./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 48c9605d 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/verifythis/elimination_max_rec_onepoint.c -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 3a80fea07b3dad363ac033c87feb8bfcf28a57d2e75bc95b67f90908b133efe1 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 06:19:17,043 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 06:19:17,090 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-08 06:19:17,093 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 06:19:17,093 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 06:19:17,118 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 06:19:17,119 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 06:19:17,120 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 06:19:17,120 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 06:19:17,120 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 06:19:17,120 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 06:19:17,121 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 06:19:17,121 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 06:19:17,122 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 06:19:17,122 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 06:19:17,122 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 06:19:17,122 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 06:19:17,122 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 06:19:17,122 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 06:19:17,122 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 06:19:17,122 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-08 06:19:17,122 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-08 06:19:17,122 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-08 06:19:17,122 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 06:19:17,122 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-08 06:19:17,122 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-08 06:19:17,122 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 06:19:17,122 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 06:19:17,122 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 06:19:17,122 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 06:19:17,123 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 06:19:17,123 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 06:19:17,123 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 06:19:17,123 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 06:19:17,123 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 06:19:17,123 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 06:19:17,124 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 06:19:17,124 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 06:19:17,124 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 06:19:17,124 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 06:19:17,124 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 06:19:17,124 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 06:19:17,124 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 -> 3a80fea07b3dad363ac033c87feb8bfcf28a57d2e75bc95b67f90908b133efe1 [2025-02-08 06:19:17,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 06:19:17,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 06:19:17,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 06:19:17,365 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 06:19:17,365 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 06:19:17,366 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2025-02-08 06:19:18,493 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/54eaab1d9/43c5d07f8e0e4ab880792c2996450bd2/FLAGa20807698 [2025-02-08 06:19:18,745 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 06:19:18,746 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2025-02-08 06:19:18,753 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/54eaab1d9/43c5d07f8e0e4ab880792c2996450bd2/FLAGa20807698 [2025-02-08 06:19:18,787 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/54eaab1d9/43c5d07f8e0e4ab880792c2996450bd2 [2025-02-08 06:19:18,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 06:19:18,791 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 06:19:18,792 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 06:19:18,792 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 06:19:18,796 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 06:19:18,798 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 06:19:18" (1/1) ... [2025-02-08 06:19:18,799 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d597279 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 06:19:18, skipping insertion in model container [2025-02-08 06:19:18,799 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 06:19:18" (1/1) ... [2025-02-08 06:19:18,810 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 06:19:18,932 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 06:19:18,940 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 06:19:18,957 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 06:19:18,971 INFO L204 MainTranslator]: Completed translation [2025-02-08 06:19:18,971 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 06:19:18 WrapperNode [2025-02-08 06:19:18,972 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 06:19:18,972 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 06:19:18,973 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 06:19:18,973 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 06:19:18,977 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 06:19:18" (1/1) ... [2025-02-08 06:19:18,986 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 06:19:18" (1/1) ... [2025-02-08 06:19:18,998 INFO L138 Inliner]: procedures = 19, calls = 25, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 46 [2025-02-08 06:19:18,999 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 06:19:19,000 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 06:19:19,000 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 06:19:19,000 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 06:19:19,006 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 06:19:18" (1/1) ... [2025-02-08 06:19:19,006 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 06:19:18" (1/1) ... [2025-02-08 06:19:19,007 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 06:19:18" (1/1) ... [2025-02-08 06:19:19,019 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-02-08 06:19:19,020 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 06:19:18" (1/1) ... [2025-02-08 06:19:19,021 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 06:19:18" (1/1) ... [2025-02-08 06:19:19,025 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 06:19:18" (1/1) ... [2025-02-08 06:19:19,029 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 06:19:18" (1/1) ... [2025-02-08 06:19:19,030 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 06:19:18" (1/1) ... [2025-02-08 06:19:19,030 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 06:19:18" (1/1) ... [2025-02-08 06:19:19,031 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 06:19:19,031 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 06:19:19,031 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 06:19:19,031 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 06:19:19,036 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 06:19:18" (1/1) ... [2025-02-08 06:19:19,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 06:19:19,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 06:19:19,063 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) [2025-02-08 06:19:19,070 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 [2025-02-08 06:19:19,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 06:19:19,085 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-02-08 06:19:19,085 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-02-08 06:19:19,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 06:19:19,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-08 06:19:19,085 INFO L130 BoogieDeclarations]: Found specification of procedure check [2025-02-08 06:19:19,085 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2025-02-08 06:19:19,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-08 06:19:19,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 06:19:19,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 06:19:19,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-08 06:19:19,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-08 06:19:19,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-02-08 06:19:19,086 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-02-08 06:19:19,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-08 06:19:19,147 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 06:19:19,149 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 06:19:19,344 INFO L? ?]: Removed 48 outVars from TransFormulas that were not future-live. [2025-02-08 06:19:19,345 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 06:19:19,358 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 06:19:19,358 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 06:19:19,359 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 06:19:19 BoogieIcfgContainer [2025-02-08 06:19:19,359 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 06:19:19,365 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 06:19:19,365 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 06:19:19,368 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 06:19:19,368 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 06:19:18" (1/3) ... [2025-02-08 06:19:19,373 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34974472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 06:19:19, skipping insertion in model container [2025-02-08 06:19:19,373 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 06:19:18" (2/3) ... [2025-02-08 06:19:19,373 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34974472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 06:19:19, skipping insertion in model container [2025-02-08 06:19:19,373 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 06:19:19" (3/3) ... [2025-02-08 06:19:19,374 INFO L128 eAbstractionObserver]: Analyzing ICFG elimination_max_rec_onepoint.c [2025-02-08 06:19:19,395 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 06:19:19,397 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG elimination_max_rec_onepoint.c that has 4 procedures, 62 locations, 1 initial locations, 0 loop locations, and 17 error locations. [2025-02-08 06:19:19,450 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 06:19:19,459 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;@435cb69f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 06:19:19,460 INFO L334 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2025-02-08 06:19:19,464 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 50 states have internal predecessors, (54), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-02-08 06:19:19,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-02-08 06:19:19,468 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 06:19:19,468 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 06:19:19,468 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 14 more)] === [2025-02-08 06:19:19,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 06:19:19,473 INFO L85 PathProgramCache]: Analyzing trace with hash 820793634, now seen corresponding path program 1 times [2025-02-08 06:19:19,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 06:19:19,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175519450] [2025-02-08 06:19:19,480 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 06:19:19,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 06:19:19,537 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-08 06:19:19,550 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-08 06:19:19,550 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 06:19:19,550 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 06:19:19,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 06:19:19,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 06:19:19,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175519450] [2025-02-08 06:19:19,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175519450] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 06:19:19,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284786756] [2025-02-08 06:19:19,597 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 06:19:19,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 06:19:19,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 06:19:19,604 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) [2025-02-08 06:19:19,605 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 [2025-02-08 06:19:19,643 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-08 06:19:19,658 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-08 06:19:19,658 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 06:19:19,658 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 06:19:19,659 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-02-08 06:19:19,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 06:19:19,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 06:19:19,668 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 06:19:19,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284786756] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 06:19:19,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 06:19:19,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-02-08 06:19:19,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427455060] [2025-02-08 06:19:19,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 06:19:19,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-08 06:19:19,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 06:19:19,686 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-08 06:19:19,687 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-08 06:19:19,688 INFO L87 Difference]: Start difference. First operand has 62 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 50 states have internal predecessors, (54), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-08 06:19:19,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 06:19:19,699 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2025-02-08 06:19:19,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-08 06:19:19,700 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2025-02-08 06:19:19,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 06:19:19,704 INFO L225 Difference]: With dead ends: 62 [2025-02-08 06:19:19,704 INFO L226 Difference]: Without dead ends: 60 [2025-02-08 06:19:19,705 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-08 06:19:19,707 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-08 06:19:19,708 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-08 06:19:19,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2025-02-08 06:19:19,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2025-02-08 06:19:19,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 32 states have (on average 1.5625) internal successors, (50), 48 states have internal predecessors, (50), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-02-08 06:19:19,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2025-02-08 06:19:19,731 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 20 [2025-02-08 06:19:19,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 06:19:19,732 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2025-02-08 06:19:19,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-08 06:19:19,732 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2025-02-08 06:19:19,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-02-08 06:19:19,733 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 06:19:19,733 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 06:19:19,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-08 06:19:19,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-02-08 06:19:19,934 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 14 more)] === [2025-02-08 06:19:19,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 06:19:19,935 INFO L85 PathProgramCache]: Analyzing trace with hash 377151972, now seen corresponding path program 1 times [2025-02-08 06:19:19,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 06:19:19,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429077018] [2025-02-08 06:19:19,935 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 06:19:19,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 06:19:19,941 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-08 06:19:19,966 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-08 06:19:19,966 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 06:19:19,966 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 06:19:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 06:19:20,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 06:19:20,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429077018] [2025-02-08 06:19:20,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429077018] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 06:19:20,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 06:19:20,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-08 06:19:20,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978767922] [2025-02-08 06:19:20,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 06:19:20,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 06:19:20,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 06:19:20,223 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 06:19:20,223 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-08 06:19:20,223 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-08 06:19:20,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 06:19:20,360 INFO L93 Difference]: Finished difference Result 104 states and 117 transitions. [2025-02-08 06:19:20,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 06:19:20,361 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2025-02-08 06:19:20,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 06:19:20,362 INFO L225 Difference]: With dead ends: 104 [2025-02-08 06:19:20,363 INFO L226 Difference]: Without dead ends: 104 [2025-02-08 06:19:20,363 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-02-08 06:19:20,363 INFO L435 NwaCegarLoop]: 66 mSDtfsCounter, 42 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-08 06:19:20,363 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 304 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-08 06:19:20,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2025-02-08 06:19:20,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 83. [2025-02-08 06:19:20,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 65 states have internal predecessors, (76), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2025-02-08 06:19:20,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 102 transitions. [2025-02-08 06:19:20,378 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 102 transitions. Word has length 20 [2025-02-08 06:19:20,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 06:19:20,378 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 102 transitions. [2025-02-08 06:19:20,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-08 06:19:20,379 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 102 transitions. [2025-02-08 06:19:20,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-02-08 06:19:20,379 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 06:19:20,379 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 06:19:20,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 06:19:20,379 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 14 more)] === [2025-02-08 06:19:20,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 06:19:20,382 INFO L85 PathProgramCache]: Analyzing trace with hash 375606333, now seen corresponding path program 1 times [2025-02-08 06:19:20,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 06:19:20,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956158943] [2025-02-08 06:19:20,382 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 06:19:20,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 06:19:20,391 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-08 06:19:20,412 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-08 06:19:20,412 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 06:19:20,412 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 06:19:20,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 06:19:20,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 06:19:20,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956158943] [2025-02-08 06:19:20,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956158943] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 06:19:20,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 06:19:20,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-02-08 06:19:20,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785696300] [2025-02-08 06:19:20,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 06:19:20,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-08 06:19:20,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 06:19:20,731 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-08 06:19:20,731 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-02-08 06:19:20,731 INFO L87 Difference]: Start difference. First operand 83 states and 102 transitions. Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-08 06:19:20,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 06:19:20,931 INFO L93 Difference]: Finished difference Result 89 states and 111 transitions. [2025-02-08 06:19:20,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 06:19:20,933 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2025-02-08 06:19:20,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 06:19:20,933 INFO L225 Difference]: With dead ends: 89 [2025-02-08 06:19:20,933 INFO L226 Difference]: Without dead ends: 89 [2025-02-08 06:19:20,934 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2025-02-08 06:19:20,934 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 13 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-08 06:19:20,934 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 321 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-08 06:19:20,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2025-02-08 06:19:20,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2025-02-08 06:19:20,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 51 states have (on average 1.5686274509803921) internal successors, (80), 68 states have internal predecessors, (80), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2025-02-08 06:19:20,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 108 transitions. [2025-02-08 06:19:20,961 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 108 transitions. Word has length 20 [2025-02-08 06:19:20,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 06:19:20,962 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 108 transitions. [2025-02-08 06:19:20,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-08 06:19:20,963 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 108 transitions. [2025-02-08 06:19:20,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-02-08 06:19:20,964 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 06:19:20,964 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 06:19:20,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-08 06:19:20,964 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 14 more)] === [2025-02-08 06:19:20,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 06:19:20,964 INFO L85 PathProgramCache]: Analyzing trace with hash 375606332, now seen corresponding path program 1 times [2025-02-08 06:19:20,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 06:19:20,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527824301] [2025-02-08 06:19:20,965 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 06:19:20,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 06:19:20,973 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-02-08 06:19:20,977 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-02-08 06:19:20,979 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 06:19:20,980 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 06:19:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 06:19:21,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 06:19:21,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527824301] [2025-02-08 06:19:21,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527824301] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 06:19:21,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 06:19:21,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 06:19:21,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103728482] [2025-02-08 06:19:21,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 06:19:21,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 06:19:21,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 06:19:21,007 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 06:19:21,008 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 06:19:21,008 INFO L87 Difference]: Start difference. First operand 87 states and 108 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-08 06:19:21,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 06:19:21,043 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2025-02-08 06:19:21,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 06:19:21,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2025-02-08 06:19:21,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 06:19:21,044 INFO L225 Difference]: With dead ends: 84 [2025-02-08 06:19:21,044 INFO L226 Difference]: Without dead ends: 84 [2025-02-08 06:19:21,044 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 [2025-02-08 06:19:21,049 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 7 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-08 06:19:21,049 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 92 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-08 06:19:21,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2025-02-08 06:19:21,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2025-02-08 06:19:21,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 65 states have internal predecessors, (76), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2025-02-08 06:19:21,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2025-02-08 06:19:21,057 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 20 [2025-02-08 06:19:21,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 06:19:21,057 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2025-02-08 06:19:21,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-08 06:19:21,057 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2025-02-08 06:19:21,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-02-08 06:19:21,058 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 06:19:21,058 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 06:19:21,058 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-08 06:19:21,058 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 14 more)] === [2025-02-08 06:19:21,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 06:19:21,058 INFO L85 PathProgramCache]: Analyzing trace with hash 180431642, now seen corresponding path program 1 times [2025-02-08 06:19:21,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 06:19:21,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395233217] [2025-02-08 06:19:21,059 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 06:19:21,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 06:19:21,066 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-08 06:19:21,073 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 06:19:21,077 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 06:19:21,077 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 06:19:21,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 06:19:21,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 06:19:21,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395233217] [2025-02-08 06:19:21,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395233217] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 06:19:21,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 06:19:21,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-08 06:19:21,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632839896] [2025-02-08 06:19:21,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 06:19:21,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 06:19:21,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 06:19:21,169 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 06:19:21,169 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-02-08 06:19:21,170 INFO L87 Difference]: Start difference. First operand 84 states and 104 transitions. Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-08 06:19:21,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 06:19:21,247 INFO L93 Difference]: Finished difference Result 113 states and 146 transitions. [2025-02-08 06:19:21,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 06:19:21,247 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2025-02-08 06:19:21,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 06:19:21,248 INFO L225 Difference]: With dead ends: 113 [2025-02-08 06:19:21,248 INFO L226 Difference]: Without dead ends: 113 [2025-02-08 06:19:21,248 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-02-08 06:19:21,249 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 28 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-08 06:19:21,249 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 325 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-08 06:19:21,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2025-02-08 06:19:21,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 85. [2025-02-08 06:19:21,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 53 states have (on average 1.4528301886792452) internal successors, (77), 66 states have internal predecessors, (77), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2025-02-08 06:19:21,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 105 transitions. [2025-02-08 06:19:21,254 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 105 transitions. Word has length 22 [2025-02-08 06:19:21,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 06:19:21,254 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 105 transitions. [2025-02-08 06:19:21,254 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-08 06:19:21,254 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 105 transitions. [2025-02-08 06:19:21,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-02-08 06:19:21,254 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 06:19:21,254 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 06:19:21,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-08 06:19:21,255 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 14 more)] === [2025-02-08 06:19:21,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 06:19:21,255 INFO L85 PathProgramCache]: Analyzing trace with hash 265416430, now seen corresponding path program 1 times [2025-02-08 06:19:21,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 06:19:21,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689817990] [2025-02-08 06:19:21,258 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 06:19:21,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 06:19:21,266 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-08 06:19:21,275 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-08 06:19:21,275 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 06:19:21,275 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 06:19:21,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 06:19:21,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 06:19:21,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689817990] [2025-02-08 06:19:21,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689817990] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 06:19:21,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 06:19:21,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-02-08 06:19:21,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542043092] [2025-02-08 06:19:21,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 06:19:21,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-08 06:19:21,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 06:19:21,472 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-08 06:19:21,472 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2025-02-08 06:19:21,472 INFO L87 Difference]: Start difference. First operand 85 states and 105 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-08 06:19:21,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 06:19:21,583 INFO L93 Difference]: Finished difference Result 89 states and 108 transitions. [2025-02-08 06:19:21,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 06:19:21,584 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2025-02-08 06:19:21,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 06:19:21,585 INFO L225 Difference]: With dead ends: 89 [2025-02-08 06:19:21,585 INFO L226 Difference]: Without dead ends: 89 [2025-02-08 06:19:21,585 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2025-02-08 06:19:21,586 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 19 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-08 06:19:21,586 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 420 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-08 06:19:21,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2025-02-08 06:19:21,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2025-02-08 06:19:21,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 56 states have (on average 1.4285714285714286) internal successors, (80), 69 states have internal predecessors, (80), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2025-02-08 06:19:21,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2025-02-08 06:19:21,590 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 27 [2025-02-08 06:19:21,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 06:19:21,590 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2025-02-08 06:19:21,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-02-08 06:19:21,591 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2025-02-08 06:19:21,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-02-08 06:19:21,591 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 06:19:21,591 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 06:19:21,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-08 06:19:21,592 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting checkErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 14 more)] === [2025-02-08 06:19:21,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 06:19:21,592 INFO L85 PathProgramCache]: Analyzing trace with hash 758030545, now seen corresponding path program 1 times [2025-02-08 06:19:21,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 06:19:21,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932111693] [2025-02-08 06:19:21,592 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 06:19:21,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 06:19:21,597 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-08 06:19:21,607 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 06:19:21,607 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 06:19:21,607 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 06:19:21,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 06:19:21,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 06:19:21,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932111693] [2025-02-08 06:19:21,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932111693] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 06:19:21,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221069585] [2025-02-08 06:19:21,844 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 06:19:21,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 06:19:21,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 06:19:21,846 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) [2025-02-08 06:19:21,856 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 [2025-02-08 06:19:21,887 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-08 06:19:21,903 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 06:19:21,903 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 06:19:21,903 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 06:19:21,904 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-02-08 06:19:21,910 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 06:19:21,986 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 10 treesize of output 9 [2025-02-08 06:19:22,536 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 06:19:22,536 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 06:19:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 06:19:22,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221069585] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 06:19:22,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 06:19:22,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 20 [2025-02-08 06:19:22,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293905511] [2025-02-08 06:19:22,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 06:19:22,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-08 06:19:22,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 06:19:22,809 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-08 06:19:22,809 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2025-02-08 06:19:22,809 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand has 21 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2025-02-08 06:19:23,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 06:19:23,791 INFO L93 Difference]: Finished difference Result 150 states and 179 transitions. [2025-02-08 06:19:23,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-08 06:19:23,791 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) Word has length 28 [2025-02-08 06:19:23,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 06:19:23,792 INFO L225 Difference]: With dead ends: 150 [2025-02-08 06:19:23,792 INFO L226 Difference]: Without dead ends: 150 [2025-02-08 06:19:23,793 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2025-02-08 06:19:23,793 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 196 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-08 06:19:23,793 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 424 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-08 06:19:23,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2025-02-08 06:19:23,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 112. [2025-02-08 06:19:23,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 72 states have (on average 1.4444444444444444) internal successors, (104), 86 states have internal predecessors, (104), 19 states have call successors, (19), 8 states have call predecessors, (19), 9 states have return successors, (21), 17 states have call predecessors, (21), 19 states have call successors, (21) [2025-02-08 06:19:23,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 144 transitions. [2025-02-08 06:19:23,802 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 144 transitions. Word has length 28 [2025-02-08 06:19:23,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 06:19:23,802 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 144 transitions. [2025-02-08 06:19:23,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2025-02-08 06:19:23,802 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 144 transitions. [2025-02-08 06:19:23,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-02-08 06:19:23,803 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 06:19:23,803 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 06:19:23,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-08 06:19:24,003 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 06:19:24,005 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting checkErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 14 more)] === [2025-02-08 06:19:24,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 06:19:24,006 INFO L85 PathProgramCache]: Analyzing trace with hash 758030544, now seen corresponding path program 1 times [2025-02-08 06:19:24,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 06:19:24,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449189728] [2025-02-08 06:19:24,006 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 06:19:24,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 06:19:24,018 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-08 06:19:24,029 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-08 06:19:24,029 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 06:19:24,029 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 06:19:24,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-08 06:19:24,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 06:19:24,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449189728] [2025-02-08 06:19:24,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449189728] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 06:19:24,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 06:19:24,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 06:19:24,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043383536] [2025-02-08 06:19:24,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 06:19:24,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 06:19:24,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 06:19:24,075 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 06:19:24,075 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-08 06:19:24,075 INFO L87 Difference]: Start difference. First operand 112 states and 144 transitions. Second operand has 5 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-08 06:19:24,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 06:19:24,144 INFO L93 Difference]: Finished difference Result 112 states and 139 transitions. [2025-02-08 06:19:24,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 06:19:24,144 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2025-02-08 06:19:24,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 06:19:24,145 INFO L225 Difference]: With dead ends: 112 [2025-02-08 06:19:24,145 INFO L226 Difference]: Without dead ends: 112 [2025-02-08 06:19:24,145 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-08 06:19:24,146 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 36 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-08 06:19:24,146 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 100 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-08 06:19:24,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2025-02-08 06:19:24,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2025-02-08 06:19:24,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 72 states have (on average 1.2777777777777777) internal successors, (92), 82 states have internal predecessors, (92), 19 states have call successors, (19), 8 states have call predecessors, (19), 9 states have return successors, (21), 17 states have call predecessors, (21), 19 states have call successors, (21) [2025-02-08 06:19:24,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 132 transitions. [2025-02-08 06:19:24,152 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 132 transitions. Word has length 28 [2025-02-08 06:19:24,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 06:19:24,152 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 132 transitions. [2025-02-08 06:19:24,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-08 06:19:24,153 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 132 transitions. [2025-02-08 06:19:24,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-02-08 06:19:24,153 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 06:19:24,153 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 06:19:24,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-08 06:19:24,154 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting checkErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 14 more)] === [2025-02-08 06:19:24,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 06:19:24,154 INFO L85 PathProgramCache]: Analyzing trace with hash 2024110398, now seen corresponding path program 1 times [2025-02-08 06:19:24,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 06:19:24,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441960317] [2025-02-08 06:19:24,154 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 06:19:24,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 06:19:24,159 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-08 06:19:24,170 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-08 06:19:24,170 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 06:19:24,170 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 06:19:24,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 06:19:24,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 06:19:24,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441960317] [2025-02-08 06:19:24,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441960317] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 06:19:24,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656354332] [2025-02-08 06:19:24,427 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 06:19:24,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 06:19:24,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 06:19:24,432 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) [2025-02-08 06:19:24,434 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 [2025-02-08 06:19:24,463 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-08 06:19:24,474 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-08 06:19:24,474 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 06:19:24,474 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 06:19:24,475 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-08 06:19:24,476 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 06:19:24,501 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 10 treesize of output 9 [2025-02-08 06:19:24,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 06:19:24,839 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 06:19:25,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 06:19:25,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656354332] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 06:19:25,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 06:19:25,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 23 [2025-02-08 06:19:25,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297256251] [2025-02-08 06:19:25,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 06:19:25,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-08 06:19:25,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 06:19:25,099 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-08 06:19:25,099 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2025-02-08 06:19:25,099 INFO L87 Difference]: Start difference. First operand 108 states and 132 transitions. Second operand has 24 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 7 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2025-02-08 06:19:26,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 06:19:26,032 INFO L93 Difference]: Finished difference Result 132 states and 157 transitions. [2025-02-08 06:19:26,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-08 06:19:26,033 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 7 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) Word has length 29 [2025-02-08 06:19:26,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 06:19:26,034 INFO L225 Difference]: With dead ends: 132 [2025-02-08 06:19:26,034 INFO L226 Difference]: Without dead ends: 132 [2025-02-08 06:19:26,035 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=285, Invalid=1521, Unknown=0, NotChecked=0, Total=1806 [2025-02-08 06:19:26,035 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 231 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-08 06:19:26,035 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 372 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-08 06:19:26,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2025-02-08 06:19:26,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 106. [2025-02-08 06:19:26,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 80 states have internal predecessors, (88), 19 states have call successors, (19), 8 states have call predecessors, (19), 9 states have return successors, (21), 17 states have call predecessors, (21), 19 states have call successors, (21) [2025-02-08 06:19:26,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 128 transitions. [2025-02-08 06:19:26,039 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 128 transitions. Word has length 29 [2025-02-08 06:19:26,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 06:19:26,040 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 128 transitions. [2025-02-08 06:19:26,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 7 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2025-02-08 06:19:26,040 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 128 transitions. [2025-02-08 06:19:26,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-02-08 06:19:26,040 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 06:19:26,040 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 06:19:26,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-08 06:19:26,240 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 06:19:26,241 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 14 more)] === [2025-02-08 06:19:26,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 06:19:26,241 INFO L85 PathProgramCache]: Analyzing trace with hash -12822387, now seen corresponding path program 1 times [2025-02-08 06:19:26,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 06:19:26,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908468681] [2025-02-08 06:19:26,241 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 06:19:26,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 06:19:26,245 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-08 06:19:26,247 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-08 06:19:26,247 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 06:19:26,247 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 06:19:26,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 06:19:26,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 06:19:26,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908468681] [2025-02-08 06:19:26,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908468681] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 06:19:26,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 06:19:26,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 06:19:26,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590779178] [2025-02-08 06:19:26,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 06:19:26,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 06:19:26,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 06:19:26,259 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 06:19:26,259 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 06:19:26,259 INFO L87 Difference]: Start difference. First operand 106 states and 128 transitions. Second operand has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-08 06:19:26,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 06:19:26,268 INFO L93 Difference]: Finished difference Result 105 states and 127 transitions. [2025-02-08 06:19:26,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 06:19:26,269 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2025-02-08 06:19:26,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 06:19:26,269 INFO L225 Difference]: With dead ends: 105 [2025-02-08 06:19:26,269 INFO L226 Difference]: Without dead ends: 105 [2025-02-08 06:19:26,270 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 [2025-02-08 06:19:26,270 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 1 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-08 06:19:26,270 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 88 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-08 06:19:26,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2025-02-08 06:19:26,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2025-02-08 06:19:26,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 79 states have internal predecessors, (87), 19 states have call successors, (19), 8 states have call predecessors, (19), 9 states have return successors, (21), 17 states have call predecessors, (21), 19 states have call successors, (21) [2025-02-08 06:19:26,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2025-02-08 06:19:26,274 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 30 [2025-02-08 06:19:26,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 06:19:26,274 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2025-02-08 06:19:26,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-08 06:19:26,274 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2025-02-08 06:19:26,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-02-08 06:19:26,275 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 06:19:26,275 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 06:19:26,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-02-08 06:19:26,275 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 14 more)] === [2025-02-08 06:19:26,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 06:19:26,275 INFO L85 PathProgramCache]: Analyzing trace with hash 562587083, now seen corresponding path program 1 times [2025-02-08 06:19:26,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 06:19:26,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248117396] [2025-02-08 06:19:26,276 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 06:19:26,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 06:19:26,282 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-08 06:19:26,286 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-08 06:19:26,286 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 06:19:26,286 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 06:19:26,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 06:19:26,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 06:19:26,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248117396] [2025-02-08 06:19:26,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248117396] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 06:19:26,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 06:19:26,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 06:19:26,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536064564] [2025-02-08 06:19:26,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 06:19:26,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 06:19:26,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 06:19:26,320 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 06:19:26,320 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 06:19:26,320 INFO L87 Difference]: Start difference. First operand 105 states and 127 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-08 06:19:26,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 06:19:26,343 INFO L93 Difference]: Finished difference Result 104 states and 126 transitions. [2025-02-08 06:19:26,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 06:19:26,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2025-02-08 06:19:26,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 06:19:26,344 INFO L225 Difference]: With dead ends: 104 [2025-02-08 06:19:26,344 INFO L226 Difference]: Without dead ends: 88 [2025-02-08 06:19:26,344 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 [2025-02-08 06:19:26,345 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 0 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-08 06:19:26,345 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 110 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-08 06:19:26,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2025-02-08 06:19:26,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2025-02-08 06:19:26,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 65 states have internal predecessors, (72), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (19), 15 states have call predecessors, (19), 18 states have call successors, (19) [2025-02-08 06:19:26,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2025-02-08 06:19:26,348 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 32 [2025-02-08 06:19:26,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 06:19:26,348 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2025-02-08 06:19:26,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-08 06:19:26,348 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2025-02-08 06:19:26,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-02-08 06:19:26,349 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 06:19:26,349 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 06:19:26,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-02-08 06:19:26,349 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 14 more)] === [2025-02-08 06:19:26,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 06:19:26,349 INFO L85 PathProgramCache]: Analyzing trace with hash -13935831, now seen corresponding path program 1 times [2025-02-08 06:19:26,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 06:19:26,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766487487] [2025-02-08 06:19:26,350 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 06:19:26,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 06:19:26,353 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-08 06:19:26,357 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-08 06:19:26,357 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 06:19:26,357 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 06:19:26,453 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-08 06:19:26,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 06:19:26,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766487487] [2025-02-08 06:19:26,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766487487] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 06:19:26,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870866473] [2025-02-08 06:19:26,454 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 06:19:26,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 06:19:26,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 06:19:26,458 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) [2025-02-08 06:19:26,463 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 [2025-02-08 06:19:26,493 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-08 06:19:26,506 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-08 06:19:26,506 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 06:19:26,506 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 06:19:26,507 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-08 06:19:26,509 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 06:19:26,610 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-08 06:19:26,610 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 06:19:26,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870866473] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 06:19:26,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 06:19:26,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 12 [2025-02-08 06:19:26,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796414997] [2025-02-08 06:19:26,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 06:19:26,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-08 06:19:26,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 06:19:26,611 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-08 06:19:26,611 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2025-02-08 06:19:26,611 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-08 06:19:26,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 06:19:26,734 INFO L93 Difference]: Finished difference Result 109 states and 132 transitions. [2025-02-08 06:19:26,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 06:19:26,735 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2025-02-08 06:19:26,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 06:19:26,735 INFO L225 Difference]: With dead ends: 109 [2025-02-08 06:19:26,735 INFO L226 Difference]: Without dead ends: 109 [2025-02-08 06:19:26,736 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2025-02-08 06:19:26,736 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 68 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-08 06:19:26,736 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 231 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-08 06:19:26,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2025-02-08 06:19:26,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 92. [2025-02-08 06:19:26,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 68 states have internal predecessors, (75), 18 states have call successors, (18), 8 states have call predecessors, (18), 8 states have return successors, (19), 15 states have call predecessors, (19), 18 states have call successors, (19) [2025-02-08 06:19:26,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2025-02-08 06:19:26,739 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 37 [2025-02-08 06:19:26,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 06:19:26,740 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2025-02-08 06:19:26,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-08 06:19:26,740 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2025-02-08 06:19:26,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-02-08 06:19:26,740 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 06:19:26,740 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 06:19:26,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-08 06:19:26,944 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,SelfDestructingSolverStorable11 [2025-02-08 06:19:26,944 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting checkErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 14 more)] === [2025-02-08 06:19:26,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 06:19:26,944 INFO L85 PathProgramCache]: Analyzing trace with hash -15473078, now seen corresponding path program 1 times [2025-02-08 06:19:26,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 06:19:26,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839376945] [2025-02-08 06:19:26,944 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 06:19:26,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 06:19:26,948 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-08 06:19:26,954 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-08 06:19:26,954 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 06:19:26,954 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 06:19:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 06:19:27,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 06:19:27,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839376945] [2025-02-08 06:19:27,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839376945] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 06:19:27,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938991211] [2025-02-08 06:19:27,047 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 06:19:27,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 06:19:27,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 06:19:27,049 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) [2025-02-08 06:19:27,056 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 [2025-02-08 06:19:27,085 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-02-08 06:19:27,098 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-02-08 06:19:27,098 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 06:19:27,098 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 06:19:27,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-08 06:19:27,100 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 06:19:27,263 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 06:19:27,263 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 06:19:27,293 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 29 treesize of output 25 [2025-02-08 06:19:27,457 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 06:19:27,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938991211] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 06:19:27,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 06:19:27,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 20 [2025-02-08 06:19:27,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095362037] [2025-02-08 06:19:27,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 06:19:27,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-08 06:19:27,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 06:19:27,458 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-08 06:19:27,458 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2025-02-08 06:19:27,458 INFO L87 Difference]: Start difference. First operand 92 states and 112 transitions. Second operand has 21 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 10 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2025-02-08 06:19:27,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 06:19:27,793 INFO L93 Difference]: Finished difference Result 160 states and 203 transitions. [2025-02-08 06:19:27,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-08 06:19:27,793 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 10 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) Word has length 37 [2025-02-08 06:19:27,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 06:19:27,794 INFO L225 Difference]: With dead ends: 160 [2025-02-08 06:19:27,794 INFO L226 Difference]: Without dead ends: 160 [2025-02-08 06:19:27,794 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2025-02-08 06:19:27,795 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 139 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-08 06:19:27,795 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 262 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-08 06:19:27,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2025-02-08 06:19:27,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 145. [2025-02-08 06:19:27,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 98 states have (on average 1.2142857142857142) internal successors, (119), 107 states have internal predecessors, (119), 33 states have call successors, (33), 10 states have call predecessors, (33), 10 states have return successors, (33), 27 states have call predecessors, (33), 33 states have call successors, (33) [2025-02-08 06:19:27,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 185 transitions. [2025-02-08 06:19:27,799 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 185 transitions. Word has length 37 [2025-02-08 06:19:27,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 06:19:27,800 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 185 transitions. [2025-02-08 06:19:27,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 10 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2025-02-08 06:19:27,800 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 185 transitions. [2025-02-08 06:19:27,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-02-08 06:19:27,800 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 06:19:27,800 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 06:19:27,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-08 06:19:28,005 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,SelfDestructingSolverStorable12 [2025-02-08 06:19:28,005 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting checkErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 14 more)] === [2025-02-08 06:19:28,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 06:19:28,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1984726873, now seen corresponding path program 1 times [2025-02-08 06:19:28,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 06:19:28,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818300412] [2025-02-08 06:19:28,005 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 06:19:28,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 06:19:28,014 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-02-08 06:19:28,017 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-02-08 06:19:28,018 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 06:19:28,018 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 06:19:28,225 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-08 06:19:28,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 06:19:28,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818300412] [2025-02-08 06:19:28,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818300412] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 06:19:28,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920746001] [2025-02-08 06:19:28,225 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 06:19:28,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 06:19:28,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 06:19:28,227 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) [2025-02-08 06:19:28,229 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 [2025-02-08 06:19:28,259 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-02-08 06:19:28,278 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-02-08 06:19:28,278 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 06:19:28,278 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 06:19:28,279 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-08 06:19:28,280 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 06:19:28,574 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-08 06:19:28,575 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 06:19:28,792 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 30 treesize of output 26 [2025-02-08 06:19:28,908 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-08 06:19:28,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920746001] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 06:19:28,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 06:19:28,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 32 [2025-02-08 06:19:28,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320225274] [2025-02-08 06:19:28,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 06:19:28,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-02-08 06:19:28,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 06:19:28,912 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-02-08 06:19:28,913 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2025-02-08 06:19:28,913 INFO L87 Difference]: Start difference. First operand 145 states and 185 transitions. Second operand has 33 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 10 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2025-02-08 06:19:32,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-02-08 06:19:34,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 06:19:34,145 INFO L93 Difference]: Finished difference Result 271 states and 338 transitions. [2025-02-08 06:19:34,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-02-08 06:19:34,145 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 10 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 39 [2025-02-08 06:19:34,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 06:19:34,146 INFO L225 Difference]: With dead ends: 271 [2025-02-08 06:19:34,146 INFO L226 Difference]: Without dead ends: 271 [2025-02-08 06:19:34,147 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=585, Invalid=3321, Unknown=0, NotChecked=0, Total=3906 [2025-02-08 06:19:34,148 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 236 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 69 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2025-02-08 06:19:34,148 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 634 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 841 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2025-02-08 06:19:34,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2025-02-08 06:19:34,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 187. [2025-02-08 06:19:34,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 133 states have (on average 1.1804511278195489) internal successors, (157), 141 states have internal predecessors, (157), 33 states have call successors, (33), 12 states have call predecessors, (33), 17 states have return successors, (45), 33 states have call predecessors, (45), 33 states have call successors, (45) [2025-02-08 06:19:34,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 235 transitions. [2025-02-08 06:19:34,154 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 235 transitions. Word has length 39 [2025-02-08 06:19:34,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 06:19:34,154 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 235 transitions. [2025-02-08 06:19:34,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 10 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2025-02-08 06:19:34,154 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 235 transitions. [2025-02-08 06:19:34,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-02-08 06:19:34,155 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 06:19:34,155 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 06:19:34,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-08 06:19:34,359 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,SelfDestructingSolverStorable13 [2025-02-08 06:19:34,359 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 14 more)] === [2025-02-08 06:19:34,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 06:19:34,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1864153487, now seen corresponding path program 1 times [2025-02-08 06:19:34,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 06:19:34,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801668921] [2025-02-08 06:19:34,359 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 06:19:34,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 06:19:34,363 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-02-08 06:19:34,369 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-02-08 06:19:34,370 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 06:19:34,370 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 06:19:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-08 06:19:34,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 06:19:34,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801668921] [2025-02-08 06:19:34,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801668921] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 06:19:34,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260926987] [2025-02-08 06:19:34,566 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 06:19:34,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 06:19:34,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 06:19:34,568 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) [2025-02-08 06:19:34,572 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 [2025-02-08 06:19:34,600 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-02-08 06:19:34,615 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-02-08 06:19:34,615 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 06:19:34,615 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 06:19:34,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-02-08 06:19:34,618 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 06:19:34,660 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 7 treesize of output 6 [2025-02-08 06:19:34,868 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 29 treesize of output 23 [2025-02-08 06:19:34,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 06:19:34,955 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 06:19:39,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260926987] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 06:19:39,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-08 06:19:39,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 25 [2025-02-08 06:19:39,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763347723] [2025-02-08 06:19:39,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-08 06:19:39,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-08 06:19:39,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 06:19:39,107 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-08 06:19:39,107 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2025-02-08 06:19:39,108 INFO L87 Difference]: Start difference. First operand 187 states and 235 transitions. Second operand has 25 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 7 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2025-02-08 06:19:39,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 06:19:39,542 INFO L93 Difference]: Finished difference Result 189 states and 236 transitions. [2025-02-08 06:19:39,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-08 06:19:39,543 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 7 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 44 [2025-02-08 06:19:39,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 06:19:39,544 INFO L225 Difference]: With dead ends: 189 [2025-02-08 06:19:39,544 INFO L226 Difference]: Without dead ends: 189 [2025-02-08 06:19:39,544 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=177, Invalid=1463, Unknown=0, NotChecked=0, Total=1640 [2025-02-08 06:19:39,544 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 45 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-08 06:19:39,545 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 338 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-08 06:19:39,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2025-02-08 06:19:39,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2025-02-08 06:19:39,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 135 states have (on average 1.1703703703703703) internal successors, (158), 142 states have internal predecessors, (158), 33 states have call successors, (33), 13 states have call predecessors, (33), 18 states have return successors, (45), 33 states have call predecessors, (45), 33 states have call successors, (45) [2025-02-08 06:19:39,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 236 transitions. [2025-02-08 06:19:39,550 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 236 transitions. Word has length 44 [2025-02-08 06:19:39,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 06:19:39,550 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 236 transitions. [2025-02-08 06:19:39,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 7 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2025-02-08 06:19:39,550 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 236 transitions. [2025-02-08 06:19:39,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-02-08 06:19:39,551 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 06:19:39,551 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 06:19:39,557 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 [2025-02-08 06:19:39,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 06:19:39,752 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 14 more)] === [2025-02-08 06:19:39,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 06:19:39,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1307017806, now seen corresponding path program 1 times [2025-02-08 06:19:39,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 06:19:39,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673976175] [2025-02-08 06:19:39,752 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 06:19:39,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 06:19:39,756 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-02-08 06:19:39,766 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-02-08 06:19:39,766 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 06:19:39,766 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 06:19:40,179 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-02-08 06:19:40,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 06:19:40,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673976175] [2025-02-08 06:19:40,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673976175] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 06:19:40,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470685835] [2025-02-08 06:19:40,179 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 06:19:40,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 06:19:40,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 06:19:40,181 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) [2025-02-08 06:19:40,183 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 [2025-02-08 06:19:40,212 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-02-08 06:19:40,228 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-02-08 06:19:40,228 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 06:19:40,228 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 06:19:40,229 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-02-08 06:19:40,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 06:19:40,526 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-02-08 06:19:40,526 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 06:19:40,651 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 [2025-02-08 06:19:41,029 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 06:19:41,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 39 treesize of output 43 [2025-02-08 06:19:41,186 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-02-08 06:19:41,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470685835] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 06:19:41,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 06:19:41,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 38 [2025-02-08 06:19:41,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664991588] [2025-02-08 06:19:41,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 06:19:41,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-02-08 06:19:41,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 06:19:41,187 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-02-08 06:19:41,188 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2025-02-08 06:19:41,188 INFO L87 Difference]: Start difference. First operand 189 states and 236 transitions. Second operand has 39 states, 32 states have (on average 2.21875) internal successors, (71), 33 states have internal predecessors, (71), 13 states have call successors, (17), 1 states have call predecessors, (17), 7 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2025-02-08 06:19:43,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 06:19:43,880 INFO L93 Difference]: Finished difference Result 420 states and 537 transitions. [2025-02-08 06:19:43,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2025-02-08 06:19:43,880 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 32 states have (on average 2.21875) internal successors, (71), 33 states have internal predecessors, (71), 13 states have call successors, (17), 1 states have call predecessors, (17), 7 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) Word has length 52 [2025-02-08 06:19:43,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 06:19:43,882 INFO L225 Difference]: With dead ends: 420 [2025-02-08 06:19:43,882 INFO L226 Difference]: Without dead ends: 395 [2025-02-08 06:19:43,884 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=703, Invalid=6269, Unknown=0, NotChecked=0, Total=6972 [2025-02-08 06:19:43,884 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 250 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 1408 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 1565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2025-02-08 06:19:43,884 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 761 Invalid, 1565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1408 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2025-02-08 06:19:43,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2025-02-08 06:19:43,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 256. [2025-02-08 06:19:43,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 193 states have (on average 1.1709844559585492) internal successors, (226), 193 states have internal predecessors, (226), 38 states have call successors, (38), 13 states have call predecessors, (38), 22 states have return successors, (61), 49 states have call predecessors, (61), 38 states have call successors, (61) [2025-02-08 06:19:43,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 325 transitions. [2025-02-08 06:19:43,894 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 325 transitions. Word has length 52 [2025-02-08 06:19:43,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 06:19:43,895 INFO L471 AbstractCegarLoop]: Abstraction has 256 states and 325 transitions. [2025-02-08 06:19:43,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 32 states have (on average 2.21875) internal successors, (71), 33 states have internal predecessors, (71), 13 states have call successors, (17), 1 states have call predecessors, (17), 7 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2025-02-08 06:19:43,895 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 325 transitions. [2025-02-08 06:19:43,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-02-08 06:19:43,895 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 06:19:43,895 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 06:19:43,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-08 06:19:44,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-02-08 06:19:44,096 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 14 more)] === [2025-02-08 06:19:44,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 06:19:44,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1743185009, now seen corresponding path program 1 times [2025-02-08 06:19:44,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 06:19:44,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370442068] [2025-02-08 06:19:44,097 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 06:19:44,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 06:19:44,103 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-02-08 06:19:44,108 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-02-08 06:19:44,108 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 06:19:44,108 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 06:19:44,248 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-02-08 06:19:44,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 06:19:44,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370442068] [2025-02-08 06:19:44,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370442068] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 06:19:44,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386085474] [2025-02-08 06:19:44,249 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 06:19:44,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 06:19:44,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 06:19:44,251 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) [2025-02-08 06:19:44,251 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 [2025-02-08 06:19:44,284 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-02-08 06:19:44,303 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-02-08 06:19:44,303 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 06:19:44,303 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 06:19:44,304 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-02-08 06:19:44,305 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 06:19:44,502 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-02-08 06:19:44,503 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 06:19:44,526 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 29 treesize of output 25 [2025-02-08 06:19:45,054 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-02-08 06:19:45,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386085474] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 06:19:45,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 06:19:45,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 30 [2025-02-08 06:19:45,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122773538] [2025-02-08 06:19:45,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 06:19:45,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-02-08 06:19:45,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 06:19:45,055 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-02-08 06:19:45,055 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=788, Unknown=0, NotChecked=0, Total=870 [2025-02-08 06:19:45,055 INFO L87 Difference]: Start difference. First operand 256 states and 325 transitions. Second operand has 30 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 states have internal predecessors, (71), 11 states have call successors, (17), 1 states have call predecessors, (17), 6 states have return successors, (17), 13 states have call predecessors, (17), 11 states have call successors, (17) [2025-02-08 06:19:45,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 06:19:45,820 INFO L93 Difference]: Finished difference Result 434 states and 566 transitions. [2025-02-08 06:19:45,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-08 06:19:45,821 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 states have internal predecessors, (71), 11 states have call successors, (17), 1 states have call predecessors, (17), 6 states have return successors, (17), 13 states have call predecessors, (17), 11 states have call successors, (17) Word has length 52 [2025-02-08 06:19:45,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 06:19:45,823 INFO L225 Difference]: With dead ends: 434 [2025-02-08 06:19:45,823 INFO L226 Difference]: Without dead ends: 415 [2025-02-08 06:19:45,823 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=267, Invalid=1895, Unknown=0, NotChecked=0, Total=2162 [2025-02-08 06:19:45,824 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 46 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-08 06:19:45,824 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 501 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-08 06:19:45,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2025-02-08 06:19:45,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 173. [2025-02-08 06:19:45,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 123 states have (on average 1.170731707317073) internal successors, (144), 129 states have internal predecessors, (144), 32 states have call successors, (32), 13 states have call predecessors, (32), 16 states have return successors, (41), 30 states have call predecessors, (41), 31 states have call successors, (41) [2025-02-08 06:19:45,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 217 transitions. [2025-02-08 06:19:45,848 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 217 transitions. Word has length 52 [2025-02-08 06:19:45,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 06:19:45,849 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 217 transitions. [2025-02-08 06:19:45,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 states have internal predecessors, (71), 11 states have call successors, (17), 1 states have call predecessors, (17), 6 states have return successors, (17), 13 states have call predecessors, (17), 11 states have call successors, (17) [2025-02-08 06:19:45,849 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 217 transitions. [2025-02-08 06:19:45,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-02-08 06:19:45,849 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 06:19:45,849 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 06:19:45,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-08 06:19:46,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 06:19:46,050 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting checkErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 14 more)] === [2025-02-08 06:19:46,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 06:19:46,051 INFO L85 PathProgramCache]: Analyzing trace with hash -3748698, now seen corresponding path program 1 times [2025-02-08 06:19:46,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 06:19:46,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682565248] [2025-02-08 06:19:46,051 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 06:19:46,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 06:19:46,055 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-02-08 06:19:46,063 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-02-08 06:19:46,063 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 06:19:46,063 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 06:19:46,148 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2025-02-08 06:19:46,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 06:19:46,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682565248] [2025-02-08 06:19:46,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682565248] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 06:19:46,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843807534] [2025-02-08 06:19:46,149 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 06:19:46,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 06:19:46,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 06:19:46,151 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) [2025-02-08 06:19:46,153 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 [2025-02-08 06:19:46,186 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-02-08 06:19:46,203 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-02-08 06:19:46,203 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 06:19:46,203 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 06:19:46,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-02-08 06:19:46,208 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 06:19:46,534 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-08 06:19:46,535 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 06:19:46,726 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 35 treesize of output 31 [2025-02-08 06:19:46,920 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-08 06:19:46,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843807534] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 06:19:46,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 06:19:46,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13, 11] total 27 [2025-02-08 06:19:46,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89165121] [2025-02-08 06:19:46,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 06:19:46,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-02-08 06:19:46,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 06:19:46,922 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-02-08 06:19:46,922 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2025-02-08 06:19:46,922 INFO L87 Difference]: Start difference. First operand 173 states and 217 transitions. Second operand has 27 states, 25 states have (on average 2.76) internal successors, (69), 22 states have internal predecessors, (69), 12 states have call successors, (23), 8 states have call predecessors, (23), 4 states have return successors, (17), 11 states have call predecessors, (17), 9 states have call successors, (17) [2025-02-08 06:19:50,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-02-08 06:19:51,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 06:19:51,543 INFO L93 Difference]: Finished difference Result 160 states and 190 transitions. [2025-02-08 06:19:51,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-02-08 06:19:51,544 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.76) internal successors, (69), 22 states have internal predecessors, (69), 12 states have call successors, (23), 8 states have call predecessors, (23), 4 states have return successors, (17), 11 states have call predecessors, (17), 9 states have call successors, (17) Word has length 54 [2025-02-08 06:19:51,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 06:19:51,545 INFO L225 Difference]: With dead ends: 160 [2025-02-08 06:19:51,548 INFO L226 Difference]: Without dead ends: 160 [2025-02-08 06:19:51,549 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 87 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=285, Invalid=1607, Unknown=0, NotChecked=0, Total=1892 [2025-02-08 06:19:51,549 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 185 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2025-02-08 06:19:51,549 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 416 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 510 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2025-02-08 06:19:51,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2025-02-08 06:19:51,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 142. [2025-02-08 06:19:51,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 102 states have (on average 1.107843137254902) internal successors, (113), 105 states have internal predecessors, (113), 26 states have call successors, (26), 11 states have call predecessors, (26), 13 states have return successors, (33), 25 states have call predecessors, (33), 25 states have call successors, (33) [2025-02-08 06:19:51,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 172 transitions. [2025-02-08 06:19:51,555 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 172 transitions. Word has length 54 [2025-02-08 06:19:51,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 06:19:51,555 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 172 transitions. [2025-02-08 06:19:51,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.76) internal successors, (69), 22 states have internal predecessors, (69), 12 states have call successors, (23), 8 states have call predecessors, (23), 4 states have return successors, (17), 11 states have call predecessors, (17), 9 states have call successors, (17) [2025-02-08 06:19:51,555 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 172 transitions. [2025-02-08 06:19:51,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2025-02-08 06:19:51,556 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 06:19:51,557 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 06:19:51,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-08 06:19:51,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-08 06:19:51,757 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting checkErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 14 more)] === [2025-02-08 06:19:51,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 06:19:51,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1511307547, now seen corresponding path program 1 times [2025-02-08 06:19:51,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 06:19:51,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839368107] [2025-02-08 06:19:51,758 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 06:19:51,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 06:19:51,763 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 69 statements into 1 equivalence classes. [2025-02-08 06:19:51,771 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 69 of 69 statements. [2025-02-08 06:19:51,771 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 06:19:51,771 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 06:19:52,099 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2025-02-08 06:19:52,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 06:19:52,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839368107] [2025-02-08 06:19:52,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839368107] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 06:19:52,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425645087] [2025-02-08 06:19:52,099 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 06:19:52,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 06:19:52,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 06:19:52,102 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) [2025-02-08 06:19:52,103 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 [2025-02-08 06:19:52,136 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 69 statements into 1 equivalence classes. [2025-02-08 06:19:52,156 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 69 of 69 statements. [2025-02-08 06:19:52,157 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 06:19:52,157 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 06:19:52,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-02-08 06:19:52,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 06:19:52,375 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2025-02-08 06:19:52,376 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 06:19:52,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425645087] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 06:19:52,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-08 06:19:52,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2025-02-08 06:19:52,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401793821] [2025-02-08 06:19:52,658 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-08 06:19:52,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-08 06:19:52,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 06:19:52,659 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-08 06:19:52,659 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2025-02-08 06:19:52,659 INFO L87 Difference]: Start difference. First operand 142 states and 172 transitions. Second operand has 24 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 19 states have internal predecessors, (46), 10 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2025-02-08 06:19:53,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 06:19:53,675 INFO L93 Difference]: Finished difference Result 292 states and 363 transitions. [2025-02-08 06:19:53,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-02-08 06:19:53,675 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 19 states have internal predecessors, (46), 10 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 69 [2025-02-08 06:19:53,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 06:19:53,676 INFO L225 Difference]: With dead ends: 292 [2025-02-08 06:19:53,676 INFO L226 Difference]: Without dead ends: 240 [2025-02-08 06:19:53,677 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=414, Invalid=2778, Unknown=0, NotChecked=0, Total=3192 [2025-02-08 06:19:53,677 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 188 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-08 06:19:53,677 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 616 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-08 06:19:53,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2025-02-08 06:19:53,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 164. [2025-02-08 06:19:53,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 122 states have (on average 1.098360655737705) internal successors, (134), 121 states have internal predecessors, (134), 28 states have call successors, (28), 11 states have call predecessors, (28), 13 states have return successors, (37), 31 states have call predecessors, (37), 27 states have call successors, (37) [2025-02-08 06:19:53,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 199 transitions. [2025-02-08 06:19:53,687 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 199 transitions. Word has length 69 [2025-02-08 06:19:53,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 06:19:53,687 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 199 transitions. [2025-02-08 06:19:53,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 19 states have internal predecessors, (46), 10 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2025-02-08 06:19:53,687 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 199 transitions. [2025-02-08 06:19:53,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2025-02-08 06:19:53,688 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 06:19:53,688 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 06:19:53,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-08 06:19:53,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 06:19:53,893 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting checkErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 14 more)] === [2025-02-08 06:19:53,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 06:19:53,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1538895268, now seen corresponding path program 1 times [2025-02-08 06:19:53,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 06:19:53,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612126661] [2025-02-08 06:19:53,894 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 06:19:53,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 06:19:53,903 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 69 statements into 1 equivalence classes. [2025-02-08 06:19:53,907 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 69 of 69 statements. [2025-02-08 06:19:53,907 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 06:19:53,908 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 06:19:54,071 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2025-02-08 06:19:54,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 06:19:54,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612126661] [2025-02-08 06:19:54,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612126661] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 06:19:54,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429602318] [2025-02-08 06:19:54,072 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 06:19:54,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 06:19:54,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 06:19:54,073 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) [2025-02-08 06:19:54,075 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 [2025-02-08 06:19:54,109 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 69 statements into 1 equivalence classes. [2025-02-08 06:19:54,131 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 69 of 69 statements. [2025-02-08 06:19:54,131 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 06:19:54,131 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 06:19:54,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-02-08 06:19:54,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 06:19:54,440 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2025-02-08 06:19:54,441 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 06:19:54,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429602318] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 06:19:54,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-08 06:19:54,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 24 [2025-02-08 06:19:54,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260378623] [2025-02-08 06:19:54,752 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-08 06:19:54,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-08 06:19:54,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 06:19:54,753 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-08 06:19:54,753 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=746, Unknown=0, NotChecked=0, Total=812 [2025-02-08 06:19:54,753 INFO L87 Difference]: Start difference. First operand 164 states and 199 transitions. Second operand has 24 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 11 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 11 states have call predecessors, (16), 9 states have call successors, (16) [2025-02-08 06:19:55,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 06:19:55,009 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2025-02-08 06:19:55,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 06:19:55,009 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 11 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 11 states have call predecessors, (16), 9 states have call successors, (16) Word has length 69 [2025-02-08 06:19:55,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 06:19:55,010 INFO L225 Difference]: With dead ends: 53 [2025-02-08 06:19:55,010 INFO L226 Difference]: Without dead ends: 0 [2025-02-08 06:19:55,010 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2025-02-08 06:19:55,010 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 24 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-08 06:19:55,011 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 299 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-08 06:19:55,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-02-08 06:19:55,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-02-08 06:19:55,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 06:19:55,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-02-08 06:19:55,011 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 69 [2025-02-08 06:19:55,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 06:19:55,011 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-02-08 06:19:55,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 11 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 11 states have call predecessors, (16), 9 states have call successors, (16) [2025-02-08 06:19:55,012 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-02-08 06:19:55,012 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2025-02-08 06:19:55,014 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (16 of 17 remaining) [2025-02-08 06:19:55,014 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE (15 of 17 remaining) [2025-02-08 06:19:55,014 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (14 of 17 remaining) [2025-02-08 06:19:55,014 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE (13 of 17 remaining) [2025-02-08 06:19:55,015 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 17 remaining) [2025-02-08 06:19:55,015 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 17 remaining) [2025-02-08 06:19:55,015 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 17 remaining) [2025-02-08 06:19:55,015 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 17 remaining) [2025-02-08 06:19:55,015 INFO L782 garLoopResultBuilder]: Registering result SAFE for location checkErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 17 remaining) [2025-02-08 06:19:55,015 INFO L782 garLoopResultBuilder]: Registering result SAFE for location checkErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 17 remaining) [2025-02-08 06:19:55,015 INFO L782 garLoopResultBuilder]: Registering result SAFE for location checkErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 17 remaining) [2025-02-08 06:19:55,015 INFO L782 garLoopResultBuilder]: Registering result SAFE for location checkErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 17 remaining) [2025-02-08 06:19:55,015 INFO L782 garLoopResultBuilder]: Registering result SAFE for location checkErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 17 remaining) [2025-02-08 06:19:55,015 INFO L782 garLoopResultBuilder]: Registering result SAFE for location checkErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 17 remaining) [2025-02-08 06:19:55,015 INFO L782 garLoopResultBuilder]: Registering result SAFE for location checkErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 17 remaining) [2025-02-08 06:19:55,015 INFO L782 garLoopResultBuilder]: Registering result SAFE for location checkErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 17 remaining) [2025-02-08 06:19:55,015 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 17 remaining) [2025-02-08 06:19:55,022 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 [2025-02-08 06:19:55,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 06:19:55,218 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 06:19:55,220 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-08 06:19:55,222 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.02 06:19:55 BoogieIcfgContainer [2025-02-08 06:19:55,222 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-08 06:19:55,223 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-08 06:19:55,223 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-08 06:19:55,223 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-08 06:19:55,223 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 06:19:19" (3/4) ... [2025-02-08 06:19:55,225 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-02-08 06:19:55,229 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2025-02-08 06:19:55,229 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure check [2025-02-08 06:19:55,229 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2025-02-08 06:19:55,232 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 22 nodes and edges [2025-02-08 06:19:55,232 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2025-02-08 06:19:55,232 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2025-02-08 06:19:55,232 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-02-08 06:19:55,288 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-02-08 06:19:55,288 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.yml [2025-02-08 06:19:55,288 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-08 06:19:55,289 INFO L158 Benchmark]: Toolchain (without parser) took 36498.21ms. Allocated memory was 142.6MB in the beginning and 343.9MB in the end (delta: 201.3MB). Free memory was 112.4MB in the beginning and 232.5MB in the end (delta: -120.1MB). Peak memory consumption was 79.9MB. Max. memory is 16.1GB. [2025-02-08 06:19:55,289 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 201.3MB. Free memory is still 130.7MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 06:19:55,289 INFO L158 Benchmark]: CACSL2BoogieTranslator took 180.10ms. Allocated memory is still 142.6MB. Free memory was 111.7MB in the beginning and 101.2MB in the end (delta: 10.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-08 06:19:55,289 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.94ms. Allocated memory is still 142.6MB. Free memory was 101.2MB in the beginning and 99.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 06:19:55,290 INFO L158 Benchmark]: Boogie Preprocessor took 31.29ms. Allocated memory is still 142.6MB. Free memory was 99.7MB in the beginning and 98.3MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 06:19:55,290 INFO L158 Benchmark]: IcfgBuilder took 327.36ms. Allocated memory is still 142.6MB. Free memory was 98.3MB in the beginning and 81.6MB in the end (delta: 16.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-02-08 06:19:55,290 INFO L158 Benchmark]: TraceAbstraction took 35856.98ms. Allocated memory was 142.6MB in the beginning and 343.9MB in the end (delta: 201.3MB). Free memory was 81.6MB in the beginning and 236.3MB in the end (delta: -154.7MB). Peak memory consumption was 46.4MB. Max. memory is 16.1GB. [2025-02-08 06:19:55,290 INFO L158 Benchmark]: Witness Printer took 65.84ms. Allocated memory is still 343.9MB. Free memory was 236.3MB in the beginning and 232.5MB in the end (delta: 3.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-08 06:19:55,291 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 201.3MB. Free memory is still 130.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 180.10ms. Allocated memory is still 142.6MB. Free memory was 111.7MB in the beginning and 101.2MB in the end (delta: 10.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.94ms. Allocated memory is still 142.6MB. Free memory was 101.2MB in the beginning and 99.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 31.29ms. Allocated memory is still 142.6MB. Free memory was 99.7MB in the beginning and 98.3MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 327.36ms. Allocated memory is still 142.6MB. Free memory was 98.3MB in the beginning and 81.6MB in the end (delta: 16.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 35856.98ms. Allocated memory was 142.6MB in the beginning and 343.9MB in the end (delta: 201.3MB). Free memory was 81.6MB in the beginning and 236.3MB in the end (delta: -154.7MB). Peak memory consumption was 46.4MB. Max. memory is 16.1GB. * Witness Printer took 65.84ms. Allocated memory is still 343.9MB. Free memory was 236.3MB in the beginning and 232.5MB in the end (delta: 3.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 40]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 5]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 62 locations, 17 error locations. Started 1 CEGAR loops. OverallTime: 35.8s, OverallIterations: 20, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 18.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 1792 SdHoareTripleChecker+Valid, 12.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1754 mSDsluCounter, 6682 SdHoareTripleChecker+Invalid, 11.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5800 mSDsCounter, 634 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7015 IncrementalHoareTripleChecker+Invalid, 7651 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 634 mSolverCounterUnsat, 882 mSDtfsCounter, 7015 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1219 GetRequests, 683 SyntacticMatches, 18 SemanticMatches, 518 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4751 ImplicationChecksByTransitivity, 13.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=256occurred in iteration=16, InterpolantAutomatonStates: 311, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 20 MinimizatonAttempts, 710 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 13.9s InterpolantComputationTime, 1259 NumberOfCodeBlocks, 1259 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 1511 ConstructedInterpolants, 62 QuantifiedInterpolants, 9806 SizeOfPredicates, 84 NumberOfNonLiveVariables, 2162 ConjunctsInSsa, 295 ConjunctsInUnsatCore, 39 InterpolantComputations, 10 PerfectInterpolantSequences, 572/733 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 17 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-02-08 06:19:55,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE