./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 5aa72773233f17156d62ec9c7729aefdd69e77cc68e9bdd6e006eaf36895d27a --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-13 21:54:34,710 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 21:54:34,757 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 21:54:34,762 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 21:54:34,764 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 21:54:34,787 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 21:54:34,789 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 21:54:34,789 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 21:54:34,790 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 21:54:34,791 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 21:54:34,792 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 21:54:34,792 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 21:54:34,792 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 21:54:34,792 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 21:54:34,793 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 21:54:34,794 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 21:54:34,794 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 21:54:34,795 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 21:54:34,795 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 21:54:34,795 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 21:54:34,795 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 21:54:34,798 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 21:54:34,798 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 21:54:34,798 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 21:54:34,798 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 21:54:34,798 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 21:54:34,799 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 21:54:34,799 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 21:54:34,799 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 21:54:34,799 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 21:54:34,799 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 21:54:34,800 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 21:54:34,800 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 21:54:34,800 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 21:54:34,800 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 21:54:34,800 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 21:54:34,800 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 21:54:34,801 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 21:54:34,801 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 21:54:34,801 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 21:54:34,801 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 21:54:34,802 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 21:54:34,803 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/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5aa72773233f17156d62ec9c7729aefdd69e77cc68e9bdd6e006eaf36895d27a [2024-10-13 21:54:35,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 21:54:35,078 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 21:54:35,080 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 21:54:35,081 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 21:54:35,081 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 21:54:35,082 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i [2024-10-13 21:54:36,340 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 21:54:36,491 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 21:54:36,495 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i [2024-10-13 21:54:36,503 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81869c721/79c564e38b874f1d9e2c5536ec519c9b/FLAG4febafe24 [2024-10-13 21:54:36,528 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81869c721/79c564e38b874f1d9e2c5536ec519c9b [2024-10-13 21:54:36,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 21:54:36,548 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 21:54:36,553 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 21:54:36,553 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 21:54:36,558 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 21:54:36,561 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:54:36" (1/1) ... [2024-10-13 21:54:36,565 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@157abd58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:36, skipping insertion in model container [2024-10-13 21:54:36,565 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:54:36" (1/1) ... [2024-10-13 21:54:36,585 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 21:54:36,715 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i[823,836] [2024-10-13 21:54:36,743 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 21:54:36,750 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 21:54:36,758 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i[823,836] [2024-10-13 21:54:36,771 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 21:54:36,787 INFO L204 MainTranslator]: Completed translation [2024-10-13 21:54:36,788 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:36 WrapperNode [2024-10-13 21:54:36,788 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 21:54:36,789 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 21:54:36,789 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 21:54:36,789 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 21:54:36,794 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:36" (1/1) ... [2024-10-13 21:54:36,805 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:36" (1/1) ... [2024-10-13 21:54:36,825 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 117 [2024-10-13 21:54:36,825 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 21:54:36,826 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 21:54:36,826 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 21:54:36,826 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 21:54:36,834 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:36" (1/1) ... [2024-10-13 21:54:36,835 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:36" (1/1) ... [2024-10-13 21:54:36,837 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:36" (1/1) ... [2024-10-13 21:54:36,852 INFO L175 MemorySlicer]: Split 15 memory accesses to 2 slices as follows [2, 13]. 87 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-10-13 21:54:36,853 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:36" (1/1) ... [2024-10-13 21:54:36,853 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:36" (1/1) ... [2024-10-13 21:54:36,863 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:36" (1/1) ... [2024-10-13 21:54:36,867 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:36" (1/1) ... [2024-10-13 21:54:36,868 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:36" (1/1) ... [2024-10-13 21:54:36,868 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:36" (1/1) ... [2024-10-13 21:54:36,870 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 21:54:36,871 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 21:54:36,871 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 21:54:36,871 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 21:54:36,871 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:36" (1/1) ... [2024-10-13 21:54:36,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 21:54:36,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 21:54:36,906 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-13 21:54:36,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-13 21:54:36,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 21:54:36,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 21:54:36,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 21:54:36,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-13 21:54:36,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 21:54:36,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 21:54:36,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 21:54:36,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 21:54:36,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 21:54:36,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 21:54:36,952 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-13 21:54:36,952 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-13 21:54:36,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-13 21:54:37,007 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 21:54:37,009 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 21:54:37,208 INFO L? ?]: Removed 15 outVars from TransFormulas that were not future-live. [2024-10-13 21:54:37,208 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 21:54:37,240 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 21:54:37,240 INFO L314 CfgBuilder]: Removed 8 assume(true) statements. [2024-10-13 21:54:37,241 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:54:37 BoogieIcfgContainer [2024-10-13 21:54:37,241 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 21:54:37,242 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 21:54:37,243 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 21:54:37,245 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 21:54:37,245 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:54:36" (1/3) ... [2024-10-13 21:54:37,246 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c59ddc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:54:37, skipping insertion in model container [2024-10-13 21:54:37,246 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:36" (2/3) ... [2024-10-13 21:54:37,246 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c59ddc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:54:37, skipping insertion in model container [2024-10-13 21:54:37,246 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:54:37" (3/3) ... [2024-10-13 21:54:37,247 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-1.i [2024-10-13 21:54:37,260 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 21:54:37,261 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 21:54:37,311 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 21:54:37,316 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@58bcdc44, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 21:54:37,316 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-13 21:54:37,322 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 28 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-13 21:54:37,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-13 21:54:37,327 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 21:54:37,328 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 21:54:37,328 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 21:54:37,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 21:54:37,333 INFO L85 PathProgramCache]: Analyzing trace with hash 2038256253, now seen corresponding path program 1 times [2024-10-13 21:54:37,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 21:54:37,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698709783] [2024-10-13 21:54:37,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:54:37,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 21:54:37,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:54:37,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 21:54:37,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 21:54:37,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698709783] [2024-10-13 21:54:37,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698709783] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 21:54:37,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 21:54:37,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 21:54:37,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750875512] [2024-10-13 21:54:37,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 21:54:37,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 21:54:37,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 21:54:37,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 21:54:37,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 21:54:37,547 INFO L87 Difference]: Start difference. First operand has 33 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 28 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 21:54:37,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 21:54:37,587 INFO L93 Difference]: Finished difference Result 65 states and 108 transitions. [2024-10-13 21:54:37,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 21:54:37,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-13 21:54:37,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 21:54:37,595 INFO L225 Difference]: With dead ends: 65 [2024-10-13 21:54:37,595 INFO L226 Difference]: Without dead ends: 32 [2024-10-13 21:54:37,598 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 21:54:37,600 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 21:54:37,602 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 21:54:37,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-10-13 21:54:37,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-10-13 21:54:37,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-13 21:54:37,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2024-10-13 21:54:37,631 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 11 [2024-10-13 21:54:37,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 21:54:37,632 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2024-10-13 21:54:37,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 21:54:37,632 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2024-10-13 21:54:37,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-13 21:54:37,633 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 21:54:37,633 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 21:54:37,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 21:54:37,634 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 21:54:37,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 21:54:37,634 INFO L85 PathProgramCache]: Analyzing trace with hash -929420434, now seen corresponding path program 1 times [2024-10-13 21:54:37,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 21:54:37,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055083734] [2024-10-13 21:54:37,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:54:37,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 21:54:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:54:37,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 21:54:37,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 21:54:37,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055083734] [2024-10-13 21:54:37,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055083734] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 21:54:37,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857739552] [2024-10-13 21:54:37,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:54:37,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:54:37,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 21:54:37,716 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 21:54:37,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 21:54:37,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:54:37,782 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-13 21:54:37,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 21:54:37,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 21:54:37,803 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 21:54:37,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857739552] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 21:54:37,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 21:54:37,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-10-13 21:54:37,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446238939] [2024-10-13 21:54:37,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 21:54:37,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 21:54:37,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 21:54:37,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 21:54:37,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 21:54:37,807 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 21:54:37,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 21:54:37,847 INFO L93 Difference]: Finished difference Result 60 states and 81 transitions. [2024-10-13 21:54:37,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 21:54:37,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-13 21:54:37,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 21:54:37,849 INFO L225 Difference]: With dead ends: 60 [2024-10-13 21:54:37,849 INFO L226 Difference]: Without dead ends: 48 [2024-10-13 21:54:37,849 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 21:54:37,850 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 19 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 21:54:37,850 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 54 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 21:54:37,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-10-13 21:54:37,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2024-10-13 21:54:37,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-13 21:54:37,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2024-10-13 21:54:37,857 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 12 [2024-10-13 21:54:37,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 21:54:37,857 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2024-10-13 21:54:37,857 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 21:54:37,857 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2024-10-13 21:54:37,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-13 21:54:37,858 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 21:54:37,858 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 21:54:37,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-13 21:54:38,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:54:38,064 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 21:54:38,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 21:54:38,065 INFO L85 PathProgramCache]: Analyzing trace with hash -891550513, now seen corresponding path program 1 times [2024-10-13 21:54:38,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 21:54:38,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935609538] [2024-10-13 21:54:38,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:54:38,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 21:54:38,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:54:38,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 21:54:38,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 21:54:38,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935609538] [2024-10-13 21:54:38,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935609538] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 21:54:38,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617056369] [2024-10-13 21:54:38,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:54:38,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:54:38,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 21:54:38,147 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 21:54:38,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 21:54:38,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:54:38,200 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-13 21:54:38,201 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 21:54:38,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 21:54:38,225 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 21:54:38,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 21:54:38,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617056369] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 21:54:38,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 21:54:38,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-13 21:54:38,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126071024] [2024-10-13 21:54:38,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 21:54:38,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 21:54:38,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 21:54:38,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 21:54:38,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-13 21:54:38,249 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 21:54:38,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 21:54:38,282 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2024-10-13 21:54:38,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 21:54:38,282 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-10-13 21:54:38,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 21:54:38,285 INFO L225 Difference]: With dead ends: 66 [2024-10-13 21:54:38,285 INFO L226 Difference]: Without dead ends: 36 [2024-10-13 21:54:38,285 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-13 21:54:38,286 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 21:54:38,286 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 21:54:38,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-10-13 21:54:38,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-10-13 21:54:38,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-13 21:54:38,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2024-10-13 21:54:38,294 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 14 [2024-10-13 21:54:38,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 21:54:38,294 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2024-10-13 21:54:38,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 21:54:38,295 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2024-10-13 21:54:38,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-13 21:54:38,295 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 21:54:38,295 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 21:54:38,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-13 21:54:38,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-10-13 21:54:38,497 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 21:54:38,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 21:54:38,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1261296920, now seen corresponding path program 2 times [2024-10-13 21:54:38,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 21:54:38,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34146747] [2024-10-13 21:54:38,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:54:38,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 21:54:38,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:54:38,600 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-13 21:54:38,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 21:54:38,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34146747] [2024-10-13 21:54:38,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34146747] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 21:54:38,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 21:54:38,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 21:54:38,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10579397] [2024-10-13 21:54:38,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 21:54:38,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 21:54:38,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 21:54:38,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 21:54:38,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 21:54:38,605 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 21:54:38,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 21:54:38,669 INFO L93 Difference]: Finished difference Result 82 states and 113 transitions. [2024-10-13 21:54:38,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 21:54:38,691 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-10-13 21:54:38,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 21:54:38,692 INFO L225 Difference]: With dead ends: 82 [2024-10-13 21:54:38,692 INFO L226 Difference]: Without dead ends: 54 [2024-10-13 21:54:38,693 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 21:54:38,693 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 25 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 21:54:38,693 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 56 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 21:54:38,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-13 21:54:38,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2024-10-13 21:54:38,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-13 21:54:38,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2024-10-13 21:54:38,709 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 17 [2024-10-13 21:54:38,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 21:54:38,709 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2024-10-13 21:54:38,709 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 21:54:38,710 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2024-10-13 21:54:38,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-13 21:54:38,710 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 21:54:38,710 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 21:54:38,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 21:54:38,710 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 21:54:38,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 21:54:38,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1641264908, now seen corresponding path program 1 times [2024-10-13 21:54:38,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 21:54:38,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788867670] [2024-10-13 21:54:38,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:54:38,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 21:54:38,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:54:38,844 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-13 21:54:38,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 21:54:38,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788867670] [2024-10-13 21:54:38,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788867670] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 21:54:38,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 21:54:38,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 21:54:38,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174689283] [2024-10-13 21:54:38,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 21:54:38,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 21:54:38,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 21:54:38,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 21:54:38,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 21:54:38,848 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 21:54:38,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 21:54:38,906 INFO L93 Difference]: Finished difference Result 79 states and 108 transitions. [2024-10-13 21:54:38,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 21:54:38,907 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-10-13 21:54:38,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 21:54:38,908 INFO L225 Difference]: With dead ends: 79 [2024-10-13 21:54:38,908 INFO L226 Difference]: Without dead ends: 51 [2024-10-13 21:54:38,909 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 21:54:38,910 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 21:54:38,910 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 62 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 21:54:38,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-10-13 21:54:38,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2024-10-13 21:54:38,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.325) internal successors, (53), 40 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-13 21:54:38,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2024-10-13 21:54:38,918 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 20 [2024-10-13 21:54:38,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 21:54:38,918 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2024-10-13 21:54:38,918 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 21:54:38,918 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2024-10-13 21:54:38,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-13 21:54:38,919 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 21:54:38,919 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 21:54:38,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-13 21:54:38,919 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 21:54:38,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 21:54:38,922 INFO L85 PathProgramCache]: Analyzing trace with hash -821471327, now seen corresponding path program 1 times [2024-10-13 21:54:38,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 21:54:38,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121086676] [2024-10-13 21:54:38,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:54:38,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 21:54:38,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:54:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 21:54:38,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 21:54:38,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121086676] [2024-10-13 21:54:38,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121086676] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 21:54:38,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157190785] [2024-10-13 21:54:38,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:54:38,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:54:38,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 21:54:39,000 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 21:54:39,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 21:54:39,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:54:39,054 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 21:54:39,055 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 21:54:39,071 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 21:54:39,075 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 21:54:39,119 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 21:54:39,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157190785] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 21:54:39,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 21:54:39,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-13 21:54:39,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918948764] [2024-10-13 21:54:39,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 21:54:39,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-13 21:54:39,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 21:54:39,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-13 21:54:39,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-13 21:54:39,121 INFO L87 Difference]: Start difference. First operand 45 states and 59 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 21:54:39,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 21:54:39,143 INFO L93 Difference]: Finished difference Result 90 states and 123 transitions. [2024-10-13 21:54:39,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-13 21:54:39,143 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-10-13 21:54:39,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 21:54:39,144 INFO L225 Difference]: With dead ends: 90 [2024-10-13 21:54:39,144 INFO L226 Difference]: Without dead ends: 51 [2024-10-13 21:54:39,144 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-13 21:54:39,145 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 21:54:39,145 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 21:54:39,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-10-13 21:54:39,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-10-13 21:54:39,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 46 states have internal predecessors, (59), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-13 21:54:39,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2024-10-13 21:54:39,150 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 21 [2024-10-13 21:54:39,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 21:54:39,150 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2024-10-13 21:54:39,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 21:54:39,150 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2024-10-13 21:54:39,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-13 21:54:39,151 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 21:54:39,151 INFO L215 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 21:54:39,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-13 21:54:39,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:54:39,352 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 21:54:39,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 21:54:39,352 INFO L85 PathProgramCache]: Analyzing trace with hash 844164673, now seen corresponding path program 2 times [2024-10-13 21:54:39,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 21:54:39,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714155826] [2024-10-13 21:54:39,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:54:39,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 21:54:39,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:54:39,509 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 21:54:39,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 21:54:39,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714155826] [2024-10-13 21:54:39,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714155826] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 21:54:39,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298138215] [2024-10-13 21:54:39,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 21:54:39,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:54:39,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 21:54:39,512 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 21:54:39,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 21:54:39,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-13 21:54:39,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 21:54:39,569 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-13 21:54:39,570 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 21:54:39,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-13 21:54:39,708 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-10-13 21:54:39,708 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 21:54:39,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298138215] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 21:54:39,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 21:54:39,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 18 [2024-10-13 21:54:39,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910818986] [2024-10-13 21:54:39,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 21:54:39,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 21:54:39,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 21:54:39,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 21:54:39,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2024-10-13 21:54:39,711 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 21:54:39,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 21:54:39,825 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2024-10-13 21:54:39,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 21:54:39,826 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-10-13 21:54:39,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 21:54:39,827 INFO L225 Difference]: With dead ends: 63 [2024-10-13 21:54:39,827 INFO L226 Difference]: Without dead ends: 61 [2024-10-13 21:54:39,827 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2024-10-13 21:54:39,827 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 45 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 21:54:39,828 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 123 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 21:54:39,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-10-13 21:54:39,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2024-10-13 21:54:39,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 50 states have internal predecessors, (62), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-13 21:54:39,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2024-10-13 21:54:39,837 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 27 [2024-10-13 21:54:39,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 21:54:39,838 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2024-10-13 21:54:39,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 21:54:39,838 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2024-10-13 21:54:39,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-13 21:54:39,839 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 21:54:39,839 INFO L215 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 21:54:39,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-13 21:54:40,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:54:40,040 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 21:54:40,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 21:54:40,041 INFO L85 PathProgramCache]: Analyzing trace with hash 925196036, now seen corresponding path program 1 times [2024-10-13 21:54:40,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 21:54:40,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109954085] [2024-10-13 21:54:40,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:54:40,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 21:54:40,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:54:40,186 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-13 21:54:40,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:54:40,189 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 21:54:40,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 21:54:40,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109954085] [2024-10-13 21:54:40,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109954085] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 21:54:40,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915145809] [2024-10-13 21:54:40,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:54:40,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:54:40,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 21:54:40,191 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 21:54:40,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 21:54:40,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:54:40,248 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-13 21:54:40,250 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 21:54:40,272 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-13 21:54:40,272 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 21:54:40,452 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 21:54:40,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915145809] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 21:54:40,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 21:54:40,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 25 [2024-10-13 21:54:40,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478169071] [2024-10-13 21:54:40,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 21:54:40,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-13 21:54:40,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 21:54:40,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-13 21:54:40,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-10-13 21:54:40,454 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-13 21:54:40,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 21:54:40,497 INFO L93 Difference]: Finished difference Result 112 states and 151 transitions. [2024-10-13 21:54:40,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-13 21:54:40,497 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2024-10-13 21:54:40,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 21:54:40,499 INFO L225 Difference]: With dead ends: 112 [2024-10-13 21:54:40,499 INFO L226 Difference]: Without dead ends: 68 [2024-10-13 21:54:40,499 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-10-13 21:54:40,500 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 21:54:40,501 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 142 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 21:54:40,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-10-13 21:54:40,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2024-10-13 21:54:40,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 62 states have internal predecessors, (74), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-13 21:54:40,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2024-10-13 21:54:40,514 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 34 [2024-10-13 21:54:40,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 21:54:40,516 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2024-10-13 21:54:40,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-13 21:54:40,516 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2024-10-13 21:54:40,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-13 21:54:40,517 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 21:54:40,517 INFO L215 NwaCegarLoop]: trace histogram [22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 21:54:40,531 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-13 21:54:40,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:54:40,718 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 21:54:40,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 21:54:40,719 INFO L85 PathProgramCache]: Analyzing trace with hash -2011549244, now seen corresponding path program 2 times [2024-10-13 21:54:40,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 21:54:40,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757490323] [2024-10-13 21:54:40,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:54:40,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 21:54:40,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:54:41,234 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-10-13 21:54:41,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:54:41,237 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 2 proven. 253 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 21:54:41,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 21:54:41,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757490323] [2024-10-13 21:54:41,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757490323] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 21:54:41,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060181579] [2024-10-13 21:54:41,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 21:54:41,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:54:41,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 21:54:41,240 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 21:54:41,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-13 21:54:41,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 21:54:41,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 21:54:41,322 INFO L255 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-13 21:54:41,323 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 21:54:41,363 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-13 21:54:41,363 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 21:54:42,012 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 2 proven. 253 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 21:54:42,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060181579] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 21:54:42,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 21:54:42,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 25] total 49 [2024-10-13 21:54:42,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089249641] [2024-10-13 21:54:42,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 21:54:42,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-10-13 21:54:42,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 21:54:42,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-10-13 21:54:42,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-10-13 21:54:42,015 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 49 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 49 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-13 21:54:42,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 21:54:42,070 INFO L93 Difference]: Finished difference Result 136 states and 187 transitions. [2024-10-13 21:54:42,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-10-13 21:54:42,070 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 49 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2024-10-13 21:54:42,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 21:54:42,071 INFO L225 Difference]: With dead ends: 136 [2024-10-13 21:54:42,071 INFO L226 Difference]: Without dead ends: 92 [2024-10-13 21:54:42,072 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-10-13 21:54:42,072 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 21:54:42,073 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 212 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 21:54:42,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-10-13 21:54:42,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2024-10-13 21:54:42,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 85 states have (on average 1.1529411764705881) internal successors, (98), 86 states have internal predecessors, (98), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-13 21:54:42,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2024-10-13 21:54:42,079 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 46 [2024-10-13 21:54:42,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 21:54:42,079 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2024-10-13 21:54:42,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 49 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-13 21:54:42,080 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2024-10-13 21:54:42,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-10-13 21:54:42,081 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 21:54:42,081 INFO L215 NwaCegarLoop]: trace histogram [46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 21:54:42,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-13 21:54:42,284 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:54:42,285 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 21:54:42,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 21:54:42,286 INFO L85 PathProgramCache]: Analyzing trace with hash -519997628, now seen corresponding path program 3 times [2024-10-13 21:54:42,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 21:54:42,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558030046] [2024-10-13 21:54:42,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:54:42,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 21:54:42,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:54:43,828 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-10-13 21:54:43,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:54:43,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 2 proven. 1081 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 21:54:43,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 21:54:43,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558030046] [2024-10-13 21:54:43,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558030046] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 21:54:43,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117656714] [2024-10-13 21:54:43,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 21:54:43,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:54:43,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 21:54:43,834 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 21:54:43,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-13 21:54:43,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-13 21:54:43,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 21:54:43,915 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-13 21:54:43,917 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 21:54:43,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1085 trivial. 0 not checked. [2024-10-13 21:54:43,961 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 21:54:44,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1083 trivial. 0 not checked. [2024-10-13 21:54:44,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117656714] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 21:54:44,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 21:54:44,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 4, 4] total 51 [2024-10-13 21:54:44,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170582795] [2024-10-13 21:54:44,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 21:54:44,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-10-13 21:54:44,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 21:54:44,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-10-13 21:54:44,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=1370, Unknown=0, NotChecked=0, Total=2550 [2024-10-13 21:54:44,014 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand has 51 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 51 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-13 21:54:44,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 21:54:44,121 INFO L93 Difference]: Finished difference Result 145 states and 179 transitions. [2024-10-13 21:54:44,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-10-13 21:54:44,121 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 51 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 70 [2024-10-13 21:54:44,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 21:54:44,122 INFO L225 Difference]: With dead ends: 145 [2024-10-13 21:54:44,122 INFO L226 Difference]: Without dead ends: 101 [2024-10-13 21:54:44,123 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1184, Invalid=1468, Unknown=0, NotChecked=0, Total=2652 [2024-10-13 21:54:44,124 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 21:54:44,124 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 169 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 21:54:44,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-10-13 21:54:44,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2024-10-13 21:54:44,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 94 states have (on average 1.1808510638297873) internal successors, (111), 95 states have internal predecessors, (111), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-13 21:54:44,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 119 transitions. [2024-10-13 21:54:44,132 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 119 transitions. Word has length 70 [2024-10-13 21:54:44,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 21:54:44,133 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 119 transitions. [2024-10-13 21:54:44,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 51 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-13 21:54:44,133 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 119 transitions. [2024-10-13 21:54:44,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-10-13 21:54:44,134 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 21:54:44,134 INFO L215 NwaCegarLoop]: trace histogram [47, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 21:54:44,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-13 21:54:44,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:54:44,335 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 21:54:44,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 21:54:44,336 INFO L85 PathProgramCache]: Analyzing trace with hash 274341311, now seen corresponding path program 1 times [2024-10-13 21:54:44,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 21:54:44,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135915376] [2024-10-13 21:54:44,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:54:44,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 21:54:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:54:45,925 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-10-13 21:54:45,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:54:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 2 proven. 1128 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 21:54:45,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 21:54:45,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135915376] [2024-10-13 21:54:45,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135915376] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 21:54:45,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678658269] [2024-10-13 21:54:45,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:54:45,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:54:45,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 21:54:45,936 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 21:54:45,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-13 21:54:46,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:54:46,144 INFO L255 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-10-13 21:54:46,147 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 21:54:46,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-13 21:54:46,213 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 21:54:48,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 2 proven. 1128 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 21:54:48,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678658269] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 21:54:48,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 21:54:48,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 50] total 99 [2024-10-13 21:54:48,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821656353] [2024-10-13 21:54:48,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 21:54:48,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2024-10-13 21:54:48,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 21:54:48,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2024-10-13 21:54:48,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2024-10-13 21:54:48,396 INFO L87 Difference]: Start difference. First operand 101 states and 119 transitions. Second operand has 99 states, 99 states have (on average 1.2121212121212122) internal successors, (120), 99 states have internal predecessors, (120), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-13 21:54:48,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 21:54:48,509 INFO L93 Difference]: Finished difference Result 202 states and 286 transitions. [2024-10-13 21:54:48,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2024-10-13 21:54:48,510 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.2121212121212122) internal successors, (120), 99 states have internal predecessors, (120), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 71 [2024-10-13 21:54:48,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 21:54:48,512 INFO L225 Difference]: With dead ends: 202 [2024-10-13 21:54:48,512 INFO L226 Difference]: Without dead ends: 150 [2024-10-13 21:54:48,514 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2024-10-13 21:54:48,515 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 21:54:48,515 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 21:54:48,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-10-13 21:54:48,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2024-10-13 21:54:48,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 143 states have (on average 1.118881118881119) internal successors, (160), 144 states have internal predecessors, (160), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-13 21:54:48,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 168 transitions. [2024-10-13 21:54:48,533 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 168 transitions. Word has length 71 [2024-10-13 21:54:48,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 21:54:48,534 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 168 transitions. [2024-10-13 21:54:48,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.2121212121212122) internal successors, (120), 99 states have internal predecessors, (120), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-13 21:54:48,534 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 168 transitions. [2024-10-13 21:54:48,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-10-13 21:54:48,535 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 21:54:48,535 INFO L215 NwaCegarLoop]: trace histogram [96, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 21:54:48,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-13 21:54:48,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-13 21:54:48,736 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 21:54:48,737 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 21:54:48,737 INFO L85 PathProgramCache]: Analyzing trace with hash -614969946, now seen corresponding path program 2 times [2024-10-13 21:54:48,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 21:54:48,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862064725] [2024-10-13 21:54:48,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:54:48,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 21:54:48,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:54:52,718 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-10-13 21:54:52,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:54:52,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4661 backedges. 2 proven. 4656 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 21:54:52,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 21:54:52,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862064725] [2024-10-13 21:54:52,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862064725] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 21:54:52,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457864218] [2024-10-13 21:54:52,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 21:54:52,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:54:52,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 21:54:52,726 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 21:54:52,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-13 21:54:52,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 21:54:52,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 21:54:52,988 INFO L255 TraceCheckSpWp]: Trace formula consists of 956 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-10-13 21:54:52,992 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 21:54:53,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4661 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-13 21:54:53,127 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 21:55:01,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4661 backedges. 2 proven. 4656 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 21:55:01,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457864218] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 21:55:01,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 21:55:01,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 98, 99] total 197 [2024-10-13 21:55:01,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105065660] [2024-10-13 21:55:01,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 21:55:01,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 197 states [2024-10-13 21:55:01,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 21:55:01,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2024-10-13 21:55:01,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2024-10-13 21:55:01,978 INFO L87 Difference]: Start difference. First operand 150 states and 168 transitions. Second operand has 197 states, 197 states have (on average 1.1065989847715736) internal successors, (218), 197 states have internal predecessors, (218), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-13 21:55:02,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 21:55:02,300 INFO L93 Difference]: Finished difference Result 300 states and 433 transitions. [2024-10-13 21:55:02,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2024-10-13 21:55:02,301 INFO L78 Accepts]: Start accepts. Automaton has has 197 states, 197 states have (on average 1.1065989847715736) internal successors, (218), 197 states have internal predecessors, (218), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 120 [2024-10-13 21:55:02,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 21:55:02,302 INFO L225 Difference]: With dead ends: 300 [2024-10-13 21:55:02,302 INFO L226 Difference]: Without dead ends: 248 [2024-10-13 21:55:02,304 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2024-10-13 21:55:02,305 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 21:55:02,305 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 352 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 21:55:02,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2024-10-13 21:55:02,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2024-10-13 21:55:02,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 241 states have (on average 1.070539419087137) internal successors, (258), 242 states have internal predecessors, (258), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-13 21:55:02,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 266 transitions. [2024-10-13 21:55:02,315 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 266 transitions. Word has length 120 [2024-10-13 21:55:02,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 21:55:02,315 INFO L471 AbstractCegarLoop]: Abstraction has 248 states and 266 transitions. [2024-10-13 21:55:02,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 197 states, 197 states have (on average 1.1065989847715736) internal successors, (218), 197 states have internal predecessors, (218), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-13 21:55:02,315 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 266 transitions. [2024-10-13 21:55:02,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2024-10-13 21:55:02,317 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 21:55:02,317 INFO L215 NwaCegarLoop]: trace histogram [194, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 21:55:02,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-13 21:55:02,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:55:02,518 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 21:55:02,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 21:55:02,518 INFO L85 PathProgramCache]: Analyzing trace with hash -546200890, now seen corresponding path program 3 times [2024-10-13 21:55:02,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 21:55:02,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799915660] [2024-10-13 21:55:02,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:55:02,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 21:55:02,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:55:19,049 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2024-10-13 21:55:19,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:55:19,059 INFO L134 CoverageAnalysis]: Checked inductivity of 18920 backedges. 2 proven. 18915 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 21:55:19,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 21:55:19,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799915660] [2024-10-13 21:55:19,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799915660] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 21:55:19,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555643569] [2024-10-13 21:55:19,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 21:55:19,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:55:19,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 21:55:19,062 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 21:55:19,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-13 21:55:19,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-13 21:55:19,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 21:55:19,310 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-13 21:55:19,314 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 21:55:19,514 INFO L134 CoverageAnalysis]: Checked inductivity of 18920 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18919 trivial. 0 not checked. [2024-10-13 21:55:19,515 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 21:55:19,740 INFO L134 CoverageAnalysis]: Checked inductivity of 18920 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 18917 trivial. 0 not checked. [2024-10-13 21:55:19,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555643569] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 21:55:19,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 21:55:19,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [197, 5, 5] total 203 [2024-10-13 21:55:19,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288171440] [2024-10-13 21:55:19,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 21:55:19,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2024-10-13 21:55:19,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 21:55:19,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2024-10-13 21:55:19,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19325, Invalid=21681, Unknown=0, NotChecked=0, Total=41006 [2024-10-13 21:55:19,750 INFO L87 Difference]: Start difference. First operand 248 states and 266 transitions. Second operand has 203 states, 203 states have (on average 1.1379310344827587) internal successors, (231), 203 states have internal predecessors, (231), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-13 21:55:20,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 21:55:20,610 INFO L93 Difference]: Finished difference Result 348 states and 412 transitions. [2024-10-13 21:55:20,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2024-10-13 21:55:20,611 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.1379310344827587) internal successors, (231), 203 states have internal predecessors, (231), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 218 [2024-10-13 21:55:20,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 21:55:20,613 INFO L225 Difference]: With dead ends: 348 [2024-10-13 21:55:20,613 INFO L226 Difference]: Without dead ends: 296 [2024-10-13 21:55:20,616 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=19374, Invalid=24098, Unknown=0, NotChecked=0, Total=43472 [2024-10-13 21:55:20,618 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 93 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 21:55:20,619 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 380 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 21:55:20,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2024-10-13 21:55:20,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 277. [2024-10-13 21:55:20,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 269 states have (on average 1.0892193308550187) internal successors, (293), 270 states have internal predecessors, (293), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-13 21:55:20,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 303 transitions. [2024-10-13 21:55:20,639 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 303 transitions. Word has length 218 [2024-10-13 21:55:20,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 21:55:20,639 INFO L471 AbstractCegarLoop]: Abstraction has 277 states and 303 transitions. [2024-10-13 21:55:20,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.1379310344827587) internal successors, (231), 203 states have internal predecessors, (231), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-13 21:55:20,640 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 303 transitions. [2024-10-13 21:55:20,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2024-10-13 21:55:20,642 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 21:55:20,642 INFO L215 NwaCegarLoop]: trace histogram [195, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 21:55:20,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-13 21:55:20,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-13 21:55:20,843 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 21:55:20,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 21:55:20,843 INFO L85 PathProgramCache]: Analyzing trace with hash -21559199, now seen corresponding path program 4 times [2024-10-13 21:55:20,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 21:55:20,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663888706] [2024-10-13 21:55:20,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:55:20,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 21:55:21,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:55:37,435 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2024-10-13 21:55:37,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:55:37,440 INFO L134 CoverageAnalysis]: Checked inductivity of 19136 backedges. 2 proven. 19110 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-13 21:55:37,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 21:55:37,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663888706] [2024-10-13 21:55:37,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663888706] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 21:55:37,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277282173] [2024-10-13 21:55:37,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 21:55:37,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:55:37,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 21:55:37,442 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 21:55:37,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-13 21:55:37,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 21:55:37,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 21:55:37,839 INFO L255 TraceCheckSpWp]: Trace formula consists of 1877 conjuncts, 197 conjuncts are in the unsatisfiable core [2024-10-13 21:55:37,844 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 21:55:38,045 INFO L134 CoverageAnalysis]: Checked inductivity of 19136 backedges. 0 proven. 19110 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-10-13 21:55:38,046 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 21:56:11,267 INFO L134 CoverageAnalysis]: Checked inductivity of 19136 backedges. 2 proven. 19110 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-13 21:56:11,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277282173] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 21:56:11,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 21:56:11,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [198, 197, 198] total 395 [2024-10-13 21:56:11,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044921417] [2024-10-13 21:56:11,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 21:56:11,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 395 states [2024-10-13 21:56:11,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 21:56:11,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 395 interpolants. [2024-10-13 21:56:11,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77815, Invalid=77815, Unknown=0, NotChecked=0, Total=155630 [2024-10-13 21:56:11,286 INFO L87 Difference]: Start difference. First operand 277 states and 303 transitions. Second operand has 395 states, 395 states have (on average 1.0531645569620254) internal successors, (416), 395 states have internal predecessors, (416), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-13 21:56:12,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 21:56:12,637 INFO L93 Difference]: Finished difference Result 554 states and 802 transitions. [2024-10-13 21:56:12,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 394 states. [2024-10-13 21:56:12,637 INFO L78 Accepts]: Start accepts. Automaton has has 395 states, 395 states have (on average 1.0531645569620254) internal successors, (416), 395 states have internal predecessors, (416), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 228 [2024-10-13 21:56:12,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 21:56:12,639 INFO L225 Difference]: With dead ends: 554 [2024-10-13 21:56:12,640 INFO L226 Difference]: Without dead ends: 474 [2024-10-13 21:56:12,646 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 393 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 44.2s TimeCoverageRelationStatistics Valid=77815, Invalid=77815, Unknown=0, NotChecked=0, Total=155630 [2024-10-13 21:56:12,646 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-13 21:56:12,647 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 317 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-13 21:56:12,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2024-10-13 21:56:12,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 474. [2024-10-13 21:56:12,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 466 states have (on average 1.0515021459227467) internal successors, (490), 467 states have internal predecessors, (490), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-13 21:56:12,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 500 transitions. [2024-10-13 21:56:12,662 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 500 transitions. Word has length 228 [2024-10-13 21:56:12,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 21:56:12,663 INFO L471 AbstractCegarLoop]: Abstraction has 474 states and 500 transitions. [2024-10-13 21:56:12,663 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 395 states, 395 states have (on average 1.0531645569620254) internal successors, (416), 395 states have internal predecessors, (416), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-13 21:56:12,663 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 500 transitions. [2024-10-13 21:56:12,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2024-10-13 21:56:12,666 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 21:56:12,666 INFO L215 NwaCegarLoop]: trace histogram [392, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 21:56:12,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-13 21:56:12,870 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-13 21:56:12,871 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 21:56:12,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 21:56:12,871 INFO L85 PathProgramCache]: Analyzing trace with hash -482330982, now seen corresponding path program 5 times [2024-10-13 21:56:12,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 21:56:12,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786070172] [2024-10-13 21:56:12,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:56:12,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 21:56:13,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat