./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep10-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep10-2.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 246513a49efb434b9c960a67f526057a6e0f9037478ee43a300fa4a565ea6e54 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-10 21:58:55,532 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-10 21:58:55,614 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-10 21:58:55,620 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-10 21:58:55,622 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-10 21:58:55,654 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-10 21:58:55,654 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-10 21:58:55,655 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-10 21:58:55,656 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-10 21:58:55,657 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-10 21:58:55,658 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-10 21:58:55,658 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-10 21:58:55,659 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-10 21:58:55,662 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-10 21:58:55,663 INFO L153 SettingsManager]: * Use SBE=true [2024-10-10 21:58:55,663 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-10 21:58:55,663 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-10 21:58:55,664 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-10 21:58:55,664 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-10 21:58:55,664 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-10 21:58:55,665 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-10 21:58:55,665 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-10 21:58:55,665 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-10 21:58:55,666 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-10 21:58:55,666 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-10 21:58:55,666 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-10 21:58:55,666 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-10 21:58:55,667 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-10 21:58:55,667 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-10 21:58:55,667 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-10 21:58:55,668 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-10 21:58:55,668 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-10 21:58:55,668 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 21:58:55,669 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-10 21:58:55,669 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-10 21:58:55,669 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-10 21:58:55,670 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-10 21:58:55,670 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-10 21:58:55,670 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-10 21:58:55,671 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-10 21:58:55,671 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-10 21:58:55,671 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-10 21:58:55,672 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 246513a49efb434b9c960a67f526057a6e0f9037478ee43a300fa4a565ea6e54 [2024-10-10 21:58:55,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-10 21:58:55,994 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-10 21:58:55,998 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-10 21:58:56,000 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-10 21:58:56,000 INFO L274 PluginConnector]: CDTParser initialized [2024-10-10 21:58:56,002 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep10-2.i [2024-10-10 21:58:57,475 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-10 21:58:57,682 INFO L384 CDTParser]: Found 1 translation units. [2024-10-10 21:58:57,683 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep10-2.i [2024-10-10 21:58:57,690 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/8b3671cb8/df24c31aa0694261ae7c7f0dc5bfd595/FLAGf16ad94ff [2024-10-10 21:58:57,703 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/8b3671cb8/df24c31aa0694261ae7c7f0dc5bfd595 [2024-10-10 21:58:57,705 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-10 21:58:57,707 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-10 21:58:57,709 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-10 21:58:57,710 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-10 21:58:57,714 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-10 21:58:57,715 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 09:58:57" (1/1) ... [2024-10-10 21:58:57,716 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b1bfde6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:58:57, skipping insertion in model container [2024-10-10 21:58:57,716 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 09:58:57" (1/1) ... [2024-10-10 21:58:57,736 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-10 21:58:57,936 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/reducercommutativity/sep10-2.i[1293,1306] [2024-10-10 21:58:57,942 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 21:58:57,952 INFO L200 MainTranslator]: Completed pre-run [2024-10-10 21:58:57,977 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/reducercommutativity/sep10-2.i[1293,1306] [2024-10-10 21:58:57,982 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 21:58:58,007 INFO L204 MainTranslator]: Completed translation [2024-10-10 21:58:58,008 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:58:58 WrapperNode [2024-10-10 21:58:58,008 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-10 21:58:58,014 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-10 21:58:58,015 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-10 21:58:58,015 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-10 21:58:58,022 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:58:58" (1/1) ... [2024-10-10 21:58:58,028 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:58:58" (1/1) ... [2024-10-10 21:58:58,054 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2024-10-10 21:58:58,055 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-10 21:58:58,055 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-10 21:58:58,055 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-10 21:58:58,056 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-10 21:58:58,066 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:58:58" (1/1) ... [2024-10-10 21:58:58,066 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:58:58" (1/1) ... [2024-10-10 21:58:58,068 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:58:58" (1/1) ... [2024-10-10 21:58:58,088 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 5 writes are split as follows [0, 5]. [2024-10-10 21:58:58,091 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:58:58" (1/1) ... [2024-10-10 21:58:58,091 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:58:58" (1/1) ... [2024-10-10 21:58:58,097 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:58:58" (1/1) ... [2024-10-10 21:58:58,100 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:58:58" (1/1) ... [2024-10-10 21:58:58,101 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:58:58" (1/1) ... [2024-10-10 21:58:58,102 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:58:58" (1/1) ... [2024-10-10 21:58:58,104 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-10 21:58:58,105 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-10 21:58:58,105 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-10 21:58:58,105 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-10 21:58:58,110 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:58:58" (1/1) ... [2024-10-10 21:58:58,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 21:58:58,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:58:58,146 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-10 21:58:58,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-10 21:58:58,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-10 21:58:58,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-10 21:58:58,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-10 21:58:58,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-10 21:58:58,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-10 21:58:58,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-10 21:58:58,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-10 21:58:58,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-10 21:58:58,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-10 21:58:58,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-10 21:58:58,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-10 21:58:58,194 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2024-10-10 21:58:58,194 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2024-10-10 21:58:58,289 INFO L238 CfgBuilder]: Building ICFG [2024-10-10 21:58:58,291 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-10 21:58:58,497 INFO L? ?]: Removed 16 outVars from TransFormulas that were not future-live. [2024-10-10 21:58:58,497 INFO L287 CfgBuilder]: Performing block encoding [2024-10-10 21:58:58,523 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-10 21:58:58,524 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-10 21:58:58,524 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 09:58:58 BoogieIcfgContainer [2024-10-10 21:58:58,524 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-10 21:58:58,526 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-10 21:58:58,527 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-10 21:58:58,530 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-10 21:58:58,530 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.10 09:58:57" (1/3) ... [2024-10-10 21:58:58,531 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20075204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 09:58:58, skipping insertion in model container [2024-10-10 21:58:58,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:58:58" (2/3) ... [2024-10-10 21:58:58,531 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20075204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 09:58:58, skipping insertion in model container [2024-10-10 21:58:58,532 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 09:58:58" (3/3) ... [2024-10-10 21:58:58,533 INFO L112 eAbstractionObserver]: Analyzing ICFG sep10-2.i [2024-10-10 21:58:58,551 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-10 21:58:58,552 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-10 21:58:58,601 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-10 21:58:58,607 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;@32a61bcb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-10 21:58:58,607 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-10 21:58:58,610 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 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) [2024-10-10 21:58:58,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-10 21:58:58,618 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:58:58,619 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:58:58,620 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:58:58,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:58:58,626 INFO L85 PathProgramCache]: Analyzing trace with hash -110337137, now seen corresponding path program 1 times [2024-10-10 21:58:58,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:58:58,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568778783] [2024-10-10 21:58:58,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:58:58,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:58:58,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:58:58,923 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-10 21:58:58,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:58:58,937 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-10 21:58:58,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:58:58,951 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-10 21:58:58,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:58:58,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-10 21:58:58,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:58:58,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568778783] [2024-10-10 21:58:58,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568778783] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 21:58:58,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 21:58:58,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-10 21:58:58,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166761181] [2024-10-10 21:58:58,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 21:58:58,977 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-10 21:58:58,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:58:59,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-10 21:58:59,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-10 21:58:59,004 INFO L87 Difference]: Start difference. First operand has 22 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 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 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-10 21:58:59,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:58:59,055 INFO L93 Difference]: Finished difference Result 43 states and 64 transitions. [2024-10-10 21:58:59,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-10 21:58:59,057 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2024-10-10 21:58:59,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:58:59,062 INFO L225 Difference]: With dead ends: 43 [2024-10-10 21:58:59,062 INFO L226 Difference]: Without dead ends: 21 [2024-10-10 21:58:59,064 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-10 21:58:59,067 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:58:59,068 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:58:59,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-10-10 21:58:59,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-10-10 21:58:59,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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) [2024-10-10 21:58:59,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2024-10-10 21:58:59,098 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 25 [2024-10-10 21:58:59,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:58:59,099 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2024-10-10 21:58:59,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-10 21:58:59,100 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2024-10-10 21:58:59,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-10 21:58:59,101 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:58:59,101 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:58:59,101 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-10 21:58:59,102 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:58:59,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:58:59,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1417820460, now seen corresponding path program 1 times [2024-10-10 21:58:59,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:58:59,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711442532] [2024-10-10 21:58:59,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:58:59,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:58:59,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:58:59,238 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-10 21:58:59,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:58:59,259 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-10 21:58:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:58:59,274 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-10 21:58:59,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:58:59,288 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 21:58:59,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:58:59,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711442532] [2024-10-10 21:58:59,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711442532] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:58:59,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358515800] [2024-10-10 21:58:59,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:58:59,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:58:59,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:58:59,292 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:58:59,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-10 21:58:59,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:58:59,398 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-10 21:58:59,405 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:58:59,431 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-10 21:58:59,435 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-10 21:58:59,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358515800] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 21:58:59,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-10 21:58:59,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2024-10-10 21:58:59,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906579342] [2024-10-10 21:58:59,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 21:58:59,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-10 21:58:59,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:58:59,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-10 21:58:59,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-10 21:58:59,441 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 21:58:59,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:58:59,468 INFO L93 Difference]: Finished difference Result 40 states and 53 transitions. [2024-10-10 21:58:59,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-10 21:58:59,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2024-10-10 21:58:59,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:58:59,470 INFO L225 Difference]: With dead ends: 40 [2024-10-10 21:58:59,470 INFO L226 Difference]: Without dead ends: 24 [2024-10-10 21:58:59,470 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-10 21:58:59,472 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 36 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 [2024-10-10 21:58:59,472 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 36 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:58:59,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-10-10 21:58:59,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2024-10-10 21:58:59,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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) [2024-10-10 21:58:59,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2024-10-10 21:58:59,483 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 26 [2024-10-10 21:58:59,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:58:59,484 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2024-10-10 21:58:59,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 21:58:59,485 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2024-10-10 21:58:59,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-10 21:58:59,486 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:58:59,486 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:58:59,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-10 21:58:59,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:58:59,691 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:58:59,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:58:59,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1584330763, now seen corresponding path program 1 times [2024-10-10 21:58:59,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:58:59,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007244456] [2024-10-10 21:58:59,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:58:59,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:58:59,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:58:59,860 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-10 21:58:59,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:58:59,878 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-10 21:58:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:58:59,897 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-10 21:58:59,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:58:59,945 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-10 21:58:59,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:58:59,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007244456] [2024-10-10 21:58:59,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007244456] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:58:59,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756388276] [2024-10-10 21:58:59,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:58:59,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:58:59,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:58:59,952 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:58:59,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-10 21:59:00,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:00,052 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-10 21:59:00,054 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:59:00,076 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-10 21:59:00,078 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-10 21:59:00,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756388276] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 21:59:00,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-10 21:59:00,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-10-10 21:59:00,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130939418] [2024-10-10 21:59:00,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 21:59:00,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-10 21:59:00,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:59:00,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-10 21:59:00,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-10 21:59:00,082 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 21:59:00,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:59:00,103 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2024-10-10 21:59:00,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-10 21:59:00,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2024-10-10 21:59:00,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:59:00,105 INFO L225 Difference]: With dead ends: 36 [2024-10-10 21:59:00,105 INFO L226 Difference]: Without dead ends: 23 [2024-10-10 21:59:00,106 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-10 21:59:00,109 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:59:00,110 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:59:00,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-10 21:59:00,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-10-10 21:59:00,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 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) [2024-10-10 21:59:00,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2024-10-10 21:59:00,119 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 35 [2024-10-10 21:59:00,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:59:00,121 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2024-10-10 21:59:00,121 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 21:59:00,122 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2024-10-10 21:59:00,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-10 21:59:00,123 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:59:00,123 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:59:00,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-10 21:59:00,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:59:00,328 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:59:00,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:59:00,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1105168803, now seen corresponding path program 1 times [2024-10-10 21:59:00,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:59:00,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432100174] [2024-10-10 21:59:00,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:59:00,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:59:00,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:00,419 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-10 21:59:00,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:00,430 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-10 21:59:00,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:00,449 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-10 21:59:00,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:00,497 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-10 21:59:00,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:59:00,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432100174] [2024-10-10 21:59:00,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432100174] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:59:00,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91359673] [2024-10-10 21:59:00,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:59:00,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:59:00,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:59:00,504 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:59:00,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-10 21:59:00,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:00,593 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-10 21:59:00,595 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:59:00,631 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-10 21:59:00,635 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:59:00,694 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-10 21:59:00,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91359673] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:59:00,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:59:00,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 9 [2024-10-10 21:59:00,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425133326] [2024-10-10 21:59:00,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:59:00,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-10 21:59:00,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:59:00,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-10 21:59:00,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-10-10 21:59:00,700 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-10 21:59:00,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:59:00,757 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2024-10-10 21:59:00,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-10 21:59:00,760 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 36 [2024-10-10 21:59:00,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:59:00,760 INFO L225 Difference]: With dead ends: 51 [2024-10-10 21:59:00,761 INFO L226 Difference]: Without dead ends: 31 [2024-10-10 21:59:00,761 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-10-10 21:59:00,762 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 5 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:59:00,762 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 89 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:59:00,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-10-10 21:59:00,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2024-10-10 21:59:00,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 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) [2024-10-10 21:59:00,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2024-10-10 21:59:00,772 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 36 [2024-10-10 21:59:00,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:59:00,772 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2024-10-10 21:59:00,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-10 21:59:00,773 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2024-10-10 21:59:00,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-10 21:59:00,774 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:59:00,774 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:59:00,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-10 21:59:00,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:59:00,976 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:59:00,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:59:00,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1956133820, now seen corresponding path program 2 times [2024-10-10 21:59:00,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:59:00,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645209279] [2024-10-10 21:59:00,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:59:00,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:59:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:01,103 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-10 21:59:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:01,112 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-10 21:59:01,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:01,121 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-10-10 21:59:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:01,131 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2024-10-10 21:59:01,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:59:01,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645209279] [2024-10-10 21:59:01,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645209279] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:59:01,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486464626] [2024-10-10 21:59:01,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 21:59:01,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:59:01,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:59:01,134 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:59:01,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-10 21:59:01,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 21:59:01,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 21:59:01,225 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-10 21:59:01,227 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:59:01,286 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-10-10 21:59:01,286 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:59:01,383 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-10-10 21:59:01,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486464626] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:59:01,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:59:01,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2024-10-10 21:59:01,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253015210] [2024-10-10 21:59:01,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:59:01,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-10 21:59:01,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:59:01,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-10 21:59:01,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-10 21:59:01,385 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-10 21:59:01,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:59:01,433 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2024-10-10 21:59:01,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-10 21:59:01,435 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2024-10-10 21:59:01,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:59:01,435 INFO L225 Difference]: With dead ends: 59 [2024-10-10 21:59:01,435 INFO L226 Difference]: Without dead ends: 36 [2024-10-10 21:59:01,436 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-10 21:59:01,437 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:59:01,437 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 153 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:59:01,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-10-10 21:59:01,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-10-10 21:59:01,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 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) [2024-10-10 21:59:01,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2024-10-10 21:59:01,445 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 48 [2024-10-10 21:59:01,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:59:01,445 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2024-10-10 21:59:01,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-10 21:59:01,446 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2024-10-10 21:59:01,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-10 21:59:01,450 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:59:01,450 INFO L215 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:59:01,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-10 21:59:01,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:59:01,655 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:59:01,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:59:01,655 INFO L85 PathProgramCache]: Analyzing trace with hash -538144458, now seen corresponding path program 3 times [2024-10-10 21:59:01,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:59:01,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896565675] [2024-10-10 21:59:01,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:59:01,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:59:01,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:01,789 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-10 21:59:01,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:01,822 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-10 21:59:01,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:01,830 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-10 21:59:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:01,838 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-10-10 21:59:01,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:59:01,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896565675] [2024-10-10 21:59:01,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896565675] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:59:01,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256331216] [2024-10-10 21:59:01,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 21:59:01,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:59:01,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:59:01,841 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:59:01,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-10 21:59:01,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-10 21:59:01,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 21:59:01,939 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-10 21:59:01,941 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:59:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 40 proven. 3 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-10-10 21:59:01,975 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:59:02,018 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-10-10 21:59:02,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256331216] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:59:02,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:59:02,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-10-10 21:59:02,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183674501] [2024-10-10 21:59:02,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:59:02,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-10 21:59:02,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:59:02,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-10 21:59:02,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-10-10 21:59:02,021 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 21:59:02,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:59:02,078 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2024-10-10 21:59:02,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-10 21:59:02,079 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2024-10-10 21:59:02,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:59:02,080 INFO L225 Difference]: With dead ends: 67 [2024-10-10 21:59:02,080 INFO L226 Difference]: Without dead ends: 45 [2024-10-10 21:59:02,080 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-10-10 21:59:02,081 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:59:02,081 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 103 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:59:02,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-10-10 21:59:02,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2024-10-10 21:59:02,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 21:59:02,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2024-10-10 21:59:02,092 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 55 [2024-10-10 21:59:02,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:59:02,093 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2024-10-10 21:59:02,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 21:59:02,094 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2024-10-10 21:59:02,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-10 21:59:02,095 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:59:02,095 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:59:02,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-10 21:59:02,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:59:02,296 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:59:02,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:59:02,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1299676501, now seen corresponding path program 4 times [2024-10-10 21:59:02,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:59:02,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725991593] [2024-10-10 21:59:02,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:59:02,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:59:02,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:02,460 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-10 21:59:02,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:02,517 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-10 21:59:02,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:02,529 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-10 21:59:02,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:02,544 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2024-10-10 21:59:02,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:59:02,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725991593] [2024-10-10 21:59:02,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725991593] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:59:02,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780738652] [2024-10-10 21:59:02,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-10 21:59:02,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:59:02,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:59:02,546 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:59:02,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-10 21:59:02,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-10 21:59:02,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 21:59:02,650 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-10 21:59:02,652 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:59:02,677 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2024-10-10 21:59:02,677 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:59:02,745 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2024-10-10 21:59:02,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780738652] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:59:02,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:59:02,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-10-10 21:59:02,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466754491] [2024-10-10 21:59:02,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:59:02,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-10 21:59:02,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:59:02,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-10 21:59:02,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2024-10-10 21:59:02,746 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-10 21:59:02,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:59:02,799 INFO L93 Difference]: Finished difference Result 87 states and 112 transitions. [2024-10-10 21:59:02,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-10 21:59:02,800 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2024-10-10 21:59:02,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:59:02,801 INFO L225 Difference]: With dead ends: 87 [2024-10-10 21:59:02,801 INFO L226 Difference]: Without dead ends: 58 [2024-10-10 21:59:02,801 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2024-10-10 21:59:02,802 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 23 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:59:02,804 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 48 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:59:02,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-10 21:59:02,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-10-10 21:59:02,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 53 states have internal predecessors, (64), 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) [2024-10-10 21:59:02,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2024-10-10 21:59:02,813 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 68 [2024-10-10 21:59:02,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:59:02,813 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2024-10-10 21:59:02,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-10 21:59:02,813 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2024-10-10 21:59:02,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-10-10 21:59:02,815 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:59:02,815 INFO L215 NwaCegarLoop]: trace histogram [24, 24, 24, 10, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:59:02,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-10 21:59:03,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-10 21:59:03,016 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:59:03,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:59:03,016 INFO L85 PathProgramCache]: Analyzing trace with hash -604491626, now seen corresponding path program 5 times [2024-10-10 21:59:03,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:59:03,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908991125] [2024-10-10 21:59:03,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:59:03,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:59:03,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:03,373 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-10 21:59:03,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:03,514 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-10-10 21:59:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:03,533 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-10-10 21:59:03,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:03,552 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 0 proven. 514 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked. [2024-10-10 21:59:03,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:59:03,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908991125] [2024-10-10 21:59:03,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908991125] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:59:03,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25983505] [2024-10-10 21:59:03,553 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-10 21:59:03,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:59:03,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:59:03,555 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:59:03,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-10 21:59:04,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-10-10 21:59:04,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 21:59:04,100 INFO L255 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-10 21:59:04,103 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:59:04,147 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 420 proven. 92 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2024-10-10 21:59:04,147 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:59:04,267 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 0 proven. 514 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked. [2024-10-10 21:59:04,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25983505] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:59:04,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:59:04,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 12 [2024-10-10 21:59:04,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358088393] [2024-10-10 21:59:04,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:59:04,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-10 21:59:04,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:59:04,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-10 21:59:04,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2024-10-10 21:59:04,271 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-10 21:59:04,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:59:04,345 INFO L93 Difference]: Finished difference Result 108 states and 137 transitions. [2024-10-10 21:59:04,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-10 21:59:04,345 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2024-10-10 21:59:04,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:59:04,348 INFO L225 Difference]: With dead ends: 108 [2024-10-10 21:59:04,348 INFO L226 Difference]: Without dead ends: 64 [2024-10-10 21:59:04,349 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 223 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2024-10-10 21:59:04,350 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 27 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:59:04,350 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 67 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:59:04,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-10-10 21:59:04,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2024-10-10 21:59:04,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 59 states have internal predecessors, (72), 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) [2024-10-10 21:59:04,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2024-10-10 21:59:04,360 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 113 [2024-10-10 21:59:04,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:59:04,360 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2024-10-10 21:59:04,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-10 21:59:04,360 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2024-10-10 21:59:04,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-10-10 21:59:04,362 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:59:04,362 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 30, 10, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:59:04,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-10 21:59:04,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:59:04,567 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:59:04,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:59:04,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1826880202, now seen corresponding path program 6 times [2024-10-10 21:59:04,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:59:04,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567388919] [2024-10-10 21:59:04,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:59:04,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:59:04,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:04,935 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-10 21:59:04,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:04,953 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-10-10 21:59:04,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:04,979 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-10-10 21:59:04,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:05,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1462 trivial. 0 not checked. [2024-10-10 21:59:05,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:59:05,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567388919] [2024-10-10 21:59:05,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567388919] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:59:05,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144516209] [2024-10-10 21:59:05,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-10 21:59:05,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:59:05,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:59:05,004 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:59:05,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-10 21:59:05,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-10-10 21:59:05,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 21:59:05,254 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-10 21:59:05,257 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:59:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 648 proven. 21 refuted. 0 times theorem prover too weak. 814 trivial. 0 not checked. [2024-10-10 21:59:05,291 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:59:05,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1462 trivial. 0 not checked. [2024-10-10 21:59:05,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144516209] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:59:05,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:59:05,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2024-10-10 21:59:05,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279078074] [2024-10-10 21:59:05,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:59:05,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-10 21:59:05,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:59:05,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-10 21:59:05,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2024-10-10 21:59:05,379 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-10 21:59:05,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:59:05,413 INFO L93 Difference]: Finished difference Result 107 states and 134 transitions. [2024-10-10 21:59:05,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-10 21:59:05,415 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 131 [2024-10-10 21:59:05,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:59:05,416 INFO L225 Difference]: With dead ends: 107 [2024-10-10 21:59:05,416 INFO L226 Difference]: Without dead ends: 67 [2024-10-10 21:59:05,416 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 260 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2024-10-10 21:59:05,417 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 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 [2024-10-10 21:59:05,417 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:59:05,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-10-10 21:59:05,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-10-10 21:59:05,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 62 states have internal predecessors, (75), 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) [2024-10-10 21:59:05,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2024-10-10 21:59:05,430 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 131 [2024-10-10 21:59:05,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:59:05,431 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2024-10-10 21:59:05,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-10 21:59:05,431 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2024-10-10 21:59:05,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-10-10 21:59:05,433 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:59:05,433 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 30, 10, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:59:05,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-10 21:59:05,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:59:05,634 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:59:05,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:59:05,634 INFO L85 PathProgramCache]: Analyzing trace with hash 692416252, now seen corresponding path program 7 times [2024-10-10 21:59:05,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:59:05,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73331490] [2024-10-10 21:59:05,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:59:05,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:59:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:08,651 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-10 21:59:08,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:09,080 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-10-10 21:59:09,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:09,386 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-10-10 21:59:09,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:09,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2024-10-10 21:59:09,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:59:09,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73331490] [2024-10-10 21:59:09,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73331490] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:59:09,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302885954] [2024-10-10 21:59:09,774 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-10 21:59:09,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:59:09,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:59:09,776 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:59:09,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-10 21:59:09,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:09,999 INFO L255 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 167 conjuncts are in the unsatisfiable core [2024-10-10 21:59:10,007 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:59:10,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 0 proven. 1360 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2024-10-10 21:59:10,555 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:59:11,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 0 proven. 1305 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2024-10-10 21:59:11,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302885954] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:59:11,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:59:11,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 30, 20] total 44 [2024-10-10 21:59:11,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150009359] [2024-10-10 21:59:11,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:59:11,670 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-10-10 21:59:11,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:59:11,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-10-10 21:59:11,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1786, Unknown=0, NotChecked=0, Total=1892 [2024-10-10 21:59:11,672 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 44 states, 42 states have (on average 2.261904761904762) internal successors, (95), 40 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-10 21:59:12,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:59:12,534 INFO L93 Difference]: Finished difference Result 230 states and 299 transitions. [2024-10-10 21:59:12,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-10 21:59:12,535 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 2.261904761904762) internal successors, (95), 40 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 134 [2024-10-10 21:59:12,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:59:12,541 INFO L225 Difference]: With dead ends: 230 [2024-10-10 21:59:12,541 INFO L226 Difference]: Without dead ends: 226 [2024-10-10 21:59:12,542 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=106, Invalid=1786, Unknown=0, NotChecked=0, Total=1892 [2024-10-10 21:59:12,543 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 28 mSDsluCounter, 1425 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 1564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-10 21:59:12,543 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 1477 Invalid, 1564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1546 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-10 21:59:12,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2024-10-10 21:59:12,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 199. [2024-10-10 21:59:12,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 191 states have (on average 1.3141361256544504) internal successors, (251), 192 states have internal predecessors, (251), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2024-10-10 21:59:12,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 265 transitions. [2024-10-10 21:59:12,581 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 265 transitions. Word has length 134 [2024-10-10 21:59:12,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:59:12,581 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 265 transitions. [2024-10-10 21:59:12,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 2.261904761904762) internal successors, (95), 40 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-10 21:59:12,582 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 265 transitions. [2024-10-10 21:59:12,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-10-10 21:59:12,587 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:59:12,587 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 29, 10, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:59:12,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-10 21:59:12,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:59:12,788 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:59:12,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:59:12,789 INFO L85 PathProgramCache]: Analyzing trace with hash -116930374, now seen corresponding path program 1 times [2024-10-10 21:59:12,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:59:12,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061787042] [2024-10-10 21:59:12,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:59:12,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:59:13,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:15,823 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-10 21:59:15,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:16,377 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-10-10 21:59:16,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:16,408 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-10-10 21:59:16,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 324 proven. 917 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2024-10-10 21:59:17,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:59:17,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061787042] [2024-10-10 21:59:17,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061787042] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:59:17,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890390976] [2024-10-10 21:59:17,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:59:17,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:59:17,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:59:17,064 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:59:17,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-10 21:59:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:17,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-10-10 21:59:17,292 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:59:17,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 15 [2024-10-10 21:59:17,753 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 23 treesize of output 11 [2024-10-10 21:59:17,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-10 21:59:18,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 6 proven. 1166 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2024-10-10 21:59:18,915 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:59:20,425 INFO L349 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2024-10-10 21:59:20,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2024-10-10 21:59:20,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 350 proven. 809 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2024-10-10 21:59:20,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890390976] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:59:20,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:59:20,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 26, 22] total 69 [2024-10-10 21:59:20,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322069075] [2024-10-10 21:59:20,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:59:20,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-10-10 21:59:20,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:59:20,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-10-10 21:59:20,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=4453, Unknown=0, NotChecked=0, Total=4692 [2024-10-10 21:59:20,565 INFO L87 Difference]: Start difference. First operand 199 states and 265 transitions. Second operand has 69 states, 67 states have (on average 2.5074626865671643) internal successors, (168), 66 states have internal predecessors, (168), 6 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2024-10-10 21:59:27,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:59:27,403 INFO L93 Difference]: Finished difference Result 1244 states and 1770 transitions. [2024-10-10 21:59:27,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2024-10-10 21:59:27,403 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 67 states have (on average 2.5074626865671643) internal successors, (168), 66 states have internal predecessors, (168), 6 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) Word has length 134 [2024-10-10 21:59:27,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:59:27,411 INFO L225 Difference]: With dead ends: 1244 [2024-10-10 21:59:27,412 INFO L226 Difference]: Without dead ends: 1149 [2024-10-10 21:59:27,418 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 273 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4371 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1036, Invalid=16520, Unknown=0, NotChecked=0, Total=17556 [2024-10-10 21:59:27,419 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 169 mSDsluCounter, 2389 mSDsCounter, 0 mSdLazyCounter, 5083 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 2461 SdHoareTripleChecker+Invalid, 5090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 5083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-10-10 21:59:27,419 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 2461 Invalid, 5090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 5083 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-10-10 21:59:27,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2024-10-10 21:59:27,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 653. [2024-10-10 21:59:27,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 635 states have (on average 1.3496062992125983) internal successors, (857), 640 states have internal predecessors, (857), 9 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2024-10-10 21:59:27,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 891 transitions. [2024-10-10 21:59:27,505 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 891 transitions. Word has length 134 [2024-10-10 21:59:27,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:59:27,506 INFO L471 AbstractCegarLoop]: Abstraction has 653 states and 891 transitions. [2024-10-10 21:59:27,506 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 67 states have (on average 2.5074626865671643) internal successors, (168), 66 states have internal predecessors, (168), 6 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2024-10-10 21:59:27,506 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 891 transitions. [2024-10-10 21:59:27,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-10-10 21:59:27,511 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:59:27,511 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 29, 10, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:59:27,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-10 21:59:27,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-10 21:59:27,716 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:59:27,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:59:27,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1393480830, now seen corresponding path program 2 times [2024-10-10 21:59:27,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:59:27,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238423399] [2024-10-10 21:59:27,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:59:27,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:59:28,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:31,757 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-10 21:59:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:32,385 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-10-10 21:59:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:32,410 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-10-10 21:59:32,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:32,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 323 proven. 1012 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-10-10 21:59:32,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:59:32,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238423399] [2024-10-10 21:59:32,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238423399] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:59:32,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621226808] [2024-10-10 21:59:32,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 21:59:32,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:59:32,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:59:32,996 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:59:32,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-10 21:59:33,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 21:59:33,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 21:59:33,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 122 conjuncts are in the unsatisfiable core [2024-10-10 21:59:33,232 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:59:33,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-10 21:59:33,579 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 21:59:33,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2024-10-10 21:59:33,656 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 21:59:33,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2024-10-10 21:59:33,743 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 21:59:33,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2024-10-10 21:59:33,820 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 21:59:33,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2024-10-10 21:59:33,900 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 21:59:33,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2024-10-10 21:59:33,981 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 21:59:33,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2024-10-10 21:59:34,062 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 21:59:34,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2024-10-10 21:59:34,142 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 21:59:34,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2024-10-10 21:59:34,220 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 21:59:34,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 32 [2024-10-10 21:59:34,308 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 21:59:34,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 18 [2024-10-10 21:59:35,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 673 proven. 685 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2024-10-10 21:59:35,499 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:59:38,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 708 proven. 594 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2024-10-10 21:59:38,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621226808] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:59:38,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:59:38,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 48, 36] total 98 [2024-10-10 21:59:38,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123946959] [2024-10-10 21:59:38,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:59:38,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2024-10-10 21:59:38,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:59:38,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2024-10-10 21:59:38,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=9043, Unknown=0, NotChecked=0, Total=9506 [2024-10-10 21:59:38,301 INFO L87 Difference]: Start difference. First operand 653 states and 891 transitions. Second operand has 98 states, 98 states have (on average 2.122448979591837) internal successors, (208), 96 states have internal predecessors, (208), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2024-10-10 21:59:43,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:59:43,760 INFO L93 Difference]: Finished difference Result 2957 states and 4217 transitions. [2024-10-10 21:59:43,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2024-10-10 21:59:43,761 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.122448979591837) internal successors, (208), 96 states have internal predecessors, (208), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 134 [2024-10-10 21:59:43,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:59:43,775 INFO L225 Difference]: With dead ends: 2957 [2024-10-10 21:59:43,775 INFO L226 Difference]: Without dead ends: 2172 [2024-10-10 21:59:43,782 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 239 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4442 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1183, Invalid=16109, Unknown=0, NotChecked=0, Total=17292 [2024-10-10 21:59:43,783 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 178 mSDsluCounter, 2608 mSDsCounter, 0 mSdLazyCounter, 6054 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 2679 SdHoareTripleChecker+Invalid, 6087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 6054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-10-10 21:59:43,783 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 2679 Invalid, 6087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 6054 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2024-10-10 21:59:43,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2024-10-10 21:59:43,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 1473. [2024-10-10 21:59:43,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1437 states have (on average 1.3514265831593597) internal successors, (1942), 1448 states have internal predecessors, (1942), 17 states have call successors, (17), 7 states have call predecessors, (17), 18 states have return successors, (65), 17 states have call predecessors, (65), 17 states have call successors, (65) [2024-10-10 21:59:43,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 2024 transitions. [2024-10-10 21:59:43,984 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 2024 transitions. Word has length 134 [2024-10-10 21:59:43,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:59:43,984 INFO L471 AbstractCegarLoop]: Abstraction has 1473 states and 2024 transitions. [2024-10-10 21:59:43,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.122448979591837) internal successors, (208), 96 states have internal predecessors, (208), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2024-10-10 21:59:43,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 2024 transitions. [2024-10-10 21:59:43,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-10-10 21:59:43,993 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:59:43,993 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 29, 10, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:59:44,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-10 21:59:44,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-10 21:59:44,194 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:59:44,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:59:44,195 INFO L85 PathProgramCache]: Analyzing trace with hash -318700998, now seen corresponding path program 3 times [2024-10-10 21:59:44,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:59:44,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306455294] [2024-10-10 21:59:44,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:59:44,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:59:44,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:48,228 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-10 21:59:48,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:48,844 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-10-10 21:59:48,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:48,869 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-10-10 21:59:48,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:59:49,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 323 proven. 1014 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2024-10-10 21:59:49,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:59:49,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306455294] [2024-10-10 21:59:49,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306455294] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:59:49,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020377200] [2024-10-10 21:59:49,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 21:59:49,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:59:49,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:59:49,362 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:59:49,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-10 21:59:50,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2024-10-10 21:59:50,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 21:59:50,058 INFO L255 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 127 conjuncts are in the unsatisfiable core [2024-10-10 21:59:50,063 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:59:50,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-10 21:59:50,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-10 21:59:50,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2024-10-10 21:59:50,391 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 21:59:50,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2024-10-10 21:59:50,451 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 21:59:50,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2024-10-10 21:59:50,527 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 21:59:50,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2024-10-10 21:59:50,585 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 21:59:50,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2024-10-10 21:59:50,642 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 21:59:50,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2024-10-10 21:59:50,702 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 21:59:50,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2024-10-10 21:59:50,760 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 21:59:50,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2024-10-10 21:59:50,821 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 21:59:50,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 32 [2024-10-10 21:59:50,881 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 21:59:50,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 32 [2024-10-10 21:59:51,005 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 21:59:51,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 25 [2024-10-10 21:59:51,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 589 proven. 728 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-10-10 21:59:51,817 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:59:53,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 689 proven. 543 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2024-10-10 21:59:53,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020377200] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:59:53,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:59:53,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 47, 33] total 96 [2024-10-10 21:59:53,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965180127] [2024-10-10 21:59:53,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:59:53,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2024-10-10 21:59:53,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:59:53,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2024-10-10 21:59:53,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=608, Invalid=8512, Unknown=0, NotChecked=0, Total=9120 [2024-10-10 21:59:53,738 INFO L87 Difference]: Start difference. First operand 1473 states and 2024 transitions. Second operand has 96 states, 96 states have (on average 1.875) internal successors, (180), 94 states have internal predecessors, (180), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9)