./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/half_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 551b0097 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-invgen/half_2.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/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 0b362a98d328467ff4a069dbed2be3429090ca070e60d49c76297e4bb94402b7 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 02:57:45,777 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 02:57:45,812 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-09 02:57:45,816 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 02:57:45,816 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 02:57:45,843 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 02:57:45,843 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 02:57:45,844 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 02:57:45,844 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 02:57:45,844 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 02:57:45,845 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 02:57:45,845 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 02:57:45,845 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 02:57:45,845 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 02:57:45,846 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 02:57:45,846 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 02:57:45,846 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 02:57:45,846 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 02:57:45,846 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 02:57:45,846 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 02:57:45,846 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 02:57:45,846 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 02:57:45,846 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 02:57:45,846 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 02:57:45,846 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 02:57:45,846 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 02:57:45,846 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 02:57:45,846 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 02:57:45,846 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 02:57:45,846 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 02:57:45,846 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 02:57:45,846 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 02:57:45,847 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 02:57:45,847 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 02:57:45,847 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 02:57:45,847 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 02:57:45,847 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 02:57:45,847 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 02:57:45,847 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 02:57:45,848 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 02:57:45,848 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 02:57:45,848 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 02:57:45,848 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 02:57:45,848 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 02:57:45,848 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 02:57:45,848 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 02:57:45,848 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 02:57:45,848 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 02:57:45,848 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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-jdk21/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 -> 0b362a98d328467ff4a069dbed2be3429090ca070e60d49c76297e4bb94402b7 [2025-01-09 02:57:46,039 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 02:57:46,044 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 02:57:46,046 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 02:57:46,046 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 02:57:46,047 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 02:57:46,047 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/half_2.i [2025-01-09 02:57:47,108 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/0d9fe61f5/a6f731b078344a52abe6525aa3fd0a2a/FLAG0fd536853 [2025-01-09 02:57:47,284 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 02:57:47,284 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/loop-invgen/half_2.i [2025-01-09 02:57:47,310 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/0d9fe61f5/a6f731b078344a52abe6525aa3fd0a2a/FLAG0fd536853 [2025-01-09 02:57:47,666 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/0d9fe61f5/a6f731b078344a52abe6525aa3fd0a2a [2025-01-09 02:57:47,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 02:57:47,669 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 02:57:47,670 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 02:57:47,670 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 02:57:47,680 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 02:57:47,684 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 02:57:47" (1/1) ... [2025-01-09 02:57:47,684 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ffbba88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:57:47, skipping insertion in model container [2025-01-09 02:57:47,684 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 02:57:47" (1/1) ... [2025-01-09 02:57:47,701 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 02:57:47,829 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/loop-invgen/half_2.i[893,906] [2025-01-09 02:57:47,842 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 02:57:47,849 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 02:57:47,859 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/loop-invgen/half_2.i[893,906] [2025-01-09 02:57:47,862 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 02:57:47,873 INFO L204 MainTranslator]: Completed translation [2025-01-09 02:57:47,874 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:57:47 WrapperNode [2025-01-09 02:57:47,875 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 02:57:47,876 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 02:57:47,876 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 02:57:47,876 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 02:57:47,880 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:57:47" (1/1) ... [2025-01-09 02:57:47,886 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:57:47" (1/1) ... [2025-01-09 02:57:47,895 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 42 [2025-01-09 02:57:47,896 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 02:57:47,897 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 02:57:47,897 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 02:57:47,897 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 02:57:47,903 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:57:47" (1/1) ... [2025-01-09 02:57:47,903 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:57:47" (1/1) ... [2025-01-09 02:57:47,903 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:57:47" (1/1) ... [2025-01-09 02:57:47,911 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-01-09 02:57:47,912 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:57:47" (1/1) ... [2025-01-09 02:57:47,912 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:57:47" (1/1) ... [2025-01-09 02:57:47,915 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:57:47" (1/1) ... [2025-01-09 02:57:47,918 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:57:47" (1/1) ... [2025-01-09 02:57:47,920 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:57:47" (1/1) ... [2025-01-09 02:57:47,921 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:57:47" (1/1) ... [2025-01-09 02:57:47,921 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:57:47" (1/1) ... [2025-01-09 02:57:47,924 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 02:57:47,925 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 02:57:47,925 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 02:57:47,925 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 02:57:47,926 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:57:47" (1/1) ... [2025-01-09 02:57:47,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 02:57:47,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:57:47,951 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-01-09 02:57:47,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-01-09 02:57:47,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 02:57:47,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 02:57:47,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 02:57:47,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 02:57:48,013 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 02:57:48,015 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 02:57:48,097 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2025-01-09 02:57:48,098 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 02:57:48,107 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 02:57:48,107 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-09 02:57:48,107 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 02:57:48 BoogieIcfgContainer [2025-01-09 02:57:48,107 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 02:57:48,109 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 02:57:48,109 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 02:57:48,112 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 02:57:48,113 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 02:57:47" (1/3) ... [2025-01-09 02:57:48,113 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cbe611d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 02:57:48, skipping insertion in model container [2025-01-09 02:57:48,113 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:57:47" (2/3) ... [2025-01-09 02:57:48,113 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cbe611d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 02:57:48, skipping insertion in model container [2025-01-09 02:57:48,113 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 02:57:48" (3/3) ... [2025-01-09 02:57:48,114 INFO L128 eAbstractionObserver]: Analyzing ICFG half_2.i [2025-01-09 02:57:48,124 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 02:57:48,125 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG half_2.i that has 1 procedures, 12 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-01-09 02:57:48,174 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 02:57:48,189 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;@696f38ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 02:57:48,189 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-09 02:57:48,192 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:57:48,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-01-09 02:57:48,195 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:57:48,195 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-01-09 02:57:48,195 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:57:48,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:57:48,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1806937546, now seen corresponding path program 1 times [2025-01-09 02:57:48,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:57:48,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415585800] [2025-01-09 02:57:48,205 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 02:57:48,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:57:48,247 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-01-09 02:57:48,263 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-01-09 02:57:48,263 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 02:57:48,264 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:57:48,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:57:48,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:57:48,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415585800] [2025-01-09 02:57:48,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415585800] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 02:57:48,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 02:57:48,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 02:57:48,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679076333] [2025-01-09 02:57:48,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 02:57:48,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 02:57:48,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:57:48,505 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 02:57:48,505 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-09 02:57:48,507 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:57:48,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:57:48,552 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2025-01-09 02:57:48,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 02:57:48,554 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2025-01-09 02:57:48,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:57:48,558 INFO L225 Difference]: With dead ends: 24 [2025-01-09 02:57:48,558 INFO L226 Difference]: Without dead ends: 13 [2025-01-09 02:57:48,560 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-01-09 02:57:48,562 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 02:57:48,563 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 25 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 02:57:48,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2025-01-09 02:57:48,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2025-01-09 02:57:48,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:57:48,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2025-01-09 02:57:48,581 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2025-01-09 02:57:48,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:57:48,581 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2025-01-09 02:57:48,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:57:48,581 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2025-01-09 02:57:48,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-01-09 02:57:48,582 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:57:48,582 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 02:57:48,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-09 02:57:48,582 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:57:48,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:57:48,583 INFO L85 PathProgramCache]: Analyzing trace with hash 178519949, now seen corresponding path program 1 times [2025-01-09 02:57:48,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:57:48,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885194648] [2025-01-09 02:57:48,583 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 02:57:48,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:57:48,588 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-01-09 02:57:48,592 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-01-09 02:57:48,592 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 02:57:48,593 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:57:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:57:48,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:57:48,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885194648] [2025-01-09 02:57:48,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885194648] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:57:48,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072704187] [2025-01-09 02:57:48,740 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 02:57:48,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:57:48,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:57:48,744 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:57:48,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-01-09 02:57:48,772 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-01-09 02:57:48,784 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-01-09 02:57:48,784 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 02:57:48,785 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:57:48,787 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-09 02:57:48,790 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:57:48,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:57:48,927 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:57:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:57:49,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072704187] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:57:49,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:57:49,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-01-09 02:57:49,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084189328] [2025-01-09 02:57:49,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:57:49,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-09 02:57:49,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:57:49,107 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-09 02:57:49,108 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2025-01-09 02:57:49,108 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:57:49,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:57:49,292 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2025-01-09 02:57:49,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-09 02:57:49,293 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-01-09 02:57:49,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:57:49,293 INFO L225 Difference]: With dead ends: 24 [2025-01-09 02:57:49,294 INFO L226 Difference]: Without dead ends: 22 [2025-01-09 02:57:49,294 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2025-01-09 02:57:49,294 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 02:57:49,295 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 23 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 02:57:49,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2025-01-09 02:57:49,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 17. [2025-01-09 02:57:49,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:57:49,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2025-01-09 02:57:49,303 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 8 [2025-01-09 02:57:49,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:57:49,303 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2025-01-09 02:57:49,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:57:49,303 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2025-01-09 02:57:49,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-01-09 02:57:49,304 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:57:49,304 INFO L218 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 02:57:49,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-09 02:57:49,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:57:49,509 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:57:49,509 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:57:49,509 INFO L85 PathProgramCache]: Analyzing trace with hash -304032979, now seen corresponding path program 2 times [2025-01-09 02:57:49,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:57:49,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043730259] [2025-01-09 02:57:49,509 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 02:57:49,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:57:49,517 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 10 statements into 2 equivalence classes. [2025-01-09 02:57:49,535 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 10 of 10 statements. [2025-01-09 02:57:49,535 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 02:57:49,536 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:57:49,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:57:49,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:57:49,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043730259] [2025-01-09 02:57:49,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043730259] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:57:49,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736808614] [2025-01-09 02:57:49,655 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 02:57:49,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:57:49,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:57:49,657 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:57:49,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-01-09 02:57:49,680 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 10 statements into 2 equivalence classes. [2025-01-09 02:57:49,687 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 10 of 10 statements. [2025-01-09 02:57:49,688 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 02:57:49,688 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:57:49,688 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-01-09 02:57:49,689 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:57:49,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:57:49,763 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:57:49,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:57:49,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736808614] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:57:49,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:57:49,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2025-01-09 02:57:49,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675120586] [2025-01-09 02:57:49,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:57:49,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-01-09 02:57:49,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:57:49,835 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-01-09 02:57:49,835 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2025-01-09 02:57:49,836 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:57:49,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:57:49,923 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2025-01-09 02:57:49,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-09 02:57:49,923 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2025-01-09 02:57:49,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:57:49,923 INFO L225 Difference]: With dead ends: 27 [2025-01-09 02:57:49,923 INFO L226 Difference]: Without dead ends: 25 [2025-01-09 02:57:49,924 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2025-01-09 02:57:49,924 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 02:57:49,924 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 28 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 02:57:49,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-01-09 02:57:49,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 17. [2025-01-09 02:57:49,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:57:49,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2025-01-09 02:57:49,930 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2025-01-09 02:57:49,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:57:49,930 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2025-01-09 02:57:49,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:57:49,930 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2025-01-09 02:57:49,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-01-09 02:57:49,931 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:57:49,931 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 02:57:49,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-01-09 02:57:50,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:57:50,136 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:57:50,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:57:50,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1656125448, now seen corresponding path program 1 times [2025-01-09 02:57:50,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:57:50,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688537433] [2025-01-09 02:57:50,137 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 02:57:50,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:57:50,141 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-01-09 02:57:50,145 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-01-09 02:57:50,149 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 02:57:50,149 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:57:50,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:57:50,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:57:50,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688537433] [2025-01-09 02:57:50,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688537433] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:57:50,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162207157] [2025-01-09 02:57:50,224 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 02:57:50,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:57:50,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:57:50,226 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:57:50,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-01-09 02:57:50,248 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-01-09 02:57:50,253 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-01-09 02:57:50,253 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 02:57:50,253 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:57:50,254 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-09 02:57:50,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:57:50,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:57:50,293 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 02:57:50,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162207157] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 02:57:50,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 02:57:50,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2025-01-09 02:57:50,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43350361] [2025-01-09 02:57:50,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 02:57:50,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 02:57:50,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:57:50,294 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 02:57:50,294 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-01-09 02:57:50,295 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:57:50,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:57:50,315 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2025-01-09 02:57:50,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 02:57:50,315 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2025-01-09 02:57:50,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:57:50,316 INFO L225 Difference]: With dead ends: 24 [2025-01-09 02:57:50,316 INFO L226 Difference]: Without dead ends: 17 [2025-01-09 02:57:50,316 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-01-09 02:57:50,316 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 02:57:50,317 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 20 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 02:57:50,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2025-01-09 02:57:50,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2025-01-09 02:57:50,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:57:50,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2025-01-09 02:57:50,319 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 10 [2025-01-09 02:57:50,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:57:50,319 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2025-01-09 02:57:50,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:57:50,319 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2025-01-09 02:57:50,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-01-09 02:57:50,320 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:57:50,320 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 02:57:50,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-01-09 02:57:50,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:57:50,521 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:57:50,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:57:50,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1779229608, now seen corresponding path program 1 times [2025-01-09 02:57:50,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:57:50,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343623629] [2025-01-09 02:57:50,522 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 02:57:50,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:57:50,524 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-01-09 02:57:50,528 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-01-09 02:57:50,528 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 02:57:50,528 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:57:50,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:57:50,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:57:50,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343623629] [2025-01-09 02:57:50,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343623629] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:57:50,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754930255] [2025-01-09 02:57:50,744 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 02:57:50,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:57:50,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:57:50,749 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:57:50,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-01-09 02:57:50,769 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-01-09 02:57:50,776 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-01-09 02:57:50,776 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 02:57:50,776 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:57:50,777 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-01-09 02:57:50,778 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:57:50,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:57:50,860 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:57:51,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:57:51,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754930255] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:57:51,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:57:51,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2025-01-09 02:57:51,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309495860] [2025-01-09 02:57:51,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:57:51,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-09 02:57:51,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:57:51,063 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-09 02:57:51,063 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2025-01-09 02:57:51,065 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:57:51,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:57:51,373 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2025-01-09 02:57:51,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-01-09 02:57:51,373 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2025-01-09 02:57:51,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:57:51,373 INFO L225 Difference]: With dead ends: 41 [2025-01-09 02:57:51,374 INFO L226 Difference]: Without dead ends: 25 [2025-01-09 02:57:51,374 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2025-01-09 02:57:51,376 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 02:57:51,376 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 33 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 02:57:51,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-01-09 02:57:51,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 17. [2025-01-09 02:57:51,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:57:51,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2025-01-09 02:57:51,382 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2025-01-09 02:57:51,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:57:51,382 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2025-01-09 02:57:51,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:57:51,383 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2025-01-09 02:57:51,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-01-09 02:57:51,383 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:57:51,383 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2025-01-09 02:57:51,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-01-09 02:57:51,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:57:51,584 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:57:51,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:57:51,585 INFO L85 PathProgramCache]: Analyzing trace with hash 2020207661, now seen corresponding path program 2 times [2025-01-09 02:57:51,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:57:51,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934115575] [2025-01-09 02:57:51,585 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 02:57:51,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:57:51,589 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-01-09 02:57:51,596 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 02:57:51,596 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 02:57:51,596 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:57:51,706 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:57:51,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:57:51,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934115575] [2025-01-09 02:57:51,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934115575] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:57:51,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580860978] [2025-01-09 02:57:51,707 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 02:57:51,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:57:51,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:57:51,712 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:57:51,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-01-09 02:57:51,737 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-01-09 02:57:51,746 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 02:57:51,746 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 02:57:51,746 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:57:51,747 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-01-09 02:57:51,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:57:51,891 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:57:51,891 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:57:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:57:52,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580860978] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:57:52,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:57:52,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2025-01-09 02:57:52,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124823216] [2025-01-09 02:57:52,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:57:52,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-01-09 02:57:52,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:57:52,178 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-01-09 02:57:52,179 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2025-01-09 02:57:52,179 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:57:52,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:57:52,490 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2025-01-09 02:57:52,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-01-09 02:57:52,491 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2025-01-09 02:57:52,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:57:52,492 INFO L225 Difference]: With dead ends: 44 [2025-01-09 02:57:52,492 INFO L226 Difference]: Without dead ends: 30 [2025-01-09 02:57:52,493 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=223, Invalid=1037, Unknown=0, NotChecked=0, Total=1260 [2025-01-09 02:57:52,494 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 15 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 02:57:52,495 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 47 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 02:57:52,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-01-09 02:57:52,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2025-01-09 02:57:52,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:57:52,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2025-01-09 02:57:52,501 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2025-01-09 02:57:52,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:57:52,501 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2025-01-09 02:57:52,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:57:52,502 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2025-01-09 02:57:52,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-01-09 02:57:52,502 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:57:52,502 INFO L218 NwaCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2025-01-09 02:57:52,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-01-09 02:57:52,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:57:52,703 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:57:52,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:57:52,704 INFO L85 PathProgramCache]: Analyzing trace with hash 141159277, now seen corresponding path program 3 times [2025-01-09 02:57:52,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:57:52,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304604145] [2025-01-09 02:57:52,704 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 02:57:52,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:57:52,710 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 5 equivalence classes. [2025-01-09 02:57:52,723 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 02:57:52,724 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-01-09 02:57:52,724 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:57:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:57:52,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:57:52,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304604145] [2025-01-09 02:57:52,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304604145] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:57:52,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247553254] [2025-01-09 02:57:52,866 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 02:57:52,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:57:52,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:57:52,868 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:57:52,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-01-09 02:57:52,890 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 5 equivalence classes. [2025-01-09 02:57:52,902 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 02:57:52,902 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-01-09 02:57:52,902 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:57:52,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-01-09 02:57:52,904 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:57:53,041 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:57:53,041 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:57:53,185 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:57:53,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247553254] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:57:53,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:57:53,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2025-01-09 02:57:53,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707760082] [2025-01-09 02:57:53,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:57:53,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-01-09 02:57:53,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:57:53,186 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-01-09 02:57:53,187 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=726, Unknown=0, NotChecked=0, Total=930 [2025-01-09 02:57:53,187 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 31 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:57:53,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:57:53,417 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2025-01-09 02:57:53,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-01-09 02:57:53,417 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2025-01-09 02:57:53,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:57:53,418 INFO L225 Difference]: With dead ends: 60 [2025-01-09 02:57:53,418 INFO L226 Difference]: Without dead ends: 58 [2025-01-09 02:57:53,419 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=375, Invalid=1431, Unknown=0, NotChecked=0, Total=1806 [2025-01-09 02:57:53,419 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 8 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 02:57:53,420 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 40 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 02:57:53,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-01-09 02:57:53,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2025-01-09 02:57:53,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:57:53,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2025-01-09 02:57:53,427 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 20 [2025-01-09 02:57:53,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:57:53,428 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2025-01-09 02:57:53,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:57:53,428 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2025-01-09 02:57:53,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-01-09 02:57:53,428 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:57:53,428 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2025-01-09 02:57:53,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-01-09 02:57:53,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-01-09 02:57:53,629 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:57:53,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:57:53,630 INFO L85 PathProgramCache]: Analyzing trace with hash -2006368248, now seen corresponding path program 4 times [2025-01-09 02:57:53,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:57:53,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659266957] [2025-01-09 02:57:53,630 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 02:57:53,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:57:53,634 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-01-09 02:57:53,638 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 02:57:53,638 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 02:57:53,638 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:57:53,934 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:57:53,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:57:53,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659266957] [2025-01-09 02:57:53,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659266957] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:57:53,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443504838] [2025-01-09 02:57:53,934 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 02:57:53,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:57:53,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:57:53,940 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:57:53,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-01-09 02:57:53,962 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-01-09 02:57:53,971 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 02:57:53,971 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 02:57:53,971 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:57:53,972 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-01-09 02:57:53,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:57:54,213 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:57:54,213 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:57:54,573 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:57:54,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443504838] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:57:54,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:57:54,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2025-01-09 02:57:54,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624238937] [2025-01-09 02:57:54,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:57:54,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-01-09 02:57:54,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:57:54,574 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-01-09 02:57:54,574 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2025-01-09 02:57:54,574 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:57:55,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:57:55,043 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2025-01-09 02:57:55,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-01-09 02:57:55,044 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2025-01-09 02:57:55,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:57:55,044 INFO L225 Difference]: With dead ends: 88 [2025-01-09 02:57:55,044 INFO L226 Difference]: Without dead ends: 71 [2025-01-09 02:57:55,045 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=353, Invalid=1717, Unknown=0, NotChecked=0, Total=2070 [2025-01-09 02:57:55,046 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 02:57:55,046 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 58 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 02:57:55,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2025-01-09 02:57:55,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 33. [2025-01-09 02:57:55,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:57:55,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2025-01-09 02:57:55,056 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 20 [2025-01-09 02:57:55,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:57:55,056 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2025-01-09 02:57:55,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:57:55,058 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2025-01-09 02:57:55,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-01-09 02:57:55,058 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:57:55,058 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2025-01-09 02:57:55,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-01-09 02:57:55,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:57:55,259 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:57:55,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:57:55,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1072578765, now seen corresponding path program 5 times [2025-01-09 02:57:55,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:57:55,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20055564] [2025-01-09 02:57:55,260 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 02:57:55,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:57:55,272 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 24 statements into 5 equivalence classes. [2025-01-09 02:57:55,287 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 24 of 24 statements. [2025-01-09 02:57:55,288 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-01-09 02:57:55,288 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:57:55,623 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:57:55,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:57:55,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20055564] [2025-01-09 02:57:55,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20055564] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:57:55,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910559977] [2025-01-09 02:57:55,623 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 02:57:55,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:57:55,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:57:55,626 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:57:55,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-01-09 02:57:55,651 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 24 statements into 5 equivalence classes. [2025-01-09 02:57:55,664 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 24 of 24 statements. [2025-01-09 02:57:55,664 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-01-09 02:57:55,664 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:57:55,665 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-01-09 02:57:55,668 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:57:55,849 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:57:55,849 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:57:56,269 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:57:56,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910559977] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:57:56,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:57:56,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 32 [2025-01-09 02:57:56,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804051467] [2025-01-09 02:57:56,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:57:56,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-01-09 02:57:56,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:57:56,272 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-01-09 02:57:56,272 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2025-01-09 02:57:56,272 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:57:56,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:57:56,852 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2025-01-09 02:57:56,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-01-09 02:57:56,853 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2025-01-09 02:57:56,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:57:56,853 INFO L225 Difference]: With dead ends: 87 [2025-01-09 02:57:56,853 INFO L226 Difference]: Without dead ends: 67 [2025-01-09 02:57:56,854 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=394, Invalid=1958, Unknown=0, NotChecked=0, Total=2352 [2025-01-09 02:57:56,854 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 21 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 02:57:56,855 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 68 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 02:57:56,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2025-01-09 02:57:56,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 33. [2025-01-09 02:57:56,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:57:56,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2025-01-09 02:57:56,861 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 24 [2025-01-09 02:57:56,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:57:56,861 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2025-01-09 02:57:56,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:57:56,861 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2025-01-09 02:57:56,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-01-09 02:57:56,861 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:57:56,861 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2025-01-09 02:57:56,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-01-09 02:57:57,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:57:57,062 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:57:57,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:57:57,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1949381736, now seen corresponding path program 6 times [2025-01-09 02:57:57,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:57:57,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053005787] [2025-01-09 02:57:57,063 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 02:57:57,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:57:57,070 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 6 equivalence classes. [2025-01-09 02:57:57,088 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 28 of 28 statements. [2025-01-09 02:57:57,088 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-01-09 02:57:57,088 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:57:57,316 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:57:57,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:57:57,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053005787] [2025-01-09 02:57:57,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053005787] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:57:57,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815884205] [2025-01-09 02:57:57,318 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 02:57:57,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:57:57,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:57:57,320 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:57:57,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-01-09 02:57:57,343 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 6 equivalence classes. [2025-01-09 02:57:57,357 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 28 of 28 statements. [2025-01-09 02:57:57,357 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-01-09 02:57:57,357 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:57:57,358 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-01-09 02:57:57,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:57:57,617 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:57:57,617 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:57:58,152 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:57:58,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815884205] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:57:58,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:57:58,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 41 [2025-01-09 02:57:58,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742777324] [2025-01-09 02:57:58,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:57:58,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-01-09 02:57:58,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:57:58,154 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-01-09 02:57:58,154 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1387, Unknown=0, NotChecked=0, Total=1640 [2025-01-09 02:57:58,154 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 41 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 41 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:57:58,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:57:58,342 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2025-01-09 02:57:58,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-01-09 02:57:58,343 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 41 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2025-01-09 02:57:58,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:57:58,343 INFO L225 Difference]: With dead ends: 56 [2025-01-09 02:57:58,343 INFO L226 Difference]: Without dead ends: 33 [2025-01-09 02:57:58,344 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=289, Invalid=1517, Unknown=0, NotChecked=0, Total=1806 [2025-01-09 02:57:58,344 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 8 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 02:57:58,344 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 105 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 02:57:58,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2025-01-09 02:57:58,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2025-01-09 02:57:58,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:57:58,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2025-01-09 02:57:58,353 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2025-01-09 02:57:58,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:57:58,353 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2025-01-09 02:57:58,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 41 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:57:58,353 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2025-01-09 02:57:58,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-01-09 02:57:58,354 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:57:58,354 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2025-01-09 02:57:58,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-01-09 02:57:58,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:57:58,555 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:57:58,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:57:58,555 INFO L85 PathProgramCache]: Analyzing trace with hash 845348205, now seen corresponding path program 7 times [2025-01-09 02:57:58,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:57:58,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171292672] [2025-01-09 02:57:58,555 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 02:57:58,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:57:58,559 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-01-09 02:57:58,563 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-01-09 02:57:58,563 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 02:57:58,563 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:57:59,053 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 35 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:57:59,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:57:59,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171292672] [2025-01-09 02:57:59,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171292672] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:57:59,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922223235] [2025-01-09 02:57:59,054 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 02:57:59,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:57:59,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:57:59,056 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:57:59,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-01-09 02:57:59,085 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-01-09 02:57:59,096 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-01-09 02:57:59,097 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 02:57:59,097 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:57:59,097 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-01-09 02:57:59,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:57:59,372 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:57:59,372 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:57:59,969 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:57:59,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922223235] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:57:59,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:57:59,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 43 [2025-01-09 02:57:59,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550971633] [2025-01-09 02:57:59,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:57:59,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-01-09 02:57:59,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:57:59,971 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-01-09 02:57:59,971 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1523, Unknown=0, NotChecked=0, Total=1806 [2025-01-09 02:57:59,971 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 43 states, 43 states have (on average 1.930232558139535) internal successors, (83), 43 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:00,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:58:00,825 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2025-01-09 02:58:00,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-01-09 02:58:00,826 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.930232558139535) internal successors, (83), 43 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2025-01-09 02:58:00,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:58:00,826 INFO L225 Difference]: With dead ends: 88 [2025-01-09 02:58:00,826 INFO L226 Difference]: Without dead ends: 62 [2025-01-09 02:58:00,827 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=649, Invalid=3511, Unknown=0, NotChecked=0, Total=4160 [2025-01-09 02:58:00,828 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-09 02:58:00,828 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 101 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-09 02:58:00,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2025-01-09 02:58:00,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 44. [2025-01-09 02:58:00,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:00,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2025-01-09 02:58:00,836 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 32 [2025-01-09 02:58:00,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:58:00,836 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2025-01-09 02:58:00,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.930232558139535) internal successors, (83), 43 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:00,836 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2025-01-09 02:58:00,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-01-09 02:58:00,837 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:58:00,837 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2025-01-09 02:58:00,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-01-09 02:58:01,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:58:01,038 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:58:01,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:58:01,038 INFO L85 PathProgramCache]: Analyzing trace with hash 603111624, now seen corresponding path program 8 times [2025-01-09 02:58:01,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:58:01,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144834710] [2025-01-09 02:58:01,038 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 02:58:01,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:58:01,045 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes. [2025-01-09 02:58:01,050 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-01-09 02:58:01,050 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 02:58:01,050 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:58:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:01,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:58:01,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144834710] [2025-01-09 02:58:01,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144834710] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:58:01,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938815481] [2025-01-09 02:58:01,310 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 02:58:01,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:58:01,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:58:01,311 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:58:01,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-01-09 02:58:01,335 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes. [2025-01-09 02:58:01,349 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-01-09 02:58:01,349 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 02:58:01,349 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:58:01,351 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-01-09 02:58:01,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:58:01,713 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:01,714 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:58:02,414 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:02,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938815481] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:58:02,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:58:02,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 55 [2025-01-09 02:58:02,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471084512] [2025-01-09 02:58:02,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:58:02,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2025-01-09 02:58:02,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:58:02,415 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2025-01-09 02:58:02,416 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=2502, Unknown=0, NotChecked=0, Total=2970 [2025-01-09 02:58:02,416 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 55 states, 55 states have (on average 1.8363636363636364) internal successors, (101), 55 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:03,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:58:03,514 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2025-01-09 02:58:03,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2025-01-09 02:58:03,515 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.8363636363636364) internal successors, (101), 55 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2025-01-09 02:58:03,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:58:03,515 INFO L225 Difference]: With dead ends: 118 [2025-01-09 02:58:03,515 INFO L226 Difference]: Without dead ends: 89 [2025-01-09 02:58:03,517 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2188 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1003, Invalid=5477, Unknown=0, NotChecked=0, Total=6480 [2025-01-09 02:58:03,517 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 22 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-09 02:58:03,517 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 121 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-09 02:58:03,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2025-01-09 02:58:03,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 69. [2025-01-09 02:58:03,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.161764705882353) internal successors, (79), 68 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:03,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2025-01-09 02:58:03,550 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 36 [2025-01-09 02:58:03,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:58:03,550 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2025-01-09 02:58:03,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.8363636363636364) internal successors, (101), 55 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:03,550 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2025-01-09 02:58:03,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-01-09 02:58:03,551 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:58:03,551 INFO L218 NwaCegarLoop]: trace histogram [15, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2025-01-09 02:58:03,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-01-09 02:58:03,752 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-01-09 02:58:03,753 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:58:03,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:58:03,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1615092717, now seen corresponding path program 9 times [2025-01-09 02:58:03,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:58:03,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884263129] [2025-01-09 02:58:03,753 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 02:58:03,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:58:03,765 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 40 statements into 9 equivalence classes. [2025-01-09 02:58:03,793 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 40 of 40 statements. [2025-01-09 02:58:03,793 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-01-09 02:58:03,793 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:58:04,139 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 91 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:04,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:58:04,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884263129] [2025-01-09 02:58:04,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884263129] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:58:04,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693127765] [2025-01-09 02:58:04,139 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 02:58:04,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:58:04,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:58:04,141 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:58:04,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-01-09 02:58:04,167 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 40 statements into 9 equivalence classes. [2025-01-09 02:58:04,186 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 40 of 40 statements. [2025-01-09 02:58:04,187 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-01-09 02:58:04,187 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:58:04,188 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-01-09 02:58:04,189 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:58:04,541 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:04,541 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:58:04,936 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:04,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693127765] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:58:04,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:58:04,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 63 [2025-01-09 02:58:04,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021720895] [2025-01-09 02:58:04,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:58:04,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2025-01-09 02:58:04,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:58:04,937 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2025-01-09 02:58:04,938 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=834, Invalid=3072, Unknown=0, NotChecked=0, Total=3906 [2025-01-09 02:58:04,938 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand has 63 states, 63 states have (on average 1.492063492063492) internal successors, (94), 63 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:05,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:58:05,512 INFO L93 Difference]: Finished difference Result 231 states and 248 transitions. [2025-01-09 02:58:05,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2025-01-09 02:58:05,513 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.492063492063492) internal successors, (94), 63 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2025-01-09 02:58:05,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:58:05,516 INFO L225 Difference]: With dead ends: 231 [2025-01-09 02:58:05,516 INFO L226 Difference]: Without dead ends: 229 [2025-01-09 02:58:05,518 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2622 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1573, Invalid=6617, Unknown=0, NotChecked=0, Total=8190 [2025-01-09 02:58:05,518 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 13 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 02:58:05,518 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 67 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 02:58:05,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2025-01-09 02:58:05,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 65. [2025-01-09 02:58:05,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.125) internal successors, (72), 64 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:05,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2025-01-09 02:58:05,557 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 40 [2025-01-09 02:58:05,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:58:05,558 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2025-01-09 02:58:05,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.492063492063492) internal successors, (94), 63 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:05,558 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2025-01-09 02:58:05,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-01-09 02:58:05,558 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:58:05,558 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2025-01-09 02:58:05,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-01-09 02:58:05,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:58:05,759 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:58:05,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:58:05,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1400513037, now seen corresponding path program 10 times [2025-01-09 02:58:05,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:58:05,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917176510] [2025-01-09 02:58:05,760 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 02:58:05,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:58:05,766 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 40 statements into 2 equivalence classes. [2025-01-09 02:58:05,777 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-01-09 02:58:05,777 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 02:58:05,777 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:58:06,386 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 84 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:06,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:58:06,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917176510] [2025-01-09 02:58:06,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917176510] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:58:06,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270883001] [2025-01-09 02:58:06,387 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 02:58:06,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:58:06,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:58:06,389 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:58:06,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-01-09 02:58:06,421 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 40 statements into 2 equivalence classes. [2025-01-09 02:58:06,445 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-01-09 02:58:06,446 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 02:58:06,446 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:58:06,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-01-09 02:58:06,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:58:06,916 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:06,916 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:58:07,709 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:07,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270883001] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:58:07,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:58:07,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 62 [2025-01-09 02:58:07,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960010281] [2025-01-09 02:58:07,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:58:07,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2025-01-09 02:58:07,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:58:07,711 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2025-01-09 02:58:07,712 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=3185, Unknown=0, NotChecked=0, Total=3782 [2025-01-09 02:58:07,712 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 62 states, 62 states have (on average 1.8225806451612903) internal successors, (113), 62 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:09,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:58:09,154 INFO L93 Difference]: Finished difference Result 263 states and 275 transitions. [2025-01-09 02:58:09,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2025-01-09 02:58:09,155 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.8225806451612903) internal successors, (113), 62 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2025-01-09 02:58:09,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:58:09,155 INFO L225 Difference]: With dead ends: 263 [2025-01-09 02:58:09,156 INFO L226 Difference]: Without dead ends: 231 [2025-01-09 02:58:09,157 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2748 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1283, Invalid=6907, Unknown=0, NotChecked=0, Total=8190 [2025-01-09 02:58:09,157 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 21 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-01-09 02:58:09,158 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 141 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-01-09 02:58:09,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2025-01-09 02:58:09,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 65. [2025-01-09 02:58:09,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.109375) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:09,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2025-01-09 02:58:09,174 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 40 [2025-01-09 02:58:09,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:58:09,175 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2025-01-09 02:58:09,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.8225806451612903) internal successors, (113), 62 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:09,175 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2025-01-09 02:58:09,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-01-09 02:58:09,175 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:58:09,175 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2025-01-09 02:58:09,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-01-09 02:58:09,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:58:09,380 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:58:09,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:58:09,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1270605096, now seen corresponding path program 11 times [2025-01-09 02:58:09,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:58:09,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60374722] [2025-01-09 02:58:09,380 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 02:58:09,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:58:09,386 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 44 statements into 10 equivalence classes. [2025-01-09 02:58:09,402 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 44 of 44 statements. [2025-01-09 02:58:09,402 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-01-09 02:58:09,402 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:58:09,946 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 57 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:09,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:58:09,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60374722] [2025-01-09 02:58:09,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60374722] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:58:09,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183936844] [2025-01-09 02:58:09,946 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 02:58:09,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:58:09,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:58:09,952 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:58:09,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-01-09 02:58:09,980 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 44 statements into 10 equivalence classes. [2025-01-09 02:58:09,999 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 44 of 44 statements. [2025-01-09 02:58:09,999 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-01-09 02:58:09,999 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:58:10,000 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-01-09 02:58:10,001 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:58:10,407 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:10,408 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:58:11,336 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:11,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183936844] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:58:11,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:58:11,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 57 [2025-01-09 02:58:11,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138782501] [2025-01-09 02:58:11,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:58:11,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-01-09 02:58:11,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:58:11,338 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-01-09 02:58:11,339 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=2709, Unknown=0, NotChecked=0, Total=3192 [2025-01-09 02:58:11,339 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 57 states, 57 states have (on average 2.0) internal successors, (114), 57 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:13,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:58:13,167 INFO L93 Difference]: Finished difference Result 256 states and 269 transitions. [2025-01-09 02:58:13,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2025-01-09 02:58:13,167 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0) internal successors, (114), 57 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2025-01-09 02:58:13,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:58:13,168 INFO L225 Difference]: With dead ends: 256 [2025-01-09 02:58:13,168 INFO L226 Difference]: Without dead ends: 221 [2025-01-09 02:58:13,171 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1865 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1212, Invalid=6620, Unknown=0, NotChecked=0, Total=7832 [2025-01-09 02:58:13,171 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-01-09 02:58:13,171 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 175 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1222 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-01-09 02:58:13,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2025-01-09 02:58:13,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 65. [2025-01-09 02:58:13,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.09375) internal successors, (70), 64 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:13,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2025-01-09 02:58:13,197 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 44 [2025-01-09 02:58:13,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:58:13,197 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2025-01-09 02:58:13,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.0) internal successors, (114), 57 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:13,197 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2025-01-09 02:58:13,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-01-09 02:58:13,198 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:58:13,198 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2025-01-09 02:58:13,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-01-09 02:58:13,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-01-09 02:58:13,398 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:58:13,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:58:13,399 INFO L85 PathProgramCache]: Analyzing trace with hash -110776659, now seen corresponding path program 12 times [2025-01-09 02:58:13,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:58:13,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135613250] [2025-01-09 02:58:13,399 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 02:58:13,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:58:13,403 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 48 statements into 11 equivalence classes. [2025-01-09 02:58:13,420 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 48 of 48 statements. [2025-01-09 02:58:13,420 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-01-09 02:58:13,420 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:58:13,846 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 117 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:13,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:58:13,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135613250] [2025-01-09 02:58:13,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135613250] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:58:13,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140415715] [2025-01-09 02:58:13,846 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 02:58:13,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:58:13,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:58:13,848 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:58:13,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-01-09 02:58:13,879 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 48 statements into 11 equivalence classes. [2025-01-09 02:58:13,909 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 48 of 48 statements. [2025-01-09 02:58:13,909 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-01-09 02:58:13,909 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:58:13,910 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 58 conjuncts are in the unsatisfiable core [2025-01-09 02:58:13,917 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:58:14,591 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:14,592 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:58:15,814 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:15,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140415715] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:58:15,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:58:15,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 28] total 76 [2025-01-09 02:58:15,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995062891] [2025-01-09 02:58:15,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:58:15,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2025-01-09 02:58:15,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:58:15,816 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2025-01-09 02:58:15,816 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=846, Invalid=4854, Unknown=0, NotChecked=0, Total=5700 [2025-01-09 02:58:15,817 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 76 states, 76 states have (on average 1.8026315789473684) internal successors, (137), 76 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:17,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:58:17,689 INFO L93 Difference]: Finished difference Result 243 states and 257 transitions. [2025-01-09 02:58:17,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2025-01-09 02:58:17,690 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.8026315789473684) internal successors, (137), 76 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2025-01-09 02:58:17,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:58:17,691 INFO L225 Difference]: With dead ends: 243 [2025-01-09 02:58:17,691 INFO L226 Difference]: Without dead ends: 205 [2025-01-09 02:58:17,693 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4061 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1817, Invalid=10173, Unknown=0, NotChecked=0, Total=11990 [2025-01-09 02:58:17,694 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 1548 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 1621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-01-09 02:58:17,694 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 196 Invalid, 1621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1548 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-01-09 02:58:17,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2025-01-09 02:58:17,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 65. [2025-01-09 02:58:17,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.078125) internal successors, (69), 64 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:17,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2025-01-09 02:58:17,713 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 48 [2025-01-09 02:58:17,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:58:17,713 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2025-01-09 02:58:17,713 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.8026315789473684) internal successors, (137), 76 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:17,713 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2025-01-09 02:58:17,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-01-09 02:58:17,714 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:58:17,714 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2025-01-09 02:58:17,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-01-09 02:58:17,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-01-09 02:58:17,918 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:58:17,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:58:17,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1025155464, now seen corresponding path program 13 times [2025-01-09 02:58:17,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:58:17,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732875379] [2025-01-09 02:58:17,918 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 02:58:17,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:58:17,927 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-01-09 02:58:17,939 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-01-09 02:58:17,939 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 02:58:17,939 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:58:18,748 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 145 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:18,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:58:18,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732875379] [2025-01-09 02:58:18,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732875379] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:58:18,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608112681] [2025-01-09 02:58:18,749 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 02:58:18,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:58:18,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:58:18,750 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:58:18,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-01-09 02:58:18,787 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-01-09 02:58:18,807 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-01-09 02:58:18,807 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 02:58:18,807 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:58:18,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-01-09 02:58:18,815 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:58:19,348 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:19,349 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:58:20,761 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:20,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608112681] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:58:20,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:58:20,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 68 [2025-01-09 02:58:20,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835173754] [2025-01-09 02:58:20,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:58:20,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2025-01-09 02:58:20,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:58:20,762 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2025-01-09 02:58:20,763 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=678, Invalid=3878, Unknown=0, NotChecked=0, Total=4556 [2025-01-09 02:58:20,763 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 68 states, 68 states have (on average 2.0294117647058822) internal successors, (138), 68 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:23,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:58:23,261 INFO L93 Difference]: Finished difference Result 224 states and 239 transitions. [2025-01-09 02:58:23,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2025-01-09 02:58:23,262 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0294117647058822) internal successors, (138), 68 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2025-01-09 02:58:23,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:58:23,263 INFO L225 Difference]: With dead ends: 224 [2025-01-09 02:58:23,263 INFO L226 Difference]: Without dead ends: 183 [2025-01-09 02:58:23,264 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2673 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1654, Invalid=9266, Unknown=0, NotChecked=0, Total=10920 [2025-01-09 02:58:23,265 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 22 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 1643 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 1709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-01-09 02:58:23,265 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 219 Invalid, 1709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1643 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-01-09 02:58:23,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2025-01-09 02:58:23,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 65. [2025-01-09 02:58:23,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:23,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2025-01-09 02:58:23,288 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 52 [2025-01-09 02:58:23,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:58:23,288 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2025-01-09 02:58:23,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0294117647058822) internal successors, (138), 68 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:23,288 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2025-01-09 02:58:23,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-01-09 02:58:23,288 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:58:23,288 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2025-01-09 02:58:23,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-01-09 02:58:23,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-01-09 02:58:23,493 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:58:23,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:58:23,493 INFO L85 PathProgramCache]: Analyzing trace with hash -321412275, now seen corresponding path program 14 times [2025-01-09 02:58:23,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:58:23,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868794363] [2025-01-09 02:58:23,493 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 02:58:23,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:58:23,498 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 56 statements into 2 equivalence classes. [2025-01-09 02:58:23,503 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 56 of 56 statements. [2025-01-09 02:58:23,503 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 02:58:23,503 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:58:23,974 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 176 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:23,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:58:23,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868794363] [2025-01-09 02:58:23,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868794363] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:58:23,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993829624] [2025-01-09 02:58:23,974 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 02:58:23,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:58:23,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:58:23,977 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:58:23,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-01-09 02:58:24,010 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 56 statements into 2 equivalence classes. [2025-01-09 02:58:24,030 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 56 of 56 statements. [2025-01-09 02:58:24,030 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 02:58:24,030 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:58:24,031 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 57 conjuncts are in the unsatisfiable core [2025-01-09 02:58:24,033 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:58:24,744 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:24,744 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:58:25,938 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:25,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993829624] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:58:25,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:58:25,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 85 [2025-01-09 02:58:25,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700239437] [2025-01-09 02:58:25,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:58:25,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2025-01-09 02:58:25,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:58:25,939 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2025-01-09 02:58:25,939 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1073, Invalid=6067, Unknown=0, NotChecked=0, Total=7140 [2025-01-09 02:58:25,940 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 85 states, 85 states have (on average 1.8941176470588235) internal successors, (161), 85 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:28,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:58:28,908 INFO L93 Difference]: Finished difference Result 199 states and 215 transitions. [2025-01-09 02:58:28,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2025-01-09 02:58:28,908 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.8941176470588235) internal successors, (161), 85 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2025-01-09 02:58:28,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:58:28,911 INFO L225 Difference]: With dead ends: 199 [2025-01-09 02:58:28,911 INFO L226 Difference]: Without dead ends: 155 [2025-01-09 02:58:28,916 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5543 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2383, Invalid=13367, Unknown=0, NotChecked=0, Total=15750 [2025-01-09 02:58:28,916 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 1849 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 1927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-01-09 02:58:28,917 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 248 Invalid, 1927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1849 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-01-09 02:58:28,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2025-01-09 02:58:28,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 65. [2025-01-09 02:58:28,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.046875) internal successors, (67), 64 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:28,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2025-01-09 02:58:28,947 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 56 [2025-01-09 02:58:28,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:58:28,947 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2025-01-09 02:58:28,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.8941176470588235) internal successors, (161), 85 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:28,947 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2025-01-09 02:58:28,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2025-01-09 02:58:28,948 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:58:28,949 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2025-01-09 02:58:28,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-01-09 02:58:29,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-01-09 02:58:29,149 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:58:29,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:58:29,150 INFO L85 PathProgramCache]: Analyzing trace with hash -954403352, now seen corresponding path program 15 times [2025-01-09 02:58:29,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:58:29,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620077653] [2025-01-09 02:58:29,150 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 02:58:29,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:58:29,155 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 60 statements into 14 equivalence classes. [2025-01-09 02:58:29,181 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) and asserted 60 of 60 statements. [2025-01-09 02:58:29,181 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2025-01-09 02:58:29,181 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:58:30,026 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 210 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:30,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:58:30,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620077653] [2025-01-09 02:58:30,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620077653] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:58:30,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139846482] [2025-01-09 02:58:30,027 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 02:58:30,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:58:30,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:58:30,029 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:58:30,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-01-09 02:58:30,066 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 60 statements into 14 equivalence classes. [2025-01-09 02:58:30,096 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) and asserted 60 of 60 statements. [2025-01-09 02:58:30,096 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2025-01-09 02:58:30,096 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:58:30,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 70 conjuncts are in the unsatisfiable core [2025-01-09 02:58:30,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:58:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:31,011 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:58:32,681 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:32,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139846482] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:58:32,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:58:32,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 34] total 95 [2025-01-09 02:58:32,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801214034] [2025-01-09 02:58:32,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:58:32,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2025-01-09 02:58:32,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:58:32,683 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2025-01-09 02:58:32,683 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1314, Invalid=7616, Unknown=0, NotChecked=0, Total=8930 [2025-01-09 02:58:32,683 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 95 states, 95 states have (on average 1.8210526315789475) internal successors, (173), 95 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:35,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:58:35,893 INFO L93 Difference]: Finished difference Result 168 states and 185 transitions. [2025-01-09 02:58:35,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2025-01-09 02:58:35,893 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.8210526315789475) internal successors, (173), 95 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2025-01-09 02:58:35,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:58:35,895 INFO L225 Difference]: With dead ends: 168 [2025-01-09 02:58:35,895 INFO L226 Difference]: Without dead ends: 121 [2025-01-09 02:58:35,897 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6750 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2836, Invalid=16070, Unknown=0, NotChecked=0, Total=18906 [2025-01-09 02:58:35,898 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 24 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 2223 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 2330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 2223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-01-09 02:58:35,898 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 294 Invalid, 2330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 2223 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-01-09 02:58:35,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2025-01-09 02:58:35,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 65. [2025-01-09 02:58:35,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:35,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2025-01-09 02:58:35,938 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 60 [2025-01-09 02:58:35,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:58:35,938 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2025-01-09 02:58:35,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.8210526315789475) internal successors, (173), 95 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:35,938 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2025-01-09 02:58:35,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2025-01-09 02:58:35,939 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:58:35,939 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2025-01-09 02:58:35,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-01-09 02:58:36,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:58:36,141 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:58:36,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:58:36,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1996357651, now seen corresponding path program 16 times [2025-01-09 02:58:36,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:58:36,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466677583] [2025-01-09 02:58:36,143 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 02:58:36,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:58:36,151 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 64 statements into 2 equivalence classes. [2025-01-09 02:58:36,176 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 64 of 64 statements. [2025-01-09 02:58:36,176 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 02:58:36,176 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:58:37,455 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 273 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:37,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:58:37,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466677583] [2025-01-09 02:58:37,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466677583] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:58:37,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734398158] [2025-01-09 02:58:37,455 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 02:58:37,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:58:37,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:58:37,458 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:58:37,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-01-09 02:58:37,497 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 64 statements into 2 equivalence classes. [2025-01-09 02:58:37,523 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 64 of 64 statements. [2025-01-09 02:58:37,523 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 02:58:37,523 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:58:37,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 68 conjuncts are in the unsatisfiable core [2025-01-09 02:58:37,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:58:38,550 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:38,550 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:58:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:40,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734398158] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:58:40,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:58:40,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 98 [2025-01-09 02:58:40,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137277321] [2025-01-09 02:58:40,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:58:40,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2025-01-09 02:58:40,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:58:40,354 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2025-01-09 02:58:40,354 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=8075, Unknown=0, NotChecked=0, Total=9506 [2025-01-09 02:58:40,354 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 98 states, 98 states have (on average 1.8877551020408163) internal successors, (185), 98 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:44,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:58:44,383 INFO L93 Difference]: Finished difference Result 176 states and 195 transitions. [2025-01-09 02:58:44,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2025-01-09 02:58:44,384 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.8877551020408163) internal successors, (185), 98 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2025-01-09 02:58:44,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:58:44,385 INFO L225 Difference]: With dead ends: 176 [2025-01-09 02:58:44,385 INFO L226 Difference]: Without dead ends: 126 [2025-01-09 02:58:44,386 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7323 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=3191, Invalid=17689, Unknown=0, NotChecked=0, Total=20880 [2025-01-09 02:58:44,386 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 27 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 2422 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 2544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 2422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2025-01-09 02:58:44,386 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 348 Invalid, 2544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 2422 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2025-01-09 02:58:44,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2025-01-09 02:58:44,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 84. [2025-01-09 02:58:44,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.2048192771084338) internal successors, (100), 83 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:44,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2025-01-09 02:58:44,436 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 64 [2025-01-09 02:58:44,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:58:44,437 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2025-01-09 02:58:44,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.8877551020408163) internal successors, (185), 98 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:44,437 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2025-01-09 02:58:44,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2025-01-09 02:58:44,437 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:58:44,437 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1] [2025-01-09 02:58:44,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-01-09 02:58:44,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:58:44,650 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:58:44,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:58:44,651 INFO L85 PathProgramCache]: Analyzing trace with hash 374399560, now seen corresponding path program 17 times [2025-01-09 02:58:44,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:58:44,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469520735] [2025-01-09 02:58:44,651 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 02:58:44,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:58:44,656 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 68 statements into 16 equivalence classes. [2025-01-09 02:58:44,673 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) and asserted 68 of 68 statements. [2025-01-09 02:58:44,674 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2025-01-09 02:58:44,674 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:58:45,740 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 170 proven. 311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:45,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:58:45,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469520735] [2025-01-09 02:58:45,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469520735] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:58:45,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794287058] [2025-01-09 02:58:45,741 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 02:58:45,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:58:45,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:58:45,743 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:58:45,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-01-09 02:58:45,780 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 68 statements into 16 equivalence classes. [2025-01-09 02:58:45,812 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) and asserted 68 of 68 statements. [2025-01-09 02:58:45,812 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2025-01-09 02:58:45,812 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:58:45,813 INFO L256 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 69 conjuncts are in the unsatisfiable core [2025-01-09 02:58:45,817 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:58:46,577 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:46,577 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:58:48,584 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:48,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794287058] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:58:48,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:58:48,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 87 [2025-01-09 02:58:48,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130403595] [2025-01-09 02:58:48,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:58:48,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2025-01-09 02:58:48,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:58:48,585 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2025-01-09 02:58:48,586 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1078, Invalid=6404, Unknown=0, NotChecked=0, Total=7482 [2025-01-09 02:58:48,586 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand has 87 states, 87 states have (on average 2.0689655172413794) internal successors, (180), 87 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:52,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:58:52,815 INFO L93 Difference]: Finished difference Result 230 states and 250 transitions. [2025-01-09 02:58:52,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2025-01-09 02:58:52,815 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0689655172413794) internal successors, (180), 87 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2025-01-09 02:58:52,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:58:52,816 INFO L225 Difference]: With dead ends: 230 [2025-01-09 02:58:52,816 INFO L226 Difference]: Without dead ends: 177 [2025-01-09 02:58:52,818 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4635 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2807, Invalid=15825, Unknown=0, NotChecked=0, Total=18632 [2025-01-09 02:58:52,818 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 28 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 2701 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 2821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-01-09 02:58:52,819 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 430 Invalid, 2821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2701 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2025-01-09 02:58:52,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2025-01-09 02:58:52,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 133. [2025-01-09 02:58:52,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.143939393939394) internal successors, (151), 132 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:52,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 151 transitions. [2025-01-09 02:58:52,890 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 151 transitions. Word has length 68 [2025-01-09 02:58:52,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:58:52,890 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 151 transitions. [2025-01-09 02:58:52,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.0689655172413794) internal successors, (180), 87 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:52,891 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 151 transitions. [2025-01-09 02:58:52,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2025-01-09 02:58:52,891 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:58:52,891 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2025-01-09 02:58:52,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-01-09 02:58:53,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:58:53,092 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:58:53,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:58:53,092 INFO L85 PathProgramCache]: Analyzing trace with hash -610876275, now seen corresponding path program 18 times [2025-01-09 02:58:53,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:58:53,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393034142] [2025-01-09 02:58:53,092 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 02:58:53,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:58:53,098 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 72 statements into 17 equivalence classes. [2025-01-09 02:58:53,122 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) and asserted 72 of 72 statements. [2025-01-09 02:58:53,122 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2025-01-09 02:58:53,122 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:58:53,818 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 330 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:53,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:58:53,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393034142] [2025-01-09 02:58:53,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393034142] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:58:53,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122676855] [2025-01-09 02:58:53,818 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 02:58:53,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:58:53,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:58:53,822 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:58:53,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-01-09 02:58:53,860 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 72 statements into 17 equivalence classes. [2025-01-09 02:58:53,892 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) and asserted 72 of 72 statements. [2025-01-09 02:58:53,893 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2025-01-09 02:58:53,893 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:58:53,894 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 65 conjuncts are in the unsatisfiable core [2025-01-09 02:58:53,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:58:54,591 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:54,591 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:58:56,420 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:56,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122676855] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:58:56,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:58:56,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 40, 40] total 96 [2025-01-09 02:58:56,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125620747] [2025-01-09 02:58:56,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:58:56,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2025-01-09 02:58:56,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:58:56,422 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2025-01-09 02:58:56,422 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1298, Invalid=7822, Unknown=0, NotChecked=0, Total=9120 [2025-01-09 02:58:56,422 INFO L87 Difference]: Start difference. First operand 133 states and 151 transitions. Second operand has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 96 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:57,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:58:57,031 INFO L93 Difference]: Finished difference Result 189 states and 208 transitions. [2025-01-09 02:58:57,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2025-01-09 02:58:57,031 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 96 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2025-01-09 02:58:57,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:58:57,032 INFO L225 Difference]: With dead ends: 189 [2025-01-09 02:58:57,032 INFO L226 Difference]: Without dead ends: 133 [2025-01-09 02:58:57,032 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3713 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1378, Invalid=8128, Unknown=0, NotChecked=0, Total=9506 [2025-01-09 02:58:57,033 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-01-09 02:58:57,033 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 436 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-01-09 02:58:57,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2025-01-09 02:58:57,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2025-01-09 02:58:57,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.1363636363636365) internal successors, (150), 132 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:57,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 150 transitions. [2025-01-09 02:58:57,105 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 150 transitions. Word has length 72 [2025-01-09 02:58:57,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:58:57,105 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 150 transitions. [2025-01-09 02:58:57,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 96 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:58:57,106 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 150 transitions. [2025-01-09 02:58:57,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2025-01-09 02:58:57,106 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:58:57,106 INFO L218 NwaCegarLoop]: trace histogram [18, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2025-01-09 02:58:57,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-01-09 02:58:57,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-01-09 02:58:57,310 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:58:57,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:58:57,311 INFO L85 PathProgramCache]: Analyzing trace with hash -2031271126, now seen corresponding path program 19 times [2025-01-09 02:58:57,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:58:57,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072511102] [2025-01-09 02:58:57,311 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 02:58:57,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:58:57,316 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 73 statements into 1 equivalence classes. [2025-01-09 02:58:57,322 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 73 of 73 statements. [2025-01-09 02:58:57,322 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 02:58:57,322 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:58:58,035 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 136 proven. 427 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:58,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:58:58,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072511102] [2025-01-09 02:58:58,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072511102] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:58:58,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551225391] [2025-01-09 02:58:58,036 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 02:58:58,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:58:58,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:58:58,038 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:58:58,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-01-09 02:58:58,080 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 73 statements into 1 equivalence classes. [2025-01-09 02:58:58,102 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 73 of 73 statements. [2025-01-09 02:58:58,103 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 02:58:58,103 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:58:58,104 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 57 conjuncts are in the unsatisfiable core [2025-01-09 02:58:58,106 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:58:58,747 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 563 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:58,747 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:58:59,512 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 563 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:58:59,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551225391] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:58:59,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:58:59,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 75 [2025-01-09 02:58:59,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88437195] [2025-01-09 02:58:59,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:58:59,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2025-01-09 02:58:59,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:58:59,514 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2025-01-09 02:58:59,514 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=916, Invalid=4634, Unknown=0, NotChecked=0, Total=5550 [2025-01-09 02:58:59,514 INFO L87 Difference]: Start difference. First operand 133 states and 150 transitions. Second operand has 75 states, 75 states have (on average 1.5066666666666666) internal successors, (113), 75 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:59:00,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:59:00,304 INFO L93 Difference]: Finished difference Result 186 states and 205 transitions. [2025-01-09 02:59:00,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2025-01-09 02:59:00,304 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.5066666666666666) internal successors, (113), 75 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2025-01-09 02:59:00,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:59:00,305 INFO L225 Difference]: With dead ends: 186 [2025-01-09 02:59:00,305 INFO L226 Difference]: Without dead ends: 184 [2025-01-09 02:59:00,306 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 91 SyntacticMatches, 18 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4162 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1831, Invalid=9941, Unknown=0, NotChecked=0, Total=11772 [2025-01-09 02:59:00,306 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 02:59:00,306 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 76 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 02:59:00,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2025-01-09 02:59:00,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 77. [2025-01-09 02:59:00,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:59:00,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2025-01-09 02:59:00,347 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 73 [2025-01-09 02:59:00,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:59:00,347 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2025-01-09 02:59:00,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.5066666666666666) internal successors, (113), 75 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:59:00,347 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2025-01-09 02:59:00,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2025-01-09 02:59:00,351 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:59:00,351 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1] [2025-01-09 02:59:00,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-01-09 02:59:00,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-01-09 02:59:00,551 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:59:00,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:59:00,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1799067992, now seen corresponding path program 20 times [2025-01-09 02:59:00,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:59:00,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016176409] [2025-01-09 02:59:00,552 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 02:59:00,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:59:00,568 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 76 statements into 2 equivalence classes. [2025-01-09 02:59:00,586 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 76 of 76 statements. [2025-01-09 02:59:00,586 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 02:59:00,586 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:59:01,380 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 376 proven. 237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:59:01,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:59:01,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016176409] [2025-01-09 02:59:01,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016176409] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:59:01,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787381324] [2025-01-09 02:59:01,381 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 02:59:01,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:59:01,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:59:01,383 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:59:01,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-01-09 02:59:01,423 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 76 statements into 2 equivalence classes. [2025-01-09 02:59:01,449 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 76 of 76 statements. [2025-01-09 02:59:01,449 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 02:59:01,449 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:59:01,456 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 77 conjuncts are in the unsatisfiable core [2025-01-09 02:59:01,458 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:59:02,521 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:59:02,521 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:59:04,549 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:59:04,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787381324] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:59:04,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:59:04,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 115 [2025-01-09 02:59:04,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522353159] [2025-01-09 02:59:04,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:59:04,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2025-01-09 02:59:04,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:59:04,551 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2025-01-09 02:59:04,552 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1928, Invalid=11182, Unknown=0, NotChecked=0, Total=13110 [2025-01-09 02:59:04,552 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 115 states, 115 states have (on average 1.9217391304347826) internal successors, (221), 115 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:59:10,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:59:10,014 INFO L93 Difference]: Finished difference Result 209 states and 231 transitions. [2025-01-09 02:59:10,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2025-01-09 02:59:10,015 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.9217391304347826) internal successors, (221), 115 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2025-01-09 02:59:10,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:59:10,015 INFO L225 Difference]: With dead ends: 209 [2025-01-09 02:59:10,015 INFO L226 Difference]: Without dead ends: 150 [2025-01-09 02:59:10,017 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10423 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=4363, Invalid=24707, Unknown=0, NotChecked=0, Total=29070 [2025-01-09 02:59:10,020 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 26 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 3417 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 3570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 3417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-01-09 02:59:10,020 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 432 Invalid, 3570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 3417 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-01-09 02:59:10,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2025-01-09 02:59:10,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 99. [2025-01-09 02:59:10,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.2040816326530612) internal successors, (118), 98 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:59:10,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2025-01-09 02:59:10,118 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 76 [2025-01-09 02:59:10,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:59:10,118 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2025-01-09 02:59:10,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.9217391304347826) internal successors, (221), 115 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:59:10,118 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2025-01-09 02:59:10,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2025-01-09 02:59:10,118 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:59:10,118 INFO L218 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1] [2025-01-09 02:59:10,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-01-09 02:59:10,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2025-01-09 02:59:10,323 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:59:10,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:59:10,323 INFO L85 PathProgramCache]: Analyzing trace with hash -993529555, now seen corresponding path program 21 times [2025-01-09 02:59:10,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:59:10,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097778080] [2025-01-09 02:59:10,323 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 02:59:10,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:59:10,329 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 80 statements into 19 equivalence classes. [2025-01-09 02:59:10,342 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) and asserted 80 of 80 statements. [2025-01-09 02:59:10,342 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2025-01-09 02:59:10,342 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:59:11,259 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 425 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:59:11,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:59:11,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097778080] [2025-01-09 02:59:11,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097778080] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:59:11,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360073525] [2025-01-09 02:59:11,260 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 02:59:11,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:59:11,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:59:11,262 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:59:11,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-01-09 02:59:11,304 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 80 statements into 19 equivalence classes. [2025-01-09 02:59:11,345 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) and asserted 80 of 80 statements. [2025-01-09 02:59:11,345 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2025-01-09 02:59:11,346 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:59:11,347 INFO L256 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 66 conjuncts are in the unsatisfiable core [2025-01-09 02:59:11,348 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:59:12,779 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:59:12,779 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:59:15,182 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:59:15,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360073525] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:59:15,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:59:15,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 121 [2025-01-09 02:59:15,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361222364] [2025-01-09 02:59:15,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:59:15,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2025-01-09 02:59:15,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:59:15,184 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2025-01-09 02:59:15,185 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1834, Invalid=12686, Unknown=0, NotChecked=0, Total=14520 [2025-01-09 02:59:15,185 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand has 121 states, 121 states have (on average 1.9256198347107438) internal successors, (233), 121 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:59:16,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:59:16,510 INFO L93 Difference]: Finished difference Result 161 states and 181 transitions. [2025-01-09 02:59:16,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-01-09 02:59:16,510 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.9256198347107438) internal successors, (233), 121 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2025-01-09 02:59:16,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:59:16,511 INFO L225 Difference]: With dead ends: 161 [2025-01-09 02:59:16,511 INFO L226 Difference]: Without dead ends: 99 [2025-01-09 02:59:16,512 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5454 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2414, Invalid=17892, Unknown=0, NotChecked=0, Total=20306 [2025-01-09 02:59:16,512 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 10 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 1580 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 1582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-01-09 02:59:16,512 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 673 Invalid, 1582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1580 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-01-09 02:59:16,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2025-01-09 02:59:16,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2025-01-09 02:59:16,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.1938775510204083) internal successors, (117), 98 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:59:16,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2025-01-09 02:59:16,596 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 80 [2025-01-09 02:59:16,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:59:16,596 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2025-01-09 02:59:16,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.9256198347107438) internal successors, (233), 121 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:59:16,596 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2025-01-09 02:59:16,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2025-01-09 02:59:16,597 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:59:16,597 INFO L218 NwaCegarLoop]: trace histogram [20, 19, 18, 18, 1, 1, 1, 1, 1, 1] [2025-01-09 02:59:16,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-01-09 02:59:16,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-01-09 02:59:16,801 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:59:16,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:59:16,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1454932682, now seen corresponding path program 22 times [2025-01-09 02:59:16,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:59:16,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926052046] [2025-01-09 02:59:16,802 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 02:59:16,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:59:16,808 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 81 statements into 2 equivalence classes. [2025-01-09 02:59:16,819 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 81 of 81 statements. [2025-01-09 02:59:16,821 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 02:59:16,822 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:59:17,550 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 190 proven. 515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:59:17,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:59:17,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926052046] [2025-01-09 02:59:17,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926052046] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:59:17,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262260733] [2025-01-09 02:59:17,551 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 02:59:17,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:59:17,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:59:17,554 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:59:17,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-01-09 02:59:17,598 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 81 statements into 2 equivalence classes. [2025-01-09 02:59:17,625 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 81 of 81 statements. [2025-01-09 02:59:17,625 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 02:59:17,625 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:59:17,626 INFO L256 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 66 conjuncts are in the unsatisfiable core [2025-01-09 02:59:17,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:59:18,292 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:59:18,293 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:59:19,135 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:59:19,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262260733] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:59:19,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:59:19,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 83 [2025-01-09 02:59:19,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482037505] [2025-01-09 02:59:19,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:59:19,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2025-01-09 02:59:19,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:59:19,137 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2025-01-09 02:59:19,137 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=5651, Unknown=0, NotChecked=0, Total=6806 [2025-01-09 02:59:19,138 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand has 83 states, 83 states have (on average 1.5060240963855422) internal successors, (125), 83 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:59:20,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:59:20,173 INFO L93 Difference]: Finished difference Result 158 states and 177 transitions. [2025-01-09 02:59:20,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2025-01-09 02:59:20,174 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.5060240963855422) internal successors, (125), 83 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2025-01-09 02:59:20,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:59:20,175 INFO L225 Difference]: With dead ends: 158 [2025-01-09 02:59:20,175 INFO L226 Difference]: Without dead ends: 156 [2025-01-09 02:59:20,176 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 102 SyntacticMatches, 19 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5210 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2292, Invalid=12228, Unknown=0, NotChecked=0, Total=14520 [2025-01-09 02:59:20,177 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-09 02:59:20,178 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 88 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-09 02:59:20,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2025-01-09 02:59:20,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 85. [2025-01-09 02:59:20,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:59:20,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2025-01-09 02:59:20,249 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 81 [2025-01-09 02:59:20,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:59:20,249 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2025-01-09 02:59:20,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.5060240963855422) internal successors, (125), 83 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:59:20,249 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2025-01-09 02:59:20,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2025-01-09 02:59:20,250 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:59:20,250 INFO L218 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1] [2025-01-09 02:59:20,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-01-09 02:59:20,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-01-09 02:59:20,451 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:59:20,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:59:20,451 INFO L85 PathProgramCache]: Analyzing trace with hash -905608440, now seen corresponding path program 23 times [2025-01-09 02:59:20,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:59:20,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576610780] [2025-01-09 02:59:20,451 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 02:59:20,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:59:20,461 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 84 statements into 20 equivalence classes. [2025-01-09 02:59:20,500 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) and asserted 84 of 84 statements. [2025-01-09 02:59:20,503 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2025-01-09 02:59:20,503 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:59:22,225 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 285 proven. 476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:59:22,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:59:22,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576610780] [2025-01-09 02:59:22,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576610780] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:59:22,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355674308] [2025-01-09 02:59:22,226 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 02:59:22,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:59:22,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:59:22,228 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 02:59:22,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-01-09 02:59:22,275 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 84 statements into 20 equivalence classes. [2025-01-09 02:59:22,316 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) and asserted 84 of 84 statements. [2025-01-09 02:59:22,316 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2025-01-09 02:59:22,316 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:59:22,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 85 conjuncts are in the unsatisfiable core [2025-01-09 02:59:22,320 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:59:23,468 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:59:23,468 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:59:26,437 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:59:26,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355674308] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:59:26,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:59:26,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 107 [2025-01-09 02:59:26,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096407516] [2025-01-09 02:59:26,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:59:26,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2025-01-09 02:59:26,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:59:26,439 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2025-01-09 02:59:26,440 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1608, Invalid=9734, Unknown=0, NotChecked=0, Total=11342 [2025-01-09 02:59:26,440 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 107 states, 107 states have (on average 2.0934579439252334) internal successors, (224), 107 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)