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2024-09-20 18:46:15,688 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:46:15,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:46:15,689 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2024-09-20 18:46:15,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-20 18:46:15,690 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:46:15,690 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:46:15,703 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-20 18:46:15,891 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:46:15,891 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:46:15,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:46:15,892 INFO L85 PathProgramCache]: Analyzing trace with hash -737179999, now seen corresponding path program 1 times [2024-09-20 18:46:15,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:46:15,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965288186] [2024-09-20 18:46:15,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:46:15,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:46:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:16,059 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:46:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:16,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:46:16,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:46:16,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965288186] [2024-09-20 18:46:16,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965288186] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:46:16,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030220841] [2024-09-20 18:46:16,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:46:16,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:46:16,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:46:16,071 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:46:16,073 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 18:46:16,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:16,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-20 18:46:16,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:46:16,181 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:46:16,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:46:16,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:46:16,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030220841] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:46:16,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:46:16,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-09-20 18:46:16,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065859006] [2024-09-20 18:46:16,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:46:16,292 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-20 18:46:16,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:46:16,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-20 18:46:16,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2024-09-20 18:46:16,295 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:46:16,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:46:16,423 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2024-09-20 18:46:16,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-20 18:46:16,424 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2024-09-20 18:46:16,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:46:16,426 INFO L225 Difference]: With dead ends: 94 [2024-09-20 18:46:16,426 INFO L226 Difference]: Without dead ends: 78 [2024-09-20 18:46:16,427 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2024-09-20 18:46:16,427 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 49 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:46:16,428 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 81 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:46:16,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-20 18:46:16,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 51. [2024-09-20 18:46:16,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:46:16,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2024-09-20 18:46:16,438 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 23 [2024-09-20 18:46:16,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:46:16,438 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2024-09-20 18:46:16,438 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:46:16,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:46:16,439 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2024-09-20 18:46:16,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-20 18:46:16,440 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:46:16,441 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:46:16,454 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-20 18:46:16,641 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:46:16,641 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:46:16,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:46:16,642 INFO L85 PathProgramCache]: Analyzing trace with hash 57279201, now seen corresponding path program 2 times [2024-09-20 18:46:16,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:46:16,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926505466] [2024-09-20 18:46:16,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:46:16,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:46:16,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:16,883 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:46:16,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:16,887 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:46:16,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:46:16,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926505466] [2024-09-20 18:46:16,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926505466] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:46:16,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227387019] [2024-09-20 18:46:16,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:46:16,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:46:16,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:46:16,892 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:46:16,894 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 18:46:16,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:46:16,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:46:16,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-20 18:46:16,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:46:17,030 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:46:17,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:46:17,335 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:46:17,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227387019] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:46:17,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:46:17,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2024-09-20 18:46:17,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845315184] [2024-09-20 18:46:17,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:46:17,336 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-20 18:46:17,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:46:17,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-20 18:46:17,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=502, Unknown=0, NotChecked=0, Total=812 [2024-09-20 18:46:17,338 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 27 states have internal predecessors, (63), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:46:17,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:46:17,588 INFO L93 Difference]: Finished difference Result 214 states and 248 transitions. [2024-09-20 18:46:17,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-20 18:46:17,588 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 27 states have internal predecessors, (63), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2024-09-20 18:46:17,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:46:17,590 INFO L225 Difference]: With dead ends: 214 [2024-09-20 18:46:17,590 INFO L226 Difference]: Without dead ends: 186 [2024-09-20 18:46:17,591 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=316, Invalid=554, Unknown=0, NotChecked=0, Total=870 [2024-09-20 18:46:17,591 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 160 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:46:17,592 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 117 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:46:17,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-09-20 18:46:17,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 93. [2024-09-20 18:46:17,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.1477272727272727) internal successors, (101), 88 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:46:17,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2024-09-20 18:46:17,607 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 35 [2024-09-20 18:46:17,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:46:17,607 INFO L474 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2024-09-20 18:46:17,607 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 27 states have internal predecessors, (63), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:46:17,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:46:17,608 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2024-09-20 18:46:17,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-20 18:46:17,609 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:46:17,609 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:46:17,625 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 18:46:17,813 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:46:17,814 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:46:17,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:46:17,814 INFO L85 PathProgramCache]: Analyzing trace with hash -974860319, now seen corresponding path program 3 times [2024-09-20 18:46:17,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:46:17,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306234239] [2024-09-20 18:46:17,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:46:17,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:46:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:18,425 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:46:18,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:18,429 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:46:18,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:46:18,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306234239] [2024-09-20 18:46:18,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306234239] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:46:18,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011141582] [2024-09-20 18:46:18,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:46:18,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:46:18,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:46:18,432 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:46:18,434 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 18:46:18,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-09-20 18:46:18,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:46:18,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-20 18:46:18,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:46:18,648 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:46:18,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:46:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:46:19,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011141582] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:46:19,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:46:19,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2024-09-20 18:46:19,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785157009] [2024-09-20 18:46:19,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:46:19,524 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-09-20 18:46:19,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:46:19,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-09-20 18:46:19,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1186, Invalid=1570, Unknown=0, NotChecked=0, Total=2756 [2024-09-20 18:46:19,528 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 51 states have internal predecessors, (111), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:46:20,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:46:20,081 INFO L93 Difference]: Finished difference Result 562 states and 632 transitions. [2024-09-20 18:46:20,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-09-20 18:46:20,082 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 51 states have internal predecessors, (111), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2024-09-20 18:46:20,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:46:20,085 INFO L225 Difference]: With dead ends: 562 [2024-09-20 18:46:20,085 INFO L226 Difference]: Without dead ends: 510 [2024-09-20 18:46:20,087 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1192, Invalid=1670, Unknown=0, NotChecked=0, Total=2862 [2024-09-20 18:46:20,088 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 387 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 18:46:20,088 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 205 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 18:46:20,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2024-09-20 18:46:20,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 177. [2024-09-20 18:46:20,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.1453488372093024) internal successors, (197), 172 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:46:20,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 201 transitions. [2024-09-20 18:46:20,116 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 201 transitions. Word has length 59 [2024-09-20 18:46:20,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:46:20,116 INFO L474 AbstractCegarLoop]: Abstraction has 177 states and 201 transitions. [2024-09-20 18:46:20,116 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 51 states have internal predecessors, (111), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:46:20,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:46:20,117 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 201 transitions. [2024-09-20 18:46:20,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-09-20 18:46:20,119 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:46:20,120 INFO L216 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:46:20,144 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 18:46:20,320 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:46:20,320 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:46:20,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:46:20,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1348256799, now seen corresponding path program 4 times [2024-09-20 18:46:20,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:46:20,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336839396] [2024-09-20 18:46:20,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:46:20,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:46:20,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:22,109 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:46:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:22,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 0 proven. 1104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:46:22,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:46:22,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336839396] [2024-09-20 18:46:22,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336839396] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:46:22,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217841934] [2024-09-20 18:46:22,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 18:46:22,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:46:22,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:46:22,116 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:46:22,118 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 18:46:22,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 18:46:22,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:46:22,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-20 18:46:22,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:46:22,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 0 proven. 1104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:46:22,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:46:25,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 0 proven. 1104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:46:25,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217841934] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:46:25,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:46:25,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2024-09-20 18:46:25,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25104646] [2024-09-20 18:46:25,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:46:25,164 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2024-09-20 18:46:25,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:46:25,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2024-09-20 18:46:25,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4666, Invalid=5434, Unknown=0, NotChecked=0, Total=10100 [2024-09-20 18:46:25,170 INFO L87 Difference]: Start difference. First operand 177 states and 201 transitions. Second operand has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 99 states have internal predecessors, (207), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:46:26,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:46:26,899 INFO L93 Difference]: Finished difference Result 1690 states and 1832 transitions. [2024-09-20 18:46:26,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2024-09-20 18:46:26,900 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 99 states have internal predecessors, (207), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2024-09-20 18:46:26,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:46:26,906 INFO L225 Difference]: With dead ends: 1690 [2024-09-20 18:46:26,907 INFO L226 Difference]: Without dead ends: 1590 [2024-09-20 18:46:26,910 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 165 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4672, Invalid=5630, Unknown=0, NotChecked=0, Total=10302 [2024-09-20 18:46:26,911 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1061 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1061 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 18:46:26,911 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1061 Valid, 320 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 18:46:26,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1590 states. [2024-09-20 18:46:26,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1590 to 345. [2024-09-20 18:46:26,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 340 states have (on average 1.1441176470588235) internal successors, (389), 340 states have internal predecessors, (389), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:46:26,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 393 transitions. [2024-09-20 18:46:27,001 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 393 transitions. Word has length 107 [2024-09-20 18:46:27,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:46:27,001 INFO L474 AbstractCegarLoop]: Abstraction has 345 states and 393 transitions. [2024-09-20 18:46:27,002 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 99 states have internal predecessors, (207), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:46:27,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:46:27,002 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 393 transitions. [2024-09-20 18:46:27,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2024-09-20 18:46:27,005 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:46:27,005 INFO L216 NwaCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:46:27,019 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-20 18:46:27,209 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-20 18:46:27,210 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:46:27,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:46:27,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1794155551, now seen corresponding path program 5 times [2024-09-20 18:46:27,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:46:27,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246476895] [2024-09-20 18:46:27,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:46:27,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:46:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:32,438 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:46:32,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:32,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 4512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:46:32,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:46:32,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246476895] [2024-09-20 18:46:32,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246476895] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:46:32,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897150712] [2024-09-20 18:46:32,444 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 18:46:32,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:46:32,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:46:32,448 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:46:32,449 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 18:46:32,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2024-09-20 18:46:32,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:46:32,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-09-20 18:46:32,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:46:32,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 4512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:46:32,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:46:41,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 4512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:46:41,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897150712] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:46:41,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:46:41,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99, 99] total 197 [2024-09-20 18:46:41,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352596272] [2024-09-20 18:46:41,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:46:41,875 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 197 states [2024-09-20 18:46:41,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:46:41,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2024-09-20 18:46:41,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18538, Invalid=20074, Unknown=0, NotChecked=0, Total=38612 [2024-09-20 18:46:41,886 INFO L87 Difference]: Start difference. First operand 345 states and 393 transitions. Second operand has 197 states, 197 states have (on average 2.0253807106598987) internal successors, (399), 195 states have internal predecessors, (399), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:46:55,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:46:55,601 INFO L93 Difference]: Finished difference Result 5674 states and 5960 transitions. [2024-09-20 18:46:55,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2024-09-20 18:46:55,602 INFO L78 Accepts]: Start accepts. Automaton has has 197 states, 197 states have (on average 2.0253807106598987) internal successors, (399), 195 states have internal predecessors, (399), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2024-09-20 18:46:55,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:46:55,621 INFO L225 Difference]: With dead ends: 5674 [2024-09-20 18:46:55,621 INFO L226 Difference]: Without dead ends: 5478 [2024-09-20 18:46:55,625 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 309 SyntacticMatches, 2 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=18544, Invalid=20462, Unknown=0, NotChecked=0, Total=39006 [2024-09-20 18:46:55,626 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2830 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 1193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2830 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 2000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1193 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:46:55,626 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2830 Valid, 547 Invalid, 2000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1193 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-20 18:46:55,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5478 states. [2024-09-20 18:46:55,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5478 to 681. [2024-09-20 18:46:55,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 676 states have (on average 1.143491124260355) internal successors, (773), 676 states have internal predecessors, (773), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:46:55,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 777 transitions. [2024-09-20 18:46:55,931 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 777 transitions. Word has length 203 [2024-09-20 18:46:55,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:46:55,932 INFO L474 AbstractCegarLoop]: Abstraction has 681 states and 777 transitions. [2024-09-20 18:46:55,932 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 197 states, 197 states have (on average 2.0253807106598987) internal successors, (399), 195 states have internal predecessors, (399), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:46:55,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:46:55,933 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 777 transitions. [2024-09-20 18:46:55,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2024-09-20 18:46:55,939 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:46:55,939 INFO L216 NwaCegarLoop]: trace histogram [96, 96, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:46:55,956 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 18:46:56,139 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:46:56,140 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:46:56,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:46:56,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1308312607, now seen corresponding path program 6 times [2024-09-20 18:46:56,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:46:56,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590379200] [2024-09-20 18:46:56,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:46:56,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:46:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:47:13,936 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:47:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:47:13,945 INFO L134 CoverageAnalysis]: Checked inductivity of 18240 backedges. 0 proven. 18240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:47:13,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:47:13,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590379200] [2024-09-20 18:47:13,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590379200] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:47:13,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097778480] [2024-09-20 18:47:13,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 18:47:13,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:47:13,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:47:13,946 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:47:13,947 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 18:47:14,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 96 check-sat command(s) [2024-09-20 18:47:14,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:47:14,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 1375 conjuncts, 197 conjuncts are in the unsatisfiable core [2024-09-20 18:47:14,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:47:14,774 INFO L134 CoverageAnalysis]: Checked inductivity of 18240 backedges. 0 proven. 18240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:47:14,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:47:27,714 INFO L134 CoverageAnalysis]: Checked inductivity of 18240 backedges. 0 proven. 18240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:47:27,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097778480] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:47:27,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:47:27,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [195, 195, 195] total 207 [2024-09-20 18:47:27,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401042938] [2024-09-20 18:47:27,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:47:27,716 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 207 states [2024-09-20 18:47:27,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:47:27,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 207 interpolants. [2024-09-20 18:47:27,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20513, Invalid=22129, Unknown=0, NotChecked=0, Total=42642 [2024-09-20 18:47:27,727 INFO L87 Difference]: Start difference. First operand 681 states and 777 transitions. Second operand has 207 states, 207 states have (on average 2.111111111111111) internal successors, (437), 205 states have internal predecessors, (437), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:47:43,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:47:43,310 INFO L93 Difference]: Finished difference Result 1800 states and 2010 transitions. [2024-09-20 18:47:43,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2024-09-20 18:47:43,311 INFO L78 Accepts]: Start accepts. Automaton has has 207 states, 207 states have (on average 2.111111111111111) internal successors, (437), 205 states have internal predecessors, (437), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 395 [2024-09-20 18:47:43,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:47:43,318 INFO L225 Difference]: With dead ends: 1800 [2024-09-20 18:47:43,318 INFO L226 Difference]: Without dead ends: 1776 [2024-09-20 18:47:43,321 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 987 GetRequests, 599 SyntacticMatches, 182 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19661 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=20519, Invalid=22537, Unknown=0, NotChecked=0, Total=43056 [2024-09-20 18:47:43,321 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2240 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 1298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2240 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 2057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1298 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:47:43,322 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2240 Valid, 485 Invalid, 2057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1298 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-20 18:47:43,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2024-09-20 18:47:43,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 713. [2024-09-20 18:47:43,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 708 states have (on average 1.1426553672316384) internal successors, (809), 708 states have internal predecessors, (809), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:47:43,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 813 transitions. [2024-09-20 18:47:43,616 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 813 transitions. Word has length 395 [2024-09-20 18:47:43,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:47:43,617 INFO L474 AbstractCegarLoop]: Abstraction has 713 states and 813 transitions. [2024-09-20 18:47:43,617 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 207 states, 207 states have (on average 2.111111111111111) internal successors, (437), 205 states have internal predecessors, (437), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:47:43,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:47:43,618 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 813 transitions. [2024-09-20 18:47:43,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2024-09-20 18:47:43,624 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:47:43,624 INFO L216 NwaCegarLoop]: trace histogram [102, 101, 100, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:47:43,643 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-20 18:47:43,824 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:47:43,825 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:47:43,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:47:43,825 INFO L85 PathProgramCache]: Analyzing trace with hash 101893015, now seen corresponding path program 7 times [2024-09-20 18:47:43,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:47:43,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263146412] [2024-09-20 18:47:43,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:47:43,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:47:44,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:47:49,666 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:47:49,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:47:49,669 INFO L134 CoverageAnalysis]: Checked inductivity of 20202 backedges. 10100 proven. 202 refuted. 0 times theorem prover too weak. 9900 trivial. 0 not checked. [2024-09-20 18:47:49,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:47:49,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263146412] [2024-09-20 18:47:49,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263146412] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:47:49,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474666364] [2024-09-20 18:47:49,670 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 18:47:49,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:47:49,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:47:49,671 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:47:49,672 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 18:47:49,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:47:49,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 1447 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-09-20 18:47:49,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:47:50,130 INFO L134 CoverageAnalysis]: Checked inductivity of 20202 backedges. 10302 proven. 0 refuted. 0 times theorem prover too weak. 9900 trivial. 0 not checked. [2024-09-20 18:47:50,131 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 18:47:50,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474666364] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:47:50,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 18:47:50,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [104] total 105 [2024-09-20 18:47:50,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848988118] [2024-09-20 18:47:50,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:47:50,132 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2024-09-20 18:47:50,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:47:50,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2024-09-20 18:47:50,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5359, Invalid=5561, Unknown=0, NotChecked=0, Total=10920 [2024-09-20 18:47:50,136 INFO L87 Difference]: Start difference. First operand 713 states and 813 transitions. Second operand has 104 states, 104 states have (on average 2.0576923076923075) internal successors, (214), 104 states have internal predecessors, (214), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:48:08,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:48:08,520 INFO L93 Difference]: Finished difference Result 20711 states and 20811 transitions. [2024-09-20 18:48:08,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2024-09-20 18:48:08,521 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0576923076923075) internal successors, (214), 104 states have internal predecessors, (214), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 415 [2024-09-20 18:48:08,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:48:08,532 INFO L225 Difference]: With dead ends: 20711 [2024-09-20 18:48:08,532 INFO L226 Difference]: Without dead ends: 0 [2024-09-20 18:48:08,563 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5359, Invalid=5561, Unknown=0, NotChecked=0, Total=10920 [2024-09-20 18:48:08,564 INFO L434 NwaCegarLoop]: 110 mSDtfsCounter, 0 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:48:08,565 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 545 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:48:08,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-20 18:48:08,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-20 18:48:08,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 18:48:08,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-20 18:48:08,578 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 415 [2024-09-20 18:48:08,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:48:08,579 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-20 18:48:08,579 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0576923076923075) internal successors, (214), 104 states have internal predecessors, (214), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:48:08,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:48:08,580 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-20 18:48:08,580 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-20 18:48:08,583 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-20 18:48:08,603 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-20 18:48:08,783 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:48:08,787 INFO L408 BasicCegarLoop]: Path program histogram: [7, 1, 1, 1] [2024-09-20 18:48:08,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.