./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c00e63dc 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 71679b2a85162a2bf4315b62ab1893b5cfd06e20fc9e264973bd31bc9d08e300 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 10:04:54,898 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 10:04:54,972 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 10:04:54,979 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 10:04:54,981 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 10:04:55,008 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 10:04:55,009 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 10:04:55,010 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 10:04:55,010 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 10:04:55,010 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 10:04:55,011 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 10:04:55,011 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 10:04:55,011 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 10:04:55,011 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 10:04:55,012 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 10:04:55,012 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 10:04:55,012 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 10:04:55,012 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 10:04:55,012 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 10:04:55,013 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 10:04:55,013 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 10:04:55,013 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 10:04:55,013 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 10:04:55,013 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 10:04:55,013 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 10:04:55,013 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 10:04:55,013 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 10:04:55,013 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 10:04:55,013 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 10:04:55,013 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 10:04:55,013 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 10:04:55,013 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 10:04:55,013 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 10:04:55,014 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 10:04:55,014 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 10:04:55,015 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 10:04:55,015 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 10:04:55,015 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 10:04:55,015 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 10:04:55,015 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 10:04:55,015 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 10:04:55,015 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 10:04:55,015 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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) 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 -> 71679b2a85162a2bf4315b62ab1893b5cfd06e20fc9e264973bd31bc9d08e300 [2025-02-06 10:04:55,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 10:04:55,304 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 10:04:55,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 10:04:55,307 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 10:04:55,307 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 10:04:55,308 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i [2025-02-06 10:04:56,582 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/975576d86/27a85155f1d34288a203c172683ed347/FLAGda0c2898e [2025-02-06 10:04:56,903 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 10:04:56,904 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i [2025-02-06 10:04:56,915 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/975576d86/27a85155f1d34288a203c172683ed347/FLAGda0c2898e [2025-02-06 10:04:56,929 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/975576d86/27a85155f1d34288a203c172683ed347 [2025-02-06 10:04:56,933 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 10:04:56,935 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 10:04:56,937 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 10:04:56,937 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 10:04:56,940 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 10:04:56,941 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 10:04:56" (1/1) ... [2025-02-06 10:04:56,942 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7729f0e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:04:56, skipping insertion in model container [2025-02-06 10:04:56,942 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 10:04:56" (1/1) ... [2025-02-06 10:04:56,962 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 10:04:57,205 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-02-06 10:04:57,208 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 10:04:57,217 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 10:04:57,268 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 10:04:57,294 INFO L204 MainTranslator]: Completed translation [2025-02-06 10:04:57,297 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:04:57 WrapperNode [2025-02-06 10:04:57,297 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 10:04:57,298 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 10:04:57,298 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 10:04:57,298 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 10:04:57,302 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:04:57" (1/1) ... [2025-02-06 10:04:57,310 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:04:57" (1/1) ... [2025-02-06 10:04:57,324 INFO L138 Inliner]: procedures = 117, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 57 [2025-02-06 10:04:57,325 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 10:04:57,325 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 10:04:57,325 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 10:04:57,325 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 10:04:57,331 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:04:57" (1/1) ... [2025-02-06 10:04:57,331 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:04:57" (1/1) ... [2025-02-06 10:04:57,333 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:04:57" (1/1) ... [2025-02-06 10:04:57,344 INFO L175 MemorySlicer]: Split 5 memory accesses to 1 slices as follows [5]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 2 writes are split as follows [2]. [2025-02-06 10:04:57,345 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:04:57" (1/1) ... [2025-02-06 10:04:57,345 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:04:57" (1/1) ... [2025-02-06 10:04:57,349 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:04:57" (1/1) ... [2025-02-06 10:04:57,350 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:04:57" (1/1) ... [2025-02-06 10:04:57,351 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:04:57" (1/1) ... [2025-02-06 10:04:57,351 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:04:57" (1/1) ... [2025-02-06 10:04:57,353 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 10:04:57,353 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 10:04:57,353 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 10:04:57,354 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 10:04:57,354 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:04:57" (1/1) ... [2025-02-06 10:04:57,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 10:04:57,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:04:57,387 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) [2025-02-06 10:04:57,390 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 [2025-02-06 10:04:57,407 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 10:04:57,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 10:04:57,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-06 10:04:57,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-06 10:04:57,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 10:04:57,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 10:04:57,490 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 10:04:57,491 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 10:04:57,667 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L525: call ULTIMATE.dealloc(main_#t~malloc8#1.base, main_#t~malloc8#1.offset);havoc main_#t~malloc8#1.base, main_#t~malloc8#1.offset; [2025-02-06 10:04:57,671 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L518: havoc cstrchr_#t~mem6#1; [2025-02-06 10:04:57,684 INFO L? ?]: Removed 40 outVars from TransFormulas that were not future-live. [2025-02-06 10:04:57,686 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 10:04:57,696 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 10:04:57,696 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 10:04:57,697 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 10:04:57 BoogieIcfgContainer [2025-02-06 10:04:57,697 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 10:04:57,699 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 10:04:57,699 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 10:04:57,704 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 10:04:57,704 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 10:04:56" (1/3) ... [2025-02-06 10:04:57,705 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2762e676 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 10:04:57, skipping insertion in model container [2025-02-06 10:04:57,705 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 10:04:57" (2/3) ... [2025-02-06 10:04:57,706 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2762e676 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 10:04:57, skipping insertion in model container [2025-02-06 10:04:57,707 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 10:04:57" (3/3) ... [2025-02-06 10:04:57,708 INFO L128 eAbstractionObserver]: Analyzing ICFG cstrchr-alloca-2.i [2025-02-06 10:04:57,722 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 10:04:57,724 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG cstrchr-alloca-2.i that has 1 procedures, 33 locations, 1 initial locations, 2 loop locations, and 11 error locations. [2025-02-06 10:04:57,763 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 10:04:57,774 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=None, 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;@64d6f137, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 10:04:57,776 INFO L334 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2025-02-06 10:04:57,781 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.7619047619047619) 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) [2025-02-06 10:04:57,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2025-02-06 10:04:57,787 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:04:57,788 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-06 10:04:57,788 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:04:57,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:04:57,794 INFO L85 PathProgramCache]: Analyzing trace with hash 2099408477, now seen corresponding path program 1 times [2025-02-06 10:04:57,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:04:57,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958186993] [2025-02-06 10:04:57,801 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:04:57,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:04:57,872 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 10:04:57,887 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 10:04:57,888 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:04:57,888 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:04:57,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:04:57,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:04:57,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958186993] [2025-02-06 10:04:57,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958186993] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:04:57,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:04:57,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 10:04:57,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75741424] [2025-02-06 10:04:57,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:04:58,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 10:04:58,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:04:58,027 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 10:04:58,028 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-06 10:04:58,029 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.7619047619047619) 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) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2025-02-06 10:04:58,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:04:58,073 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2025-02-06 10:04:58,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 10:04:58,075 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2025-02-06 10:04:58,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:04:58,079 INFO L225 Difference]: With dead ends: 37 [2025-02-06 10:04:58,079 INFO L226 Difference]: Without dead ends: 35 [2025-02-06 10:04:58,081 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-06 10:04:58,083 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-06 10:04:58,084 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 60 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-06 10:04:58,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2025-02-06 10:04:58,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2025-02-06 10:04:58,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.6363636363636365) 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) [2025-02-06 10:04:58,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2025-02-06 10:04:58,115 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 6 [2025-02-06 10:04:58,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:04:58,115 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2025-02-06 10:04:58,115 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2025-02-06 10:04:58,115 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2025-02-06 10:04:58,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2025-02-06 10:04:58,116 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:04:58,116 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-06 10:04:58,116 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 10:04:58,116 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:04:58,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:04:58,117 INFO L85 PathProgramCache]: Analyzing trace with hash 2099408317, now seen corresponding path program 1 times [2025-02-06 10:04:58,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:04:58,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735144431] [2025-02-06 10:04:58,117 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:04:58,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:04:58,126 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 10:04:58,136 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 10:04:58,137 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:04:58,137 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:04:58,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:04:58,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:04:58,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735144431] [2025-02-06 10:04:58,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735144431] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:04:58,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:04:58,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 10:04:58,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981361172] [2025-02-06 10:04:58,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:04:58,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 10:04:58,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:04:58,201 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 10:04:58,201 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 10:04:58,201 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2025-02-06 10:04:58,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:04:58,237 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2025-02-06 10:04:58,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 10:04:58,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2025-02-06 10:04:58,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:04:58,239 INFO L225 Difference]: With dead ends: 31 [2025-02-06 10:04:58,240 INFO L226 Difference]: Without dead ends: 31 [2025-02-06 10:04:58,240 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 10:04:58,241 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 4 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-06 10:04:58,242 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 40 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-06 10:04:58,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-02-06 10:04:58,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2025-02-06 10:04:58,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 30 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) [2025-02-06 10:04:58,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2025-02-06 10:04:58,245 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 6 [2025-02-06 10:04:58,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:04:58,245 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2025-02-06 10:04:58,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2025-02-06 10:04:58,245 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2025-02-06 10:04:58,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2025-02-06 10:04:58,246 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:04:58,246 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-06 10:04:58,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 10:04:58,246 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:04:58,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:04:58,246 INFO L85 PathProgramCache]: Analyzing trace with hash 2099408318, now seen corresponding path program 1 times [2025-02-06 10:04:58,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:04:58,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188480053] [2025-02-06 10:04:58,247 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:04:58,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:04:58,261 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 10:04:58,270 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 10:04:58,270 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:04:58,270 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:04:58,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:04:58,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:04:58,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188480053] [2025-02-06 10:04:58,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188480053] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:04:58,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:04:58,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 10:04:58,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708191355] [2025-02-06 10:04:58,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:04:58,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 10:04:58,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:04:58,476 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 10:04:58,476 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-06 10:04:58,476 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2025-02-06 10:04:58,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:04:58,501 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2025-02-06 10:04:58,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 10:04:58,504 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2025-02-06 10:04:58,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:04:58,504 INFO L225 Difference]: With dead ends: 32 [2025-02-06 10:04:58,504 INFO L226 Difference]: Without dead ends: 32 [2025-02-06 10:04:58,504 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-06 10:04:58,505 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-06 10:04:58,505 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-06 10:04:58,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-02-06 10:04:58,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2025-02-06 10:04:58,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 31 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) [2025-02-06 10:04:58,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2025-02-06 10:04:58,511 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 6 [2025-02-06 10:04:58,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:04:58,511 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2025-02-06 10:04:58,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2025-02-06 10:04:58,512 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2025-02-06 10:04:58,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2025-02-06 10:04:58,513 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:04:58,513 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-06 10:04:58,513 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-06 10:04:58,513 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:04:58,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:04:58,517 INFO L85 PathProgramCache]: Analyzing trace with hash 2099438269, now seen corresponding path program 1 times [2025-02-06 10:04:58,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:04:58,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976035500] [2025-02-06 10:04:58,518 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:04:58,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:04:58,524 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 10:04:58,533 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 10:04:58,533 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:04:58,533 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:04:58,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:04:58,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:04:58,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976035500] [2025-02-06 10:04:58,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976035500] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:04:58,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:04:58,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 10:04:58,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784961542] [2025-02-06 10:04:58,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:04:58,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 10:04:58,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:04:58,705 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 10:04:58,706 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 10:04:58,707 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 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) [2025-02-06 10:04:58,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:04:58,790 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2025-02-06 10:04:58,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 10:04:58,793 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 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 6 [2025-02-06 10:04:58,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:04:58,793 INFO L225 Difference]: With dead ends: 35 [2025-02-06 10:04:58,793 INFO L226 Difference]: Without dead ends: 35 [2025-02-06 10:04:58,793 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-02-06 10:04:58,794 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 12 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-06 10:04:58,794 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 58 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-06 10:04:58,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2025-02-06 10:04:58,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2025-02-06 10:04:58,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.52) internal successors, (38), 33 states have internal predecessors, (38), 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) [2025-02-06 10:04:58,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2025-02-06 10:04:58,801 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 6 [2025-02-06 10:04:58,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:04:58,801 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2025-02-06 10:04:58,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 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) [2025-02-06 10:04:58,801 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2025-02-06 10:04:58,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2025-02-06 10:04:58,801 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:04:58,801 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-06 10:04:58,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 10:04:58,802 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:04:58,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:04:58,802 INFO L85 PathProgramCache]: Analyzing trace with hash 2099438109, now seen corresponding path program 1 times [2025-02-06 10:04:58,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:04:58,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942923732] [2025-02-06 10:04:58,802 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:04:58,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:04:58,813 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 10:04:58,815 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 10:04:58,816 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:04:58,816 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:04:58,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:04:58,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:04:58,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942923732] [2025-02-06 10:04:58,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942923732] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:04:58,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:04:58,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 10:04:58,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567786469] [2025-02-06 10:04:58,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:04:58,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 10:04:58,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:04:58,943 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 10:04:58,943 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-02-06 10:04:58,944 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 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) [2025-02-06 10:04:58,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:04:58,966 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2025-02-06 10:04:58,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 10:04:58,968 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 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 6 [2025-02-06 10:04:58,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:04:58,968 INFO L225 Difference]: With dead ends: 33 [2025-02-06 10:04:58,968 INFO L226 Difference]: Without dead ends: 33 [2025-02-06 10:04:58,969 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-02-06 10:04:58,969 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-06 10:04:58,969 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 65 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-06 10:04:58,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2025-02-06 10:04:58,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2025-02-06 10:04:58,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.5) internal successors, (36), 31 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) [2025-02-06 10:04:58,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2025-02-06 10:04:58,975 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2025-02-06 10:04:58,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:04:58,975 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2025-02-06 10:04:58,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 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) [2025-02-06 10:04:58,975 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2025-02-06 10:04:58,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-02-06 10:04:58,975 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:04:58,975 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:04:58,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-06 10:04:58,975 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:04:58,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:04:58,976 INFO L85 PathProgramCache]: Analyzing trace with hash 159404349, now seen corresponding path program 1 times [2025-02-06 10:04:58,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:04:58,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000634232] [2025-02-06 10:04:58,976 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:04:58,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:04:58,986 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 10:04:58,989 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 10:04:58,993 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:04:58,993 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:04:59,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:04:59,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:04:59,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000634232] [2025-02-06 10:04:59,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000634232] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:04:59,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:04:59,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 10:04:59,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004002550] [2025-02-06 10:04:59,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:04:59,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 10:04:59,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:04:59,027 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 10:04:59,030 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 10:04:59,031 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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) [2025-02-06 10:04:59,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:04:59,082 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2025-02-06 10:04:59,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 10:04:59,082 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2025-02-06 10:04:59,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:04:59,083 INFO L225 Difference]: With dead ends: 29 [2025-02-06 10:04:59,083 INFO L226 Difference]: Without dead ends: 29 [2025-02-06 10:04:59,084 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 10:04:59,086 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 12 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-06 10:04:59,086 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 29 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-06 10:04:59,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-02-06 10:04:59,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2025-02-06 10:04:59,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.375) internal successors, (33), 28 states have internal predecessors, (33), 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) [2025-02-06 10:04:59,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2025-02-06 10:04:59,090 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 9 [2025-02-06 10:04:59,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:04:59,090 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2025-02-06 10:04:59,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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) [2025-02-06 10:04:59,092 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2025-02-06 10:04:59,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-02-06 10:04:59,093 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:04:59,093 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:04:59,093 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-06 10:04:59,093 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:04:59,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:04:59,094 INFO L85 PathProgramCache]: Analyzing trace with hash 159404350, now seen corresponding path program 1 times [2025-02-06 10:04:59,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:04:59,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584683672] [2025-02-06 10:04:59,094 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:04:59,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:04:59,102 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 10:04:59,108 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 10:04:59,109 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:04:59,109 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:04:59,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:04:59,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:04:59,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584683672] [2025-02-06 10:04:59,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584683672] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:04:59,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:04:59,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 10:04:59,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769286045] [2025-02-06 10:04:59,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:04:59,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 10:04:59,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:04:59,254 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 10:04:59,254 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-06 10:04:59,254 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 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) [2025-02-06 10:04:59,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:04:59,337 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2025-02-06 10:04:59,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 10:04:59,337 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 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 9 [2025-02-06 10:04:59,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:04:59,338 INFO L225 Difference]: With dead ends: 39 [2025-02-06 10:04:59,338 INFO L226 Difference]: Without dead ends: 39 [2025-02-06 10:04:59,338 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-02-06 10:04:59,339 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 15 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-06 10:04:59,339 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 60 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-06 10:04:59,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2025-02-06 10:04:59,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2025-02-06 10:04:59,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.34375) internal successors, (43), 36 states have internal predecessors, (43), 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) [2025-02-06 10:04:59,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2025-02-06 10:04:59,342 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 9 [2025-02-06 10:04:59,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:04:59,342 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2025-02-06 10:04:59,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 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) [2025-02-06 10:04:59,343 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2025-02-06 10:04:59,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-02-06 10:04:59,343 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:04:59,343 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:04:59,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-02-06 10:04:59,343 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:04:59,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:04:59,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1051679748, now seen corresponding path program 1 times [2025-02-06 10:04:59,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:04:59,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308245117] [2025-02-06 10:04:59,344 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:04:59,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:04:59,380 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 10:04:59,387 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 10:04:59,388 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:04:59,388 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:04:59,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:04:59,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:04:59,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308245117] [2025-02-06 10:04:59,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308245117] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 10:04:59,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718836630] [2025-02-06 10:04:59,587 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:04:59,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:04:59,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:04:59,591 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) [2025-02-06 10:04:59,593 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 [2025-02-06 10:04:59,633 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 10:04:59,641 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 10:04:59,641 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:04:59,642 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:04:59,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-06 10:04:59,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:04:59,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2025-02-06 10:04:59,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:04:59,888 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 10:05:00,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:00,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718836630] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 10:05:00,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 10:05:00,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2025-02-06 10:05:00,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714068429] [2025-02-06 10:05:00,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 10:05:00,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-06 10:05:00,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:05:00,116 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-06 10:05:00,116 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2025-02-06 10:05:00,117 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 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) [2025-02-06 10:05:00,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:05:00,327 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2025-02-06 10:05:00,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 10:05:00,328 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 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 9 [2025-02-06 10:05:00,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:05:00,329 INFO L225 Difference]: With dead ends: 38 [2025-02-06 10:05:00,329 INFO L226 Difference]: Without dead ends: 38 [2025-02-06 10:05:00,330 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2025-02-06 10:05:00,330 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 9 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-06 10:05:00,330 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 92 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-06 10:05:00,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-02-06 10:05:00,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2025-02-06 10:05:00,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.3) internal successors, (39), 33 states have internal predecessors, (39), 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) [2025-02-06 10:05:00,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2025-02-06 10:05:00,333 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 9 [2025-02-06 10:05:00,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:05:00,334 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2025-02-06 10:05:00,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 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) [2025-02-06 10:05:00,334 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2025-02-06 10:05:00,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-02-06 10:05:00,334 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:05:00,335 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:05:00,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-06 10:05:00,539 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:05:00,539 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:05:00,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:05:00,540 INFO L85 PathProgramCache]: Analyzing trace with hash -2036444942, now seen corresponding path program 1 times [2025-02-06 10:05:00,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:05:00,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507763711] [2025-02-06 10:05:00,540 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:05:00,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:05:00,547 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 10:05:00,554 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 10:05:00,554 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:05:00,554 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:00,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:00,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:05:00,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507763711] [2025-02-06 10:05:00,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507763711] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:05:00,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:05:00,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 10:05:00,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360891919] [2025-02-06 10:05:00,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:05:00,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 10:05:00,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:05:00,568 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 10:05:00,568 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 10:05:00,569 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2025-02-06 10:05:00,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:05:00,581 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2025-02-06 10:05:00,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 10:05:00,582 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) Word has length 14 [2025-02-06 10:05:00,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:05:00,582 INFO L225 Difference]: With dead ends: 36 [2025-02-06 10:05:00,583 INFO L226 Difference]: Without dead ends: 36 [2025-02-06 10:05:00,583 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 10:05:00,583 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-06 10:05:00,584 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-06 10:05:00,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-02-06 10:05:00,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2025-02-06 10:05:00,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.28125) internal successors, (41), 35 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) [2025-02-06 10:05:00,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2025-02-06 10:05:00,589 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 14 [2025-02-06 10:05:00,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:05:00,589 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2025-02-06 10:05:00,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2025-02-06 10:05:00,589 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2025-02-06 10:05:00,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-02-06 10:05:00,591 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:05:00,591 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:05:00,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-06 10:05:00,592 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:05:00,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:05:00,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1454408884, now seen corresponding path program 1 times [2025-02-06 10:05:00,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:05:00,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655525500] [2025-02-06 10:05:00,592 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:05:00,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:05:00,599 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 10:05:00,612 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 10:05:00,612 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:05:00,612 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:00,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:00,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:05:00,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655525500] [2025-02-06 10:05:00,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655525500] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:05:00,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:05:00,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-02-06 10:05:00,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191408844] [2025-02-06 10:05:00,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:05:00,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 10:05:00,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:05:00,795 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 10:05:00,797 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-02-06 10:05:00,798 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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) [2025-02-06 10:05:00,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:05:00,891 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2025-02-06 10:05:00,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 10:05:00,892 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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 [2025-02-06 10:05:00,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:05:00,892 INFO L225 Difference]: With dead ends: 45 [2025-02-06 10:05:00,892 INFO L226 Difference]: Without dead ends: 45 [2025-02-06 10:05:00,893 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-02-06 10:05:00,895 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-06 10:05:00,895 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 96 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-06 10:05:00,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2025-02-06 10:05:00,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2025-02-06 10:05:00,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.236842105263158) internal successors, (47), 41 states have internal predecessors, (47), 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) [2025-02-06 10:05:00,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2025-02-06 10:05:00,902 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 16 [2025-02-06 10:05:00,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:05:00,902 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2025-02-06 10:05:00,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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) [2025-02-06 10:05:00,902 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2025-02-06 10:05:00,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-02-06 10:05:00,902 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:05:00,903 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:05:00,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-02-06 10:05:00,903 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:05:00,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:05:00,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1480051534, now seen corresponding path program 1 times [2025-02-06 10:05:00,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:05:00,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933798973] [2025-02-06 10:05:00,903 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:05:00,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:05:00,911 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 10:05:00,923 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 10:05:00,924 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:05:00,924 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:00,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:00,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:05:00,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933798973] [2025-02-06 10:05:00,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933798973] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:05:00,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:05:00,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 10:05:00,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397863820] [2025-02-06 10:05:00,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:05:00,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 10:05:00,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:05:00,979 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 10:05:00,979 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 10:05:00,979 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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) [2025-02-06 10:05:00,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:05:00,997 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2025-02-06 10:05:00,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 10:05:00,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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 [2025-02-06 10:05:00,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:05:00,998 INFO L225 Difference]: With dead ends: 41 [2025-02-06 10:05:00,998 INFO L226 Difference]: Without dead ends: 28 [2025-02-06 10:05:00,999 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 10:05:00,999 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-06 10:05:01,000 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 36 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-06 10:05:01,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2025-02-06 10:05:01,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2025-02-06 10:05:01,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 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) [2025-02-06 10:05:01,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2025-02-06 10:05:01,003 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 16 [2025-02-06 10:05:01,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:05:01,003 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2025-02-06 10:05:01,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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) [2025-02-06 10:05:01,003 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2025-02-06 10:05:01,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-02-06 10:05:01,003 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:05:01,003 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:05:01,003 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-02-06 10:05:01,003 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:05:01,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:05:01,006 INFO L85 PathProgramCache]: Analyzing trace with hash 948850259, now seen corresponding path program 1 times [2025-02-06 10:05:01,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:05:01,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993277075] [2025-02-06 10:05:01,006 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:05:01,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:05:01,013 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 10:05:01,018 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 10:05:01,018 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:05:01,018 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:01,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:01,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:05:01,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993277075] [2025-02-06 10:05:01,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993277075] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 10:05:01,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 10:05:01,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-06 10:05:01,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135238573] [2025-02-06 10:05:01,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 10:05:01,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-06 10:05:01,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:05:01,220 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-06 10:05:01,220 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-02-06 10:05:01,220 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 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) [2025-02-06 10:05:01,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:05:01,290 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2025-02-06 10:05:01,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 10:05:01,291 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 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 [2025-02-06 10:05:01,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:05:01,291 INFO L225 Difference]: With dead ends: 37 [2025-02-06 10:05:01,291 INFO L226 Difference]: Without dead ends: 31 [2025-02-06 10:05:01,292 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2025-02-06 10:05:01,292 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-06 10:05:01,293 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 59 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-06 10:05:01,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-02-06 10:05:01,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2025-02-06 10:05:01,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 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) [2025-02-06 10:05:01,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2025-02-06 10:05:01,296 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 16 [2025-02-06 10:05:01,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:05:01,296 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2025-02-06 10:05:01,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 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) [2025-02-06 10:05:01,299 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2025-02-06 10:05:01,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-02-06 10:05:01,299 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:05:01,299 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:05:01,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-02-06 10:05:01,299 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:05:01,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:05:01,300 INFO L85 PathProgramCache]: Analyzing trace with hash -553313574, now seen corresponding path program 1 times [2025-02-06 10:05:01,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:05:01,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575579190] [2025-02-06 10:05:01,300 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:05:01,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:05:01,308 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 10:05:01,315 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 10:05:01,315 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:05:01,315 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:01,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:01,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:05:01,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575579190] [2025-02-06 10:05:01,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575579190] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 10:05:01,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310920648] [2025-02-06 10:05:01,491 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 10:05:01,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:05:01,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:05:01,493 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) [2025-02-06 10:05:01,495 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 [2025-02-06 10:05:01,555 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-06 10:05:01,569 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-06 10:05:01,569 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:05:01,569 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:01,570 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-02-06 10:05:01,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:05:01,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:01,696 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 10:05:01,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2025-02-06 10:05:01,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:01,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310920648] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 10:05:01,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 10:05:01,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2025-02-06 10:05:01,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835038792] [2025-02-06 10:05:01,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 10:05:01,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-06 10:05:01,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:05:01,872 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-06 10:05:01,872 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2025-02-06 10:05:01,872 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 17 states, 16 states have (on average 3.0625) internal successors, (49), 17 states have internal predecessors, (49), 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) [2025-02-06 10:05:01,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:05:01,968 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2025-02-06 10:05:01,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 10:05:01,968 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 17 states have internal predecessors, (49), 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 19 [2025-02-06 10:05:01,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:05:01,969 INFO L225 Difference]: With dead ends: 38 [2025-02-06 10:05:01,969 INFO L226 Difference]: Without dead ends: 34 [2025-02-06 10:05:01,969 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2025-02-06 10:05:01,969 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 25 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-06 10:05:01,970 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 111 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-06 10:05:01,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2025-02-06 10:05:01,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2025-02-06 10:05:01,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 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) [2025-02-06 10:05:01,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2025-02-06 10:05:01,971 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 19 [2025-02-06 10:05:01,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:05:01,971 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2025-02-06 10:05:01,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 17 states have internal predecessors, (49), 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) [2025-02-06 10:05:01,973 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2025-02-06 10:05:01,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-02-06 10:05:01,975 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:05:01,975 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:05:01,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-06 10:05:02,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:05:02,179 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:05:02,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:05:02,180 INFO L85 PathProgramCache]: Analyzing trace with hash 505344920, now seen corresponding path program 2 times [2025-02-06 10:05:02,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:05:02,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812696057] [2025-02-06 10:05:02,180 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 10:05:02,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:05:02,191 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-02-06 10:05:02,207 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-06 10:05:02,207 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 10:05:02,207 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:02,670 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:02,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:05:02,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812696057] [2025-02-06 10:05:02,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812696057] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 10:05:02,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423912314] [2025-02-06 10:05:02,671 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 10:05:02,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:05:02,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:05:02,673 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) [2025-02-06 10:05:02,676 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 [2025-02-06 10:05:02,727 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-02-06 10:05:02,747 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-06 10:05:02,747 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 10:05:02,747 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:02,748 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-02-06 10:05:02,752 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:05:02,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-02-06 10:05:02,884 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:02,885 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 10:05:02,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2025-02-06 10:05:02,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-02-06 10:05:02,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:02,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423912314] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 10:05:02,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 10:05:02,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 20 [2025-02-06 10:05:02,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681660393] [2025-02-06 10:05:02,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 10:05:02,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-06 10:05:02,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:05:02,976 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-06 10:05:02,976 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2025-02-06 10:05:02,976 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 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) [2025-02-06 10:05:03,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:05:03,172 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2025-02-06 10:05:03,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-06 10:05:03,173 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 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 26 [2025-02-06 10:05:03,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:05:03,173 INFO L225 Difference]: With dead ends: 45 [2025-02-06 10:05:03,173 INFO L226 Difference]: Without dead ends: 32 [2025-02-06 10:05:03,174 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2025-02-06 10:05:03,174 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 12 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-06 10:05:03,174 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 119 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-06 10:05:03,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-02-06 10:05:03,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2025-02-06 10:05:03,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 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) [2025-02-06 10:05:03,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2025-02-06 10:05:03,176 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 26 [2025-02-06 10:05:03,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:05:03,177 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2025-02-06 10:05:03,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 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) [2025-02-06 10:05:03,177 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2025-02-06 10:05:03,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-02-06 10:05:03,177 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:05:03,178 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:05:03,185 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 [2025-02-06 10:05:03,382 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:05:03,382 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:05:03,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:05:03,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1814102879, now seen corresponding path program 3 times [2025-02-06 10:05:03,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:05:03,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928351849] [2025-02-06 10:05:03,383 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 10:05:03,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:05:03,394 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 3 equivalence classes. [2025-02-06 10:05:03,406 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 29 of 29 statements. [2025-02-06 10:05:03,407 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-06 10:05:03,407 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:03,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:03,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:05:03,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928351849] [2025-02-06 10:05:03,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928351849] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 10:05:03,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607409281] [2025-02-06 10:05:03,666 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 10:05:03,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:05:03,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:05:03,668 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) [2025-02-06 10:05:03,670 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 [2025-02-06 10:05:03,718 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 3 equivalence classes. [2025-02-06 10:05:03,740 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 29 of 29 statements. [2025-02-06 10:05:03,740 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-06 10:05:03,740 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:03,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-02-06 10:05:03,744 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:05:03,864 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:03,865 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 10:05:04,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2025-02-06 10:05:04,059 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:04,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607409281] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 10:05:04,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 10:05:04,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2025-02-06 10:05:04,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969437345] [2025-02-06 10:05:04,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 10:05:04,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-06 10:05:04,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:05:04,061 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-06 10:05:04,061 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2025-02-06 10:05:04,061 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 20 states have internal predecessors, (64), 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) [2025-02-06 10:05:04,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:05:04,200 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2025-02-06 10:05:04,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 10:05:04,201 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 20 states have internal predecessors, (64), 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 29 [2025-02-06 10:05:04,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:05:04,201 INFO L225 Difference]: With dead ends: 42 [2025-02-06 10:05:04,201 INFO L226 Difference]: Without dead ends: 42 [2025-02-06 10:05:04,201 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2025-02-06 10:05:04,202 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-06 10:05:04,202 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 115 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-06 10:05:04,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2025-02-06 10:05:04,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2025-02-06 10:05:04,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 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) [2025-02-06 10:05:04,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2025-02-06 10:05:04,204 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 29 [2025-02-06 10:05:04,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:05:04,204 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2025-02-06 10:05:04,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 20 states have internal predecessors, (64), 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) [2025-02-06 10:05:04,204 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2025-02-06 10:05:04,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-02-06 10:05:04,208 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:05:04,209 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:05:04,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-06 10:05:04,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-02-06 10:05:04,409 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:05:04,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:05:04,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1253418125, now seen corresponding path program 4 times [2025-02-06 10:05:04,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:05:04,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791517567] [2025-02-06 10:05:04,410 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 10:05:04,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:05:04,418 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 36 statements into 2 equivalence classes. [2025-02-06 10:05:04,426 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-02-06 10:05:04,426 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 10:05:04,426 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:04,781 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:04,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:05:04,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791517567] [2025-02-06 10:05:04,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791517567] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 10:05:04,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608417388] [2025-02-06 10:05:04,782 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 10:05:04,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:05:04,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:05:04,784 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) [2025-02-06 10:05:04,786 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 [2025-02-06 10:05:04,833 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 36 statements into 2 equivalence classes. [2025-02-06 10:05:04,857 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-02-06 10:05:04,858 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 10:05:04,858 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:04,859 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-02-06 10:05:04,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:05:04,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-02-06 10:05:05,026 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:05,026 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 10:05:05,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2025-02-06 10:05:05,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-02-06 10:05:05,119 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:05,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608417388] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 10:05:05,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 10:05:05,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 22 [2025-02-06 10:05:05,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436861826] [2025-02-06 10:05:05,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 10:05:05,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-06 10:05:05,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:05:05,121 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-06 10:05:05,121 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2025-02-06 10:05:05,121 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 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) [2025-02-06 10:05:05,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:05:05,315 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2025-02-06 10:05:05,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-06 10:05:05,316 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 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 [2025-02-06 10:05:05,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:05:05,316 INFO L225 Difference]: With dead ends: 62 [2025-02-06 10:05:05,316 INFO L226 Difference]: Without dead ends: 42 [2025-02-06 10:05:05,318 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2025-02-06 10:05:05,318 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-06 10:05:05,319 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 150 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-06 10:05:05,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2025-02-06 10:05:05,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2025-02-06 10:05:05,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 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) [2025-02-06 10:05:05,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2025-02-06 10:05:05,321 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2025-02-06 10:05:05,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:05:05,321 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2025-02-06 10:05:05,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 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) [2025-02-06 10:05:05,321 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2025-02-06 10:05:05,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-02-06 10:05:05,321 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:05:05,321 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:05:05,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-06 10:05:05,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-02-06 10:05:05,522 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:05:05,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:05:05,523 INFO L85 PathProgramCache]: Analyzing trace with hash 218930810, now seen corresponding path program 5 times [2025-02-06 10:05:05,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:05:05,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431028365] [2025-02-06 10:05:05,523 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 10:05:05,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:05:05,532 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 39 statements into 4 equivalence classes. [2025-02-06 10:05:05,547 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 39 of 39 statements. [2025-02-06 10:05:05,548 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-06 10:05:05,548 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:05,793 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:05,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:05:05,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431028365] [2025-02-06 10:05:05,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431028365] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 10:05:05,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535144462] [2025-02-06 10:05:05,794 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 10:05:05,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:05:05,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:05:05,797 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) [2025-02-06 10:05:05,798 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 [2025-02-06 10:05:05,845 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 39 statements into 4 equivalence classes. [2025-02-06 10:05:05,871 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 39 of 39 statements. [2025-02-06 10:05:05,871 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-06 10:05:05,871 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:05,872 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-02-06 10:05:05,875 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:05:05,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 10:05:05,964 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:05,965 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 10:05:06,278 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:06,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535144462] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 10:05:06,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 10:05:06,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2025-02-06 10:05:06,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899995961] [2025-02-06 10:05:06,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 10:05:06,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-06 10:05:06,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:05:06,279 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-06 10:05:06,279 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2025-02-06 10:05:06,279 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 22 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 22 states have internal predecessors, (75), 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) [2025-02-06 10:05:06,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:05:06,452 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2025-02-06 10:05:06,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-06 10:05:06,452 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 22 states have internal predecessors, (75), 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 39 [2025-02-06 10:05:06,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:05:06,453 INFO L225 Difference]: With dead ends: 52 [2025-02-06 10:05:06,453 INFO L226 Difference]: Without dead ends: 52 [2025-02-06 10:05:06,453 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2025-02-06 10:05:06,454 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-06 10:05:06,454 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 198 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-06 10:05:06,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2025-02-06 10:05:06,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2025-02-06 10:05:06,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 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) [2025-02-06 10:05:06,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2025-02-06 10:05:06,457 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 39 [2025-02-06 10:05:06,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:05:06,457 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2025-02-06 10:05:06,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 22 states have internal predecessors, (75), 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) [2025-02-06 10:05:06,457 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2025-02-06 10:05:06,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-02-06 10:05:06,458 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:05:06,458 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:05:06,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-06 10:05:06,663 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,SelfDestructingSolverStorable16 [2025-02-06 10:05:06,663 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:05:06,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:05:06,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1863705608, now seen corresponding path program 6 times [2025-02-06 10:05:06,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:05:06,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572042161] [2025-02-06 10:05:06,664 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 10:05:06,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:05:06,673 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 46 statements into 5 equivalence classes. [2025-02-06 10:05:06,700 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 46 of 46 statements. [2025-02-06 10:05:06,700 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-02-06 10:05:06,700 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:07,124 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 17 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:07,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:05:07,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572042161] [2025-02-06 10:05:07,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572042161] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 10:05:07,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911005577] [2025-02-06 10:05:07,125 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 10:05:07,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:05:07,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:05:07,127 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) [2025-02-06 10:05:07,129 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 [2025-02-06 10:05:07,182 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 46 statements into 5 equivalence classes. [2025-02-06 10:05:07,216 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 46 of 46 statements. [2025-02-06 10:05:07,216 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-02-06 10:05:07,216 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:07,218 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-02-06 10:05:07,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:05:07,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-02-06 10:05:07,444 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 17 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:07,444 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 10:05:07,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2025-02-06 10:05:07,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-02-06 10:05:07,558 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 17 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:07,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911005577] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 10:05:07,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 10:05:07,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 25 [2025-02-06 10:05:07,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71439494] [2025-02-06 10:05:07,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 10:05:07,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-06 10:05:07,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:05:07,559 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-06 10:05:07,560 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2025-02-06 10:05:07,560 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 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) [2025-02-06 10:05:07,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:05:07,835 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2025-02-06 10:05:07,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-06 10:05:07,835 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 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) Word has length 46 [2025-02-06 10:05:07,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:05:07,836 INFO L225 Difference]: With dead ends: 79 [2025-02-06 10:05:07,836 INFO L226 Difference]: Without dead ends: 52 [2025-02-06 10:05:07,836 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2025-02-06 10:05:07,837 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 9 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-06 10:05:07,837 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 257 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-06 10:05:07,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2025-02-06 10:05:07,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2025-02-06 10:05:07,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 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) [2025-02-06 10:05:07,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2025-02-06 10:05:07,842 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 46 [2025-02-06 10:05:07,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:05:07,843 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2025-02-06 10:05:07,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 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) [2025-02-06 10:05:07,843 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2025-02-06 10:05:07,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-02-06 10:05:07,843 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:05:07,843 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:05:07,851 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 [2025-02-06 10:05:08,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:05:08,044 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:05:08,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:05:08,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1959427521, now seen corresponding path program 7 times [2025-02-06 10:05:08,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:05:08,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214525777] [2025-02-06 10:05:08,045 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 10:05:08,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:05:08,054 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-02-06 10:05:08,060 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-02-06 10:05:08,060 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:05:08,060 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:08,501 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 5 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:08,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:05:08,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214525777] [2025-02-06 10:05:08,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214525777] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 10:05:08,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254258041] [2025-02-06 10:05:08,502 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 10:05:08,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:05:08,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:05:08,504 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) [2025-02-06 10:05:08,506 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 [2025-02-06 10:05:08,563 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-02-06 10:05:08,592 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-02-06 10:05:08,592 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:05:08,592 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:08,594 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-02-06 10:05:08,598 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:05:08,832 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:08,832 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 10:05:09,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2025-02-06 10:05:09,184 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:09,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254258041] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 10:05:09,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 10:05:09,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 27 [2025-02-06 10:05:09,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945574231] [2025-02-06 10:05:09,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 10:05:09,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-02-06 10:05:09,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:05:09,186 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-02-06 10:05:09,186 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2025-02-06 10:05:09,186 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 28 states, 27 states have (on average 3.8518518518518516) internal successors, (104), 28 states have internal predecessors, (104), 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) [2025-02-06 10:05:09,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:05:09,449 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2025-02-06 10:05:09,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-06 10:05:09,450 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.8518518518518516) internal successors, (104), 28 states have internal predecessors, (104), 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 49 [2025-02-06 10:05:09,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:05:09,451 INFO L225 Difference]: With dead ends: 62 [2025-02-06 10:05:09,451 INFO L226 Difference]: Without dead ends: 62 [2025-02-06 10:05:09,451 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2025-02-06 10:05:09,452 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-06 10:05:09,452 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 304 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-06 10:05:09,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2025-02-06 10:05:09,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2025-02-06 10:05:09,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 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) [2025-02-06 10:05:09,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2025-02-06 10:05:09,458 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 49 [2025-02-06 10:05:09,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:05:09,458 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2025-02-06 10:05:09,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.8518518518518516) internal successors, (104), 28 states have internal predecessors, (104), 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) [2025-02-06 10:05:09,458 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2025-02-06 10:05:09,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-02-06 10:05:09,459 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:05:09,459 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:05:09,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-06 10:05:09,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:05:09,660 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:05:09,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:05:09,660 INFO L85 PathProgramCache]: Analyzing trace with hash -254582637, now seen corresponding path program 8 times [2025-02-06 10:05:09,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:05:09,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342407433] [2025-02-06 10:05:09,661 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 10:05:09,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:05:09,670 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 56 statements into 2 equivalence classes. [2025-02-06 10:05:09,685 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 56 of 56 statements. [2025-02-06 10:05:09,689 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 10:05:09,690 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:10,115 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 22 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:10,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:05:10,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342407433] [2025-02-06 10:05:10,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342407433] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 10:05:10,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896207209] [2025-02-06 10:05:10,115 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 10:05:10,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:05:10,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:05:10,118 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) [2025-02-06 10:05:10,120 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 [2025-02-06 10:05:10,178 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 56 statements into 2 equivalence classes. [2025-02-06 10:05:10,207 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 56 of 56 statements. [2025-02-06 10:05:10,207 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 10:05:10,208 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:10,209 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 57 conjuncts are in the unsatisfiable core [2025-02-06 10:05:10,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:05:10,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-02-06 10:05:10,310 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 22 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:10,310 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 10:05:10,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2025-02-06 10:05:10,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-02-06 10:05:10,431 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 22 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:10,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896207209] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 10:05:10,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 10:05:10,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 20 [2025-02-06 10:05:10,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32608646] [2025-02-06 10:05:10,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 10:05:10,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-06 10:05:10,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:05:10,432 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-06 10:05:10,433 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2025-02-06 10:05:10,433 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 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) [2025-02-06 10:05:10,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:05:10,738 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2025-02-06 10:05:10,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-06 10:05:10,738 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 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 [2025-02-06 10:05:10,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:05:10,739 INFO L225 Difference]: With dead ends: 96 [2025-02-06 10:05:10,739 INFO L226 Difference]: Without dead ends: 62 [2025-02-06 10:05:10,739 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2025-02-06 10:05:10,740 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-06 10:05:10,740 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 299 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-06 10:05:10,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2025-02-06 10:05:10,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2025-02-06 10:05:10,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 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) [2025-02-06 10:05:10,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2025-02-06 10:05:10,742 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 56 [2025-02-06 10:05:10,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:05:10,742 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2025-02-06 10:05:10,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 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) [2025-02-06 10:05:10,742 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2025-02-06 10:05:10,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2025-02-06 10:05:10,747 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:05:10,747 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:05:10,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-06 10:05:10,947 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:05:10,948 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:05:10,948 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:05:10,948 INFO L85 PathProgramCache]: Analyzing trace with hash 872733210, now seen corresponding path program 9 times [2025-02-06 10:05:10,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:05:10,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901827002] [2025-02-06 10:05:10,948 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 10:05:10,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:05:10,957 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 59 statements into 6 equivalence classes. [2025-02-06 10:05:10,969 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 59 of 59 statements. [2025-02-06 10:05:10,969 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-06 10:05:10,969 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:11,475 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 12 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:11,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:05:11,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901827002] [2025-02-06 10:05:11,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901827002] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 10:05:11,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450972084] [2025-02-06 10:05:11,476 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 10:05:11,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:05:11,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:05:11,478 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) [2025-02-06 10:05:11,481 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 [2025-02-06 10:05:11,542 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 59 statements into 6 equivalence classes. [2025-02-06 10:05:11,584 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 59 of 59 statements. [2025-02-06 10:05:11,584 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-06 10:05:11,584 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:11,586 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-02-06 10:05:11,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:05:11,809 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 22 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:11,809 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 10:05:12,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2025-02-06 10:05:12,228 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 22 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:12,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450972084] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 10:05:12,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 10:05:12,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2025-02-06 10:05:12,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595188623] [2025-02-06 10:05:12,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 10:05:12,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-02-06 10:05:12,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:05:12,230 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-02-06 10:05:12,230 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2025-02-06 10:05:12,230 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 32 states, 31 states have (on average 4.0) internal successors, (124), 32 states have internal predecessors, (124), 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) [2025-02-06 10:05:12,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:05:12,498 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2025-02-06 10:05:12,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-06 10:05:12,498 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.0) internal successors, (124), 32 states have internal predecessors, (124), 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 59 [2025-02-06 10:05:12,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:05:12,499 INFO L225 Difference]: With dead ends: 72 [2025-02-06 10:05:12,499 INFO L226 Difference]: Without dead ends: 72 [2025-02-06 10:05:12,499 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 95 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=214, Invalid=1118, Unknown=0, NotChecked=0, Total=1332 [2025-02-06 10:05:12,500 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 35 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-06 10:05:12,500 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 155 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-06 10:05:12,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2025-02-06 10:05:12,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2025-02-06 10:05:12,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 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) [2025-02-06 10:05:12,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2025-02-06 10:05:12,506 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 59 [2025-02-06 10:05:12,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:05:12,507 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2025-02-06 10:05:12,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.0) internal successors, (124), 32 states have internal predecessors, (124), 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) [2025-02-06 10:05:12,507 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2025-02-06 10:05:12,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2025-02-06 10:05:12,507 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:05:12,507 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:05:12,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-06 10:05:12,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:05:12,708 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:05:12,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:05:12,709 INFO L85 PathProgramCache]: Analyzing trace with hash -184185768, now seen corresponding path program 10 times [2025-02-06 10:05:12,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:05:12,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388891172] [2025-02-06 10:05:12,709 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 10:05:12,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:05:12,718 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 66 statements into 2 equivalence classes. [2025-02-06 10:05:12,728 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 66 of 66 statements. [2025-02-06 10:05:12,728 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 10:05:12,728 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:13,329 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 27 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:13,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:05:13,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388891172] [2025-02-06 10:05:13,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388891172] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 10:05:13,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679096799] [2025-02-06 10:05:13,330 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 10:05:13,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:05:13,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:05:13,332 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) [2025-02-06 10:05:13,334 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 [2025-02-06 10:05:13,401 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 66 statements into 2 equivalence classes. [2025-02-06 10:05:13,447 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 66 of 66 statements. [2025-02-06 10:05:13,448 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 10:05:13,448 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:13,450 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 67 conjuncts are in the unsatisfiable core [2025-02-06 10:05:13,453 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:05:13,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-02-06 10:05:13,749 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 27 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:13,750 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 10:05:13,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2025-02-06 10:05:13,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-02-06 10:05:13,893 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 27 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:13,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679096799] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 10:05:13,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 10:05:13,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 31 [2025-02-06 10:05:13,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403888875] [2025-02-06 10:05:13,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 10:05:13,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-02-06 10:05:13,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:05:13,895 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-02-06 10:05:13,895 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=847, Unknown=0, NotChecked=0, Total=930 [2025-02-06 10:05:13,896 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 31 states have internal predecessors, (96), 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) [2025-02-06 10:05:14,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:05:14,308 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2025-02-06 10:05:14,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-06 10:05:14,309 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 31 states have internal predecessors, (96), 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 66 [2025-02-06 10:05:14,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:05:14,309 INFO L225 Difference]: With dead ends: 113 [2025-02-06 10:05:14,310 INFO L226 Difference]: Without dead ends: 72 [2025-02-06 10:05:14,310 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=1285, Unknown=0, NotChecked=0, Total=1406 [2025-02-06 10:05:14,311 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-06 10:05:14,312 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 454 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-06 10:05:14,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2025-02-06 10:05:14,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2025-02-06 10:05:14,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 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) [2025-02-06 10:05:14,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2025-02-06 10:05:14,314 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 66 [2025-02-06 10:05:14,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:05:14,314 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2025-02-06 10:05:14,314 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 31 states have internal predecessors, (96), 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) [2025-02-06 10:05:14,314 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2025-02-06 10:05:14,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2025-02-06 10:05:14,315 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:05:14,315 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:05:14,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-06 10:05:14,515 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,SelfDestructingSolverStorable21 [2025-02-06 10:05:14,516 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:05:14,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:05:14,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1275988255, now seen corresponding path program 11 times [2025-02-06 10:05:14,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:05:14,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252880869] [2025-02-06 10:05:14,516 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 10:05:14,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:05:14,526 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 69 statements into 7 equivalence classes. [2025-02-06 10:05:14,545 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 69 of 69 statements. [2025-02-06 10:05:14,545 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-02-06 10:05:14,545 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:14,976 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 35 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:14,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:05:14,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252880869] [2025-02-06 10:05:14,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252880869] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 10:05:14,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814129965] [2025-02-06 10:05:14,976 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 10:05:14,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:05:14,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:05:14,979 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) [2025-02-06 10:05:14,982 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 [2025-02-06 10:05:15,049 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 69 statements into 7 equivalence classes. [2025-02-06 10:05:15,092 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 69 of 69 statements. [2025-02-06 10:05:15,093 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-02-06 10:05:15,093 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:15,095 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 70 conjuncts are in the unsatisfiable core [2025-02-06 10:05:15,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:05:15,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 10:05:15,465 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 35 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:15,465 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 10:05:16,163 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 35 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:16,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814129965] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 10:05:16,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 10:05:16,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 40 [2025-02-06 10:05:16,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729681999] [2025-02-06 10:05:16,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 10:05:16,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-02-06 10:05:16,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:05:16,167 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-02-06 10:05:16,168 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1425, Unknown=0, NotChecked=0, Total=1640 [2025-02-06 10:05:16,168 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 41 states, 40 states have (on average 4.05) internal successors, (162), 41 states have internal predecessors, (162), 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) [2025-02-06 10:05:16,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:05:16,441 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2025-02-06 10:05:16,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-06 10:05:16,442 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 4.05) internal successors, (162), 41 states have internal predecessors, (162), 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 69 [2025-02-06 10:05:16,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:05:16,442 INFO L225 Difference]: With dead ends: 82 [2025-02-06 10:05:16,442 INFO L226 Difference]: Without dead ends: 82 [2025-02-06 10:05:16,443 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=238, Invalid=1484, Unknown=0, NotChecked=0, Total=1722 [2025-02-06 10:05:16,443 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 18 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-06 10:05:16,444 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 465 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-06 10:05:16,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-02-06 10:05:16,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2025-02-06 10:05:16,445 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) [2025-02-06 10:05:16,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2025-02-06 10:05:16,446 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 69 [2025-02-06 10:05:16,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:05:16,446 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2025-02-06 10:05:16,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 4.05) internal successors, (162), 41 states have internal predecessors, (162), 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) [2025-02-06 10:05:16,446 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2025-02-06 10:05:16,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2025-02-06 10:05:16,446 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:05:16,447 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:05:16,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-06 10:05:16,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:05:16,647 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:05:16,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:05:16,648 INFO L85 PathProgramCache]: Analyzing trace with hash -813736525, now seen corresponding path program 12 times [2025-02-06 10:05:16,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:05:16,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436791072] [2025-02-06 10:05:16,648 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 10:05:16,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:05:16,659 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 76 statements into 8 equivalence classes. [2025-02-06 10:05:16,686 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) and asserted 76 of 76 statements. [2025-02-06 10:05:16,686 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2025-02-06 10:05:16,686 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:17,312 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 32 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:17,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:05:17,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436791072] [2025-02-06 10:05:17,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436791072] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 10:05:17,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670117591] [2025-02-06 10:05:17,313 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 10:05:17,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:05:17,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:05:17,315 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) [2025-02-06 10:05:17,316 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 [2025-02-06 10:05:17,380 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 76 statements into 8 equivalence classes. [2025-02-06 10:05:17,425 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) and asserted 76 of 76 statements. [2025-02-06 10:05:17,426 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2025-02-06 10:05:17,426 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:17,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 79 conjuncts are in the unsatisfiable core [2025-02-06 10:05:17,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:05:17,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-02-06 10:05:17,734 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 32 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:17,735 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 10:05:17,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2025-02-06 10:05:17,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-02-06 10:05:17,877 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 32 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:17,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670117591] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 10:05:17,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 10:05:17,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 34 [2025-02-06 10:05:17,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185546014] [2025-02-06 10:05:17,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 10:05:17,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-02-06 10:05:17,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:05:17,878 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-02-06 10:05:17,879 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1032, Unknown=0, NotChecked=0, Total=1122 [2025-02-06 10:05:17,879 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 34 states, 34 states have (on average 3.2058823529411766) internal successors, (109), 34 states have internal predecessors, (109), 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) [2025-02-06 10:05:18,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:05:18,355 INFO L93 Difference]: Finished difference Result 130 states and 131 transitions. [2025-02-06 10:05:18,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-02-06 10:05:18,356 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.2058823529411766) internal successors, (109), 34 states have internal predecessors, (109), 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 [2025-02-06 10:05:18,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:05:18,357 INFO L225 Difference]: With dead ends: 130 [2025-02-06 10:05:18,357 INFO L226 Difference]: Without dead ends: 82 [2025-02-06 10:05:18,357 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=1589, Unknown=0, NotChecked=0, Total=1722 [2025-02-06 10:05:18,358 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 14 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-06 10:05:18,358 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 637 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-06 10:05:18,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-02-06 10:05:18,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2025-02-06 10:05:18,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 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) [2025-02-06 10:05:18,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2025-02-06 10:05:18,366 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 76 [2025-02-06 10:05:18,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:05:18,366 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2025-02-06 10:05:18,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.2058823529411766) internal successors, (109), 34 states have internal predecessors, (109), 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) [2025-02-06 10:05:18,366 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2025-02-06 10:05:18,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2025-02-06 10:05:18,367 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:05:18,367 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:05:18,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-06 10:05:18,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:05:18,568 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:05:18,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:05:18,568 INFO L85 PathProgramCache]: Analyzing trace with hash -2132554310, now seen corresponding path program 13 times [2025-02-06 10:05:18,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:05:18,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459490817] [2025-02-06 10:05:18,568 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 10:05:18,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:05:18,578 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 79 statements into 1 equivalence classes. [2025-02-06 10:05:18,587 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 79 of 79 statements. [2025-02-06 10:05:18,587 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:05:18,587 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:19,233 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 35 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:19,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:05:19,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459490817] [2025-02-06 10:05:19,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459490817] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 10:05:19,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766730439] [2025-02-06 10:05:19,233 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 10:05:19,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:05:19,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:05:19,238 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) [2025-02-06 10:05:19,240 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 [2025-02-06 10:05:19,321 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 79 statements into 1 equivalence classes. [2025-02-06 10:05:19,355 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 79 of 79 statements. [2025-02-06 10:05:19,355 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:05:19,355 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:19,357 INFO L256 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 75 conjuncts are in the unsatisfiable core [2025-02-06 10:05:19,360 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:05:19,699 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 51 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:19,699 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 10:05:20,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2025-02-06 10:05:20,139 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 51 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:20,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766730439] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 10:05:20,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 10:05:20,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 39 [2025-02-06 10:05:20,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925712629] [2025-02-06 10:05:20,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 10:05:20,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-02-06 10:05:20,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:05:20,140 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-02-06 10:05:20,141 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1363, Unknown=0, NotChecked=0, Total=1560 [2025-02-06 10:05:20,141 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 40 states, 39 states have (on average 4.205128205128205) internal successors, (164), 40 states have internal predecessors, (164), 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) [2025-02-06 10:05:20,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:05:20,526 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2025-02-06 10:05:20,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-06 10:05:20,526 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 4.205128205128205) internal successors, (164), 40 states have internal predecessors, (164), 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 79 [2025-02-06 10:05:20,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:05:20,527 INFO L225 Difference]: With dead ends: 92 [2025-02-06 10:05:20,527 INFO L226 Difference]: Without dead ends: 92 [2025-02-06 10:05:20,527 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 128 SyntacticMatches, 8 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=214, Invalid=1426, Unknown=0, NotChecked=0, Total=1640 [2025-02-06 10:05:20,527 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 13 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-06 10:05:20,528 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 740 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1027 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-06 10:05:20,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2025-02-06 10:05:20,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2025-02-06 10:05:20,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 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) [2025-02-06 10:05:20,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2025-02-06 10:05:20,530 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 79 [2025-02-06 10:05:20,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:05:20,530 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2025-02-06 10:05:20,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 4.205128205128205) internal successors, (164), 40 states have internal predecessors, (164), 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) [2025-02-06 10:05:20,531 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2025-02-06 10:05:20,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2025-02-06 10:05:20,531 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:05:20,531 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:05:20,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-02-06 10:05:20,733 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,SelfDestructingSolverStorable24 [2025-02-06 10:05:20,734 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:05:20,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:05:20,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1128577864, now seen corresponding path program 14 times [2025-02-06 10:05:20,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:05:20,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651526497] [2025-02-06 10:05:20,735 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 10:05:20,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:05:20,746 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 86 statements into 2 equivalence classes. [2025-02-06 10:05:20,760 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 86 of 86 statements. [2025-02-06 10:05:20,761 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 10:05:20,761 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:21,467 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 37 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:21,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:05:21,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651526497] [2025-02-06 10:05:21,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651526497] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 10:05:21,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340345522] [2025-02-06 10:05:21,468 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 10:05:21,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:05:21,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:05:21,471 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) [2025-02-06 10:05:21,473 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 [2025-02-06 10:05:21,549 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 86 statements into 2 equivalence classes. [2025-02-06 10:05:21,585 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 86 of 86 statements. [2025-02-06 10:05:21,585 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 10:05:21,585 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:21,587 INFO L256 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 89 conjuncts are in the unsatisfiable core [2025-02-06 10:05:21,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:05:21,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-02-06 10:05:21,871 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 37 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:21,871 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 10:05:21,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2025-02-06 10:05:21,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-02-06 10:05:22,025 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 37 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:22,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340345522] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 10:05:22,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 10:05:22,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 37 [2025-02-06 10:05:22,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792738493] [2025-02-06 10:05:22,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 10:05:22,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-02-06 10:05:22,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:05:22,026 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-02-06 10:05:22,026 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1235, Unknown=0, NotChecked=0, Total=1332 [2025-02-06 10:05:22,027 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 37 states, 37 states have (on average 3.2972972972972974) internal successors, (122), 37 states have internal predecessors, (122), 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) [2025-02-06 10:05:22,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:05:22,707 INFO L93 Difference]: Finished difference Result 147 states and 148 transitions. [2025-02-06 10:05:22,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-02-06 10:05:22,707 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.2972972972972974) internal successors, (122), 37 states have internal predecessors, (122), 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 86 [2025-02-06 10:05:22,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:05:22,708 INFO L225 Difference]: With dead ends: 147 [2025-02-06 10:05:22,708 INFO L226 Difference]: Without dead ends: 92 [2025-02-06 10:05:22,709 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=145, Invalid=1925, Unknown=0, NotChecked=0, Total=2070 [2025-02-06 10:05:22,709 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 15 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 1386 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-06 10:05:22,709 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 853 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1386 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-06 10:05:22,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2025-02-06 10:05:22,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2025-02-06 10:05:22,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 states have internal predecessors, (91), 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) [2025-02-06 10:05:22,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2025-02-06 10:05:22,712 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 86 [2025-02-06 10:05:22,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:05:22,712 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2025-02-06 10:05:22,712 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.2972972972972974) internal successors, (122), 37 states have internal predecessors, (122), 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) [2025-02-06 10:05:22,712 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2025-02-06 10:05:22,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2025-02-06 10:05:22,713 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:05:22,713 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:05:22,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-06 10:05:22,913 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,SelfDestructingSolverStorable25 [2025-02-06 10:05:22,913 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:05:22,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:05:22,914 INFO L85 PathProgramCache]: Analyzing trace with hash 563386367, now seen corresponding path program 15 times [2025-02-06 10:05:22,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:05:22,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478771343] [2025-02-06 10:05:22,914 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 10:05:22,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:05:22,927 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 89 statements into 9 equivalence classes. [2025-02-06 10:05:22,942 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 89 of 89 statements. [2025-02-06 10:05:22,943 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-02-06 10:05:22,943 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:23,715 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 51 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:23,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:05:23,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478771343] [2025-02-06 10:05:23,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478771343] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 10:05:23,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144913374] [2025-02-06 10:05:23,716 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 10:05:23,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:05:23,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:05:23,718 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) [2025-02-06 10:05:23,720 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 [2025-02-06 10:05:23,801 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 89 statements into 9 equivalence classes. [2025-02-06 10:05:23,897 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 89 of 89 statements. [2025-02-06 10:05:23,897 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-02-06 10:05:23,897 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:23,900 INFO L256 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 70 conjuncts are in the unsatisfiable core [2025-02-06 10:05:23,904 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:05:24,167 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 70 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:24,167 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 10:05:24,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2025-02-06 10:05:24,664 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 70 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:24,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144913374] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 10:05:24,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 10:05:24,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 43 [2025-02-06 10:05:24,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319867908] [2025-02-06 10:05:24,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 10:05:24,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-02-06 10:05:24,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:05:24,666 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-02-06 10:05:24,666 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1600, Unknown=0, NotChecked=0, Total=1892 [2025-02-06 10:05:24,666 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 44 states, 43 states have (on average 4.27906976744186) internal successors, (184), 44 states have internal predecessors, (184), 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) [2025-02-06 10:05:24,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:05:24,985 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2025-02-06 10:05:24,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-02-06 10:05:24,986 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 4.27906976744186) internal successors, (184), 44 states have internal predecessors, (184), 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 89 [2025-02-06 10:05:24,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:05:24,987 INFO L225 Difference]: With dead ends: 102 [2025-02-06 10:05:24,987 INFO L226 Difference]: Without dead ends: 102 [2025-02-06 10:05:24,987 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 146 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=430, Invalid=2222, Unknown=0, NotChecked=0, Total=2652 [2025-02-06 10:05:24,988 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 60 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-06 10:05:24,988 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 192 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-06 10:05:24,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2025-02-06 10:05:24,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 97. [2025-02-06 10:05:24,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 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) [2025-02-06 10:05:24,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2025-02-06 10:05:24,990 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 89 [2025-02-06 10:05:24,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:05:24,990 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2025-02-06 10:05:24,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 4.27906976744186) internal successors, (184), 44 states have internal predecessors, (184), 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) [2025-02-06 10:05:24,990 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2025-02-06 10:05:24,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2025-02-06 10:05:24,991 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:05:24,991 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:05:24,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-02-06 10:05:25,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:05:25,191 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:05:25,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:05:25,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1557900589, now seen corresponding path program 16 times [2025-02-06 10:05:25,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:05:25,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025040234] [2025-02-06 10:05:25,192 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 10:05:25,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:05:25,200 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 96 statements into 2 equivalence classes. [2025-02-06 10:05:25,211 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 96 of 96 statements. [2025-02-06 10:05:25,211 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 10:05:25,211 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:25,942 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 42 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:25,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:05:25,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025040234] [2025-02-06 10:05:25,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025040234] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 10:05:25,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334860651] [2025-02-06 10:05:25,943 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 10:05:25,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:05:25,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:05:25,945 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) [2025-02-06 10:05:25,949 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 [2025-02-06 10:05:26,044 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 96 statements into 2 equivalence classes. [2025-02-06 10:05:26,121 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 96 of 96 statements. [2025-02-06 10:05:26,121 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 10:05:26,122 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:26,126 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 97 conjuncts are in the unsatisfiable core [2025-02-06 10:05:26,129 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:05:26,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-02-06 10:05:26,242 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 42 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:26,242 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 10:05:26,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2025-02-06 10:05:26,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-02-06 10:05:26,374 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 42 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:26,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334860651] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 10:05:26,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 10:05:26,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 28 [2025-02-06 10:05:26,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748490276] [2025-02-06 10:05:26,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 10:05:26,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-02-06 10:05:26,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:05:26,375 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-02-06 10:05:26,376 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2025-02-06 10:05:26,376 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 28 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 28 states have internal predecessors, (103), 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) [2025-02-06 10:05:26,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:05:26,887 INFO L93 Difference]: Finished difference Result 164 states and 165 transitions. [2025-02-06 10:05:26,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-02-06 10:05:26,888 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 28 states have internal predecessors, (103), 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 96 [2025-02-06 10:05:26,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:05:26,888 INFO L225 Difference]: With dead ends: 164 [2025-02-06 10:05:26,888 INFO L226 Difference]: Without dead ends: 102 [2025-02-06 10:05:26,888 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=1231, Unknown=0, NotChecked=0, Total=1332 [2025-02-06 10:05:26,889 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-06 10:05:26,889 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 815 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1298 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-06 10:05:26,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2025-02-06 10:05:26,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2025-02-06 10:05:26,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 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) [2025-02-06 10:05:26,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2025-02-06 10:05:26,891 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 96 [2025-02-06 10:05:26,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:05:26,891 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2025-02-06 10:05:26,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 28 states have internal predecessors, (103), 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) [2025-02-06 10:05:26,891 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2025-02-06 10:05:26,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2025-02-06 10:05:26,892 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:05:26,892 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:05:26,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-02-06 10:05:27,092 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,SelfDestructingSolverStorable27 [2025-02-06 10:05:27,092 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:05:27,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:05:27,093 INFO L85 PathProgramCache]: Analyzing trace with hash -31491750, now seen corresponding path program 17 times [2025-02-06 10:05:27,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:05:27,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390160545] [2025-02-06 10:05:27,093 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 10:05:27,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:05:27,103 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 99 statements into 10 equivalence classes. [2025-02-06 10:05:27,119 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 99 of 99 statements. [2025-02-06 10:05:27,119 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-02-06 10:05:27,119 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:27,738 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 92 proven. 295 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:27,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:05:27,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390160545] [2025-02-06 10:05:27,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390160545] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 10:05:27,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837173452] [2025-02-06 10:05:27,739 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 10:05:27,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:05:27,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:05:27,741 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) [2025-02-06 10:05:27,743 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 [2025-02-06 10:05:27,839 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 99 statements into 10 equivalence classes. [2025-02-06 10:05:27,901 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 99 of 99 statements. [2025-02-06 10:05:27,901 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-02-06 10:05:27,901 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:27,904 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 97 conjuncts are in the unsatisfiable core [2025-02-06 10:05:27,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:05:27,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 10:05:28,453 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 92 proven. 295 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:28,453 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 10:05:29,273 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 92 proven. 295 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:29,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837173452] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 10:05:29,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 10:05:29,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 55 [2025-02-06 10:05:29,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768176073] [2025-02-06 10:05:29,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 10:05:29,275 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2025-02-06 10:05:29,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:05:29,275 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2025-02-06 10:05:29,276 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=2691, Unknown=0, NotChecked=0, Total=3080 [2025-02-06 10:05:29,277 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 56 states, 55 states have (on average 4.2) internal successors, (231), 56 states have internal predecessors, (231), 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) [2025-02-06 10:05:29,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:05:29,768 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2025-02-06 10:05:29,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-02-06 10:05:29,769 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 4.2) internal successors, (231), 56 states have internal predecessors, (231), 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 99 [2025-02-06 10:05:29,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:05:29,769 INFO L225 Difference]: With dead ends: 112 [2025-02-06 10:05:29,769 INFO L226 Difference]: Without dead ends: 112 [2025-02-06 10:05:29,771 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=421, Invalid=2771, Unknown=0, NotChecked=0, Total=3192 [2025-02-06 10:05:29,772 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 16 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 1352 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 1353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-06 10:05:29,772 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 983 Invalid, 1353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1352 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-06 10:05:29,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2025-02-06 10:05:29,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2025-02-06 10:05:29,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 states have internal predecessors, (108), 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) [2025-02-06 10:05:29,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2025-02-06 10:05:29,774 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 99 [2025-02-06 10:05:29,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:05:29,774 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2025-02-06 10:05:29,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 4.2) internal successors, (231), 56 states have internal predecessors, (231), 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) [2025-02-06 10:05:29,779 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2025-02-06 10:05:29,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2025-02-06 10:05:29,779 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:05:29,783 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:05:29,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-02-06 10:05:29,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-02-06 10:05:29,984 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:05:29,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:05:29,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1289045272, now seen corresponding path program 18 times [2025-02-06 10:05:29,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:05:29,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737069785] [2025-02-06 10:05:29,984 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 10:05:29,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:05:29,998 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 106 statements into 11 equivalence classes. [2025-02-06 10:05:30,050 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 106 of 106 statements. [2025-02-06 10:05:30,052 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-02-06 10:05:30,052 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:31,251 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 70 proven. 382 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:31,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:05:31,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737069785] [2025-02-06 10:05:31,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737069785] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 10:05:31,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946408686] [2025-02-06 10:05:31,252 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 10:05:31,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:05:31,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:05:31,255 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) [2025-02-06 10:05:31,255 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 [2025-02-06 10:05:31,348 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 106 statements into 11 equivalence classes. [2025-02-06 10:05:31,477 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 106 of 106 statements. [2025-02-06 10:05:31,477 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-02-06 10:05:31,477 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:31,479 INFO L256 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 90 conjuncts are in the unsatisfiable core [2025-02-06 10:05:31,483 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:05:31,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 10:05:31,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2025-02-06 10:05:32,831 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 10:05:32,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2025-02-06 10:05:32,947 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 92 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:32,948 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 10:05:34,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2025-02-06 10:05:34,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2025-02-06 10:05:34,555 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 92 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:34,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946408686] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 10:05:34,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 10:05:34,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 74 [2025-02-06 10:05:34,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611450197] [2025-02-06 10:05:34,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 10:05:34,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2025-02-06 10:05:34,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:05:34,556 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2025-02-06 10:05:34,557 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=4839, Unknown=0, NotChecked=0, Total=5550 [2025-02-06 10:05:34,558 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 75 states, 74 states have (on average 4.148648648648648) internal successors, (307), 75 states have internal predecessors, (307), 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) [2025-02-06 10:05:45,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:05:45,530 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2025-02-06 10:05:45,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-02-06 10:05:45,530 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 4.148648648648648) internal successors, (307), 75 states have internal predecessors, (307), 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 106 [2025-02-06 10:05:45,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:05:45,531 INFO L225 Difference]: With dead ends: 119 [2025-02-06 10:05:45,531 INFO L226 Difference]: Without dead ends: 119 [2025-02-06 10:05:45,533 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3287 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=1117, Invalid=6714, Unknown=1, NotChecked=0, Total=7832 [2025-02-06 10:05:45,533 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 105 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-02-06 10:05:45,534 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 219 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 829 Invalid, 1 Unknown, 0 Unchecked, 0.7s Time] [2025-02-06 10:05:45,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2025-02-06 10:05:45,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 114. [2025-02-06 10:05:45,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 113 states have internal predecessors, (115), 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) [2025-02-06 10:05:45,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2025-02-06 10:05:45,536 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 106 [2025-02-06 10:05:45,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:05:45,536 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2025-02-06 10:05:45,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 4.148648648648648) internal successors, (307), 75 states have internal predecessors, (307), 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) [2025-02-06 10:05:45,537 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2025-02-06 10:05:45,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2025-02-06 10:05:45,537 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:05:45,538 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:05:45,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-02-06 10:05:45,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:05:45,738 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:05:45,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:05:45,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1607178342, now seen corresponding path program 19 times [2025-02-06 10:05:45,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:05:45,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266127437] [2025-02-06 10:05:45,739 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 10:05:45,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:05:45,750 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 113 statements into 1 equivalence classes. [2025-02-06 10:05:45,770 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 113 of 113 statements. [2025-02-06 10:05:45,771 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:05:45,771 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:47,213 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 0 proven. 524 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:47,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:05:47,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266127437] [2025-02-06 10:05:47,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266127437] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 10:05:47,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388725068] [2025-02-06 10:05:47,213 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 10:05:47,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:05:47,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:05:47,215 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) [2025-02-06 10:05:47,216 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 [2025-02-06 10:05:47,314 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 113 statements into 1 equivalence classes. [2025-02-06 10:05:47,354 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 113 of 113 statements. [2025-02-06 10:05:47,354 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:05:47,354 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:47,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 109 conjuncts are in the unsatisfiable core [2025-02-06 10:05:47,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:05:47,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-02-06 10:05:48,429 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 114 proven. 405 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 10:05:48,429 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 10:05:48,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2025-02-06 10:05:48,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-02-06 10:05:48,648 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 114 proven. 405 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-06 10:05:48,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388725068] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 10:05:48,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 10:05:48,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 55 [2025-02-06 10:05:48,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600265109] [2025-02-06 10:05:48,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 10:05:48,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2025-02-06 10:05:48,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:05:48,649 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2025-02-06 10:05:48,650 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=2851, Unknown=0, NotChecked=0, Total=2970 [2025-02-06 10:05:48,650 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 55 states, 55 states have (on average 4.054545454545455) internal successors, (223), 55 states have internal predecessors, (223), 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) [2025-02-06 10:05:51,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:05:51,741 INFO L93 Difference]: Finished difference Result 188 states and 189 transitions. [2025-02-06 10:05:51,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-02-06 10:05:51,741 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 4.054545454545455) internal successors, (223), 55 states have internal predecessors, (223), 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 113 [2025-02-06 10:05:51,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:05:51,742 INFO L225 Difference]: With dead ends: 188 [2025-02-06 10:05:51,742 INFO L226 Difference]: Without dead ends: 119 [2025-02-06 10:05:51,743 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=374, Invalid=7108, Unknown=0, NotChecked=0, Total=7482 [2025-02-06 10:05:51,744 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 32 mSDsluCounter, 1888 mSDsCounter, 0 mSdLazyCounter, 2959 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1930 SdHoareTripleChecker+Invalid, 2986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-02-06 10:05:51,744 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 1930 Invalid, 2986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2959 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-02-06 10:05:51,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2025-02-06 10:05:51,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2025-02-06 10:05:51,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 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) [2025-02-06 10:05:51,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2025-02-06 10:05:51,747 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 113 [2025-02-06 10:05:51,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:05:51,747 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2025-02-06 10:05:51,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 4.054545454545455) internal successors, (223), 55 states have internal predecessors, (223), 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) [2025-02-06 10:05:51,747 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2025-02-06 10:05:51,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2025-02-06 10:05:51,748 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:05:51,748 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:05:51,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-02-06 10:05:51,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:05:51,953 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:05:51,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:05:51,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1961345037, now seen corresponding path program 20 times [2025-02-06 10:05:51,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:05:51,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85702490] [2025-02-06 10:05:51,954 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 10:05:51,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:05:51,965 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 116 statements into 2 equivalence classes. [2025-02-06 10:05:51,979 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 116 of 116 statements. [2025-02-06 10:05:51,980 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 10:05:51,980 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:52,943 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 52 proven. 500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:52,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:05:52,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85702490] [2025-02-06 10:05:52,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85702490] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 10:05:52,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396280227] [2025-02-06 10:05:52,944 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 10:05:52,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:05:52,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:05:52,946 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) [2025-02-06 10:05:52,948 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 [2025-02-06 10:05:53,055 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 116 statements into 2 equivalence classes. [2025-02-06 10:05:53,109 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 116 of 116 statements. [2025-02-06 10:05:53,109 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 10:05:53,109 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:53,115 INFO L256 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 119 conjuncts are in the unsatisfiable core [2025-02-06 10:05:53,119 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:05:53,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-02-06 10:05:53,641 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 52 proven. 500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:53,641 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 10:05:53,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2025-02-06 10:05:53,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-02-06 10:05:53,882 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 52 proven. 500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:53,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396280227] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 10:05:53,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 10:05:53,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 46 [2025-02-06 10:05:53,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379640831] [2025-02-06 10:05:53,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 10:05:53,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2025-02-06 10:05:53,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:05:53,884 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2025-02-06 10:05:53,884 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1952, Unknown=0, NotChecked=0, Total=2070 [2025-02-06 10:05:53,885 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 46 states, 46 states have (on average 3.5) internal successors, (161), 46 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) [2025-02-06 10:05:55,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:05:55,137 INFO L93 Difference]: Finished difference Result 198 states and 199 transitions. [2025-02-06 10:05:55,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-02-06 10:05:55,138 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.5) internal successors, (161), 46 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 116 [2025-02-06 10:05:55,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:05:55,138 INFO L225 Difference]: With dead ends: 198 [2025-02-06 10:05:55,139 INFO L226 Difference]: Without dead ends: 122 [2025-02-06 10:05:55,139 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=181, Invalid=3125, Unknown=0, NotChecked=0, Total=3306 [2025-02-06 10:05:55,139 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 16 mSDsluCounter, 1608 mSDsCounter, 0 mSdLazyCounter, 2607 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1654 SdHoareTripleChecker+Invalid, 2617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2025-02-06 10:05:55,139 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 1654 Invalid, 2617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2607 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2025-02-06 10:05:55,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2025-02-06 10:05:55,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2025-02-06 10:05:55,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 119 states have internal predecessors, (121), 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) [2025-02-06 10:05:55,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2025-02-06 10:05:55,143 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 116 [2025-02-06 10:05:55,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:05:55,144 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2025-02-06 10:05:55,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.5) internal successors, (161), 46 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) [2025-02-06 10:05:55,144 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2025-02-06 10:05:55,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2025-02-06 10:05:55,145 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:05:55,145 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:05:55,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-02-06 10:05:55,345 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,SelfDestructingSolverStorable31 [2025-02-06 10:05:55,346 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:05:55,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:05:55,346 INFO L85 PathProgramCache]: Analyzing trace with hash -206709510, now seen corresponding path program 21 times [2025-02-06 10:05:55,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:05:55,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435793870] [2025-02-06 10:05:55,346 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 10:05:55,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:05:55,357 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 119 statements into 12 equivalence classes. [2025-02-06 10:05:55,378 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) and asserted 119 of 119 statements. [2025-02-06 10:05:55,379 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2025-02-06 10:05:55,379 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:56,412 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 117 proven. 466 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:56,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:05:56,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435793870] [2025-02-06 10:05:56,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435793870] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 10:05:56,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676982071] [2025-02-06 10:05:56,412 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 10:05:56,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:05:56,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:05:56,414 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) [2025-02-06 10:05:56,415 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 [2025-02-06 10:05:56,520 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 119 statements into 12 equivalence classes. [2025-02-06 10:05:56,636 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) and asserted 119 of 119 statements. [2025-02-06 10:05:56,636 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2025-02-06 10:05:56,636 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:56,639 INFO L256 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 91 conjuncts are in the unsatisfiable core [2025-02-06 10:05:56,642 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:05:57,013 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 145 proven. 438 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:57,013 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 10:05:57,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2025-02-06 10:05:57,742 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 145 proven. 438 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:57,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676982071] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 10:05:57,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 10:05:57,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 56 [2025-02-06 10:05:57,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744530089] [2025-02-06 10:05:57,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 10:05:57,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-02-06 10:05:57,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:05:57,744 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-02-06 10:05:57,744 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=2679, Unknown=0, NotChecked=0, Total=3192 [2025-02-06 10:05:57,744 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 57 states, 56 states have (on average 4.482142857142857) internal successors, (251), 57 states have internal predecessors, (251), 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) [2025-02-06 10:05:58,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:05:58,152 INFO L93 Difference]: Finished difference Result 132 states and 133 transitions. [2025-02-06 10:05:58,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-02-06 10:05:58,152 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 4.482142857142857) internal successors, (251), 57 states have internal predecessors, (251), 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 119 [2025-02-06 10:05:58,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:05:58,153 INFO L225 Difference]: With dead ends: 132 [2025-02-06 10:05:58,153 INFO L226 Difference]: Without dead ends: 132 [2025-02-06 10:05:58,153 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 196 SyntacticMatches, 12 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2356 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=727, Invalid=3695, Unknown=0, NotChecked=0, Total=4422 [2025-02-06 10:05:58,154 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 124 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-06 10:05:58,154 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 210 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-06 10:05:58,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2025-02-06 10:05:58,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 127. [2025-02-06 10:05:58,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 126 states have internal predecessors, (128), 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) [2025-02-06 10:05:58,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2025-02-06 10:05:58,156 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 119 [2025-02-06 10:05:58,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:05:58,156 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2025-02-06 10:05:58,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 4.482142857142857) internal successors, (251), 57 states have internal predecessors, (251), 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) [2025-02-06 10:05:58,157 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2025-02-06 10:05:58,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2025-02-06 10:05:58,157 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:05:58,157 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:05:58,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-02-06 10:05:58,358 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,SelfDestructingSolverStorable32 [2025-02-06 10:05:58,358 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:05:58,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:05:58,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1667396232, now seen corresponding path program 22 times [2025-02-06 10:05:58,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:05:58,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139189241] [2025-02-06 10:05:58,359 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 10:05:58,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:05:58,372 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 126 statements into 2 equivalence classes. [2025-02-06 10:05:58,390 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 126 of 126 statements. [2025-02-06 10:05:58,391 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 10:05:58,391 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:59,547 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 57 proven. 605 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:05:59,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:05:59,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139189241] [2025-02-06 10:05:59,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139189241] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 10:05:59,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970831288] [2025-02-06 10:05:59,548 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 10:05:59,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:05:59,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:05:59,550 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) [2025-02-06 10:05:59,555 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 [2025-02-06 10:05:59,666 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 126 statements into 2 equivalence classes. [2025-02-06 10:05:59,792 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 126 of 126 statements. [2025-02-06 10:05:59,792 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 10:05:59,792 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:05:59,795 INFO L256 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 127 conjuncts are in the unsatisfiable core [2025-02-06 10:05:59,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:06:00,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-02-06 10:06:00,372 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 57 proven. 605 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:06:00,372 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 10:06:00,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2025-02-06 10:06:00,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-02-06 10:06:00,600 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 57 proven. 605 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:06:00,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970831288] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 10:06:00,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 10:06:00,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 49 [2025-02-06 10:06:00,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402567335] [2025-02-06 10:06:00,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 10:06:00,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-02-06 10:06:00,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:06:00,601 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-02-06 10:06:00,601 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=2248, Unknown=0, NotChecked=0, Total=2352 [2025-02-06 10:06:00,601 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand has 49 states, 49 states have (on average 3.4489795918367347) internal successors, (169), 49 states have internal predecessors, (169), 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) [2025-02-06 10:06:02,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:06:02,388 INFO L93 Difference]: Finished difference Result 215 states and 216 transitions. [2025-02-06 10:06:02,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2025-02-06 10:06:02,388 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.4489795918367347) internal successors, (169), 49 states have internal predecessors, (169), 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 126 [2025-02-06 10:06:02,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:06:02,389 INFO L225 Difference]: With dead ends: 215 [2025-02-06 10:06:02,389 INFO L226 Difference]: Without dead ends: 132 [2025-02-06 10:06:02,390 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=247, Invalid=5605, Unknown=0, NotChecked=0, Total=5852 [2025-02-06 10:06:02,390 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 24 mSDsluCounter, 2086 mSDsCounter, 0 mSdLazyCounter, 3313 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 2136 SdHoareTripleChecker+Invalid, 3324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-02-06 10:06:02,390 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 2136 Invalid, 3324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3313 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2025-02-06 10:06:02,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2025-02-06 10:06:02,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2025-02-06 10:06:02,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 129 states have internal predecessors, (131), 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) [2025-02-06 10:06:02,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2025-02-06 10:06:02,395 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 126 [2025-02-06 10:06:02,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:06:02,396 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2025-02-06 10:06:02,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.4489795918367347) internal successors, (169), 49 states have internal predecessors, (169), 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) [2025-02-06 10:06:02,396 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2025-02-06 10:06:02,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2025-02-06 10:06:02,397 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:06:02,397 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:06:02,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-02-06 10:06:02,597 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,SelfDestructingSolverStorable33 [2025-02-06 10:06:02,597 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:06:02,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:06:02,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1658047935, now seen corresponding path program 23 times [2025-02-06 10:06:02,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:06:02,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995072429] [2025-02-06 10:06:02,598 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 10:06:02,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:06:02,611 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 129 statements into 13 equivalence classes. [2025-02-06 10:06:02,634 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 129 of 129 statements. [2025-02-06 10:06:02,634 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-02-06 10:06:02,634 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:06:03,740 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 176 proven. 520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:06:03,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:06:03,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995072429] [2025-02-06 10:06:03,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995072429] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 10:06:03,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856017723] [2025-02-06 10:06:03,740 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 10:06:03,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:06:03,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:06:03,742 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) [2025-02-06 10:06:03,744 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 [2025-02-06 10:06:03,861 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 129 statements into 13 equivalence classes. [2025-02-06 10:06:03,949 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 129 of 129 statements. [2025-02-06 10:06:03,949 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-02-06 10:06:03,949 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:06:03,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 124 conjuncts are in the unsatisfiable core [2025-02-06 10:06:03,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:06:03,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 10:06:04,541 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 176 proven. 520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:06:04,541 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 10:06:05,893 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 176 proven. 520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:06:05,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856017723] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 10:06:05,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 10:06:05,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 70 [2025-02-06 10:06:05,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214056445] [2025-02-06 10:06:05,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 10:06:05,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2025-02-06 10:06:05,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:06:05,894 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2025-02-06 10:06:05,895 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=721, Invalid=4249, Unknown=0, NotChecked=0, Total=4970 [2025-02-06 10:06:05,895 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand has 71 states, 70 states have (on average 4.314285714285714) internal successors, (302), 71 states have internal predecessors, (302), 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) [2025-02-06 10:06:06,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:06:06,615 INFO L93 Difference]: Finished difference Result 142 states and 143 transitions. [2025-02-06 10:06:06,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-02-06 10:06:06,615 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 4.314285714285714) internal successors, (302), 71 states have internal predecessors, (302), 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 129 [2025-02-06 10:06:06,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:06:06,616 INFO L225 Difference]: With dead ends: 142 [2025-02-06 10:06:06,616 INFO L226 Difference]: Without dead ends: 142 [2025-02-06 10:06:06,616 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=762, Invalid=4350, Unknown=0, NotChecked=0, Total=5112 [2025-02-06 10:06:06,617 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 18 mSDsluCounter, 1086 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 1750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-02-06 10:06:06,617 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 1143 Invalid, 1750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1749 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-02-06 10:06:06,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2025-02-06 10:06:06,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 137. [2025-02-06 10:06:06,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 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) [2025-02-06 10:06:06,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2025-02-06 10:06:06,620 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 129 [2025-02-06 10:06:06,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:06:06,620 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2025-02-06 10:06:06,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 4.314285714285714) internal successors, (302), 71 states have internal predecessors, (302), 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) [2025-02-06 10:06:06,629 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2025-02-06 10:06:06,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2025-02-06 10:06:06,630 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:06:06,630 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:06:06,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-02-06 10:06:06,830 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,SelfDestructingSolverStorable34 [2025-02-06 10:06:06,831 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:06:06,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:06:06,831 INFO L85 PathProgramCache]: Analyzing trace with hash -734976749, now seen corresponding path program 24 times [2025-02-06 10:06:06,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:06:06,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068429062] [2025-02-06 10:06:06,832 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 10:06:06,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:06:06,847 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 136 statements into 14 equivalence classes. [2025-02-06 10:06:06,879 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) and asserted 136 of 136 statements. [2025-02-06 10:06:06,879 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2025-02-06 10:06:06,879 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:06:08,180 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 62 proven. 720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:06:08,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:06:08,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068429062] [2025-02-06 10:06:08,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068429062] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 10:06:08,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922871328] [2025-02-06 10:06:08,180 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 10:06:08,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:06:08,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:06:08,183 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) [2025-02-06 10:06:08,184 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 [2025-02-06 10:06:08,307 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 136 statements into 14 equivalence classes. [2025-02-06 10:06:08,481 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) and asserted 136 of 136 statements. [2025-02-06 10:06:08,481 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2025-02-06 10:06:08,481 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:06:08,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 139 conjuncts are in the unsatisfiable core [2025-02-06 10:06:08,488 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:06:08,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-02-06 10:06:09,155 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 62 proven. 720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:06:09,155 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 10:06:09,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2025-02-06 10:06:09,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2025-02-06 10:06:09,364 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 62 proven. 720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:06:09,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922871328] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 10:06:09,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 10:06:09,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 52 [2025-02-06 10:06:09,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608938500] [2025-02-06 10:06:09,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 10:06:09,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2025-02-06 10:06:09,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 10:06:09,365 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2025-02-06 10:06:09,365 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2520, Unknown=0, NotChecked=0, Total=2652 [2025-02-06 10:06:09,366 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 52 states, 52 states have (on average 3.5961538461538463) internal successors, (187), 52 states have internal predecessors, (187), 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) [2025-02-06 10:06:10,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 10:06:10,845 INFO L93 Difference]: Finished difference Result 232 states and 233 transitions. [2025-02-06 10:06:10,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2025-02-06 10:06:10,846 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.5961538461538463) internal successors, (187), 52 states have internal predecessors, (187), 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 136 [2025-02-06 10:06:10,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 10:06:10,846 INFO L225 Difference]: With dead ends: 232 [2025-02-06 10:06:10,846 INFO L226 Difference]: Without dead ends: 142 [2025-02-06 10:06:10,847 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=205, Invalid=4085, Unknown=0, NotChecked=0, Total=4290 [2025-02-06 10:06:10,847 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 20 mSDsluCounter, 1898 mSDsCounter, 0 mSdLazyCounter, 3158 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1952 SdHoareTripleChecker+Invalid, 3170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 3158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-02-06 10:06:10,847 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1952 Invalid, 3170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 3158 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2025-02-06 10:06:10,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2025-02-06 10:06:10,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2025-02-06 10:06:10,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.014388489208633) internal successors, (141), 139 states have internal predecessors, (141), 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) [2025-02-06 10:06:10,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2025-02-06 10:06:10,850 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 136 [2025-02-06 10:06:10,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 10:06:10,851 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2025-02-06 10:06:10,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.5961538461538463) internal successors, (187), 52 states have internal predecessors, (187), 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) [2025-02-06 10:06:10,851 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2025-02-06 10:06:10,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2025-02-06 10:06:10,852 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 10:06:10,852 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 10:06:10,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-02-06 10:06:11,052 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,SelfDestructingSolverStorable35 [2025-02-06 10:06:11,053 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2025-02-06 10:06:11,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 10:06:11,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1191508122, now seen corresponding path program 25 times [2025-02-06 10:06:11,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 10:06:11,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278142550] [2025-02-06 10:06:11,053 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 10:06:11,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 10:06:11,064 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 139 statements into 1 equivalence classes. [2025-02-06 10:06:11,073 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 139 of 139 statements. [2025-02-06 10:06:11,074 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:06:11,074 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:06:12,270 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 176 proven. 643 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:06:12,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 10:06:12,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278142550] [2025-02-06 10:06:12,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278142550] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 10:06:12,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917433471] [2025-02-06 10:06:12,271 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 10:06:12,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 10:06:12,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 10:06:12,272 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) [2025-02-06 10:06:12,273 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 [2025-02-06 10:06:12,409 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 139 statements into 1 equivalence classes. [2025-02-06 10:06:12,462 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 139 of 139 statements. [2025-02-06 10:06:12,463 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 10:06:12,463 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 10:06:12,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 129 conjuncts are in the unsatisfiable core [2025-02-06 10:06:12,472 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 10:06:13,222 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 210 proven. 609 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 10:06:13,222 INFO L312 TraceCheckSpWp]: Computing backward predicates...